CN116585866A - Dry denitrification system - Google Patents

Abstract

The invention discloses a dry denitrification system, which belongs to the field of boiler flue gas treatment, and includes feeding equipment, a feeding bin, a feeding device, a feeding device, a fan, and a boiler. The central axis of the feeding bin is arranged obliquely relative to the horizontal direction. The driving device drives the silo to rotate along its central axis; the front end and the rear end of the silo are respectively provided with a feeding window and a feeding hole of the silo, the feeding port of the feeding equipment is connected with the feeding window, and the feeding device is set on On the outer surface of the rear end of the silo, the feeder is arranged at the obliquely rear lower part of the unloading device, the blower is connected with the feeder through the inlet pipe, and the feeder is connected with the boiler through the discharge pipe. In the present invention, the silo is tilted on the side and continuously rotated, which solves the problem of agglomeration of the denitrification agent in the silo during continuous feeding, ensures the stability, continuity and smoothness of feeding, and cancels the rapping motor. Prevent the denitrification agent from sticking to the silo, avoid the problems of denitrification agent vibration and agglomeration and denitrification equipment running stuck, and reduce the cost of equipment.

Description

Dry denitrification system

technical field

The invention relates to the field of boiler flue gas treatment, in particular to a dry denitrification system.

Background technique

In order to prevent the nitrogen oxides produced after coal combustion in the boiler from polluting the environment, the boiler flue gas should be denitrified. With the continuous improvement of environmental protection requirements, the requirements for the removal of nitrogen oxides in flue gas are becoming more and more stringent. Not only the indicators must meet the ultra-low emission standards, but also the time control is extremely strict. The traditional SNCR sprays ammonia water or urea solution in the furnace, which is a wet denitrification method, which cannot stably meet the ultra-low emission standard, and also has a series of problems such as corrosion, pipe burst, energy waste, and inconvenient storage and transportation.

Dry denitrification is a relatively economical method for denitrification of boiler flue gas. Powder or granular denitrification agent is sprayed in the boiler to react with nitrogen oxides in boiler flue gas to achieve denitrification. Dry denitrification puts forward higher requirements on the operation stability, continuity and smoothness of feeding of denitrification equipment. Conventional dry denitrification equipment includes a vertically fixed silo, in which the denitrification agent is stored, and a stirring motor is installed on the silo to drive the stirring blades to stir the denitrification agent to prevent uneven feeding or stop, and a vibration motor is installed to prevent The denitrification agent sticks to the silo.

The bottom of the silo is equipped with a star-shaped unloading valve or a feeder of similar structure, through which the denitrification agent falls into the Venturi tube below the silo for temporary storage. The Venturi tube is connected to the conveying pipeline, and the pressure air is provided by the fan, and the denitrification agent temporarily stored in the Venturi tube is blown into the boiler along the conveying pipeline, and the denitrifying material undergoes a reduction reaction with nitrogen oxides inside the boiler to perform denitrification.

Whether it is a stirring motor or a vibration motor, it cannot fully guarantee that the denitration agent will not agglomerate. Although the stirring motor can stir the denitrification agent to a certain extent, due to the extrusion of the denitrification agent by the stirring blades during stirring, it is easy to cause the denitrification agent to agglomerate due to extrusion in the silo. Although the rapping motor can vibrate the denitrification agent stuck on the silo, under the action of vibration, the denitrification agent is easy to vibrate and agglomerate at the bottom of the silo. The agglomeration of the denitration agent will affect the stability, continuity and smoothness of the blanking. Moreover, when the rapping motor vibrates, due to the impact of the vibration on the denitrification equipment, it is easy to cause the operation of the denitrification equipment to freeze, and it will also cause the denitrification agent to be unloaded smoothly. In addition, the silo is equipped with multiple motors (at least one stirring motor and at least one rapping motor), which leads to high equipment costs.

Contents of the invention

In order to solve the problems of the prior art, the present invention provides a dry denitrification system, which solves the problem of the denitrification agent agglomerating in the silo and sticking to the silo, and ensures the stability, continuity and smoothness of feeding , reducing the cost of equipment.

The present invention provides technical scheme as follows:

A dry denitrification system, including feeding equipment, dry denitrification equipment and a boiler, wherein:

The dry-process denitrification equipment includes a silo, a feeding device, a feeder and a fan, and the silo is arranged inclined with the rear end facing downward and the front end facing upward, so that the central axis of the silo is relative to the horizontal direction. It is arranged obliquely, and the silo is connected with a driving device that drives the silo to rotate with its own central axis as the rotating shaft;

The front end of the silo is provided with a feeding window, and the rear end of the silo is provided with a set of feeding holes for the hopper, the feeding port of the feeding device communicates with the feeding window, and the lower The feeding device is obliquely arranged on the outer surface of the rear end of the silo, the feeding device is arranged obliquely below the oblique rear of the feeding device, the fan is connected to the feeding device through an air inlet pipe, and the feeding device The feeder is connected with the boiler through a discharge pipe.

Further, a group of material guide plates that cooperate with a group of material bin lowering holes are fixed on the inner surface of the rear end of the silo, and the material guide plates are perpendicular to the inner surface of the rear end of the silo. or tilt settings;

The inner end of each material guide plate extends to the feeding hole of the silo matched with it, and the outer end extends outward on the rear end of the material silo, and each material guide plate is in the direction of rotation of the material silo Located at the rear of the feeding hole of the feeding bin matched with it, the material guide plate guides the denitration agent inwardly to the feeding hole of the feeding bin.

Further, the material guide plate is connected with a material baffle plate near the inner end, the material baffle plate is located inside the feeding hole of the silo, and the material baffle plate and the material guide plate form a The V-shaped material blocking structure, the hopper lowering hole is located on the outside of the V-shaped material blocking structure, and the V-shaped material blocking structure blocks the denitrification agent guided inward from the material guide plate in the V The feeding hole of the silo outside the shaped retaining structure.

Further, there are multiple feed holes and material guide plates in the silo, and the material baffle plate corresponding to each material guide plate is a part near the inner side of other material guide plates.

Further, a material shifting plate is fixedly arranged on the inner surface of the side wall of the silo, and the front end and the rear end of the material silo respectively extend toward the front end side and the rear end side of the material silo, and the material shifting plate The tangent plane at the joint between the material plate and the inner surface of the side wall of the silo is perpendicular to or inclined to the material shifting plate.

Further, the rear end of the shifting plate is connected to the outer end of the material guide plate, and the denitrification agent sliding to the rear end of the shifting plate enters the material guide plate from the connection.

Further, the unloading device includes a first-level unloading pan, a second-level unloading pan, and a third-level unloading pan arranged obliquely in sequence from the upper front to the lower rear. The first-level unloading pan, the second unloading pan The contacting surfaces between the first-level feeding tray and the third-level feeding tray are closely attached together;

The first-stage blanking tray, the second-stage blanking tray, and the third-stage blanking tray are respectively provided with a first set of blanking holes, a second set of blanking holes, and a third set of blanking holes. A group of blanking holes, a second group of blanking holes and a third group of blanking holes respectively run through the thickness direction of the first-stage blanking tray, the second-stage blanking tray and the third-stage blanking tray;

The relative rotation between the first-stage blanking tray, the second-stage blanking tray and the third-stage blanking tray, when the relative rotation is such that the first set of blanking holes communicate with the second set of blanking holes, the The second group of blanking holes is not connected with the third group of blanking holes. When the relative rotation is such that the second group of blanking holes communicates with the third group of blanking holes, the first group of blanking holes and the second group of blanking holes are connected. Group feeding holes are not connected.

Further, the silo discharge holes, the first group of discharge holes, the second group of discharge holes and the third group of discharge holes are located at the rear end of the silo, the first-stage discharge tray, the second The center of the first-level unloading tray and the third-level unloading tray are evenly distributed on a circle whose radius is R, and the rear end of the silo, the first-level unloading pan, the second-level unloading tray and the third-level underfill pan are evenly distributed. The centers of the feed trays are all located on the central axis of the feed bin.

Further, the first-stage unloading tray and the third-stage unloading tray are fixed, the second-stage unloading tray rotates around the central axis of the silo, and the first group of unloading holes Staggered setting with the third group of blanking holes.

Further, a hopper follow-up discharge tray is set between the first-stage discharge tray and the rear end of the silo, and the silo follow-up discharge tray is fixed on the outer surface of the rear end of the silo , the contacting surfaces between the follow-up feeding tray of the silo and the first-stage feeding tray are closely attached together;

A set of follow-up feeding holes is provided on the follow-up feeding tray of the silo, and the feed silo discharge holes, follow-up discharge holes and the second group of discharge holes are arranged in alignment. Both the moving unloading tray and the second-stage unloading tray rotate synchronously with the central axis of the silo as the rotating shaft.

Further, the contacting surfaces of the silo follow-up unloading tray, the first-stage unloading tray, the second-stage unloading tray and the third-stage unloading tray are made of polytetrafluoroethylene.

Further, a group of limiting plates is provided on the outer surface of the rear end of the silo, and the group of limiting plates forms a limiting groove, and the edge of the limiting groove has a first group of limiting planes. There is a second set of limit planes on the outer periphery of the bin follow-up feeding tray, and the bin follow-up feeding tray is located in the limit groove, so that the surface of the front end of the bin follow-up feeding tray is attached to the The outer surface of the rear end of the silo, and the second set of limiting planes cooperate with the first set of limiting planes.

Further, the center of the outer surface of the rear end of the silo is fixed with a silo sleeve extending obliquely rearward and downward, the central axis of the silo sleeve coincides with the central axis of the silo, and the The silo follow-up unloading tray, the first-stage unloading tray and the second-stage unloading tray are pierced on the silo shaft sleeve through the through holes opened in the respective centers;

The first-stage unloading tray is not connected to the silo bushing, and the second-stage unloading tray is connected to the silo bushing through a follow-up structure, so that the second-stage unloading tray follows the The shaft sleeves of the silo rotate synchronously.

