Ammonia desulfurization and oxidation treatment equipment and process

Abstract

The application discloses a kind of ammonia desulfurization processing equipment and process of synergic oxidation, including tower cauldron, tower cauldron is sequentially provided with exhaust pipe, spray layer, air supplement layer, waste gas inlet, pulse aeration mechanism, liquid discharge pipe from top to bottom, pulse aeration mechanism includes outer cylinder, inner cylinder, main gas pipe, motor, inner cylinder is arranged in outer cylinder, inner cylinder is tubular structure, main gas pipe is connected with the inside of inner cylinder, the inner circumferential surface of outer cylinder and the outer circumferential surface of inner cylinder are tightly sealed and arranged, first vent hole is provided on outer cylinder, first vent hole is provided on inner cylinder, and first vent hole is matched with first vent hole, motor is used to drive inner cylinder relative to outer cylinder rotation.The application is oxidized by air in desulfurization reaction, reduces the concentration of ammonium sulfite, improves desulfurization efficiency, and uses pulse aeration oxidation to replace existing continuous aeration, further improves oxidation effect, saves energy, and reduces enterprise waste gas desulfurization cost.

Description

Technical Field

[0001] This invention relates to the field of waste gas desulfurization technology, and in particular to an ammonia-based desulfurization and synergistic oxidation treatment equipment and process. Background Technology

[0002] Sulfur dioxide is one of the major air pollutants. Exhaust gases from coal-fired power plants and coking plants contain large amounts of sulfur dioxide, a major contributor to acid rain pollution. Therefore, sulfur dioxide must be desulfurized before it can be released. Common desulfurization methods include limestone desulfurization and ammonia desulfurization. Both methods involve first reacting the desulfurization liquid with sulfur dioxide to generate sulfite, and then introducing an oxidant to oxidize the sulfite ions to sulfate ions. The effectiveness of aeration and oxidation determines the quality of the desulfurization gypsum and ammonium sulfate, and consequently, the desulfurization effect.

[0003] Patent 201910877286.4 discloses an ammonia-based desulfurization oxidation device and method, which divides the desulfurization tower into an ammonia distribution zone, an absorption zone, and an oxidation zone. It uses a specially designed fluid stirrer and a multi-layer gas-liquid distribution plate to optimize gas-liquid and liquid-liquid mass transfer and improve the utilization rate of oxidation air. However, this technical solution still uses continuous aeration for oxidation. During the rising process, the bubbles may merge, resulting in a large proportion of ineffective oxygen supply, a large amount of energy wasted, and increased costs. At the same time, because the spray liquid is recycled, the unoxidized ammonium sulfite at the bottom of the tower will be recycled and sprayed again. Combined with the newly generated ammonium sulfite, this will lead to an excessively high concentration of ammonium sulfite, which will hinder the further reaction and absorption of ammonia water and sulfur dioxide, reducing the desulfurization effect.

[0004] How to improve the oxidation effect and save energy in the process of desulfurization of waste gas is a key issue that needs to be addressed in the development of gas-liquid desulfurization technology. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an ammonia-based desulfurization synergistic oxidation treatment device and process to solve the problems of low continuous aeration oxidation efficiency and poor desulfurization effect of desulfurization liquid in the prior art.

[0006] One objective of this invention is to provide an ammonia-based desulfurization and co-oxidation treatment device, comprising a tower reactor. From top to bottom, the tower reactor is provided with an exhaust pipe, a spray layer, a make-up air layer, a waste gas inlet, a pulse aeration mechanism, and a drain pipe. The pulse aeration mechanism includes an outer cylinder, an inner cylinder, a main air pipe, and a motor. The inner cylinder passes through the outer cylinder and has a tubular structure. The main air pipe connects to the interior of the inner cylinder. The inner circumferential surface of the outer cylinder is tightly sealed to the outer circumferential surface of the inner cylinder. The outer cylinder has a first external vent hole, and the inner cylinder has a first internal vent hole matching the first external vent hole. The motor drives the inner cylinder to rotate relative to the outer cylinder.

