Pollutant treatment device for powder coating production process flow
By designing a pollutant treatment device with a semi-circular dust collection tank and a rotating mechanism, the problem of low efficiency in classifying particles smaller than 10μm by wet dust collectors has been solved, achieving high-efficiency dust treatment and capacity expansion, while reducing equipment costs and floor space.
Patent Information
- Application Number
- CN202511475374.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-15
- Publication Date
- 2025-11-14
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing wet scrubbers are inefficient when handling particles smaller than 10μm, making it difficult to meet the "Emission Standard for Air Pollutants in the Coating Industry". Adding additional equipment and facilities will significantly increase costs.
A pollutant treatment device including a semi-circular dust collection tank, a rotating mechanism, and a sliding arc plate was designed. It can flexibly adjust the treatment process to achieve single-channel or double-channel wet treatment, and expand the dust collection position when needed through the expansion mechanism, avoiding the need to add additional equipment.
It achieves efficient wet treatment of dust gases during powder coating production, ensuring the treatment effect of the equipment under high dust conditions, and does not require the addition of new equipment when expanding capacity, thus reducing costs and space occupation.
Smart Images
Figure CN120939684A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of waste treatment technology, and in particular to a pollutant treatment device for a powder coating production process. Background Technology
[0002] Powder coating production employs a melt extrusion-cooling crushing-dry grinding process. The grinding mill, grading sieve, and powder conveying pipeline continuously release ultrafine resin and filler particles with a diameter <20μm under the action of a high-speed airflow at ambient temperature. The instantaneous dust concentration can reach 400-800mg / m³. 3 Due to the characteristics of powders, such as strong hydrophilicity, high abrasiveness, and explosion level St1-St2, wet scrubbers are commonly used in engineering. They utilize tangential air inlet to form a high-speed vortex, causing particles to collide with and be captured by the water film under centrifugal force. Simultaneously, cooling, humidification, and explosion-proof pressure relief are achieved. A single-stage device can remove ≥95% of particles larger than 30μm, and there is no need to frequently replace filter media. The operating cost is low, and it has become the standard configuration for exhaust gas treatment in powder manufacturing workshops.
[0003] Existing production lines typically include wet scrubbers on grinding mills, packaging machines, and crushers. However, with the expansion of the market for high-filler, high-gloss, and ultrafine powder coatings in recent years, the proportion of ultrafine powders such as titanium dioxide and barium sulfate in formulations has increased, leading to a corresponding rise in the proportion of particles <10μm in exhaust gas. Current wet scrubbers only offer a single wet treatment stage, resulting in low efficiency in classifying particles smaller than 10μm, and making it difficult to consistently meet the emission concentration requirement of ≤30mg / m³ for the "Emission Standard for Air Pollutants in the Coating Industry". 3 If a second wet scrubbing tower is connected in series, additional land, circulating pumps, wastewater treatment, and antifreeze insulation facilities will be required, significantly increasing both the initial investment and long-term operating costs.
[0004] Therefore, a pollutant treatment device for the powder coating production process is proposed to solve the above problems. Summary of the Invention
[0005] The purpose of this invention is to address the shortcomings of the prior art by proposing a pollutant treatment device for the powder coating production process.
[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a pollutant treatment device for a powder coating production process, comprising a semi-circular dust collection tank, a fan installed at the top of the inner side of the dust collection tank, an air inlet pipe fixedly connected through the outer wall of the dust collection tank, an L-shaped upper arc plate fixedly connected to the inner side of the dust collection tank relative to the position next to the air inlet pipe, an L-shaped lower arc plate fixedly connected to the side wall of the upper arc plate, and an upper guide plate fixedly connected to the inner side of the dust collection tank between the upper and lower arc plates. A semi-circular block is fixedly connected to the bottom of the dust collector. Both the semi-circular block and the inner side of the dust collector are provided with annular grooves. An arc-shaped frame is slidably connected to the inner side of each annular groove. An arc-shaped moving plate is provided on the inner side of each arc-shaped frame. A vertical plate is fixedly connected between the arc-shaped frames. An L-shaped sliding arc plate is fixedly connected to the side wall of the vertical plate. A lower guide plate is fixedly connected between the side of the arc-shaped frame that is close to the vertical plate and the sliding arc plate. A rotating mechanism for driving the arc-shaped frame to rotate is also provided. A baffle plate is provided next to the vertical plate.