Further, a pressure plate is provided on the obliquely rear lower side of the second-stage discharge tray, and the pressure plate is sleeved on the silo bushing, and an external thread is provided on the rear end side of the silo bushing, so that A nut with a washer is screwed on the external thread, and the silo shaft sleeve between the pressure plate and the washer is covered with a spring for the lower material tray, and the compression spring for the lower material tray passes through the pressure plate Press the second-stage feeding tray, the first-stage feeding tray and the silo follow-up feeding tray on the outer surface of the rear end of the silo, and the nut adjusts the pressing spring of the feeding tray of pressing force.

Further, the follow-up structure includes a keyway and a key, the keyway is set on the silo bushing, and the key is set in the through hole at the center of the second-stage lower tray;

Alternatively, the follow-up structure includes a keyway and a key, the keyway is set on the silo bushing, the key is set in the through hole in the center of the pressure plate, and the pressure plate is connected to the first pin through a pin. The secondary feeding tray is fixedly connected.

Further, the central part of the surface of the rear end of the second-stage lower tray has a circular boss that protrudes obliquely rearward and downward, the pressure plate is pressed on the circular boss, and the third-stage lower tray The tray is sleeved on the outer periphery of the circular boss through the through hole in its own center;

Alternatively, the pressure plate is pressed against the surface of the rear end of the second-stage blanking plate, and the third-stage blanking plate is sleeved on the outer periphery of the pressure plate through a through hole in its center.

Further, the blanking device is arranged on the obliquely rear lower side of the third-stage discharging tray, the discharging device is arranged obliquely, and there is a blanking channel arranged obliquely inside the blanking device, and the blanking channel The top and the bottom end are respectively connected with the air inlet pipe and the discharge pipe;

The third-stage unloading tray is fixed on the outer surface of the front end of the feeder, and the front end of the feeder is provided with a feeder hole, and the feeder hole is connected to the first Three groups of feeding holes are aligned.

Further, the middle part of the front end of the feeder is provided with a through hole, and the surface of the rear end of the third-stage feeding tray is attached to the outer surface of the front end of the feeder, behind the third-stage feeding tray The oblique rear and lower structure on the surface of the end protrudes into the dropper from the through hole.

Further, a silo support is provided below the silo, and the silo is obliquely arranged on the silo support; a feeder fixing seat is provided on the obliquely rear lower side of the feeder, and the feeder is fixed The seat has a square body cavity with an open front end, and the bottom end of the feeder fixing seat is obliquely fixed on the bin support, and the unloading device and the feeder are connected from the opening of the front end of the square body cavity. Extending into the cavity of the square body, the feeder is fixed on the fixing seat of the feeder.

Further, a third set of limiting planes is provided on the left and/or right outer circumference of the first-level unloading tray, and A fourth set of limit planes is provided, and the third set of limit planes and the fourth set of limit planes cooperate with the left side wall and/or the right side wall of the feeder fixing base to limit positions.

Further, the storage bin is a cylindrical structure, the driving device includes a motor and a plurality of support wheels arranged on the support of the storage bin, the storage bin is arranged obliquely on the plurality of support wheels, and the storage bin The lower part of the side wall of the bin is in contact with the outer peripheral surface of the support wheel, the motor is connected to some or all of the multiple support wheels, and the support wheel connected to the motor is driven by the motor in a frictional manner The feed bin rotates around its own central axis as a rotating shaft.

Further, a plurality of support wheels are distributed on the left and right sides below the side wall of the silo, the rotation axes of the plurality of support wheels are arranged obliquely and parallel to the central axis of the silo, and the motor is connected to the center axis of the silo. Support wheel connection on the left or right under the side wall.

Further, there is a pressure wheel above the side wall of the silo, the pressure wheel is set on the pressure wheel bracket, the pressure wheel bracket is fixed on the silo bracket, and the rotation axis of the pressure wheel is set obliquely And parallel to the central axis of the silo, the bottom of the outer peripheral surface of the pressure roller is pressed against the top of the side wall of the silo.

Further, the pressure wheel support includes two uprights and a crossbeam, the two uprights are located on the left and right sides of the silo, and the crossbeam is located above the side wall of the silo and connected to the two uprights;

A pressure roller installation rod is arranged above the side wall of the silo, the pressure roller is installed on the pressure roller installation rod, the pressure roller installation rod is located below the crossbeam and the pressure roller installation rod is movably installed on the On the column, a device is provided between the pressure roller installation rod and the crossbeam to press down the pressure roller installation rod so that the bottom of the outer peripheral surface of the pressure roller is pressed against the top of the side wall of the silo. the compression mechanism.

Further, the first end of the pressure roller installation rod is rotatably connected to a column, the second end of the pressure roller installation rod is relatively slidable with another column, and the pressing mechanism is a compression spring , the compression spring is located at the second end of the pressure roller installation rod, and the lower end and the upper end of the compression spring are respectively connected with the pressure roller installation rod and the beam, and the second end of the pressure roller installation rod Under the elastic force of the pressing spring, the bottom of the outer peripheral surface of the pressure roller is pressed downward on the top of the side wall of the storage bin.

Further, a weighing device is provided under the silo support, the weighing device is arranged on the base, the silo support is located on the weighing device, and the weighing device communicates with the upper Material equipment connection.

Further, a balance shaft is arranged under the silo support, the balance shaft is arranged horizontally and perpendicular to the central axis of the silo, the silo support is installed on the balance shaft and the silo support Able to swing back and forth along the balance shaft;

The position of the balance shaft is set so that when the weight of the denitration agent in the silo exceeds the first set value, the silo support swings in the direction in which the rear end of the silo sinks; When the weight of the denitration agent in the silo is less than the second set value, the silo bracket swings in the direction in which the front end of the silo sinks; the second set value is less than the first set value;

One of the front and rear sides of the balance shaft is provided with a first limit switch, the first limit switch is located below the silo bracket, and the first limit switch communicates with the feeding material through an electrical signal. The device is connected.

Further, the inlet pipe and outlet pipe are steel wire hoses.

Further, the other side of the front and rear sides of the balance shaft is provided with a second limit switch or a support block, the second limit switch or support block is located under the bin bracket, and the second limit switch or support block The position switch is connected with the feeding device through an electric signal.

Further, the rear end of the silo is connected with a counterweight located outside the silo.

Further, the rear end of the feeder is provided with a feeder installation shaft extending toward the rear and downward, and the installation shaft of the feeder extends from the through hole opened on the rear end of the holder of the feeder to the rear of the oblique The lower side protrudes from the feeder fixing seat, and a spherical washer is arranged between the feeder and the feeder fixing seat on the mounting shaft of the feeder.

Further, a support baffle is fixedly arranged on the outer surface of the rear end of the fixing seat of the feeder, and the support baffle is located below the installation shaft of the feeder, and the fixed position of the support baffle is adjustable up and down. The supporting baffle clamps the mounting shaft of the feeder in the up and down direction;

And/or, the part of the mounting shaft of the blanking device protruding from the fixing seat of the blanking device is covered with a fixed nut of the blanking device, and the fixing nut of the blanking device connects the blanking device to the fixed seat of the blanking device. Tighten the connection with the holder.

Further, the counterweight is arranged on the part of the mounting shaft of the blanker protruding from the fixing seat of the blanker.

Further, the shape of the feed window is circular, and a sieve is provided on the feed window, and the sieve is a cylindrical structure with an open front end, and the rear end and sides of the sieve are A sieve hole is arranged on the top, the front end of the sieve is connected to the feeding window, and the rear end and side of the sieve extend into the silo.

Further, an insulation layer is arranged on the wall of the silo, and an electric heating tube is arranged inside the insulation layer.

Further, the dry denitrification equipment also includes a protective cover and an electrical box, the silo, the feeding device, the feeder and the blower are arranged in the protective cover, and an inspection door is opened on the protective cover.

Further, the feeding device includes negative pressure feeding device or screw feeding device.

The present invention has the following beneficial effects:

In the present invention, the silo is tilted on the side and continuously rotated, which can not only realize the continuous feeding of the silo, but also solve the problem of agglomeration of the denitrification agent in the silo, and prevent denitrification under the condition of canceling the rapping motor The denitration agent sticks to the silo, avoiding the problems of denitrification agent vibration and agglomeration caused by the rapping motor and denitrification equipment running stuck, ensuring the stability, continuity and smoothness of feeding. The rapping motor is canceled, and only one motor is needed to drive the bin to rotate, which reduces the cost of the equipment.

Description of drawings

Fig. 1 is the schematic diagram of dry denitrification system of the present invention (feeding equipment is negative pressure feeding equipment);

Fig. 2 is the schematic diagram of dry denitrification system of the present invention (feeding equipment is screw feeding equipment);

Figure 3 is a perspective view of dry denitrification equipment;

Fig. 4 is a side view with a partial section of the dry denitrification equipment;

Fig. 5 is a schematic diagram of the main part of the dry denitrification equipment;

Fig. 6 is a schematic diagram of Fig. 5 after removing the feeder and the holder of the feeder;

FIG. 7 is a schematic diagram of another viewing angle of FIG. 6;

Fig. 8 is the assembly diagram of feed bin, feed bin support and driving device;

Fig. 9 is the schematic diagram of feed bin;

Fig. 10 is the schematic diagram of unloading device;

Fig. 11 is a schematic diagram of the setting method of the material guide plate;

Figure 12 is a partial cross-sectional view of a dry denitrification device using a weighing device;

Fig. 13 is an enlarged view of area A of Fig. 12 (when the first group of blanking holes communicates with the second group of blanking holes);

Figure 14 is an enlarged view of the area A of Figure 12 (when the second group of blanking holes communicates with the third group of blanking holes);

Figure 15 is a partial sectional view of a dry denitrification device using a limit switch;

Fig. 16 is an enlarged view of area B of Fig. 15 (when the first group of blanking holes communicates with the second group of blanking holes);

Figure 17 is a partial cross-sectional view of a dry denitrification device using two limit switches;

Fig. 18 is the schematic diagram of sieving device;

Figure 19 is a schematic diagram of a feeder;

Fig. 20 is a schematic diagram of the fixing seat of the feeder.

