Ammonia absorption tower waste gas purification and emission control device and use method thereof

Abstract

The invention discloses an ammonia absorption tower waste gas purification emission control device and a using method thereof.The ammonia absorption tower waste gas purification emission control device comprises a treatment tank and belongs to the technical field of waste gas treatment.The upper portion and the lower portion in the treatment tank are each provided with two partition plates, each partition plate is provided with a plurality of gas channels, and annular plates are arranged on the circumferential sides of the gas channels and provided with pressing plates; a layering plate is arranged between the two partition plates to divide the treatment tank into two working cavities; a discharge switching mechanism is arranged on the treatment tank, the discharge switching mechanism is connected with a pressing plate, and the pressing plate can be driven by the discharge switching mechanism to rotate; a dust filtering assembly is arranged between the two partition plates in the treatment tank, and the dust filtering assembly is arranged in the two working cavities and communicates with the multiple gas channels; a collecting assembly and a back flushing assembly are further arranged on the treatment tank, and both the collecting assembly and the back flushing assembly are communicated with the two working cavities where the dust filtering assembly is located. Through a double-region synchronous operation mechanism, a sealing switching mechanism, a deep back-blowing cleaning system and a multi-stage purification module, the waste gas treatment efficiency is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment, and particularly relates to an ammonia absorption tower waste gas purification and emission control device and a using method thereof. Background Art

[0002] In the prior art, during the operation of the waste liquid concentration device in the caprolactam workshop, it is detected that the VOC in the exhaust of the ammonia absorption tower and the exhaust of the process condensate storage tank exceeds the standard, and there is an obvious peculiar smell around the device. Further detection reveals that during the waste gas treatment process of the ammonia absorption tower, since most of the existing ammonia absorption tower waste gas treatment devices adopt the bag dust removal technology, the waste gas treatment effect is not good. The treated waste gas usually contains high concentrations of ammonia, nitrogen oxides, sulfur dioxide, and dust particles. The main reason is that during the traditional ammonia absorption tower waste gas treatment process, the bag is easily blocked, and the dust accumulates after long-term operation, resulting in an increase in pressure drop, leading to a reduction in the waste gas purification effect. In order to improve the purification effect, it is necessary to frequently stop the machine to clean the bag, which affects continuous production and cannot perform backwashing and cleaning of the bag simultaneously while filtering the waste gas, resulting in low waste gas purification efficiency.

[0003] Moreover, the current ammonia absorption tower waste gas treatment device also has the problem of low collection efficiency of waste gas particles. The traditional ammonia absorption tower waste gas treatment device mainly relies on gravity sedimentation to collect waste gas particles. Fine particles are easily escaped, and the dust collection is not thorough, requiring manual cleaning with a high frequency, which affects the purification efficiency.

[0004] In addition, the current ammonia absorption tower waste gas treatment device can only treat single pollutants. For example, waste gases such as nitrogen oxides and sulfur dioxide need to be treated separately additionally, with a complex system and high cost. Summary of the Invention Aiming at the problems existing in the prior art, the present invention provides an ammonia absorption tower waste gas purification and emission control device and a using method thereof, which are applicable to treating complex waste gases containing high concentrations of ammonia, nitrogen oxides, sulfur dioxide, and dust particles. Through an innovative dual-region synchronous operation mechanism, a sealing switching mechanism, a deep backwashing and cleaning system, and a multi-stage purification module, the problems of low efficiency, frequent shutdowns, and high maintenance costs in the prior art are solved, and the continuous, automated, and ultra-low emission of waste gas treatment are realized.

