An air filtration device for textile workshops

Abstract

This invention relates to the field of air purification equipment technology, and discloses an air filtration device for textile workshops, including a filter box and a mesh belt circulating within the filter box; an air inlet is provided on one side of the filter box; a negative pressure unit is provided in the internal cavity formed by the mesh belt, the negative pressure unit is used to generate negative pressure inside the filter box, guiding dust-laden air to be drawn in through the air inlet and pass through the front working area of ​​the mesh belt; a water circulation humidification mechanism is provided in the front working area of ​​the mesh belt for spraying and humidifying the dust and lint trapped on the mesh belt. By providing a thermal expansion peeling mechanism and a cleaning roller in the back working area of ​​the mesh belt, the moisture of the lint adhering to the surface of the mesh belt is heated and boiled, causing volume expansion, and then scraped off by the counter-rotating cleaning roller, avoiding the hardening and clogging of moist dust in the mesh belt pores, and improving the self-cleaning efficiency of the mesh belt.

Description

Technical Field

[0001] This invention relates to the field of air purification equipment technology, specifically to an air filtration device for textile workshops. Background Technology

[0002] Textile workshops generate large amounts of cotton lint, synthetic fiber fluff, and fine dust during production. To maintain environmental quality, air filtration equipment is typically used for centralized purification of dusty air. Existing dust removal equipment mostly employs static dry filters to physically intercept the fluff and dust. However, due to the large volume and tendency of fluff to entangle in textile workshops, static filters quickly become completely covered by fluff. This clogging phenomenon leads to a rapid increase in air resistance during equipment operation, resulting in a decrease in air permeability and filtration efficiency. The accumulation of large amounts of dry fluff inside the filter housing poses a significant fire hazard should static sparks come into contact with it. Furthermore, static filters lack self-cleaning capabilities, requiring frequent shutdowns and manual cleaning, severely impacting the continuity of production.

[0003] To reduce the fire hazard posed by dry, airborne fluff and control the dispersion of fine dust, some filtration equipment has incorporated water spray systems for wet dust removal, using circulating mesh belts instead of static filters. Fluff and dust in the airflow form a viscous mixture after being moistened by the water mist. While the water curtain effectively reduces safety risks, this mixture adheres tightly to the surface and pores of the mesh belt. Existing equipment typically relies solely on mechanical scrapers or brushes for surface cleaning, which is insufficient to completely remove this moist and firmly adhering mixture. As the equipment continues to operate, the mixture remaining in the mesh belt pores gradually dries and hardens under the influence of airflow, eventually causing complete blockage. This also increases the equipment's operating resistance, leaving the equipment still requiring manual disassembly and maintenance. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an air filtration device for textile workshops, which solves the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: an air filtration device for textile workshops, comprising a filter box and a mesh belt that circulates within the filter box;

[0006] An air inlet is provided on one side of the filter housing;

[0007] A negative pressure unit is installed in the internal cavity formed by the mesh belt. The negative pressure unit is used to generate negative pressure inside the filter box, guiding the dust-laden air to be drawn in through the air inlet and pass through the front working area of ​​the mesh belt.

[0008] The front working area of ​​the mesh belt is equipped with a water circulation humidification mechanism, which is used to spray and humidify the dust and flying fluff intercepted on the mesh belt.

[0009] The back working area of ​​the mesh belt is equipped with a thermal expansion peeling mechanism for heating the flying fluff attached to the mesh belt;

[0010] A cleaning roller is provided on the back working area of ​​the mesh belt and below the thermal expansion stripping mechanism to scrape the flying fluff off the mesh belt.

[0011] Preferably, the thermal expansion stripping mechanism includes an electromagnetic induction heater, which is disposed on the back side of the mesh belt and is used to inductively heat the mesh belt body to generate water vapor.

[0012] Preferably, the system further includes a steam reflux pretreatment system, which includes an exhaust hood and an infrared heating tube. The exhaust hood is positioned directly above the top of the mesh belt, and a negative pressure fan is installed on the exhaust hood. The infrared heating tube is installed inside the exhaust hood to radiate heat to the surface of the mesh belt, and the negative pressure fan is used to draw water vapor upwards.

