CN202719916U - Straightening device for gas processing vessel - Google Patents

Abstract

The utility model provides a rectifier device for a gas processing container, a curved pipeline does not need to be used to detour upward temporarily, gas sent from a lower portion can be fully rectified on an inlet of the container and is guided to the lower portion in the container. The rectifier device for the gas processing container comprises a gas guide-in flow path (16), a detouring space (17), a stepped portion (18b), horizontal blades (21A-21C) and a rectifying grating (22), wherein the gas guide-in flow path (16) swerves the gas supplied from a slanting lower portion to the horizontal direction and sends the gas to a gas guide-in opening (15); the detouring space (17) is formed on an upper end portion of a gas passageway (13) and enables the gas guide-in opening (15) to be communicated from the side of the gas passageway; the stepped portion (18b) and a slanting guide portion (18c) are arranged in the detouring space (17); the horizontal blades (21A-21C) are arranged on an opening face of the gas guide-in opening (15) in the vertical direction in a multilayer mode; and the rectifying grating (22) is arranged in the gas passageway (13) which is in a lower level than the gas guide-in opening (15). The stepped portion (18b) comprises a lower vertical wall (18d) which is provided with a specified distance (Lo) from the gas guide-in opening (15) and droops from a top wall (18), the slanting guide portion (18c) inclines from the stepped portion (18b) towards a downstream side lower portion, the gas is guided downward, and the lower the level of the horizontal blades (21A-21C) is, the bigger the resistance to airflow is.

Description

Straightening device for gas processing vessel

technical field

The utility model relates to a rectification device for a gas processing container. The rectification device for a gas processing container is arranged in a gas processing container such as a gas temperature regulating tower, a gas cooler, a gas cooling device, and a cooling tower that need to uniformly transport the gas introduced into the container. on the entrance part.

Background technique

For example, in the gas temperature control tower of a waste incinerator, in order to spray cooling water into the gas (exhaust gas) to adjust the temperature, it is necessary to uniformly send the gas introduced from the upper part downward.

As shown in Fig. 12 and Fig. 13, the existing gas tempering tower is provided with a gas inlet 1a on the upper part of the tower main body 1, and a curved pipe 2 is connected to the gas inlet 1a. A plurality of vertical blades 3 and horizontal blades 4 are provided on the gas inlet 1 a of the tower main body 1 . In addition, the upper part of the tower main body 1 has a stepped portion 5, an inclined guide plate 6, and a rectification grid 7 provided along the entire plane section.

In this way, the exhaust gas discharged from the heat recovery boiler is first directed obliquely upward at an angle of 45 degrees through the curved pipe 2, and then bent downward at an angle of 90 degrees to introduce the gas at the upper part of the tower main body 1 from above at an angle of 45 degrees. Inlet port 1a. Then, the introduced gas is guided horizontally at the entrance of the tower main body 1 and rectified by the vertical blades 3 and horizontal blades 4 , and the gas is deflected downward by the stepped portion 5 and the inclined guide plate 6 . Furthermore, rectification is performed by the rectification grille 7, and the airflow in the cross section of the tower main body 1 becomes uniform.

However, in the above-mentioned conventional structure, since gas is introduced using the curved pipe 2, there is a problem that the curved pipe 2 protrudes upwards more than the gas temperature control tower installed at the uppermost part of the equipment building. Therefore, in order to cooperate with the curved pipe 2, it is necessary to carry out heightening construction on the top of the building.

Utility model content

In order to solve the above problems, the purpose of this utility model is to provide a rectification device for a gas processing container, which can fully rectify the gas sent from below at the entrance of the container and guide it to the gas flow in the container without using a curved pipe to temporarily detour upwards. below.