[0005] The technical solution of the present invention is as follows: In a first aspect of the present invention, there is provided an ammonia absorption tower waste gas purification and emission control device, including a treatment tank. Inside the treatment tank, two partition plates are respectively provided at the upper and lower parts. A plurality of gas channels are provided on the partition plates. A ring plate is provided on the periphery of the gas channels, and a pressing plate is provided on the ring plate. A layered plate is provided between the two partition plates to divide the treatment tank into two working chambers; an emission switching mechanism is provided on the treatment tank, and the emission switching mechanism is connected to the pressing plate, and the pressing plate can rotate under the drive of the emission switching mechanism; a dust filtering component is provided between the two partition plates inside the treatment tank, and the dust filtering component is respectively arranged in the two working chambers and communicated with a plurality of gas channels; a collection component and a back-blowing component are also provided on the treatment tank, and both the collection component and the back-blowing component are communicated with the two working chambers where the dust filtering component is located. In some embodiments of the present invention, the emission switching mechanism includes a side housing provided on one side of the treatment tank. A first motor is provided at the top of the side housing. The output end of the first motor is connected to a lead screw. The lead screw is connected to the upper and lower ends of the side housing through first bearings. Thread structures with opposite helix directions are provided at the upper and lower ends of the lead screw. The upper and lower ends of the lead screw are respectively connected to sliding blocks through the thread structures, and there are two sliding blocks. A limiting rod is provided inside the side housing. The upper and lower ends of the limiting rod respectively penetrate through the two sliding blocks and are slidably connected to the two sliding blocks. Tooth plates are provided on one side of the two sliding blocks. Gears are provided on one side of the two tooth plates. The two gears are meshed with the two tooth plates. Rotating rods are provided on one side of the two gears. The two rotating rods extend into the treatment tank and are connected to the inner wall of the treatment tank through sealing bearings. The ends of the two rotating rods extending into the treatment tank are connected to a pressing plate, and the pressing plate is in contact with the ring plate. A sealing ring is provided at the contact position between the ring plate and the pressing plate. In some embodiments of the present invention, the dust filtering component includes two layer plates. The two layer plates are arranged inside the treatment tank. A plurality of through holes are provided on the layer plates, and the plurality of through holes are communicated with the gas channels; a plurality of brackets are provided on the layer plates, and cloth bags are respectively provided on the plurality of brackets. In some embodiments of the present invention, the back-blowing component includes a bottom plate. The bottom plate is arranged outside the treatment tank. A first blower is provided on the bottom plate. The output end of the first blower is connected to a blowing pipe, and a first valve is provided on the blowing pipe; one end of the blowing pipe away from the first blower is divided into two paths and respectively extends into the two working chambers inside the treatment tank. The end of the blowing pipe in the working chamber is provided with a spray head, and the spray head is arranged above the dust filtering component. In some embodiments of the present invention, the collection assembly includes a dust exhaust pipe, which is divided into two paths and extends into two working chambers inside the treatment tank respectively. The end of the dust exhaust pipe far from the treatment tank is connected to a collection box. A second motor is provided on one side of the collection box close to the treatment tank. The output end of the second motor is connected to a rotating shaft, and an impeller is sleeved on the rotating shaft. The impeller is arranged inside the collection box; A filter screen is provided on the side of the collection box far from the treatment tank. A fan is provided on the side of the collection box where the filter screen is arranged. A dust collection box is installed at the bottom of the collection box. In some embodiments of the present invention, chucks are provided on both sides of the treatment tank. A sealing plate is provided between the chuck and the treatment tank, and a handle is provided on the sealing plate. In some embodiments of the present invention, a plurality of support legs are provided at the bottom of the treatment tank. In some embodiments of the present invention, a ventilation pipe is further connected to the bottom of the treatment tank. The end of the ventilation pipe far from the treatment tank is connected to a second blower. An exhaust gas inlet pipe is provided on the side of the bottom of the treatment tank far from the ventilation pipe. A hopper is further provided at the bottom of the treatment tank between the ventilation pipe and the exhaust gas inlet pipe. The bottom of the hopper is connected with a collection cylinder by threads. In some embodiments of the present invention, a negative pressure blower is provided at the top of the treatment tank. The negative pressure blower is connected to a clean gas pipe, the clean gas pipe is connected to an SCR denitration device, and the SCR denitration device is connected to a desulfurization device. In a second aspect of the present invention, a method for using an ammonia absorption tower exhaust gas purification and emission control device is provided, including: Exhaust gas is introduced into the treatment tank through the exhaust gas inlet pipe. The second blower and the ventilation pipe are started to pressurize and transport the exhaust gas inside the treatment tank. The negative pressure blower at the top of the treatment tank is started to generate a negative pressure suction force inside the treatment tank. The discharge switching mechanism opens the first working chamber and closes the second working chamber at the same time. The exhaust gas is filtered by the dust filtering assembly in the first working chamber. The clean gas after being filtered in the first working chamber is discharged into the SCR denitration device through the negative pressure blower and the clean gas pipe for treatment, and then enters the desulfurization device for treatment after being treated by the SCR denitration device; After filtering for a set time, the discharge switching mechanism closes the first working chamber and opens the second working chamber at the same time. The exhaust gas is filtered by the dust filtering assembly in the second working chamber. The back blowing assembly is started to blow air to the dust filtering assembly in the first working chamber, and the collection assembly is started to collect the particulate matter generated after the dust filtering assembly is blown and separated. The clean gas after being filtered in the second working chamber is discharged into the SCR denitration device through the negative pressure blower and the clean gas pipe for treatment, and then enters the desulfurization device for treatment after being treated by the SCR denitration device.