Detailed ways

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

An embodiment of the present invention provides a dry denitration system, as shown in Figure 1-20, feeding equipment 74, 75, dry denitration equipment 200 and a boiler, wherein:

The dry denitrification equipment 200 includes a silo 7, a feeding device 100, a feeder 11, and a fan 12. The silo 7 is arranged inclined with the rear end facing downward and the front end facing upward, so that the central axis of the silo 7 is relatively horizontal. The direction is inclined, and the feed bin 7 is connected with a driving device that drives the feed bin 7 to rotate with its own central axis as the rotating shaft.

The front end of the feed bin 7 is provided with a feed window 15, and the rear end of the feed bin 7 is provided with a group of feed bin discharge holes 8, and the feeding port 76 of the feeding device 74,75 is communicated with the feed window 15, specifically , The feeding port 76 stretches into the feeding window 15 to feed the denitrification agent for the feeding bin 7.

The unloading device 100 is obliquely arranged on the outer surface of the rear end of the silo 7, and the unloading device 11 is obliquely arranged under the oblique rear of the unloading device 100. The fan 12 is connected with the unloading device 11 through the air inlet pipe 66, and the unloading device 11 passes through the outlet. Material pipe 67 is connected with boiler.

The present invention defines the direction of appearance as follows: the front and rear directions are defined according to the feeding direction of the denitrification agent, and the position where the denitrification agent passes first is the front, and the position where the denitrification agent passes is the rear. The denitration agent first enters the silo from the feeding window 15, and then is fed from the feeding hole 8. Therefore, the end of the silo 7 with the feeding window 15 is defined as the front end, and the end with the feeding hole 8 is the rear end. Other components The front and rear definitions of silo 7 are as the criterion. Let the top and bottom of the height direction be the top and bottom of the present invention, and the direction perpendicular to the up-down direction and the front-back direction is defined as the left-right direction of the present invention. All subsequent directions are based on the definitions here.

The present invention changes the vertical setting method of the traditional dry denitrification equipment silo, and adopts a side-horizontal inclined setting for the silo 7, with a low rear end and a high front end, so that the central axis of the silo 7 has a certain inclination relative to the horizontal direction. Angle, and the bin 7 is driven to rotate continuously along its inclined central axis by the driving device. When in use, the feeding equipment 74, 75 feeds the denitrification agent into the silo 7 through the feed window 15, and during the rotation of the silo 7, the denitrification agent continuously enters the lower hole 8 of the hopper at the rear end of the silo 7. Feeding device 100 blanking. The denitrification agent is delivered to the feeder 11 through the feeder 100, and the fan 11 supplies pressure air to the feeder 11 through the inlet pipe 66, and blows the denitrification agent in the feeder 11 into the boiler along the discharge pipe 67. In the boiler, the denitration agent undergoes a reduction reaction with nitrogen oxides inside the boiler to perform denitrification.

The present invention changes the way of stirring the denitrification agent by driving the stirring blades by the stirring motor in the prior art, but uses the tilting and rotating manner of the feed bin 7 to stir the denitrification agent. During the tilting and rotating process of the silo 7, the denitration agent rises to a certain height driven by the inner wall of the silo 7, and then falls under the action of gravity, so that the denitrification agent is continuously turned and stirred. During the continuous rising and falling of the denitrification agent, it can prevent the denitrification agent from agglomerating. Feeding is uneven or stops. Compared with the stirring method of stirring blades in the prior art, this kind of tumbling stirring does not cause agglomeration caused by the extrusion of the denitration agent by the stirring blades.

During the rotation of the silo 7, since the inner wall of the silo 7 keeps rising and lowering repeatedly, the denitrification agent keeps rising and falling in the silo 7, so it is difficult for the denitrification agent to stick to the silo 7. on the inner wall. Even if a part of the denitrification agent has stuck to the inner wall of the feed bin 7, when the position rotates to the top, the stuck denitrification agent will fall under the action of gravity. In addition, during the turning and stirring process of the continuous rising and falling of the denitrification agent, there is also a certain amount of mutual friction between the denitrification agent and the inner wall of the hopper 7, and the stuck denitrification agent can also be made to fall under the effect of friction. Therefore, the present invention can not only prevent the denitrification agent from sticking to the silo 7, but also omit the rapping motor, prevent the denitrification agent from vibrating and agglomerating caused by the rapping motor, and avoid the denitrification equipment running stuck.

During the rotation process of the silo 7, the denitrification agent keeps rising and falling in the silo 7, turning and stirring continuously, because the silo 7 is inclined with the rear end facing downward, and the rear end is provided with a hopper lowering hole 8. Therefore, during the rotation process, the denitrification agent will be fed outward from the feed bin discharge hole 8 at the rear end while turning and stirring.

From the above, it can be seen that the present invention sets the silo sideways and tilts it and continues to rotate, which can not only realize the continuous feeding of the silo, but also solve the problem of agglomeration of the denitrification agent in the silo. Under the condition of canceling the vibration motor It can also prevent the denitrification agent from sticking to the silo, avoiding the vibration and agglomeration of the denitrification agent caused by the rapping motor and the jamming of the denitrification equipment, and ensuring the stability, continuity and smoothness of feeding. The rapping motor is canceled, and only one motor is needed to drive the bin to rotate, which reduces the cost of the equipment.

The inclination angle between the silo 7 and the horizontal direction is greater than 0° and less than 90°. The smaller the inclination angle of the silo 7, the greater the function of turning and stirring, and the more difficult it is for the denitration agent to enter the lower hole 8 of the silo. When the silo 7 is horizontal, the denitrification Agent can't get into feed bin discharge hole 8. The larger the inclination angle of the silo 7 is, the smaller the turning and stirring function is, and the easier it is for the denitrification agent to enter the feed hole 8 of the silo. When the denitrification agent rotates with the silo 7 when it is vertical, the turning and stirring cannot be realized.

In order to take into account the strength of the turning and stirring function and the difficulty of the denitration agent entering the feeding hole 8 of the feed bin, an appropriate inclination angle can be selected as required. For example, the inclination angle is selected within the range of 10°-40°.

The feed rate at which the denitration agent in the silo 7 enters the feeding hole 8 of the silo is regulated by the rotation speed of the silo 7, and the silo 7 rotates one revolution, and a set of feeding holes 8 of the silo completes a feeding process. The higher the rotating speed of the feed bin 7 is, the faster the blanking of the feed bin feed hole 8 will be, otherwise the slower the rotation speed of the feed bin 7 is regulated by the driving device.

As an improvement of the embodiment of the present invention, as shown in Figures 9 and 11, a set of material guide plates 16 are fixedly arranged on the inner surface of the rear end of the silo 7 to cooperate with a set of silo blanking holes one by one, The material guide plate 16 is an elongated plate-shaped structure, and the material guide plate 16 is vertically arranged with the rear end inner surface of the bin body 7, and can also be arranged obliquely at a certain angle.

The inner end of each material guide plate 16 extends to the feed bin lowering hole 8 that cooperates with it, and the outer end extends outward on the rear end of the feed bin 7, that is, the material guide plate 16 is approximately along the rear end of the feed bin 7. radial setting. Each material guide plate 16 is located at the rear of the rotation direction of the material bin lower hole 8 matched with it in the direction of rotation of the material bin 7, and the denitrification agent is located in the structure formed between the material guide plate 16 and the rear end of the material bin 7. During the rotation of the silo 7 , the material guide plate 16 guides the denitration agent inwardly to the silo discharge hole 8 , so that the material is discharged from the silo discharge hole 8 outward.

In the present invention, by setting the material guide plate 16 to guide the material in the silo discharge hole 8, the discharge of the hopper discharge hole 8 is facilitated. The material is fed into the silo discharge hole 8, which realizes the complete discharge of all the denitrification agents in the feed bin 7, and there will be no denitrification agent residues.

In order to further facilitate the denitrification agent to enter the feeding hole 8 of the silo, the material guide plate 16 is connected with a baffle plate 17 near the inner end. end center. The material retaining plate 17 and the material guide plate 16 form a V-shaped material retaining structure 18 towards the outside at the junction, and the feed bin feeding hole 8 is located on the outside of the V-shaped material retaining structure 18, and the V-shaped material retaining structure 18 will be drawn from the material guide plate. 16 The denitration agent guided inwardly is blocked at the feed bin lowering hole 8 outside the V-shaped retaining structure 18 . After the denitrification agent is guided to the V-shaped material retaining structure 18, due to the blocking of the material retaining plate 17, it can no longer continue to guide the material forward, and remains at the V-shaped material retaining structure 18, and then from the material located at the V-shaped material retaining structure 18. Storehouse discharge hole 8 discharges completely.

The quantity of the aforesaid silo lowering hole 8 and the material guide plate 16 is multiple, at this moment, a part of one material guide plate can be used as another material guide plate’s baffle plate, for example, each material guide plate The material baffle plate 17 corresponding to 16 is a part near the inner side of other material guide plates.

Taking three material guide plates 16 as an example, each material guide plate 16 is slightly deflected at a certain angle with the radial direction of the rear end of the material bin 7, and the three material guide plates 16 are connected to each other in the middle part, and at the rear of the material bin 7 A closed triangular structure 19 is formed around the center of the end, and a V-shaped material retaining structure 18 is formed by two material guide plates 16 on the outside of each apex of the closed triangular structure 19 .

As another improvement of the embodiment of the present invention, the silo 7 is a cylindrical structure, the two end surfaces of the cylindrical structure serve as the front end and the rear end of the silo 7 respectively, and the sides of the cylindrical structure serve as the side walls of the silo 7 . On the inner surface of the side wall of the feed bin 7, a material shifting plate 20 is fixedly arranged, and the material shifting plate 20 is a strip-shaped plate-shaped structure, and the front end and the rear end of the material shifting plate 20 are respectively towards the front end side and the rear end of the feed bin 7. One side extends, that is, the shifting plate 20 is roughly arranged along the height direction of the cylindrical structure, as shown in FIGS. 13 , 15 , and 17 . The tangent plane at the joint between the material shifting plate 20 and the inner surface of the side wall of the silo 1 and the material shifting plate 20 can be perpendicular to each other, and can also be arranged obliquely.

The shifting plate 20 can stir up the denitrification agent during the rotation of the feed bin 7 to improve the effect of turning and stirring. In addition, the rear end of the shifting plate 20 extends toward the rear end side of the silo 7, so that the denitrification agent on the shifting plate 20 can be directed to the rear end of the silo 7, so as to facilitate the feeding of the silo discharge hole 8.