[0013] Preferably, the steam reflux pretreatment system further includes a reflux channel, a reflux pipe, and a movable hood. The top of the air inlet is provided with an opening, and the air inlet is an openable structure. The exhaust end of the exhaust hood is connected to the reflux channel and the reflux pipe in sequence. The movable hood is slidably disposed at the end of the reflux pipe, and the movable hood is connected to the opening at the top of the air inlet. The movable hood is configured to slide upward along the reflux pipe.

[0014] Preferably, it also includes a baffle, which is inclinedly disposed in the back working area of ​​the mesh belt between the thermal expansion stripping mechanism and the cleaning roller, and a gap is left between the baffle and the surface of the mesh belt, the baffle being used to block airflow.

[0015] Preferably, the water circulation humidification mechanism includes an atomizing nozzle assembly, a guide plate, a return water tank, a water pump, and a return water pipe. There are two guide plates, and the atomizing nozzle assembly is located above the middle of the two guide plates. The spray end of the atomizing nozzle assembly faces the space between the two guide plates. The water pump is located inside the return water tank, and the output end of the water pump is connected to the atomizing nozzle assembly through the return water pipe.

[0016] Preferably, it further includes a V-shaped water tank disposed at the bottom of the filter box, the V-shaped water tank being located directly below the mesh belt, the return water tank being disposed outside the filter box, and an opening penetrating the side wall of the filter box being formed between the return water tank and the V-shaped water tank, a flexible filter screen being inserted into the opening, the flexible filter screen being used to filter the water flow entering the return water tank from the V-shaped water tank.

[0017] Preferably, an auger is installed inside the bottom of the V-shaped water tank. One end of the auger is connected to a drive assembly, and the other end of the auger extends to the outside of the filter box and is placed inside the waste bin. The auger is used to push the dust located at the bottom of the V-shaped water tank into the waste bin, and the bottom of the waste bin is lower than the bottom of the V-shaped water tank.

[0018] Preferably, two shafts are inserted into the internal cavity of the mesh belt, and two drive wheels are installed on each shaft. The mesh belt is sleeved on the outside of the drive wheels. A cover is fixed to the outside of the filter box. A geared motor is installed on the outside of the cover. The output end of the geared motor passes through the cover and is connected to one of the shafts. A drive sprocket is installed at the connection between the geared motor and the shaft. A driven sprocket is installed at one end of the cleaning roller. A chain is sleeved on the outside of the drive sprocket and the driven sprocket. The drive sprocket, the driven sprocket, and the chain are all located inside the cover.

[0019] Preferably, both sides of the negative pressure unit are connected to exhaust pipes, which penetrate and extend to the outside of the filter housing. The exhaust pipes are used to guide the air discharged by the negative pressure unit to the outside of the filter housing.

[0020] This invention provides an air filtration device for textile workshops. It has the following beneficial effects:

[0021] 1. This invention utilizes a thermal expansion peeling mechanism and a cleaning roller in the working area on the back of the conveyor belt. An electromagnetic induction heater directly heats the metal conveyor belt body, causing the moisture adhering to the surface of the conveyor belt to boil and expand in volume. The vaporization and expansion of the moisture reduces the physical adhesion between the dust and the surface of the conveyor belt from the bottom, loosening the originally adhered dust. Subsequently, the cleaning roller rotates in the opposite direction to scrape it off. This structure avoids the hardening and clogging of moist dust in the pores of the conveyor belt, thus improving the self-cleaning efficiency of the conveyor belt.

[0022] 2. This invention utilizes an exhaust hood and a negative pressure fan to collect water vapor generated on the surface of the heated mesh belt. The water vapor is then guided to the air inlet through a return channel and return pipe, where it mixes with the inhaled dry, dusty air. The water vapor condenses on the surface of the cold dust particles, neutralizing the static electricity of the dust and causing the agglomeration of fine dust particles through the adhesion of water molecules. The recovered water vapor completes the pre-wetting treatment of the dust, reducing the probability of fine dust penetrating the mesh belt and improving the interception effect of the water curtain spray system.

