Oil fume purification equipment with cylindrical electrostatic electric field self-cleaning and drying function

Abstract

This invention discloses an oil fume purification device with self-cleaning and drying functions using a cylindrical electrostatic field. The device includes a housing, a rotating mechanism, a cylindrical electrostatic field, a cleaning device, a first steam pipe, a drain pipe, and several second steam pipes. The housing has an air inlet and an air outlet. Two rotating mechanisms are respectively located at the air inlet and outlet, and each rotating mechanism has a fan blade at its output end, the fan blade including a wind-distributing plate and a sealing plate. The cleaning device includes a translation mechanism, a swing mechanism, and a spray frame. The spray frame includes several spray pipes, each spray pipe having a first nozzle. Each spray pipe is connected to a first main pipe, which is connected in parallel to a water inlet pipe and an air inlet pipe. The oil fume purification device with self-cleaning and drying functions using a cylindrical electrostatic field provided by this invention significantly improves cleaning efficiency and shortens cleaning and drying time, thus reducing equipment downtime, through the synergistic effect of steam pyrolysis, dynamic rinsing, steam drying, and air sweeping evaporation.

Description

Technical Field

[0001] This invention relates to the field of oil fume purification equipment, and in particular to oil fume purification equipment with a cylindrical electrostatic field self-cleaning and drying function. Background Technology

[0002] In the field of oil fume purification, cylindrical electrostatic precipitators are widely used due to their highly efficient particulate matter capture capabilities. These precipitators typically consist of multiple coaxially arranged anode cylinders and cathode needles inserted within them, adsorbing particulate matter and oil mist from the oil fumes through high-voltage electrostatic action. However, after long-term operation, grease will accumulate on the inner wall of the anode cylinders, requiring regular spray cleaning to maintain purification efficiency. After cleaning, residual moisture on the inner wall of the anode cylinders, if not completely dried, can lead to increased conductivity and abnormal high-voltage discharge, causing equipment malfunctions.

[0003] In traditional fume purification equipment, the cylindrical electrostatic field is only sprayed for cleaning, followed by compressed air purging to accelerate drying. Specifically, compressed air is introduced into the fume purification equipment, and the airflow impact force removes moisture from the inner wall of the anode cylinder. However, during the cleaning stage, spraying alone is inefficient and fails to remove stubborn grease from the inner wall of the anode cylinder; furthermore, relying solely on airflow for drying results in low drying efficiency for the anode cylinder. This dual inefficiency in cleaning and drying prolongs the equipment's downtime for cleaning.

[0004] It is evident that existing technologies still need improvement and enhancement. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an oil fume purification device with self-cleaning and drying functions of a cylindrical electrostatic field, aiming to solve the technical problem of low self-cleaning and drying efficiency of the cylindrical electrostatic field in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Oil fume purification equipment with cylindrical electrostatic field self-cleaning and drying functions includes:

[0008] The casing has an air inlet and an air outlet arranged along the direction of flue gas flow.

[0009] Two rotating mechanisms are respectively located at the air inlet and the air outlet. Each rotating mechanism has a fan blade that rotates around its own axis at the output end. Each fan blade includes an air distribution plate with an included angle and a sealing plate. When the air distribution plates of multiple fan blades are spliced ​​together in sequence, they are in the flue gas purification stage. When the sealing plates of multiple fan blades are spliced ​​together in sequence, they are in the self-cleaning and drying stage.

[0010] At least one cylindrical electrostatic field includes an outer shell, several anode cylinders, and a cathode frame. All anode cylinders are located inside the outer shell, and the two ends of each anode cylinder are respectively connected to the two side walls of the outer shell. The outer walls of all anode cylinders form a closed region with the inner wall of the outer shell, and the axis of the anode cylinders is coaxial with the flow direction of the flue gas. The cathode frame is mounted on the outer shell through several insulators, and the cathode frame is provided with several cathode needles, each cathode needle being inserted into an anode cylinder.

[0011] At least one cleaning device includes a translation mechanism mounted on a housing, a swing mechanism mounted at the output end of the translation mechanism, and a spray frame mounted at the output end of the swing mechanism. The spray frame includes a plurality of spray pipes arranged in parallel at intervals. Each spray pipe is provided with a plurality of first nozzles facing the anode cylinder. Each spray pipe is connected to a first main pipe. A water inlet pipe and an air inlet pipe are connected in parallel to the first main pipe. A first control valve is provided on the water inlet pipe, and a water supply device is connected to its end. A second control valve is provided on the air inlet pipe, and an air supply device is connected to its end.

[0012] The first steam pipe is installed on the outer casing and extends into the enclosed area;

[0013] A drain pipe is located at the bottom of the casing and extends into the enclosed area; a drain valve is provided on the drain pipe.

[0014] Several second steam pipes are evenly distributed on the top of the machine casing. All the second steam pipes are connected to a third steam pipe, which extends to the outside of the machine casing. Both the first steam pipe and the third steam pipe are externally connected to steam generating equipment.

[0015] Furthermore, the rotating mechanism includes:

[0016] The drive shaft is rotatably connected to the housing; several worm gears are arranged at intervals along the axial direction on the drive shaft.

[0017] The first motor is mounted on the housing, and its output end is connected to the drive shaft;

[0018] A rotating shaft is fixed on the fan blade and rotatably connected to the casing. The end of the rotating shaft is equipped with a worm wheel that meshes with a worm gear. The fan blade is driven to rotate around the rotating shaft through the transmission of the worm wheel and the worm gear.

[0019] Furthermore, the widths of the air distribution plate and the sealing plate are equal and the included angle is °; the line connecting their free ends together with the air distribution plate and the sealing plate forms an equilateral triangle structure, and the rotation axis is located at the geometric center of this equilateral triangle structure.

[0020] Furthermore, the free end of the sealing sheet is provided with a sealing strip, which extends along the length of the sealing sheet.