[0007] In the above technical solution, an air discharge gap is further provided between the top of the upper guide plate and the inner side of the lower arc plate, an air discharge gap is provided between the top of the lower guide plate and the inner side of the sliding arc plate, the dust collector is filled with water, and there is a gap between the bottom of the vertical plate and the bottom of the dust collector.
[0008] In the above technical solution, the rotating mechanism further includes a rotating motor, a semi-circular frame is fixedly connected to the front side of the dust collection tank, and a rotating rod is rotatably connected between the bottom end of the semi-circular frame and the top end of the semi-circular block. The side end of the rotating rod is fixedly connected to the outer wall of one of the arc-shaped frames. The rotating motor is fixedly connected to the bottom end of the semi-circular frame. The output end of the rotating motor passes through the bottom end of the semi-circular frame and is fixedly connected to the top end of the rotating rod. The output end of the rotating motor is sealed and rotatably connected to the semi-circular frame.
[0009] In the above technical solution, further, each side wall of the arc-shaped frame is provided with an upper sealing strip, the arc-shaped moving plate is fixedly connected between the upper sealing strip and the partition plate, and the arc-shaped moving plate is slidably connected to the inner side of the arc-shaped frame. The side wall of the partition plate is provided with a telescopic groove, and an adjusting plate is slidably connected to the inner side of the telescopic groove. Several return springs are fixedly connected between the top of the adjusting plate and the top of the telescopic groove. The side wall of the adjusting plate is provided with a squeezing groove, and the top of the squeezing groove is inclined. The top of the lower arc-shaped plate is fixedly connected with a fixing rod, and a right-angle block with an arc-shaped inclined surface is fixedly connected to the side wall of the fixing rod.
[0010] In the above technical solution, a pair of lower sealing strips are fixedly connected to the side wall of the partition plate, and a sealing sheet is fixedly connected to the side wall of the lower arc-shaped plate.
[0011] In the above technical solution, a sludge hopper is fixedly connected to the front side of the dust collector, and sludge outlets are opened at both ends of the bottom front side of the dust collector. An exhaust pipe is fixedly connected through the top of the dust collector.
[0012] In the above technical solution, further, the side wall of the arc-shaped movable plate located on the outer side is provided with an installation port through the vertical plate and the partition plate. An upper sealing plate is installed on the installation port by bolt sealing. An installation joint is fixedly connected through the outer wall of the dust collection tank to the side of the upper sealing plate. A lower sealing plate is installed on the installation joint by bolt sealing. An expansion mechanism for expanding the dust collection system is also provided.
[0013] In the above technical solution, the expansion mechanism further includes an L-shaped upper baffle and an expansion joint, and the two sides of the upper baffle are inclined. During expansion installation, the upper sealing plate and the lower sealing plate are taken out, and then the upper baffle is inserted through the installation joint and tightly inserted between the vertical plate and the partition plate. The upper baffle is then sealed and installed on the installation port with bolts. A protruding connecting strip is fixedly connected to the bottom of the connection end of the expansion joint. Finally, the expansion joint is sealed and installed on the installation port and the side wall of the upper baffle with bolts. Rubber pads are fixedly connected to the inclined surfaces on both sides of the upper baffle.
[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention, through the arrangement of structures such as an arc-shaped dust collection tank, a rotating mechanism, and a sliding arc-shaped plate, can flexibly adjust the treatment process of the pollutant treatment device according to the production process of powder coatings. Thus, it can not only perform single-stage wet treatment of dust gas in the powder coating production process, but also quickly adjust the position of structures such as the sliding arc-shaped plate and the vertical plate when producing powder coatings with large amounts of dust, thereby quickly sealing and combining the two wet structures together. This allows the dusty gas to undergo two stages of wet treatment, ensuring the treatment effect of the device.