In order to achieve the above object, the rectification device for the gas processing container according to the first aspect of the present utility model is formed on the container with a gas channel for conveying gas from the upper part of the container to the lower part, and a gas inlet is opened on the upper side of the container, and the gas It is introduced into the container from the gas inlet and rectified. The rectification device for the gas processing container is characterized in that it includes: a gas introduction flow path, which turns the gas supplied from obliquely downward to the horizontal direction and sends it into the gas inlet; a detour space forms It is located at the upper end of the gas passage, and connects the gas inlet from the side; the step portion and the inclined guide portion are arranged in the detour space; the horizontal blades are arranged in multiple layers on the opening surface of the gas inlet along the vertical direction; and rectification The grill is disposed in the gas channel at a position lower than the gas inlet, the stepped portion includes a hanging wall, the hanging wall is a predetermined distance from the gas inlet and hangs down from the top wall, and the inclined guide portion is inclined downward from the stepped portion to the downstream side, Directing the gas downward, the lower the horizontal blades, the greater the resistance to the airflow.

According to the above structure, the exhaust gas flows obliquely upward through the gas introduction channel, then turns to the horizontal direction and is sent into the detour space from the gas introduction port, and becomes a high-speed flow in the center and outer periphery (upper part) of the channel cross section. However, among the airflows separated by the plurality of horizontal blades, the airflow flowing into the uppermost layer of the separation flow path portion at high speed is greatly decelerated by the resistance of the hanging wall. In addition, although the air flow is rapidly accelerated to a high speed temporarily in the separation flow path part in the center, the frictional resistance generated by contact with the horizontal blade, the air flow converging from the separation flow path part at the uppermost stage, and the inclined guide part The sharply expanded flow path area constitutes a huge resistance and gradually decelerates, and is guided into the rectification grille. In addition, in the lowermost separation channel portion, the air flow is not accelerated because the direction of the air flow is largely changed downward by the lower horizontal blades. Moreover, the relatively fast airflow in the center is averaged due to the effect of the rectifying grille and the contact of the airflows with each other.

Therefore, even if the airflow supplied from below is turned from obliquely downward to the horizontal direction by the gas introduction flow path and then sent into the container, the airflow can be decelerated by the multi-layered horizontal blades and steps in the detour space, and the flow velocity can be reduced by the rectifying grille. Homogenization, which can deliver uniform gas flow to the 90° curved gas path. Therefore, it is not necessary to protrude the gas introduction flow path upward and feed the gas from above, and it is not necessary to increase the height of the container storage building.

In addition, in the rectifying device for a gas processing container according to the second aspect of the present invention, the lower horizontal blades are inclined downward toward the downstream side.

In addition, in the rectifying device for a gas processing container according to the third aspect of the present invention, the horizontal vane is inclined at a predetermined introduction angle in the range from the front end to the middle bending position, and the range from the bending position to the rear end Inclined at a prescribed discharge angle, the discharge angle is set to be greater than the lead-in angle.

In addition, in the rectifying device for a gas processing container according to the fourth aspect of the present invention, the uppermost horizontal blade among the plurality of horizontal blades is not inclined, and the separation flow path formed between the top wall and the uppermost horizontal blade At the rear, the pendant walls are relatively arranged.

As described above, according to the utility model described in the first aspect, the exhaust gas flow that flows obliquely upward through the gas introduction channel, is turned horizontally, and is sent to the gas introduction port becomes a high-speed flow at the center and outer periphery of the channel section. . Furthermore, at the gas inlet, the uppermost airflow among the airflows separated by the plurality of horizontal blades flows in at a high speed, but is greatly decelerated by being surrounded by the hanging wall and the horizontal blades. In addition, although the airflow in the central part is rapidly accelerated to a high speed for a while, the frictional resistance generated by contact with the horizontal blades and the inclined guide part with a rapidly enlarged flow path area decelerate the airflow and guide it into the rectifying grille. The air flow in the lowermost layer is not accelerated because it is substantially redirected downward by the lower horizontal blades. Furthermore, the relatively fast air flow in the central portion is averaged by the action of the rectifying grill and the mutual contact of the air flow.

Therefore, even if the gas flow supplied from below is diverted from obliquely downward to the horizontal direction by the gas introduction channel and then introduced into the container, the gas flow can be rectified so that the flow rate is uniform in the gas channel that sends the gas downward, and uniform gas treatment can be performed without using The gas introduction pipe protrudes upwards, so there is no need to heighten the storage building.

Description of drawings

FIG. 1 is a configuration diagram showing a rectifying device according to an embodiment of the present invention.

Fig. 2 is a partially enlarged cross-sectional view showing main parts of the rectifying device.

