Denitration ammonia water spray gun and automatic directional spraying system thereof

Abstract

The invention relates to the technical field of flue gas treatment, and particularly discloses a denitration ammonia water spray gun and an automatic directional spraying system thereof. A denitration ammonia water spray gun comprises a spray gun body, the spray gun body is located in a flue gas treatment pipeline, the flue gas treatment pipeline comprises a flue gas inlet and an exhaust pipe, and the spray gun body is located above the flue gas inlet; an outer atomization assembly and an inner atomization assembly are arranged in the flue gas treatment pipeline; the outer atomization assembly comprises a reflection hopper, the reflection hopper is aligned with a first opening in a main channel in the spray gun body, the reflection hopper is connected with a mounting frame, the mounting frame abuts against the inner wall of the flue gas treatment pipeline, and a plurality of through holes are formed in the mounting frame. The outer atomization assembly, the inner atomization assembly and the spray gun body are matched with one another to form an outer atomization area and an inner atomization area, compared with a single atomization area, the inner atomization area and the outer atomization area share the responsibility of flue gas treatment, the length of the single atomization area is not too long, and maintenance is easier.

Description

Technical Field

[0001] The invention belongs to the technical field of flue gas treatment, and in particular relates to a denitrification ammonia water spray gun and an automatic directional spraying system thereof. Background Art

[0002] Denitrification ammonia water is an environmentally friendly material used to reduce the emission of nitrogen oxides in flue gas. Its main principle is to convert nitrogen oxides in flue gas into harmless nitrogen and water through chemical reactions.

[0003] In a Chinese patent with the publication number CN 220758687 U, an SCR denitrification ammonia water spraying device is disclosed, which includes a base, a first shell and a second shell, the top surface of the base is welded with a fixing frame, and the inner wall of the fixing frame is welded with the first shell and the second shell, the inner wall of the second shell is installed with a limit tube and a filter screen, and the limit tube is provided with an atomizing nozzle, the rear end surface of the second shell is welded with a liquid storage tank, and a booster pump is installed on the liquid storage tank, and the booster pump is connected to the liquid storage tank through the booster pipe, the top surface of the inner wall of the first shell is welded with a partition, and the rear end surface of the first shell is installed with a negative pressure pump, and the negative pressure pump is connected to the first shell;

[0004] However, the above device has the following problems during use:

[0005] The denitrified ammonia water is sprayed in an atomized form to form an atomized area. When the flue gas passes through the atomized area, it mixes with the denitrified ammonia water in the atomized area, thereby removing the nitrogen oxides in the flue gas. However, when removing the nitrogen oxides in the flue gas through a single atomized area, in order to ensure the treatment effect during operation, the formed atomized area needs to be larger. During the flow of the flue gas, the flow of the flue gas will damage the atomized area, and it is inconvenient to maintain a larger atomized area. Therefore, the present application proposes a denitrified ammonia water spray gun and an automatic directional spraying system thereof. Summary of the invention

[0006] The object of the present invention is to provide a denitrification ammonia water spray gun and an automatic directional spraying system thereof to solve the problems raised by the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: a denitrification ammonia water spray gun, comprising a spray gun body, the spray gun body is located inside a flue gas treatment pipeline, and the flue gas treatment pipeline comprises a smoke inlet and an exhaust pipe, and the spray gun body is located above the smoke inlet;

[0008] The flue gas treatment pipeline is provided with an external atomization component and an internal atomization component;

[0009] The external atomization assembly includes a reflector, the reflector is aligned with the first opening in the main channel in the spray gun body, the reflector is connected to a mounting frame, the mounting frame abuts against the inner wall of the smoke treatment pipe, and a plurality of through holes are provided in the mounting frame for the circulation of smoke;

[0010] The inner atomization assembly includes a liquid baffle, which is arranged on two connecting plates. The connecting plates are connected to a rotating shaft inserted into the spray gun body. The rotating shaft is connected to a power unit, and the power unit is used to drive the rotating shaft to swing back and forth in both directions.

[0011] Preferably, the spray gun body comprises a main channel and an auxiliary channel, and the auxiliary channel is provided with two second openings, the two second openings are symmetrically distributed, and the two second openings face the first opening in the main channel located between the two second openings.

