Waste gas desulfurization and denitrification treatment device

Abstract

The invention relates to the field of waste gas treatment, in particular to a waste gas desulfurization and denitrification treatment device, and solves the problem of insufficient contact between waste gas and absorption liquid. A spraying mechanism comprises a liquid inlet pipe connected with a liquid inlet, the end, away from the liquid inlet, of the liquid inlet pipe is rotationally connected with a rotating pipe, the rotating pipe is provided with a plurality of liquid distribution pipes, the ends, away from the rotating pipe, of the liquid distribution pipes are rotationally connected with a spraying pipe, and the spraying pipe is provided with a plurality of spraying openings. The first platform and the second platform are rotationally arranged in the tank body, ventilation openings are formed in the middles of the first platform and the second platform, a baffle is arranged between the two ventilation openings, the spraying pipe rotationally penetrates through the first platform and the second platform, gears A are arranged at the bottom of the spraying pipe, and annular racks in meshed connection with the gears A are fixedly arranged in the tank body; the contact area and contact time of absorption liquid and waste gas can be increased, the utilization rate of the absorption liquid is increased, the absorption liquid and the waste gas are in full contact, and the desulfurization and denitrification effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment, and in particular to a waste gas desulfurization and denitrification treatment device. Background Art

[0002] Waste gas mainly refers to the flue gas produced by the combustion of fuels such as coal tar, natural gas, petroleum coke powder and even raw coal in boilers or kilns in heavy pollution industries such as power plants, heating boilers, and glass manufacturing. Its main components include dust, sulfur oxides, nitrogen oxides and other harmful substances. If it is not treated and directly discharged into the air, it will not only pollute the ecological environment and endanger human health, but also corrode production equipment and have an adverse effect on the entire production process. Therefore, it is necessary to desulfurize and denitrify the waste gas.

[0003] At present, for the desulfurization and denitrification treatment of waste gas, a wet process in which the absorption liquid reacts with the waste gas for desulfurization and denitrification is often used. The conventional method is through a treatment tank (treatment tower). The treatment tank body is provided with an air outlet, a liquid inlet, an air inlet and a liquid outlet from top to bottom. A spray mechanism connected to the liquid inlet is provided in the tank body. The absorption liquid is sprayed in the tank body through the liquid inlet and the spray mechanism. The waste gas enters the tank body through the air inlet, and is discharged through the air outlet after contacting with the absorption liquid. The absorption liquid is discharged through the liquid outlet after contacting with the waste gas.

[0004] Among them, the effect of desulfurization and denitrification depends on whether the absorption liquid is in sufficient contact with the exhaust gas, and whether the contact is sufficient is related to the contact time. The existing treatment tanks usually directly utilize the upward flow of the absorption liquid and the downward flow of the exhaust gas to achieve contact, so that the residence time of the exhaust gas and the absorption liquid in the tank body is short, and the contact time is relatively short, resulting in insufficient contact, which to a certain extent affects the effect of desulfurization and denitrification. It may even be necessary to carry out multiple desulfurization and denitrification because the effect of the exhaust gas after treatment does not meet the standard.

[0005] Therefore, the present invention provides a waste gas desulfurization and denitrification treatment device to solve the above problems. Summary of the invention

