CN112013405A - Regenerative high temperature oxidation furnace - Google Patents

Abstract

The application provides a heat accumulating type high-temperature oxidation furnace, which comprises a furnace body, wherein a combustion chamber, a first heat accumulating chamber, a second heat accumulating chamber and a third heat accumulating chamber are arranged in the furnace body and are mutually separated, and the heat accumulating chambers are respectively communicated with the combustion chamber; a switching box is arranged on one side of the furnace body, and an air inlet chamber, an air exhaust chamber and a back flushing chamber are formed in the switching box in a separated mode; the air inlet chamber is provided with first air vents which are respectively communicated with the heat storage chambers, and the first air vents are provided with air inlet switching valves; the exhaust chamber is provided with second vents which are respectively communicated with the regenerative chambers, and the second vents are provided with air outlet switching valves; the back-blowing chamber is provided with a third air port which is respectively communicated with the heat storage chambers, and the third air port is provided with a back-blowing switching valve. The structure of heat accumulation formula high temperature oxidation equipment can be simplified to this application, realizes heat accumulation formula high temperature oxidation equipment's integrated production.

Description

Regenerative high temperature oxidation furnace

technical field

The present application relates to the technical field of waste gas treatment, and in particular, to a regenerative high temperature oxidation furnace.

Background technique

Regenerative Thermal Oxidizer (RTO) is a high-efficiency organic waste gas treatment equipment. The principle is to oxidize the combustible waste gas into corresponding oxides and water at high temperature, so as to purify the waste gas and recover the heat released when the waste gas is decomposed.

The existing regenerative high temperature oxidation equipment mainly uses factories to manufacture modules or components, and transports the modules and components to the construction site for assembly, resulting in a complex structure of the existing regenerative high temperature oxidation equipment, and it is difficult to realize automatic production, and The manufacturing process cannot be effectively controlled, the product quality is poor, and the processing efficiency cannot meet the increasing gas emission requirements.

SUMMARY OF THE INVENTION

The present application provides a regenerative high temperature oxidation furnace to simplify the structure of the regenerative high temperature oxidation equipment and realize the integrated production of the regenerative high temperature oxidation equipment.

The application provides a regenerative high temperature oxidation furnace, which includes a furnace body, the furnace body is provided with a combustion chamber and a plurality of mutually spaced apart regenerators, each of the regenerators is respectively connected to the combustion chamber, It is characterized in that,

One side of the furnace body is provided with a switching box, and the switching box is divided into an intake chamber, an exhaust chamber and a backflushing chamber,

The air inlet chamber is provided with first air ports respectively communicating with the regenerators, and the first air port is provided with an air inlet switching valve,

The exhaust chamber is provided with second vents respectively communicating with the regenerators, and the second vent is provided with an outlet switching valve,

The backflushing chamber is provided with third vents respectively communicating with the regenerators, and the third vents are provided with a backflushing switching valve.

Optionally, a plurality of distribution chambers are also formed in the switching box, the distribution chambers and the regenerator chambers are in one-to-one correspondence and communicate with each other, and the first ventilation port is provided between the intake chamber and the between the distribution chambers, the second ventilation port is provided between the exhaust chamber and the distribution chamber, and the third ventilation port is provided between the blowback chamber and the distribution chamber.

Optionally, a plurality of the regenerators are arranged in sequence along the length direction of the furnace body, and a plurality of the distribution chambers are arranged in sequence along the length direction of the furnace body.

Optionally, the intake chamber, the exhaust chamber and the blowback chamber respectively extend along the length direction of the furnace body.

Optionally, along the height direction of the furnace body, the switch box is arranged in a three-layer structure, the distribution chamber is located in the middle layer of the switch box, the intake chamber, the exhaust chamber and the The backflushing chamber surrounds the distribution chamber and is distributed on the upper and lower sides of the distribution chamber.

Optionally, the intake chamber and the blowback chamber are located on the same side of the distribution chamber, and the exhaust chamber is located on the other side of the distribution chamber.

Optionally, the cross section of the distribution chamber is set in a zigzag shape, and the bottom of the distribution chamber extends downward from one side of the furnace body close to the furnace body to form a channel communicating with the regenerator.