[0012] Preferably, the main channel and the auxiliary channel are connected to the main pipeline and the auxiliary pipeline respectively, the main pipeline and the auxiliary pipeline are connected through a pipeline valve, the pipeline valve is connected to a transfer box, the transfer box is connected to a feed pipeline through which deionized ammonia water flows, the transfer box is arranged on the outer wall of the flue gas treatment pipeline, and a one-way exhaust valve is arranged on the top of the transfer box.

[0013] Preferably, a mixing fan is installed on the mounting frame, and the mixing fan is connected to a power supply.

[0014] Preferably, the power unit includes a gear set, the gear set includes a half gear and a transmission gear, the transmission gear is sleeved with a rotating shaft inserted into the spray gun body, the transmission gear cooperates with the half gear, and the half gear is connected to the output shaft of the drive motor through a key.

[0015] Preferably, a sector block is installed on the rotating shaft, a first blocking plate and a second blocking plate are respectively arranged on both sides of the sector block, the second blocking plate is connected to the elastic component, the elastic component passes through the first blocking plate, and the sector block is located inside the reset box.

[0016] Preferably, a guide block is provided on the connecting plate, the guide block is inserted into a guide frame, and the guide frame is connected to the upper support ring.

[0017] An automatic directional spraying system for a denitrification ammonia water spray gun comprises a denitrification ammonia water spray gun and a supporting mechanism, wherein a spray gun body is connected to an inner wall of a flue gas treatment pipe via the supporting mechanism, wherein the supporting mechanism comprises a lower supporting plate and an upper supporting ring, wherein both the lower supporting plate and the upper supporting ring are in contact with the inner wall of the flue gas treatment pipe, and a plurality of vertical plates are arranged between the lower supporting plate and the upper supporting ring.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The outer atomization assembly and the inner atomization assembly of the present invention cooperate with the spray gun body to form an outer and an inner atomization area to treat the flue gas in layers. During operation, a funnel-shaped reflection bucket is provided in the flue gas treatment pipeline. If the deionized ammonia water sprayed from the spray gun body collides with the reflection bucket, a large number of water droplets can be generated during the collision, so that an outer atomization area is formed on the side of the reflection bucket close to the spray gun body; and the rotating shaft in the inner atomization assembly can swing back and forth in both directions, and the connecting plate and the liquid baffle connected thereto can be driven to swing back and forth during the swinging process. During the reciprocating swinging process, the liquid baffle will block the first opening of the main channel in the spray gun body in part of the time period. At this time, the deionized ammonia water flowing out of the first opening is blocked by the liquid baffle, and the inner atomization area is formed at the liquid baffle after the collision between the two; compared with a single atomization area, the inner and outer atomization areas share the responsibility of treating the flue gas, and the length of the single atomization area does not need to be too long, which is simpler to maintain.

[0020] 2. The spray gun body of the present invention is provided with a main channel and an auxiliary channel, and the auxiliary channel is provided with two second openings, and the second openings are located on the upper and lower sides of the first opening in the main channel. The deionized ammonia water is transported through the main pipeline and the auxiliary pipeline, and finally sprayed out from the main channel and the auxiliary channel. The deionized ammonia water sprayed from the first opening and the second opening are combined to form a thicker water flow with a larger flow rate. Even if there is some gas in the combined water flow, it will not affect the spraying effect of the entire water flow. In this way, the deionized ammonia water can be sprayed stably and in large quantities, and the two atomization areas formed are also relatively stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the denitrification ammonia water spray gun and its automatic directional spraying system in the present invention.

[0022] Figure 2 It is a schematic diagram of the internal structure of the denitrification ammonia water spray gun and its automatic directional spraying system in the present invention.

[0023] Figure 3 This is one of the structural schematic diagrams after the flue gas treatment pipeline and the exhaust pipe are separated in the present invention.

[0024] Figure 4 For the present invention Figure 3 Schematic diagram of the structure at A in the middle.

[0025] Figure 5 This is the second structural schematic diagram of the present invention after the flue gas treatment pipeline and the exhaust pipe are separated.

[0026] Figure 6 For the present invention Figure 3 Schematic diagram of the structure at B in the figure.

