A multi-stage exhaust gas purification device

Abstract

The application discloses a multistage waste gas purification device, and belongs to the technical field of waste gas purification, which comprises a spraying tower, an air inlet pipe and an air outlet pipe, a liquid storage cavity is arranged on one side of the spraying tower, a variable speed water pump is arranged between the liquid storage cavity and the spraying tower, a gas quality sensor is arranged in the air inlet pipe, a spraying main pipe is rotatably connected to the bottom end of a spraying frame, a hydraulic drive mechanism for driving the spraying main pipe to rotate is arranged on the spraying frame, the output end of the variable speed water pump is communicated with the hydraulic drive mechanism, a plurality of spraying mechanisms are arranged in the spraying main pipe from top to bottom, the spraying mechanisms are respectively communicated with the spraying main pipe, an adjusting piston is slidably arranged in the spraying main pipe, and a centrifugal self-adjusting drive mechanism for driving the adjusting piston to slide along the spraying main pipe is arranged at the bottom end of the spraying main pipe. The multistage waste gas purification device can monitor the concentration of air pollutants, and a plurality of spraying mechanisms are arranged, the spraying liquid flow and spraying levels are automatically adjusted according to the concentration of waste gas pollutants.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of waste gas purification, and particularly relates to a multi-stage waste gas purification device. BACKGROUND

[0002] Waste gas purification, also known as waste gas treatment, is a key environmental protection process aimed at ensuring that the waste gas generated by industrial sites and factory workshops meets the national emission standards before being discharged into the external environment.

[0003] For waste gas containing particulate matter, water droplets or other liquid droplets can be used to collide with the particulate matter by spraying, so that the particulate matter is coagulated and enlarged, facilitating the capture and separation of harmful components in the waste gas, thereby achieving the effect of dust removal.

[0004] However, many industrial production processes are not continuously and stably operated, resulting in large fluctuations in the concentration of waste gas emissions. For example, in different production stages of the coating industry, the concentration of VOCs in the waste gas may change by several times or even dozens of times. High-concentration waste gas may exceed the treatment capacity of the treatment equipment, resulting in a decrease in treatment effect. Low-concentration waste gas may cause waste of the spraying liquid. SUMMARY

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present application provides a multi-stage waste gas purification device which can monitor the concentration of air pollutants and set multiple spraying mechanisms to automatically adjust the spraying liquid flow and spraying levels according to the concentration of waste gas pollutants.

[0006] The technical scheme adopted by the present application is as follows: The multi-stage waste gas purification device provided by the present application comprises a spraying tower, an air inlet pipe and an air outlet pipe. The air inlet pipe is connected with the side wall of the spraying tower. The air outlet pipe is connected with the upper end of the spraying tower. A self-rotating cyclone mechanism is rotatably connected to the end of the air inlet pipe. A liquid storage cavity is arranged on one side of the spraying tower. A variable speed water pump is arranged between the liquid storage cavity and the spraying tower. The input end of the variable speed water pump is communicated with the liquid storage cavity through a pipeline. A gas mass sensor is arranged in the air inlet pipe. A spraying frame is arranged in the upper part of the spraying tower. A spraying main pipe is rotatably connected to the bottom end of the spraying frame. A water-driven mechanism is arranged on the spraying frame to drive the spraying main pipe to rotate. The output end of the variable speed water pump is communicated with the water-driven mechanism through a pipeline. The water-driven mechanism is communicated with the spraying main pipe. The spraying main pipe is provided with multiple layers of spraying mechanisms which are communicated with the spraying main pipe from top to bottom. An adjusting piston is slidably and sealingly arranged in the spraying main pipe. An adjusting rod is arranged at the lower end of the adjusting piston. The adjusting rod is slidably connected to the bottom end of the spraying main pipe. A centrifugal self-adjusting driving mechanism is arranged at the bottom end of the spraying main pipe to drive the adjusting piston to slide along the spraying main pipe. The centrifugal self-adjusting driving mechanism is connected with the adjusting rod. The air inlet pipe is arranged below the centrifugal self-adjusting driving mechanism.

[0007] Preferably, the spray tower side wall is provided with a control assembly electrically connected with the variable speed water pump and the gas mass sensor respectively.

[0008] The intake pipe is arranged in an inverted L shape, the autorotation cyclone mechanism comprises an autorotation ring cavity and jet pipes arranged in an array around the circumference of the autorotation ring cavity, the autorotation ring cavity is rotationally arranged at the end of the intake pipe and is in communication with the intake pipe, the jet pipes are arranged in an L shape and are in communication with the side wall of the autorotation ring cavity, and the gas outlet direction of the jet pipes is perpendicular to the inner wall of the spray tower.

[0009] The exhaust gas is sent into the autorotation ring cavity through the intake pipe and is vertically sprayed out to the inner wall of the spray tower through the jet pipes, the airflow generates a reaction force on the jet pipes to drive the autorotation ring cavity to rotate, so that the exhaust gas is uniformly distributed in the spray tower, the rotation of the jet pipes sprays gas to form a spiral airflow, and the spiral upward airflow mode can effectively prolong the residence path and residence time of the exhaust gas in the tower, thereby creating sufficient time conditions for the purification reaction.