[0007] Preferably, the inner cylinder further includes a rotating shaft, a connecting rod, a piston, a slider, a first air pipe, and a second air pipe. The rotating shaft and the piston are both located within the inner cylinder. The rotating shaft coincides with the axis of the inner cylinder and is fixedly connected to the bottom of the inner cylinder. A spiral groove with its ends connected is provided on the circumferential surface of the rotating shaft, and a matching slider is provided within the groove. One end of the connecting rod is fixedly connected to the piston, and the other end is fixedly connected to the slider. The main air pipe connects the first air pipe and the second air pipe respectively. The first air pipe passes sequentially through the outer cylinder and the piston. The first air pipe is sealed to the outer cylinder. The pistons are slidably connected. The outlet end of the first air pipe is provided with a first one-way valve. The second air pipe passes through the outer cylinder and extends above the piston. The second air pipe is sealed to the piston. The outlet end of the second air pipe is provided with a second one-way valve. The outer cylinder is provided with a second external vent hole. The inner cylinder is provided with a second internal vent hole that matches the second external vent hole. The first external vent hole and the first internal vent hole are located above the piston. The second external vent hole and the second internal vent hole are located below the piston. The first internal vent hole and the second internal vent hole are located on opposite sides of the inner cylinder.

[0008] Preferably, the outer cylinder is provided with a hemispherical shell, which is fastened above the first vent and the second vent, with a gap between them, and the hemispherical shell is fixedly connected to the outer cylinder.

[0009] Preferably, the piston is provided with a push rod, the push rod passes through the outer cylinder and is slidably sealed to the outer cylinder, one end of the push rod is fixedly connected to the piston, and the other end of the push rod is fixedly connected to a fixing frame, the fixing frame is provided with a cleaning needle, and a spray head is provided in the spray layer, the cleaning needle can be reciprocated to insert and pull out the spray head.

[0010] Preferably, there are multiple pulse aeration mechanisms, and a transmission mechanism is provided between the pulse aeration mechanism and the motor.

[0011] Preferably, a filter cylinder is provided outside the tower, a high-pressure air inlet pipe is provided at one end of the filter cylinder, an exhaust port is provided at the other end of the filter cylinder, a filter bag is provided inside the filter cylinder, the filter bag is located between the high-pressure air inlet pipe and the exhaust port, and the exhaust port is connected to the main air pipe and the supplementary air layer.

[0012] Preferably, a fixing ring is provided in the middle of the filter bag, and a first air passage and a second air passage are provided on the filter cylinder. One end of the first air passage is connected to the first vent hole, and the other end of the first air passage is fixedly connected to the filter cylinder. One end of the second air passage is connected to the second vent hole, and the other end of the second air passage is fixedly connected to the filter cylinder. The first air passage and the second air passage are located on opposite sides of the filter cylinder. A first push block and a first push rod are provided in the first air passage. The first push rod and the second push rod pass through the filter cylinder and are slidably sealed to each other. One end of the first push rod is fixedly connected to the first push block, and the other end of the first push rod is fixedly connected to the fixing ring. One end of the second push rod is fixedly connected to the second push block, and the other end of the second push rod is fixedly connected to the fixing ring. Multiple exhaust holes are provided at the ends of both the first air passage and the second air passage. A portion of the exhaust holes are located between the first push block and the filter cylinder, and a portion of the exhaust holes are located between the second push block and the filter cylinder.

[0013] Preferably, the transmission mechanism includes a first transmission rod, a second transmission rod, and a third transmission rod, wherein the first transmission rod and the second transmission rod are connected by gear meshing, the second transmission rod and the third transmission rod are connected by gear meshing transmission, and the third transmission rod is connected by gear meshing.