[0021] Furthermore, the spray frame includes two parallel first and second uprights, which are slidably connected to the machine housing; both ends of the spray pipe are rotatably connected to the first and second uprights, and the ends are connected to the first main pipe through a rotary joint; the swing mechanism includes a rocker arm fixed on each spray pipe, a first cylinder fixed on the first upright, and a vertical rod at the output end of the first cylinder. The rocker arm has a waist hole, and a first roller is rotatably connected to the vertical rod, with the first roller slidingly engaged with the rocker arm.

[0022] Furthermore, the side wall of the first upright is provided with a side plate, and the side plate is provided with a vertical groove; the translation mechanism includes a second motor fixed on the housing, a turntable provided at the output end of the second motor, and a sliding column provided at the edge of the turntable, the sliding column being slidably connected to the vertical groove.

[0023] Furthermore, it also includes a protective cover located on the outer wall of the casing, the end of the spray pipe being rotatably connected to the casing wall and extending into the interior of the protective cover, the first upright, the swing mechanism and the translation mechanism being located inside the protective cover, and the second upright being located inside the casing.

[0024] Furthermore, the first nozzle is a duckbill-shaped nozzle, and each of the spray pipes is provided with two rows of first nozzles, which are staggered from each other.

[0025] Furthermore, at least one of the first steam pipes is located on the top of the outer casing, and multiple first steam pipes are connected to a fourth steam pipe. The third and fourth steam pipes are connected to a second main pipe, and a pressure gauge is installed on the second main pipe.

[0026] Furthermore, the air intake pipe is provided with a hot air treatment unit, which includes a hot air box located between the second control valve and the air supply device, several heating components, and several partitions spaced apart in the hot air box. The partitions cooperate to form a serpentine air duct, and each heating component is embedded in a corresponding partition.

[0027] Beneficial effects:

[0028] This invention provides an oil fume purification device with a cylindrical electrostatic field self-cleaning and drying function, which has the following beneficial effects: (1) The rotating mechanism drives the fan blade to rotate, and the air distribution plate seals the air inlet and outlet to form a guide channel. The flue gas is purified by passing through the cylindrical electrostatic field; (2) The rotating mechanism drives the fan blade to rotate, and the sealing plate seals the air inlet and outlet to form a sealed cavity. High-temperature steam is introduced into the sealed cavity to dissolve stubborn oil stains. Combined with the swing mechanism and translation mechanism, the first nozzle is driven to perform a compound movement. The first nozzle sprays cleaning liquid to thoroughly rinse the cylindrical electrostatic field, the inner wall of the casing and the air distribution plate, achieving efficient self-cleaning; (3) High-temperature steam is introduced into the sealed area inside the outer shell. The cleaning liquid attached to the inner wall of the anode cylinder and the outer wall of the outer shell is heated and evaporated by heat conduction. Combined with the compound movement of the first nozzle, the first nozzle sprays compressed gas to thoroughly blow the cylindrical electrostatic field, the inner wall of the casing and the air distribution plate, achieving efficient self-drying and effectively shortening the equipment downtime. Attached Figure Description

[0029] Figure 1 This is a main sectional view of the present invention;

[0030] Figure 2 This is a side sectional view of the present invention;

[0031] Figure 3 This is a schematic diagram of the connection of the spray pipe in this invention;

[0032] Figure 4 This is a cross-sectional view of the hot air treatment unit in this invention;

[0033] Figure 5 This is a structural diagram of the cylindrical electrostatic field in this invention;

[0034] Figure 6 This is a cross-sectional view of the cylindrical electrostatic field in this invention;

[0035] Figure 7 This is a schematic diagram of the connection of the steam pipe in this invention;

[0036] Figure 8 This is a structural diagram of the swing mechanism in this invention;

[0037] Figure 9 This is an exploded view of the swing mechanism in this invention;

[0038] Figure 10 This is an exploded view of the translation mechanism in this invention;

[0039] Figure 11 The structure of the rotating mechanism in this invention Figure 1 ;

[0040] Figure 12 This is a schematic diagram of the air distribution plate sealing the air inlet and outlet in this invention. Figure 1 ;

[0041] Figure 13 This is a schematic diagram of the sealing sheet sealing the air inlet and outlet in this invention. Figure 1 ;

[0042] Figure 14 for Figure 13 Enlarged view of point A;

[0043] Figure 15 The structure of the rotating mechanism in this invention Figure 2 ;

[0044] Figure 16 This is a schematic diagram of the air distribution plate sealing the air inlet and outlet in this invention. Figure 2 ;

[0045] Figure 17 This is a schematic diagram of the sealing sheet sealing the air inlet and outlet in this invention. Figure 2 .

[0046] Reference numerals: 1. Housing; 11. Air inlet; 12. Air outlet; 13. Protective cover; 14. First track; 15. Second track; 16. Rotating mechanism; 2. Drive shaft; 21. Worm gear; 22. First motor; 23. Rotating shaft; 24. Worm wheel; 25. Second cylinder; 26. Rack; 27. Gear; 28. Fan blade; 3. Air distribution vane; 31. Sealing plate; 32. Sealing strip; 33. Cylindrical electrostatic field; 4. Outer shell; 41. Drain pipe; 411. Drain valve; 412. Water collection section; 413. Anode cylinder; 42. Cathode frame; 43. Enclosed area; 44. Insulator; 45. Cathode needle; 46. Translation mechanism; 5. Second motor; 51. Turntable; 52. Adjustment groove; 521. Slider; 522. Screw; 523. Sliding column; 53. Second roller; 54. Swinging mechanism; 6. Rocker arm; 61. Waist hole; 611. First cylinder; 62. Vertical... Rod 63, first roller 64, spray frame 7, spray pipe 71, first nozzle 711, rotary joint 712, second nozzle 713, first main pipe 72, first upright 73, side plate 731, vertical groove 732, first pulley 733, second upright 74, second pulley 741, water inlet pipe 8, first control valve 81, water supply device 82, water pump 821, water tank 822, air inlet pipe 9, second control valve 91, air supply device 92, centrifugal fan 921, air filter assembly 922, first steam pipe 10, fourth steam pipe 101, second main pipe 102, pressure gauge 103, third control valve 104, second steam pipe 20, third steam pipe 201, hot air treatment unit 30, hot air box 301, heating assembly 302, partition 303, serpentine air duct 304. Detailed Implementation

[0047] This invention provides an oil fume purification device with a cylindrical electrostatic field self-cleaning and drying function. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention.