[0010] Further, the water power driving mechanism comprises a driving seat, a driving shaft, an autorotation impeller, a liquid inlet pipe, a driving bevel gear and a driven bevel gear ring, the driving seat is arranged at the bottom of the spray frame, the driving seat is internally provided with a driving cavity and a transmission cavity, the driving shaft is coaxially rotationally arranged in the driving cavity, the autorotation impeller is coaxially fixedly connected to the driving shaft and arranged in the driving cavity, the liquid inlet pipe is in communication with one side of the driving cavity and is arranged along the tangent direction of the driving cavity, the output end of the variable speed water pump is in communication with the liquid inlet pipe through a pipeline, the spray main pipe rotationally penetrates the transmission cavity, the driving bevel gear is rotationally arranged in the transmission cavity and coaxially fixedly connected to the driving shaft, and the driven bevel gear ring is coaxially fixedly arranged outside the spray main pipe and arranged in the transmission cavity, and the driving bevel gear is in mesh with the driven bevel gear ring.

[0011] The variable speed water pump sends the spray liquid into the driving cavity through the liquid inlet pipe, the flow of the spray liquid drives the autorotation impeller to rotate, the autorotation impeller drives the driving shaft to rotate, the driving shaft drives the driving bevel gear to rotate, the driving bevel gear drives the spray main pipe to rotate through the driven bevel gear ring, and the spray main pipe drives the spray mechanism to rotate and spray, thereby ensuring uniform spraying.

[0012] Preferably, the centrifugal self-adjusting driving mechanism comprises a fixed plate, an upper hinge rod, a lower hinge rod and a swing block, the fixed plate is symmetrically arranged at the bottom end of the spray main pipe, the bottom end of the adjusting rod is provided with an upper hinge shaft, the upper end of the upper hinge rod is rotationally connected to the upper hinge shaft, the bottom end of the fixed plate is provided with a lower hinge shaft, the middle part of the lower hinge rod is rotationally arranged on the lower hinge shaft, the bottom end of the upper hinge rod is rotationally connected to the upper end of the lower hinge rod, and the swing block is fixedly arranged at the bottom end of the lower hinge rod.

[0013] At the beginning, the device is not started, the spray main pipe remains static, the adjusting spring pushes the adjusting piston to move up, the swing block pulls the lower hinge rod and the upper hinge rod to be approximately vertical under the action of gravity, the upper hinge rod pushes the adjusting piston to move up through the upper hinge shaft and the adjusting rod, when the spray main pipe rotates, the spray main pipe drives the centrifugal self-adjusting driving mechanism to rotate synchronously, at this time, the swing block moves outward under the action of centrifugal force, gradually changes from the vertical state to the horizontal state, the swing block drives the lower hinge rod to rotate around the lower hinge shaft, the lower hinge rod pulls the upper hinge rod to move down, the upper hinge rod pulls the adjusting piston to move down along the spray main pipe through the adjusting rod, so that more layers of the spray mechanism are connected with the spray main pipe, the greater the flow of the variable speed water pump, the faster the rotating speed of the rotating impeller, and the faster the rotating speed of the spray main pipe, the greater the swing amplitude of the swing block, the more approximately horizontal the lower hinge rod and the upper hinge rod, the greater the distance of the lower hinge rod pulling the upper hinge rod to move down, the greater the distance of the adjusting piston to move down, and the more layers of the spray mechanism are connected with the spray main pipe, so that the spray level is automatically adjusted, and the exhaust gas is purified in multiple stages.

[0014] Preferably, each layer of the spray mechanism comprises a plurality of spray assemblies arranged in an array around the circumference of the spray main pipe, the spray assembly comprising a spray pipe, a transverse branch pipe, a rotating cover pipe and a nozzle, the spray pipe being connected to the side wall of the spray main pipe, the transverse branch pipe being connected to the side wall of the spray pipe, the spray pipe being arranged vertically to the spray main pipe, the spray pipe being arranged in an array around the circumference of the spray main pipe, the transverse branch pipes being arranged equidistantly along the length of the spray pipe, the transverse branch pipe and the spray pipe being arranged horizontally in the spray tower, the circumferential side wall of the transverse branch pipe being provided with an arc-shaped through hole at the bottom end, the rotating cover pipe being rotatably sleeved outside the transverse branch pipe, the arc-shaped through hole being sleeved in the rotating cover pipe, and the nozzle being fixedly penetrating through the bottom wall of the rotating cover pipe and being connected to the transverse branch pipe through the arc-shaped through hole.

[0015] Preferably, the spray main pipe is provided with a swing drive for driving the nozzle to swing reciprocally, the swing drive comprising a reciprocating linear moving assembly, a connecting rod and a plurality of push moving assemblies arranged equidistantly from top to bottom along the spray main pipe, one set of push moving assembly being arranged above each layer of the spray mechanism, two adjacent sets of push moving assemblies being connected through the connecting rod, the reciprocating linear moving assembly being arranged in a transmission cavity, the reciprocating linear moving assembly being connected to the uppermost push moving assembly, the reciprocating linear moving assembly comprising an eccentric shaft, a transmission sleeve and a push moving sliding frame, the transmission sleeve being slidably sleeved on the spray main pipe, the upper end of the transmission sleeve being slidably penetrating through the bottom wall of the transmission cavity and being arranged in the transmission cavity, the uppermost push moving assembly being connected to the lower end of the transmission sleeve, the push moving sliding frame being fixedly arranged on one side of the upper end of the transmission sleeve and being arranged in the tangential direction of the transmission sleeve, and the eccentric shaft being eccentrically arranged on the side wall of the driving bevel gear and being slidably clamped in the push moving sliding frame.

[0016] When the water power driving mechanism is driven, the driving bevel gear rotates, the driving bevel gear drives the eccentric shaft to rotate in a circle, the eccentric shaft drives the transmission sleeve to move up and down along the spray main pipe through the push moving sliding frame.