[0006] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a waste gas desulfurization and denitrification treatment device. The technical problem to be solved is: to provide a waste gas desulfurization and denitrification treatment device that can change the movement trajectory of the waste gas, increase the movement time of the waste gas, make the absorption liquid fully contact with the waste gas, and have good desulfurization and denitrification effects.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is: A waste gas desulfurization and denitration treatment device, comprising a tank body, the tank body is provided with an air outlet, a liquid inlet, an air inlet and a liquid outlet, the tank body is provided with a spray mechanism connected with the liquid inlet, the spray mechanism comprises a liquid inlet pipe connected with the liquid inlet, the end of the liquid inlet pipe away from the liquid inlet is rotatably connected with a rotating pipe, the rotating pipe is provided with a plurality of liquid distributing pipes, the end of the liquid distributing pipe away from the rotating pipe is rotatably connected with a spray pipe, the spray pipe is provided with a plurality of spray ports, and also comprises a first platform and a second platform arranged up and down, the first platform and the second platform are rotatably arranged in the tank body, and a vent is opened in the middle, and a baffle is provided between the two vents, the spray pipe is rotatably penetrated through the first platform and the second platform, and a gear A is provided at the bottom, an annular rack meshing with each gear A is fixedly provided in the tank body, and also comprises a control mechanism for controlling the rotation of the first platform and the second platform; During operation, the exhaust gas rises through the vent on the second platform, moves toward the periphery after contacting the baffle, bypasses the baffle, and then rises through the vent on the first platform. At the same time, the rotation of the first platform and the second platform is controlled by the control mechanism. When the spray pipe rotates with the first platform and the second platform, it also rotates itself to spray.

[0008] Preferably, a guide tube is connected to the bottom of the air vent of the second platform, a guide cover is provided at the bottom of the guide tube, the guide cover is fixedly arranged in the tank body, a support plate is provided on the guide cover, the control mechanism includes a control motor arranged on the support plate, the control motor is connected to a transmission rod, the transmission rod passes through two air holes in sequence and is penetrated through the baffle, a transmission plate is provided on the top of the transmission rod, and the spray pipe is rotatably penetrated through the transmission plate.

[0009] Preferably, a fan blade is provided at a position corresponding to the transmission rod and the vent, and a guide plate is provided at the bottom of the baffle.

[0010] Preferably, a gear B is provided on the top of the spray pipe, and gear B is an incomplete gear. A frame is slidably provided on the transmission plate, and a latch matching gear B is provided on the opposite side of the frame, and can be meshed and connected with gear B. A connecting rod is provided on one side of the frame, and the connecting rod passes through the first platform, and a scraper rod is provided at a position corresponding to the upper and lower sides of the first platform and the upper side of the second platform, and a through groove for the movement of the connecting rod is opened on the first platform.

[0011] Preferably, the liquid dispensing tube is rotatably and slidably connected to the spraying tube, and a plurality of through holes are provided on the portion located in the spraying tube, and a hinged rod is hingedly connected between the frame and the liquid dispensing tube.

[0012] Preferably, the liquid inlet pipe and the liquid dispensing pipe are both made of hard material, and the liquid inlet pipe includes a telescopic section.

[0013] Preferably, a stirring arm is provided on the inner wall of the spray pipe.

[0014] Preferably, an auxiliary support member is provided at the bottom of the second platform, and the auxiliary support member is rotatably connected to gear A.

[0015] Preferably, the spray mechanism is detachably connected to the tank body.

[0016] The beneficial effects of the present invention are: 1. When the present invention is working, the exhaust gas rises through the vent on the second platform, moves to the circumference after contacting the baffle, bypasses the baffle, and then rises through the vent on the first platform, which can increase the movement distance of the exhaust gas and slow down the rising speed of the exhaust gas, thereby increasing the contact time between the exhaust gas and the absorption liquid. At the same time, the first platform and the second platform are controlled to rotate by the control mechanism. When the spray pipe rotates with the first platform and the second platform, it also rotates itself to spray. The absorption liquid sprayed on the baffle is also affected by the centrifugal force and then moves to the circumference, increasing the lateral movement distance of the absorption liquid and slowing down the descent speed of the absorption liquid. Therefore, the present invention can increase the contact area and contact time between the absorption liquid and the exhaust gas, improve the utilization rate of the absorption liquid, make the absorption liquid fully contact with the exhaust gas, and improve the desulfurization and denitrification effect.

[0017] 2. The rotation direction of the spray pipe in the present invention is opposite to the rotation direction of the first platform and the second platform, and can also play a certain stirring and mixing role on the absorption liquid in the spray pipe, so that the absorption liquid itself reacts fully and improves the desulfurization and denitrification effect.

