Boiler tail gas denitration reaction device

Abstract

The utility model provides a boiler tail gas denitration reaction device, which belongs to the technical field of thermal power plant boiler tail gas treatment and comprises a denitration tower, a plasma purifier and a chimney, a tail gas inlet is embedded in the side wall of the denitration tower, and the input end of a circulating water pump is embedded in a water storage area of an inner cavity of the denitration tower. The output end of the circulating water pump is provided with a spraying pipe extending to the inner cavity of the denitration tower, the inner cavity, close to the top, of the denitration tower is rotationally provided with a sealing partition plate, after tail gas is exhausted into the plasma purifier, the sealing partition plate is reset to the horizontal position through a reset type rotation adjusting mechanism, and the inner cavity of the denitration tower is closed again; the tail gas treatment device is simple in structure and convenient to operate, avoids forgetting to adjust the position of the sealing partition plate in the denitration tower when tail gas treatment is carried out again, ensures that the sealing partition plate can be reset to the horizontal position after treatment each time, further ensures that the sealing partition plate is located in a sealed space when entering the denitration tower for tail gas treatment each time, and improves the tail gas treatment effect.

Description

Technical Field

[0001] This utility model relates to the field of boiler exhaust gas treatment technology in thermal power plants, specifically a boiler exhaust gas denitrification reaction device. Background Technology

[0002] A thermal power plant, or coal-fired power plant for short, is a factory that uses combustible materials as fuel to produce electricity. Its basic production process is as follows: fuel burns to heat water and generate steam, converting the chemical energy of the fuel into heat energy. The steam pressure drives a turbine to rotate, converting the heat energy into mechanical energy. The turbine then drives a generator to rotate, converting the mechanical energy into electrical energy. In a thermal power plant, the boiler, as a crucial source of fuel output, produces a large amount of exhaust gas. If this exhaust gas is not properly treated, it will negatively impact the environment.

[0003] The related technology (publication number: CN220878282U) discloses a boiler exhaust gas denitrification device. The disclosed technical solution is as follows: the device can be flexibly moved and stably supported by the movable positioning component, which is convenient to meet the exhaust gas treatment needs of boilers of different sizes and locations. The activated carbon adsorption layer can be quickly disassembled and installed by the quick connection component, which is convenient to remove and replace the activated carbon adsorption layer and helps to maintain the exhaust gas treatment efficiency. It has the effects of flexible movement, stable support, quick disassembly and assembly, and simple and practicality.

[0004] The above-disclosed technical solutions reveal the following problems: After initial denitrification treatment, boiler exhaust gas from thermal power plants requires secondary purification. Due to the high frequency of boiler use in thermal power plants, a large amount of exhaust gas needs to be treated. During the initial treatment process, due to air flow, a small portion of the exhaust gas may enter the secondary purification equipment, thus affecting the denitrification effect. Subsequently, the exhaust gas will impact the environment. To address this, we propose a novel boiler exhaust gas denitrification reaction device.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background section of this application, and therefore may include prior art information that does not constitute prior art information known to those skilled in the art. Utility Model Content

[0006] This utility model aims to solve at least one of the technical problems existing in the prior art or related technologies. To address the boiler exhaust gas treatment problem in the prior art, this utility model provides a boiler exhaust gas denitrification reaction device, which adopts a leak-proof denitrification treatment structure combined with secondary purification equipment to improve the quality of exhaust gas treatment. Its specific technical solution is as follows:

[0007] A boiler flue gas denitrification reaction device includes a denitrification tower, a plasma purifier, and a chimney. A flue gas inlet is embedded in the side wall of the denitrification tower. The denitrification tower is connected to the plasma purifier via a connecting pipe, and the plasma purifier is connected to the chimney via a fan. A circulating water pump is installed on one side of the denitrification tower. The input end of the circulating water pump is embedded in a water storage area within the inner cavity of the denitrification tower. A spray pipe extending into the inner cavity of the denitrification tower is installed at the output end of the circulating water pump. A sealing baffle is rotatably installed in the inner cavity near the top of the denitrification tower. A reset-type rotary adjustment mechanism for driving the sealing baffle to rotate is installed on the outer wall of the denitrification tower.

[0008] In the above technical solution, the reset-type rotary adjustment mechanism includes a half gear rotatably mounted on the outer wall of the denitrification tower, a support base fixedly installed on the outer wall of the denitrification tower, a rack slidably mounted on the support base that meshes with the half gear, a gear meshing with the rack sleeved on the outside of the shaft of the sealing partition, and a spring-loaded component for resetting the rack after it disengages from the half gear.