[0023] 3. The sewage discharge and transmission components of this invention adopt an internal and external physical isolation layout. A V-shaped water tank containing an auger is set at the bottom. The auger pushes the settled dust horizontally into the waste bin outside the filter box to complete the slag discharge. The filtered water flows through the flexible filter screen and enters the external return water tank for water pump circulation. The reduction motor and sprocket transmission components that drive the cleaning roller and mesh belt are all enclosed in the external casing. This structure avoids the wear of the water pump and mechanical transmission components by the dust-laden airflow and sludge, ensuring the stability of continuous operation of the device. Attached Figure Description

[0024] Figure 1 This is a left perspective view of the present invention;

[0025] Figure 2 This is a right-side perspective view of the present invention;

[0026] Figure 3 This is a schematic diagram showing the front view of the internal mesh belt of the filter housing of the present invention;

[0027] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0028] Figure 5 This is a schematic diagram illustrating the structure of the back of the internal mesh belt of the filter housing of the present invention;

[0029] Figure 6 for Figure 5 Enlarged view of point B in the middle;

[0030] Figure 7 This is a schematic diagram showing a partial structure of the bottom layer of the filter housing of the present invention;

[0031] Figure 8 This is a schematic diagram showing the gas flow during the operation of the device of the present invention.

[0032] The components include: 1. Filter box; 2. Cover; 3. Gear motor; 4. Shaft; 5. Drive wheel; 6. Mesh belt; 7. Negative pressure main unit; 8. Exhaust pipe; 9. Air inlet; 10. Atomizing nozzle assembly; 11. Guide plate; 12. Exhaust top cover; 13. Infrared heating tube; 14. Return channel; 15. Return pipe; 16. Movable cover; 17. Electromagnetic induction heater; 18. Cleaning roller; 19. Baffle; 20. Drive sprocket; 21. Drive sprocket; 22. V-shaped water tank; 23. Screwdriver; 24. Waste bin; 25. Drive assembly; 26. Return water tank; 27. Water pump; 28. Return water pipe; 29. ​​Flexible filter screen. Detailed Implementation

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see the appendix Figure 1 - Appendix Figure 8 This invention provides an air filtration device for textile workshops, including a filter housing 1 and a mesh belt 6 circulating inside the filter housing 1. An air inlet 9 is provided on one side of the filter housing 1. A negative pressure host 7 is provided in the internal cavity formed by the mesh belt 6. When the negative pressure host 7 is running, it generates negative pressure inside the filter housing 1, guiding dust-laden air to be drawn in through the air inlet 9 and pass through the front working area of ​​the mesh belt 6. When the air passes through the mesh belt 6, the dust and lint in it are trapped on the outer surface of the mesh belt 6. Both output ends of the negative pressure host 7 are connected to exhaust pipes 8, which penetrate and extend to the outside of the filter housing 1. The exhaust pipes 8 are used to guide the clean air discharged by the negative pressure host 7 to the outside of the filter housing 1 for dispersion, thereby achieving separation of the intake airflow path and the exhaust airflow path.

[0035] The front working area of ​​the mesh belt 6 is equipped with a water circulation humidification mechanism. The water circulation humidification mechanism is used to spray and humidify the dust and fluff intercepted on the mesh belt 6. The water circulation humidification mechanism includes an atomizing nozzle group 10, a guide plate 11, a return water tank 26, a water pump 27, and a return water pipe 28. There are two guide plates 11. The atomizing nozzle group 10 is located above the middle of the two guide plates 11, and the spray end of the atomizing nozzle group 10 faces the space between the two guide plates 11. The water pump 27 is located in the return water tank 26. The output end of the water pump 27 is connected to the atomizing nozzle group 10 through the return water pipe 28. The water pump 27 delivers water to the atomizing nozzle group 10. The atomizing nozzle group 10 sprays water mist between the two guide plates 11 to form a water curtain. When the dust and fluff pass through the water curtain under negative pressure, they come into contact with the water, increase their weight, and adhere to the mesh belt 6.