[0048] In the description of this invention, it should be understood that the terms "upper," "lower," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on the invention. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "multiple" means two or more.

[0049] Please see Figures 1 to 17As shown, the present invention provides an oil fume purification device with a cylindrical electrostatic field self-cleaning and drying function, comprising: a housing 1, two rotating mechanisms 2, at least one cylindrical electrostatic field 4, at least one cleaning device, a first steam pipe 10, a drain pipe 411, and several second steam pipes 20; the housing 1 is provided with an air inlet 11 and an air outlet 12 along the flue gas flow direction; the two rotating mechanisms 2 are respectively located at the air inlet 11 and the air outlet 12, and each rotating mechanism 2 has a fan blade 3 rotating around its own axis at its output end, each fan blade 3 including an air distribution plate 31 with an included angle and a sealing plate 32; the multiple fan blades 3 have an air distribution plate 31 with an included angle and a sealing plate 32; the multiple fan blades 3 have an air distribution plate 31 with an included angle and a sealing plate 32; the multiple fan blades 3 have an air distribution plate 31 with an included angle and a drying plate 32. When the fan blades 31 are sequentially assembled, they are in the flue gas purification stage; when the sealing plates 32 of multiple fan blades 3 are sequentially assembled, they are in the self-cleaning and drying stage. The cylindrical electrostatic field 4 includes a shell 41, several anode cylinders 42, and a cathode frame 43. All anode cylinders 42 are located inside the shell 41, and the two ends of each anode cylinder 42 are respectively connected to the two side walls of the shell 41. The outer walls of all anode cylinders 42 and the inner wall of the shell 41 form a closed area 44, and the axis of the anode cylinders 42 is coaxial with the flue gas flow direction. The cathode frame 43 is mounted on the shell 41 through several insulators 45. The cathode frame 43 is provided with a plurality of cathode needles 46, each cathode needle 46 being inserted into an anode cylinder 42. The cleaning device includes a translation mechanism 5 on the housing 1, a swing mechanism 6 at the output end of the translation mechanism 5, and a spray frame 7 at the output end of the swing mechanism 6. The spray frame 7 includes a plurality of spray pipes 71 arranged in parallel and spaced apart. Each spray pipe 71 is provided with a plurality of first nozzles 711 facing the anode cylinder 42. Each spray pipe 71 is connected to a first main pipe 72. A water inlet pipe 8 and an air inlet pipe 9 are connected in parallel to the first main pipe 72. A first control valve is provided on the water inlet pipe 8. 81, and its end is connected to a water supply device 82; the air inlet pipe 9 is provided with a second control valve 91, and its end is connected to an air supply device 92; the first steam pipe 10 is installed on the outer casing 41 and extends into the enclosed area 44; the drain pipe 411 is located at the bottom of the outer casing 41 and extends into the enclosed area 44, and the drain pipe 411 is provided with a drain valve 412; multiple second steam pipes 20 are evenly distributed on the top of the casing 1, all the second steam pipes 20 are connected to a third steam pipe 201, the third steam pipe 201 extends to the outside of the casing 1, and both the first steam pipe 10 and the third steam pipe 201 are externally connected to steam generating equipment.

[0050] Flue gas purification stage, such as Figure 12 , 16The rotating mechanism 2 drives the fan blades 3 to rotate. The air distribution vanes 31 of each fan blade 3 are sequentially spliced ​​together to seal the air inlet 11 and the air outlet 12. At this time, the air inlet 11 and the air outlet 12 form a continuous flow channel. The flue gas enters the casing 1 from the air distribution vanes 31 of the air inlet 11. When it flows through the cylindrical electrostatic field 4, the oil and particulate matter is captured under the action of the high voltage electrostatic field between the anode cylinder 42 and the cathode needle 46. Finally, the purified flue gas is discharged from the air distribution vanes 31 of the air outlet 12.

[0051] During the cleaning stage, such as Figure 13 , 17 The rotating mechanism 2 drives the fan blades 3 to rotate. The sealing plates 32 of each fan blade 3 are sequentially spliced ​​to seal the air inlet 11 and the air outlet 12, so that a sealed cavity is formed inside the casing 1. The high-temperature steam generated by the steam generator enters the sealed cavity through the third steam pipe 201 and the second steam pipe 20. The steam diffuses and penetrates into the inner wall of the anode cylinder 42, the outer wall of the outer casing 41 and the inner wall of the casing 1 in the sealed cavity, and decomposes stubborn oil stains through the thermal melting effect. After a period of time, the water supply device 82 is turned on, and the first control valve 81 is opened and the second control valve 91 is closed. The cleaning liquid is transported to each spray pipe 71 through the water inlet pipe 8 and the first main pipe 72. The first nozzle 711 sprays water from multiple angles to rinse the inner wall of the anode cylinder 42 and the inner wall of the casing 1. At the same time, the translation mechanism 5 drives the spray pipe 71 to move axially and the swing mechanism 6 drives the spray pipe 71 to swing back and forth. Through the compound motion, the coverage of the cleaning first nozzle 711 is expanded to ensure that the electrostatic field and the inner wall of the casing 1 are thoroughly rinsed. By using high-temperature steam to dissolve oil stains and then rinsing with cleaning fluid, the oil stain removal and rinsing are simultaneously enhanced, thus accelerating the self-cleaning efficiency.

