Ammonia desulfurization synergistic oxidation treatment equipment and process

Abstract

The invention discloses ammonia desulfurization synergistic oxidation treatment equipment and process, the ammonia desulfurization synergistic oxidation treatment equipment comprises a tower kettle, the tower kettle is sequentially provided with an exhaust pipe, a spraying layer, a gas supplementing layer, a waste gas inlet, a pulse aeration mechanism and a liquid discharge pipe from top to bottom, the pulse aeration mechanism comprises an outer cylinder, an inner cylinder, a main gas pipe and a motor, the inner cylinder is arranged in the outer cylinder in a penetrating manner, and the inner cylinder is of a tubular structure; the main air pipe is communicated with the interior of the inner cylinder, the inner circumferential surface of the outer cylinder is tightly attached to the outer circumferential surface of the inner cylinder in a sealed mode, a first ventilation outer hole is formed in the outer cylinder, a first ventilation inner hole matched with the first ventilation outer hole is formed in the inner cylinder, and the motor is used for driving the inner cylinder to rotate relative to the outer cylinder. Air is introduced in the desulfurization reaction for partial oxidation, the concentration of ammonium sulfite is reduced, the desulfurization efficiency is improved, existing continuous aeration is replaced with pulse aeration oxidation subsequently, the oxidation effect is further improved, energy is saved, and the waste gas desulfurization cost of enterprises is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas desulfurization, and in particular to ammonia desulfurization coordinated oxidation treatment equipment and process. Background Art

[0002] Sulfur dioxide is one of the main air pollutants. The waste gas emitted by coal-fired power plants and coking plants contains a large amount of sulfur dioxide, which is the main factor in the formation of acid rain pollution. It must be discharged after desulfurization. Common desulfurization methods include limestone desulfurization and ammonia desulfurization. Both methods first react the desulfurization liquid with sulfur dioxide to generate sulfite, and then introduce an oxidant to oxidize the sulfite to sulfate. The effect of aeration oxidation determines the quality of desulfurized gypsum and ammonium sulfate, and also determines the desulfurization effect.

[0003] Patent 201910877286.4 discloses an ammonia desulfurization oxidation device and method, which divides the desulfurization tower into an ammonia distribution zone, an absorption zone, and an oxidation zone, and cooperates with a specially designed fluid agitator 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, and the bubbles will merge during the rising process. The ineffective oxygen supply accounts for a large proportion, a large amount of energy is wasted, and the cost is pushed up. At the same time, due to the recycling of the spray liquid, the unoxidized ammonium sulfite at the bottom of the tower will be recycled and sprayed again. The newly generated ammonium sulfite will result in 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 during the waste gas desulfurization process is a key issue that needs to be urgently solved in the development of gas-liquid desulfurization technology. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an ammonia desulfurization coordinated 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 of the objects of the present invention is to provide an ammonia desulfurization coordinated oxidation treatment device, including a tower kettle, wherein the tower kettle is provided with an exhaust pipe, a spray layer, an air supply layer, a waste gas inlet, a pulse aeration mechanism, and a drain pipe in sequence from top to bottom, and the pulse aeration mechanism includes an outer cylinder, an inner cylinder, a main air pipe, and a motor. The inner cylinder is inserted into the outer cylinder, and the inner cylinder is a tubular structure. The main air pipe is connected to the interior of the inner cylinder. The inner circumferential surface of the outer cylinder is tightly sealed with the outer circumferential surface of the inner cylinder. The outer cylinder is provided with a first ventilation outer hole, and the inner cylinder is provided with a first ventilation inner hole matching the first ventilation outer hole. The motor is used to drive the inner cylinder to rotate relative to the outer cylinder.