[0017] The pushing assembly includes a pushing sleeve, a sliding plate, a limiting collar, a pushing rack, and a pushing toothed ring. The pushing sleeve is slidably fitted onto the outside of the main spray pipe. Pushing plates are equidistantly arranged along the circumferential direction on the sidewall of the pushing sleeve. The pushing plates are provided with oblique pushing through holes, the upper end of which is inclined away from the main spray pipe. The limiting collar is slidably coaxially disposed on the outside of the spray pipe. The sliding plate is disposed above the limiting collar and is parallel to the spray pipe. A pushing bracket is provided on the upper wall of the sliding plate near the main spray pipe. A pushing pin is provided on the pushing bracket and is slidably embedded in the oblique pushing through hole. The pushing toothed ring is coaxially fixed to one side of the rotating cover tube. The pushing rack is disposed on the bottom wall of the sliding plate and is equidistantly distributed along the length of the sliding plate. The pushing rack meshes with the pushing toothed ring, and the pushing rack and pushing toothed ring correspond one-to-one.

[0018] When the transmission sleeve moves up and down, it drives the uppermost pushing component's pushing sleeve to move up and down synchronously. Multiple pushing components move up and down reciprocally synchronously through connecting rods. When the pushing sleeve moves down, it drives the pushing plate to move down. The oblique pushing through hole on the pushing plate pushes the slide plate away from the main spray pipe through the pushing clip shaft. The slide plate drives the limiting collar to slide away from the main spray pipe along the spray pipe axis. The slide plate drives the pushing rack to move. The pushing rack drives the pushing gear ring to rotate. The pushing gear ring drives the rotating cover to rotate around the transverse branch pipe. The rotating cover drives the nozzle to swing. Through the up and down reciprocating movement of the pushing sleeve, the nozzle swings back and forth.

[0019] Preferably, the gas quality sensor can be one or more of a particulate matter concentration sensor and a VOCs concentration sensor, which can be freely selected according to the type of waste gas.

[0020] Preferably, the end of the jet pipe away from the rotating annular cavity is provided with a converging section, the inner diameter of which gradually decreases, and the flow velocity increases when the airflow is ejected from the converging section.

[0021] Preferably, the spray tower is equipped with a filter screen, the air inlet pipe is equipped with a one-way air inlet valve, and the self-rotating cyclone mechanism is located above the filter screen.

[0022] Preferably, a circulation through hole is provided between the bottom end of the spray tower and the liquid storage chamber, and a waste discharge pipe is provided on one side of the liquid storage chamber, with a waste discharge valve provided on the waste discharge pipe.

[0023] The beneficial effects achieved by the present invention using the above structure are as follows:

[0024] 1. The self-rotating cyclone mechanism uses the kinetic energy of the exhaust gas itself to drive the rotation of the self-rotating ring cavity. The exhaust gas is sent into the self-rotating ring cavity through the air inlet pipe and is vertically sprayed out to the inner wall of the spray tower through the jet pipe. The airflow generates a reaction force on the jet pipe, which drives the self-rotating ring cavity to rotate, so that the exhaust gas is evenly distributed in the spray tower. The rotation of the jet pipe and the jet spray form a spiral airflow. The spiral upward airflow pattern can effectively extend the residence path and residence time of the exhaust gas in the tower, creating sufficient time conditions for the purification reaction.

[0025] 2. The jet pipe end is designed as a converging structure. When the airflow is ejected from the converging section, the flow velocity increases, which facilitates the rotation of the self-rotating annular cavity.

[0026] 4. A hydraulic drive mechanism is installed. When the variable speed water pump pumps the spray liquid to the main spray pipe, the water flow drives the hydraulic drive mechanism to rotate. The hydraulic drive mechanism drives the main spray pipe to rotate through the driven bevel gear ring. The main spray pipe drives the spray mechanism to rotate and spray, ensuring uniform spraying.

[0027] 5. A gas quality sensor is installed to monitor the concentration of air pollutants in real time. The control assembly adjusts the flow rate of the variable speed water pump according to the concentration of air pollutants, thereby regulating the flow rate of the spray liquid. The speed of the hydraulic drive mechanism is automatically adjusted by the change in water flow, which in turn adjusts the speed of the spray main pipe. The faster the speed of the spray main pipe, the greater the outward swing amplitude of the swing block. The closer the lower hinge rod and the upper hinge rod are to being horizontal, the greater the distance that the lower hinge rod pulls the upper hinge rod downward. The greater the distance that the adjusting piston moves downward, the more layers of the spray mechanism are connected to the spray main pipe, and the automatic adjustment of the spray layers is achieved.

[0028] 6. The main spray pipe is equipped with a swing drive that drives the nozzles to swing back and forth. When the hydraulic drive mechanism is in operation, the active bevel gear rotates, which drives the eccentric shaft to rotate circumferentially. The eccentric shaft drives the nozzles to swing back and forth through the swing drive. Combined with the circumferential rotation of the spray mechanism, the spray liquid is more evenly dispersed in the spray tower, achieving all-round spraying without dead angles and improving the mixing efficiency of the spray liquid and the exhaust gas. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a multi-stage waste gas purification device provided by the present invention;

[0030] Figure 2 A cross-sectional view of a multi-stage waste gas purification device provided by the present invention;

[0031] Figure 3 A schematic diagram of the combined structure of the air intake pipe and the self-rotating cyclone mechanism provided by the present invention;

[0032] Figure 4 A cross-sectional view of the spray tower, air inlet pipe, and self-rotating cyclone mechanism provided by the present invention;

[0033] Figure 5 A schematic diagram of the combined structure of the spray frame, hydraulic drive mechanism, spray main pipe, spray mechanism and centrifugal self-adjusting drive mechanism provided by the present invention;

[0034] Figure 6 This is a schematic diagram of the combined structure of the spray frame, hydraulic drive mechanism, spray main pipe, spray mechanism and centrifugal self-adjusting drive mechanism provided by the present invention from another perspective.