Fig. 3 is an enlarged perspective view showing essential parts of the rectifying device.

Fig. 4 is a longitudinal sectional view showing the simulation results of the air flow of the same rectification device.

Fig. 5 is a velocity distribution diagram showing the flow velocity at the position a-a' shown in Fig. 4 .

Fig. 6 is a velocity distribution diagram showing the flow velocity at the position b-b' shown in Fig. 4 .

Fig. 7 is a velocity distribution diagram showing the flow velocity at the c-c' position shown in Fig. 4 .

Fig. 8 is a velocity distribution diagram showing the flow velocity at the position d-d' shown in Fig. 4 .

Fig. 9 is a velocity distribution diagram showing the flow velocity at the e-e' position shown in Fig. 4 .

Fig. 10 is a velocity distribution diagram showing the flow velocity at the f-f' position shown in Fig. 4 .

Fig. 11 is an enlarged velocity distribution diagram showing the flow velocity at the g-g' position shown in Fig. 4 .

Fig. 12 is a configuration diagram showing a conventional rectifying device.

Fig. 13 is an enlarged perspective view showing a main part of a conventional rectifying device.

Explanation of reference signs

10 rectification device

11 Tempering Tower

12 containers

13 gas passage

15 gas inlet

16 Gas introduction pipe (gas introduction flow path)

16a vertical connection

16b inclined part

16c horizontal feeding part

17 roundabout space

18 top wall

18a plane part

18b step part

18c inclined guide

18d pendant wall

20A～20D separation channel

21A～21C horizontal wing (horizontal blade)

22 rectification grille

22b horizontal blade

Detailed ways

Here, an embodiment of the gas rectifying device of the present invention will be described based on FIGS. 1 to 11 .

The rectification device 10 is for example arranged on a temperature regulation tower 11, and the temperature regulation tower 11 is arranged on the exhaust gas path of the waste incinerator equipment, and in the container 12 of the temperature regulation tower 11, the gas is fed from the upper part to the lower part. In the gas passage 13 having a rectangular cross section, cooling water is sprayed into the exhaust gas to obtain exhaust gas at a predetermined temperature. Therefore, if the flow velocity of the gas passage 13 is not uniform, effective cooling cannot be achieved.

The rectification device 10 is connected to a gas introduction pipe 16 (an example of a gas introduction flow path) between a vertical gas pipe 14 and a gas introduction port 15 of the temperature adjustment tower 11 . The gas inlet 15 is opened on the upper side wall of the temperature adjustment tower 11 and communicated with the gas passage 13 . In addition, the outlet of the gas introduction pipe 16 forms a rectangular cross-section with a width w and a height h, and the ratio of the rectangular cross-section to the cross-sectional area of the gas passage 13 is, for example, 1:2. Furthermore, the gas introduction pipe 16 includes: a vertical connection portion 16a connected to the gas pipe 14; an inclined portion 16b bent obliquely upward from the vertical connection portion 16a at a bending angle θ (40° to 50°); and a horizontal feeding portion 16c , is further bent in the horizontal direction from the upper end of the inclined portion 16b, and is connected to the gas introduction port 15 . The gas introduction pipe 16 turns the gas supplied from obliquely downward to the horizontal direction and sends it into the gas introduction port 15 .

The gas passage 13 forms a rectangular cross section with a channel width W (=w) and a height (depth) H. A detour space 17 is formed at the upper end of the gas passage 13 , and the detour space 17 detours the gas flow blown in the horizontal direction from the gas inlet 15 downward. Formed on the top wall 18 of the detour space 17 connected to the upper side of the gas inlet 15 are: a flat portion 18a extending horizontally from the horizontal feeding portion 16c across the gas inlet 15; and a stepped portion 18b protruding downward. ; and the inclined guide portion 18c is inclined to the back side and downward of the stepped portion 18b.

That is, the stepped portion 18b includes: a hanging wall 18d having a height Ho suspended from a position at a predetermined distance Lo from the gas inlet 15 on the planar portion 18a of the top wall 18, and facing the gas inlet 15; and a wall 18d having a length Lp. The horizontal wall 18e is connected to the lower end of the hanging wall 18d. The step portion 18b exerts great resistance to air flow. In addition, the inclined guide portion 18c is detoured downward from the rear end portion of the horizontal wall 18e so that the flow path section expands the airflow, and is attached so that the inclination angle α=30-40° from the horizontal downward.

