An ammonia-containing exhaust gas treatment system

Abstract

This application relates to an ammonia-containing tail gas treatment system, belonging to the field of ammonia-containing tail gas treatment technology. It includes a tower body for treating ammonia-containing tail gas, with an inlet pipe for supplying the ammonia-containing tail gas and an exhaust port on the top wall of the tower body. It also includes a circulation device for conveying and recovering liquid that absorbs the ammonia-containing tail gas into the tower body, a spraying device for receiving the liquid from the circulation device and spraying the ammonia-containing tail gas into the tower body, a receiving plate for receiving the liquid, and a cleaning device for cleaning salt from the receiving plate. The advantages of this application are that it can reduce residual salt in the tower body and can replace manual cleaning by workers, improving cleaning efficiency.

Description

Technical Field

[0001] This application relates to the field of ammonia-containing exhaust gas treatment technology, and in particular to an ammonia-containing exhaust gas treatment system. Background Technology

[0002] Ammonia is a colorless, toxic, highly reactive, and corrosive gas with a strong odor. It severely irritates the mucous membranes of humans and animals, such as the eyes and respiratory tract, and can be fatal within minutes at high concentrations. Ammonia is used or generated in various chemical industries, including petrochemicals, food processing, papermaking, textiles, wastewater treatment, sludge treatment, and fertilizer manufacturing.

[0003] Chinese Patent CN210631924U discloses an ammonia-containing tail gas recovery and treatment device, including a tower body, a hydrochloric acid pool at the bottom of the tower body, an exhaust port at the top of the tower body, and a demister, a primary spray device, and a secondary spray device arranged sequentially from top to bottom between the top and bottom of the tower body. The spray pipe of the primary spray device is connected to the water inlet pipe outside the tower body. The secondary spray device is connected to the bottom of the hydrochloric acid pool through a pipe located outside the tower body, and a heat exchanger, a three-way valve, and a circulating pump are arranged sequentially on the pipe. The remaining port of the three-way valve is connected to a storage tank through a pipe. An ammonia-containing tail gas inlet and a hydrochloric acid inlet are provided on the side wall of the tower body below the secondary spray device.

[0004] When using the above-mentioned recycling and treatment device, hydrochloric acid is pumped into the tower using a circulating pump and sprayed into the tower through a spraying device. However, after using the recycling and treatment device for a long time, salt tends to form at the bottom of the tower, which is difficult to clean. Summary of the Invention

[0005] To address the issue of salt residue easily remaining at the bottom of the tower and being difficult to clean, this application provides an ammonia-containing tail gas treatment system.

[0006] The ammonia-containing exhaust gas treatment system provided in this application adopts the following technical solution:

[0007] An ammonia-containing exhaust gas treatment system includes a tower body for treating ammonia-containing exhaust gas, wherein the tower body is provided with an inlet pipe for inputting the ammonia-containing exhaust gas, and an exhaust port is provided on the top wall of the tower body.

[0008] It also includes a circulation device for conveying and recovering ammonia-containing tail gas liquid into the tower body, a spraying device for receiving liquid input from the circulation device and spraying ammonia-containing tail gas into the tower body, a receiving plate for receiving liquid into the tower body, and a cleaning device for cleaning salt from the receiving plate into the tower body.

[0009] By adopting the above technical solution, when it is necessary to absorb ammonia-containing tail gas in the tower, the ammonia-containing tail gas is transported to the spraying device using a circulation device. The spraying device sprays liquid into the tower, and the liquid absorbs the ammonia in the tail gas. The circulation device then recycles the liquid for reuse. After long-term use of the tower to absorb ammonia, salt residue forms on the receiving plate. At this time, the salt on the receiving plate is cleaned using a cleaning device, which can reduce the residual salt in the tower and replace manual cleaning by workers, thus improving cleaning efficiency.

[0010] In one specific implementation, the circulation device includes a storage tank, a delivery pump, and a circulation pump. An inlet pipe is provided between the outlet of the storage tank and the inlet of the delivery pump, and an outlet pipe is provided at the outlet of the delivery pump. The outlet pipe is connected to the spraying device.