[0006] One or more technical solutions of the present invention have the following beneficial effects: An ammonia absorption tower waste gas purification and emission control device and its usage method provided by the present invention achieve the high efficiency, continuity, and environmental friendliness of waste gas treatment through multi-module collaborative design. The device takes "dual-region synchronous operation" as the core, combines sealing switching, backwashing cleaning, automatic collection, and multi-stage purification technologies, and solves the problems of low efficiency, frequent shutdowns, and high maintenance costs in traditional technologies. Among them, the design of alternating filtration and backwashing in the dual regions enables the device to operate without shutdown maintenance. While improving production efficiency, it integrates dust removal, denitrification, and desulfurization functions, enhances the comprehensive removal ability of pollutants, and the negative pressure fan and the dual regions cooperate to reduce the fan power consumption, and automatic collection reduces manual intervention.

[0007] The treatment tank is divided into two independent regions by a partition plate and a layered plate to achieve synchronous filtration and backwashing, significantly improving the treatment efficiency and avoiding shutdown maintenance. A pressing plate mechanism driven by a motor, combined with a sealing ring and a ring plate, quickly switches the working region and ensures the sealing performance to prevent waste gas leakage. The alternating operation of the dual regions reduces the fan power consumption; The backwashing assembly cooperates with the negative pressure fan and the impeller type dust collection box to achieve deep cleaning of the filter bag and automatic collection of dust, reducing manual intervention. By connecting SCR denitrification and desulfurization equipment in series, nitrogen oxides, sulfur dioxide, and particulate matter are removed integrally to meet the ultra-low emission standards. The detachable sealing plate and the threaded connection type dust collection cylinder design facilitate quick maintenance and cleaning, reducing the operation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the overall structure of an ammonia absorption tower waste gas purification and emission control device provided by Embodiment 1 of the present invention; Figure 2 It is a schematic diagram of the structure of the treatment tank provided by Embodiment 1 of the present invention; Figure 3 It is a schematic cross-sectional structure diagram of the side shell of the emission switching mechanism provided by Embodiment 1 of the present invention; Figure 4 It is a schematic cross-sectional view of the treatment tank provided by Embodiment 1 of the present invention Figure 1 ; Figure 5 It is a schematic cross-sectional view of the treatment tank provided by Embodiment 1 of the present invention Figure 2 ; Figure 6 It is a cross-sectional view of the dust filtering component provided by Embodiment 1 of the present invention; Figure 7 It is a schematic diagram of the collection component provided by Embodiment 1 of the present invention Figure 1 ; Figure 8 It is a schematic diagram of the collection component provided by Embodiment 1 of the present invention Figure 2 ; Figure 9Cross-sectional view of the collection component provided in Embodiment 1 of the present invention.

[0009] In the figure: 1, treatment tank; 2, support leg; 3, waste gas inlet pipe; 4, dust exhaust pipe; 5, collection box; 6, chuck; 7, sealing plate; 8, grip; 9, bottom plate; 10, first blower; 11, air blowing pipe; 12, negative pressure blower; 13, clean gas pipe; 14, ventilation pipe; 15, second blower; 16, SCR denitration equipment; 17, desulfurization equipment; 18, ash hopper; 19, collection cylinder; 20, side housing; 21, first motor; 22, lead screw; 23, sliding block; 24, toothed plate; 25, gear; 26, rotating rod; 27, pressing plate; 28, partition plate; 29, layered plate; 30, limiting rod; 31, layer plate; 32, through hole; 33, spray head; 34, sealing ring; 35, cloth bag; 36, gas passage; 37, ring plate; 38, support; 39, filter screen; 40, dust collection box; 41, second motor; 42, rotating shaft; 43, impeller; 44, fan. Detailed implementation manners

[0010] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0011] Embodiment 1 In a typical implementation manner of the present invention, as Figures 1 to 9 shown, an ammonia absorption tower waste gas purification and emission control device is proposed, including a treatment tank 1. Two partition plates 28 are fixedly arranged inside the treatment tank 1. A layered plate 29 is fixedly arranged between the two partition plates 28. Two gas passages 36 are opened on one side of the partition plate 28. Two ring plates 37 are fixedly arranged on one side of the partition plate 28. A dust filtering component is arranged inside the treatment tank 1. An emission switching mechanism is arranged on one side of the treatment tank 1. A collection component and a backwashing component are arranged on the outer surface of the treatment tank 1.