[0036] A thermal expansion peeling mechanism is provided on the back working area of ​​the mesh belt 6 to heat the fluff adhering to the mesh belt 6. The thermal expansion peeling mechanism includes an electromagnetic induction heater 17, which is located on the back of the mesh belt 6 and is used to inductively heat the mesh belt 6 body. When the mesh belt 6 carrying wet fluff runs to the back working area, the electromagnetic induction heater 17 rapidly heats up the metal mesh belt 6 body. The moisture adhering to the surface of the mesh belt 6 boils and generates water vapor. The volume expansion caused by the vaporization of the moisture acts on the bottom of the fluff, reducing the physical adhesion between the fluff and the mesh belt 6, causing the fluff to loosen.

[0037] A cleaning roller 18 is provided on the back working area of ​​the mesh belt 6 and below the thermal expansion stripping mechanism. The cleaning roller 18 rotates to scrape the loosened fluff off the mesh belt 6. A baffle 19 is inclinedly provided on the back working area of ​​the mesh belt 6 between the thermal expansion stripping mechanism and the cleaning roller 18. A gap is left between the baffle 19 and the surface of the mesh belt 6. The baffle 19 is used to block the airflow generated above the inside of the filter box 1 from extending downward, preventing the loose fluff from deviating from its falling trajectory due to airflow interference, and ensuring that the fluff falls to the bottom under the action of gravity and the cleaning roller 18.

[0038] A steam reflux pretreatment system is installed on the top of the filter box 1. The steam reflux pretreatment system includes an exhaust top cover 12 and an infrared heating tube 13. The exhaust top cover 12 is located directly above the top of the mesh belt 6. A negative pressure fan is installed on the exhaust top cover 12. The infrared heating tube 13 is installed inside the exhaust top cover 12 to radiate heat to the surface of the mesh belt 6, so that the residual moisture on the surface of the mesh belt 6 evaporates. The negative pressure fan runs and draws the generated water vapor upward.

[0039] The steam reflux pretreatment system also includes a reflux channel 14, a reflux pipe 15, and a movable hood 16. The exhaust end of the exhaust hood 12 is connected to the reflux channel 14 and the reflux pipe 15 in sequence. The top of the air inlet 9 is provided with an opening. The air inlet 9 is an openable structure. The movable hood 16 is slidably disposed at the end of the reflux pipe 15 and is connected to the opening at the top of the air inlet 9. The movable hood 16 is configured to slide upward along the reflux pipe 15. When it is necessary to open the air inlet 9 for internal maintenance, the movable hood 16 is slid upward to provide operating space. The sucked water vapor is introduced into the air inlet 9 through the reflux pipe 15 and mixed with the dry dust-laden air sucked in from the outside. The water vapor condenses on the surface of the dry dust, performing electrostatic neutralization and preliminary wetting and agglomeration of the dust.

[0040] A V-shaped water tank 22 is located directly below the mesh belt 6 at the bottom of the filter box 1. Water flowing down from the front of the mesh belt 6 and dust scraped off from the back fall into the V-shaped water tank 22. A return water tank 26 is located outside the filter box 1. An opening penetrating the side wall of the filter box 1 is provided between the return water tank 26 and the V-shaped water tank 22. A flexible filter screen 29 is inserted into this opening. The flexible filter screen 29 is used to filter the water flowing into the return water tank 26 from the V-shaped water tank 22, intercepting solid impurities and keeping the water flowing into the return water tank 26 clean, which facilitates the continuous circulation and extraction by the water pump 27.

[0041] An auger 23 is installed inside the bottom of the V-shaped water tank 22. One end of the auger 23 is connected to a drive assembly 25, and the other end of the auger 23 extends to the outside of the filter box 1 and is placed inside the waste bin 24. The bottom of the waste bin 24 is lower than the bottom of the V-shaped water tank 22. The drive assembly 25 drives the auger 23 to rotate, and the auger 23 pushes the dust and lint settled at the bottom of the V-shaped water tank 22 to the outside, so that it falls into the waste bin 24 for unified collection.