[0011] A delivery pipe is provided between the liquid inlet of the storage tank and the liquid outlet of the circulation pump. The liquid inlet of the circulation pump is provided with a discharge pipe. The end of the discharge pipe away from the circulation pump is inserted into the tower body. The end of the discharge pipe inserted into the tower body is located on the side close to the receiving plate. The receiving plate is provided with a guide slope. The distance between the guide slope and the bottom wall of the tower body increases from the side close to the discharge pipe to the side away from the discharge pipe.

[0012] By adopting the above technical solution, the liquid in the storage tank is pumped into the spraying device along the inlet and outlet pipes using a delivery pump. After the spraying device sprays out the liquid, it falls onto the receiving plate and then flows along the inclined receiving plate to the discharge pipe side. The circulation pump then transports the liquid in the tower back to the storage tank along the discharge pipe and delivery pipe. In this way, the liquid can be recycled. Moreover, due to the inclined receiving plate, it is convenient for the liquid to flow to the side close to the discharge pipe, minimizing the residual liquid in the tower and improving the utilization rate of the liquid. It can also reduce the salt precipitation caused by the liquid remaining on the receiving plate.

[0013] In one specific implementation, grooves are provided on both of the opposite inner sidewalls of the tower body;

[0014] The cleaning device includes a drive motor mounted on the outer wall of the tower body. The motor shaft of the drive motor is coaxially provided with a rotating screw. The rotating screw is inserted into one of the slide grooves away from the drive motor and is rotatably connected to the tower body. A slider is threaded to one end of the rotating screw that passes through the slide groove. A smooth rod is provided in the other slide groove. A sliding block is slidably connected to the smooth rod. A scraper is provided between the slider and the sliding block. A receiving groove for installing the scraper is provided on the inner wall of the tower body. The receiving groove is arranged along the inclined direction of the guide slope.

[0015] By adopting the above technical solution, when salt is precipitated on the receiving plate, the drive motor drives the rotating screw to rotate, which in turn drives the scraper to move along the rotating rod. The scraper pushes the salt on the receiving plate forward, thereby removing the salt from the receiving plate.

[0016] In one specific implementation scheme, the receiving plate has a cavity, and the top wall of the receiving plate has a plurality of through holes communicating with the cavity. A power motor is provided in the cavity, and a lifting screw is provided on the motor shaft of the power motor. A lifting block is threadedly connected to the lifting screw, and a groove is provided on the side of the lifting block near the through holes.

[0017] A movable plate is slidably disposed within the receiving plate. A fixed block is disposed on the movable plate and passes through a through hole. The fixed block contacts the side wall of the through hole. Both sides of the fixed block are provided with extrusion slopes for the scraper to push. A movable block is disposed on the side of the movable plate away from the fixed block. The side of the movable block away from the movable plate is inserted into the groove and slidably connected to the groove. A supporting spring is disposed between the movable block and the bottom wall of the groove. A rotating hole is provided on the movable block for the insertion of a lifting screw.

[0018] By adopting the above technical solution, when liquid falls onto the receiving plate and flows along the guide slope towards the discharge pipe, the liquid is intercepted by the fixed block. Near the fixed block, more salt is easily precipitated, forming salt blocks. One side of the salt block adheres to the receiving plate, and the other side adheres to the side wall of the fixed block. When the scraper scrapes the receiving plate, the power motor first drives the lifting screw to move downward, which in turn moves the lifting block and the moving block downward, thereby moving the moving plate and the fixed block downward. The fixed block can then detach from the salt block, and the scraper then removes the receiving plate. When encountering the fixed block, the scraper pushes and squeezes the slope, pushing the fixed block and the moving plate to move in the groove. The support spring is compressed and stores force, and the scraper thus pushes the salt and salt blocks on the receiving plate to move. On the one hand, the interception of liquid by the fixed block makes it easier to form salt blocks, which are easier to scrape than the salt on the receiving plate. On the other hand, after the fixed block detaches from the salt block, it is convenient for the scraper to push the salt block off the receiving plate, improving the efficiency of the scraper in cleaning the salt on the receiving plate.

[0019] In one specific implementation, the scraper is provided with a connecting frame on the side away from the receiving plate, the connecting frame is provided with a brush plate with a plurality of bristles, the connecting frame is provided with a scraper plate, and the scraper is located between the brush plate and the scraper plate.