[0007] Preferably, a rotating shaft, a connecting rod, a piston, a slider, a first air pipe and a second air pipe are further arranged in the inner cylinder. The rotating shaft and the piston are both located in 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 chute that is connected end to end is arranged on the circumferential surface of the rotating shaft. A slider that matches the chute is arranged in the chute. One end of the connecting rod is fixedly connected to the piston, and the other end of the connecting rod is fixedly connected to the slider. The main air pipe is respectively communicated with the first air pipe and the second air pipe. The first air pipe sequentially passes through the outer cylinder and the piston. A sealed connection is arranged between the first air pipe and the outer cylinder. A sliding connection is arranged between the first air pipe and the piston. A first one-way valve is arranged at the air outlet end of the first air pipe. The second air pipe passes through the outer cylinder and extends above the piston. A sealed connection is arranged between the second air pipe and the piston. A second one-way valve is arranged at the air outlet end of the second air pipe. A second ventilation outer hole is arranged on the outer cylinder. A second ventilation inner hole that matches the second ventilation outer hole is arranged on the inner cylinder. The first ventilation outer hole and the first ventilation inner hole are located above the piston. The second ventilation outer hole and the second ventilation inner hole are located below the piston. The first ventilation inner hole and the second ventilation inner hole are respectively located on the opposite sides of the inner cylinder.

[0008] Preferably, a hemispherical shell is arranged on the outer cylinder. The hemispherical shell is buckled above the first ventilation outer hole and the second ventilation outer hole, and a gap is left between them. The hemispherical shell is fixedly connected to the outer cylinder.

[0009] Preferably, a push rod is arranged on the piston. The push rod passes through the outer cylinder and is in sliding and sealing connection with 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. A dredging needle is arranged on the fixing frame. Sprayers are arranged in the spraying layer. The dredging needle can be reciprocally inserted into and pulled out of the sprayers.

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

[0011] Preferably, a filter cylinder is arranged outside the tower kettle. One end of the filter cylinder is provided with a high-pressure air inlet pipe, and the other end of the filter cylinder is provided with an exhaust port. A filter bag is arranged in the filter cylinder. The filter bag is located between the high-pressure air inlet pipe and the exhaust port. The exhaust port is communicated with the main air pipe and the air supplement 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 communicates with the first ventilation outer hole, and the other end of the first air passage is fixedly connected to the filter cylinder. One end of the second air passage communicates with the second ventilation outer 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 respectively 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 respectively pass through the filter cylinder and are slidably and sealingly connected thereto. 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. A plurality of exhaust holes are provided at the ends of the first air passage and the second air passage. Part of the exhaust holes are located between the first push block and the filter cylinder, and part 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. 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 and the rotating shaft are connected by gear meshing.

[0014] The second object of the present invention is to provide an ammonia desulfurization and co-oxidation treatment process, including the following steps:

[0015] S1. Spray ammonia water from the spray layer and carry out a reverse contact reaction with the sulfur-containing waste gas below to generate ammonium sulfite.

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

[0017] S3. Pulse aeration oxidation is carried out on the solution collected at the bottom of the tower kettle through a pulse aeration mechanism to convert all ammonium sulfite 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 the communication and closing of the first ventilation outer hole and the first ventilation inner hole, the continuous pulse oxidation function in the desulfurization waste liquid is realized. Compared with the continuous aeration oxidation method, the oxygen content in the ammonium sulfite solution is increased, the reaction efficiency of ammonium sulfite oxidation to ammonium sulfate is accelerated, the ineffective oxygen supply time is reduced, energy is saved, and the oxygen supply cost for enterprise waste gas desulfurization is reduced;

[0020] 2. By means of the cooperation between the rotating shaft installed inside the inner cylinder and the piston, the functions of air suction, compression and exhaust of the pulse aeration mechanism are realized, which not only improves the pulse aeration pressure, but also increases the pulse aeration frequency, further enhancing the oxidation effect of the desulfurized waste liquid. At the same time, the up-and-down movement of the piston can also drive the up-and-down reciprocating movement of the dredging needle, achieving the function of dredging the nozzle to prevent blockage.