[0027] Figure 7It is a schematic structural diagram of the fan-shaped block, the first baffle plate and the second baffle plate in the present invention.

[0028] Figure 8 This is the third structural schematic diagram after the flue gas treatment pipeline and the exhaust pipe are separated in the present invention.

[0029] In the figure: 1, flue gas treatment pipeline; 2, exhaust pipe; 3, spray gun body; 301, main channel; 302, auxiliary channel; 303, main pipeline; 304, auxiliary pipeline; 305, pipeline valve; 306, transfer box; 307, feed pipeline; 308, one-way exhaust valve;

[0030] 4. External atomization assembly; 401. Reflection bucket; 402. Mounting frame; 403. Through hole; 404. Mixing fan; 5. Internal atomization assembly; 501. Liquid baffle; 502. Connecting plate; 503. Rotating shaft; 504. Gear set; 505. Driving motor; 506. Fan-shaped block; 507. First blocking plate; 508. Second blocking plate; 509. Elastic assembly; 510. Reset box; 511. Guide block; 512. Guide frame; 6. Support mechanism; 601. Lower support plate; 602. Upper support ring; 603. Vertical plate. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Reference Figure 1-Figure 8 A denitrification ammonia water spray gun and an automatic directional spraying system thereof include a spray gun body 3, the spray gun body 3 is located inside a flue gas treatment pipeline 1, and the flue gas treatment pipeline 1 includes a smoke inlet and an exhaust pipe 2, the spray gun body 3 is located above the smoke inlet, and the exhaust pipe 2 is vertically distributed with the flue gas treatment pipeline 1.

[0033] The spray gun body 3 is capable of spraying out the deionized ammonia water it transports, which mixes with the flue gas in the flue gas treatment pipeline 1 and converts the nitrogen oxides in the flue gas into harmless nitrogen and water through chemical reactions. Specifically, the ammonia water reacts with the nitrogen oxides (NOx) in the flue gas to generate nitrogen and water, thereby reducing the concentration of nitrogen oxides in the flue gas. After the concentration of nitrogen oxides is reduced to meet the standards, the flue gas is discharged through the exhaust pipe 2.

[0034] Most existing spray guns use a single-channel liquid delivery method to transport deionized ammonia water. When the deionized ammonia water is sprayed, it is affected by the mixed gas in the deionized ammonia water or the gas generated by the volatilization of the ammonia water. The amount of liquid sprayed is unstable. As a result, the number of water droplets formed in the atomization area is different, and the atomization area formed is unstable. It is easy for smoke to escape and the nitrogen oxides in it are not fully treated. Therefore, the spray gun body 3 includes a main channel 301 and an auxiliary channel 302. The second openings of the auxiliary channel 302 are provided with two, and the two second openings are symmetrically divided into The main channel 301 and the auxiliary channel 302 are connected to the main pipeline 303 and the auxiliary pipeline 304 respectively. The main pipeline 303 and the auxiliary pipeline 304 are connected through a pipeline valve 305. The pipeline valve 305 is connected to a transfer box 306. The transfer box 306 is connected to a feed pipeline 307 through which denitrified ammonia water flows. The transfer box 306 is arranged on the outer wall of the flue gas treatment pipeline 1, and a one-way exhaust valve 308 is arranged on the top of the transfer box 306.

[0035] A cavity is provided at the top of the transfer box 306. Before the deionized ammonia water enters the spray gun body 3, it accumulates in the transfer box 306. A cavity is provided at the top of the transfer box 306. The air mixed in the deionized ammonia water during the flow and the gas generated by the volatilization of the ammonia water therein will enter the cavity at the top, and the gas in the cavity is discharged through the one-way exhaust valve 308. In this way, the gas mixed in the deionized ammonia water in the transfer box 306 is greatly reduced, and the flow rate of the deionized ammonia water that flows into the spray gun body 3 through the transfer box 306 during the spraying process is also more uniform.