[0042] Two shafts 4 are inserted into the internal cavity of the mesh belt 6. Two drive wheels 5 are installed on each shaft 4. The mesh belt 6 is sleeved on the outside of the drive wheels 5. A cover 2 is fixed to the outside of the filter box 1. A geared motor 3 is installed on the outside of the cover 2. The output end of the geared motor 3 is inserted into the cover 2 and connected to one of the shafts 4. A drive sprocket 20 is installed at the connection between the geared motor 3 and the shaft 4. A driven sprocket 21 is installed at one end of the cleaning roller 18. A chain is sleeved on the outside of the drive sprocket 20 and the driven sprocket 21. While the geared motor 3 drives the shaft 4 to rotate, it drives the cleaning roller 18 to rotate synchronously through the chain. The drive sprocket 20, the driven sprocket 21 and the chain are all located inside the cover 2, isolated from the dust environment inside the filter box 1, to ensure the operational stability of the transmission components.

[0043] Working principle: First, start the negative pressure host 7, water pump 27, geared motor 3, negative pressure fan and drive assembly 25. The output end of geared motor 3 drives a shaft 4 to rotate. The shaft 4 drives the mesh belt 6 to circulate in the filter box 1 through the drive wheel 5. At the same time, the geared motor 3 drives the cleaning roller 18 to rotate synchronously through the drive sprocket 20, chain and driven sprocket 21. The drive sprocket 20, driven sprocket 21 and chain are all set inside the cover 2 to isolate the transmission process from the internal environment of the filter box 1.

[0044] The negative pressure host 7 operates in the internal cavity formed by the mesh belt 6 to generate negative pressure. The dust-laden air in the workshop is guided by the negative pressure and drawn into the filter box 1 through the air inlet 9. At this time, the steam reflux pretreatment system transports the generated water vapor to the movable hood 16 through the reflux channel 14 and reflux pipe 15, and enters the interior of the air inlet 9 through the opening. The water vapor mixes with the drawn-in dust-laden air, and water molecules condense on the surface of the dry dust to pre-wet the dust.

[0045] The pre-treated dusty air moves towards the front working area of ​​the mesh belt 6. The water pump 27 delivers water from the return water tank 26 to the atomizing nozzle group 10 through the return water pipe 28. The atomizing nozzle group 10 sprays a water curtain downward in the space between the two guide plates 11. The dusty air passes through the water curtain and comes into contact with the mesh belt 6. After the dust and fluff come into contact with the water, they are trapped on the outer surface of the mesh belt 6. The filtered air enters the internal cavity of the mesh belt 6 and is then guided to the outside of the filter box 1 by the exhaust pipe 8 and discharged.

[0046] The mesh belt 6, covered with moist dust, moves downwards with the drive wheel 5 to the back working area. The electromagnetic induction heater 17 induction heats the mesh belt 6 body. The moisture on the surface of the mesh belt 6 boils and expands in volume, reducing the adhesion between the dust and the mesh belt 6. The inclined baffle 19 blocks the airflow inside and above, keeping the loose dust in a downward trend. Then, the cleaning roller 18, which rotates in the opposite direction, contacts the surface of the mesh belt 6 and scrapes off the dust.

[0047] After the dust is scraped off, the mesh belt 6 continues to run to the top area. The infrared heating tube 13 radiates heat to the surface of the mesh belt 6, evaporating the residual moisture on the surface of the mesh belt 6. The negative pressure fan on the exhaust top cover 12 draws the generated water vapor upward and puts it into the return channel 14 for circulation. During the equipment maintenance stage, the operator slides the movable cover 16 upward along the return pipe 15 and opens the air inlet 9 for internal cleaning.

[0048] The water flow generated by the front washing of the mesh belt 6 and the dust scraped off from the back are all collected in the V-shaped water pool 22 at the bottom of the filter box 1. The dust settles at the bottom of the V-shaped water pool 22. The drive component 25 drives the auger 23 to rotate. The auger 23 pushes the dust at the bottom of the V-shaped water pool 22 outward, so that it falls directly into the waste bin 24. The water flow in the V-shaped water pool 22 passes through the flexible filter screen 29 and enters the outer return water tank 26. The water supply pump 27 draws it out again for circulation.