The length direction of the material shifting plate 20 can be linear, and now the length direction of the material shifting plate 20 can be parallel to the central axis of the material bin 7, that is, parallel to the height direction of the cylindrical structure, and can also be set with it. angle. The angle of this included angle is small, and the shifting plate 20 cannot be perpendicular to the height direction of the cylindrical structure (that is, parallel to the front end face or the rear end face of the feed bin 7), because the effect of the shifting plate 20 cannot be realized in this way.

Alternatively, the length direction of the shifting plate 20 can also have a set arc structure, which makes it easier for the denitrification agent on the shifting plate 20 to guide to the rear end of the bin 7 during the rotation of the bin 7 .

Further, the rear end of the shifting plate 20 can be connected to the outer end of the material guide plate 16, and the denitrification agent that slides to the rear end of the shifting plate 20 enters the material guide plate 16 from the connection, and then is guided by the material guide plate 16 Feed bin blanking hole 8 is more convenient for the blanking of feed bin blanking hole 8.

Conventional dry denitrification equipment in the prior art includes a vertically fixed silo, in which the denitrification agent is stored, and a star-shaped unloading valve or a feeder with a similar structure is installed at the bottom of the silo, through which the denitrification agent falls to the feeder. Temporary storage in the Venturi tube below the warehouse. The Venturi tube is connected to the conveying pipeline, and the pressure air is provided by the fan, and the denitrification agent temporarily stored in the Venturi tube is blown into the boiler along the conveying pipeline, and the denitrifying material undergoes a reduction reaction with nitrogen oxides inside the boiler to perform denitrification.

Since the Venturi tube of conventional dry denitrification equipment is connected to the silo, there is a problem of return air. When the equipment is running, the pressure air in the Venturi tube will enter the silo in reverse, blowing the denitration agent upwards, resulting in intermittent feeding, affecting the denitration effect and causing nitrogen oxides to exceed the standard. When the equipment is out of operation, especially in summer, the air humidity is high, and the humid air returning to the wind causes the material to absorb water and harden and cannot be discharged.

In order to solve the air return problem of the existing dry denitrification equipment, the unloading device 100 provided by the present invention includes a first-stage unloading tray 1, a second-stage unloading tray 2 and The third stage blanking tray 3, the first stage blanking tray 1, the second stage blanking tray 2 and the third stage blanking tray 3 are closely attached to each other, as shown in Figures 10, 13, 14, 16.

The first-stage blanking tray 1, the second-stage blanking tray 2, and the third-stage blanking tray 3 are respectively provided with a first set of blanking holes 4, a second set of blanking holes 5, and a third set of blanking holes 6 , the first set of blanking holes 4, the second set of blanking holes 5 and the third set of blanking holes 6 run through the first-stage blanking tray 1, the second-stage blanking tray 2, and the third-stage blanking tray 3 respectively. thickness direction.

The relative rotation between the first-stage blanking tray 1, the second-stage blanking tray 2 and the third-stage blanking tray 3, when the relative rotation reaches the first group of blanking holes 4 communicate with the second group of blanking holes 5, The second group of blanking holes 5 do not communicate with the third group of blanking holes 6. When the relative rotation to the second group of blanking holes 5 communicates with the third group of blanking holes 6, the first group of blanking holes 4 and the second The group blanking holes 5 are not connected.

When in use, the denitration agent enters the first group of discharge holes 4 from the feed hole 8 of the feed bin 7 . When it is relatively rotated until the first group of feeding holes 4 communicate with the second group of feeding holes 5 , the denitration agent enters the second group of feeding holes 5 from the first group of feeding holes 4 . Now the second group of blanking holes 5 are not connected with the third group of blanking holes 6, and the wind force of blowing the denitrification agent after the blanking at the rear of the third stage blanking tray 3 is blocked by the third stage blanking tray 3, and the wind force is not enough. Will go into bin 7.

When relative rotation to the second group of feeding holes 5 communicates with the third group of feeding holes 6, the denitration agent enters the third group of feeding holes 6 from the second group of feeding holes 5, and passes through the third group of feeding holes 6 It enters the subsequent feeder 11, discharge pipe 67, etc., and is blown into the boiler by wind force, where denitrification reaction occurs and nitrogen oxides are removed. Now the first group of blanking holes 4 are not connected with the second group of blanking holes 5, and the first stage blanking tray 1 blocks the wind power outside the feed bin 7, and the wind power will not enter the feed bin.

In the present invention, during the rotation process of the three feeding trays, the denitration agent is transferred step by step along with the three sets of feeding holes of the three feeding trays, so that the smooth feeding of materials is realized. Since the first set of blanking holes 4, the second set of blanking holes 5 and the third set of blanking holes 6 will not all communicate with each other, the wind will not return to the feed bin 7 through the three sets of blanking holes, completely solving the problem. Solved the return air problem of dry denitrification equipment blanking. Then it solves the problem of intermittent and stuck feeding caused by the return air, ensures the smooth feeding, and then ensures that the nitrogen oxides meet the standards, and solves the problem that the wet air of the return air causes the denitrification material to absorb water and harden and cannot be discharged. question.

The surfaces in contact with each other between the three feeding trays are close together, which does not affect the rotating feeding, but also ensures tight contact and no material leakage, which can prevent the wind from returning from the gap between the three feeding trays, and can also It prevents the denitration material in the three sets of feeding holes from entering between the two feeding trays, avoids the wearing of the feeding trays and facilitates cleaning.

The present invention does not limit the specific arrangement of each group of blanking holes. In one example, the silo blanking holes 8, the first group of blanking holes 4, the second group of blanking holes 5 and the third group of blanking holes 6 They are respectively distributed evenly on the circle with the center of radius R taking the center of the rear end of the silo 7, the center of the first-stage unloading tray 1, the second-stage unloading tray 2, and the third-stage unloading tray 3. After the feed bin 7, The centers of the end, the first-level blanking tray 1, the second-level blanking tray 2 and the third-level blanking tray 3 are all located on the central axis of the feed bin 1.

For example, there are 3 feeding holes 8 , the first group of feeding holes 4 , the second group of feeding holes 5 and the third group of feeding holes 6 . The diameters of the feeding hole 8, the first group of feeding holes 4, the second group of feeding holes 5 and the third group of feeding holes 6 are all 20-50 mm, preferably 40 mm. The radius of the circumference of the distribution of each group of feeding holes is 60-80 mm, preferably 70 mm.

The specific method of the present invention to realize that the three groups of feeding holes are not all connected at all times includes: the first-level feeding tray 1 and the third-level feeding tray 3 are fixed, and the second-level feeding tray 2 is fixed with the central axis of the bin 7 For the rotation of the rotating shaft, the first group of blanking holes 4 and the third group of blanking holes 6 are set in a staggered manner.

Since the first-stage blanking tray 1 and the third-stage blanking tray 3 are fixed, the relative positions of the first set of blanking holes 4 and the third set of blanking holes 6 will not change, while the first set of blanking holes 4 and the third group of blanking holes 6 are set in a staggered manner, not straight through, for example staggered by 60°. Therefore, when the second stage blanking tray 2 rotates, if it rotates until the first set of blanking holes 4 communicate with the second set of blanking holes 5, the second set of blanking holes 5 and the third set of blanking holes 6 must not be separated. connected. Similarly, when rotating to the point that the second group of material holes 5 communicates with the third group of material holes 6, the second group of material holes 5 must not communicate with the first group of material holes 4. Thereby realized the purpose that three groups of blanking holes are not all interlinked all the time.

Also can be provided with feed bin follow-up feed tray 9 between the first stage lower tray 1 and feed bin 7 rear ends, feed bin follow-up feed tray 9 is fixed on the rear end outer surface of feed bin 7, feed bin follows The surfaces that are in contact with each other between the movable blanking tray 9 and the first stage blanking tray 1 are closely attached together, as shown in FIGS. 13 , 14 , and 16 .

A group of follow-up feeding holes 10 are provided on the feeding bin follow-up feeding tray 9, the feeding bin feeding holes 8, the following feeding feeding holes 10 and the second group of feeding holes 5 are aligned, and the feeding bin 7 and the feeding bin follow the Both the movable blanking tray 9 and the second stage blanking tray 2 rotate synchronously with the central axis of the feed bin 7 as the rotating shaft.

During the rotation process of the silo 7, the follow-up blanking tray 9 and the second-stage blanking tray 2, the silo blanking hole 8, the follow-up blanking hole 10 and the second group of blanking holes 5 are not fixed to each other. When the moving first group of feeding holes 4 are connected, the denitration agent enters the second group of feeding holes 5 from the silo 7, and will not continue to fall when it is blocked by the third-stage feeding tray 3, and the third-stage feeding tray 3 Block the wind to prevent return wind. When continuing to rotate, when the silo discharge hole 8, the follow-up discharge hole 10 and the second group of discharge holes 5 communicate with the fixed third group of discharge holes 6, the denitrification agent will flow from the second group of discharge holes. 5 into the third group of blanking holes 6, and now the wind was blocked by the first stage blanking tray 1 to prevent return wind.

Therefore, in the process of rotation, the silo feeding hole 8, the follow-up feeding hole 10, the first group of feeding holes 4, the second group of feeding holes 5 and the third group of feeding holes 6 and the five groups of feeding holes are always It will not be straight and straight at the same time, which completely solves the problem of return wind.

The contact surfaces of the silo follow-up blanking tray 9, the first-stage blanking tray 1, the second-stage blanking tray 2 and the third-stage blanking tray 3 are made of polytetrafluoroethylene. The PTFE material is oil-resistant, heat-resistant and self-lubricating, making it durable and ideal for surfaces where the feeding trays rotate against each other.

All the feeding trays can be made of polytetrafluoroethylene, or only the contact surface can have a layer of polytetrafluoroethylene, which saves cost.