[0014] The second objective of this invention is to provide a process for ammonia-based desulfurization and synergistic oxidation, comprising the following steps:

[0015] S1. Ammonia water is sprayed out from the spray layer and reacts in reverse with the sulfur-containing waste gas below to generate ammonium sulfite;

[0016] S2. During the gravity settling of ammonium sulfite, a large amount of oxygen-containing air is introduced through the air replenishment layer to partially oxidize the ammonium sulfite;

[0017] S3. The solution collected at the bottom of the tower is oxidized by pulse aeration through a pulse aeration mechanism so that all ammonium sulfite is converted into ammonium sulfate.

[0018] The present invention has the following advantages:

[0019] 1. By rotating the inner cylinder relative to the outer cylinder to achieve the pulse aeration effect of connecting and closing the first venting outer hole and the first venting inner hole, a continuous pulse oxidation function is realized in the desulfurization waste liquid. Compared with the continuous aeration oxidation method, it increases the oxygen content in the ammonium sulfite solution, accelerates the reaction efficiency of ammonium sulfite to ammonium sulfate oxidation, reduces the ineffective oxygen supply time, saves energy, and reduces the enterprise's waste gas desulfurization oxygen supply cost;

[0020] 2. By cooperating with the piston installed inside the inner cylinder, the pulse aeration mechanism can realize the functions of air intake, compression and exhaust. This not only increases the pulse aeration pressure but also the pulse aeration frequency, further improving the oxidation effect of the desulfurization waste liquid. At the same time, the up and down movement of the piston can also link the unblocking needle to move up and down, thus unblocking the nozzle and preventing clogging.

[0021] 3. The relative pulse airflow generated by the pulse aeration mechanism can be used to drive the first push block and the second push block to reciprocate, thereby achieving the left and right vibration function of the filter bag and avoiding the problem of poor air delivery caused by dust accumulation in the filter bag.

[0022] 4. A co-oxidation process for desulfurization using ammonia is disclosed. By introducing a large amount of oxygen-containing air during the reaction of sulfur-containing waste gas and ammonia water, the generated ammonium sulfite is partially oxidized, thereby reducing the concentration of ammonium sulfite, accelerating the forward desulfurization reaction, and further improving the desulfurization effect. Attached Figure Description

[0023] Figure 1 This is a cross-sectional structural diagram of an embodiment of the present invention;

[0024] Figure 2 This is a cross-sectional view of the pulse aeration mechanism according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the dust removal mechanism structure according to an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the internal structure of the transmission gear mechanism according to an embodiment of the present invention.

[0027] In the diagram, 1. Tower bottom; 2. Exhaust pipe; 3. Waste gas inlet; 4. Drain pipe; 5. Spray layer; 6. Air replenishment layer; 7. Pulse aeration mechanism; 8. Motor; 9. Outer cylinder; 10. Inner cylinder; 11. First vent external port; 12. First vent internal port; 13. Rotating shaft; 14. Piston; 15. Connecting rod; 16. Slide groove; 17. Sliding block; 18. First air pipe; 19. First one-way valve; 20. Second air pipe; 21. Second one-way valve; 22. Second vent external port; 23. Second vent internal port 24. Hemispherical shell; 25. Top rod; 26. Fixing bracket; 27. Unclogging needle; 28. Nozzle; 29. ​​Main air pipe; 30. Filter cartridge; 31. High-pressure air inlet pipe; 32. First air passage; 33. Second air passage; 34. Exhaust port; 35. First push block; 36. First push rod; 37. Second push block; 38. Second push rod; 39. Fixing ring; 40. Filter bag; 41. Exhaust port; 42. Transmission mechanism; 43. First transmission rod; 44. Second transmission rod; 45. Third transmission rod. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0030] like Figure 1 As shown, an ammonia-based desulfurization and co-oxidation treatment device includes a tower 1. The tower 1 is provided with an exhaust pipe 2, a spray layer 5, a make-up air layer 6, an exhaust gas inlet 3, a pulse aeration mechanism 7, and a drain pipe 4 from top to bottom. The exhaust pipe 2 is installed at the top of the tower 1. The spray layer 5 is a pipe structure composed of multiple branch pipes, on which multiple vertically downward-facing nozzles 28 are installed. The make-up air layer 6 is also a pipe structure composed of multiple branch pipes and is used to supplement oxygen-containing air into the tower 1. The exhaust gas inlet 3 is installed in the middle of the tower 1. The pulse aeration mechanism 7 is installed in the solution at the bottom of the tower 1. The drain pipe 4 is installed at the bottom of the tower 1.