[0036] At the same time, the spray gun body 3 is provided with a main channel 301 and an auxiliary channel 302. The auxiliary channel 302 is provided with two second openings. The second openings are located on the upper and lower sides of the first opening in the main channel 301. The deionized ammonia water is transported through the main pipeline 303 and the auxiliary pipeline 304, and finally sprayed out from the main channel 301 and the auxiliary channel 302. The deionized ammonia water sprayed from the first opening and the second opening are combined to form a thicker water flow with a larger flow rate. Even if there is some gas in the combined water flow, it will not affect the spraying effect of the entire water flow. In this way, the deionized ammonia water can be sprayed stably and in large quantities, and the two atomization areas formed are also relatively stable.

[0037] At present, when treating flue gas, most of the time, denitrified ammonia water is sprayed out through a spray gun to form an atomization area. When the flue gas passes through the atomization area, it mixes with the denitrified ammonia water in the atomization area, thereby removing nitrogen oxides in the flue gas. However, in order to ensure the treatment effect, the atomization area formed by a single atomization area needs to be longer. During the flow of the flue gas, the flow of the flue gas will damage the atomization area. It is inconvenient to maintain a longer atomization area. Therefore, an external atomization component 4 and an internal atomization component 5 are provided inside the flue gas treatment pipeline 1. The external atomization component 4, the internal atomization component 5 cooperate with the spray gun body 3 to form an outer and an inner atomization area. The two atomization areas treat the flue gas in layers. Compared with a single atomization area, the two atomization areas share the responsibility of treating the flue gas. The length of the single atomization area does not need to be too long, and it is simpler to maintain.

[0038] In a further embodiment, the external atomization component 4 includes a reflection bucket 401, which is aligned with the first opening in the main channel 301 in the spray gun body 3. The reflection bucket 401 is generally arranged in a funnel shape (the funnel protrudes toward the side away from the spray gun body 3, so that the external atomization area formed after the deionized ammonia water sprayed from the spray gun body 3 collides with the reflection bucket 401 is on the side of the reflection bucket 401 close to the spray gun body 3, and the formed water droplets can be attached to the entire area below the reflection bucket 401). The deionized ammonia water sprayed from the spray gun body 3 collides with the reflection bucket 401, and a large number of water droplets are generated by the collision, forming an external atomization area on the side of the reflection bucket 401 close to the spray gun body 3. The reflection bucket 401 is connected to the mounting frame 402, and the mounting frame 402 abuts against the inner wall of the flue gas treatment pipe 1. A plurality of through holes 403 are arranged in the mounting frame 402, and the through holes 403 are used to allow the flue gas to flow.

[0039] More specifically, a mixing fan 404 is mounted on the mounting frame 402, and the mixing fan 404 is connected to a power source. Figure 2 The through hole 403 is arranged on one side of the flue gas treatment pipeline 1 close to the inner wall of the pipeline, and the reflector 401 is arranged in the middle position of the flue gas treatment pipeline 1. The outer atomization area formed by the collision between the reflector 401 and the deionized ammonia water sprayed from the spray gun body 3 is relatively uniform, and the flue gas mainly enters from the through hole 403 close to the inner wall. In order to avoid a large amount of flue gas passing through the edge of the outer atomization area, a mixing fan 404 is installed on the mounting frame 402, which can give the flue gas a force to flow toward the center of the flue gas treatment pipeline 1, so that it can pass through the outer atomization area evenly from all places.

[0040] Please refer to Figure 3 , Figure 6 , Figure 7The inner atomizing assembly 5 includes a liquid baffle 501, which is arranged on two connecting plates 502, and the connecting plates 502 are connected to a rotating shaft 503 inserted into the spray gun body 3, and the rotating shaft 503 is connected to a power unit, and the power unit is used to drive the rotating shaft 503 to swing back and forth in a positive and negative direction;

[0041] The rotating shaft 503 swings back and forth in both directions, which can drive the connecting plate 502 and the liquid baffle 501 connected thereto to swing back and forth. During the reciprocating swinging process, the liquid baffle 501 will block the first opening of the main channel 301 in the spray gun body 3 for a part of the time period. At this time, the denitrified ammonia water flowing out of the first opening is blocked by the liquid baffle 501. After the collision between the two, an inner atomization area is formed at the liquid baffle 501. When the flue gas passes through the inner atomization area, it mixes with the denitrified ammonia water doped inside the inner atomization area. In this way, the flue gas can be treated to remove nitrogen oxides again, and the nitrogen oxides in the flue gas can be removed in cooperation with the external atomization area.