[0035] Figure 7 A cross-sectional view of the spray frame, hydraulic drive mechanism, spray main pipe, spray mechanism, and centrifugal self-adjusting drive mechanism provided by the present invention;

[0036] Figure 8 A schematic diagram of the combined structure of the self-rotating impeller, spray main pipe, driving bevel gear, and driven bevel gear ring provided by the present invention;

[0037] Figure 9 This is a schematic diagram of the combined structure of the spray pipe, spray mechanism, transmission sleeve and pushing assembly provided by the present invention;

[0038] Figure 10 for Figure 9 A magnified view of part A in the image;

[0039] Figure 11 This is a schematic diagram of the combined structure of the spray pipe and the spray assembly provided by the present invention;

[0040] Figure 12 This is a schematic diagram of the combined structure of the main spray pipe, the spray tube, and the horizontal branch pipe provided by the present invention.

[0041] The components are as follows: 1. Spray tower; 2. Inlet pipe; 3. Outlet pipe; 4. Rotating cyclone mechanism; 5. Liquid storage chamber; 6. Variable speed water pump; 7. Gas quality sensor; 8. Spray frame; 9. Hydraulic drive mechanism; 10. Spray mechanism; 11. Adjusting piston; 12. Adjusting rod; 13. Centrifugal self-adjusting drive mechanism; 14. Control assembly; 15. Push-moving cam; 16. Rotating ring cavity; 17. Jet pipe; 18. Converging section; 19. Drive base; 20. Drive shaft; 21. Rotating impeller; 22. Liquid inlet pipe; 23. Driving bevel gear; 24. Driven bevel gear ring; 25. Drive cavity; 26. Transmission cavity; 27. Fixed plate; 28. Upper hinge rod; 29. ​​Lower hinge rod. 30. Swing block; 31. Upper hinge shaft; 32. Lower hinge shaft; 33. Adjusting spring; 34. Filter screen; 35. Circulation through hole; 36. Waste discharge pipe; 37. Waste discharge valve; 38. Spray assembly; 39. Spray pipe; 40. Horizontal branch pipe; 41. Rotating cover pipe; 42. Nozzle; 43. Arc-shaped through hole; 44. Swing drive; 45. Reciprocating linear movement assembly; 46. Push assembly; 47. Connecting rod; 48. Eccentric shaft; 49. Transmission sleeve; 50. Push sliding frame; 51. Push sleeve; 52. Slide plate; 53. Limiting collar; 54. Push rack; 55. Push gear ring; 56. Push plate; 57. Angled push through hole; 58. Push bracket; 59. Main spray pipe.

[0042] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0043] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0044] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0045] Example 1, as Figures 1-12As shown, the present invention provides a multi-stage waste gas purification device, including a spray tower 1, an inlet pipe 2, and an outlet pipe 3. The inlet pipe 2 is connected to the side wall of the spray tower 1, and the outlet pipe 3 is connected to the upper end of the spray tower 1. A self-rotating cyclone mechanism 4 is rotatably connected to the end of the inlet pipe 2. A liquid storage chamber 5 is provided on one side of the spray tower 1. A variable speed water pump 6 is provided between the liquid storage chamber 5 and the spray tower 1. The input end of the variable speed water pump 6 is connected to the liquid storage chamber 5 through a pipeline. A gas quality sensor 7 is provided inside the inlet pipe 2. A spray frame 8 is provided in the upper part of the spray tower 1. A spray main pipe 59 is rotatably connected to the bottom end of the spray frame 8. A water supply for driving the spray main pipe 59 to rotate is provided on the spray frame 8. The output end of the variable speed water pump 6 is connected to the hydraulic drive mechanism 9 through a pipeline. The hydraulic drive mechanism 9 is connected to the spray main pipe 59. The spray main pipe 59 is provided with multiple spray mechanisms 10 connected to the spray main pipe 59 from top to bottom. The spray main pipe 59 is provided with a sliding seal adjustment piston 11. The lower end of the adjustment piston 11 is provided with an adjustment rod 12. The adjustment rod 12 slides downward through the bottom end of the spray main pipe 59. The bottom end of the spray main pipe 59 is provided with a centrifugal self-adjusting drive mechanism 13 that drives the adjustment piston 11 to slide along the spray main pipe 59. The centrifugal self-adjusting drive mechanism 13 is connected to the adjustment rod 12. The air inlet pipe 2 is located below the centrifugal self-adjusting drive mechanism 13.

[0046] In use, the gas quality sensor 7 can be selected and installed according to the type of exhaust gas, or multiple types can be installed at the same time. In this embodiment, exhaust gas containing VOCs concentration is used as an example, and the gas quality sensor 7 adopts a VOCs concentration sensor.

[0047] See Figures 1-4 The spray tower 1 has a control assembly 14 on its side wall. The control assembly 14 is electrically connected to the variable speed water pump 6 and the gas quality sensor 7. The control assembly 14 and the variable speed water pump 6 are existing technologies and will not be described in detail here.