[0020] By adopting the above technical solution, when the scraper scrapes the receiving plate and there is residue left on the receiving plate, the brush bristles and scraper behind the scraper are used to clean the receiving plate again, which can improve the cleaning effect. Moreover, when moving the scraper and scraper, the brush plate is moved by the scraper and scraper, and the scraper and scraper push and squeeze the inclined surface, which can minimize the possibility of the brush bristles being popped out by the fixed block and breaking.

[0021] In one specific implementation, the receiving plate is provided with a discharge trough for salt to fall into, and the discharge trough is located on the side of the receiving plate away from the receiving trough;

[0022] A receiving box is rotatably provided in the material discharge chute, and a driving component for driving the receiving box to rotate is provided on the outer side wall of the tower body. The receiving box has a receiving cavity with a through groove, and a discharge plate is provided on the side wall of the tower body. The side of the receiving box away from the driving component is rotatably connected to the discharge plate.

[0023] When the driving component drives the receiving box to rotate until the through groove faces the discharge groove, the through groove and the discharge groove are connected; when the driving component drives the receiving box to rotate until the through groove and the discharge groove are misaligned, the receiving box rotates out of the discharge groove and blocks the discharge groove.

[0024] By adopting the above technical solution, when the scraper pushes the salt and salt blocks to the edge of the receiving plate, the drive unit drives the receiving box to rotate, thereby rotating the through trough to face the discharge trough. The scraper can then smoothly push the salt and salt blocks along the discharge trough and through trough into the receiving cavity, and finally discharge them along the discharge plate. This achieves automatic cleaning of the salt out of the tower, which can replace manual cleaning by workers, reduce the workload of workers, and improve work efficiency.

[0025] Furthermore, because the receiving plate has a guide slope, the receiving box is also tilted, which makes it easier for salt and salt blocks to be discharged along the receiving box.

[0026] In one specific implementation, the receiving box extends out of the tower body, a blower is provided outside the tower body, an air outlet pipe is provided at the air outlet of the blower, the air outlet pipe is rotatably connected to the receiving box away from the blower, and a ventilation hole communicating with the air outlet pipe is provided on the wall of the material discharge trough.

[0027] The driving component includes a rotating motor mounted on the tower body, a rotating rod coaxially mounted on the rotating motor, a driving conical wheel at one end of the rotating rod inserted into the air outlet pipe, and a driven shaft coaxially mounted at one end of the receiving box near the air outlet pipe, with a driven conical wheel meshing with the driving conical wheel on the driven shaft.

[0028] By adopting the above technical solution, when discharge is required, the rotating motor drives the drive rotating rod, drive cone wheel, driven shaft and driven cone wheel to rotate, so that the through groove of the receiving box can be rotated to face the side of the discharge trough; when salt and salt blocks fall into the receiving box, the blower blows air into the receiving box along the air outlet pipe and ventilation hole, blowing the salt and salt blocks quickly along the receiving box and discharge plate to improve the efficiency of salt discharge.

[0029] In one specific implementation, the spraying device includes at least two branch pipes connected to the liquid outlet pipe, with one end of the branch pipe away from the liquid outlet pipe extending into the tower body, and a plurality of nozzles provided at the end of the branch pipe extending into the tower body, the nozzles facing the side of the air inlet pipe.

[0030] By adopting the above technical solution, the delivery pump transports the liquid along the outlet pipe to the branch pipe, and the nozzle then sprays the liquid out, thereby absorbing ammonia gas inside the tower.

[0031] In summary, this application includes at least one of the following beneficial technical effects: First, the ammonia-containing tail gas is transported to the spraying device using a circulation device, and then the spraying device sprays liquid into the tower body. The liquid absorbs the ammonia in the ammonia-containing tail gas, and the circulation device then recovers the liquid for reuse. After long-term use of the tower body to absorb ammonia, salt particles are formed on the receiving plate. The salt on the receiving plate is cleaned by a cleaning device, which can replace manual cleaning by workers and improve cleaning efficiency. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of an ammonia-containing tail gas treatment system according to an embodiment of this application.

[0033] Figure 2 It is along Figure 1 A cross-sectional view along line AA in the middle.

[0034] Figure 3 It is along Figure 1 A cross-sectional view along the BB line.

[0035] Figure 4 It is along Figure 1 A cross-sectional view of the CC line.