[0052] During the drying stage, the steam generator switches to supply high-temperature steam to the first steam pipe 10, which is then introduced into the enclosed area 44 of the cylindrical electrostatic field 4. The steam heat conduction rapidly heats the walls of the anode cylinder 42 and the outer casing 41, accelerating moisture evaporation. Simultaneously, the gas supply device 92 switches to supply compressed gas to the spray pipe 71. The first control valve 81 closes, and the second control valve 91 opens. The compressed gas flows through the inlet pipe 9, the first main pipe 72, and the spray pipe 71 to each first nozzle 711, thus spraying compressed gas towards the cylindrical electrostatic field 4 and the inner wall of the casing 1. With the coordinated drive of the translation mechanism 5 and the swing mechanism 6, the first nozzles 711 swing and move axially, allowing the compressed gas to sweep the cylindrical electrostatic field 4 and the inner wall of the casing 1 in all directions, accelerating the evaporation and removal of residual cleaning agents. Through high-temperature steam drying and gas purging, the self-drying efficiency is accelerated. The entire process, through the synergistic effect of steam pyrolysis, dynamic rinsing, steam drying, and gas purging evaporation, significantly improves cleaning efficiency and shortens cleaning and drying time.

[0053] The steam generating equipment described above can utilize the company's existing boiler system. Typically, companies already have boiler equipment to meet daily production needs, and the high-temperature, high-pressure steam generated can be connected to the first steam pipe 10 and the third steam pipe 201 of this device via branch pipes. The high-temperature steam output from the boiler is continuously injected into the enclosed area 44 through the branch pipes, utilizing the existing boiler capacity for drying and continuously injecting high-temperature steam into the sealed cavity within the casing 1 for oil dissolution. This eliminates the need for additional dedicated steam generating equipment, thereby reducing equipment investment and maintenance costs. The first steam pipe 10 and the third steam pipe 201 are each independently equipped with a third control valve 104 to control the direction of steam delivery.

[0054] As described above, the air distribution plate 31 has ventilation holes arranged in a matrix to achieve air distribution.

[0055] This equipment offers multiple cleaning layout options for different operating conditions. In one embodiment, with a single cylindrical electrostatic field 4 and cleaning device, the cleaning device is positioned close to the air outlet 12. Since the flue gas flow begins at the air inlet 11, a significant amount of oil adheres to the air distribution vanes 31 of the air inlet 11. Utilizing the flue gas flow direction characteristics, most of the cleaning liquid sprayed by the first nozzle 711 on the spray pipe 71 washes the cylindrical electrostatic field 4, while a small portion penetrates the anode cylinder 42 and reaches the fan blades 3 of the air inlet 11 in the reverse direction, effectively removing the oil accumulated on the air distribution vanes 31 of the fan blades 3.

[0056] In another implementation, such as Figure 1 As shown, when the dual-cylinder electrostatic field 4 is combined with a single cleaning device, or when the single-cylinder electrostatic field 4, a single-plate electrostatic field, and a single cleaning device are combined, the cleaning device is located between the two electrostatic fields. Each spray pipe 71 is simultaneously equipped with a symmetrically arranged first nozzle 711 and second nozzle 713. The first nozzle 711 and the second nozzle 713 spray a neighboring electrostatic field, respectively. Most of the cleaning liquid sprayed from the nozzles washes the electrostatic field, and a small portion of the cleaning liquid passes through the anode cylinder 42 or the electrode plate to reach the fan blades 3 of the air inlet 11 and the air outlet 12 to wash all the air distribution vanes 31. In this embodiment, the above-described implementation is preferred.

[0057] In a preferred embodiment, see [reference] Figure 11The rotating mechanism 2 includes a transmission shaft 21, a first motor 23, and a rotating shaft 24. The transmission shaft 21 is rotatably connected to the housing 1. Several worm gears 22 are arranged at intervals along the axial direction on the transmission shaft 21. The first motor 23 is mounted on the housing 1, and its output end is connected to the transmission shaft 21. The rotating shaft 24 is fixed on the fan blade 3 and rotatably connected to the housing 1. The end of the rotating shaft 24 is provided with a worm wheel 25 that meshes with the worm gears 22. The fan blade 3 is driven to rotate around the rotating shaft 24 through the transmission of the worm wheel 25 and the worm gears 22. The first motor 23 drives the transmission shaft 21 to rotate, which in turn drives each section of the worm gear 22 to rotate synchronously. The worm gear 22 meshes with the corresponding worm wheel 25 to drive the corresponding rotating shaft 24 to rotate, so that all the fan blades 3 rotate synchronously around the rotating shaft 24. When all the air distribution vanes 31 rotate to the same vertical plane, the air distribution vanes 31 close the air inlet 11 and the air outlet 12 to form a continuous flow channel for the flue gas to flow through the inside of the casing 1, and the equipment is in the flue gas purification stage. When all the sealing plates 32 rotate to the same vertical plane, the sealing plates 32 close the air inlet 11 and the air outlet 12 to form a sealed cavity inside the casing 1, and the equipment is in the cleaning and drying stage.

[0058] In addition to driving the rotating shaft 24 to rotate via the worm gear 25 and worm 22 mechanism, it can also be driven by a gear and rack meshing mechanism, see [reference]. Figure 15 Specifically, a second cylinder 26 is provided on the housing 1. A rack 27 is connected to the output end of the second cylinder 26. The rack 27 is slidably connected to the housing 1. A gear 28 that meshes with the rack 27 is fixed on the rotating shaft 24. When the extension rod of the second cylinder 26 extends or retracts, it drives the rack 27 to translate. The rack 27 meshes with multiple gears 28 to drive each fan blade 3 to rotate around the connected rotating shaft 24.

[0059] See above. Figure 1 To improve the reliability of the rotating mechanism 2, a protective cover 14 is provided on the inner wall of the housing 1. The protective cover 14 completely covers the extension of the rotating shaft 24, the worm gear 25, and the worm 22, effectively isolating the flue gas corrosion and cleaning fluid erosion, and ensuring the long-term stable operation of the transmission structure.

