Multi-stage waste gas purification device

Abstract

The invention discloses a multi-stage waste gas purification device, and belongs to the technical field of waste gas purification, the multi-stage waste gas purification device comprises a spray tower, a gas inlet pipe and a gas outlet pipe, 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, a gas quality sensor is arranged in the gas inlet pipe, and a gas outlet pipe is arranged in the gas outlet pipe. The bottom end of the spraying frame is rotationally connected with a spraying main pipe, a hydraulic driving 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 driving mechanism, and the spraying main pipe is provided with multiple layers of spraying mechanisms communicated with the spraying main pipe from top to bottom; an adjusting piston is arranged in the spraying main pipe in a sliding and sealing manner, and a centrifugal self-adjusting driving 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 multi-stage waste gas purification device provided by the invention can be used for monitoring the concentration of air pollutants and is provided with a plurality of layers of spraying mechanisms, and the spraying liquid flow and the spraying layers are automatically adjusted according to the concentration of the 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 rotation speed of the self-rotating impeller, and the faster the rotation 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 moving 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 arranged outside the transverse branch pipe, the arc-shaped through hole being arranged in the rotating cover pipe, and the nozzle being fixedly arranged through the bottom wall of the rotating cover pipe and 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 movement assembly, a connecting rod and a plurality of push movement assemblies arranged equidistantly from top to bottom along the spray main pipe, one set of push movement assembly being arranged above each layer of the spray mechanism, two adjacent sets of push movement assemblies being connected through the connecting rod, the reciprocating linear movement assembly being arranged in a transmission cavity, the reciprocating linear movement assembly being connected to the uppermost push movement assembly, the reciprocating linear movement assembly comprising an eccentric shaft, a transmission sleeve and a push sliding frame, the transmission sleeve being slidably arranged on the spray main pipe, the upper end of the transmission sleeve being slidably arranged through the bottom wall of the transmission cavity and arranged in the transmission cavity, the uppermost push movement assembly being connected to the lower end of the transmission sleeve, the push sliding frame being fixedly arranged on one side of the upper end of the transmission sleeve, the push sliding frame being arranged in the tangential direction of the transmission sleeve, the eccentric shaft being eccentrically arranged on the side wall of the driving bevel gear, and the eccentric shaft being slidably arranged in the push sliding frame.

[0016] When the water-driven 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 sliding frame.

[0017] 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 is slidably arranged outside the spray main pipe, the side wall of the push-moving sleeve is equidistantly arranged with push-moving plates in the circumferential direction, the push-moving plates are provided with inclined push-moving through holes, the upper end of the inclined push-moving through hole is inclined away from the spray main pipe, the limiting sleeve ring is coaxially arranged outside the spray pipe, the sliding plate is arranged above the limiting sleeve ring, the sliding plate is arranged in parallel with the spray pipe, the upper wall of the end of the sliding plate close to the spray main pipe is provided with a push-moving support, the push-moving support is provided with a push-moving clamping shaft, the push-moving clamping shaft is slidably embedded in the inclined push-moving through hole, the push-moving gear ring is coaxially and fixedly connected to one side of the rotating cover pipe, the push-moving rack is arranged on the bottom wall of the sliding plate, the push-moving rack is equidistantly distributed along the length direction of the sliding plate, the push-moving rack is engaged with the push-moving gear ring, and the push-moving rack and the push-moving gear ring are in one-to-one correspondence.

[0018] When the transmission sleeve moves up and down, the uppermost push-moving assembly is driven to move up and down synchronously, and a plurality of push-moving assemblies are driven to move up and down synchronously through the connecting rod, the push-moving sleeve drives the push-moving plate to move down, the inclined push-moving through hole on the push-moving plate drives the sliding plate to move away from the spray main pipe through the push-moving clamping shaft, the sliding plate drives the limiting sleeve ring to slide away from the spray main pipe along the axial direction of the spray pipe, the sliding plate drives the push-moving rack to move, the push-moving rack drives the push-moving gear ring to rotate, the push-moving gear ring drives the rotating cover pipe to rotate around the transverse branch pipe, the rotating cover pipe drives the nozzle to swing, and the nozzle is driven to swing back and forth through the up-and-down reciprocating movement of the push-moving sleeve.