[0036] Figure 5 yes Figure 4 Enlarged view of section A.

[0037] Explanation of reference numerals in the attached drawings: 1. Tower body; 10. Air inlet pipe; 11. Exhaust port; 12. Slide groove; 13. Receiving tank; 14. Packing layer; 2. Circulation device; 20. Liquid storage tank; 21. Transfer pump; 22. Circulation pump; 23. Liquid inlet pipe; 24. Liquid outlet pipe; 25. Transfer pipe; 26. Discharge pipe; 3. Spraying device; 30. Branch pipe; 31. Spray head; 4. Receiving plate; 40. Guide slope; 41. Cavity; 42. Through hole; 43. Power motor; 44. Lifting screw; 45. Lifting block; 47. Groove; 48. Moving plate; 49. Fixed block; 400. Extrusion slope; 401. Moving block; 402. Support spring; 40 3. Rotating hole; 404. Material chute; 405. Receiving box; 406. Rotating motor; 407. Receiving cavity; 408. Through groove; 409. Discharge plate; 410. Blower; 411. Air outlet pipe; 412. First hole group; 413. Second hole group; 414. Driving component; 415. Ventilation hole; 416. Rotating rod; 417. Driving cone wheel; 418. Driven shaft; 419. Driven cone wheel; 420. Discharge hole; 5. Cleaning device; 50. Drive motor; 51. Rotating screw; 52. Slider; 53. Polished rod; 54. Sliding block; 55. Scraper; 56. Connecting frame; 57. Brush plate; 58. Brush bristles; 59. Shovel plate. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0039] This application discloses an ammonia-containing exhaust gas treatment system.

[0040] Reference Figure 1 and Figure 2 An ammonia-containing tail gas treatment system includes a tower body 1, a circulation device 2, a spraying device 3, and a cleaning device 5.

[0041] The tower body 1 is used to treat ammonia-containing tail gas. The side wall of the tower body 1 is provided with an inlet pipe 10 for the input of ammonia-containing tail gas, the top wall of the tower body 1 is provided with an exhaust port 11, and the tower body 1 is provided with a receiving plate 4 for receiving liquid.

[0042] The circulation device 2 is used to transport and absorb the ammonia-containing tail gas liquid into the tower body 1 and recycle it for reuse. The spray device 3 is used to receive the liquid input from the circulation device 2 and spray the ammonia-containing tail gas. The cleaning device 5 is used to clean the salt precipitated on the receiving plate 4.

[0043] First, the ammonia-containing tail gas is introduced into the tower body 1 through the inlet pipe 10. The circulation device 2 sends the liquid to the spray device 3, which sprays the liquid onto the receiving plate 4. The liquid absorbs the ammonia in the tail gas and then discharges the gas. After long-term use of the tower body 1, salt will precipitate on the receiving plate 4. The cleaning device 5 is used to clean the salt on the receiving plate 4, which can reduce the amount of salt on the receiving plate 4 and also replace manual cleaning by workers, reducing the workload of workers and improving work efficiency.

[0044] Reference Figure 2 The circulation device 2 includes a delivery pump 21, a circulation pump 22, and a liquid storage tank 20 disposed on one side of the tower body 1. The delivery pump 21 is disposed on the top wall of the liquid storage tank 20. An inlet pipe 23 is provided between the liquid outlet of the liquid storage tank 20 and the liquid inlet of the delivery pump 21. An outlet pipe 24 is provided at the liquid outlet of the delivery pump 21. The outlet pipe 24 is disposed along the height direction of the tower body 1.

[0045] The spray device 3 includes at least two branch pipes 30 connected to the liquid outlet pipe 24. In this embodiment, there are two branch pipes 30. The end of the branch pipe 30 away from the liquid outlet pipe 24 extends into the tower body 1. The end of the branch pipe 30 extending into the tower body 1 is provided with a plurality of nozzles 31. The nozzles 31 face the side of the air inlet pipe 10. The tower body 1 is provided with two packing layers 14. The packing layers 14 correspond one-to-one with the branch pipes 30 and are located below the branch pipes 30. In this embodiment, the packing in the packing layer 14 can be a Pall ring packing layer or a multi-faceted hollow sphere packing layer.