[0031] In some embodiments, the pulse aeration mechanism 7 includes an outer cylinder 9, an inner cylinder 10, a main air pipe 29, and a motor 8. The inner cylinder 10 is a bottom-sealed tubular structure, fitted inside the outer cylinder 9, with the bottom of the inner cylinder 10 passing through the bottom of the outer cylinder 9. The bottom of the inner cylinder 10 can be used to fix the output end of the motor 8. The outer cylinder 9 and the inner cylinder 10 form a closed internal cavity. The main air pipe 29 connects to the interior of the inner cylinder 10, that is, it connects to the internal cavity and supplies high-pressure air to it. The inner circumferential surface of the outer cylinder 9 and the outer circumferential surface of the inner cylinder 10 are tightly sealed. The outer cylinder 9 is provided with a first vent external hole 11, and the inner cylinder 10 is provided with a first vent internal hole 12 that matches the first vent external hole 11. The motor 8 is installed outside the vessel body 1. The motor 8 is used to drive the inner cylinder 10 to rotate relative to the outer cylinder 9, so that when the first vent external hole 11 and the first vent internal hole 12 are connected, gas is aerated outward, or when misaligned, gas emission is obstructed.

[0032] In some embodiments, such as Figure 2As shown, the pulse aeration mechanism 7 includes an outer cylinder 9, an inner cylinder 10, a main air pipe 29, a motor 8, a rotating shaft 13, a connecting rod 15, a piston 14, a slider 17, a first air pipe 18, and a second air pipe 20. The outer cylinder 9 is a hollow cylindrical structure, and the inner cylinder 10 is a tubular structure with an open top and a closed bottom. The inner cylinder 10 is fitted inside the outer cylinder 9, and the inner circumferential surface of the outer cylinder 9 is tightly sealed to the outer circumferential surface of the inner cylinder 10. The rotating shaft 13 and the piston 14 are both located inside the inner cylinder 10, with the piston 14 located above the rotating shaft 13. The axis of the rotating shaft 13 coincides with that of the inner cylinder 10 and is fixedly connected to the bottom of the inner cylinder 10. The rotating shaft 13 passes through the inner cylinder 10 and the outer cylinder 9 in sequence. A spiral groove 16 with the beginning and end connected is provided on the circumferential surface of the rotating shaft 13. The groove 16 is arranged around the rotating shaft 13 and extends spirally from the upper part of the rotating shaft 13 to the middle part, and then spirals upward again from the middle part to the starting point of the connection. The cross-section of the groove 16 is elliptical. A matching slider 17 is provided in the groove 16. One end of the connecting rod 15 is fixedly connected to the piston 14, and the other end of the connecting rod 15 is fixedly connected to the slider 17. After the rotating shaft 13 rotates, the piston 14 is driven to move up and down in the inner cylinder 10 through the slider 17 and the connecting rod 15.