[0019] Preferably, the gas quality sensor can adopt 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 air injection pipe away from the rotation ring cavity is provided with a converging section, the inner diameter of the converging section gradually decreases, and the flow rate of the airflow increases when the airflow is injected from the converging section.

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

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

[0023] The beneficial effects achieved by the application with the above structure are as follows: 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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

[0028] Figure 1 This is a schematic diagram of the structure of a multi-stage waste gas purification device provided by the present invention; Figure 2 A cross-sectional view of a multi-stage waste gas purification device provided by the present invention; 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; Figure 4 A cross-sectional view of the spray tower, air inlet pipe, and self-rotating cyclone mechanism provided by the present invention; Figure 5A 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; 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. 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; 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; 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; Figure 10 for Figure 9 A magnified view of part A in the image; Figure 11 This is a schematic diagram of the combined structure of the spray pipe and the spray assembly provided by the present invention; 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.

[0029] 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.

[0030] 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

[0031] 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.

[0032] 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.

[0033] Example 1, as Figures 1-12 As 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.

[0034] In use, the gas mass sensor 7 can be selectively installed according to the type of exhaust gas, or multiple types can be installed simultaneously. In this embodiment, the gas mass sensor 7 is a VOCs concentration sensor, taking the exhaust gas containing VOCs as an example.

[0035] Referring to Figures 1-4 , the side wall of the spray tower 1 is provided with a control assembly 14, which is electrically connected with the variable speed water pump 6 and the gas mass sensor 7. The control assembly 14 and the variable speed water pump 6 are prior art, which will not be described here.

[0036] The spray tower 1 is provided with a filter screen 34, the air inlet pipe 2 is provided with a one-way air inlet valve, and the self-rotating cyclone mechanism 4 is arranged above the filter screen 34. The bottom end of the spray tower 1 and the liquid storage cavity 5 are connected and communicated through a circulation hole 35, one side of the liquid storage cavity 5 is connected and communicated with a waste discharge pipe 36, and the waste discharge pipe 36 is provided with a waste discharge valve 37.

[0037] The air inlet pipe 2 is arranged in an inverted L shape, the self-rotating cyclone mechanism 4 includes a self-rotating ring cavity 16 and air injection pipes 17 arranged in an array around the circumference of the self-rotating ring cavity 16. The air inlet pipe 2 is connected and communicated with an external air blower, the self-rotating ring cavity 16 is rotatably arranged at the end of the air inlet pipe 2, and the self-rotating ring cavity 16 is connected and communicated with the air inlet pipe 2. The air injection pipes 17 are arranged in an L shape, and the air injection pipes 17 are connected and arranged on the side wall of the self-rotating ring cavity 16. The air injection direction of the air injection pipes 17 is perpendicular to the inner wall of the spray tower 1. One end of the air injection pipe 17 away from the self-rotating ring cavity 16 is provided with a converging section 18. The inner diameter of the converging section 18 gradually decreases, and the flow rate of the airflow increases when the airflow is injected from the converging section 18.

[0038] Referring to Figures 2-8 , the water-driven mechanism 9 includes a driving seat 19, a driving shaft 20, a self-rotating impeller 21, a liquid inlet pipe 22, a driving bevel gear 23, and a driven bevel gear ring 24. The driving seat 19 is arranged at the bottom of the spray frame 8. The driving seat 19 is provided with a driving cavity 25 and a transmission cavity 26. The driving shaft 20 is coaxially and rotatably arranged in the driving cavity 25. The self-rotating impeller 21 is coaxially and fixedly connected to the driving shaft 20 and arranged in the driving cavity 25. The liquid inlet pipe 22 is connected and arranged on one side of the driving cavity 25 and arranged along the tangent direction of the driving cavity 25. The output end of the variable speed water pump 6 is connected and communicated with the liquid inlet pipe 22 through a pipeline. The spray main pipe 59 penetrates the transmission cavity 26. The driving bevel gear 23 is rotatably arranged in the transmission cavity 26 and coaxially and fixedly connected with the driving shaft 20. The driven bevel gear ring 24 is coaxially and fixedly connected to the outside of the spray main pipe 59 and arranged in the transmission cavity 26. The driving bevel gear 23 is engaged with the driven bevel gear ring 24.

[0039] As Figures 2-7As shown, the centrifugal self-adjusting driving mechanism 13 comprises 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 with 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 with 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 an adjusting spring 33.