[0018] 3. In the specific operation of the present invention, the air outlet, liquid inlet, air intake and liquid outlet are respectively adjacent to the corresponding equipment, and then only the control motor 22 needs to be started, which is simple and convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the tank body in the present invention; Figure 3 It is a schematic diagram of the overall structure of the spray mechanism in the present invention; Figure 4 It is a schematic diagram of the overall structure of the spray mechanism in the present invention at another angle; Figure 5 for Figure 3 The enlarged schematic diagram of point A in the middle; Figure 6 for Figure 3 The enlarged schematic diagram of point B in the middle; Figure 7 It is a schematic diagram of the structure of the fan blade and the guide plate in the present invention; Figure 8 It is a schematic diagram of the connection between the hinged rod, the frame and the liquid dispensing tube in the present invention.

[0020] In the figure: 1. tank body, 2. air outlet, 3. liquid inlet, 4. air inlet, 5. liquid outlet, 6. ring body, 7. liquid inlet pipe, 8. rotating pipe, 9. liquid dispensing pipe, 10. transmission plate, 11. transmission rod, 12. spray pipe, 13. first platform, 14. second platform, 15. ring rack, 16. gear A, 17. auxiliary support, 18. guide tube, 19. guide cover, 20. baffle, 21. support plate, 22. control motor, 23. frame, 24. gear B, 25. through groove, 26. scraper rod, 27. connecting rod, 28. fan blade, 29. guide plate, 30. hinge rod. DETAILED DESCRIPTION

[0021] The following will refer to the attached Figures 1 to 8 The embodiments of the present invention are described in detail. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0022] A waste gas desulfurization and denitrification treatment device, as shown in the attached Figure 1 , Figure 2 , Figure 3 As shown, it includes a cylindrical tank body 1, on which an air outlet 2, a liquid inlet 3, an air inlet 4 and a liquid outlet 5 are arranged from top to bottom. A spray mechanism connected to the liquid inlet 3 is arranged in the tank body 1, and the height of the spray mechanism is located between the liquid inlet 3 and the air inlet 4. The absorption liquid is sprayed into the tank body 1 through the liquid inlet 3 and the spray mechanism. The exhaust gas enters the tank body 1 through the air inlet 4, and is discharged through the air outlet 2 after contacting and reacting with the absorption liquid. The absorption liquid is discharged through the liquid outlet 5 after contacting with the exhaust gas. This part of the mechanism is the existing technology and will not be described in detail here.

[0023] Among them, the spray mechanism includes a liquid inlet pipe 7 connected to the liquid inlet 3, and the end of the liquid inlet pipe 7 away from the liquid inlet 3 is rotatably connected to a rotating pipe 8, and the rotating axis is in the vertical direction. A plurality of liquid dispensing pipes 9 are arranged on the rotating pipe 8, and four liquid dispensing pipes 9 are arranged in this embodiment. In this embodiment, the liquid inlet pipe 7 and the liquid dispensing pipe 9 are both in an inverted "L" shape and are made of hard material. The end of the liquid dispensing pipe 9 away from the rotating pipe 8 is rotatably connected to a spray pipe 12 in the vertical direction, and the rotating axis is in the vertical direction. A plurality of spray ports are arranged on the body of the spray pipe 12. When the infusion device is connected to the external infusion device through the liquid inlet 3, the absorption liquid passes through the liquid inlet pipe 7, the rotating pipe 8 and the liquid dispensing pipe 9 in turn, and is finally sprayed out by each spray pipe 12, and when the spray pipes 12 rotate together with the rotating pipe 8, the spray pipe 12 itself can rotate relative to the liquid dispensing pipe 9, that is, the spray pipe 12 can revolve and rotate at the same time.