[0033] The main air pipe 29 connects to the first air pipe 18 and the second air pipe 20. The first air pipe 18 passes through the outer cylinder 9 and the piston 14 in sequence. The first air pipe 18 and the outer cylinder 9 are sealed together, and the first air pipe 18 and the piston 14 are slidably connected. The first air pipe 18 is eccentrically positioned to limit the rotation of the piston 14. A first one-way valve 19 is installed at the outlet end of the first air pipe 18, allowing gas to flow from the outside into the inner cylinder 10 through the first air pipe 18. The second air pipe 20 passes through the outer cylinder 9 and extends above the piston 14. The second air pipe 20 and the piston 14 are sealed together. A second one-way valve 21 is installed at the outlet end of the second air pipe 20, allowing gas to flow from the outside into the inner cylinder 10 through the second air pipe 20. The piston 14 divides the interior of the inner cylinder 9 into upper and lower parts. During the up-and-down movement of the piston 14 within the inner cylinder 10, the gas passing through the first air pipe 18 will be diverted into the inner cylinder 10. One-way valve 19 and second one-way valve 21 draw in and compress air. A second vent hole 22 is opened on the outer cylinder 9, and a second vent hole 23 matching the second vent hole 22 is opened on the inner cylinder 10. The first vent hole 11 and the first vent hole 12 are located above the piston 14. When the first vent hole 11 and the first vent hole 12 are connected, the compressed air above the piston 14 is quickly discharged. The second vent hole 22 and the second vent hole 23 are located below the piston 14. When the second vent hole 22 and the second vent hole 23 are connected, the compressed air below the piston 14 is quickly discharged. The first vent hole 12 and the second vent hole 23 are located on opposite sides of the inner cylinder 10. The first vent hole 11 and the second vent hole 22 are located on the same side of the outer cylinder 9, so that when the piston 14 is venting, the piston 14 is drawing air from below.

[0034] Furthermore, a hemispherical shell 24 is installed on the outer cylinder 9. The hemispherical shell 24 is fastened above the first vent hole 11 and the second vent hole 22, with a gap between them to allow air to be ejected. The hemispherical shell 24 is fixedly connected to the outer cylinder 9 by two metal rods. The installation of the hemispherical shell 24 allows the pulsed gas to impact the first vent hole 11 and the second vent hole 22, preventing impurities from entering the gap between the outer cylinder 9 and the inner cylinder 10 and causing blockage.

[0035] like Figure 2 As shown, a push rod 25 is mounted on the piston 14. The push rod 25 passes through the outer cylinder 9 and is slidably sealed to the outer cylinder 9. One end of the push rod 25 is fixedly connected to the piston 14, as shown. Figure 1 As shown, a fixing bracket 26 is installed at the other end of the top rod 25 and is fixedly connected to the fixing bracket 26. A clearing needle 27 is vertically arranged on the fixing bracket 26. The diameter of the clearing needle 27 is smaller than the nozzle diameter of the nozzle 28. The piston 14 drives the top rod 25, the fixing bracket 26 and the clearing needle 27 to move up and down in sequence, and to repeatedly insert and pull out of the nozzle 28, so that the sprayed ammonia water flow rate is accelerated to impact the clumps and achieve the clearing effect.

[0036] like Figure 4 As shown, there are four pulse aeration mechanisms 7. A transmission mechanism 42 is provided between the pulse aeration mechanism 7 and the motor 8. The transmission mechanism 42 is a bevel gear meshing transmission structure. The motor 8 is installed outside the tower 1. The transmission mechanism 42 includes a first transmission rod 43, a second transmission rod 44, and a third transmission rod 45. The first transmission rod 43 and the second transmission rod 44 are connected by gear meshing. The second transmission rod 44 and the third transmission rod 45 are connected by gear meshing transmission. The third transmission rod 45 is connected by gear meshing transmission to the rotating shaft 14. The output end of the motor 8 is fixedly connected to the first transmission rod 43. The output end of the motor 8 directly drives the first transmission rod 43 to rotate. The rotation of the first transmission rod 43 drives the second transmission rod 44 to rotate through the first bevel gear meshing transmission. Two bevel gears are installed on the second transmission rod 44 for coaxial transmission. The second transmission rod 44 drives the third transmission rod 45 to rotate through the second bevel gear meshing transmission. The third transmission rod 45 drives the rotating shaft 13 to rotate through the third bevel gear meshing transmission.