[0040] In specific use, the external fan sends the exhaust gas into the spray tower 1 through the inlet pipe 2, the control assembly 14 controls the gas quality sensor 7 to monitor the concentration of pollutants in the gas flow in real time and generates an electric signal sent to the control assembly 14, the control assembly 14 automatically adjusts the flow of the variable speed water pump 6 according to the concentration of VOCs monitored by the gas quality sensor 7, the exhaust gas is sent into the self-rotation ring cavity 16 through the inlet pipe 2 and is sprayed vertically into the inner wall of the spray tower 1 through the air injection pipe 17, the airflow generates a reaction force on the air injection pipe 17 to drive the self-rotation ring cavity 16 to rotate, so that the exhaust gas is uniformly distributed in the spray tower 1, the rotation of the air injection pipe 17 forms 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, the variable speed water pump 6 pumps the spray liquid to the liquid inlet pipe 22 through the pipeline, the spray liquid is sent into the driving cavity 25 along the tangent direction through the liquid inlet pipe 22, the water flow impacts the blades of the self-rotation impeller 21 to make the self-rotation impeller 21 rotate, the self-rotation impeller 21 drives the driving shaft 20 to rotate, the driving shaft 20 drives the driving bevel gear 23 to rotate through the self-rotation impeller 21, the driving bevel gear 23 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, and the spray liquid is uniformly sprayed in the spray tower 1 to be uniformly covered in all directions, when the spray main pipe 59 is initially stationary, the adjusting spring 33 pushes the adjusting piston 11 to move upward, the swing block 30 pulls the lower hinge rod 29 and the upper hinge rod 28 to be approximately vertical under the action of gravity, the upper hinge rod 28 pushes the adjusting piston 11 to move upward through the upper hinge shaft 31 and the adjusting rod 12, the multi-layer spray mechanism 10 above the adjusting piston 11 is communicated with the spray main pipe 59, and 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 is started, the spray liquid is sprayed out through the spray mechanism 10 above the adjusting piston 11 to perform spray purification treatment on the exhaust gas in the spray tower 1, and when the variable speed water pump 6 is started, the water flow drives the water-driven mechanism 9 to rotate, the water-driven mechanism 9 drives the spray main pipe 59 to rotate, and the spray main pipe 59 drives the centrifugal self-adjusting driving mechanism 13 to rotate synchronously, at this time, the swing block 30 moves outward under the action of centrifugal force and gradually changes from the vertical state to the horizontal state, the swing block 30 drives the lower hinge rod 29 to rotate around the lower hinge shaft 32, the lower hinge rod 29 pulls the upper hinge rod 28 to move downward, the upper hinge rod 28 pulls the adjusting piston 11 to move downward along the spray main pipe 59 through the adjusting rod 12, so that more layers of the spray mechanism 10 are communicated with the spray main pipe 59, the higher the concentration of pollutants in the gas flow monitored by the gas quality sensor 7, the greater the flow of the variable speed water pump 6, and the faster the rotation speed of the self-rotation impeller 21, so that the rotation speed of the spray main pipe 59 is faster, the swing block 30 swings outward to a larger extent, the lower hinge rod 29 and the upper hinge rod 28 are more approximately horizontal, the lower hinge rod 29 pulls the upper hinge rod 28 to move downward to a greater distance, the adjusting piston 11 moves downward to a greater distance, and more layers of the spray mechanism 10 are communicated with the spray main pipe 59 to perform multi-stage spray purification on the exhaust gas, the spray liquid flow and the spray level are automatically adjusted according to the concentration of VOCs,The waste liquid is filtered by the filter screen 34 after use, and is discharged to the bottom end of the spray tower 1, and is re-entered into the liquid storage cavity 5 through the circulation through hole 35, so that the spray liquid is recycled, and the spray waste water is discharged through the waste discharge pipe 36 for replacement.