[0012] The emission switching mechanism includes a side housing 20. The side housing 20 is fixedly arranged on one side of the treatment tank 1. A first motor 21 is fixedly arranged on the top of the side housing 20. The output end of the first motor 21 is fixedly connected with a lead screw 22. The lead screw 22 is connected with the inner wall of the side housing 20 through a bearing. A limiting rod 30 is fixedly arranged inside the side housing 20. The thread directions of the two sides of the lead screw 22 are opposite. Two sliding blocks 23 are sleeved on the outer side of the lead screw 22 through threads. The limiting rod 30 penetrates through the sliding block 23 and is slidably connected with the sliding block 23. A toothed plate 24 is fixedly arranged on one side of each of the two sliding blocks 23. A gear 25 is arranged on one side of each of the two toothed plates 24. The gear 25 is meshed with the toothed plate 24. A rotating rod 26 is fixedly arranged on one side of each of the two gears 25. The two rotating rods 26 extend into the treatment tank 1 and are connected with the inner wall of the treatment tank 1 through a sealing bearing. Pressing plates 27 are fixedly arranged on the outer sides of the two rotating rods 26. The pressing plates 27 are in contact with the ring plates 37.

[0013] In this embodiment, the working area inside the treatment tank 1 is divided into two by the partition plate 28 and the layered plate 29. During operation, in one area, the waste gas is filtered by the cloth bag 35, and in the other area, the reverse blowing and dust removal of the cloth bag 35 is carried out synchronously. The first motor 21 is started, the first motor 21 controls the rotation of the lead screw 22, the lead screw 22 drives the sliding block 23 to move, the sliding block 23 drives the toothed plate 24 to move, the toothed plate 24 drives the gear 25 to rotate, the gear 25 drives the rotating rod 26 to rotate, and the rotating rod 26 drives the pressing plate 27 to rotate, so that the pressing plate 27 presses on the ring plates 37 at the top and bottom of the cloth bag 35 that intercepts excessive particulate matter and dust, thereby closing this area and reopening the other area for filtering work.

[0014] Wherein, in order to achieve the purpose of improving the seal, a sealing ring 34 is embedded on one side of the ring plate 37 to improve the sealing performance at the connection between the pressing plate 27 and the ring plate 37. The sealing performance at the connection between the pressing plate 27 and the ring plate 37 is improved through the sealing ring 34.

[0015] Wherein, in order to achieve the purpose of dust filtration, the dust filtration assembly includes two layer plates 31, the two layer plates 31 are fixedly arranged inside the treatment tank 1, a plurality of through holes 32 are formed on one side of the layer plate 31, a plurality of brackets 38 are fixedly installed on one side of the layer plate 31, and a cloth bag 35 is installed outside the bracket 38. The cloth bag 35 filters the waste gas, so that the particulate matter and dust in the waste gas are intercepted and filtered by the cloth bag 35.

[0016] Wherein, in order to achieve the purpose of reverse blowing, the reverse blowing assembly includes a bottom plate 9, the bottom plate 9 is fixedly arranged on one side of the treatment tank 1, a first blower 10 is fixedly arranged on the top of the bottom plate 9, the output end of the first blower 10 is fixedly connected with a blow pipe 11, both ends of the blow pipe 11 extend into the treatment tank 1, and spray heads 33 are fixedly connected to both ends of the blow pipe 11. The valve on the blow pipe 11 is controlled, and then the first blower 10 is started. The first blower 10 blows air through the blow pipe 11, and the gas is ejected through the spray heads 33. Subsequently, the cloth bag 35 is reversely blown, so that the particulate matter and dust on the outer surface of the cloth bag 35 are blown away.