Optionally, the switching box is arranged at a lower part of one side of the furnace body, and the switching box is integrated with the furnace body.

Optionally, one side of the furnace body is further provided with an operating platform, the operating platform is located above the switching box, and a gap is provided between the operating platform and the switching box.

Optionally, the regenerative high temperature oxidation equipment further includes:

a bottom plate, arranged at the bottom of the furnace body and the switching box;

an air supply system, installed on the bottom plate, for sending the gas to be treated into the air inlet chamber;

An exhaust system, mounted on the bottom plate, is used to discharge the gas that has completed the treatment.

The technical solution provided by this application can achieve the following beneficial effects:

The regenerative high temperature oxidation equipment provided by the application is provided with a switching box on one side of the furnace body, and the switching box is divided into an intake chamber, an exhaust chamber and a backflushing chamber. The original air intake pipe, exhaust pipe and backflushing pipe are replaced by the chamber, which makes the overall structure simpler and more compact, reduces the size of the space occupied by the regenerative high temperature oxidation equipment, and simplifies the structure of the regenerative high temperature oxidation equipment. It is convenient to realize the integrated production of regenerative high temperature oxidation equipment.

It is to be understood that the foregoing general description and the following detailed description are exemplary only and do not limit the application.

Description of drawings

1 is a schematic structural diagram of a regenerative high temperature oxidation device provided by an embodiment of the application;

Figure 2 is a schematic diagram of the internal structure of the furnace body and the switching box shown in Figure 1;

Fig. 3 is the internal structure schematic diagram of the furnace body shown in Fig. 1;

Fig. 4 is the side view structure schematic diagram of the furnace body and the switching box shown in Fig. 1;

Fig. 5 is the structural representation of the switch box shown in Fig. 1;

Figure 6 is a schematic diagram of the installation structure of the switching valve shown in Figure 5;

FIG. 7 is a schematic three-dimensional structure diagram of the switching valve shown in FIG. 6 .

Reference number:

1- Furnace body;

10 - combustion chamber;

12- regenerator;

120 - the first regenerator;

122 - the second regenerator;

124 - the third regenerator;

14 - combustion system;

140- Combustion fan;

16-Operating platform;

160 - control box;

162 - fence;

164 - ladder;

2- switch box;

20- intake chamber;

200 - the first vent;

202 - air intake;

22 - exhaust chamber;

220 - the second vent;

222 - exhaust port;

24- backflush chamber;

240 - the third vent;

242 - blowback port;

26 - distribution room;

260 - first distribution room;

262 - Second Distribution Room;

264-third distribution chamber; 3-switch valve;

3a- Intake switching valve;

3b-exhaust switching valve;

3c-backflush switching valve;

30 - valve seat;

300 - mounting holes;

300a - sliding bearing;

302-vent;

304 - annular boss;

30a - inner ring;

30b - outer ring;

30c - spokes;

32- valve stem;

34- valve plate;

340 - sealing ring;

342-accommodating slot;

36 - casing;

38 - drive unit;

4- bottom plate;

5- Air supply system;

50-main fan;

6-Exhaust system;

60 - Chimney.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description serve to explain the principles of the application.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application.

In the description of this application, unless otherwise clearly specified and limited, the terms "first" and "second" are only used for the purpose of description, and should not be construed as indicating or implying relative importance; unless otherwise specified or explained , the term "multiple" refers to two or more; the terms "connection" and "fixed" should be understood in a broad sense, for example, "connection" can be a fixed connection, a detachable connection, or an integral Connection, or electrical connection; either directly or indirectly through an intermediary. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the description of this specification, it should be understood that the directional words such as "upper" and "lower" described in the embodiments of the present application are described from the perspective shown in the accompanying drawings, and should not be construed as referring to the embodiments of the present application. limited. Also, in this context, it should also be understood that when an element is referred to as being "on" or "under" another element, it can not only be directly connected "on" or "under" the other element, but also Indirectly connected "on" or "under" another element through intervening elements.