[0042] The power unit can adopt various structures, please refer to Figure 6 One structure is as follows: the power unit includes a gear set 504, the gear set 504 includes a half gear and a transmission gear, the transmission gear is sleeved with the rotating shaft 503 inserted into the spray gun body 3, the transmission gear cooperates with the half gear, and the half gear is connected to the output shaft of the driving motor 505 through a key, the driving motor 505 can drive the half gear to rotate, and during the rotation of the half gear, when the teeth inside the half gear rotate to the area that cooperates with the transmission gear, the rotation of the half gear can drive the transmission gear to rotate, at this time, the rotating shaft 503, the connecting plate 502, and the liquid baffle 501 are pushed, and when the teeth inside the half gear are not meshed with the transmission gear, the liquid baffle 501 that loses thrust can be reset, and the power for resetting the liquid baffle 501 can come from its own gravity or from the elastic force of other components.

[0043] The elastic force of the above-mentioned other components comes from the elastic component 509 and other components. Specifically, a fan-shaped block 506 is installed on the rotating shaft 503, and a first blocking plate 507 and a second blocking plate 508 are respectively arranged on both sides of the fan-shaped block 506. The first blocking plate 507 and the second blocking plate 508 are used to limit the rotation angle of the fan-shaped block 506, that is, the fan-shaped block 506 can only rotate between the first blocking plate 507 and the second blocking plate 508, and cannot exceed this area. The second blocking plate 508 is connected to the elastic component 509, and the elastic component 509 passes through the first blocking plate 507. The fan-shaped block 506 is located inside the reset box 510, and the fan-shaped block 506 and the reset box 510 can rotate relative to each other. The elastic component 509 can push the connecting plate 502 and the liquid baffle 501 back to their positions when the half gear does not give the transmission gear thrust, and then the half gear continues to rotate, so that the reciprocating swing of the liquid baffle 501 and other components can be achieved.

[0044] When the liquid baffle 501 rotates to a position aligned with the first opening of the main channel 301 in the spray gun body 3, it collides with the deionized ammonia water sprayed from the spray gun body 3 to form an inner atomization area. When the liquid baffle 501 is impacted by the deionized ammonia water, it is easy to shake. In order to bear the impact force, a guide block 511 is provided on the connecting plate 502. The guide block 511 is inserted into the guide frame 512, and the guide frame 512 is connected to the upper support ring 602. The exhaust pipe 2 is farther from the smoke inlet than the inner atomization area. In this way, the smoke can be discharged through the exhaust pipe 2 after being processed by the outer atomization area and the inner atomization area.

[0045] In order to keep the spray gun body 3 in a stable state during the process of spraying deionized ammonia water, the spray gun body 3 is connected to the inner wall of the flue gas treatment pipe 1 through a supporting mechanism 6. Specifically, the supporting mechanism 6 includes a lower supporting plate 601 and an upper supporting ring 602. The lower supporting plate 601 and the upper supporting ring 602 are both in contact with the inner wall of the flue gas treatment pipe 1, and a number of vertical plates 603 are arranged between the lower supporting plate 601 and the upper supporting ring 602.

[0046] Working principle:

[0047] The outer atomizing component 4, the inner atomizing component 5 and the spray gun body 3 cooperate with each other to form an outer atomizing area and an inner atomizing area to treat the flue gas in layers. When working, a funnel-shaped reflector 401 is arranged in the flue gas treatment pipeline 1. If the denitrified ammonia water sprayed from the spray gun body 3 collides with the reflector 401, a large number of water droplets can be generated during the collision process, so that an outer atomizing area is formed on the side of the reflector 401 close to the spray gun body 3;

[0048] The rotating shaft 503 in the inner atomizing assembly 5 can swing back and forth in both directions, and during the swinging process, it can drive the connecting plate 502 and the liquid baffle 501 connected thereto to swing back and forth. During the reciprocating swinging process, the liquid baffle 501 will block the first opening of the main channel 301 in the spray gun body 3 for a period of time. At this time, the denitrified ammonia water flowing out of the first opening is blocked by the liquid baffle 501, and after the collision between the two, an inner atomizing area is formed at the liquid baffle 501.