[0009] The rebound assembly includes a bracket fixed to the side wall of the support base, a slide rod parallel to the rack is embedded in the bracket, a reset adjustment seat is sleeved on the outer wall of the slide rod, the reset adjustment seat is fixedly connected to the rack, and an elastic element sleeved on the outside of the slide rod is provided between the reset adjustment seat and the bracket.

[0010] The side wall of the support base is provided with a dovetail groove, and the side wall of the rack is provided with a dovetail slide bar opposite to the dovetail groove. The dovetail slide bar is slidably embedded into the inner cavity of the dovetail groove.

[0011] The bottom of the inner wall of the denitrification tower is provided with a bucket-shaped trough for collecting sludge, and the bottom of the inner wall of the bucket-shaped trough is provided with a sludge outlet. A sludge pipe connected to the sludge outlet is embedded in the bottom of the denitrification tower, and a valve is provided on the sludge pipe.

[0012] A column is fixedly installed at the bottom of the inner wall of the bucket-shaped trough, and a float is sleeved on the outside of the column.

[0013] The denitrification tower has an observation window on its side wall opposite to the column.

[0014] A water level sensor is embedded in the outer wall near the bottom of the denitrification tower, and the water level sensor is electrically connected to the circulating water pump.

[0015] The denitrification tower is connected to the plasma purifier via a connecting pipe, and the plasma purifier is connected to the chimney via a fan.

[0016] Compared with the prior art, the beneficial effects of this utility model are: the boiler exhaust gas denitrification reaction device:

[0017] 1. When performing preliminary denitrification treatment on boiler exhaust gas, the boiler exhaust gas is introduced into the inner cavity of the denitrification tower through the exhaust gas inlet. At this time, the sealing baffle is in a horizontal position through the reset rotary adjustment mechanism. The boiler exhaust gas is preliminarily treated in the space below the sealing baffle to prevent unpurified exhaust gas from flowing into the plasma purifier during the treatment process. By treating the exhaust gas in the space of the denitrification tower below the sealing baffle, it is ensured that the exhaust gas will not flow during purification.

[0018] Second, after the initial purification treatment, the sealing baffle is rotated on the inner wall of the denitrification tower by the reset rotary adjustment mechanism. As the sealing baffle rotates, the exhaust gas after the initial denitrification treatment enters the plasma purifier through the connecting pipe for secondary treatment. Through the initial treatment in the sealed space, the untreated exhaust gas is prevented from entering the subsequent treatment process, thereby ensuring the effect of boiler exhaust gas treatment.

[0019] Third, after the exhaust gas is discharged into the plasma purifier, the sealing baffle is reset to the horizontal position by the reset rotary adjustment mechanism. This avoids forgetting to adjust the position of the sealing baffle in the denitrification tower when treating the exhaust gas again, and ensures that the sealing baffle is reset to the horizontal position after each treatment. This ensures that the exhaust gas is in a sealed space every time it enters the denitrification tower for treatment, thus improving the exhaust gas treatment effect.

[0020] Fourth, after the exhaust gas is discharged into the plasma purifier, the sealing baffle is reset and rotated to the horizontal position, ensuring the airtightness of the space inside the denitrification tower. This ensures that when the exhaust gas is treated again, the boiler exhaust gas is in the space below the sealing baffle, preventing untreated exhaust gas from flowing into the plasma purifier. This prevents oversights in the operation process and ensures the effectiveness of boiler exhaust gas treatment.

[0021] Fifth, the sliding fit between the dovetail slide and the dovetail groove ensures the stability of the rack's movement direction and avoids positional deviation, thereby ensuring the accuracy of the rack and gear meshing and thus ensuring the stability of the sealing partition's rotation adjustment process.

[0022] 6. The observation window is made of transparent material. The float moves on the water surface according to the water level at the bottom. By observing the position of the float through the observation window, you can clearly understand the water level inside.