[0046] A delivery pipe 25 is provided between the liquid inlet of the liquid storage tank 20 and the liquid outlet of the circulation pump 22. The liquid inlet of the circulation pump 22 is provided with a discharge pipe 26. The end of the discharge pipe 26 away from the circulation pump 22 is inserted into the tower body 1. The end of the discharge pipe 26 inserted into the tower body 1 is located on the side close to the receiving plate 4. The receiving plate 4 is provided with a guide slope 40. The distance between the guide slope 40 and the bottom wall of the tower body 1 increases from the side close to the discharge pipe 26 to the side away from the discharge pipe 26.

[0047] During ammonia absorption, the transfer pump 21 transports the liquid in the storage tank 20 along the inlet pipe 23 and the outlet pipe 24 to the branch pipe 30. The nozzle 31 sprays the liquid out, allowing the liquid to absorb ammonia. The liquid falls onto the receiving plate 4 and flows along the receiving plate 4 to the discharge pipe 26. The circulation pump 22 transports the liquid in the tower body 1 along the discharge pipe 26 to the transfer pipe 25, and finally into the storage tank 20, so that the liquid can be recycled.

[0048] Reference Figure 2 The tower body 1 has two opposite inner sidewalls with sliding grooves 12, which are located on both sides of the support plate 4.

[0049] Reference Figure 2 and Figure 3The cleaning device 5 includes a drive motor 50 mounted on the outer wall of the tower body 1. The drive motor 50 is positioned away from the discharge pipe 26. A rotating screw 51 is coaxially mounted on the motor shaft of the drive motor 50. The rotating screw 51, away from the drive motor 50, is inserted into one of the slide grooves 12 and rotatably connected to the tower body 1. A slider 52 is threadedly connected to one end of the rotating screw 51 that passes through the slide groove 12. A smooth rod 53 is mounted in the other slide groove 12. A sliding block 54 is slidably connected to the smooth rod 53. A scraper 55 is provided between the 2 and the sliding block 54. The bottom of the scraper 55 is provided with a pointed tip. A connecting frame 56 is provided on the side of the scraper 55 away from the receiving plate 4. A brush plate 57 and a shovel plate 59 are respectively provided on the connecting frame 56. The brush plate 57 is located between the scraper 55 and the shovel plate 59. Several bristles 58 are provided on the side of the brush plate 57 near the receiving plate 4. A receiving groove 13 for installing the scraper 55 and the brush plate 57 is provided on the inner wall of the tower body 1. The receiving groove 13 is set along the inclined direction of the guide slope 40.

[0050] Reference Figure 3 The receiving plate 4 has a cavity 41 inside, and the top wall of the receiving plate 4 has a number of first hole groups 412 and second hole groups 413 that communicate with the cavity 41.

[0051] Several first hole groups 412 and several second hole groups 413 are arranged at intervals along the inclined direction of the receiving plate 4. The second hole group 413 is located between two adjacent first hole groups 412. Each first hole group 412 and second hole group 413 includes several through holes 42. The through holes 42 of the first hole group 412 and the through holes 42 of the second hole group 413 are arranged alternately. The distance between adjacent through holes 42 of the first hole group 412 is less than the width of the through holes 42 of the second hole group 413.

[0052] A power motor 43 is provided inside the cavity 41. A lifting screw 44 is provided on the motor shaft of the power motor 43. The axis of the lifting screw 44 is perpendicular to the plane of the receiving plate 4. A lifting block 45 is threadedly connected to the lifting screw 44. A groove 47 is provided on the side of the lifting block 45 near the through hole 42.

[0053] A movable plate 48 is slidably provided inside the receiving plate 4. A fixed block 49 is provided on the movable plate 48 that passes through the through hole 42. The outer wall of the fixed block 49 contacts the hole wall of the through hole 42. The length of the fixed block 49 is greater than the distance between the scraper 55 and the brush plate 57.

[0054] The top wall of the fixed block 49 is provided with two extrusion slopes 400 for the scraper 55 to push. The two extrusion slopes 400 are set opposite to each other, one of which faces the receiving groove 13 and the other is away from the receiving groove 13. The side of the moving plate 48 away from the fixed block 49 is provided with a moving block 401. The side of the moving block 401 away from the moving plate 48 is inserted into the groove 47 and slidably connected to the groove 47. A support spring 402 is provided between the moving block 401 and the bottom wall of the groove 47. The moving block 401 is provided with a rotating hole 403 for the lifting screw 44 to be inserted.