[0041] In the second embodiment, the difference from the first embodiment is that Figures 2-12 The spray mechanism 10 of each layer comprises a plurality of spray assemblies 38 arranged in an array around the circumference of the spray main pipe 59, the spray assembly 38 comprising a spray pipe 39, a lateral branch pipe 40, a rotating cover pipe 41 and a nozzle 42, the spray pipe 39 being arranged in communication with the side wall of the spray main pipe 59, the lateral branch pipe 40 being arranged in communication with the side wall of the spray pipe 39, the spray pipe 39 being arranged vertically with the spray main pipe 59, the spray pipe 39 being arranged in an array around the circumference of the spray main pipe 59, the lateral branch pipes 40 being arranged equidistantly along the length direction of the spray pipe 39, the lateral branch pipe 40 and the spray pipe 39 being arranged horizontally in the spray tower 1, the circumferential side wall of the lateral branch pipe 40 being provided with an arc-shaped through hole 43 at the bottom end, the rotating cover pipe 41 being arranged rotatably outside the lateral branch pipe 40, the arc-shaped through hole 43 being arranged in the rotating cover pipe 41, and the nozzle 42 being arranged fixedly through the bottom wall of the rotating cover pipe 41 and in communication with the lateral branch pipe 40 through the arc-shaped through hole 43.

[0042] The spray main pipe 59 is provided with a swing drive 44 for driving the nozzle 42 to swing back and forth, the swing drive 44 comprising a reciprocating wire moving assembly 45, a connecting rod 47 and a plurality of push moving assemblies 46 arranged equidistantly from top to bottom along the spray main pipe 59, one set of push moving assembly 46 being arranged above each layer of spray mechanism 10, the two adjacent push moving assemblies 46 being connected through the connecting rod 47, the reciprocating wire moving assembly 45 being arranged in the transmission cavity 26, the reciprocating wire moving assembly 45 being connected with the uppermost push moving assembly 46, the reciprocating wire moving assembly 45 comprising an eccentric shaft 48, a transmission sleeve 49 and a push sliding frame 50, the transmission sleeve 49 being arranged slidingly on the spray main pipe 59, the upper end of the transmission sleeve 49 slidingly penetrating the bottom wall of the transmission cavity 26 and being arranged in the transmission cavity 26, the lower end of the transmission sleeve 49 being connected with the uppermost push moving assembly 46, the push sliding frame 50 being arranged fixedly on one side of the upper end of the transmission sleeve 49, the push sliding frame 50 being arranged in the tangential direction of the transmission sleeve 49, and the eccentric shaft 48 being arranged eccentrically on the side wall of the driving bevel gear 23, the eccentric shaft 48 being arranged slidingly in the push sliding frame 50.

[0043] The push assembly 46 comprises a push sleeve 51, a sliding plate 52, a limiting sleeve ring 53, a push rack 54 and a push ring 55, the push sleeve 51 is sleeved on the outside of the spray main pipe 59, the side wall of the push sleeve 51 is arranged with push plates 56 equidistantly in the circumferential direction, the push plates 56 are provided with inclined push through holes 57, the upper end of the inclined push through hole 57 is inclined away from the spray main pipe 59, the limiting sleeve ring 53 is coaxially and slidably arranged on the outside of the spray pipe 39, the sliding plate 52 is arranged above the limiting sleeve ring 53, the sliding plate 52 is arranged in parallel with the spray pipe 39, the upper wall of the end of the sliding plate 52 close to the spray main pipe 59 is provided with a push bracket 58, the push bracket 58 is provided with a push shaft 15, the push shaft 15 is slidably embedded in the inclined push through hole 57, the push ring 55 is coaxially and fixedly connected to one side of the rotating cover pipe 41, the push rack 54 is arranged on the bottom wall of the sliding plate 52, the push rack 54 is equidistantly distributed along the length direction of the sliding plate 52, the push rack 54 is engaged with the push ring 55, and the push rack 54 and the push ring 55 are one-to-one corresponding.