[0023] 7. When the water level reaches the inlet of the circulating water pump, the water level sensor transmits a signal to the circulating water pump, causing the circulating water pump to stop, thus protecting the circulating water pump. Attached Figure Description

[0024] Figure 1This is a schematic diagram of the denitrification treatment system of this utility model;

[0025] Figure 2 This is a schematic diagram of the denitrification tower part of this utility model;

[0026] Figure 3 This is a schematic diagram of the denitrification tower part of this utility model;

[0027] Figure 4 This is a cross-sectional view of a portion of the denitrification tower of this utility model;

[0028] Figure 5 This is a cross-sectional view of a portion of the denitrification tower of this utility model;

[0029] Figure 6 for Figure 5 Enlarged view of a portion at point A;

[0030] in, Figures 1 to 6 The correspondence between the reference numerals and component names in the attached drawings is as follows: 1-Denitrification tower, 2-Plasma purifier, 3-Chimney, 4-Fan, 5-Connecting pipe, 6-Circulating water pump, 7-Tail gas inlet, 8-Spray pipe, 9-Observation window, 10-Sewage pipe, 11-Valve, 13-Sealing partition, 14-Half gear, 15-Gear, 16-Support base, 17-Rack, 18-Column, 19-Water level sensor, 20-Float, 21-Sewage outlet, 22-Fish trough, 23-Limit block, 24-Shaft, 25-Machine cover, 26-Dovetail slide bar, 27-Dovetail slide groove, 28-Bracket, 29-Reset adjustment seat, 30-Motor, 31-Connecting rod, 32-Elastic element, 33-Slide rod. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] The following are specific implementation cases and appendices. Figure 1-6 The present invention will be further described below, but the present invention is not limited to these embodiments.

[0033] A boiler exhaust gas denitrification reactor includes a denitrification tower 1, a plasma purifier 2, and a chimney 3. An exhaust gas inlet 7 is embedded in the side wall of the denitrification tower 1. The exhaust gas inlet 7 is fixedly embedded in the side wall of the denitrification tower 1, connecting the exhaust gas inlet 7 to the inner cavity of the denitrification tower 1. The exhaust gas inlet 7 is connected to a boiler exhaust gas discharge pipe, allowing boiler exhaust gas to enter the interior of the denitrification tower 1 through the exhaust gas inlet 7. A water inlet is installed near the bottom of the denitrification tower 1, and two packing inlets are embedded in the side wall of the denitrification tower 1.

[0034] A circulating water pump 6 is installed on one side of the denitrification tower 1. The circulating water pump 6 is fixed to the same ground as the denitrification tower 1 by a frame and is electrically connected to an external power source via wires. The input end of the circulating water pump 6 is embedded in the water storage area inside the denitrification tower 1, and the output end of the circulating water pump 6 is provided with a spray pipe 8 extending into the inside of the denitrification tower 1. The circulating water pump 6 causes the water in the water storage area at the bottom of the denitrification tower 1 to be sprayed into the interior of the denitrification tower 1 through the spray pipe 8, allowing the water to be recycled during the boiler flue gas treatment process.

[0035] A sealing baffle 13 is rotatably installed in the inner cavity near the top of the denitrification tower 1. A reset-type rotary adjustment mechanism is installed on the outer wall of the denitrification tower 1 to drive the sealing baffle 13 to rotate. The reset-type rotary adjustment mechanism allows the sealing baffle 13 to rotate against the inner wall of the denitrification tower 1. When performing preliminary denitrification treatment on boiler exhaust gas, the boiler exhaust gas is introduced into the inner cavity of the denitrification tower 1 through the exhaust gas inlet 7. At this time, the sealing baffle 13 is in a horizontal position through the reset-type rotary adjustment mechanism, so that the sealing baffle 13 divides the inner cavity of the denitrification tower 1 into two parts.

[0036] The boiler exhaust gas undergoes preliminary treatment in the space below the sealing baffle 13 to prevent untreated exhaust gas from flowing into the plasma purifier 2. By treating the exhaust gas within the denitrification tower 1 space below the sealing baffle 13, it is ensured that the exhaust gas does not flow during purification. After preliminary purification, the sealing baffle 13 rotates on the inner wall of the denitrification tower 1 via a reset-type rotary adjustment mechanism. As the sealing baffle 13 rotates, the exhaust gas after preliminary denitrification treatment enters the plasma purifier 2 through the connecting pipe 5 for secondary treatment. This preliminary treatment within the sealed space prevents untreated exhaust gas from entering subsequent treatment processes, thus ensuring the effectiveness of boiler exhaust gas treatment.