As shown in FIGS. 1-7 , an embodiment of the present application provides a regenerative high temperature oxidation device, which includes a furnace body 1 and a switching box 2 . The furnace body 1 is provided with a combustion chamber 10 and a plurality of mutually spaced regenerators 12. The combustion chamber 10 is located on the top of the regenerators 12, and each regenerator 12 is respectively connected to the combustion chamber 10. The outside of the furnace body 1 can be provided with The combustion system 14 heats and ignites the gas in the combustion chamber 10 through the combustion system 14. The combustion system 14 can be provided with a combustion-supporting fan 140, so that the gas in the combustion chamber 10 can be fully combusted and the treatment efficiency of the exhaust gas is improved; the switching box 2 is arranged in On one side of the furnace body 1 , an intake chamber 20 , an exhaust chamber 22 and a blowback chamber 24 are partitioned and formed in the switching box 2 . Wherein, the air inlet chamber 20 is provided with a first air port 200 which communicates with the regenerators 12 respectively, and the first air port 200 is provided with an air inlet switching valve 3a, and the first air port 200 is opened or closed through the air inlet switching valve 3a; The exhaust chamber 22 is provided with second vents 220 which are respectively connected to the regenerators 12. The second vent 220 is provided with an exhaust switching valve 3b, and the second vent 220 is opened or closed through the exhaust switching valve 3b; The chambers 24 are provided with third vents 240 which communicate with the regenerators 12 respectively. The third vents 240 are provided with a backflush switching valve 3c, and the third vent 240 is opened or closed by the backflush switching valve 3c. In the present application, the intake chamber 20, the exhaust chamber 22 and the backflushing chamber 24 are used to replace the original intake pipe, exhaust pipe and backflushing pipe, so that the overall structure is simpler and more compact, and the occupation of the regenerative high temperature oxidation equipment is reduced. The size of the space simplifies the structure of the regenerative high temperature oxidation equipment and facilitates the realization of the integrated production of the regenerative high temperature oxidation equipment.

Specifically, the regenerative high temperature oxidation equipment provided in the embodiment of the present application further includes an air supply system 5 and an exhaust system 6; The fan 50, the air supply system 5 communicates with the air inlet 202 and sends the gas to be treated into the air inlet chamber 20; , the exhaust system 6 communicates with the exhaust port 222, and discharges the gas discharged from the exhaust port 222 to the outside of the equipment; the backflushing chamber 24 is provided with a backflushing port 242 that communicates with the outside of the switching box 2, and the backflushing port 242 is used for cleaning the equipment. For the remaining harmful gas, the backflushing port 242 can be connected to the air supply system 5 so as to reprocess the gas discharged from the backflushing port 242 to prevent the harmful gas from being discharged to the outside of the equipment.

Wherein, the air inlet 202 , the exhaust port 222 and the blowback port 242 may be provided with connecting flanges to make the connection more convenient. The number of the air inlets 202 can be two, and the two air inlets 202 are located at (or close to) the two ends of the air inlet chamber 20 respectively. The air port 202 is closed by a cover plate, so that the equipment can better adapt to the space installation requirements of the construction site. Correspondingly, the number of the exhaust ports 222 and the blowback ports 242 may be two respectively, the two exhaust ports 222 are located at (or close to) the two ends of the exhaust chamber 22 respectively, and the two blowback ports 242 are located at (or close to) respectively Both ends of the backflush chamber 24 .

Further, the regenerative high-temperature oxidation equipment provided in the embodiment of the present application may also include a bottom plate 4, and the furnace body 1, the switching box 2, the air supply system 5 and the exhaust system 6 are integrated and fixed on the bottom plate 4, so that each part of the equipment is integrated and fixed on the bottom plate 4. The manufacturing and assembly of the equipment can be completed in the manufacturing workshop, which improves the automation level of equipment manufacturing, and can effectively ensure reliable product quality, and enable the equipment to be manufactured and transported as a whole, avoiding the potential safety hazards caused by assembly on the construction site.