[0060] In one implementation, see [reference] Figure 12 , 13The air distribution vane 31 and the sealing plate 32 have equal widths and an included angle of 60°. The line connecting their free ends, together with the air distribution vane 31 and the sealing plate 32, forms an equilateral triangle structure. The rotation axis 24 is located at the geometric center of this equilateral triangle structure, meaning that the free ends and connecting ends of the air distribution vane 31 and the sealing plate 32 are all equidistant from the axis of the rotation axis 24. Through the above arrangement, the movement trajectories of adjacent fan blades 3 do not interfere with each other during rotation, ensuring the reliability of synchronous rotation of multiple fan blades 3. Furthermore, when the fan blades 3 rotate around the rotation axis 24, the position of the air distribution vane 31 at the air inlet 11 / air outlet 12 completely coincides with the position of the sealing plate 32 when it is switched to the closed state, which simplifies the structure and eliminates the need for additional sealing structures.

[0061] It should be noted that during the cleaning and drying stages, the sealing plate 32 rotates to the air inlet 11 position, and the air distribution plate 31 rotates synchronously with the rotating shaft 24 at a 60° angle, which is conducive to rinsing by the cleaning liquid sprayed by the first nozzle 711 and the second nozzle 713.

[0062] In another implementation, see [reference needed]. Figure 16 , 17 The widths of the air distribution vane 31 and the sealing plate 32 are equal, and the rotating shaft 24 is located at the connection end of the air distribution vane 31 and the sealing plate 32. When the equipment switches from the flue gas purification stage to the cleaning stage, the fan blade 3 rotates around the rotating shaft 24, causing the sealing plate 32 to shift as a whole to the original working position of the air distribution vane 31 in the adjacent fan blade 3. At this time, all the sealing plates 32 are laterally offset by one blade width from the working position of the air distribution vane 31 at the air inlet 11 / air outlet 12. This misalignment causes strip-shaped gaps to form between the first and last fan blades 3 and the side walls of the air inlet 11 / air outlet 12 after rotation. Therefore, fixed baffles need to be added to both sides of the air inlet 11 / air outlet 12 to ensure the sealing effect of the fan blade 3 at different stages.

[0063] Further, see Figure 13 , 14 The free end of the sealing sheet 32 ​​is provided with a sealing strip 33, which extends along the length of the sealing sheet 32. During the cleaning and drying stages, the sealing strip 33 on each sealing sheet 32 ​​contacts the connecting end on the adjacent sealing sheet 32 ​​to eliminate the gap between two adjacent sealing sheets 32, improve the sealing performance of the sealed cavity formed in the housing 1, and facilitate the dissolution of oil stains in the sealed cavity by high-temperature steam in the subsequent process.

[0064] In a preferred embodiment, see [reference] Figure 2 , 89. The spray frame 7 includes two parallel first uprights 73 and second uprights 74, which are slidably connected to the housing 1. The two ends of the spray pipe 71 are rotatably connected to the first uprights 73 and second uprights 74, and the end is connected to the first main pipe 72 through a rotary joint 712 to ensure that the pipe remains sealed during the swing. The swing mechanism 6 includes a rocker arm 61 fixed on each spray pipe 71, a first cylinder 62 fixed on the first upright 73, and a vertical rod 63 located at the output end of the first cylinder 62. The rocker arm 61 has a waist hole 611, and a first roller 64 is rotatably connected to the vertical rod 63. The first roller 64 is slidably engaged with the rocker arm 61. Specifically, the vertical rod 63 is vertically slidably connected to the first upright 73 to avoid the vertical rod 63 from rotating circumferentially and affecting the smoothness of the movement. When the extension rod of the first cylinder 62 extends or retracts, the drive rod 63 moves up and down in the vertical direction, and the first roller 64 slides along the waist hole 611 and pushes the rocker arm 61 to swing around the axis of the corresponding spray pipe 71, thereby driving each spray pipe 71 to swing around its own axis, thus realizing the dynamic adjustment of the spray angle of the first nozzle 711.

[0065] In the above description, the rotary joint 712 is a straight-through rotary joint, model JSGQZT50B, which is suitable for gas or liquid media.

[0066] Further, see Figure 8 , 9 The first upright 73 has a side plate 731 on its side wall, and a vertical groove 732 is formed on the side plate 731. The translation mechanism 5 includes a second motor 51 fixed on the housing 1, a turntable 52 located at the output end of the second motor 51, and a sliding column 53 located at the edge of the turntable 52. The sliding column 53 is slidably connected to the vertical groove 732. Specifically, a second roller 54 is rotatably connected to the sliding column 53, and the second roller 54 is slidably engaged with the vertical groove 732. When the second motor 51 drives the turntable 52 to rotate, the sliding column 53 makes a circular motion around the center of the turntable 52, and the second roller 54 slides up and down along the vertical groove 732 and pushes the side plate 731 and the first upright 73 to move back and forth along the housing 1, thereby driving all the spray pipes 71 to move axially. During this process, the swing mechanism 6 synchronously drives each spray pipe 71 to swing around its own axis, forming a composite motion mode of axial translation and self-rotation swing, ensuring that there are no dead angles in the spray coverage.

[0067] Preferably, see Figure 10The turntable 52 is provided with a radially extending adjustment groove 521. A slider 522 is slidably connected in the adjustment groove 521, and a sliding column 53 is fixed on the slider 522. A screw 523 is also rotatably connected in the adjustment groove 521. The screw 523 meshes with the slider 522. Rotating the screw 523 drives the slider 522 to slide along the adjustment groove 521, thereby adjusting the distance between the sliding column 53 and the center of the turntable 52, and thus changing the travel distance of the spray pipe 71 axial reciprocating movement to adapt to different electrostatic field sizes.

[0068] In the above embodiments, see Figure 2 To extend the service life of the swing mechanism 6 and the translation mechanism 5 and prevent them from being corroded by cleaning fluid and fumes, a protective cover 13 is also included on the outer wall of the housing 1. The end of the spray pipe 71 is rotatably connected to the wall of the housing 1 and extends into the protective cover 13. The first support 73, the swing mechanism 6, and the translation mechanism 5 are all located inside the protective cover 13, and the second support 74 is located inside the housing 1. Because the spray pipe 71 is sealed to the wall of the housing 1, fumes and cleaning fluid can be prevented from splashing into the protective cover 13. In addition, the protective cover 13 can be equipped with a cabinet door to facilitate regular maintenance or replacement of internal components, while preventing external contaminants from entering.