[0037] After the exhaust gas is discharged into the plasma purifier 2, the resetting rotary adjustment mechanism resets the sealing baffle 13 to a horizontal position, resealing the inner cavity of the denitrification tower 1. This prevents forgetting to adjust the position of the sealing baffle 13 inside the denitrification tower 1 during subsequent exhaust gas treatments, ensuring that the sealing baffle 13 is reset to a horizontal position after each treatment. This, in turn, ensures that the exhaust gas is always within a sealed space when entering the denitrification tower 1 for treatment, thus improving the exhaust gas treatment efficiency.

[0038] The reset-type rotary adjustment mechanism includes a half-gear 14 rotatably mounted on the outer wall of the denitrification tower 1. Half of the half-gear 14 has teeth on its circumferential outer wall, while the other half is smooth. A motor 30 is fixed to the outer wall of the denitrification tower 1 via a cover 25, and the motor 30 is electrically connected to an external power source via wires. The half-gear 14 is fixedly sleeved onto the outside of the output shaft of the motor 30 through a central mounting hole. A support base 16 is fixedly mounted on the outer wall of the denitrification tower 1, and a rack 17 that meshes with the half-gear 14 is slidably mounted on the support base 16. The support base 16 is fixed at a position perpendicular to the half-gear 14, and the rack 17 slides against the surface of the support base 16. The position of the rack 17 ensures that half of the teeth of the half-gear 14 mesh with the rack 17.

[0039] A gear 15, which meshes with a rack 17, is sleeved on the outside of the shaft 24 of the sealing partition 13. Bearings are embedded in the inner walls on both sides of the denitrification tower 1. One end of each shaft 24 is fixed to one side of the sealing partition 13, and the two shafts 24 are collinear. The diameters of the two shafts 24 and the sealing partition 13 are collinear. The other ends of the two shafts 24 are embedded in the bearings and extend to the outside. The gear 15 is fixedly sleeved on the outer wall of the shaft 24 on the same side as the support base 16 through a central mounting hole. The gear 15 is spaced a certain distance from the half gear 14.

[0040] The support base 16 is equipped with a spring-loaded assembly for resetting the rack 17 after it disengages from the half-gear 14. After the exhaust gas enters the plasma purifier 2 by rotating the sealing partition 13, the half-gear 14 rotates. When the toothless outer wall of the half-gear 14 rotates to the position opposite the rack 17, the half-gear 14 disengages from the rack 17, and the spring-loaded assembly resets the rack 17. This causes the gear 15, meshing with the rack 17, to drive the sealing partition 13 to rotate via the shaft 24, bringing the sealing partition 13 to a horizontal position. This seals the top space of the denitrification tower 1, preventing any forgetting to seal the space during operation and ensuring the effectiveness of boiler exhaust gas treatment.

[0041] It is worth noting that the rebound assembly includes a bracket 28 fixed to the side wall of the support base 16, and a slide rod 33 parallel to the rack 17 is embedded in the bracket 28. The two brackets 28 are vertically fixed to the surface of the support base 16, and the two ends of the slide rod 33 are vertically fixed to the opposite surfaces of the two brackets 28. A reset adjustment seat 29 is sleeved on the outer wall of the slide rod 33. The reset adjustment seat 29 is movably sleeved on the outside of the slide rod 33 through a centrally opened mounting hole, so that the reset adjustment seat 29 slides against the outer wall of the slide rod 33.

[0042] The reset adjustment seat 29 is fixedly connected to the rack 17, and an elastic element 32 sleeved on the outside of the slide rod 33 is provided between the reset adjustment seat 29 and the bracket 28. The elastic element 32 can be a compression spring, and its two ends are respectively fixed to the opposite surfaces of the bracket 28 and the reset adjustment seat 29 located above. The elastic element 32 is movably sleeved on the outside of the slide rod 33, so that the elastic element 32 slides against the outer wall of the slide rod 33. As the output shaft of the motor 30 drives the half gear 14 to rotate, the half gear 14 drives the meshing rack 17 to move through the teeth on its outer circumference. At the same time, the rack 17 drives the shaft 24 to rotate through the meshing gear 15, so that the shaft 24 drives the sealing partition 13 to rotate. As the sealing partition 13 rotates, the exhaust gas that has undergone preliminary denitrification treatment flows into the interior of the plasma purifier 2.