[0021] 3. The relative pulse air flow generated by the pulse aeration mechanism can be used to drive the first push block and the second push block to reciprocate, realizing the function of vibrating the filter bag left and right, and avoiding the problem of poor gas transmission caused by dust accumulation on the filter bag.

[0022] 4. A disclosed ammonia desulfurization and co-oxidation treatment process partially oxidizes the generated ammonium sulfite by introducing a large amount of oxygen-containing air during the reaction between the sulfur-containing waste gas and ammonia water, reducing the concentration of ammonium sulfite, accelerating the forward progress of the desulfurization reaction, and further improving the desulfurization effect. Brief Description of the Drawings

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

[0024] Figure 2 is a schematic cross-sectional structure diagram of the pulse aeration mechanism of an embodiment of the present invention;

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

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

[0027] In the figure, 1, tower kettle; 2, exhaust pipe; 3, waste gas inlet; 4, drain pipe; 5, spray layer; 6, air supplement layer; 7, pulse aeration mechanism; 8, motor; 9, outer cylinder; 10, inner cylinder; 11, first ventilation outer hole; 12, first ventilation inner hole; 13, rotating shaft; 14, piston; 15, connecting rod; 16, chute; 17, slider; 18, first air pipe; 19, first one-way valve; 20, second air pipe; 21, second one-way valve; 22, second ventilation outer hole; 23, second ventilation inner hole; 24, hemispherical shell; 25, ejector rod; 26, fixing frame; 27, dredging needle; 28, nozzle; 29, main air pipe; 30, filter cartridge; 31, high-pressure inlet air pipe; 32, first air duct; 33, second air duct; 34, exhaust hole; 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 Embodiments

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Components of the embodiments of the present invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0030] As Figure 1 shown, an ammonia-based desulfurization and co-oxidation treatment device includes a tower kettle 1. The tower kettle 1 is sequentially provided with an exhaust pipe 2, a spray layer 5, an air supplement 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 kettle 1. The spray layer 5 is a pipe structure composed of multiple branch pipelines, and a plurality of vertically downward nozzles 28 are installed thereon. The air supplement layer 6 is also a pipe structure composed of multiple branch pipelines. The air supplement layer 6 is used to supplement oxygen-containing air into the tower kettle. The exhaust gas inlet 3 is installed in the middle of the tower kettle 1. The pulse aeration mechanism 7 is installed in the solution at the bottom of the tower kettle 1. The drain pipe 4 is installed at the bottom of the tower kettle 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 tube structure with a sealed bottom. The inner cylinder 10 is sleeved inside the outer cylinder 9, and the bottom of the inner cylinder 10 passes through the bottom of the outer cylinder 9. The bottom of the inner cylinder 10 can be used to fixedly connect to 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 communicates with the inside of the inner cylinder 10, that is, communicates with this internal cavity and conveys high-pressure air to it. The inner circumferential surface of the outer cylinder 9 is tightly and sealingly arranged against the outer circumferential surface of the inner cylinder 10. The outer cylinder 9 is provided with a first ventilation outer hole 11, and the inner cylinder 10 is provided with a first ventilation inner hole 12 matching the first ventilation outer hole 11. The motor 8 is installed outside the kettle 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 ventilation outer hole 11 and the first ventilation inner hole 12 are communicated, air is aerated outward, or when they are misaligned, gas discharge is blocked.

[0032] In some embodiments, as Figure 2As shown in the figure, 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 sleeved inside the outer cylinder 9, and the inner circumferential surface of the outer cylinder 9 is tightly sealed against 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. The piston 14 is located above the rotating shaft 13. The rotating shaft 13 coincides with the axis 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 chute 16 that connects end to end is provided on the circumferential surface of the rotating shaft 13. The chute 16 is arranged around the rotating shaft 13 in a circle, spirally extends from the upper part of the rotating shaft 13 to the middle part, and then spirally extends upward again from the middle part to connect to the starting position. The cross-section of the chute 16 is elliptical. A slider 17 that matches the chute 16 is arranged inside the chute 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 by the slider 17 and the connecting rod 15 to reciprocate up and down inside the inner cylinder 10.