In addition, three horizontal blades 21A to 21C (an example of horizontal blades) such as upper, middle and lower layers are arranged in the detour space 17 , and the horizontal blades 21A to 21C extend rearward from the opening surface of the gas inlet 15 . These horizontal wings 21A to 21C are vertically arranged to partition the separation channel portions 20A to 20D of predetermined heights HA to HD, and are attached between side walls across the entire width direction of the detour space 17 . In addition, among the horizontal wings 21A to 21C, the lower ones are inclined downward on the downstream side so as to increase the resistance to the airflow.

Specifically referring to FIG. 2 for description, the upper level horizontal wing 21A has a total length of LA and is formed into a flat plate extending horizontally rearward. The introduction angle βA (not shown) = 0°, and the discharge angle γA (not shown) = 0°. . That is, the upper horizontal blade 21A (corresponding to the uppermost horizontal blade) is not inclined, and the vertical wall 18d is opposite to the rear of the uppermost separation channel portion 20A formed between the planar portion 18a of the ceiling wall 18 and the upper horizontal blade 21A. configuration. The middle horizontal blade 21B has a total length of LB, is inclined at an introduction angle βB from the front end to a middle bending position PB, and is inclined at a discharge angle γB from the bending position PB to a rear end. The lower horizontal blade 21C has a total length of LC, is inclined at an introduction angle βC from the front end to an intermediate bending position PC, and is inclined at a discharge angle γC from the bending position PC to the rear end. In addition, the bending positions PB and PC may be arcuate with a radius.

Here, in order to increase the resistance of the uppermost separation channel portion 20A, its height HA is set to be equal to or smaller than the height Ho of the hanging wall 18 d (HA≦Ho). Of course, the length LA of the upper horizontal blade 21A is set to be smaller than the length Lo of the planar portion 18a (LA<Lo) to form the space 20a for discharging the gas of the separation channel portion 20A. In addition, the lengths of the horizontal blades 21A to 21C are LA>LB (LBf+LBr)>LC (LCf+LCr), the introduction angle βA<βB<βC, and the discharge angle γA<γB<γC. In addition, lead-in angle βB<discharge angle γB, lead-in angle βC<discharge angle γC.

This is because, when the airflow is introduced into the gas inlet 15 from the horizontal direction and rotates downward in the detour space 17, there is a tendency for the flow velocity to be faster the farther away from the rotation center, so it is necessary to limit this situation. The blades 21A to 21C decelerate the airflow by causing their contact resistance to act. In addition, since the radius of rotation becomes smaller toward the rotation center side, the airflow can be smoothly rotated by setting the introduction angle β and the discharge angle γ large.

In addition, a rectification grid 22 is provided at a lower position separated by a predetermined distance Δh from the lower side of the gas inlet 15. The rectification grid 22 is composed of a plurality of vertical blades 22a and a plurality of horizontal blades 22b at a certain interval. The plurality of vertical vanes 22a are provided along the transport direction of the introduced gas, and the plurality of horizontal vanes 22b are provided along the transverse direction of the introduced gas.

According to the above structure, the exhaust gas introduced from the gas duct 14 to the gas introduction duct 16 turns obliquely upward at the inclined portion 16b, then turns horizontally and is sent into the gas introduction port 15 from the horizontal feeding portion 16c. At this time, a high-speed airflow is formed in the center and outer periphery of the cross section of the flow path.

In the gas inlet 15 , among the separation flow passages 20A to 20D separated by the horizontal blades 21A to 21C, the uppermost separation flow passage 20A originally flows in at a relatively high speed, but because it faces the gas inlet 15 The drooping wall 18d and the horizontal wing 21A arranged are greatly decelerated and cannot be accelerated. In addition, at the separation channel parts 20B and 20C in the central part, the air flow is rapidly accelerated and then temporarily becomes high speed, but the frictional resistance generated by contact with the horizontal blades 21A to 21C, the air flow flowing in from the space 20a, and the airflow in the inclined guide part The airflow is decelerated and introduced into the rectifying grille 22 due to the sharply enlarged flow path area at 18c. In the lowermost separation channel portion 20D, the air flow is not accelerated because the direction of the air flow is greatly changed downward by the lower horizontal blade 21C. Also, at the rectifying grill 22, although a slightly high-speed airflow occurs due to the relatively high flow velocity at the central portion, it is averaged by the action of the rectifying grill 22 and the mutual contact of the airflow.