[0048] The spray tower 1 is equipped with a filter screen 34, and the air inlet pipe 2 is equipped with a one-way air inlet valve. The self-rotating cyclone mechanism 4 is located above the filter screen 34. A circulation through hole 35 is provided between the bottom end of the spray tower 1 and the liquid storage chamber 5. A waste discharge pipe 36 is provided on one side of the liquid storage chamber 5, and a waste discharge valve 37 is provided on the waste discharge pipe 36.

[0049] The air inlet pipe 2 is arranged in an inverted L-shape. The rotating cyclone mechanism 4 includes a rotating annular cavity 16 and jet pipes 17 arranged in a circular array around the rotating annular cavity 16. The air inlet pipe 2 is connected to an external induced draft fan. The rotating annular cavity 16 is rotatably located at the end of the air inlet pipe 2 and is connected to the air inlet pipe 2. The jet pipes 17 are arranged in an L-shape and are connected to the side wall of the rotating annular cavity 16. The air outlet direction of the jet pipes 17 is perpendicular to the inner wall of the spray tower 1. The end of the jet pipes 17 away from the rotating annular cavity 16 is provided with a converging section 18. The inner diameter of the converging section 18 gradually decreases, and the flow velocity increases when the airflow is ejected from the converging section 18.

[0050] See Figures 2-8 The hydraulic drive mechanism 9 includes a drive base 19, a drive shaft 20, a rotating impeller 21, an inlet pipe 22, a driving bevel gear 23, and a driven bevel gear ring 24. The drive base 19 is located at the bottom of the spray frame 8. The drive base 19 has a drive chamber 25 and a transmission chamber 26. The drive shaft 20 is coaxially rotatably disposed within the drive chamber 25. The rotating impeller 21 is coaxially fixed to the drive shaft 20 and disposed within the drive chamber 25. The inlet pipe 22 is connected to the drive chamber 25. On one side of 5, the inlet pipe 22 is arranged along the tangential direction of the drive cavity 25. The output end of the variable speed water pump 6 is connected to the inlet pipe 22 through a pipeline. The spray main pipe 59 rotates through the transmission cavity 26. The driving bevel gear 23 is rotatably disposed in the transmission cavity 26. The driving bevel gear 23 is coaxially fixed to the drive shaft 20. The driven bevel gear ring 24 is coaxially fixed to the outside of the spray main pipe 59. The driven bevel gear ring 24 is disposed in the transmission cavity 26. The driving bevel gear 23 meshes with the driven bevel gear ring 24.

[0051] like Figures 2-7 As shown, the centrifugal self-adjusting drive mechanism 13 includes a fixed plate 27, an upper hinge rod 28, a lower hinge rod 29, and a swing block 30. The fixed plate 27 is symmetrically arranged at the bottom end of the spray main pipe 59. The bottom end of the adjusting rod 12 is provided with an upper hinge shaft 31. The upper end of the upper hinge rod 28 is rotatably connected to the upper hinge shaft 31. The bottom end of the fixed plate 27 is provided with a lower hinge shaft 32. The middle part of the lower hinge rod 29 is rotatably arranged on the lower hinge shaft 32. The bottom end of the upper hinge rod 28 is rotatably connected to the upper end of the lower hinge rod 29. The swing block 30 is fixedly arranged at the bottom end of the lower hinge rod 29. The adjusting piston 11 and the bottom end of the spray main pipe 59 are provided with adjusting springs 33.