The silo follow-up lower tray 9 needs to be fixed on the outer surface of the rear end of the silo 7 and rotate together with the silo 7. In order to achieve this purpose: a group of limiting plates 40 are arranged on the outer surface of the rear end of the silo 7. One group of limiting plates 40 forms a limiting groove 41, the edge of the limiting groove 41 has a first group of limiting planes 42, a second group of limiting planes 43 is arranged on the outer periphery of the feeding bin following the lower tray 9, and the feeding bin follows the The movable lower tray 9 is located in the limit groove 41, so that the surface of the front end of the movable lower tray 9 of the feed bin is attached to the rear end outer surface of the feed bin 7, and the second group of limit planes 43 are aligned with the first set of limit planes. Plane 42 cooperates to limit.

Concretely, the cross-section of the silo follow-up feeding tray 9 is octagonal, the limit plate 40 is a triangular plate, and the four triangular plates are evenly distributed at a certain distance, and a limit groove 41 is formed in the middle, and the hopper follow-up feeding tray The plane of the outer periphery of 9 cooperates with the plane of the limiting plate 40 to limit.

The center of the outer surface of the rear end of the feed bin 7 is fixedly provided with a feed bin shaft sleeve 44 extending to the obliquely rear bottom. The feed bin shaft sleeve 44 is welded to the rear end of the feed bin 7. The central axes of the feed bin 7 are coincident, and the feed bin follows the feed tray 9, the first-stage feed tray 1 and the second-stage feed tray 2 to pass through the feed bin shaft sleeve 44 through the through holes in the respective centers, such as Shown in Figures 13, 14, and 16.

Wherein, the first-stage unloading tray 1 is not connected with the hopper bushing 44, so that the first-stage unloading tray 1 is fixed. The second-stage unloading tray 2 is connected on the hopper bushing 44 through a follow-up structure, so that the second-stage unloading tray 2 rotates synchronously with the hopper bushing 44, that is, the feed bin 7, the feed bin bushing 44, the feed bin The follow-up blanking tray 9 and the second stage blanking tray 2 rotate synchronously.

A pressure plate 45 is arranged on the oblique rear lower side of the second stage unloading tray 2, and the pressure plate 45 is sleeved on the hopper bushing 44, and an external thread is arranged on one side of the rear end of the hopper bushing 44, and a band is screwed on the external thread. The nut 47 of the washer 46, the silo bushing 44 between the pressure plate 45 and the washer 46 is covered with a lower material tray compression spring 48, and the two ends of the lower material tray compression spring 48 respectively stand on the pressure plate 45 and the washer 46 The upper and lower tray compression springs 48 apply pressure, and the second-stage tray 2, the first-stage tray 1 and the bin follow-up tray 9 are pressed against the rear end of the bin 1 through the pressure plate 45 On the outer surface, the surfaces of the three blanking trays are tightly attached together. The pressing force of the blanking tray pressing spring 48 can be adjusted through the nut 47, thereby adjusting the tightness between the three blanking trays.

The aforementioned follow-up structure can include a keyway 49 and a key 50, the keyway 49 is provided on the silo bushing 44, and the key 50 can be arranged in the through hole at the center of the second-stage feeding tray 2, through the cooperation of the keyway 49 and the key 50 , so that the secondary feeding tray 2 rotates synchronously with the silo bushing 44 .

Or, the follow-up structure includes a keyway 49 and a key 50, the keyway 49 is provided on the hopper bushing 44, the key 50 is arranged in the through hole at the center of the pressure plate 45, and the pressure plate 45 is connected to the second-stage unloading tray 2 through a pin 51. Fixed connection.

In this way, through the above-mentioned structures such as the hopper bushing 44, the pressure plate 45, the nut 47, the blanking tray compression spring 48 and the washer 46, the second-stage blanking tray 2, the first-stage blanking tray 1 and the material The warehouse follow-up feeding tray 9 is assembled with the material bin 7 . Then the third stage blanking tray 3 can be assembled again.

When assembling the third-stage blanking tray 3, the central portion of the surface of the rear end of the second-stage blanking tray 2 can have a circular boss 52 protruding obliquely backward and downward, and the pressure plate 46 is pressed on the circular boss 52, The third stage blanking tray 3 is sleeved on the outer periphery of the circular boss 52 through the through hole in its own center, so as to realize the assembly of the third stage blanking tray 3 . At this time, the thickness of the third-stage blanking tray 3 is equal to the thickness of the circular boss 52 to ensure that the surface where the rear end of the third-stage blanking tray 3 is located is smooth.

Or, the second stage blanking tray 2 does not have the circular boss 52, the pressure plate 45 can be directly pressed on the surface of the second stage blanking tray 2 rear end, and the third stage blanking tray 3 passes through the through hole in its own center. Covered on the outer periphery of the pressure plate 45, the assembly of the third stage blanking tray 3 is realized. At this time, the thickness of the third-stage blanking tray 3 is equal to the thickness of the pressure plate 45, so as to ensure that the surface where the rear end of the third-stage blanking tray 3 is located is smooth.

The blanking device 11 is arranged on the oblique rear lower side of the third-stage blanking tray 3. As shown in FIG. The top end and the bottom end are connected with the inlet pipe 66 and the discharge pipe 67 respectively. The denitration agent enters the blanking channel 53 from the third group of blanking holes 6 and the blanking device blanking hole 54 . The pressure air provided by the fan 12 is blown into the discharge pipe 67 from top to bottom through the air intake pipe 66, and the pressure air pushes the denitration agent in the blanking channel 53 into the discharge pipe 67 below, and then is transported into the boiler along the discharge pipe 67 .

The third stage blanking tray 3 is fixed on the outer surface of the front end of the blanking device 11, and the front end of the blanking device 11 is provided with a blanking device blanking hole 54, and the blanking device blanking hole 54 is connected with the third group of blanking holes. 6 aligned, the denitration agent enters the blanking channel 53 of the blanking device 11 from the third group of blanking holes 6 through the blanking hole 54 of the blanking device, and then is blown into the boiler along the pipeline by wind force.

The diameters of the blanking device blanking hole 54, the third group of blanking holes 6, the second group of blanking holes 5, the first group of blanking holes 4, the follow-up blanking holes 10 of the feed bin and the blanking holes 8 of the feed bin are the same, and each is distributed on a circle of the same radius R.

The middle part of the front end of the blanking device 11 is provided with a through hole, and the structure (such as the rear portion of the bin bushing 44, the pressure plate 45, the lower tray compression spring on the surface of the third-level blanking tray 3 rear end) is obliquely below. 48, washers 46, nuts 47 and other structures) are stretched into the blanker 11 from the through hole, ensuring that the surface of the third stage blanking tray 3 rear end is attached to the front end outer surface of the blanker 11.

A bin support 30 is arranged below the bin 7, and the bin 7 is obliquely arranged on the bin bracket 30. The lower side of the blanking device 11 is provided with a blanking device fixing seat 55. As shown in Figure 20, the feeding device fixing seat 55 has a square body cavity 56 with an open front end, and the bottom end of the feeding device fixing seat 55 is obliquely fixed. On the bin support 30 , the unloading device 100 and the feeder 11 extend into the cuboid cavity 56 from the opening at the front end of the cuboid cavity 56 , and the feeder 11 is fixed on the feeder holder 55 .

The silo 7 is arranged obliquely, and has a tendency to move to the lower side after the slant under the action of gravity, and the feeder holder 55 is fixed to limit the movement of the silo 7 to the lower side after the slant. Under the action of gravity, the silo 7 presses the contact surface of the second-level blanking tray 2 and the third-level blanking tray 3 tightly by the cooperation of the blanker fixing seat 55, and the third-level blanking tray 3 is pressed on the feeder 11.

The first-stage blanking tray 1 and the third-stage blanking tray 3 need to be fixed and do not rotate together with the feed bin 7. To achieve this purpose: A third group of limiting planes 57 is provided, and a fourth group of limiting planes 58 is provided on the outer periphery of the left and/or right sides of the third-level blanking tray 3. The third group of limiting planes 57 and the fourth group of limiting planes The positioning plane 58 cooperates with the left side wall 59 and/or the right side wall 60 of the blanking device fixing seat 55 to limit the position, that is, the first-level blanking tray 1 and the third-level blanking tray 3 are locked by the blanking device fixing seat 55 Can't move.

In order to install the blanker 11 on the blanker fixed seat 55, the rear end of the blanker 11 is provided with a blanker installation shaft 62 extending obliquely rearward and downward, and the blanker installation shaft 62 extends from the blanker fixed seat. The through hole that offers on the rear end of 55 stretches out the feeder holder 55 to the obliquely rear bottom, and the feeder mounting shaft 62 is provided with a spherical washer 63 between the feeder 11 and the feeder holder 55. Under the action of gravity of the silo 7 , the feeder 11 is tightly attached to the feeder fixing seat 55 through the spherical washer 63 .

A support baffle 65 is fixedly arranged on the outer surface of the rear end of the feeder holder 55, and the support baffle 65 is located below the feeder installation shaft 62, and can be connected with the feeder holder 55 by bolts. The fixed position of the support baffle 65 is adjustable up and down, and the support baffle 65 clamps the feeder installation shaft 62 in a proper position in the up and down direction, thereby clamping the feeder 11 in the up and down direction. At this time, it is required that the mounting holes of the supporting baffle 65 and the blanking device fixing seat 55 and the through hole for accommodating the feeding device mounting shaft 62 on the feeding device fixing seat 55 are elongated holes in the up and down direction, so as to realize the support of the supporting baffle 65. The position is adjustable and the feeder mounting shaft 62 is stuck in place.

The part of the feeder mounting shaft 62 protruding from the feeder holder 55 is covered with a feeder fixing nut 64 , and the feeder fixing nut 64 tightens the feeder 11 and the feeder holder 55 and is connected. The blanker fixing seat 55 can be set independently, and can also be set in cooperation with the supporting baffle plate 65 .

The present invention does not limit the specific structural form of the driving device, as long as the tilting rotation of the feed bin 7 can be realized, in one example, the driving device includes a motor 14 and a plurality of support wheels 13 arranged on the feed bin bracket 30. Four support wheels 13 have formed a support frame, and feed bin 7 is inclinedly arranged on a plurality of support wheels 13. And the lower part of the side wall of the feed bin 7 is in contact with the outer peripheral surface of the support wheel 13, the motor 14 is connected with some or all of the plurality of support wheels 13, and the support wheel 13 connected with the motor 14 is driven by the motor 14 to pass through the support wheel. The outer circumference of 13 rubs against the side wall of the material bin 7, and drives the material bin 7 to rotate around its own central axis as a rotating shaft in a frictional manner.