[0044] When the variable speed water pump 6 is started, the variable speed water pump 6 pumps the spray liquid to the liquid inlet pipe 22 through the pipeline, the spray liquid is sent into the driving cavity 25 along the tangent direction through the liquid inlet pipe 22, the water flow impacts the blades of the self-rotating impeller 21, so that the self-rotating impeller 21 rotates, the self-rotating impeller 21 drives the driving shaft 20 to rotate, the driving shaft 20 drives the driving bevel gear 23 to rotate, the driving bevel gear 23 drives the spray main pipe 59 to rotate through the driven bevel ring 24, the spray main pipe 59 drives the multi-layer spray mechanism 10 to rotate synchronously, and the spray liquid is uniformly sprayed in the spray tower 1, at the same time, the driving bevel gear 23 drives the eccentric shaft 48 to rotate circumferentially, the eccentric shaft 48 drives the transmission sleeve pipe 49 to move up and down along the spray main pipe 59 through the push sliding frame 50, when the transmission sleeve pipe 49 moves up and down, the push sleeve 51 of the uppermost push assembly 46 moves up and down synchronously, a plurality of push assemblies 46 move up and down synchronously through the connecting rod 47, when the push sleeve 51 moves down, the push plate 56 moves down, the inclined push through hole 57 on the push plate 56 pushes the sliding plate 52 to move away from the spray main pipe 59 through the push shaft 15, the sliding plate 52 drives the limiting sleeve ring 53 to slide away from the spray main pipe 59 along the axial direction of the spray pipe 39, the sliding plate 52 drives the push rack 54 to move, the push rack 54 drives the push ring 55 to rotate, the push ring 55 drives the rotating cover pipe 41 to rotate around the transverse branch pipe 40, the rotating cover pipe 41 drives the nozzle 42 to swing, through the up-and-down reciprocating movement of the push sleeve 51, the nozzle 42 swings reciprocally around the transverse branch pipe 40, through the circumferential rotation of the spray mechanism 10, the nozzle 42 swings reciprocally around the transverse branch pipe 40, so that the spray liquid is more uniformly dispersed in the spray tower 1, full-range no-dead-angle spraying is realized, and the mixing efficiency of the spray liquid and the waste gas is improved.

[0045] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; thus the use of any

[0046] The above description of the application and its embodiments is not restrictive, and the embodiments shown in the drawings are only one of the embodiments of the application, and the actual structure is not limited thereto. In general, if a person skilled in the art is inspired by it, without departing from the purpose of the application, without creative design, similar structure and embodiments of the technical solution can be designed, which should belong to the protection scope of the application.

Claims

1. A multi-stage waste gas purification device, comprising a spray tower, an inlet pipe, and an outlet pipe, wherein the inlet pipe is connected through a side wall of the spray tower, and the outlet pipe is connected through a top end of the spray tower, characterized in that: The air inlet pipe is rotatably connected to a self-rotating cyclone mechanism. A liquid storage chamber is provided on one side of the spray tower. A variable speed water pump is provided between the liquid storage chamber and the spray tower. The input end of the variable speed water pump is connected to the liquid storage chamber through a pipeline. A gas quality sensor is provided inside the air inlet pipe. A spray frame is provided in the upper part of the spray tower. A spray main pipe is rotatably connected to the bottom end of the spray frame. A hydraulic drive mechanism is provided on the spray frame to drive the spray main pipe to rotate. The output end of the variable speed water pump is connected to the hydraulic drive mechanism through a pipeline. The hydraulic drive mechanism is connected to the spray main pipe. The spray main pipe has multiple spray mechanisms from top to bottom, each connected to the spray main pipe. An adjusting piston is slidably sealed inside the spray main pipe. An adjusting rod is provided at the lower end of the adjusting piston. The adjusting rod slides downward through the bottom end of the spray main pipe. A centrifugal self-adjusting drive mechanism is provided at the bottom end of the spray main pipe to drive the adjusting piston to slide along the spray main pipe. The centrifugal self-adjusting drive mechanism is connected to the adjusting rod. The air inlet pipe is located below the centrifugal self-adjusting drive mechanism.

2. The multi-stage waste gas purification device according to claim 1, characterized in that: The spray tower is equipped with a control assembly on its side wall, which is electrically connected to a variable speed water pump and a gas quality sensor.

3. The multi-stage waste gas purification device according to claim 2, characterized in that: The air inlet pipe is arranged in an inverted L-shape. The self-rotating cyclone mechanism includes a self-rotating annular cavity and jet pipes arranged in a circular array around the self-rotating annular cavity. The self-rotating annular cavity is rotatably located at the end of the air inlet pipe and is connected to the air inlet pipe. The jet pipes are arranged in an L-shape and are connected to the side wall of the self-rotating annular cavity. The air outlet direction of the jet pipes is perpendicular to the inner wall of the spray tower.