[0055] refer to Figure 4 and Figure 5 The receiving plate 4 is provided with a feeding trough 404 for salt to fall into. The width of the feeding trough 404 is greater than or equal to the distance between the scraper 55 and the shovel 59. The feeding trough 404 is located on the side of the receiving plate 4 away from the receiving trough 13.

[0056] A receiving box 405 is rotatably provided inside the material chute 404. The receiving box 405 extends out of the tower body 1 on the side closer to the receiving plate. A receiving cavity 407 is provided inside the receiving box 405. A through groove 408 is provided in the receiving cavity 407. A driving component 414 for driving the receiving box 405 to rotate is provided on the outer wall of the tower body 1.

[0057] A frame is provided outside the tower body 1. The frame extends out of the tower body 1 near the receiving box 405. A blower 410 is provided on the frame. An air outlet pipe 411 is provided at the air outlet of the blower 410. A bearing is provided at the end of the receiving box 405 that extends out of the tower body 1. The air outlet pipe 411 is connected to the inner wall of the bearing. A plurality of ventilation holes 415 communicating with the air outlet pipe 411 are provided on the side of the receiving cavity 407 near the air outlet pipe 411.

[0058] The driving component 414 includes a rotating motor 406 disposed on the outer wall of the tower body 1. The rotating motor 406 is coaxially provided with a rotating rod 416. One end of the rotating rod 416 inserted into the air outlet pipe 411 is provided with a driving cone wheel 417. One end of the receiving box 405 near the air outlet pipe 411 is coaxially provided with a driven shaft 418. The driven shaft 418 is provided with a driven cone wheel 419 that meshes with the driving cone wheel 417.

[0059] A discharge plate 409 is rotatably provided on the side of the receiving box 405 away from the rotating motor 406. In this embodiment, the discharge plate 409 is arc-shaped and the opening of the discharge plate 409 faces the top wall of the tower body 1. The side wall of the tower body 1 is provided with a discharge hole 420 for the discharge plate 409 to extend out. The discharge plate 409 is connected to the receiving cavity 407.

[0060] When the rotating motor 406 drives the receiving box 405 to rotate until the through groove 408 faces the discharge groove 404, the through groove 408 and the discharge groove 404 are connected; when the rotating motor 406 drives the receiving box 405 to rotate until the through groove 408 and the discharge groove 404 are misaligned, the receiving box 405 rotates out of the discharge groove 404 and blocks the discharge groove 404.

[0061] A blower 410 is provided on the tower body 1. The blower 410 is located on the side near the rotating motor 406. The air outlet of the blower 410 is provided with an air outlet pipe 411. The air outlet pipe 411 is inserted into the tower body 1 and extends into the receiving box 405. The air outlet pipe 411 is rotatably connected to the receiving box 405.

[0062] The staggered through holes 42 allow liquid falling onto the receiving plate 4 to be intercepted. The side of the fixing block 49 away from the discharge pipe 26 can accumulate more salt particles to form salt blocks, which reduces the problem of salt particles spreading on the receiving plate 4, making the receiving plate 4 difficult to clean.

[0063] When it is necessary to clean the receiving plate 4, the drive assembly drives the rotating screw 51 to rotate, which in turn drives the scraper 55 to move. The scraper 55 drives the brush 57 to move. The scraper 55 scrapes the receiving plate 4, while the brush 58 brushes the receiving plate 4. This double cleaning of the receiving plate 4 improves the efficiency of cleaning the receiving plate 4 and minimizes the presence of residual salt particles.

[0064] Before the scraper 55 encounters the fixed block 49, the power motor 43 drives the lifting screw 44 to move downward, which in turn moves the moving plate 48 and the fixed block 49 downward. When the fixed block 49 moves downward, it separates from the salt block, which reduces the difficulty for the scraper 55 to clean the salt block. When the scraper 55 moves to the fixed block 49, the scraper 55 pushes and squeezes the inclined surface 400, which drives the fixed block 49 and the moving plate 48 to move downward. The moving block 401 squeezes the support spring 402 to move downward, and the scraper 55 and the brush plate 57 can then clean the receiving plate 4.