[0015] 2. By designing the installation port and expansion mechanism, this invention enables the expansion pipe to be quickly and sealed to the second wet treatment structure when the powder coating production line is expanded or when additional dust collection points are needed. Thus, only the power of the fan needs to be adjusted to quickly expand the powder coating production line without adding a new wet dust collector, further improving the convenience of the device. Attached Figure Description
[0016] Figure 1 This is a three-dimensional structural diagram of the dust collector tank of the present invention. Figure 2 This is a rear-view perspective three-dimensional structural diagram of the dust collector tank of the present invention; Figure 3 This is a partial cross-sectional three-dimensional structural diagram of the dust collector tank of the present invention; Figure 4 This is a partial cross-sectional three-dimensional structural diagram of the dust collector tank of the present invention; Figure 5 Appendix of the present invention Figure 4 A magnified view of the structure at point A in the middle; Figure 6 This is a schematic diagram of the three-dimensional structure of the upper and lower guide plates, the rotary motor, and the arc-shaped frame of the present invention. Figure 7 This is a top view of a partially sectional three-dimensional structure of the dust collector of the present invention; Figure 8 This is a partial three-dimensional structural diagram of the rotary motor, partition plate, and arc frame of the present invention; Figure 9 This is a partial three-dimensional structural diagram showing the separation of the dust collector, upper baffle, and mounting joint of the present invention. Figure 10 This is a schematic diagram of the overall appearance structure of the mounting connector and upper baffle of the present invention.
[0017] In the diagram: 1. Dust collector; 2. Sewage hopper; 3. Sewage outlet; 4. Exhaust pipe; 5. Fan; 6. Inlet pipe; 7. Upper arc plate; 8. Lower arc plate; 9. Upper guide plate; 10. Semicircular block; 11. Annular groove; 12. Arc frame; 13. Vertical plate; 14. Sliding arc plate; 15. Lower guide plate; 16. Baffle plate; 17. Rotary motor; 18. Semicircular frame; 19. Rotating rod; 20. Upper sealing strip; 21. Arc moving plate; 22. Telescopic groove; 23. Adjusting plate; 24. Return spring; 25. Extrusion groove; 26. Fixed rod; 27. Right-angle block; 28. Lower sealing strip; 29. Sealing sheet; 30. Installation port; 31. Upper sealing plate; 32. Installation joint; 33. Lower sealing plate; 34. Upper baffle; 35. Expansion joint; 36. Protruding connecting strip; 37. Rubber pad. Detailed Implementation
[0018] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0019] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the invention is not limited to the specific embodiments disclosed below.
[0020] In practical applications, it has been found that the market for high-filler, high-gloss, and ultrafine powder coatings has expanded in recent years, leading to an increase in the proportion of ultrafine powders such as titanium dioxide and barium sulfate in the formulations. Consequently, the proportion of particles <10μm in the exhaust gas has also increased. However, existing wet scrubbers only have one wet treatment stage, resulting in low classification efficiency for particles smaller than 10μm. The emission concentration often fails to consistently meet the requirements of the "Emission Standard for Air Pollutants in the Coating Industry". If a second wet scrubber is connected in series, additional land, circulating pumps, wastewater treatment, and antifreeze insulation facilities are required, significantly increasing both the initial investment and long-term operating costs. To address these issues, the following structure has been invented.
[0021] like Figures 1-10 The pollutant treatment device in a powder coating production process shown includes a semi-circular dust collection tank 1. A fan 5 is installed at the top of the inner side of the dust collection tank 1. An air inlet pipe 6 is fixedly connected through the outer wall of the dust collection tank 1. An L-shaped upper arc plate 7 is fixedly connected to the inner side of the dust collection tank 1 relative to the position next to the air inlet pipe 6. An L-shaped lower arc plate 8 is fixedly connected to the side wall of the upper arc plate 7. An upper guide plate 9 is fixedly connected to the inner side of the dust collection tank 1 between the upper arc plate 7 and the lower arc plate 8. A semi-circular block 10 is fixedly connected to the bottom of the inner side of the dust collection tank 1, and the semi-circular block 10 is fixedly connected to the side wall of the upper arc plate 7, the lower arc plate 8, and the upper guide plate 9. Both the semicircular block 10 and the dust collector 1 