[0037] like Figure 1 As shown, a filter cylinder 30 is installed outside the tower 1. A high-pressure air inlet pipe 31 is installed at one end of the filter cylinder 30, and two exhaust ports 41 are opened at the other end of the filter cylinder 30. A filter bag 40 is installed inside the filter cylinder 30. The filter bag 40 is used to intercept and filter impurities in the air to avoid blockage and failure of the first one-way valve 19 and the second one-way valve 21. The filter bag 40 is located between the high-pressure air inlet pipe 31 and the exhaust port 41. The exhaust port 41 is connected to the main air pipe 29 and the air replenishment layer 6 respectively.

[0038] Furthermore, such as Figure 3As shown, a fixing ring 39 is installed in the middle of the filter bag 40, and the fixing ring 39 is glued and fixedly connected to the filter bag 40. A first air passage 32 and a second air passage 33 are installed on the filter cylinder 30. The air inlet end of the first air passage 32 is connected to the first vent hole 11, and the air outlet end of the first air passage 32 is fixedly connected to the filter cylinder 30. The air inlet end of the second air passage 33 is connected to the second vent hole 22, and the air outlet end of the second air passage 33 is fixedly connected to the filter cylinder 30. Both the first air passage 32 and the second air passage 33 are tubular structures. The air outlet ends of the first air passage 32 and the second air passage 33 are sealed. The air outlet ends of the first air passage 32 and the second air passage 33 are located on opposite sides of the filter cylinder 30. A first push block 35 and a first push rod 36 are installed inside the first air passage 32. The first push rod 36 and the second push rod 38 pass through the filter cylinder 30 and are slidably and sealingly connected to it. One end of the first push rod 36 is fixedly connected to the first push block 35. The other end of the first push rod 36 is fixedly connected to the fixing ring 39. One end of the second push rod 38 is fixedly connected to the second push block 37, and the other end of the second push rod 38 is fixedly connected to the fixing ring 39. The first push block 35 and the second push block 37 are both cylindrical structures with a diameter smaller than that of the first air passage 32 and the second air passage 33. The first push block 35 and the second push block 37 are both made of lightweight materials such as plastic. The ends of the first air passage 32 and the second air passage 33 are opened with exhaust holes 34. The exhaust holes 34 are located between the first push block 35 and the filter cylinder 30, and between the second push block 37 and the filter cylinder 30, respectively. The gas between the first air passage 32 and the second air passage 33 is discharged from the exhaust holes 34. The pulse gas sprayed intermittently from the pulse aeration mechanism 7 will push the first push block 35 and the second push block 37 to move, thereby shaking the filter bag 40 left and right, so that the dust on the filter bag 40 falls quickly to the bottom, avoiding blockage and obstruction of gas flow.

[0039] A process for ammonia-based desulfurization and synergistic oxidation includes the following steps:

[0040] S1. Ammonia water is sprayed out from the spray layer 5 and reacts with the sulfur-containing waste gas below to generate ammonium sulfite;

[0041] S2. During the gravity settling of ammonium sulfite, a large amount of oxygen-containing air is introduced through the air replenishment layer 6 to partially oxidize the ammonium sulfite into ammonium sulfate, thereby reducing the concentration of ammonium sulfite generated during the desulfurization process, accelerating the forward reaction, and improving the desulfurization effect.

[0042] S3. The solution collected at the bottom of the tower 1 is oxidized by pulse aeration through pulse aeration mechanism 7, so that ammonium sulfite is completely converted into ammonium sulfate. The high-pressure instantaneous airflow of pulse aeration generates a violent vortex, which makes the bubbles break into smaller ones and the oxidation effect is better.