[0024] It also includes a first platform 13 and a second platform 14 arranged up and down, the first platform 13 and the second platform 14 are both disc-shaped, the first platform 13 and the second platform 14 are arranged in the tank body 1 by circumferential rotation, the rotation axis is in the vertical direction and is coaxial with the rotating tube 8, the first platform 13 and the second platform 14 are provided with a vent in the middle, and a baffle 20 is provided between the two vents, the diameter of the baffle 20 is larger than the two vents, the spray pipe 12 is rotatably passed through the first platform 13 and the second platform 14, and a gear A16 is provided at the bottom, an annular rack 15 meshingly connected to each gear A16 is fixedly provided in the tank body 1, the annular rack 15 is fixedly arranged in the tank body 1 through the circumferential side, when the spray pipes 12 rotate together with the rotating tube 8, that is, when they revolve, the gear A16 and the annular rack 15 drive the spray pipe 12 to rotate itself, that is, rotate, and the first platform 13 and the second platform 14 rotate adaptively.

[0025] The control mechanism further includes a control mechanism for directly or indirectly controlling the rotation of the first platform 13 and the second platform 14. In this embodiment, a cylindrical guide tube 18 is connected to the bottom of the vent of the second platform 14, and a chamfered cone-shaped guide cover 19 is provided at the bottom of the guide tube 18. The guide cover 19 is fixedly arranged in the tank body 1 through the circumferential side, and a support plate 21 is provided on the guide cover 19. The control mechanism includes a control motor 22 fixedly arranged on the support plate 21 along the vertical direction, and the control motor 22 is connected to a transmission rod 11, which passes through two vents in turn and is fixedly penetrated in the baffle plate 20. A transmission plate 10 is provided on the top of the transmission rod 11. The transmission plate 10 is in a "cross" shape and can rotate the four spray pipes 12 respectively and penetrate one end of the transmission plate 10, that is, the transmission rod 11 is driven to rotate by the rotation of the control motor 22, and the transmission rod 11 drives the baffle plate 20 and the transmission plate 10 to rotate, and the transmission plate 10 drives the spray pipe 12, the first platform 13, and the second platform 14 to move.

[0026] Working principle: When the movement trajectory of the exhaust gas rises from the bottom of the spray mechanism, it first passes through the guide cover 19 and the guide tube 18, and then passes through the vent of the second platform 14. Due to the obstruction of the baffle 20, the exhaust gas will first move to the circumference to bypass the baffle 20, and then rise through the through hole on the first platform 13, so as to change the traditional direct rising trajectory of the waste; when the control motor 22 rotates, the spray pipe 12 revolves while rotating, and the rotation direction is opposite to the revolution direction, so that the absorption liquid in the spray pipe 12 can be shaken to a certain extent, and then sprayed to various positions in the tank body 1 through the spray port.

[0027] When the present invention is used, the air outlet 2, the liquid inlet 3, the air inlet 4 and the liquid outlet 5 are respectively adjacent to the corresponding equipment, and then only the control motor 22 needs to be started, which is simple and convenient to operate. Compared with the traditional direct upstream passage of exhaust gas, the present invention changes the movement trajectory of the exhaust gas, increases the movement distance and movement time of the exhaust gas, and increases the residence time of the exhaust gas in the tank body 1, which is conducive to more sufficient contact between the absorption liquid and the exhaust gas. Compared with the traditional fixed setting, the spray pipe 12 can spray various positions in the tank body 1 through revolution and rotation. Spraying, even when one of the spray pipes 12 is blocked, the cooperation of multiple spray pipes 12 can ensure uniform spraying in the entire tank body 1. During the spraying process, the absorption liquid falling on the baffle 20 will be affected by the centrifugal force and move toward the side, increasing the lateral movement distance of the absorption liquid and slowing down the falling speed of the absorption liquid. In addition, by causing a certain amount of shaking of the absorption liquid in the spray pipe 12, the absorption liquid itself can react fully, thereby improving the utilization rate of the absorption liquid in the whole process, making the absorption liquid fully contact with the exhaust gas, and improving the desulfurization and denitrification effect.