have annular grooves 11 on their inner sides. An arc frame 12 is slidably connected to the inner side of the annular groove 11. An arc moving plate 21 is provided on the inner side of the arc frame 12. A vertical plate 13 is fixedly connected between the arc frames 12. An L-shaped sliding arc plate 14 is fixedly connected to the side wall of the vertical plate 13. A lower guide plate 15 is fixedly connected between the arc frame 12 and the vertical plate 13 and the sliding arc plate 14. Both sides of the lower guide plate 15 and the sliding arc plate 14 are fixedly connected to the arc frame 12. A rotating mechanism for driving the arc frame 12 to rotate is also provided. A baffle plate 16 is provided next to the vertical plate 13. An air discharge gap is left between the top of the upper guide plate 9 and the inner side of the lower arc plate 8, and an air discharge gap is left between the top of the lower guide plate 15 and the inner side of the sliding arc plate 14. The dust collector 1 is filled with water, and there is a gap between the bottom of the vertical plate 13 and the bottom of the dust collector 1. When the wet dust collector is working, the water level must be 30mm above the lower edge of the upper guide plate 9 and the lower guide plate 15 (the upper guide plate 9 and the lower guide plate 15 are the same size), and water must always overflow from the overflow port to form a complete water film and prevent airflow short circuit. If the liquid level is lower than the lower edge of the guide plate, the dust removal efficiency will drop sharply and secondary dust will be generated. A sludge hopper 2 is fixedly connected to the front side of the dust collector 1. Sludge outlets 3 are opened at both ends of the bottom front side of the dust collector 1. An exhaust pipe 4 is fixedly connected through the top of the dust collector 1. The dust collection tank 1 mainly utilizes the negative pressure of the fan 5 to draw air, creating a pressure difference inside the machine. The water level slowly drops, which is like blowing air into water, causing water droplets to splash. Dust-laden air also enters through the air inlet pipe 6 and then passes through the gap between the upper arc plate 7 and the upper guide plate 9. The dust is enveloped, moistened, and increased in weight by the splashed water droplets, and then sinks to the bottom of the water. The purified gas is discharged through the gap between the upper guide plate 9 and the lower arc plate 8, and then discharged from the exhaust pipe 4 after passing through the dehumidifier at the top of the dust collection tank 1 for demisting. The entire process does not require a water pump or nozzle, nor any filter consumables. Only the bottom mud needs to be discharged periodically and the floating objects in the sewage hopper 2 need to be retrieved.
[0022] The rotating mechanism includes a rotary motor 17. A semi-circular frame 18 is fixedly connected to the front side of the dust collection tank 1, and a rotating rod 19 is rotatably connected between the bottom end of the semi-circular frame 18 and the top end of the semi-circular block 10. The side end of the rotating rod 19 is fixedly connected to the outer wall of one of the arc-shaped frames 12. The rotary motor 17 is fixedly connected to the bottom end of the semi-circular frame 18. The output end of the rotary motor 17 passes through the bottom end of the semi-circular frame 18 and is fixedly connected to the top end of the rotating rod 19. The output end of the rotary motor 17 is sealed and rotatably connected to the semi-circular frame 18. The side walls of the arc-shaped frame 12 are each provided with an upper sealing strip 20. The arc-shaped moving plate 21 is fixedly connected between the upper sealing strip 20 and the partition plate 16. The upper sealing strip 20 not only limits the position of the arc-shaped moving plate 21, allowing the arc-shaped moving plate 21 and the partition plate 16 to move when the arc-shaped frame 12 is reset, but also ensures the sealing performance between the arc-shaped frame 12, the arc-shaped moving plate 21, and the annular groove 11 by squeezing the upper sealing strip 20 after the arc-shaped frame 12 is fully reset. The arc-shaped moving plate 21 is also slidably connected to the inside of the arc-shaped frame 12 (it should be noted that slidably connecting the arc-shaped moving plate 21 to the inside of the arc-shaped frame 12 here can prevent dust-laden gas from entering from exiting through the inner side of the arc-shaped frame 12). The gas is discharged directly inside the arc frame 12 and is connected by a sealed sliding connection (a telescopic sleeve can be used). The side wall of the baffle plate 16 is provided with a telescopic groove 22. An adjusting plate 23 is longitudinally slidably connected inside the telescopic groove 22 (it should