[0043] During this process, rack 17 drives reset adjustment seat 29 to slide against the outer wall of slide rod 33 via connecting rod 31. As reset adjustment seat 29 moves, elastic element 32 generates elastic force. When the outer peripheral smooth surface of half gear 14 rotates to the position opposite rack 17, half gear 14 disengages from rack 17. The elastic force of elastic element 32 causes reset adjustment seat 29 to drive rack 17 to move via connecting rod 31. This causes gear 15 meshing with rack 17 to drive shaft 24 to rotate, which in turn causes shaft 24 to drive sealing partition 13 to rotate and reset.

[0044] After the exhaust gas is discharged into the plasma purifier 2, the sealing baffle 13 is reset and rotated to a horizontal position, ensuring the airtightness of the space inside the denitrification tower 1. This ensures that when the exhaust gas is treated again, the boiler exhaust gas is located in the space below the sealing baffle 13. This prevents untreated exhaust gas from flowing into the plasma purifier 2, thus preventing oversights in the operation process and ensuring the effectiveness of boiler exhaust gas treatment.

[0045] Furthermore, the side wall of the support base 16 is provided with a dovetail groove 27, and the side wall of the rack 17 is provided with a dovetail slide bar 26 opposite to the dovetail groove 27. The dovetail slide bar 26 slides into the inner cavity of the dovetail groove 27. A T-shaped dovetail groove 27 that does not penetrate the support base 16 is longitudinally formed on the surface of the support base 16 opposite to the rack 17, so that the dovetail slide bar 26 slides against the inner wall of the dovetail groove 27 during the movement of the rack 17.

[0046] The sliding fit between the dovetail slide 26 and the dovetail groove 27 ensures the stability of the movement direction of the rack 17 and avoids positional deviation, thereby ensuring the accuracy of the meshing between the rack 17 and the gear 15, and thus ensuring the stability of the rotation adjustment process of the sealing partition 13.

[0047] In addition, a bucket-shaped trough 22 for collecting sludge is provided at the bottom of the inner wall of the denitrification tower 1, and a sludge discharge port 21 is provided at the bottom of the inner wall of the bucket-shaped trough 22. A sludge discharge pipe 10 connected to the sludge discharge port 21 is embedded in the bottom of the denitrification tower 1, and a valve 11 is provided on the sludge discharge pipe 10. The support legs of the denitrification tower 1 are higher than the sludge discharge pipe 10, so that the sludge discharge pipe 10 is separated from the ground by a certain distance to ensure sufficient space for discharge and reception.

[0048] A drain outlet 21 is opened at the bottom of the inner wall of the trough 22 and at the position corresponding to the drain pipe 10. The drain pipe 10 is fixedly embedded in the bottom of the denitrification tower 1, so that the drain pipe 10 is connected to the drain outlet 21.

[0049] Furthermore, a column 18 is fixedly installed at the bottom of the inner wall of the trough 22, and a float 20 is sleeved on the outside of the column 18. The column 18 is vertically fixed at the center of the inner wall of the trough 22, and the float 20 is movably sleeved on the outside of the column 18 through a central mounting hole, allowing the float 20 to slide against the outer wall of the column 18. Drainage outlets 21 are distributed circumferentially on the outer side of the column 18. A limiting block 23 is fixedly installed at the top of the column 18 to prevent the float 20 from detaching from the column 18.

[0050] An observation window 9 is provided on the side wall of the denitrification tower 1, opposite to the column 18. The observation window 9 is made of transparent material. The float 20 floats on the water surface with the water volume at the bottom. By observing the position of the float 20 through the observation window 9, the internal water volume can be clearly understood.

[0051] A water level sensor 19 is embedded in the outer wall near the bottom of the denitrification tower 1. The water level sensor 19 is electrically connected to the circulating water pump 6. The water level sensor 19 is positioned at the same level as the inlet of the circulating water pump 6, and the internal water level is monitored by the water level sensor 19.

[0052] When the water level reaches the inlet of the circulating water pump 6, the water level sensor 19 transmits a signal to the circulating water pump 6, causing the circulating water pump 6 to stop, thus protecting the circulating water pump 6.