[0069] Preferably, see Figure 2 , 8 The housing 1 has a first track 15 at its top and bottom, and the protective cover 13 has a second track 16 at its top and bottom. The first track 15 and the second track 16 have triangular cross-sections. The first support 73 is slidably connected to the first track 15 via a first pulley 733, and the second support 74 is slidably connected to the second track 16 via a second pulley 741. Specifically, the surfaces of the first pulley 733 and the second pulley 741 are provided with V-shaped grooves that match the triangular track. The V-shaped grooves contact the triangular surface of the track, limiting the axial movement of the pulleys and preventing deviation. At the same time, the inclined design of the triangular track guides the cleaning fluid to flow naturally down the inclined surface, avoiding liquid stagnation and accumulation on the track surface, thereby reducing the risk of corrosion.

[0070] In a preferred embodiment, see [reference] Figure 1The first nozzle 711 is a duckbill-shaped nozzle, specifically, the duckbill-shaped nozzle is inclined, that is, there is a certain angle between the spray nozzle and the horizontal plane, so as to enhance the impact and coverage of the cleaning liquid on the electric field surface; each spray pipe 71 is provided with two rows of first nozzles 711, and the two rows of first nozzles 711 are staggered. Similarly, a second nozzle 713 is added to the spray pipe 71 to achieve synchronous rinsing of the electrostatic electric field on both sides. There are two rows of second nozzles 713, and the two rows of second nozzles 713 are staggered. During the reciprocating swing of the spray pipe 71 driven by the swing mechanism 6, the spray range of the two rows of nozzles partially overlaps, eliminating the cleaning blind spots on the electrostatic electric field surface and the inner wall of the casing 1, ensuring that the oil residue area is repeatedly rinsed; the staggered layout combined with the swing and axial composite motion makes the cleaning liquid or compressed gas form multi-angle cross impacts in complex areas such as the electrostatic electric field gap and the corners of the casing 1, which significantly improves the cleaning uniformity and coverage density.

[0071] In a preferred embodiment, at least one of the first steam pipes 10 is disposed at the top of the outer casing 41. Specifically, when the first steam pipe 10 is a single pipe, it is preferably arranged at the center of the top of the outer casing 41. Due to the physical characteristics of high-temperature steam having low density and naturally rising, when steam is introduced from the top, the steam can diffuse downwards along the closed area 44 between the inner wall of the outer casing 41 and the outer wall of the anode cylinder 42, while gradually sinking under the influence of gravity. This flow path allows the steam to fully contact the top space of the closed area 44 and cover the circumferential surface of the outer wall of the anode cylinder 42 as it sinks, thereby reducing the problem of uneven distribution of steam caused by accumulation at the top during the rising process.

[0072] See Figure 5 , 6 When there are multiple first steam pipes 10, for situations where the cylindrical electrostatic field 4 is large in size or has a lot of residual moisture after cleaning, multiple first steam pipes 10 can be set on the top and side walls of the outer shell 41 respectively. For example, two first steam pipes 10 can be symmetrically arranged on the top of the outer shell 41, and one first steam pipe 10 can be added on each of the two side walls. The multiple first steam pipes 10 are connected to the same fourth steam pipe 101, and the fourth steam pipe 101 is connected to a steam generating device. By introducing steam at multiple points simultaneously, the diffusion rate of high-temperature steam in the enclosed area 44 can be significantly improved, and the time for steam to fill the entire space can be shortened, which is especially suitable for cylindrical electrostatic fields 4 with a large lateral length.

[0073] See Figure 7The system comprises multiple first steam pipes 10 connected to a fourth steam pipe 101, and a third steam pipe 201 and a fourth steam pipe 101 connected to a second main pipe 102. A pressure gauge 103 is installed on the second main pipe 102. Specifically, a third control valve 104 is connected to each of the third steam pipes 201 and 101. Through the third control valve 104, steam can be selectively supplied to the sealed cavity inside the housing 1 or the closed area 44 inside the outer casing 41. The pressure gauge 103 monitors the pressure of the second main pipe 102 in real time. When the third control valve 104 opens the corresponding branch, the measured pressure value reflects the real-time operating condition of the target area. For example, during the cleaning stage, when the third steam pipe 201 is opened, the pressure gauge 103 displays the pressure of the sealed cavity; during the drying stage, when the fourth steam pipe 101 is switched on, the pressure of the closed area 44 is displayed. This single-gauge dual-zone monitoring mechanism significantly reduces the complexity of the steam pipeline system while ensuring data accuracy.

[0074] Preferably, see Figure 5 , 6 In a preferred embodiment, the bottom of the outer casing 41 is provided with a funnel-shaped water collection section 413, the sidewall of which slopes inward from top to bottom, forming a gradually narrowing guide structure. The drain pipe 411 is located at the bottom of the water collection section 413. During the steam drying process, water droplets generated by the condensation of high-temperature steam after contact with the outer wall of the anode cylinder 42 and the inner wall of the outer casing 41 flow downward along the outer wall of the anode cylinder 42 and the inner wall of the outer casing 41 under gravity, eventually converging at the funnel-shaped water collection section 413. Due to the inclined sidewall design of the water collection section 413, condensate can quickly concentrate at the inlet of the drain pipe 411, avoiding water accumulation at the bottom plane. The steam trap 412 promptly discharges the condensate outside the outer casing 41, while preventing backflow of external air or steam escape.