be noted that the adjusting plate 23 is sealed and slidably connected inside the telescopic groove 22 to ensure that the dust-laden gas entering will not be discharged from the telescopic groove 22). Several return springs 24 are fixedly connected between the top of the adjusting plate 23 and the top of the telescopic groove 22. The side wall of the adjusting plate 23 is provided with a squeezing groove 25. The top of the squeezing groove 25 is inclined. The top of the lower arc plate 8 is fixedly connected with a fixing rod 26, and the side wall of the fixing rod 26 is fixedly connected with a right-angle block 27 with an arc-shaped inclined surface. A pair of lower sealing strips 28 are fixedly connected to the side wall of the baffle plate 16, and a sealing sheet 29 is fixedly connected to the side wall of the lower arc plate 8. By setting the lower sealing strips 28 and sealing sheet 29, the sealing performance after the baffle plate 16 and the lower arc plate 8 are connected can be increased, and dust-laden gas is prevented from being discharged from the gap between the two, thus affecting the dust removal effect of the device. When producing powder coatings with high dust content, and it is necessary to adjust the dust collector's processing flow, firstly, control the fan 5 to increase the suction speed, and at the same time control the rotary motor 17 to start and drive the rotating rod 19 to rotate, which in turn drives the arc frame 12 to rotate and slide in the annular groove 11. At the same time, it drives the vertical plate 13, the sliding arc plate 14 and the lower guide plate 15 to move. Then, it drives the side of the arc frame 12 to move to the side of the partition plate 16, which in turn pushes the partition plate 16 to move together, and drives the arc moving plate 21 and the upper sealing strip 20 to move. Then, it drives the partition plate 16 to move to the side of the lower arc plate 8, and squeezes the lower sealing strip 28 and the sealing sheet 29. During this process, the adjusting plate 23 on the baffle plate 16 will move to the right-angle block 27, which will then insert the right-angle block 27 into the extrusion groove 25. Since the adjusting plate 23 can only slide longitudinally on the baffle plate 16, the right-angle block 27's arc-shaped inclined surface pushes the top inclined surface of the extrusion groove 25, causing the adjusting plate 23 to slide upward in the telescopic groove 22. At the same time, the return spring 24 is gradually compressed, thereby releasing the blockage on the bottom of the baffle plate 16 where the water surface is exposed, achieving a sealed connection between the two treatment structures. Subsequently, the dust-laden gas, after being wet-treated by the upper guide plate 9, enters the vertical plate 13 and the lower guide plate through the outlet below the adjusting plate 23. The wet treatment between 15 is finally discharged through the gap between the lower guide plate 15 and the sliding arc plate 14, thereby increasing the contact time between the dust-laden gas and the water droplets, ensuring the treatment effect of high dust-laden gas. If the content of the dust-laden gas is low, the rotary motor 17 can be controlled to reverse and repeat the above operation in the opposite direction. (It should be noted that when the arc frame 12 is reset, the arc moving plate 21 and the partition plate 16 will not be pulled to move immediately. Only when the arc frame 12 moves to the side of the upper sealing strip 20 can the upper sealing strip 20, the partition plate 16 and the arc moving plate 21 be pulled to move and reset, thereby ensuring the distance between the vertical plate 13 and the partition plate 16 after reset).
[0023] In summary, the above structural design allows for flexible adjustment of the pollutant treatment process based on the powder coating production process. This enables not only single-stage wet treatment of dusty gases during powder coating production, but also rapid adjustment of the positions of structures such as the sliding arc plate 14 and vertical plate 13 when producing powder coatings with high dust levels. This allows for quick sealing and combination of two wet treatment stages, increasing the contact time between the dusty air and the splashing water, thus ensuring the dust treatment effect of the device.
[0024] Based on the above embodiments, it was found during use that some powder coating manufacturers do not frequently produce powder coatings with high powder content. In this case, the secondary dust removal structure is rather wasteful. However, these manufacturers may have a need to expand the dust collection area, which would require the purchase of new dust collectors, increasing production costs and space requirements. To solve the above problems, further improvements were made to the above structure.