[0028] In addition, it should be noted that in the present embodiment, only one first platform 13 and one second platform 14 are respectively provided, and only one baffle 20 is provided. In actual production and use, the number of the first platform 13, the second platform 14 and the baffle 20 can be appropriately increased to further change the movement trajectory and time of the exhaust gas, increase the contact time with the absorption liquid, and further increase the desulfurization and denitrification effects.

[0029] In addition, it should be noted that in the present embodiment, four ring bodies 6 are provided in the tank body 1, and the first platform 13, the second platform 14, the annular rack 15 and the air guide cover 19 correspond to one ring body 6 respectively, and are connected to the tank body 1 through the ring body 6, and the first platform 13, the second platform 14 and the air guide cover 19 are sealed and rotatably connected to the tank body 1 through the ring body 6, which can separate the annular rack 15 and the gear A16 from the reaction space, play a certain protective role for the annular rack 15 and the gear A16, and can also avoid the first platform 13 and the second platform 14 from being connected from the outside, thereby ensuring the movement trajectory of the airflow and the absorption liquid.

[0030] In addition, it should be noted that in the present embodiment, the spray mechanism is detachably connected to the tank body 1. Specifically, the peripheral side of the ring body 6 is connected to the ring body 6 by bolts, which can be fixedly installed from the outside of the tank body 1, and a flexible rubber sealing layer is provided on the peripheral side of the ring body 6. The first platform 13, the second platform 14 and the guide cover 19 are sealingly and rotatably connected to the corresponding ring body 6. After the entire spray mechanism is removed, it is convenient to clean and inspect the entire spray mechanism, and it is also convenient to clean the inside of the tank body 1.

[0031] As attached Figure 2 , Figure 3 , Figure 7As shown, in this embodiment, a fan blade 28 is provided at the position corresponding to the transmission rod 11 and the vent, and a guide plate 29 is provided at the bottom of the baffle 20. The specific shapes of the fan blade 28 and the guide plate 29 are shown in the attached Figure 7 As shown, in this embodiment, the rotation direction of the transmission rod 11 is counterclockwise, and an upward airflow is generated through the fan blades 28 to achieve diversion. Specifically, the fan blades 28 located at the bottom cooperate with the guide tube 18 and the guide cover 19 to guide the exhaust gas below the tank body 1 to the lower side of the baffle 20. When the airflow reaches the bottom of the baffle 20, it is pushed by the guide plate 29 to move to the circumferential side, and then naturally rises, and then the exhaust gas is diverted to the top of the tank body 1 through the upper fan blades 28, thereby assisting in controlling the movement trajectory of the exhaust gas airflow.

[0032] In addition, it should be noted that in the prior art, a structure for guiding air flow has been used through a fan device. Although this structure increases the movement time of the air flow to a certain extent, it can ensure the movement trajectory of the entire air flow. Compared with the prior art, this embodiment can still increase the movement distance and time of the air flow, which helps to improve the desulfurization and denitrification effects.

[0033] As attached Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, a gear B24 is provided on the top of the spray pipe 12, and the gear B24 is an incomplete gear. A frame 23 is slidably provided on the transmission plate 10, and a latching tooth adapted to the gear B24 is provided on the opposite side of the frame 23, and can be meshed and connected with the gear B24. A connecting rod 27 is provided on one side of the frame 23, and the connecting rod 27 passes through the first platform 13 in the vertical direction, and a scraper rod 26 is provided at the corresponding positions of the upper and lower sides of the first platform 13 and the upper side of the second platform 14, and a through groove 25 for the movement of the connecting rod 27 is opened on the first platform 13.

[0034] Working principle: When the gear B24 rotates, it intermittently engages with the teeth on both sides to realize the reciprocating motion of the control frame 23. When the frame 23 reciprocates, the frame 23 drives the connecting rod 27 and the three scraper rods 26 to reciprocate in turn, so that when the control motor 22 rotates, the scraper rod 26 can scrape the upper and lower sides of the first platform 13 and the upper side of the second platform 14, and can push the absorption liquid on the first platform 13 and the second platform 14 inward and fall into the ventilation hole, thereby playing a certain liquid guiding role, and to a certain extent can avoid residual absorption liquid on the first platform 13 and the second platform 14. In specific use, when the desulfurization and denitrification process is completed, the control motor 22 can continue to be controlled to rotate for a certain time to achieve a certain self-cleaning effect.