[0017] Among them, for the purpose of collection, the collection component includes a dust exhaust pipe 4, the dust exhaust pipe 4 is fixedly connected to the treatment tank 1, one end of the dust exhaust pipe 4 is fixedly connected to a collection box 5, a second motor 41 is fixedly provided on one side of the collection box 5, the output end of the second motor 41 is fixedly connected to a rotating shaft 42, an impeller 43 is fixedly sleeved outside the rotating shaft 42, a filter screen 39 is installed on one side of the collection box 5, a fan 44 is installed on one side of the filter screen 39, and a dust collection box 40 is installed at the bottom of the collection box 5. Adjust the valve on the dust exhaust pipe 4, start the fan 44 on one side of the collection box 5, the fan 44 generates suction, so as to suck the scattered particulate matter and dust through the dust exhaust pipe 4. The particulate matter and dust are intercepted by the filter screen 39. Start the second motor 41, the second motor 41 controls the rotation of the rotating shaft 42, the rotating shaft 42 drives the impeller 43 to rotate, and the impeller 43 rotates and scrapes the particulate matter and dust intercepted by the filter screen 39 into the dust collection box 40 for centralized collection, which is convenient for cleaning.

[0018] Among them, for the purpose of transportation, a negative pressure fan 12 is installed on the top of the treatment tank 1, the output end of the negative pressure fan 12 is connected to a clean gas pipe 13, one end of the clean gas pipe 13 is connected to an SCR denitration device 16, and a desulfurization device 17 is connected to one side of the SCR denitration device 16. The negative pressure fan 12 on the top of the treatment tank 1 generates a negative pressure suction inside the treatment tank 1, so that the particulate matter and dust in the waste gas are intercepted and filtered by the cloth bag 35. The clean gas is discharged into the SCR denitration device 16 through the negative pressure fan 12 and the clean gas pipe 13. The SCR denitration device 16 is used to remove nitrogen oxides in the waste gas, and the desulfurization device 17 is connected to the SCR denitration device 16 to remove sulfur dioxide in the waste gas.

[0019] Among them, for the purpose of facilitating maintenance, chucks 6 are fixedly provided on both sides of the treatment tank 1, a sealing plate 7 is provided between the chuck 6 and the treatment tank 1, and a handle 8 is fixedly provided on one side of the sealing plate 7. Without affecting the work, by pulling the handle 8, the sealing plate 7 on one side of the closed area can be opened, and then the internal components can be repaired and replaced.

[0020] Among them, for the purpose of collection, a ash hopper 18 is provided at the bottom of the treatment tank 1, a collection cylinder 19 is threadedly connected inside the ash hopper 18, part of the dust particulate matter will fall at the bottom of the ash hopper 18 and be collected through the collection cylinder 19. The collection cylinder 19 can be rotated and opened for convenient cleaning.

[0021] Among them, in order to achieve the purpose of air intake, an air vent pipe 14 is installed on one side of the treatment tank 1. One end of the air vent pipe 14 is connected to a second blower 15. On the other side of the treatment tank 1, an exhaust gas inlet pipe 3 is fixedly provided. The alkali recovery furnace is used to fully burn the exhaust gas from the ammonia absorption tower and decompose the ammonia and other combustible components therein. The exhaust gas inlet pipe 3 is connected to the alkali recovery furnace, and the exhaust gas is discharged into the treatment tank 1 through the exhaust gas inlet pipe 3. At the same time, the exhaust gas inside the treatment tank 1 is pressurized and conveyed through the second blower 15 and the air vent pipe 14.

[0022] Among them, in order to achieve the purpose of support, a plurality of support legs 2 are fixedly provided at the bottom of the treatment tank 1, and the support legs 2 have the function of supporting the treatment tank 1.