[0053] The denitrification tower 1 and the plasma purifier 2 are connected via a connecting pipe 5. One end of the connecting pipe 5 is embedded in the top of the denitrification tower 1, and the other end is embedded in the left inlet of the plasma purifier 2, thus connecting the two devices. The plasma purifier 2 is a low-temperature plasma device with a unique suction unit inside to trap and remove particulate matter from the exhaust gas. The multi-element gas collected by the exhaust gas collection system passes through the plasma active oxygen purification device. Under the action of the high-voltage plasma electric field, the initial-state oxygen is ionized, ionizing and charging the exhaust gas ions. The charged micro-ions (dust particles) are collected by the adsorption unit and flow into and deposit into the dust storage box of the gas treatment device. The harmful gases in the gas are sterilized by the ozone generated in the electric field, and the odor is removed. The harmful gases are thus eliminated, achieving the purpose of exhaust gas treatment.

[0054] The plasma purifier 2 and the chimney 3 are connected by a fan 4. The fan 4 is electrically connected to an external power source via a wire. The inlet of the fan 4 is connected to the right outlet of the plasma purifier 2 via a pipe, and the outlet of the fan 4 is connected to the chimney 3 via a pipe. The purified exhaust gas is drawn into the chimney 3 by the fan 4 and discharged to the outside through the chimney 3.

[0055] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0056] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0057] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0058] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A boiler exhaust gas denitrification reaction device, comprising a denitrification tower (1), a plasma purifier (2), and a chimney (3), characterized in that: The denitrification tower (1) has an embedded tail gas inlet (7) on its side wall. A circulating water pump (6) is provided on one side of the denitrification tower (1). The input end of the circulating water pump (6) is embedded in the water storage area inside the denitrification tower (1). The output end of the circulating water pump (6) is provided with a spray pipe (8) extending into the inside of the denitrification tower (1). A sealing partition (13) is rotatably provided in the inner cavity of the denitrification tower (1) near the top. A reset-type rotary adjustment mechanism that drives the sealing partition (13) to rotate is provided on the outer wall of the denitrification tower (1).

2. The boiler tail gas denitrification reaction device according to claim 1, characterized in that: The reset-type rotary adjustment mechanism includes a half gear (14) rotatably mounted on the outer wall of the denitrification tower (1), a support base (16) fixedly mounted on the outer wall of the denitrification tower (1), a rack (17) slidably mounted on the support base (16) and meshing with the half gear (14), a gear (15) meshing with the rack (17) sleeved on the outside of the shaft (24) of the sealing partition (13), and a spring-loaded assembly for resetting the rack (17) after it disengages from the half gear (14) on the support base (16).

3. The boiler tail gas denitrification reaction device according to claim 2, characterized in that: The rebound assembly includes a bracket (28) fixed to the side wall of the support base (16). A slide rod (33) parallel to the rack (17) is embedded in the bracket (28). A reset adjustment seat (29) is sleeved on the outer wall of the slide rod (33). The reset adjustment seat (29) is fixedly connected to the rack (17), and an elastic element (32) sleeved on the outside of the slide rod (33) is provided between the reset adjustment seat (29) and the bracket (28).

4. The boiler tail gas denitrification reaction device according to claim 2, characterized in that: The side wall of the support base (16) is provided with a dovetail groove (27), and the side wall of the rack (17) is provided with a dovetail slide bar (26) opposite to the dovetail groove (27). The dovetail slide bar (26) slides into the inner cavity of the dovetail groove (27).

5. The boiler tail gas denitrification reaction device according to claim 1, characterized in that: The bottom of the inner wall of the denitrification tower (1) is provided with a bucket-shaped trough (22) for collecting sludge. The bottom of the inner wall of the bucket-shaped trough (22) is provided with a drain outlet (21). The bottom of the denitrification tower (1) is embedded with a drain pipe (10) that communicates with the drain outlet (21). A valve (11) is provided on the drain pipe (10).

6. The boiler tail gas denitrification reaction device according to claim 5, characterized in that: A column (18) is fixedly installed at the bottom of the inner wall of the trough (22), and a float (20) is sleeved on the outside of the column (18).

7. A boiler exhaust gas denitrification reaction device according to claim 6, characterized in that: The denitrification tower (1) has an observation window (9) on its side wall opposite to the column (18).

8. The boiler tail gas denitrification reaction device according to claim 1, characterized in that: A water level sensor (19) is embedded in the outer wall near the bottom of the denitrification tower (1), and the water level sensor (19) is electrically connected to the circulating water pump (6).

9. The boiler tail gas denitrification reaction device according to claim 1, characterized in that: The denitrification tower (1) is connected to the plasma purifier (2) through a connecting pipe (5), and the plasma purifier (2) is connected to the chimney (3) through a fan (4).

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