[0035] In addition, it should be noted that, since the absorption liquid that the baffle 20 contacts will move toward the peripheral side due to the centrifugal force during the rotation process, that is, not much absorption liquid will remain on the baffle 20, it is not necessary to provide a corresponding hanging mechanism for the baffle 20.

[0036] In addition, it should be noted that the gear B24 and the frame 23 are both located on the upper side of the transmission plate 10, and the spraying height of the spray pipe 12 is lower than the transmission plate 10, so that the absorption liquid will not fall on the gear B24 and the frame 23, which can play a certain protective role for the gear B24 and the frame 23.

[0037] In this embodiment, the liquid dispensing tube 9 is connected to the spraying tube 12 by rotation and sliding, and the sliding direction is along the vertical direction. A plurality of through holes are provided on the portion located inside the spraying tube 12. The through holes can be referred to in the attached drawings. Figure 8 As shown, a hinged rod 30 is hinged between the frame 23 and the liquid dispensing tube 9, that is, the hinged rod 30 is hinged to the frame 23 and the liquid dispensing tube 9 respectively, and the hinge axis is along the horizontal direction.

[0038] Working principle: The absorption liquid is discharged into the spray pipe 12 through the through hole on the liquid dispensing pipe 9, and then discharged into the tank body 1 through the spray port on the spray pipe 12. When the frame 23 reciprocates, the relative position of the frame 23 and the corresponding liquid dispensing pipe 9 is changed, the height of the frame 23 remains unchanged, and the height of the hinged end of the hinged rod 30 and the frame 23 remains unchanged, so that the position of the hinged end of the hinged rod 30 and the liquid dispensing pipe 9 changes, that is, the frame 23 reciprocates and moves up and down, so that the part of the liquid dispensing pipe 9 located in the spray pipe 12 can It can stir the absorption liquid in the spray pipe 12 to a certain extent, and coordinate with its own revolution and the revolution and rotation of the spray pipe 12 to stir the absorption liquid, so that the absorption liquid can move in multiple directions in the spray pipe 12, mix itself evenly, react completely, and then be discharged from the spray pipe 12 to react with the exhaust gas, thereby improving the desulfurization and denitrification effect. In this embodiment, a stirring arm (not shown) is provided on the inner wall of the spray pipe 12, and the stirring arm is always not in contact with the liquid separation pipe 9, which further increases the stirring effect.

[0039] In addition, it should be noted that since the liquid dispensing tube 9 performs lifting and lowering motion, the liquid inlet tube 7 needs to move adaptively. In this embodiment, the liquid inlet tube 7 and the liquid dispensing tube 9 are both in an inverted "L" shape and are both made of hard materials. The vertical part of the liquid inlet tube 7 is set as a telescopic structure to adapt to the lifting and lowering motion of the liquid dispensing tube 9. In addition, the liquid inlet tube 7 can also be made of flexible and deformable pipes to adapt to the lifting and lowering motion of the liquid dispensing tube 9.

[0040] In this embodiment, an auxiliary support member 17 is provided at the bottom of the second platform 14 , and the auxiliary support member 17 is rotatably connected to the gear A16 to auxiliary support the spray pipe 12 .