The motor 14 can be a frequency conversion deceleration motor, and the rotational speed of the feed bin 7 is regulated by a frequency converter through the frequency conversion deceleration motor, thereby adjusting the feeding amount. The variable frequency deceleration motor is equipped with a reducer. For example, the power of the variable frequency deceleration motor is 3 to 5kw, the deceleration range of the reducer is between 1:10 and 1:60, the frequency conversion speed regulation range is between 10Hz and 60Hz, and the output speed is 9.6～172.8r/min, the speed range of the silo is 1.1～6.6r/min, and the feeding speed of the silo is 100～660Kg/day.

Wherein, a plurality of support wheels 13 can be distributed on the left and right sides below the side wall of the feed bin 7, and the rotation axes of the plurality of support wheels 13 are arranged obliquely and parallel to the central axis of the feed bin 7, so as to realize the rotation of the feed bin 7 along its rotation axis. Spins smoothly. The motor 14 is connected with the support wheel 13 on the left side or the right side below the side wall of the feed bin 7, the support wheel 13 on this side is a driving wheel, and the support wheel 13 on the other side is a driven wheel.

Further, a plurality of support wheels 13 are symmetrically distributed on the left and right sides below the side wall of the silo 7, and there are at least two support wheels 13 on the left and right sides below the side wall of the silo 7. All the support wheels 13 on one side are connected together by transmission shafts 21 .

The top of the side wall of the feed bin 7 is provided with a pinch wheel 22, the pinch wheel 22 is arranged on the pinch wheel bracket 23, the pinch wheel bracket 23 is fixed on the feed bin bracket 30, and the rotation axis of the pinch wheel 22 is arranged obliquely and with the side of the feed bin 7. The central axis is parallel, and the bottom of the outer peripheral surface of the pressure roller 22 is pressed against the top of the side wall of the feed bin 7 .

The feed bin 7 is compressed from multiple directions by the supporting wheel 13 and the pressing wheel 22, so that the feed bin 7 can only be rotated along its central axis, and the feed bin 7 is prevented from shaking up, down, left, and right.

The pressure wheel bracket 23 includes two columns 24 and a beam 25, the two columns 24 are located on the left and right sides of the feed bin 7, the beam 25 is located above the side wall of the feed bin 7 and is connected with the two columns 24 to form a gantry structure . In one example, the gantry structure is arranged obliquely, and the plane where the gantry structure is located is perpendicular to the central axis of the silo 7 .

The top of the side wall of the silo 7 is provided with a pinch roller mounting rod 26, the pinch roller 22 is installed on the pinch roller mounting rod 26, the pinch roller mounting rod 26 is located below the crossbeam 25 and the pinch roller mounting rod 26 is movably installed on the column 24. A pressing mechanism is arranged between the pressure roller mounting rod 26 and the crossbeam 25 to press down the pressure roller mounting rod 26 so that the bottom of the peripheral surface of the pressure roller 23 is pressed against the top of the side wall of the feed bin 7 . Compression mechanism 27 is elastic compression, can be structures such as compression spring, and its compression force is adjustable, thereby regulates the compression force of pressure roller 22 to feed bin 7 sidewalls.

Specifically, the first end of the pressure roller mounting rod 26 is rotatably connected to a column, for example, in a hinged manner. The second end of the pinch roller installation rod 26 can slide relative to another column, the compression spring is positioned at the second end of the pinch roller installation rod 26, and the lower end and the upper end of the compression spring 26 are connected with the pinch roller installation rod 26 and the crossbeam respectively. 25 is connected, the second end of the pinch roller installation rod 26 is pressed down under the elastic force of the compression spring, thereby the outer peripheral surface bottom of the pinch roller 23 is compressed on the side wall top of the feed bin 7 .

Each of the aforementioned support wheels 13 may include a plurality of support wheel units arranged side by side to increase the axial size of the support wheels 13 and increase the contact area with the bin 7 . The outer peripheral surfaces of the support wheel 13 and the pressure wheel 22 are provided with materials that increase friction, such as rubber.

In the prior art, a material level motor is provided on the silo, and when the denitrification agent in the silo is less than the set value, an alarm is given, and material is automatically or manually loaded to the silo according to the alarm. However, the alarm structure of the material level motor is complex and not sensitive enough. In order to solve the problems existing in the use of material level motors in the prior art, and realize sensitive and accurate automatic feeding of the silo through a simple structure, an implementation method of the present invention is as follows:

As shown in Figure 12, a weighing device 31 is arranged below the feed bin support 30, and the weighing device 31 is arranged on the base 61, and the feed bin support 30 is positioned on the weighing device 31, and the weighing device 31 weighs the feed bin support 30 and For the total weight of each structure on it, the weighing device 31 is connected with the feeding equipment 74 and 75 through electrical signals.

When the weight measured by the weighing device 31 was less than the set minimum value (i.e. when the denitration agent in the feed bin 7 was insufficient), the weighing device 31 sent a feeding signal to the feeding equipment 74,75 to control the feeding equipment 74,75 Start to run, feed material to silo 7. During loading, when the weight measured by the weighing device 31 is greater than the set maximum value (i.e. when feeding to the feed bin 7 is sufficient), the heavy device 31 sends a signal to the feeding equipment 74, 75 to finish feeding, and the feeding equipment 74 , 75 stop running, no longer feeding to feed bin 7.

For example, the weighing device 31 outputs two level signals, one is a low level signal of 50 kg, and the other is a high level signal of 300 kg. When the control system receives the low level signal of 50 kg, the feeding devices 74 and 75 are powered on Material, when the denitration agent in the feed bin 7 reaches 300 kilograms, the weighing mechanism 31 outputs a high signal, and now the control system cuts off the power to the feeding equipment 74,75, and stops feeding.

Another way to realize automatic loading is:

As shown in Figure 15, a balance shaft 32 is arranged below the bin bracket 30, the balance shaft 32 is horizontally arranged on the base 61 and is perpendicular to the central axis of the bin 7, the bin bracket 30 is installed on the balance shaft 32 and the bin The bracket 30 can swing back and forth along the balance shaft as an axis.

The position of the balance shaft 32 should be properly close to the rear end side of the silo 7. Specifically, the position of the balance shaft 32 is set so that when the weight of the denitration agent in the silo 7 exceeds the first set value, the silo support 30 will The rear end of feed bin 7 swings in the direction of sinking. And the position setting of the balance shaft 32 should also be such that when the weight of the denitration agent in the silo 7 is less than the second set value, the silo support 30 swings in the direction in which the front end of the silo 7 sinks. wherein the second set value is smaller than the first set value;

That is to say, when the denitration agent in the silo 7 is sufficient, the rear end of the silo 7 tends to sink, and when the denitration agent in the silo 7 is insufficient, the front end of the silo 7 tends to sink.

One of the front and rear sides of the balance shaft 32 is provided with a first limit switch 33, the first limit switch 33 is installed on the base 61 and is located below the bin support 30, the first limit switch 33 communicates with the upper limit switch through an electrical signal. Material equipment 74,75 is connected.

Taking the first limit switch 33 located on the front side of the balance shaft 32 as an example, when the denitration agent in the silo 7 is sufficient, the rear end of the silo 7 sinks to the lowest position, and the front end of the silo 7 lifts up to the highest position. position, at this time, the bin support 30 does not contact the first limit switch 33, the first limit switch 33 does not send an electrical signal, and the feeding equipment 74, 75 does not work.

When the denitration agent in the silo 7 is insufficient, the front end of the silo 7 sinks, so that the silo bracket 30 triggers the first limit switch 33 downward, and the first limit switch 33 sends an electric signal to the feeding device, and the feeding device 74,75 start loading work. After loading to a sufficient amount, the rear end of the feed bin 7 sinks, the feed bin support 30 is separated from the first limit switch 33, and the feeding equipment 74, 75 stops working.

When the first limit switch 33 is located at the rear side of the balance shaft 32, its working process is similar and will not be repeated here.

When the feed bin support 30 swings back and forth, it will pull the intake pipe 66 and the discharge pipe 67. The present invention sets the intake pipe 66 and the discharge pipe 67 as steel wire hoses, which can swing with the feed bin support 30 to prevent being Pull to destroy.

Further, as shown in FIG. 17 , the other side of the front and rear sides of the balance shaft 32 can also be provided with a second limit switch 34 , and the second limit switch 34 is installed on the base 61 and located below the bin support 30 , the second limit switch 34 is connected with the feeding equipment 74, 75 through an electrical signal. That is, the first limit switch 33 and the second limit switch 34 are located on the front and rear sides of the balance shaft 32 respectively, and the start or stop of feeding is controlled by the two limit switches. When the denitration agent is insufficient, when the front end of the silo 7 sinks and triggers a limit switch, feeding starts. When the feeding is sufficient, the rear end of the silo 7 sinks and triggers another limit switch, and the feeding ends. So cycle.

Or, as shown in Figure 15, the other side in the front and rear sides of the balance shaft 32 can also be provided with a support block 35, the support block 35 is installed on the base 61 and is positioned at the bottom of the silo support 30, for the silo support 30 provides support. Preferably, the support block 35 is located on the rear side of the balance shaft 32. Since the rear end of the bin 7 sinks most of the time, if a limit switch is set, it will be easily crushed for a long time, so it is only on the front side of the balance shaft 32. A limit switch is set, and a support block 35 is set on the rear side of the balance shaft 32 to provide long-time support for the feed bin support 30 rear side.

The rear end of the feed bin 7 is connected with a counterweight located outside the feed bin 7, and the feeding amount of the feeding devices 74 and 75 is adjusted by the counterweight 36. When the counterweight 36 is lightened, each feeding more, and vice versa. The counterweight 36 can be arranged on the part of the blanker installation shaft 62 protruding from the blanker fixing seat 55 , that is, on the end of the blanker installation shaft 62 .