[0033] The main air pipe 29 is respectively connected 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 is hermetically connected to the outer cylinder 9 and is slidably connected to the piston 14. The first air pipe 18 is eccentrically arranged to limit the rotation of the piston 14. A first one-way valve 19 is installed at the air outlet end of the first air pipe 18. The first one-way valve 19 allows gas to flow from the outside through the first air pipe 18 into the inner cylinder 10. The second air pipe 20 passes through the outer cylinder 9 and extends above the piston 14. The second air pipe 20 is hermetically connected to the piston 14. A second one-way valve 21 is installed at the air outlet end of the second air pipe 20. The second one-way valve 21 allows gas to flow from the outside through the second air pipe 20 into the inner cylinder 10. The piston 14 divides the inside of the inner cylinder 9 into upper and lower parts. During the up and down movement of the piston 14 inside the inner cylinder 10, air is drawn in and compressed through the first one-way valve 19 and the second one-way valve 21. A second ventilation outer hole 22 is opened on the outer cylinder 9, and a second ventilation inner hole 23 that matches the second ventilation outer hole 22 is opened on the inner cylinder 10. The first ventilation outer hole 11 and the first ventilation inner hole 12 are located above the piston 14. When the first ventilation outer hole 11 and the first ventilation inner hole 12 are connected, the compressed air above the piston 14 is quickly discharged. The second ventilation outer hole 22 and the second ventilation inner hole 23 are located below the piston 14. When the second ventilation outer hole 22 and the second ventilation inner hole 23 are connected, the compressed air below the piston 14 is quickly discharged. The first ventilation inner hole 12 and the second ventilation inner hole 23 are respectively located on the opposite sides of the inner cylinder 10, and the first ventilation outer hole 11 and the second ventilation outer hole 22 are located on the same side of the outer cylinder 9, so that when the piston 14 performs an exhaust action above, the piston 14 performs an air intake action below.

[0034] Furthermore, a hemispherical shell 24 is installed on the outer cylinder 9. The hemispherical shell 24 is buckled above the first ventilation outer hole 11 and the second ventilation outer hole 22, and there is a gap allowing air to eject between them. The hemispherical shell 24 is fixedly connected to the outer cylinder 9 through two metal rods. The installation of the hemispherical shell 24 enables pulsed gas to impact the first ventilation outer hole 11 and the second ventilation outer hole 22, avoiding blockage caused by impurities entering the gap between the outer cylinder 9 and the inner cylinder 10.

[0035] As Figure 2 shown, a push rod 25 is installed on the piston 14. The push rod 25 passes through the outer cylinder 9 and is slidably and sealingly connected to the outer cylinder 9. One end of the push rod 25 is fixedly connected to the piston 14. As Figure 1 shown, a fixing frame 26 is installed at the other end of the push rod 25 and is fixedly connected to the fixing frame 26. A dredging needle 27 is vertically arranged on the fixing frame 26. The diameter of the dredging needle 27 is smaller than the nozzle diameter of the nozzle 28. The piston 14 drives the push rod 25, the fixing frame 26, and the dredging needle 27 to reciprocate up and down, and reciprocally insert into and pull out from the nozzle 28, so that the sprayed ammonia water flow rate is accelerated to impact the agglomeration to achieve a dredging effect.