[0052] In practical use, an external induced draft fan sends exhaust gas through the inlet pipe 2 into the spray tower 1. The control assembly 14 controls the gas quality sensor 7 to monitor the concentration of pollutants in the airflow in real time and generates an electrical signal to send to the control assembly 14. Based on the VOCs concentration monitored by the gas quality sensor 7, the control assembly 14 automatically adjusts the flow rate of the variable speed water pump 6. The exhaust gas is sent into the rotating annular cavity 16 through the inlet pipe 2 and vertically sprayed out through the jet pipe 17 to the inner wall of the spray tower 1. The airflow generates a reaction force on the jet pipe 17, causing the rotating annular cavity 16 to rotate, thereby making the exhaust gas evenly distributed in the spray tower 1. The rotation of the jet pipe 17 creates a spiral airflow. The spiral upward airflow pattern can effectively extend the residence path and residence time of the exhaust gas in the tower, which is beneficial for purification. Sufficient time was provided, and the variable-speed water pump 6 pumped the spray liquid to the inlet pipe 22 through the pipeline. The spray liquid was then sent tangentially into the drive chamber 25 through the inlet pipe 22. The water flow impacted the blades of the rotating impeller 21, causing the impeller 21 to rotate. The rotating impeller 21 drove the drive bevel gear 23 to rotate through the drive shaft 20. The drive bevel gear 23 drove the spray main pipe 59 to rotate through the driven bevel gear ring 24. The spray main pipe 59 drove the multi-layer spray mechanism 10 to rotate synchronously, evenly spraying the spray liquid into the spray tower 1, providing comprehensive and uniform coverage. When the spray main pipe 59 was initially stationary, the adjusting spring 33 pushed the adjusting piston 11 upward. Under the action of gravity, the swing block 30 pulled the lower hinge rod 29 and the upper hinge rod 28 to a near-vertical state. The adjusting piston 11 is pushed upward by the upper hinge shaft 31 and the adjusting rod 12. The multi-layer spray mechanism 10 above the adjusting piston 11 is connected to the spray main pipe 59, while the multi-layer spray mechanism 10 below the adjusting piston 11 is blocked by the adjusting piston 11. When the variable speed water pump 6 starts, the spray liquid is sprayed out through the spray mechanism 10 above the adjusting piston 11 to spray and purify the exhaust gas in the spray tower 1. When the variable speed water pump 6 starts, the water flow drives the hydraulic drive mechanism 9 to rotate, which in turn drives the spray main pipe 59 to rotate. The spray main pipe 59 drives the centrifugal self-adjusting drive mechanism 13 to rotate synchronously. At this time, the swing block 30 moves outward under the action of centrifugal force, gradually changing from a vertical state to a horizontal state. The swing block 30 drives the lower hinge rod 29 to rotate around the lower hinge shaft 32. Rotation causes the lower hinge 29 to pull the upper hinge 28 downwards. The upper hinge 28, through the adjusting rod 12, pulls the adjusting piston 11 downwards along the spray main pipe 59, connecting more layers of the spray mechanism 10 to the spray main pipe 59. The higher the concentration of pollutants in the airflow monitored by the gas quality sensor 7, the greater the flow rate of the variable speed water pump 6, resulting in a faster rotation speed of the self-rotating impeller 21. Consequently, the faster the rotation speed of the spray main pipe 59, the greater the outward swing amplitude of the swing block 30. The more approximately horizontal the lower hinge 29 and the upper hinge 28 are, the greater the downward distance the lower hinge 29 pulls the upper hinge 28, and the greater the downward distance the adjusting piston 11 moves. This results in more layers of the spray mechanism 10 connecting to the spray main pipe 59, performing multi-stage spray purification of the exhaust gas. The spray liquid flow rate and spray levels are automatically adjusted according to the VOCs concentration.While ensuring thorough purification of the exhaust gas, the waste of the spraying liquid is minimized. After use, the spraying liquid is filtered through filter screen 34 and discharged to the bottom of the spray tower 1, then re-enters the storage chamber 5 through circulation holes 35, thus achieving the recycling of the spraying liquid. The spraying wastewater is periodically discharged through the waste discharge pipe 36 for replacement.

[0053] Example 2 differs from Example 1 in that, see [reference] Figures 2-12 Each layer of the spray mechanism 10 includes multiple sets of spray components 38 arranged in a circumferential array around the main spray pipe 59. Each spray component 38 includes a spray pipe 39, a transverse branch pipe 40, a rotating shroud 41, and nozzles 42. The spray pipe 39 is connected to the side wall of the main spray pipe 59, and the transverse branch pipe 40 is connected to the side wall of the spray pipe 39. The spray pipe 39 is perpendicular to the main spray pipe 59 and is arranged in a circumferential array around the main spray pipe 59. The horizontal branch pipes 40 are arranged at equal intervals along the length of the spray pipes 39. The horizontal branch pipes 40 and the spray pipes 39 are horizontally arranged inside the spray tower 1. The bottom end of the circumferential side wall of the horizontal branch pipe 40 is provided with an arc-shaped through hole 43. The rotating cover pipe 41 is rotatably sleeved on the outside of the horizontal branch pipe 40. The arc-shaped through hole 43 is covered inside the rotating cover pipe 41. The nozzle 42 is fixedly inserted through the bottom wall of the rotating cover pipe 41. The nozzle 42 is connected to the horizontal branch pipe 40 through the arc-shaped through hole 43.

[0054] The spray main pipe 59 is equipped with a swing drive 44 that drives the nozzles 42 to reciprocate. The swing drive 44 includes a reciprocating line shifting assembly 45, a connecting rod 47, and multiple sets of pushing assemblies 46 arranged equidistantly from top to bottom along the spray main pipe 59. Each layer of the spray mechanism 10 has a set of pushing assemblies 46 above it, and adjacent sets of pushing assemblies 46 are connected by connecting rods 47. The reciprocating line shifting assembly 45 is located in the transmission cavity 26 and is connected to the uppermost pushing assembly 46. The reciprocating line shifting assembly 45 includes a biasing... The device comprises a spindle 48, a transmission sleeve 49, and a sliding frame 50. The transmission sleeve 49 is slidably fitted onto the main spray pipe 59. The upper end of the transmission sleeve 49 slides through the bottom wall of the transmission cavity 26 and is located within the transmission cavity 26. The uppermost sliding assembly 46 is connected to the lower end of the transmission sleeve 49. The sliding frame 50 is fixedly installed on one side of the upper end of the transmission sleeve 49 and is arranged along the tangential direction of the transmission sleeve 49. The eccentric shaft 48 is eccentrically located on the side wall of the drive bevel gear 23 and is slidably engaged within the sliding frame 50.

[0055] The pushing assembly 46 includes a pushing sleeve 51, a sliding plate 52, a limiting collar 53, a pushing rack 54, and a pushing gear ring 55. The pushing sleeve 51 is slidably sleeved on the outside of the main spray pipe 59. Pushing plates 56 are arranged equidistantly along the circumference of the sidewall of the pushing sleeve 51. The pushing plates 56 are provided with oblique pushing through holes 57. The upper end of the oblique pushing through holes 57 is inclined away from the main spray pipe 59. The limiting collar 53 is coaxially slidably disposed on the outside of the spray pipe 39. The sliding plate 52 is disposed above the limiting collar 53. The slide plate 52 is arranged parallel to the spray pipe 39. The upper wall of the slide plate 52 near the spray pipe 39 is provided with a pusher bracket 58. The pusher bracket 58 is provided with a pusher pin 15. The pusher pin 15 is slidably embedded in the oblique pusher through hole 57. The pusher toothed ring 55 is coaxially fixed to one side of the rotating cover tube 41. The pusher rack 54 is provided on the bottom wall of the slide plate 52. The pusher rack 54 is equidistantly distributed along the length of the slide plate 52. The pusher rack 54 meshes with the pusher toothed ring 55. The pusher rack 54 and the pusher toothed ring 55 correspond one-to-one.