The bin support 30 can include an inclined plane structure 36 and a planar structure 37. The bin 7, the motor 14, the support wheel 13, and the pressure wheel bracket 23 are all arranged on the inclined plane structure 36. The inclined plane structure 36 provides a suitable inclination angle for the bin 7. The planar structure 37 is connected below the inclined-plane structure 36, and is used to cooperate with the weighing device 31, the balance shaft 32, the feeder fixing seat 55 and the limit switch.

The wall of the silo 7 is provided with an insulating layer 38. Specifically, the insulating layer 38 can be arranged on the inner surface of the rear end, the inner surface of the front end and the inner surface of the side wall of the silo 7, and an electric heating pipe 39 is arranged in the insulating layer 38. The insulation layer 38 and the electric heating pipe 39 can prevent dew condensation from causing hardening of the denitrification agent. The power of the electric heating tube is selected to be 11kW, and the temperature control range is set arbitrarily from 15 to 65°C.

In the present invention, the shape of the feed window 15 can be circular, and the feed window 15 is provided with a sieve 28, the sieve 28 is a cylindrical structure with an open front end, and the rear end and the side of the sieve 28 Sieve holes are provided, as shown in Figure 18. The front end of the sieve device 28 is connected on the feed window 15, and the rear end and the side of the sieve device 28 stretch into the feed bin 7.

On the one hand, the sieve device 28 can intercept large particles of impurities in the denitration agent added to the silo 7 . On the other hand, if there are agglomerates in the added denitrification agent, the agglomerated denitrification agent collides and rubs against the sieve material device 28 with the rotation of the feed bin 7 in the sieve material device 28, thereby breaking up the agglomerate. Finally, if there is an agglomerate that cannot be broken all the time, it can be taken out from the sieve device 28 to prevent the agglomerate from entering the material 7 and affecting the blanking.

For the convenience of the connection of the sieve device 28, several connecting plates 29 are provided on the outer periphery of the front end of the sieve device 28, and the connecting plates 29 stretch out the outer periphery of the front end of the sieve device 20, and the connecting plates 29 are connected to the feeding window by bolts. 15 on the feed bin 7 of the periphery, that is, be fixed on the outer surface of the front end of the feed bin 7.

The power source of the wind power transmission is provided by the fan. The fan 12 can be a Roots blower, a centrifugal fan, an air compressor, etc. The fan 12 is connected with a three-phase motor 68 to provide driving force for the fan. The fan 12 and the three-phase motor 68 are arranged on the fan support 69, and the fan support 69 is fixedly installed on the base 61, as shown in Fig. 1-4. In one example, the flow rate of the Roots blower is 5.5m3/min, the boost pressure is 58.8Kpa, and the power of the three-phase motor is 11kW.

The present invention also has an electrical box 70, and the electrical box 70 is fixedly installed on the base 61 through the electrical box bracket 71, as shown in FIG. 4 . The control lines of the three-phase motor 68 and the motor 14, the output signals of the weighing device 31, the first limit switch 33 and the second limit switch 34, and the control circuits of the feeding equipment 74, 75 are all integrated in the electrical box 70 In, programmed control runs automatically. Wireless transmission components can be installed in the electrical box 70 to realize mobile phone control and remote computer control.

The electrical signals of the weighing device 31, the first limit switch 33 and the second limit switch 34 are received through the electrical box 70, and then the electrical box 70 controls the opening of the feeding equipment 74, 75 through the control circuit of the feeding equipment 74, 75 with off.

The present invention also has protective cover 72, feed bin 7, blanking device 100, feeder 11, fan 12 and electrical box 70 and other various supporting structures are all arranged in protective cover 72, to protect the internal structure. The protective cover 72 is fixed on the base 61, and an inspection door is opened on the protective cover 72, which is convenient for maintenance and inspection, as shown in FIG. 4 .

Alternatively, the electrical box 70 can be located outside the protective cover 72 for easy manipulation, as shown in FIG. 3 .

The present invention can also have a muffler 73 connected to the air intake pipe 66 for eliminating the noise generated by the blower fan 12 , and the muffler 73 can be located inside the protective cover 72 , as shown in FIG. 3 .

The size of the protective cover 72 may be 3280*1080*2055mm (length*width*height), and the total weight of the dry denitrification equipment is 2.5 tons.

The feeding devices 74 and 75 may be negative pressure feeding devices 74 (as shown in FIG. 1 ) or screw feeding devices 75 (as shown in FIG. 2 ), which are not limited in the present invention. Taking negative pressure feeding equipment as an example, its dimensions are 2000*2700*2800mm (length*width*height), and its weight is 1.5 tons. It is equipped with a 5-ton hopper, which can be used for about a week after adding a dose of medicine. The hopper has two material level devices, low and high, and both can output alarm signals.

The above description is a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (37)

1. The dry denitration system is characterized by comprising feeding equipment, dry denitration equipment and a boiler, wherein:

the dry denitration device comprises a bin, a blanking device and a fan, wherein the bin is obliquely arranged in a mode that the rear end of the bin faces downwards and the front end of the bin faces upwards, so that the central axis of the bin is obliquely arranged relative to the horizontal direction, and the bin is connected with a driving device for driving the bin to rotate by taking the central axis of the bin as a rotating shaft;

the feeding window is formed in the front end of the bin, a group of bin discharging holes are formed in the rear end of the bin, a feeding hole of the feeding device is communicated with the feeding window, the discharging device is obliquely arranged on the outer surface of the rear end of the bin, the blanking device is obliquely arranged below the oblique rear part of the discharging device, the fan is connected with the blanking device through an air inlet pipe, and the blanking device is connected with the boiler through a discharging pipe.

2. The dry denitration system according to claim 1, wherein a group of guide plates which are matched with a group of feed bin blanking holes one by one are fixedly arranged on the inner surface of the rear end of the bin, and the guide plates are perpendicular to or obliquely arranged on the inner surface of the rear end of the bin;

the inner end of each guide plate extends to the position of a feed bin discharging hole matched with the guide plate, the outer end of each guide plate extends to the outer side direction on the rear end of the feed bin, each guide plate is positioned behind the feed bin discharging hole matched with the guide plate in the rotation direction of the feed bin, and the guide plates guide the denitration agent to the inner side to the position of the feed bin discharging hole.

3. The dry denitration system according to claim 2, wherein the material guide plate is connected with a material baffle near the inner end, the material baffle is located inside the material bin blanking hole, the material baffle and the material guide plate form a V-shaped material blocking structure facing to the outer side at the connection, the material bin blanking hole is located outside the V-shaped material blocking structure, and the V-shaped material blocking structure blocks the denitration agent guided from the material guide plate to the inner side at the material bin blanking hole outside the V-shaped material blocking structure.

4. A dry denitration system according to claim 3, wherein the number of blanking holes and the number of the stock bin and the number of the stock guide plates are all multiple, and each stock guide plate corresponds to a part of the other stock guide plate close to the inner side.

5. The dry denitration system according to claim 2, wherein a stirring plate is fixedly arranged on the inner surface of the side wall of the bin, the front end and the rear end of the stirring plate extend to the front end side and the rear end side of the bin respectively, and a tangent plane at the joint of the stirring plate and the inner surface of the side wall of the bin is mutually perpendicular or inclined to the stirring plate.

6. The dry denitration system according to claim 5, wherein the rear end of the stirring plate is connected with the outer end of the material guiding plate, and the denitration agent sliding to the rear end of the stirring plate enters the material guiding plate from the connection position.

7. The dry denitration system according to any one of claims 1 to 6, wherein the blanking device comprises a first-stage blanking tray, a second-stage blanking tray and a third-stage blanking tray which are obliquely arranged in sequence from the front upper part to the rear lower part, and surfaces of the first-stage blanking tray, the second-stage blanking tray and the third-stage blanking tray, which are in contact with each other, are closely attached;

the first-stage blanking disc, the second-stage blanking disc and the third-stage blanking disc are respectively provided with a first group of blanking holes, a second group of blanking holes and a third group of blanking holes, and the first group of blanking holes, the second group of blanking holes and the third group of blanking holes respectively penetrate through the thickness directions of the first-stage blanking disc, the second-stage blanking disc and the third-stage blanking disc;

The first-stage blanking disc, the second-stage blanking disc and the third-stage blanking disc relatively rotate, when the first-stage blanking disc, the second-stage blanking disc and the third-stage blanking disc relatively rotate until the first-group blanking holes are communicated with the second-group blanking holes, the second-group blanking holes are not communicated with the third-group blanking holes, and when the second-group blanking holes and the third-group blanking holes relatively rotate, the first-group blanking holes are not communicated with the second-group blanking holes.

8. The dry denitration system of claim 7, wherein the bin blanking holes, the first group of blanking holes, the second group of blanking holes and the third group of blanking holes are uniformly distributed on circumferences with the radius R taking the centers of the bin rear end, the first stage blanking disc, the second stage blanking disc and the third stage blanking disc as circle centers, and the centers of the bin rear end, the first stage blanking disc, the second stage blanking disc and the third stage blanking disc are all located on the central axis of the bin.

9. The dry denitration system of claim 8, wherein the first stage blanking tray and the third stage blanking tray are fixed, the second stage blanking tray rotates with a central axis of the storage bin as a rotating shaft, and the first group blanking holes and the third group blanking holes are staggered.

10. The dry denitration system according to claim 9, wherein a bin follower blanking disc is arranged between the first-stage blanking disc and the rear end of the bin, the bin follower blanking disc is fixed on the outer surface of the rear end of the bin, and the surfaces, which are in contact with each other, of the bin follower blanking disc and the first-stage blanking disc are tightly attached together;

the feeding bin is characterized in that a group of follow-up blanking holes are formed in the feeding bin follow-up blanking disc, the feeding bin blanking holes, the follow-up blanking holes and the second group of blanking holes are aligned, and the feeding bin, the feeding bin follow-up blanking disc and the second-stage blanking disc synchronously rotate by taking the central axis of the feeding bin as a rotating shaft.

11. The blanking device of the dry denitration system according to claim 10, wherein the surfaces of the bin follower blanking disc, the first-stage blanking disc, the second-stage blanking disc and the third-stage blanking disc, which are in contact with each other, are made of polytetrafluoroethylene.