Preferably, the switch box 2 is arranged at the lower part of one side of the furnace body 1 to reduce the distance between the switch box 2 and the regenerator 12, so that the switch box 2 can communicate with the bottom of the regenerator 12, so that the gas can be fully Pass through the regenerator 12, and absorb and store the heat of the gas through the regenerator 12; the switch box 2 and the furnace body 1 are arranged as one, so that the structure between the furnace body 1 and the switch box 2 is more compact, thereby reducing the overall size of.

Further, an operating platform 16 is also provided on one side of the furnace body 1 (the side facing the switching box 2 ), and the operating platform 16 is located above the switching box 2 to make full use of the effective space and reduce the overall size of the equipment. The corresponding position of 1 is provided with a control box 160, through which the normal operation of the equipment (for example, the combustion system 14, the switching valve 3, the air supply system 5 and the exhaust system 6, etc.) is controlled, and the operator can board the operation platform 16 to operate In the control box 160, a fence 162 can be set on the edge of the operating platform 16 to ensure the safety of the operator, and an escalator 164 can be set on one side of the operating platform 16 to facilitate the operator to operate the platform 16 up and down; between the operating platform 16 and the switch box 2 A gap is provided to form the installation space of each switching valve 3, so that each switching valve 3 does not exceed the edge of the furnace body 1 and the switching box 2, which further improves the effective utilization of space and reduces the overall size of the equipment.

Further, a plurality of distribution chambers 26 are formed in the switch box 2 separately. The distribution chambers 26 and the regenerator chambers 12 are in one-to-one correspondence and communicate with each other. The second vent 220 is provided between the exhaust chamber 22 and the distribution chamber 26, and the third vent 240 is provided between the blowback chamber 24 and the distribution chamber 26, that is, the intake chamber 20, the exhaust chamber 22 and the The backflushing chambers 24 are all connected to the distribution chamber 26 , and are connected to the regenerator 12 through the distribution chamber 26 , which avoids complicated pipeline connections and further simplifies the internal structure of the switching box 2 .

Further, the plurality of regenerators 12 are arranged in sequence along the length direction of the furnace body 1, the switching box 2 is located on one side of the thickness direction of the furnace body 1, and the plurality of distribution chambers 26 are arranged in sequence along the length direction of the furnace body 1, improving the equipment. The compactness of the overall layout simplifies the connection structure between the switch box 2 and the furnace body 1 .

In a preferred embodiment, the number of the regenerators 12 is three, and the three regenerators 12 are the first regenerator 120 , the second regenerator 122 and the third regenerator 124 respectively; the distribution chamber 26 The number is three, and the three distribution chambers 26 are the first distribution chamber 260 , the second distribution chamber 262 and the third distribution chamber 264 respectively. The three regenerators 12 can communicate with the intake chamber 20 , the exhaust chamber 22 and the blowback chamber 24 through the corresponding distribution chambers 260 respectively, that is to say, the three regenerators 12 are respectively responsible for the intake, exhaust and reaction. Blow, and alternately cycle in turn, fully improve the utilization efficiency of the equipment and the processing efficiency of the gas.

The specific working process is as follows:

In the first working cycle, the first regenerator 120 communicates with the intake chamber 20 through the first distribution chamber 260 , and the gas to be treated passes through the intake chamber 20 , the first distribution chamber 260 and the first storage chamber 20 sequentially through the air supply system 5 . The hot chamber 120 enters the combustion chamber 10 for processing. During this process, there will be residual gas to be treated in the first distribution chamber 260, which needs to be backflushed in the next working cycle to keep the first distribution chamber 260 clean; the second The regenerator 122 communicates with the exhaust chamber 22 through the second distribution chamber 26 , and a part of the gas that has been processed in the combustion chamber 10 enters the exhaust system 6 through the second regenerator 122 , the second distribution chamber 262 and the exhaust chamber 22 in sequence. The third regenerator 124 passes through the third distribution chamber 26 and communicates with the blowback chamber 24, and a part of the gas that has been processed in the combustion chamber 10 passes through the third regenerator 124, the third distribution chamber 264 and the blowback chamber 24 in sequence. Re-enter the air supply system 5 for reprocessing. During this process, the remaining gas to be treated in the third distribution chamber 264 is cleaned up, and exhaust can be performed in the next working cycle.