[0036] As Figure 4 shown, there are 4 pulsed aeration mechanisms 7. A transmission mechanism 42 is arranged between the pulsed 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 kettle 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 is gear-meshingly connected to the second transmission rod 44. The second transmission rod 44 is gear-meshingly driven and connected to the third transmission rod 45. The third transmission rod 45 is gear-meshingly connected 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 coaxially driven and installed on the second transmission rod 44. 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] As Figure 1 shown, a filter cylinder 30 is installed outside the tower kettle 1. One end of the filter cylinder 30 is installed with a high-pressure inlet pipe 31. Two exhaust ports 41 are opened at the other end of the filter cylinder 30. A filter bag 40 is installed in the filter cylinder 30. The filter bag 40 is used to intercept and filter impurities in the air, avoiding 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 inlet pipe 31 and the exhaust ports 41. The exhaust ports 41 are respectively communicated with the main air pipe 29 and the air supplement layer 6.

[0038] Furthermore, as Figure 3As shown, a fixing ring 39 is installed in the middle of the filter bag 40. The fixing ring 39 is fixedly connected to the filter bag 40 by glue bonding. A first air duct 32 and a second air duct 33 are installed on the filter cylinder 30. The inlet end of the first air duct 32 communicates with the first ventilation outer hole 11, and the outlet end of the first air duct 32 is fixedly connected to the filter cylinder 30. The inlet end of the second air duct 33 communicates with the second ventilation outer hole 22, and the outlet end of the second air duct 33 is fixedly connected to the filter cylinder 30. Both the first air duct 32 and the second air duct 33 are of tubular structures. The outlet ends of the first air duct 32 and the second air duct 33 are sealed. The outlet ends of the first air duct 32 and the second air duct 33 are respectively located on the opposite sides of the filter cylinder 30. A first push block 35 and a first push rod 36 are installed in the first air duct 32. The first push rod 36 and the second push rod 38 respectively pass through the filter cylinder 30 and are both slidably and sealingly connected thereto. One end of the first push rod 36 is fixedly connected to the first push block 35, and 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. Both the first push block 35 and the second push block 37 are of cylindrical structures, and their diameters are smaller than the diameters of the first air duct 32 and the second air duct 33. Both the first push block 35 and the second push block 37 are made of lightweight materials such as plastic. Exhaust holes 34 are opened at the ends of the first air duct 32 and the second air duct 33. The exhaust holes 34 are respectively located between the first push block 35 and the filter cylinder 30, and between the second push block 37 and the filter cylinder 30. The gas between the first air duct 32 and the second air duct 33 is discharged from the exhaust holes 34. The pulsed gas intermittently ejected up and down by the pulsed aeration mechanism 7 will push the first push block 35 and the second push block 37 to move, realizing the left - right shaking of the filter bag 40, so that the dust accumulated on the filter bag 40 quickly falls downward, avoiding blockage and hindering gas flow.

[0039] An ammonia - based desulfurization and co - oxidation treatment process includes the following steps:

[0040] S1. Spraying ammonia water from the spraying layer 5 to make reverse contact reaction with the sulfur - containing waste gas below to generate ammonium sulfite.

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

[0042] S3. Pulse - aerating and oxidizing the solution collected at the bottom of the tower kettle 1 through the pulsed aeration mechanism 7 to convert all ammonium sulfite into ammonium sulfate. The high - pressure instantaneous air flow of the pulsed aeration generates violent vortices, making the bubbles break into finer ones, and the oxidation effect is better.