[0049] Compared with a single atomization area, the inner and outer atomization areas share the responsibility of treating the flue gas. The length of a single atomization area does not need to be too long, and it is easier to maintain.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A denitrification ammonia water spray gun, comprising a spray gun body (3), characterized in that: The spray gun body (3) is located inside the smoke treatment pipeline (1), and the smoke treatment pipeline (1) includes a smoke inlet and an exhaust pipe (2), and the spray gun body (3) is located above the smoke inlet; The flue gas treatment pipeline (1) is provided with an external atomization component (4) and an internal atomization component (5); The external atomization assembly (4) comprises a reflector (401), the reflector (401) is aligned with a first opening in a main channel (301) in a spray gun body (3), the reflector (401) is connected to a mounting frame (402), the mounting frame (402) is in contact with an inner wall of a flue gas treatment pipe (1), and a plurality of through holes (403) are provided in the mounting frame (402), and the through holes (403) are used for the circulation of flue gas; The internal atomization assembly (5) comprises a liquid baffle (501), the liquid baffle (501) being arranged on two connecting plates (502), the connecting plates (502) being connected to a rotating shaft (503) inserted into the spray gun body (3), the rotating shaft (503) being connected to a power unit, and the power unit being used to drive the rotating shaft (503) to swing back and forth in forward and reverse directions.

2. A denitrification ammonia water spray gun according to claim 1, characterized in that: The spray gun body (3) comprises a main channel (301) and an auxiliary channel (302). The auxiliary channel (302) is provided with two second openings, the two second openings are symmetrically distributed, and the two second openings face the first opening in the main channel (301) located between the two second openings.

3. A denitrification ammonia water spray gun according to claim 2, characterized in that: The main channel (301) and the auxiliary channel (302) are connected to the main pipeline (303) and the auxiliary pipeline (304) respectively; the main pipeline (303) and the auxiliary pipeline (304) are connected via a pipeline valve (305); the pipeline valve (305) is connected to a transfer box (306); the transfer box (306) is connected to a feed pipeline (307) through which deionized ammonia water flows; the transfer box (306) is arranged on the outer wall of the flue gas treatment pipeline (1); and a one-way exhaust valve (308) is arranged on the top of the transfer box (306).

4. A denitrification ammonia water spray gun according to claim 1, characterized in that: A mixing fan (404) is installed on the mounting frame (402), and the mixing fan (404) is connected to a power source.

5. A denitrification ammonia water spray gun according to claim 1, characterized in that: The power unit comprises a gear set (504), the gear set (504) comprises a half gear and a transmission gear, the transmission gear is sleeved with a rotating shaft (503) inserted into the spray gun body (3), the transmission gear cooperates with the half gear, and the half gear is connected to the output shaft of the driving motor (505) through a key.

6. A denitrification ammonia water spray gun according to claim 5, characterized in that: A fan-shaped block (506) is installed on the rotating shaft (503), and a first blocking plate (507) and a second blocking plate (508) are respectively arranged on both sides of the fan-shaped block (506). The second blocking plate (508) is connected to the elastic component (509), and the elastic component (509) passes through the first blocking plate (507). The fan-shaped block (506) is located inside the reset box (510).

7. A denitrification ammonia water spray gun according to claim 6, characterized in that: A guide block (511) is provided on the connecting plate (502), the guide block (511) is inserted into a guide frame (512), and the guide frame (512) is connected to the upper support ring (602).

8. An automatic directional spraying system for a denitrification ammonia water spray gun, characterized in that: It comprises a denitrification ammonia water spray gun and a supporting mechanism (6) as mentioned in any one of claims 1 to 7, wherein the spray gun body (3) is connected to the inner wall of a flue gas treatment pipe (1) through the supporting mechanism (6), and the supporting mechanism (6) comprises a lower supporting plate (601) and an upper supporting ring (602), the lower supporting plate (601) and the upper supporting ring (602) are both in contact with the inner wall of the flue gas treatment pipe (1), and a plurality of vertical plates (603) are arranged between the lower supporting plate (601) and the upper supporting ring (602).

Images