[0023] The use process of the present invention is as follows: First, the working area inside the treatment tank 1 is divided into two by the partition plate 28 and the layered plate 29. During operation, in one area, the cloth bag 35 filters the exhaust gas, and in the other area, the back-blowing dust removal of the cloth bag 35 is carried out synchronously. When in use, the alkali recovery furnace is used to fully burn the exhaust gas from the ammonia absorption tower and decompose the ammonia and other combustible components therein. The exhaust gas inlet pipe 3 is connected to the alkali recovery furnace, and the exhaust gas is discharged into the treatment tank 1 through the exhaust gas inlet pipe 3. At the same time, the exhaust gas inside the treatment tank 1 is pressurized and conveyed through the second blower 15 and the air vent pipe 14. A negative pressure suction force is generated inside the treatment tank 1 through the negative pressure blower 12 at the top of the treatment tank 1, so that the particulate matter and dust in the exhaust gas are intercepted and filtered by the cloth bag 35. The clean gas is discharged into the SCR denitration device 16 through the negative pressure blower 12 and the clean gas pipe 13. The SCR denitration device 16 is used to remove nitrogen oxides NOx in the exhaust gas. The desulfurization device 17 is connected to the SCR denitration device 16 and is used to remove sulfur dioxide in the exhaust gas. When too much particulate matter and dust are intercepted on the surface of the cloth bag 35, resulting in a decrease in the conveying of the clean gas pipe 13, the first motor 21 is started. The first motor 21 controls the rotation of the lead screw 22. The lead screw 22 drives the sliding block 23 to move. The sliding block 23 drives the toothed plate 24 to move. The toothed plate 24 drives the gear 25 to rotate. The gear 25 drives the rotating rod 26 to rotate. The rotating rod 26 drives the pressing plate 27 to rotate, so that the pressing plate 27 presses on the ring plates 37 at the top and bottom of the cloth bag 35 that intercepts too much particulate matter and dust, thereby closing this area and reopening the other area for filtration work; Meanwhile, control the valve on the blow pipe 11, and then start the first blower 10. The first blower 10 blows air through the blow pipe 11, and the air is ejected through the nozzle 33. Subsequently, the cloth bag 35 is blown back, so that the particulate matter and dust on the outer surface of the cloth bag 35 are blown away. Adjust the valve on the dust exhaust pipe 4, and start the fan 44 on one side of the collection box 5. The fan 44 generates suction, so as to suck the dispersed particulate matter and dust through the dust exhaust pipe 4. The particulate matter and dust are intercepted by the filter screen 39. Start the second motor 41, and the second motor 41 controls the rotation of the rotating shaft 42. The rotating shaft 42 drives the impeller 43 to rotate. The impeller 43 rotates and scrapes the particulate matter and dust intercepted by the filter screen 39 into the dust collection box 40 for centralized collection, which is convenient for cleaning. Without affecting the work, the sealing plate 7 on one side of the closed area can be opened by pulling the handle 8, and then the internal components can be repaired and replaced.

[0024] Although the specific implementation manners of the present invention are described above in conjunction with the accompanying drawings, it is not a limitation on the protection scope of the present invention. Those skilled in the art should understand that, based on the technical solution of the present invention, various modifications or deformations that can be made by those skilled in the art without creative labor are still within the protection scope of the present invention.

Claims

1. An ammonia absorption tower exhaust gas purification emission control device, characterized in that: It comprises a processing tank, wherein two partitions are respectively provided on the upper and lower parts of the processing tank, wherein the partitions are provided with a plurality of gas channels, wherein a ring plate is provided on the periphery of the gas channel, wherein a pressure plate is provided on the ring plate, and a layering plate is provided between the two partitions to separate the processing tank into two working chambers; wherein an emission switching mechanism is provided on the processing tank, wherein the emission switching mechanism is connected to the pressure plate, and wherein the pressure plate can rotate under the drive of the emission switching mechanism; wherein a dust filter assembly is provided between the two partitions inside the processing tank, wherein the dust filter assembly is respectively arranged in the two working chambers and communicated with the plurality of gas channels; wherein a collecting assembly and a back-blowing assembly are also provided on the processing tank, wherein both the collecting assembly and the back-blowing assembly are communicated with the two working chambers where the dust filter assembly is located.

2. The ammonia absorption tower exhaust gas purification emission control device according to claim 1, characterized in that: The discharge switching mechanism comprises a side housing arranged at one side of the treatment tank, a first motor is arranged on the top of the side housing, a screw rod is connected to the output end of the first motor, the screw rod is connected to the upper and lower ends of the side housing through a first bearing, the upper and lower ends of the screw rod are provided with thread structures with opposite rotation directions, the upper and lower ends of the screw rod are respectively connected to sliding blocks through the thread structures, and two sliding blocks are provided; A limiting rod is provided inside the side housing, and the upper and lower ends of the limiting rod respectively penetrate the two sliding blocks and are slidably connected to the two sliding blocks; One side of the two sliding blocks is provided with a tooth plate, one side of the two tooth plates is provided with a gear, the two gears are meshed with the two tooth plates, one side of the two gears is provided with a rotating rod, the two rotating rods extend into the interior of the processing tank and are connected to the inner wall of the processing tank through a sealed bearing, one end of the two rotating rods extending into the interior of the processing tank is connected with a pressure plate, the pressure plate is arranged in contact with the ring plate, and a sealing ring is provided at the contact position between the ring plate and the pressure plate.