[0043] Working principle: the motor 7 drives the rotating shaft 13 to rotate through the transmission mechanism 42. The rotation of the rotating shaft 13 will drive the piston 14 to do up and down reciprocating motion, and the inner cylinder 10 will also rotate. When the piston 14 moves upward, the air above the piston 14 is compressed, and the air below the piston 14 expands to reduce the pressure. The air filtered by the filter cylinder 30 enters the inner cylinder 10 through the first air pipe 18 and the first one-way valve 19. When the inner cylinder 10 rotates until the first ventilation outer hole 11 is connected with the first ventilation inner hole 12, the compressed air is quickly discharged into the solution. When the rotating shaft 13 continues to rotate, the inner cylinder 10 blocks the first ventilation outer hole 11, and the piston 14 moves downward. The air above the piston 14 expands to reduce the pressure, and the filtered air passes through the second air pipe 20 and the first one-way valve 19. The second one-way valve 21 enters the inner tube 10, and the air below the piston 14 is compressed. When the second ventilation outer hole 22 is connected to the second ventilation inner hole 23, the compressed air is quickly discharged into the solution, and the piston 14 reciprocates up and down to make the pulse aeration mechanism 7 alternately inhale, compress and exhaust, thereby realizing the pulse aeration function; synchronously, the up and down movement of the piston 14 drives the push rod 25, the fixing frame 26, and the dredging needle 27 to reciprocate up and down, so that the dredging needle 27 is reciprocatedly inserted and pulled out from the nozzle 28, thereby realizing the function of dredging the nozzle 28; the high-pressure airflow generated by the pulse aeration passes through the first air channel 32 and the second air channel 33 to alternately push the first push block 35 and the second push block 37 to reciprocate, thereby shaking the filter bag 40 to move, thereby avoiding the problem of dust accumulation in the filter bag 40 blocking the air intake.

[0044] The piston 14 is driven up and down by the motor 8, which not only produces a pulse aeration function, but also can be linked to enable the unblocking needle 27 to achieve the function of unblocking the nozzle 28, and the synchronous linkage can achieve the effect of shaking the filter bag 40 to avoid dust accumulation and blockage.

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

Claims

1. An ammonia-based desulfurization and co-oxidation treatment device, characterized in that: It includes a bottom kettle (1), and the bottom kettle (1) is successively provided with an exhaust pipe (2), a spraying layer (5), an air supplementing layer (6), an exhaust gas inlet (3), a pulse aeration mechanism (7), and a liquid discharge pipe (4) from top to bottom. 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 disposed inside the outer cylinder (9). The inner cylinder (10) is of a tubular structure. The main air pipe (29) communicates with the inside of the inner cylinder (10). The inner circumferential surface of the outer cylinder (9) is tightly and sealingly disposed against the outer circumferential surface of the inner cylinder (10). The outer cylinder (9) is provided with a first ventilation outer hole (11), and the inner cylinder (10) is provided with a first ventilation inner hole (12) matching the first ventilation outer hole (11). The motor (8) is used to drive the inner cylinder (10) to rotate relative to the outer cylinder (9).

2. The ammonia desulfurization and co-oxidation treatment equipment according to claim 1, characterized in that: 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) are further disposed inside the inner cylinder (10). The rotating shaft (13) and the piston (14) are both located inside the inner cylinder (10). The rotating shaft (13) coincides with the axis of the inner cylinder (10) and is fixedly connected to the bottom of the inner cylinder (10). A spiral chute (16) connected end to end is disposed on the circumferential surface of the rotating shaft (13). A slider (17) matching the chute (16) is disposed inside the chute (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). The main air pipe (29) communicates with the first air pipe (18) and the second air pipe (20) respectively. The first air pipe (18) successively passes through the outer cylinder (9) and the piston (14). A sealing connection is provided between the first air pipe (18) and the outer cylinder (9). A sliding connection is provided between the first air pipe (18) and the piston (14). A first one-way valve (19) is disposed at the air outlet end of the first air pipe (18). The second air pipe (20) passes through the outer cylinder (9) and extends above the piston (14). A sealing connection is provided between the second air pipe (20) and the piston (14). A second one-way valve (21) is disposed at the air outlet end of the second air pipe (20). The outer cylinder (9) is provided with a second ventilation outer hole (22), and the inner cylinder (10) is provided with a second ventilation inner hole (23) matching the second ventilation outer hole (22). The first ventilation outer hole (11) and the first ventilation inner hole (12) are located above the piston (14). The second ventilation outer hole (22) and the second ventilation inner hole (23) are located below the piston (14). The first ventilation inner hole (12) and the second ventilation inner hole (23) are respectively located on the opposite sides of the inner cylinder (10).