[0025] An installation port 30 is provided through the side wall of the outer arc-shaped movable plate 21 between the vertical plate 13 and the partition plate 16. An upper sealing plate 31 is installed on the installation port 30 by bolts. An installation joint 32 is fixedly connected through the outer wall of the dust collection tank 1 to the side of the upper sealing plate 31. A lower sealing plate 33 is installed on the installation joint 32 by bolts. An expansion mechanism for expanding the dust collection system is also provided. The expansion mechanism includes an L-shaped upper baffle 34 and an expansion connector 35. The upper baffle 34 is inclined on both sides. During expansion installation, the upper sealing plate 31 and the lower sealing plate 33 are removed. Then, the upper baffle 34 is inserted into the installation connector 32 and tightly inserted between the vertical plate 13 and the partition plate 16. The upper baffle 34 is then installed on the installation port 30 with bolts for sealing. A protruding connecting strip 36 is fixedly connected to the bottom of the connection end of the expansion connector 35. Finally, the expansion connector 35 is installed on the installation port 30 and the side wall of the upper baffle 34 with bolts for sealing. Rubber pads 37 are fixedly connected to the inclined surfaces on both sides of the upper baffle 34. When the user does not frequently use the secondary wet dust removal structure composed of the sliding arc plate 14 and the lower guide plate 15, and needs to expand the dust collection position of the powder coating production line, first stop the equipment, then install the dust collection head, and then use tools to remove the bolts on the lower sealing plate 33 and take out the lower sealing plate 33. Next, remove the bolts on the upper sealing plate 31 and take out the upper sealing plate 31. Then take out the upper baffle 34 and insert the upper baffle 34 between the vertical plate 13 and the partition plate 16 through the mounting joint 32. The side is inclined, and the distance between the vertical plate 13 and the partition plate 16 is gradually reduced. Therefore, after the upper baffle 34 is inserted, the rubber pad 37 can be tightly squeezed between the vertical plate 13 and the partition plate 16 (it should be noted that the installation position of the upper baffle 34 is below the extrusion groove 25). Then, the upper baffle 34 is installed in the threaded groove where the original upper sealing plate 31 was installed by bolts (it should be noted that a sealing ring needs to be placed between the two during installation), thereby completing the quick sealing of the top between the vertical plate 13 and the partition plate 16. Finally, the expansion connector 35 can be removed and installed in the threaded grooves of the upper baffle 34 and the original upper sealing plate 31 using bolts (note that a sealing ring needs to be placed between the two during installation). Then, the expansion connector 35 is connected to the dust collection head through the pipe to complete the rapid expansion. After that, when the equipment is started, the exhaust speed of the fan 5 is increased to ensure the suction power of the added pipe. Then, during the dust collection process, the dust-laden gas will enter between the baffle plate 16 and the vertical plate 13 through the expansion connector 35. Then, the dust-laden gas is wetted at the lower guide plate 15. The dust is wrapped, moistened and increased in weight by the splashing water droplets and then sinks to the bottom of the water. The purified gas is discharged between the lower guide plate 15 and the sliding arc plate 14. Then, after passing through the dehumidifier at the top of the dust collector 1 for demisting, it is discharged from the exhaust pipe 4.
[0026] In summary, the above structural design allows for the rapid and sealed connection of the expanded pipeline to the second wet scrubbing structure when the powder coating production line needs to be expanded or additional dust collection points are required. Consequently, only the power of the blower 5 needs to be adjusted to quickly expand the powder coating production line without the need to add a new wet scrubbing unit, further improving the convenience of the device.
[0027] The foregoing has shown and described the basic principles, main features, and advantages of the present invention.
[0028] Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed.
Claims
1. A pollutant treatment device for a powder coating production process, characterized in that: The system includes a semi-circular dust collection tank (1), with a fan (5) installed at the top of the inner side of the dust collection tank (1). An air inlet pipe (6) is fixedly connected through the outer wall of the dust collection tank (1). An L-shaped upper arc plate (7) is fixedly connected to the inner side of the dust collection tank (1) relative to the position next to the air inlet pipe (6). An L-shaped lower arc plate (8) is fixedly connected to the side wall of the upper arc plate (7). An upper guide plate (9) is fixedly connected between the upper arc plate (7) and the lower arc plate (8) on the inner side of the dust collection tank (1). A semi-circular block (10) is fixedly connected to the bottom of the inner side of the dust collection tank (1). The semi-circular block (10) and the inner side of the dust collection tank (1) are connected together. Each side is provided with an annular groove (11), and an arc frame (12) is slidably connected to the inner side of each annular groove (11). An arc moving plate (21) is provided to the inner side of each arc frame (12). A vertical plate (13) is fixedly connected between the arc frames (12). An L-shaped sliding arc plate (14) is fixedly connected to the side wall of the vertical plate (13). A lower guide plate (15) is fixedly connected between the arc frame (12) and the sliding arc plate (14) relative to the vertical plate (13). A rotating mechanism for driving the arc frame (12) to rotate is also provided. A baffle plate (16) is provided next to the vertical plate (13).