[0065] Because the width of the fixing block 49 is greater than the distance between the scraper 55 and the brush plate 57, and the distance between adjacent through holes 42 of the first hole group 412 is less than the width of the through holes 42 of the second hole group 413; when the scraper 55 moves below the fixing block 49 in the through holes 42 of the first hole group 412, the scraper plate 59 will press down on the fixing block 49. When the scraper plate 59 moves down from the fixing block 49, the scraper 55 will press down on the fixing block 49 in the through holes 42 of the second hole group 413. This can minimize the possibility that after the scraper 55 and the scraper plate 49 leave the fixing block 49, the fixing block 49 will pop out again, causing the bristles 58 on the brush plate 57 to be folded, which may cause the bristles 58 to break easily.

[0066] When the scraper 55 drives the brush 57 to move the salt grains and salt blocks to the front of the discharge trough 404, the rotating motor 406 drives the receiving box 405 to rotate, so that the through trough 408 faces the discharge trough 404. The scraper 55 and the brush 57 scrape the salt grains and salt blocks into the through trough 408, and then they fall into the receiving box 405 along the through trough 408. Finally, they are output along the receiving box 405 and the discharge plate 409. This can realize automatic cleaning and discharge of salt grains, replacing the manual cleaning method of workers and improving work efficiency.

[0067] Furthermore, when discharging salt particles, the blower 410 is started, and the blower 410 blows air into the receiving box 405, which can reduce the possibility of salt particles and salt blocks remaining in the receiving box 405.

[0068] When cleaning is not required, rotating motor 406 drives receiving box 405 to rotate. Receiving box 405 rotates and seals the discharge chute 404, which can reduce the possibility of liquid seeping out of discharge chute 404 and causing liquid leakage.

[0069] The implementation principle of the ammonia-containing tail gas treatment system in this application embodiment is as follows: When ammonia needs to be absorbed, the ammonia-containing tail gas is transported to the spraying device 3 using the circulation device 2. The spraying device 3 then sprays liquid into the tower body 1. The liquid absorbs the ammonia in the ammonia-containing tail gas. The circulation device 2 then recovers the liquid for reuse. When salt particles need to be cleaned, the salt on the receiving plate 4 is cleaned by the cleaning device, which can replace the manual cleaning method and improve the cleaning efficiency.