[0075] In a preferred embodiment, see [reference] Figure 3 , 4 The air intake pipe 9 is equipped with a hot air treatment unit 30. The hot air treatment unit 30 includes a hot air box 301 located between the second control valve 91 and the air supply device 92, several heating components 302, and several partitions 303 spaced apart within the hot air box 301. The partitions 303 cooperate to form a serpentine air duct 304, and each heating component 302 is embedded in one partition 303. The serpentine air duct 304 design extends the heating time to ensure the gas reaches the preset temperature. The heating components 302 can be heating wires or electric heating tubes. The heating components 302 are embedded within the partitions 303, facing the serpentine air ducts 304 on both sides and radiating heat towards them.

[0076] Preferably, a heating component 302 is added to the inner wall of the hot air box 301 near the serpentine air duct 304 to further improve the heat exchange efficiency.

[0077] See above. Figure 3The water supply device 82 includes a water pump 821 and a water tank 822. The water tank 822 is used to store cleaning fluid. The water inlet of the water pump 821 is connected to the water tank 822, and its outlet is connected to the water inlet pipe 8, so as to continuously pump cleaning fluid into the water inlet pipe 8. During the cleaning stage, the water pump 821 is started, and cleaning fluid is introduced into the spray pipe 71. The first nozzle 711 and the second nozzle 713 on the spray pipe 71 can spray out cleaning fluid.

[0078] The cleaning solution can be industrial water, water at a certain temperature, or water mixed with a cleaning agent. The specific choice can be made according to the type of oil stains, and no limitation is made on the cleaning solution here.

[0079] See above. Figure 3 The air supply device 92 includes a centrifugal fan 921 and an air filter assembly 922. The air filter assembly 922 is used to filter fine particles in the air to ensure the cleanliness of the compressed gas. The air inlet of the centrifugal fan 921 is connected to the air filter assembly 922, and its air outlet is connected to the air inlet pipe 9 to realize the continuous supply of compressed gas to the air inlet pipe 9.

[0080] In summary, this invention achieves efficient self-cleaning through high-temperature steam dissolution and dynamic spray rinsing; and achieves rapid self-drying by combining high-temperature steam heat conduction and hot air blowing, forming a closed-loop cleaning system.

[0081] Flue gas purification stage: Two rotating mechanisms 2 drive the fan blades 3 to rotate, and the air distribution vanes 31 are sequentially spliced ​​to seal the air inlet 11 and the air outlet 12, forming a continuous flow channel. The flue gas enters the casing 1 from the air distribution vanes 31 of the air inlet 11, and is discharged from the air distribution vanes 31 of the air outlet 12 after being purified by the cylindrical electrostatic field 4 and the plate electrostatic field.

[0082] Cleaning stage: Two rotating mechanisms 2 drive the fan blades 3 to rotate, and the sealing plates 32 are sequentially spliced ​​to seal the air inlet 11 and the air outlet 12, forming a sealed cavity inside the casing 1. The third control valve 104 on the third steam pipe 201 is opened, and steam enters the sealed cavity through the second main pipe 102, the third steam pipe 201 and multiple second steam pipes 20. The steam diffuses and penetrates into the electrostatic field surface, the inner wall of the casing 1 and the fan vane 3 in the sealed cavity, and decomposes stubborn oil stains through the thermal melting effect. Subsequently, the water supply device 82 is turned on, the first control valve 81 is opened and the second control valve 91 is closed. The cleaning liquid is sprayed out from the first nozzle 711 and the second nozzle 713 after passing through the water inlet pipe 8, the first main pipe 72 and the spray pipe 71. The swing mechanism 6 drives the spray pipe 71 to swing back and forth. The translation mechanism 5 drives the spray pipe 71 to move axially. The composite motion trajectory makes the cleaning liquid sprayed by the first nozzle 711 and the second nozzle 713 cover the cylindrical electrostatic field 4, the plate electrostatic field and the inner wall of the casing 1, achieving all-round cleaning without dead angles. Some of the cleaning liquid passes through the gaps in the electrostatic field and washes onto the fan vane 31 to clean the fan vane 31.

[0083] Drying Stage: The third control valve 104 on the fourth steam pipe 101 is opened, and steam enters the enclosed area 44 through the first main pipe 72, the fourth steam pipe 101, and multiple first steam pipes 10. The steam evaporates the cleaning liquid adhering to the inner wall of the anode cylinder 42 and the outer wall of the outer shell 41 through heat conduction. Simultaneously, the gas supply device 92 is switched to input compressed gas, the first control valve 81 is closed, and the second control valve 91 is opened. The compressed gas is heated by the hot air treatment unit 30 to form high-temperature gas. The high-temperature gas is sprayed out by the first nozzle 711 and the second nozzle 713 after passing through the air inlet pipe 9, the first main pipe 72, and the spray pipe 71. At the same time, the first nozzle 711 and the second nozzle 713, which are in compound motion, evenly sweep the electrostatic field and the inner wall of the casing 1, accelerating the evaporation of residual droplets. Similarly, some of the high-temperature gas passes through the gaps in the electrostatic field and is swept onto the air distribution plate 31 to dry the air distribution plate 31. Compared to existing technologies, the entire cleaning process significantly improves cleaning efficiency and shortens cleaning and drying time through the synergistic effect of steam pyrolysis, dynamic rinsing, steam drying, and air sweeping evaporation, thereby reducing equipment downtime.

[0084] It is understood that those skilled in the art can make equivalent substitutions or modifications to the technical solution and inventive concept of the present invention, and all such substitutions or modifications should fall within the protection scope of the appended claims.