2. The pollutant treatment device for a powder coating production process according to claim 1, characterized in that: An air discharge gap is left between the top of the upper guide plate (9) and the inner side of the lower arc plate (8), an air discharge gap is left between the top of the lower guide plate (15) and the inner side of the sliding arc plate (14), the dust collector (1) is filled with water, and there is a gap between the bottom of the vertical plate (13) and the bottom of the dust collector (1).
3. The pollutant treatment device for a powder coating production process according to claim 1, characterized in that: The rotating mechanism includes a rotary motor (17), a semi-circular frame (18) is fixedly connected to the front side of the dust collector (1), and a rotating rod (19) is rotatably connected between the bottom end of the semi-circular frame (18) and the top end of the semi-circular block (10). The side end of the rotating rod (19) is fixedly connected to the outer wall of one of the arc-shaped frames (12). The rotary motor (17) is fixedly connected to the bottom end of the semi-circular frame (18). The output end of the rotary motor (17) passes through the bottom end of the semi-circular frame (18) and is fixedly connected to the top end of the rotating rod (19). The output end of the rotary motor (17) is sealed and rotatably connected to the semi-circular frame (18).
4. The pollutant treatment device for a powder coating production process according to claim 1, characterized in that: The sidewalls of the arc frame (12) are provided with upper sealing strips (20). The arc moving plate (21) is fixedly connected between the upper sealing strip (20) and the partition plate (16). The arc moving plate (21) is slidably connected to the inside of the arc frame (12). The sidewall of the partition plate (16) is provided with a telescopic groove (22). The inside of the telescopic groove (22) is longitudinally slidably connected with an adjustment plate (23). The top of the adjustment plate (23) and the top of the telescopic groove (22) are fixedly connected with several return springs (24). The sidewall of the adjustment plate (23) is provided with a squeezing groove (25). The top of the squeezing groove (25) is inclined. The top of the lower arc plate (8) is fixedly connected with a fixing rod (26). The sidewall of the fixing rod (26) is fixedly connected with a right-angle block (27) with an arc-shaped inclined surface.
5. A pollutant treatment device for a powder coating production process according to claim 4, characterized in that: A pair of lower sealing strips (28) are fixedly connected to the side wall of the partition plate (16), and a sealing sheet (29) is fixedly connected to the side wall of the lower arc plate (8).
6. A pollutant treatment device for a powder coating production process according to claim 1, characterized in that: The dust collector (1) is fixedly connected to the front side of the sludge hopper (2), and the bottom of the front side of the dust collector (1) is provided with sludge outlets (3) at both ends. The top of the dust collector (1) is fixedly connected to the exhaust pipe (4).
7. A pollutant treatment device for a powder coating production process according to claim 1, characterized in that: An installation port (30) is provided through the side wall of the arc-shaped movable plate (21) located on the outside, between the vertical plate (13) and the partition plate (16). An upper sealing plate (31) is installed on the installation port (30) by bolts. An installation joint (32) is fixedly connected through the outer wall of the dust collection tank (1) to the side of the upper sealing plate (31). A lower sealing plate (33) is installed on the installation joint (32) by bolts. An expansion mechanism for expanding the dust collection system is also provided.
8. A pollutant treatment device for a powder coating production process according to claim 7, characterized in that: The expansion mechanism includes an L-shaped upper baffle (34) and an expansion connector (35). The upper baffle (34) is inclined on both sides. During expansion installation, the upper sealing plate (31) and the lower sealing plate (33) are removed. Then, the upper baffle (34) is inserted into the installation connector (32) and tightly inserted between the vertical plate (13) and the partition plate (16). The upper baffle (34) is then installed on the installation port (30) with bolts. A protruding connecting strip (36) is fixedly connected to the bottom of the connection end of the expansion connector (35). Finally, the expansion connector (35) is installed on the installation port (30) and the side wall of the upper baffle (34) with bolts. Rubber pads (37) are fixedly connected to the inclined surfaces on both sides of the upper baffle (34).