[0070] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An ammonia-containing tail gas treatment system, characterized by: The application relates to a tower body (1) for treating ammonia-containing tail gas, wherein an air inlet pipe (10) for feeding the ammonia-containing tail gas is arranged on the tower body (1), and an exhaust port (11) is arranged on the top wall of the tower body (1); The application further relates to a circulating device (2) for feeding liquid for absorbing the ammonia-containing tail gas into the tower body (1) and recycling, wherein a spraying device (3) for receiving the liquid fed by the circulating device (2) and spraying the ammonia-containing tail gas is arranged in the tower body (1), a receiving plate (4) for receiving the liquid is arranged in the tower body (1), and a cleaning device (5) for cleaning the salt on the receiving plate (4) is arranged on the tower body (1); The circulating device (2) comprises a liquid storage tank (20), a conveying pump (21) and a circulating pump (22), a liquid inlet pipe (23) is arranged between the liquid outlet of the liquid storage tank (20) and the liquid inlet of the conveying pump (21), a liquid outlet pipe (24) is arranged on the liquid outlet of the conveying pump (21), and the liquid outlet pipe (24) is connected with the spraying device (3); A conveying pipe (25) is arranged between the liquid inlet of the liquid storage tank (20) and the liquid outlet of the circulating pump (22), a discharge pipe (26) is arranged on the liquid inlet of the circulating pump (22), one end of the discharge pipe (26) far from the circulating pump (22) is inserted into the tower body (1), the end of the discharge pipe (26) inserted into the tower body (1) is arranged on the side close to the receiving plate (4), a guide inclined surface (40) is arranged on the receiving plate (4), and the distance between the guide inclined surface (40) and the bottom wall of the tower body (1) increases from the side close to the discharge pipe (26) to the side far from the discharge pipe (26); Sliding grooves (12) are arranged on the opposite two inner side walls of the tower body (1); The cleaning device (5) comprises a driving motor (50) arranged on the outer side wall of the tower body (1), a rotating screw (51) is coaxially arranged on the motor shaft of the driving motor (50), the rotating screw (51) is inserted into one of the sliding grooves (12) and is rotationally connected with the tower body (1), a sliding block (52) is threadedly connected with one end of the rotating screw (51) penetrating into the sliding groove (12), an exposed rod (53) is arranged in the other sliding groove (12), a sliding block (54) is slidably connected with the exposed rod (53), a scraper (55) is arranged between the sliding block (52) and the sliding block (54), a containing groove (13) for mounting the scraper (55) is arranged on the inner side wall of the tower body (1), and the containing groove (13) is arranged along the inclination direction of the guide inclined surface (40); A cavity (41) is arranged in the receiving plate (4), a plurality of through holes (42) are arranged on the top wall of the receiving plate (4) and communicate with the cavity (41), a power motor (43) is arranged in the cavity (41), a lifting screw (44) is arranged on the motor shaft of the power motor (43), a lifting block (45) is threadedly connected with the lifting screw (44), and a recess (47) is arranged on the side of the lifting block (45) close to the through hole (42). The mobile plate (48) is provided with a fixed block (49) penetrating through the through hole (42), the fixed block (49) is in contact with the side wall of the through hole (42), the two sides of the fixed block (49) are provided with extrusion inclined surfaces (400) for being pushed and extruded by the scraper (55), one side of the mobile plate (48) away from the fixed block (49) is provided with a mobile block (401), the mobile block (401) is inserted into the groove (47) and is in sliding connection with the groove (47), the mobile block (401) and the groove bottom wall of the groove (47) are provided with a supporting spring (402), the mobile block (401) is provided with a rotating hole (403) for inserting the lifting lead screw (44); One side of the scraper (55) away from the receiving plate (4) is provided with a connecting frame (56), the connecting frame (56) is provided with a brush plate (57), the brush plate (57) is provided with a plurality of bristles (58), the connecting frame (56) is provided with a shovel plate (59), and the scraper (55) is located between the brush plate (57) and the shovel plate (59); The receiving plate (4) is provided with a material falling groove (404) for salt falling, and the material falling groove (404) is located on the side of the receiving plate (4) away from the containing groove (13); The material falling groove (404) is rotatably provided with a material receiving box (405), the outer side wall of the tower body (1) is provided with a driving member (414) for driving the material receiving box (405) to rotate, the material receiving box (405) is provided with a containing cavity (407), the containing cavity (407) is provided with a through groove (408), the side wall of the tower body (1) is provided with a material discharging plate (409), and one side of the material receiving box (405) away from the driving member (414) is rotatably connected with the material discharging plate (409); When the driving member (414) drives the material receiving box (405) to rotate to the through groove (408) facing the material falling groove (404), the through groove (408) and the material falling groove (404) are in communication; when the driving member (414) drives the material receiving box (405) to rotate to the through groove (408) being staggered with the material falling groove (404), the material receiving box (405) rotates out of the material falling groove (404) and blocks the material falling groove (404).

2. The ammonia-containing tail gas treatment system of claim 1, wherein: The material receiving box (405) extends out of the tower body (1), the tower body (1) is provided with a blower (410), the air outlet of the blower (410) is provided with an air outlet pipe (411), the air outlet pipe (411) is rotatably connected with the material receiving box (405) away from the blower (410), and the groove wall of the material falling groove (404) is provided with a ventilation hole (415) in communication with the air outlet pipe (411); The driving member (414) comprises a rotating motor (406) arranged on the tower body, the rotating motor (406) is coaxially provided with a rotating rod (416), the rotating rod (416) is provided with a driving cone wheel (417) at one end of the air outlet pipe (411), the receiving box (405) is coaxially provided with a driven shaft (418) at one end close to the air outlet pipe (411), the driven shaft (418) is provided with a driven cone wheel (419) engaged with the driving cone wheel (417).

3. The ammonia-containing tail gas treatment system of claim 1, wherein: The spraying device (3) comprises at least two branch pipes (30) connected with the liquid outlet pipe (24), one end of the branch pipe (30) away from the liquid outlet pipe (24) extends into the tower body (1), and the branch pipe (30) is provided with a plurality of spray heads (31) at the end extending into the tower body (1), and the spray heads (31) are arranged on the side facing the air inlet pipe (10).

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