In the second working cycle, the first regenerator 120 communicates with the blowback chamber 24 through the first distribution chamber 260; the second regenerator 122 communicates with the intake chamber 20 through the second distribution chamber 262; the third heat storage Chamber 124 communicates with exhaust chamber 22 through third distribution chamber 264 .

In the third working cycle, the first regenerator 120 communicates with the exhaust chamber 22 through the first distribution chamber 260; the second regenerator 122 communicates with the blowback chamber 24 through the second distribution chamber 262; the third heat storage Chamber 124 communicates with inlet chamber 20 through third distribution chamber 264 .

In this way, the three working cycles are carried out alternately in turn to achieve continuous and efficient gas treatment.

Further, the intake chamber 20 , the exhaust chamber 22 and the backflushing chamber 24 extend along the length direction of the furnace body 1 respectively, so that the intake chamber 20 , the exhaust chamber 22 and the backflushing chamber 24 can all extend to cover multiple distributions. chamber 26, thereby facilitating communication between the distribution chamber 26 and other chambers.

Further, along the height direction of the furnace body 1, the switch box 2 is arranged in a three-layer structure, the distribution chamber 26 is located in the middle layer of the switch box 2, and the intake chamber 20, the exhaust chamber 22 and the backflushing chamber 24 surround the distribution chamber 26. , distributed on the upper and lower sides of the distribution chamber 26, so that the height and width of the switch box 2 are controlled within an appropriate range, and the overall appearance of a rectangle is formed, the structure of the switch box 2 is simplified, and the size of the switch box 2 is reduced. , so that the communication parts of other chambers (including the intake chamber 20, the exhaust chamber 22 and the blowback chamber 24) and the distribution chamber 26 are located in the same orientation (that is, on the horizontal plane), so that the switching valves 3 can be arranged in the same overall position. In the space, and the reciprocating direction of each switching valve 3 is also in the same direction (ie, along the vertical direction), so that the structure of the device is more compact and the overall volume of the device is reduced.

Further, the cross section of the distribution chamber 26 is set in a zigzag shape, and the bottom of the distribution chamber 26 extends downward from the side close to the furnace body 1 to form a channel connecting the regenerator 12, so that the bottom of the switching box 2 and the furnace body 1 are connected. The bottom is flat, which further makes full use of the limited space and forms a compact communication method.

Further, since the intake chamber 20 and the blowback chamber 24 are both connected to the air supply system 5 , it is preferable that the intake chamber 20 and the blowback chamber 24 are located on the same side of the distribution chamber 26 , and the exhaust chamber 22 is located on the other side of the distribution chamber 26 . side. Among them, the backflushing chamber 24 should have the smallest cross section, so as to avoid excessive gas re-entering the gas supply system 5 for reprocessing, resulting in a decrease in gas processing efficiency.

Preferably, when the cross section of the distribution chamber 26 is set in a zigzag shape, the intake chamber 20 and the blowback chamber 24 are located on the upper side of the distribution chamber 26, and the exhaust chamber 22 is located at the lower side of the distribution chamber 26, preventing the exhaust chamber 22 Compared with the cross-section of the intake chamber 20 , the cross-section of the exhaust chamber 22 is too large, which reduces the effective utilization of the exhaust chamber 22 .

As shown in FIG. 6 and FIG. 7 , the switching valve 3 provided in the embodiment of the present application is installed between two adjacent boxes to control the communication and blocking between the two adjacent boxes, and it includes a valve Seat 30 , valve stem 32 and valve plate 34 . The valve seat 30 is sealingly connected (for example, welded) at the communication hole provided between the two adjacent boxes, and the valve seat 30 provides support and fixation to the switching valve. The center of the valve seat 30 is provided with a mounting hole 300. A vent hole 302 is provided around the mounting hole 300, and the vent hole 302 penetrates the valve seat 30 along the thickness direction of the valve seat 30; the valve stem 32 is slidably connected in the mounting hole, and the valve stem 32 can reciprocate along the axis direction of the valve seat 30; the valve The plate 34 is arranged on one side of the valve seat 30 and forms a sealing pair with the valve seat 30 . The valve plate 34 is connected to the valve stem 32 and drives the valve plate 34 to move along the axis direction of the valve seat 30 through the valve stem 32 , to open or close the vent 302 . In the present application, a sealing pair is formed between the valve seat 30 and the valve plate 34 of the switching valve, so that the switching valve can be independent of the box body, so that the manufacturing accuracy of the switching valve can be easily controlled, the sealing performance of the switching valve can be ensured, and the switching time can be prolonged. service life of the valve.