Here, simulation results of the rectification device 10 having the above-mentioned configuration will be described with reference to FIGS. 4 to 11 . The height of the gas introduction pipe 16 (gas introduction port 15 ) set here is h=1000, the width is w (=W)=2000, the horizontal wings 21A-21C are arranged as HA=HB=HC=HD=250, and the length LA=600, LBf=300, LBr=300, LCf=200, LCr=250, introduction angle and discharge angle are βA=0, βB=7°, γB=45°, βC=12°, γC=67° (each angle ±2.5°), the height of the rectifying grid 22 is Hm=300, the pitch is 150, and the height of the gas passage 13 is h=20000 (the unit of length is mm). Here, the gas flow rate is 10000-30000 Nm ³ /h, and the gas temperature at the inlet corresponds to 240°C.

From the flow velocity distribution shown in FIG. 4 and the flow velocity distribution at each cross-sectional position shown in FIGS. 5 to 11 , it can be seen that the flow velocity distribution of the gas sent downward from the rectifying grid 22 is uniform.

According to the above-mentioned embodiment, the waste gas flow sent into the gas inlet 15 after the gas inlet pipe 16 turns from below to obliquely upward and horizontally is introduced into the detour space 17 due to the high-speed upper airflow to the separated part blocked by the drooping wall 18d. After the flow path portion 20A, the flow is separated by the upper horizontal blade 21A and sent out from the space 20a between the upper horizontal blade 21A and the drooping wall 18d, so that the airflow rapidly accelerated outside the detour side can be greatly decelerated. In addition, the airflow introduced into the separation flow passage portions 20B and 20C in the central portion is effectively decelerated by the frictional resistance caused by contact with the horizontal blades 21A to 21C and the rapidly enlarged flow passage area. Furthermore, the air flow flowing into the lower separation channel portion 20D is not accelerated due to the large turning angle of the lower horizontal blade 21C. Accordingly, the rectifying grille 22 does not generate local high-speed airflow in the gas passage 13, and can obtain an airflow with a uniform flow rate, so that uniform and efficient exhaust gas temperature adjustment can be performed.

Claims (4)

1. gas treatment cylinder fairing, be formed with the gas passage that section from container carries gas downwards at container, upper side at container offers gas introduction port, and gas is imported in the container and carries out rectification from gas introduction port, and described gas treatment cylinder is characterised in that with fairing and comprises:

Gas imports stream, and the gas turns horizontal direction that will supply with from oblique below is also sent into gas introduction port;

Circuitous space is formed at the upper end of gas passage, and gas introduction port is communicated with from the side;

Stage portion and tilt guides are arranged on circuitous space;

Horizontal blade, along the vertical direction with multi-layer configuration on the opening surface of gas introduction port; And

Flow straightening grid is configured in than gas introduction port more in the gas passage of low level,

Stage portion comprises downwardly depending wall, and described downwardly depending wall hangs down apart from the gas introduction port predetermined distance and from roof,

Tilt guides from stage portion downstream side-lower tilt, with the gas channeling below,

More the horizontal blade of low level is larger to the resistance of air-flow.

2. gas treatment cylinder fairing according to claim 1 is characterized in that, more more downstream side-lower inclination of the described horizontal blade of low level.

3. gas treatment cylinder fairing according to claim 2 is characterized in that,

Described horizontal blade is the importing overturning angle to stipulate on the scope till the bending position from the front end to the centre, and the discharge angle with regulation tilts on the scope till from the bending position to the rear end,

Discharge angle is set to greater than importing the angle.

4. gas treatment cylinder fairing according to claim 2 is characterized in that,

The horizontal blade that is positioned at the superiors in a plurality of horizontal blades does not tilt,

The rear of separating stream section that forms between the horizontal blade of roof and the superiors, described downwardly depending wall configures relatively.

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