12. The dry denitration system of claim 10, wherein a set of limiting plates is arranged on the outer surface of the rear end of the bin, the set of limiting plates form a limiting groove, a first set of limiting planes are arranged on the edge of the limiting groove, a second set of limiting planes are arranged on the periphery of the bin follower blanking tray, the bin follower blanking tray is positioned in the limiting groove, the front end surface of the bin follower blanking tray is attached to the outer surface of the rear end of the bin, and the second set of limiting planes are in matched limiting with the first set of limiting planes.

13. The dry denitration system according to claim 10, wherein a bin shaft sleeve extending obliquely downwards and backwards is fixedly arranged on the center of the outer surface of the rear end of the bin, the central axis of the bin shaft sleeve coincides with the central axis of the bin, and the bin follow-up blanking disc, the first-stage blanking disc and the second-stage blanking disc penetrate through holes formed in the respective centers of the bin shaft sleeve;

the first-stage blanking disc is not connected with the bin shaft sleeve, and the second-stage blanking disc is connected to the bin shaft sleeve through a follow-up structure, so that the second-stage blanking disc synchronously rotates along with the bin shaft sleeve.

14. The dry denitration system according to claim 10, wherein a pressing plate is arranged on the inclined rear lower side of the second-stage blanking disc, the pressing plate is sleeved on the bin shaft sleeve, an external thread is arranged on one side of the rear end of the bin shaft sleeve, a nut with a gasket is screwed on the external thread, a blanking disc compression spring is sleeved on the bin shaft sleeve between the pressing plate and the gasket, and the second-stage blanking disc, the first-stage blanking disc and the bin follow-up blanking disc are compressed on the outer surface of the rear end of the bin through the pressing plate by the blanking disc compression spring, and the compression force of the blanking disc compression spring is regulated by the nut.

15. The dry denitration system of claim 14, wherein the follower structure comprises a key slot and a key, the key slot is formed in the bin shaft sleeve, and the key is arranged in a through hole in the center of the second-stage blanking disc;

or, the follow-up structure comprises a key groove and a key, wherein the key groove is formed in the shaft sleeve of the storage bin, the key is arranged in a through hole in the center of the pressure plate, and the pressure plate is fixedly connected with the second-stage blanking disc through a pin.

16. The dry denitration system according to claim 14, wherein a circular boss protruding obliquely rearward and downward is provided on a surface center portion of a rear end of the second-stage blanking tray, the pressing plate is pressed against the circular boss, and the third-stage blanking tray is sleeved on an outer periphery of the circular boss through a through hole in a center of the third-stage blanking tray;

or the pressure plate is pressed on the surface of the rear end of the second-stage blanking disc, and the third-stage blanking disc is sleeved on the periphery of the pressure plate through a through hole in the center of the third-stage blanking disc.

17. The dry denitration system according to claim 10, wherein the blanking device is arranged on the obliquely rear lower side of the third-stage blanking disc, the blanking device is obliquely arranged, a blanking channel which is obliquely arranged is arranged in the blanking device, and the top end and the bottom end of the blanking channel are respectively connected with the air inlet pipe and the discharging pipe;

The third-stage blanking disc is fixed on the outer surface of the front end of the blanking device, blanking holes of the blanking device are formed in the front end of the blanking device, and the blanking holes of the blanking device are aligned with the third-group blanking holes.

18. The dry denitration system according to claim 17, wherein a through hole is formed in the middle of the front end of the blanking device, the surface of the rear end of the third-stage blanking tray is attached to the outer surface of the front end of the blanking device, and a structure obliquely below and behind the surface of the rear end of the third-stage blanking tray extends into the blanking device from the through hole.

19. The dry denitration system according to claim 17, wherein a bin bracket is arranged below the bin, and the bin is obliquely arranged on the bin bracket; the blanking device is characterized in that a blanking device fixing seat is arranged on the lower side of the oblique rear part of the blanking device, the blanking device fixing seat is provided with a square cavity with an open front end, the bottom end of the blanking device fixing seat is obliquely fixed on the stock bin support, the blanking device and the blanking device extend into the square cavity from the opening of the front end of the square cavity, and the blanking device is fixed on the blanking device fixing seat.

20. The dry denitration system according to claim 19, wherein a third set of limiting planes is arranged on the periphery of the left side and/or the right side of the first-stage blanking tray, a fourth set of limiting planes is arranged on the periphery of the left side and/or the right side of the third-stage blanking tray, and the third set of limiting planes and the fourth set of limiting planes are matched and limited with the left side wall and/or the right side wall of the blanking device fixing seat.

21. The dry denitration system according to claim 19, wherein the bin is of a cylindrical structure, the driving device comprises a motor and a plurality of supporting wheels, the motor and the plurality of supporting wheels are arranged on the bin bracket, the bin is obliquely arranged on the plurality of supporting wheels, the lower part of the side wall of the bin is in contact with the outer peripheral surface of the supporting wheels, the motor is connected with part or all of the plurality of supporting wheels, and the supporting wheels connected with the motor are driven by the motor to drive the bin to rotate in a friction mode by taking the central axis of the bin as a rotating shaft.

22. The dry denitration system according to claim 21, wherein a plurality of supporting wheels are distributed on left and right sides below the side wall of the silo, rotation axes of the plurality of supporting wheels are obliquely arranged and parallel to the central axis of the silo, and the motor is connected with the supporting wheels on the left side or the right side below the side wall of the silo.

23. The dry denitration system according to claim 21, wherein a pressing wheel is arranged above a side wall of the bin, the pressing wheel is arranged on a pressing wheel support, the pressing wheel support is fixed on the bin support, a rotation axis of the pressing wheel is obliquely arranged and parallel to a central axis of the bin, and the bottom of the outer circumferential surface of the pressing wheel is pressed on the top of the side wall of the bin.

24. The dry denitration system according to claim 23, wherein the pinch roller support comprises two upright posts and a cross beam, the two upright posts are positioned on the left side and the right side of the storage bin, and the cross beam is positioned above the side wall of the storage bin and connected with the two upright posts;

the side wall top of feed bin is provided with the pinch roller installation pole, the pinch roller is installed on the pinch roller installation pole, the pinch roller installation pole is located the crossbeam below and pinch roller installation pole movable mounting is in on the stand, the pinch roller installation pole with be provided with between the crossbeam will the pinch roller installation pole pushes down so that the outer peripheral face bottom of pinch roller compresses tightly hold-down mechanism on the lateral wall top of feed bin.

25. The dry denitration system according to claim 24, wherein the first end of the pinch roller mounting bar is rotatably connected to one upright, the second end of the pinch roller mounting bar is slidable relative to the other upright, the pressing mechanism is a pressing spring, the pressing spring is located at the second end of the pinch roller mounting bar, and the lower end and the upper end of the pressing spring are respectively connected to the pinch roller mounting bar and the cross beam, and the second end of the pinch roller mounting bar presses the bottom of the outer circumferential surface of the pinch roller downward on the top of the side wall of the silo under the elasticity of the pressing spring.

26. The dry denitration system according to claim 19, wherein a weighing device is arranged below the bin bracket, the weighing device is arranged on the base, the bin bracket is positioned on the weighing device, and the weighing device is connected with the feeding equipment through an electric signal.

27. The dry denitration system according to claim 19, wherein a balance shaft is arranged below the bin bracket, the balance shaft is horizontally arranged and perpendicular to a central axis of the bin, the bin bracket is mounted on the balance shaft, and the bin bracket can swing back and forth along the balance shaft as an axis;

the balance shaft is arranged at a position such that when the weight of the denitration agent in the storage bin exceeds a first set value, the storage bin bracket swings towards the sinking direction of the rear end of the storage bin; when the weight of the denitration agent in the storage bin is smaller than a second set value, the storage bin bracket swings towards the sinking direction of the front end of the storage bin; the second set value is smaller than the first set value;

one of the front side and the rear side of the balance shaft is provided with a first limit switch, the first limit switch is positioned below the stock bin bracket, and the first limit switch is connected with the feeding equipment through an electric signal.

28. The dry denitration system of claim 27, wherein the air inlet pipe and the discharge pipe are steel wire hoses.

29. The dry denitration system according to claim 27, wherein a second limit switch or a supporting block is arranged on the other side of the front side and the rear side of the balance shaft, the second limit switch or the supporting block is located below the bin bracket, and the second limit switch is connected with the feeding device through an electric signal.

30. The dry denitration system of claim 29, wherein a counterweight located outside the silo is connected to a rear end of the silo.

31. The dry denitration system according to claim 30, wherein a blanking device mounting shaft extending obliquely rearward and downward is provided at a rear end of the blanking device, the blanking device mounting shaft extends obliquely rearward and downward from a through hole provided at a rear end of the blanking device fixing base, and a spherical gasket is provided on the blanking device mounting shaft between the blanking device and the blanking device fixing base.

32. The dry denitration system according to claim 31, wherein a supporting baffle is fixedly arranged on the outer surface of the rear end of the blanking device fixing seat, the supporting baffle is positioned below the blanking device mounting shaft, the fixing position of the supporting baffle is adjustable up and down, and the supporting baffle clamps the blanking device mounting shaft in the up and down direction;

And/or a part of the blanking device mounting shaft extending out of the blanking device fixing seat is sleeved with a blanking device fixing nut, and the blanking device fixing nut is used for screwing the blanking device and the blanking device fixing seat.

33. The dry denitration system of claim 31, wherein the weight is disposed on a portion of the blanking device mounting shaft that extends out of the blanking device mounting base.

34. The dry denitration system according to any one of claims 1 to 6, wherein the feeding window is circular in shape, a sieve is arranged on the feeding window, the sieve is of a cylindrical structure with an open front end, sieve holes are formed in the rear end and the side face of the sieve, the front end of the sieve is connected to the feeding window, and the rear end and the side face of the sieve extend into the bin.

35. The dry denitration system according to any one of claims 1 to 6, wherein an insulating layer is provided on the wall of the silo, and an electric heating tube is provided in the insulating layer.

36. The dry denitration system according to any one of claims 1 to 6, wherein the dry denitration device further comprises a protective cover and an electric box, wherein the storage bin, the blanking device and the fan are arranged in the protective cover, and an access door is arranged on the protective cover.

37. The dry denitration system according to any one of claims 1 to 6, wherein the feeding device comprises a negative pressure feeding device or a screw feeding device.