Specifically, the two adjacent boxes provided in the embodiments of the present application may include a first box board, an intermediate box board, and a second box board that are sequentially spaced along the thickness direction, wherein a space between the first box board and the middle box board is The first box body, the second box body is between the middle box plate and the second box plate, the valve seat 30 is sealingly connected to the middle box plate, and the valve plate 34 is located on the side of the valve seat 30 facing the second box plate.

Wherein, the valve seat 30 and the valve plate 34 are respectively cast parts formed by casting, so that the valve seat 30 and the valve plate 34 have high structural strength and rigidity, so as to avoid deformation or damage of the valve seat 30 or the valve plate 34 during use. , so that the matching precision between the valve seat 30 and the valve plate 34 can be effectively controlled, and the mass production of the switching valve can be realized easily.

Further, in order to prevent the valve stem 32 and the installation hole 300 from being greatly worn, resulting in damage to the valve seat 30, a sliding bearing 300a may be installed in the installation hole 300, and the valve stem 32 and the sliding bearing 300a are slidably matched. That is to say, the sliding bearing 300a is fixed in the mounting hole 300. For example, the two ends of the sliding bearing 300a can be fixed by shaft shoulders and circlips, respectively. The fitting clearance in the mounting hole 300 prevents the valve stem 32 from shaking.

The valve stem 32 can extend away from the valve plate 34 to penetrate the valve seat 30 to reduce the thickness of the valve seat 30, thereby reducing the overall weight of the switching valve; the end of the valve stem 32 away from the valve plate 34 can be connected to The driving device 38 drives the valve stem 32 to reciprocate along the axis direction of the valve seat 30 through the driving device 38 . Preferably, the end of the valve rod 32 away from the valve plate 34 extends to pass through the first box plate, so that the driving device 38 can be located outside the box, so as to prevent the harmful gas in the box from damaging the driving device 38 and facilitate the control of the driving device 38 Of course, the end of the valve rod 32 away from the valve plate 34 may not pass through the first box plate, so that the driving device 38 is located in the box.

Preferably, a sleeve 36 may be provided on the side of the valve seat 30 facing away from the valve plate 34 , and the valve stem 32 is accommodated in the sleeve 36 after passing through the installation hole 300 . That is to say, the sleeve 36 is set as a hollow structure, the sleeve 36 is facing the mounting hole 300, is connected (eg, welded) to the side of the valve seat 30 away from the valve plate 34 and extends in a direction away from the valve plate 34, and the sleeve The pipe 36 can be sealed and connected (such as welding, etc.) to the first box plate, and the switching valve can be further supported and fixed through the sleeve 36, which increases the reliability of the overall installation and fixing of the switching valve, and prevents the connection from loosening during use, resulting in harmful gases. In addition, after the valve stem 32 passes through the installation hole 300, it is inserted into the sleeve 36, the sleeve 36 forms a guide and protects the valve stem 32, and the static seal between the sleeve 36 and the first box plate replaces the The dynamic sealing between the valve stem 32 and the first box plate achieves better sealing performance.

Further, when the valve seat 30 is provided with a sleeve 36 , the driving device 38 can be disposed at the end of the sleeve 36 away from the valve plate 34 , and the end of the valve stem 32 away from the valve plate 34 is connected to the driving device 38 and passes through the driving device 38 Drive the valve stem 32 to move, and provide support for the drive device 38 through the sleeve 36, so that each part of the switching valve has high integration performance, making the switching valve more compact as a whole, and facilitating the mass production of the switching valve.