Claims

1. An oil fume purification device with cylindrical electrostatic field self-cleaning and drying functions, characterized in that, include: The casing (1) has an air inlet (11) and an air outlet (12) arranged along the direction of flue gas flow; Two rotating mechanisms (2) are respectively located at the air inlet (11) and the air outlet (12). Each rotating mechanism (2) has a fan blade (3) that rotates around its own axis at its output end. Each fan blade (3) includes an air distribution plate (31) with an included angle and a sealing plate (32). When the air distribution plates (31) of multiple fan blades (3) are spliced ​​together in sequence, they are in the flue gas purification stage. When the sealing plates (32) of multiple fan blades (3) are spliced ​​together in sequence, they are in the self-cleaning and drying stage. At least one cylindrical electrostatic field (4) includes a shell (41), several anode cylinders (42) and a cathode frame (43). All anode cylinders (42) are located inside the shell (41), and the two ends of each anode cylinder (42) are respectively connected to the two side walls of the shell (41). The outer wall of all anode cylinders (42) and the inner wall of the shell (41) form a closed area (44), and the axis of the anode cylinder (42) is coaxial with the flow direction of the flue gas. The cathode frame (43) is installed on the shell (41) through several insulators (45), and several cathode needles (46) are provided on the cathode frame (43), with each cathode needle (46) corresponding to an anode cylinder (42). At least one cleaning device includes a translation mechanism (5) on the housing (1), a swing mechanism (6) at the output end of the translation mechanism (5), and a spray frame (7) at the output end of the swing mechanism (6). The spray frame (7) includes a plurality of spray pipes (71) arranged in parallel and spaced apart. Each spray pipe (71) is provided with a plurality of first nozzles (711) facing the anode cylinder (42). Each spray pipe (71) is connected to a first main pipe (72). A water inlet pipe (8) and an air inlet pipe (9) are connected in parallel on the first main pipe (72). A first control valve (81) is provided on the water inlet pipe (8), and its end is connected to a water supply device (82). A second control valve (91) is provided on the air inlet pipe (9), and its end is connected to an air supply device (92). A first steam pipe (10) is installed on the outer casing (41) and extends into the enclosed area (44); A drain pipe (411) is located at the bottom of the outer casing (41) and extends into the enclosed area (44). A drain valve (412) is provided on the drain pipe (411). Several second steam pipes (20) are evenly distributed on the top of the casing (1). All the second steam pipes (20) are connected to a third steam pipe (201). The third steam pipe (201) extends to the outside of the casing (1). Both the first steam pipe (10) and the third steam pipe (201) are connected to steam generating equipment.

2. The oil fume purification equipment with cylindrical electrostatic field self-cleaning and drying functions according to claim 1, characterized in that, The rotating mechanism (2) includes: A drive shaft (21) is rotatably connected to the housing (1); a number of worm gears (22) are arranged at intervals along the axial direction on the drive shaft (21); The first motor (23) is mounted on the housing (1) and its output end is connected to the drive shaft (21); A rotating shaft (24) is fixed on the fan blade (3) and rotatably connected to the housing (1). The end of the rotating shaft (24) is provided with a worm wheel (25) that meshes with the worm (22). The fan blade (3) is driven to rotate around the rotating shaft (24) through the transmission between the worm wheel (25) and the worm (22).

3. The oil fume purification equipment with cylindrical electrostatic field self-cleaning and drying functions according to claim 2, characterized in that, The widths of the air distribution plate (31) and the sealing plate (32) are equal and the included angle is 60°; the line connecting their free ends together with the air distribution plate (31) and the sealing plate (32) forms an equilateral triangle structure, and the rotation axis (24) is located at the geometric center of the equilateral triangle structure.

4. The oil fume purification equipment with cylindrical electrostatic field self-cleaning and drying functions according to claim 1, characterized in that, The free end of the sealing sheet (32) is provided with a sealing strip (33), which extends along the length of the sealing sheet (32).

5. The oil fume purification equipment with cylindrical electrostatic field self-cleaning and drying functions according to claim 1, characterized in that, The spray frame (7) includes two parallel first uprights (73) and second uprights (74), which are slidably connected to the housing (1). The two ends of the spray pipe (71) are rotatably connected to the first uprights (73) and second uprights (74), and the end is connected to the first main pipe (72) through a rotary joint (712). The swing mechanism (6) includes a rocker arm (61) fixed on each spray pipe (71), a first cylinder (62) fixed on the first upright (73), and a vertical rod (63) located at the output end of the first cylinder (62). The rocker arm (61) has a waist hole (611), and a first roller (64) is rotatably connected to the vertical rod (63). The first roller (64) is slidably engaged with the rocker arm (61).

6. The oil fume purification equipment with cylindrical electrostatic field self-cleaning and drying functions according to claim 5, characterized in that, The side wall of the first stand (73) is provided with a side plate (731), and the side plate (731) is provided with a vertical groove (732); the translation mechanism (5) includes a second motor (51) fixed on the housing (1), a turntable (52) provided at the output end of the second motor (51), and a sliding column (53) provided at the edge of the turntable (52), the sliding column (53) being slidably connected to the vertical groove (732).

7. The oil fume purification equipment with cylindrical electrostatic field self-cleaning and drying functions according to claim 5, characterized in that, It also includes a protective cover (13) on the outer wall of the housing (1), the end of the spray pipe (71) is rotatably connected to the wall of the housing (1) and extends into the protective cover (13), the first support (73), the swing mechanism (6) and the translation mechanism (5) are all located inside the protective cover (13), and the second support (74) is located inside the housing (1).

8. The oil fume purification equipment with cylindrical electrostatic field self-cleaning and drying functions according to claim 1, characterized in that, The first nozzle (711) is a duckbill-shaped nozzle, and each of the spray pipes (71) is provided with two rows of first nozzles (711), which are staggered from each other.

9. The oil fume purification equipment with cylindrical electrostatic field self-cleaning and drying functions according to claim 1, characterized in that, At least one first steam pipe (10) is provided on the top of the outer casing (41), and multiple first steam pipes (10) are connected to a fourth steam pipe (101). The third steam pipe (201) and the fourth steam pipe (101) are connected to a second main pipe (102), and a pressure gauge (103) is provided on the second main pipe (102).

10. The oil fume purification equipment with cylindrical electrostatic field self-cleaning and drying functions according to claim 1, characterized in that, The air intake pipe (9) is provided with a hot air treatment unit (30). The hot air treatment unit (30) includes a hot air box (301) located between the second control valve (91) and the air supply device (92), a number of heating components (302), and a number of partitions (303) spaced apart in the hot air box (301). Each partition (303) cooperates to form a serpentine air duct (304), and each heating component (302) is embedded in a partition (303).

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