3. The ammonia absorption tower exhaust gas purification emission control device according to claim 1, characterized in that: The dust filter assembly includes two layer plates, which are arranged inside the processing tank. The layer plates are provided with a plurality of through holes, which are connected to the gas channel; the layer plates are provided with a plurality of brackets, and the plurality of brackets are respectively provided with cloth bags.

4. The ammonia absorption tower exhaust gas purification emission control device according to claim 1, characterized in that: The back-blowing assembly includes a base plate, which is arranged on the outside of the processing tank, and a first blower is arranged on the base plate. The output end of the first blower is connected to a blowing pipe, and a first valve is arranged on the blowing pipe; the end of the blowing pipe away from the first blower is divided into two paths and extends to two working chambers inside the processing tank respectively, and a nozzle is arranged at the end of the blowing pipe in the working chamber, and the nozzle is arranged above the dust filter assembly.

5. The ammonia absorption tower exhaust gas purification emission control device according to claim 1, characterized in that: The collecting assembly comprises a dust exhaust pipe, the dust exhaust pipe is divided into two paths and extends to two working chambers inside the processing tank respectively, one end of the dust exhaust pipe away from the processing tank is connected to the collecting box, a second motor is arranged on the side of the collecting box close to the processing tank, an output end of the second motor is connected to a rotating shaft, an impeller is sleeved on the rotating shaft, and the impeller is arranged in the collecting box; A filter is provided on the side of the collection box away from the processing tank, a fan is provided on the side of the collection box where the filter is provided, and a dust collection box is installed at the bottom of the collection box.

6. The ammonia absorption tower exhaust gas purification emission control device according to claim 1, characterized in that: Chucks are provided on both sides of the processing tank, a sealing plate is provided between the chuck and the processing tank, and a handle is provided on the sealing plate.

7. The ammonia absorption tower exhaust gas purification emission control device according to claim 1, characterized in that: The bottom of the processing tank is provided with a plurality of supporting legs.

8. The ammonia absorption tower exhaust gas purification emission control device according to claim 1, characterized in that: A ventilation pipe is also connected to the bottom of the treatment tank, and a second blower is connected to the end of the ventilation pipe away from the treatment tank. An exhaust gas inlet pipe is provided on the side of the bottom of the treatment tank away from the ventilation pipe. An ash hopper is also provided at the bottom of the treatment tank between the ventilation pipe and the exhaust gas inlet pipe, and the bottom of the ash hopper is threadedly connected to a collecting cylinder.

9. The ammonia absorption tower exhaust gas purification emission control device according to claim 1, characterized in that: A negative pressure fan is provided on the top of the treatment tank, the negative pressure fan is connected to a clean air pipe, the clean air pipe is connected to an SCR denitrification device, and the SCR denitrification device is connected to a desulfurization device.

10. The method for using the ammonia absorption tower exhaust gas purification emission control device according to any one of claims 1 to 9, characterized in that: include: The waste gas is introduced into the treatment tank through the waste gas inlet pipe, the second blower and the ventilation pipe are started to pressurize and transport the waste gas inside the treatment tank, the negative pressure fan on the top of the treatment tank is started to generate negative pressure suction inside the treatment tank, the discharge switching mechanism opens the first working chamber and closes the second working chamber at the same time, the waste gas is filtered by the dust filter assembly in the first working chamber, the clean gas filtered by the first working chamber is discharged into the SCR denitration equipment through the negative pressure fan and the clean air pipe for treatment, and then enters the desulfurization equipment for treatment after being treated by the SCR denitration equipment; After the set filtering time, the first working chamber is closed and the second working chamber is opened through the emission switching mechanism, the exhaust gas is filtered through the dust filter assembly in the second working chamber, the back-blowing assembly is started to blow the dust filter assembly in the first working chamber, and the collecting assembly is started to collect the particulate matter generated after the dust filter assembly is blown apart. The clean air filtered by the second working chamber is discharged into the SCR denitrification equipment through the negative pressure fan and the clean air pipe for treatment, and then enters the desulfurization equipment for treatment after being treated by the SCR denitrification equipment.

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