Further, the valve seat 30 provided in the embodiment of the present application is arranged in a flange-like structure, and the valve seat 30 includes an inner ring 30a, an outer ring 30b, and a plurality of spokes 30c connecting the inner ring 30a and the outer ring 30b; The seat 30 has a smaller thickness and higher structural strength, which increases the reliability of the installation and fixation of the switching valve; on the other hand, the effective area of the vent hole 302 can be increased as much as possible to make the gas flow more smoothly. The inner ring 30a is located at the center position, the mounting hole 300 is arranged in the center of the inner ring 30a, the gap between the adjacent spokes 30c constitutes a vent hole 302, and the valve plate 34 and the outer ring 30b form a sealing pair, so that each vent hole 302 All of them are located within the sealing area of the sealing and matching pair, and the opening and closing of the plurality of vent holes 302 can be realized simultaneously through one sealing and matching pair, which simplifies the overall structure of the switching valve and improves the reliability of the sealing and matching. It can be understood that the valve plate 34 and each vent hole 302 can also form a sealing pair respectively. In this case, the overall structure of the switching valve is complicated, and it is difficult to ensure the consistency of the sealing performance of each vent hole 302 .

Further, the side of the valve seat 30 facing the valve plate 34 may be provided with an annular boss 304 , and a sealing mating pair is formed between the valve plate 34 and the end face of the annular boss 304 to reduce the gap between the valve seat 30 and the valve plate 34 . The contact area forms a targeted sealing and matching area, and the end face of the annular boss 304 can be precisely machined to improve the reliability of the sealing and matching.

Further, at least one annular groove may be provided on the end surface of the annular boss 304, and by providing the annular groove, the end surface of the annular boss 304 is separated to form a plurality of annular sealing surfaces distributed at intervals, thereby further reducing the size of the valve. The contact area between the seat 30 and the valve plate 34, in addition, the multiple annular sealing surfaces form independent multi-channel seals, which can further ensure the reliability of the sealing cooperation.

Preferably, when an annular groove is provided on the end face of the annular boss 304, the cross section of the end face of the annular boss 304 can be set to be wavy, that is, the cross section of the annular sealing surface is arc-shaped, so that the annular sealing A linear seal can be formed between the surface and the valve plate 34, and abrasion or scratches between the valve seat 30 and the valve plate 34 can be avoided, thereby increasing the sealing performance. Optionally, the cross section of the end surface of the annular boss 304 can also be set in a tooth shape, that is, the cross section of the annular sealing surface is rectangular (or approximately rectangular, such as trapezoid, etc.) or triangular.

Further, the valve plate 34 provided in the embodiment of the present application can be connected to the valve stem 32 through an expansion sleeve, which can ensure the integrity of the valve plate 34 and the valve stem 32 and avoid structural damage to the valve plate 34 and the valve stem 32. For example, When using keyway, pin and other connection methods, it is necessary to open holes on the valve plate 34 or the valve stem 32 . In addition, since a fixed installation position is not required when the expansion sleeve is installed, it is convenient to adjust the valve plate 34 on the valve stem 32, so that the valve plate 34 can be installed in a proper position to ensure the sealing between the valve plate 34 and the valve stem 32. That is to say, in the process of use, when the sealing and matching pair between the valve plate 34 and the valve seat 30 is worn and a gap occurs, the valve plate 34 can be appropriately moved in a direction close to the valve seat 30 by a certain distance, and then The sealing cooperation of the valve plate 34 and the valve seat 30 is achieved again. In addition, due to the convenient installation and disassembly of the expansion sleeve, the later maintenance and replacement of the valve plate 34 can also be facilitated.

Specifically, the expansion sleeve may include an inner sleeve and an outer sleeve, and the inner sleeve and the outer sleeve are connected by bolts. The mating surface between the inner sleeve and the outer sleeve is a conical surface. With the tightening of the bolts, the outer sleeve expands outward and hugs the inner hole of the valve plate 34, and the inner sleeve compresses inward and hugs the outer wall of the valve stem 32, thereby The valve plate 34 is fixed on the valve stem 32 . In order to further increase the reliability of the connection between the valve plate 34 and the valve stem 32 , a shaft sleeve may be added to the inner hole of the valve plate 34 , and the shaft sleeve is welded in the inner hole of the valve plate 34 .