[0043] Working principle: Motor 7 drives shaft 13 to rotate via transmission mechanism 42. The rotation of shaft 13 drives piston 14 to reciprocate up and down. Simultaneously, inner cylinder 10 also rotates. When piston 14 moves upward, the air above piston 14 is compressed, and the air below piston 14 expands, reducing pressure. Air filtered by filter cylinder 30 enters inner cylinder 10 through first air pipe 18 and first one-way valve 19. When inner cylinder 10 rotates to the point where first vent external hole 11 connects with first vent internal hole 12, the compressed air is quickly discharged into the solution. As shaft 13 continues to rotate, inner cylinder 10 blocks first vent external hole 11, piston 14 moves downward, and air above piston 14 expands, reducing pressure. Filtered air passes through second air pipe 20 and first one-way valve 30. Two one-way valves 21 enter the inner cylinder 10, and the air below the piston 14 is compressed. When the second vent external hole 22 and the second vent internal hole 23 are connected, the compressed air is quickly discharged into the solution. The piston 14 moves up and down to make the pulse aeration mechanism 7 alternately draw in, compress, and exhaust air to realize the pulse aeration function. Simultaneously, the up and down movement of the piston 14 drives the push rod 25, the fixing bracket 26, and the unblocking needle 27 to move up and down, so that the unblocking needle 27 is repeatedly inserted and pulled out of the nozzle 28 to realize the unblocking function of the nozzle 28. The high-pressure airflow generated by the pulse aeration alternately pushes the first push block 35 and the second push block 37 to move back and forth through the first air passage 32 and the second air passage 33, thereby shaking the filter bag 40 to move, avoiding the problem of dust accumulation and blockage of the filter bag 40 and poor air intake.

[0044] The piston 14 is driven up and down by the motor 8, which not only generates pulse aeration function, but also enables the unblocking needle 27 to unblock the nozzle 28. The synchronous linkage also achieves the effect of shaking the filter bag 40 to avoid dust accumulation and clogging.

[0045] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An ammonia desulfurization and oxidation treatment apparatus characterized by comprising: The utility model provides a tower reactor, including tower kettle (1), tower kettle (1) are sequentially provided with exhaust pipe (2), spray layer (5), air supplement layer (6), waste gas import (3), pulse aeration mechanism (7) from top to bottom, pulse aeration mechanism (7) includes outer tube (9), inner tube (10), main gas pipe (29), motor (8), inner tube (10) is arranged in outer tube (9), inner tube (10) is tubular structure, main gas pipe (29) is communicated the inside of inner tube (10), the inner circumferential surface of outer tube (9) is tightly sealed with the outer circumferential surface of inner tube (10) arrangement, be provided with first venting outer hole (11) on outer tube (9), be provided with first venting inner hole (12) with first venting outer hole (11) matching on inner tube (10), motor (8) is used for driving inner tube (10) relative rotation of outer tube (9), still be provided with pivot (13), connecting rod (15), piston (14), sliding block (17), first gas pipe (18), second gas pipe (20) in inner tube (10), pivot (13) and piston (14) are all located in inner tube (10), pivot (13) coincides with the axis of inner tube (10), and fixedly connected inner tube (10) bottom, be provided with head-to-tail spiral chute (16) on the circumferential surface of pivot (13), be provided with sliding block (17) with its matching in chute (16), one end fixedly connected piston (14) of connecting rod (15), the other end fixedly connected sliding block (17) of connecting rod (15), main gas pipe (29) is communicated first gas pipe (18) with second gas pipe (20) respectively, first gas pipe (18) sequentially passes through outer tube (9), piston (14), first gas pipe (18) is sealedly connected between first gas pipe (18) and outer tube (9), first gas pipe (18) and piston (14) are slidably connected, the outlet end of first gas pipe (18) is provided with first check valve (19), second gas pipe (20) passes through outer tube (9), and extends to the above of piston (14), second gas pipe (20) and piston (14) are sealedly connected, the outlet end of second gas pipe (20) is provided with second check valve (21), be provided with second venting outer hole (22) on outer tube (9), be provided with second venting inner hole (23) with second venting outer hole (22) matching on inner tube (10), first venting outer hole (11) and first venting inner hole (12) are located the above of piston (14), second venting outer hole (22) and second venting inner hole (23) are located the below of piston (14), first venting inner hole (12) and second venting inner hole (23) are located the opposite side of inner tube (10) respectively.