4. The multi-stage waste gas purification device according to claim 3, characterized in that: The hydraulic drive mechanism includes a drive base, a drive shaft, a rotating impeller, an inlet pipe, a driving bevel gear, and a driven bevel gear ring. The drive base is located at the bottom of the spray frame and has a drive chamber and a transmission chamber. The drive shaft is coaxially rotatable within the drive chamber. The rotating impeller is coaxially fixed to the drive shaft and located within the drive chamber. The inlet pipe is connected to one side of the drive chamber and is arranged along the tangent of the drive chamber. The output end of the variable speed water pump is connected to the inlet pipe through a pipeline. The main spray pipe rotatably passes through the transmission chamber. The driving bevel gear is rotatably located within the transmission chamber and is coaxially fixed to the drive shaft. The driven bevel gear ring is coaxially fixed to the outside of the main spray pipe and located within the transmission chamber. The driving bevel gear meshes with the driven bevel gear ring.

5. The multi-stage waste gas purification device according to claim 4, characterized in that: The centrifugal self-adjusting drive mechanism includes 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 main spray pipe. The bottom end of the adjusting rod is provided with an upper hinge shaft. The upper end of the upper hinge rod is rotatably 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 rotatably mounted on the lower hinge shaft. The bottom end of the upper hinge rod is rotatably connected to the upper end of the lower hinge rod. The swing block is fixedly arranged at the bottom end of the lower hinge rod. The adjusting piston and the bottom end of the main spray pipe are provided with adjusting springs.

6. The multi-stage waste gas purification device according to claim 5, characterized in that: Each layer of the spraying mechanism includes multiple sets of spraying components arranged in a circumferential array around the main spraying pipe. Each spraying component includes a spraying pipe, a transverse branch pipe, a rotating hood, and nozzles. The spraying pipe is connected to the side wall of the main spraying pipe, and the transverse branch pipe is connected to the side wall of the spraying pipe. The spraying pipe is perpendicular to the main spraying pipe and is arranged in a circumferential array around the main spraying pipe. The transverse branch pipes are arranged at equal intervals along the length of the spraying pipe. The transverse branch pipes and the spraying pipe are horizontally arranged inside the spraying tower. The bottom end of the circumferential side wall of the transverse branch pipe is provided with an arc-shaped through hole. The rotating hood is rotatably sleeved on the outside of the transverse branch pipe, and the arc-shaped through hole is covered inside the rotating hood. The nozzles are fixedly inserted through the bottom wall of the rotating hood and are connected to the transverse branch pipe through the arc-shaped through hole.

7. The multi-stage waste gas purification device according to claim 6, characterized in that: The main spray pipe is equipped with a swing drive that drives the nozzles to swing back and forth. The swing drive includes a reciprocating linear movement assembly, a connecting rod, and multiple sets of pushing assemblies arranged equidistantly from top to bottom along the main spray pipe. Each layer of the spray mechanism has a set of pushing assemblies above it. Adjacent sets of pushing assemblies are connected by a connecting rod. The reciprocating linear movement assembly is located in the transmission cavity and is connected to the uppermost pushing assembly. The reciprocating linear movement assembly includes an eccentric shaft, a transmission sleeve, and a pushing slide frame. The transmission sleeve is slidably sleeved on the main spray pipe. The upper end of the transmission sleeve slides through the bottom wall of the transmission cavity and is located in the transmission cavity. The uppermost pushing assembly is connected to the lower end of the transmission sleeve. The pushing slide frame is fixedly located on one side of the upper end of the transmission sleeve and is arranged along the tangential direction of the transmission sleeve. The eccentric shaft is eccentrically located on the side wall of the driving bevel gear and is slidably locked in the pushing slide frame.

8. The multi-stage waste gas purification device according to claim 7, characterized in that: 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 end 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.

9. A multi-stage waste gas purification device according to claim 8, characterized in that: The jet pipe has a converging section at the end away from the rotating annular cavity, and the inner diameter of the converging section gradually decreases.

10. A multi-stage waste gas purification device according to claim 9, characterized in that: The spray tower is equipped with a filter screen, the air inlet pipe is equipped with a one-way air inlet valve, the self-rotating cyclone mechanism is located above the filter screen, the bottom end of the spray tower and the liquid storage chamber are connected by a circulation through hole, the liquid storage chamber is connected to a waste discharge pipe on one side, and the waste discharge pipe is equipped with a waste discharge valve.

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