Further, the valve plate 34 is provided with a sealing ring 340, and the sealing ring 340 and the valve seat 30 form a sealing pair. A reliable sealing fit is formed between the valve plate 34 and the valve seat 30 .

Further, the valve plate 34 may be provided with an accommodating groove 342, the sealing ring 340 can be embedded in the accommodating groove 342, and the sealing ring 340 can be interfered with the accommodating groove 342 to increase the reliability of the installation and positioning of the sealing ring 340 and prevent the sealing ring 340 from being installed. 340 is displaced or dislodged. Of course, the sealing ring 340 can also be fixed on the valve plate 34 by means of bonding or the like.

Preferably, the accommodating groove 342 is set as a dovetail groove, and the cross section of the sealing ring 340 is set as a trapezoidal structure matched with the dovetail groove. 340 is released from the accommodating groove 342 . It can be understood that the accommodating groove 342 can also be set to other groove-like structures with a tendency to close, as long as a section of the accommodating groove 342 in the direction from the bottom of the groove to the notch gradually decreases in width, the clamping effect can be achieved.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims (10)

1. A regenerative high temperature oxidation furnace, comprising a furnace body, the furnace body is provided with a combustion chamber and a first regenerator, a second regenerator and a third regenerator separated from each other, each of the The hot chambers are respectively connected to the combustion chambers, and are characterized in that: One side of the furnace body is provided with a switching box, and an intake chamber, an exhaust chamber and a blowback chamber are formed in the switching box separately; The air inlet chamber is provided with a first air port respectively communicating with each of the regenerators, and the first air port is provided with an air inlet switching valve; The exhaust chamber is provided with second air ports respectively communicating with the regenerators, and the second air ports are provided with an air outlet switching valve; The backflushing chamber is provided with third vents respectively communicating with the regenerators, and the third vents are provided with a backflushing switching valve. 2 . The regenerative high temperature oxidation furnace according to claim 1 , wherein the switching box is further formed with a first distribution chamber, a second distribution chamber and a third distribution chamber which are separated from each other, and each of the The distribution chamber and the regenerator are in one-to-one correspondence and communicated with each other; The first ventilation port is provided between the air inlet chamber and the distribution chamber, the second ventilation port is provided between the exhaust chamber and the distribution chamber, and the third ventilation port is provided in the between the backflush chamber and the distribution chamber. 3 . The regenerative high temperature oxidation equipment according to claim 2 , wherein the regenerators are arranged in sequence along the length direction of the furnace body, and the distribution chambers are arranged along the length direction of the furnace body. 4 . in order. 4 . The regenerative high temperature oxidation equipment according to claim 3 , wherein the intake chamber, the exhaust chamber and the backflushing chamber respectively extend along the length direction of the furnace body. 5 . 5 . The regenerative high temperature oxidation equipment according to claim 2 , wherein, along the height direction of the furnace body, the switching box is arranged in a three-layer structure, and the distribution chamber is located at the top of the switching box. 6 . In the middle layer, the intake chamber and the blowback chamber are located on the upper layer of the switching box, and the exhaust chamber is located on the lower layer of the distribution chamber. 6 . The regenerative high temperature oxidation equipment according to claim 5 , wherein the cross section of the distribution chamber is set in a zigzag shape, and the bottom of the distribution chamber extends downward from the side close to the furnace body, 6 . A channel is formed to communicate with the regenerator. 7 . The regenerative high temperature oxidation equipment according to claim 1 , wherein the cross-section of the blowback chamber is smaller than the cross-section of the intake chamber and the cross-section of the exhaust chamber. 8 . 8. The regenerative high temperature oxidation equipment according to any one of claims 1-7, characterized in that, The switching box is arranged at the lower part of one side of the furnace body, and the switching box is integrated with the furnace body. 9 . The regenerative high temperature oxidation equipment according to claim 8 , wherein an operation platform is further provided on one side of the furnace body, and the operation platform is located above the switch box and is connected with the switch box. 10 . There are gaps between the boxes. 10 . The regenerative high temperature oxidation equipment according to claim 9 , wherein each of the switching valves is installed in a gap between the operating platform and the switching box. 11 .

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