2. The device for treating ammonia desulfurization and oxidation according to claim 1, characterized in that: The outer cylinder (9) is provided with a hemispherical shell (24), which is buckled above the first venting outer hole (11) and the second venting outer hole (22) and has a gap between them, and the hemispherical shell (24) is fixedly connected with the outer cylinder (9).

3. An ammonia-based desulfurization and oxidation treatment device according to any one of claims 1 or 2, characterized in that: The piston (14) is provided with a top rod (25), which penetrates the outer cylinder (9) and is in sliding sealing connection with the outer cylinder (9), one end of the top rod (25) is fixedly connected with the piston (14), and the other end of the top rod (25) is fixedly connected with a fixing frame (26), the fixing frame (26) is provided with a dredging needle (27), the spray layer (5) is provided with a spray head (28), and the dredging needle (27) can reciprocally insert and pull out the spray head (28).

4. The device for treating ammonia desulfurization and oxidation according to claim 3, characterized in that: The pulse aeration mechanism (7) is provided with a transmission mechanism (42) between the pulse aeration mechanism (7) and the motor (8).

5. The apparatus for treating ammonia desulfurization and oxidation according to claim 4, characterized in that: The tower kettle (1) is provided with a filter cylinder (30) outside, one end of the filter cylinder (30) is provided with a high-pressure air inlet pipe (31), the other end of the filter cylinder (30) is provided with an air outlet (41), the filter cylinder (30) is provided with a filter bag (40) inside, the filter bag (40) is located between the high-pressure air inlet pipe (31) and the air outlet (41), and the air outlet (41) communicates the main air pipe (29) with the air supplementing layer (6).

6. The device for treating ammonia desulfurization and oxidation according to claim 5, characterized in that: The middle part of the filter bag (40) is provided with a fixing ring (39), the filter cylinder (30) is provided with a first air channel (32) and a second air channel (33), one end of the first air channel (32) communicates with the first venting outer hole (11), the other end of the first air channel (32) is fixedly connected with the filter cylinder (30), one end of the second air channel (33) communicates with the second venting outer hole (22), the other end of the second air channel (33) is fixedly connected with the filter cylinder (30), the first air channel (32) and the second air channel (33) are located on opposite sides of the filter cylinder (30) respectively, the first air channel (32) is provided with a first push block (35) and a first push rod (36), the first push rod (36) and the second push rod (38) penetrate the filter cylinder (30) respectively and are in sliding sealing connection with the filter cylinder (30), one end of the first push rod (36) is fixedly connected with the first push block (35), the other end of the first push rod (36) is fixedly connected with the fixing ring (39), one end of the second push rod (38) is fixedly connected with a second push block (37), the other end of the second push rod (38) is fixedly connected with the fixing ring (39), and the ends of the first air channel (32) and the second air channel (33) are provided with a plurality of air exhaust holes (34), part of the air exhaust holes (34) are located between the first push block (35) and the filter cylinder (30), and part of the air exhaust holes (34) are located between the second push block (37) and the filter cylinder (30).

7. The device for treating ammonia desulfurization and oxidation according to claim 4, characterized in that: The transmission mechanism (42) comprises a first transmission rod (43), a second transmission rod (44) and a third transmission rod (45), the first transmission rod (43) and the second transmission rod (44) are connected in gear engagement, the second transmission rod (44) and the third transmission rod (45) are connected in gear engagement transmission, and the third transmission rod (45) and the rotating shaft (13) are connected in gear engagement.

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