[0041] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0042] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A waste gas desulfurization and denitrification treatment device, comprising a tank body (1), the tank body (1) being provided with an air outlet (2), a liquid inlet (3), an air inlet (4) and a liquid outlet (5), the tank body (1) being provided with a spray mechanism connected to the liquid inlet (3), characterized in that: The spray mechanism comprises a liquid inlet pipe (7) connected to the liquid inlet (3), the end of the liquid inlet pipe (7) away from the liquid inlet (3) is rotatably connected to a rotating pipe (8), a plurality of liquid dispensing pipes (9) are provided on the rotating pipe (8), the end of the liquid dispensing pipe (9) away from the rotating pipe (8) is rotatably connected to a spray pipe (12), the spray pipe (12) is provided with a plurality of spray ports, and further comprises a first platform (13) and a second platform (14) arranged up and down, the first platform (13) and the second platform (14) are rotatably arranged in the tank body (1), and a vent is opened in the middle, and a baffle (20) is provided between the two vents, the spray pipe (12) is rotatably passed through the first platform (13) and the second platform (14), and a gear A (16) is provided at the bottom, an annular rack (15) meshingly connected to each gear A (16) is fixedly provided in the tank body (1), and further comprises a control mechanism for controlling the rotation of the first platform (13) and the second platform (14); During operation, the exhaust gas rises through the vent on the second platform (14), contacts the baffle (20), moves toward the circumference, bypasses the baffle (20), and then rises through the vent on the first platform (13). At the same time, the first platform (13) and the second platform (14) are controlled to rotate by the control mechanism. When the spray pipe (12) rotates with the first platform (13) and the second platform (14), it also rotates itself to spray.

2. The exhaust gas desulfurization and denitrification treatment device according to claim 1, characterized in that: The bottom of the vent of the second platform (14) is connected to a guide tube (18), the bottom of the guide tube (18) is provided with a guide cover (19), the guide cover (19) is fixedly arranged in the tank body (1), a support plate (21) is provided on the guide cover (19), the control mechanism comprises a control motor (22) arranged on the support plate (21), the control motor (22) is connected to a transmission rod (11), the transmission rod (11) passes through two vent holes in sequence and is penetrated by the baffle (20), a transmission plate (10) is provided on the top of the transmission rod (11), and the spray pipe (12) is rotatably penetrated by the transmission plate (10).

3. The exhaust gas desulfurization and denitrification treatment device according to claim 2, characterized in that: A fan blade (28) is provided at a position corresponding to the transmission rod (11) and the vent, and a guide plate (29) is provided at the bottom of the baffle (20).

4. The exhaust gas desulfurization and denitrification treatment device according to claim 2, characterized in that: A gear B (24) is provided at the top of the spray pipe (12), and the gear B (24) is an incomplete gear. A frame (23) is slidably provided on the transmission plate (10), and a latching tooth adapted to the gear B (24) is provided on the opposite side of the frame (23) and can be meshed and connected with the gear B (24). A connecting rod (27) is provided on one side of the frame (23), and the connecting rod (27) passes through the first platform (13), and a scraper rod (26) is provided at the corresponding positions of the upper and lower sides of the first platform (13) and the upper side of the second platform (14), and a through groove (25) for the connecting rod (27) to move is opened on the first platform (13).

5. The exhaust gas desulfurization and denitrification treatment device according to claim 2, characterized in that: The liquid dispensing pipe (9) is rotatably and slidably connected to the spray pipe (12), and a portion located inside the spray pipe (12) is provided with a plurality of through holes. A hinged rod (30) is hingedly connected between the frame (23) and the liquid dispensing pipe (9).

6. The exhaust gas desulfurization and denitrification treatment device according to claim 5, characterized in that: The liquid inlet pipe (7) and the liquid dispensing pipe (9) are both made of hard material, and the liquid inlet pipe (7) comprises a telescopic section.

7. A waste gas desulfurization and denitrification treatment device according to any one of claims 1 to 6, characterized in that: The inner wall of the spray pipe (12) is provided with a stirring arm.

8. A waste gas desulfurization and denitrification treatment device according to any one of claims 1 to 6, characterized in that: An auxiliary support member (17) is provided at the bottom of the second platform (14), and the auxiliary support member (17) is rotatably connected to the gear A (16).

9. A waste gas desulfurization and denitrification treatment device according to any one of claims 1 to 6, characterized in that: The spray mechanism is detachably connected to the tank body (1).

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