[0056] When the variable speed water pump 6 starts, it pumps the spray liquid to the inlet pipe 22 through the pipeline. The spray liquid is then sent tangentially into the drive chamber 25 through the inlet pipe 22. The water flow impacts the blades of the rotating impeller 21, causing the impeller 21 to rotate. The rotating impeller 21 drives the drive bevel gear 23 to rotate through the drive shaft 20. The drive bevel gear 23, in turn, drives the spray main pipe 59 to rotate through the driven bevel gear ring 24. The spray main pipe 59 drives the multi-layer spray mechanism 10 to rotate synchronously, evenly spraying the spray liquid into the spray tower 1. At the same time, the drive bevel gear 23 drives the eccentric shaft 48 to rotate circumferentially. The eccentric shaft 48, through the pusher slide frame 50, drives the transmission sleeve 49 to move up and down along the spray main pipe 59. When the transmission sleeve 49 moves up and down, it drives the pusher sleeve 51 of the uppermost pusher assembly 46 to move up and down synchronously. Multiple pusher assemblies 46 are connected through... Rod 47 moves up and down synchronously. When the push sleeve 51 moves down, it drives the push plate 56 to move down. The oblique push through hole 57 on the push plate 56 pushes the slide plate 52 away from the spray main pipe 59 through the push clamp 15. The slide plate 52 drives the limiting collar 53 to slide away from the spray main pipe 59 along the axial direction of the spray pipe 39. The slide plate 52 drives the push rack 54 to move. The push rack 54 drives the push gear ring 55 to rotate. The push gear ring 55 drives the rotating cover 41 to rotate around the horizontal branch pipe 40. The rotating cover 41 drives the nozzle 42 to swing. Through the up and down reciprocating movement of the push sleeve 51, the nozzle 42 swings back and forth around the horizontal branch pipe 40. Through the circumferential rotation of the spray mechanism 10, in conjunction with the reciprocating swing of the nozzle 42 around the horizontal branch pipe 40, the spray liquid is more evenly dispersed in the spray tower 1, realizing all-round spraying without dead angles and improving the mixing efficiency of the spray liquid and the exhaust gas.

[0057] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0058] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A multi-stage exhaust gas purification device, comprising a spray tower, an air inlet pipe and an air outlet pipe, the air inlet pipe being connected through a side wall of the spray tower, and the air outlet pipe being connected through an upper end of the spray tower, characterized in that: The end of the air inlet pipe is rotationally connected with a self-rotation cyclone mechanism, one side of the spray tower is provided with a liquid storage cavity, a variable speed water pump is arranged between the liquid storage cavity and the spray tower, the input end of the variable speed water pump is communicated with the liquid storage cavity through a pipeline, a gas mass sensor is arranged in the air inlet pipe, a spray frame is arranged in the upper part of the spray tower, the bottom end of the spray frame is rotationally connected with a spray main pipe, a hydraulic drive mechanism for driving the rotation of the spray main pipe is arranged on the spray frame, the output end of the variable speed water pump is communicated with the hydraulic drive mechanism through a pipeline, the hydraulic drive mechanism is communicated with the spray main pipe, the spray main pipe is provided with a plurality of layers of spray mechanisms from top to bottom, the spray mechanisms are respectively communicated with the spray main pipe, an adjusting piston is arranged in the spray main pipe in a sliding sealing manner, the lower end of the adjusting piston is provided with an adjusting rod, the adjusting rod is slid downward and penetrates through the bottom end of the spray main pipe, the bottom end of the spray main pipe is provided with a centrifugal self-adjusting drive mechanism for driving the adjusting piston to slide along the spray main pipe, the centrifugal self-adjusting drive mechanism is connected with the adjusting rod, and the air inlet pipe is arranged below the centrifugal self-adjusting drive mechanism; the side wall of the spray tower is provided with a control assembly, and the control assembly is electrically connected with the variable speed water pump and the gas mass sensor respectively. The air inlet pipe is arranged in an inverted L shape, the self-rotation cyclone mechanism comprises a self-rotation ring cavity and a plurality of jet pipes which are arranged in an array around the circumference of the self-rotation ring cavity, the self-rotation ring cavity is rotationally arranged at the end of the air inlet pipe, and the self-rotation ring cavity is communicated with the air inlet pipe, the jet pipes are arranged in an L shape, the jet pipes are communicated and arranged on the side wall of the self-rotation ring cavity, and the gas outlet direction of the jet pipes is perpendicular to the inner wall of the spray tower. The hydraulic drive mechanism comprises a driving seat, a driving shaft, a self-rotation impeller, a liquid inlet pipe, a driving bevel gear and a driven bevel gear ring, the driving seat is arranged at the bottom of the spray frame, the driving seat is provided with a driving cavity and a transmission cavity, the driving shaft is coaxially rotationally arranged in the driving cavity, the self-rotation impeller is coaxially fixedly connected on the driving shaft, and the self-rotation impeller is arranged in the driving cavity, the liquid inlet pipe is communicated and arranged on one side of the driving cavity, and the liquid inlet pipe is arranged in the tangential direction of the driving cavity, the output end of the variable speed water pump is communicated with the liquid inlet pipe through a pipeline, the spray main pipe rotationally penetrates through the transmission cavity, the driving bevel gear is rotationally arranged in the transmission cavity, the driving bevel gear is coaxially fixedly connected with the driving shaft, and the driven bevel gear ring is coaxially fixedly arranged outside the spray main pipe, the driven bevel gear ring is arranged in the transmission cavity, and the driving bevel gear is meshed with the driven bevel gear ring. The centrifugal self-adjusting drive mechanism comprises a fixed plate, an upper hinge rod, a lower hinge rod and a swing block, the fixed plate is symmetrically arranged at the bottom end of the spray main pipe, the bottom end of the adjusting rod is provided with an upper hinge shaft, the upper end of the upper hinge rod is rotationally connected with the upper hinge shaft, the bottom end of the fixed plate is provided with a lower hinge shaft, the middle part of the lower hinge rod is rotationally arranged on the lower hinge shaft, the bottom end of the upper hinge rod is rotationally connected with the upper end of the lower hinge rod, and the swing block is fixedly arranged at the bottom end of the lower hinge rod, and the bottom end of the spray main pipe is provided with an adjusting spring.