3. The ammonia desulfurization and co-oxidation treatment equipment according to claim 2, characterized in that: A hemispherical shell (24) is provided on the outer cylinder (9). The hemispherical shell (24) is buckled above the first ventilation outer hole (11) and the second ventilation outer hole (22), and there is a gap between them. The hemispherical shell (24) is fixedly connected to the outer cylinder (9).

4. A method for treating ammonia desulfurization and co-oxidation, characterized in that: A push rod (25) is provided on the piston (14). The push rod (25) passes through the outer cylinder (9) and is slidably and sealingly connected to the outer cylinder (9). One end of the push rod (25) is fixedly connected to the piston (14), and the other end of the push rod (25) is fixedly connected to a fixing frame (26). A dredging needle (27) is provided on the fixing frame (26). A spray head (28) is provided in the spray layer (5). The dredging needle (27) can be reciprocally inserted into and pulled out of the spray head (28).

5. The ammonia desulfurization and co-oxidation treatment equipment according to claim 4, characterized in that: There are multiple pulse aeration mechanisms (7), and a transmission mechanism (42) is provided between the pulse aeration mechanism (7) and the motor (8).

6. The ammonia-based desulfurization and co-oxidation treatment equipment according to claim 5, characterized in that: A filter cylinder (30) is provided outside the tower kettle (1). 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 exhaust port (41), a filter bag (40) is provided in the filter cylinder (30), the filter bag (40) is located between the high-pressure air inlet pipe (31) and the exhaust port (41), and the exhaust port (41) communicates with the main air pipe (29) and the air supplement layer (6).

7. An ammonia-based desulfurization and co-oxidation treatment device according to claim 6, characterized in that: A fixing ring (39) is provided in the middle of the filter bag (40). The filter cylinder (30) is provided with a first air passage (32) and a second air passage (33). One end of the first air passage (32) communicates with the first ventilation outer hole (11), the other end of the first air passage (32) is fixedly connected to the filter cylinder (30), one end of the second air passage (33) communicates with the second ventilation outer hole (22), the other end of the second air passage (33) is fixedly connected to the filter cylinder (30), the first air passage (32) and the second air passage (33) are respectively located on the opposite sides of the filter cylinder (30), a first push block (35) and a first push rod (36) are provided in the first air passage (32), the first push rod (36) and the second push rod (38) respectively 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), the other end of the second push rod (38) is fixedly connected to the fixing ring (39), and a plurality of exhaust holes (34) are provided at the ends of the first air passage (32) and the second air passage (33). A part of the exhaust holes (34) is located between the first push block (35) and the filter cylinder (30), and a part of the exhaust holes (34) is located between the second push block (37) and the filter cylinder (30).

8. The ammonia desulfurization and co-oxidation treatment equipment according to claim 4, characterized in that: The transmission mechanism (42) includes a first transmission rod (43), a second transmission rod (44), and a third transmission rod (45). A gear meshing connection is provided between the first transmission rod (43) and the second transmission rod (44), a gear meshing transmission connection is provided between the second transmission rod (44) and the third transmission rod (45), and a gear meshing connection is provided between the third transmission rod (45) and the rotating shaft (14).

9. An ammonia-based desulfurization and co-oxidation treatment process, based on the equipment described in any one of claims 1-8, characterized in that, It includes the following steps: S1. Spray ammonia water from the spray layer (5) to make reverse contact reaction with the sulfur-containing waste gas below to generate ammonium sulfite; S2. During the gravity sedimentation process of ammonium sulfite, introduce a large amount of oxygen-containing air through the air supplement layer (6) to partially oxidize ammonium sulfite; S3. Carry out pulse aeration oxidation on the solution collected at the bottom of the tower kettle (1) through the pulse aeration mechanism (7) to completely convert ammonium sulfite into ammonium sulfate.

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