2. A multi-stage exhaust purification device according to claim 1, characterized by: Each layer of the spray mechanism comprises a plurality of spray assemblies arranged in an array around the circumference of the spray main pipe, the spray assembly comprising a spray pipe, a lateral branch pipe, a rotating cover pipe and a nozzle, the spray pipe being arranged in communication with the side wall of the spray main pipe, the lateral branch pipe being arranged in communication with the side wall of the spray pipe, the spray pipe being arranged perpendicularly to the spray main pipe, the spray pipe being arranged in an array around the circumference of the spray main pipe, the lateral branch pipes being arranged equidistantly along the length direction of the spray pipe, the lateral branch pipe and the spray pipe being arranged horizontally in the spray tower, the lateral branch pipe being provided with an arc-shaped through hole at the bottom end of the circumferential side wall, the rotating cover pipe being rotatably sleeved outside the lateral branch pipe, the arc-shaped through hole being sleeved in the rotating cover pipe, the nozzle being fixedly penetrated through the bottom wall of the rotating cover pipe, the nozzle being in communication with the lateral branch pipe through the arc-shaped through hole.

3. A multi-stage exhaust gas purification device according to claim 2, characterized by: The spray main pipe is provided with a swing drive for driving the nozzle to swing reciprocally, the swing drive comprising a reciprocating wire moving assembly, a connecting rod and a plurality of push moving assemblies arranged equidistantly along the spray main pipe from top to bottom, one group of push moving assemblies being arranged above each layer of the spray mechanism, the adjacent two groups of push moving assemblies being connected through the connecting rod, the reciprocating wire moving assembly being arranged in a transmission cavity, the reciprocating wire moving assembly being connected with the uppermost push moving assembly, the reciprocating wire moving assembly comprising an eccentric shaft, a transmission sleeve and a push moving sliding frame, the transmission sleeve being slidably sleeved on the spray main pipe, the upper end of the transmission sleeve being slidably penetrated through the bottom wall of the transmission cavity and arranged in the transmission cavity, the uppermost push moving assembly being connected with the lower end of the transmission sleeve, the push moving sliding frame being fixedly arranged on one side of the upper end of the transmission sleeve, the push moving sliding frame being arranged in the tangential direction of the transmission sleeve, the eccentric shaft being eccentrically arranged in the side wall of the driving bevel gear, the eccentric shaft being slidably clamped in the push moving sliding frame.

4. A multi-stage exhaust gas purification device according to claim 3, characterized by: The push moving assembly comprises a push moving sleeve, a sliding plate, a limiting sleeve ring, a push moving rack and a push moving gear ring, the push moving sleeve being slidably sleeved outside the spray main pipe, the side wall of the push moving sleeve being equidistantly arranged with push moving plates in the circumferential direction, the push moving plates being provided with inclined push moving through holes, the upper end of the inclined push moving through hole being inclined away from the spray main pipe, the limiting sleeve ring being coaxially and slidably arranged outside the spray pipe, the sliding plate being arranged above the limiting sleeve ring, the sliding plate being arranged in parallel with the spray pipe, the upper wall of the end of the sliding plate close to the spray main pipe being provided with a push moving support, the push moving support being provided with a push moving clamping shaft, the push moving clamping shaft being slidably embedded in the inclined push moving through hole, the push moving gear ring being coaxially and fixedly arranged on one side of the rotating cover pipe, the push moving rack being arranged on the bottom wall of the sliding plate, the push moving rack being equidistantly arranged along the length direction of the sliding plate, the push moving rack being engaged with the push moving gear ring, the push moving rack and the push moving gear ring being in one-to-one correspondence.

5. A multi-stage exhaust gas purification device according to claim 4, characterized by: The end of the air injection pipe away from the rotation ring cavity is provided with a converging section, the inner diameter of the converging section gradually decreasing.

6. A multi-stage exhaust gas purification device according to claim 5, characterized by: The spray tower is provided with a filter screen, the air injection pipe is provided with a one-way air inlet valve, the self-rotating cyclone mechanism is arranged above the filter screen, the bottom end of the spray tower and the liquid storage cavity are in communication through a circulating through hole, one side of the liquid storage cavity is in communication with a waste discharge pipe, the waste discharge pipe is provided with a waste discharge valve.

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