Claims

1. An air filtration device for textile workshops, characterized in that, Includes a filter housing (1) and a mesh belt (6) that circulates within the filter housing (1); An air inlet (9) is provided on one side of the filter box (1). A negative pressure host (7) is provided in the internal cavity formed by the mesh belt (6). The negative pressure host (7) is used to generate negative pressure inside the filter box (1) to guide dust-laden air to be drawn in from the air inlet (9) and pass through the front working area of ​​the mesh belt (6). The front working area of ​​the mesh belt (6) is equipped with a water circulation humidification mechanism for spraying and humidifying the dust and fluff intercepted on the mesh belt (6); The back working area of ​​the mesh belt (6) is equipped with a thermal expansion peeling mechanism for heating the flying fluff attached to the mesh belt (6); A cleaning roller (18) is provided on the back working area of ​​the mesh belt (6) and below the thermal expansion stripping mechanism for scraping off flying fluff from the mesh belt (6).

2. The air filtration device for textile workshops according to claim 1, characterized in that, The thermal expansion stripping mechanism includes an electromagnetic induction heater (17), which is disposed on the back of the mesh belt (6) and is used to induction heat the mesh belt (6) body to generate water vapor.

3. An air filtration device for textile workshops according to claim 1, characterized in that, It also includes a steam reflux pretreatment system, which includes an exhaust hood (12) and an infrared heating tube (13). The exhaust hood (12) is located directly above the top of the mesh belt (6). A negative pressure fan is installed on the exhaust hood (12). The infrared heating tube (13) is installed inside the exhaust hood (12) to radiate heat to the surface of the mesh belt (6). The negative pressure fan is used to draw water vapor upward.

4. An air filtration device for textile workshops according to claim 3, characterized in that, The steam reflux pretreatment system further includes a reflux channel (14), a reflux pipe (15), and a movable cover (16). The top of the air inlet (9) is provided with an opening. The air inlet (9) is an openable structure. The exhaust end of the exhaust cover (12) is connected to the reflux channel (14) and the reflux pipe (15) in sequence. The movable cover (16) is slidably disposed at the end of the reflux pipe (15), and the movable cover (16) is connected to the opening at the top of the air inlet (9). The movable cover (16) is configured to slide upward along the reflux pipe (15).

5. An air filtration device for textile workshops according to claim 1, characterized in that, It also includes a baffle (19), which is inclinedly disposed in the back working area of ​​the mesh belt (6) between the thermal expansion stripping mechanism and the cleaning roller (18), and a gap is left between the baffle (19) and the surface of the mesh belt (6), and the baffle (19) is used to block the airflow.

6. An air filtration device for textile workshops according to claim 1, characterized in that, The water circulation humidification mechanism includes an atomizing nozzle assembly (10), a guide plate (11), a return water tank (26), a water pump (27), and a return water pipe (28). There are two guide plates (11). The atomizing nozzle assembly (10) is located above the middle of the two guide plates (11). The spray end of the atomizing nozzle assembly (10) faces the space between the two guide plates (11). The water pump (27) is located inside the return water tank (26). The output end of the water pump (27) is connected to the atomizing nozzle assembly (10) through the return water pipe (28).

7. An air filtration device for textile workshops according to claim 6, characterized in that, It also includes a V-shaped water tank (22) located at the bottom of the filter box (1), the V-shaped water tank (22) being located directly below the mesh belt (6), the return water tank (26) being located outside the filter box (1), and an opening penetrating the side wall of the filter box (1) being provided between the return water tank (26) and the V-shaped water tank (22), a flexible filter screen (29) being inserted into the opening, the flexible filter screen (29) being used to filter the water flow entering the return water tank (26) from the V-shaped water tank (22).

8. An air filtration device for textile workshops according to claim 7, characterized in that, An auger (23) is installed inside the bottom of the V-shaped water tank (22). One end of the auger (23) is connected to a drive assembly (25). The other end of the auger (23) extends to the outside of the filter box (1) and is placed inside the waste bin (24). The auger (23) is used to push the dust located at the bottom of the V-shaped water tank (22) into the waste bin (24). The bottom of the waste bin (24) is lower than the bottom of the V-shaped water tank (22).

9. An air filtration device for textile workshops according to claim 1, characterized in that, Two shafts (4) are inserted into the internal cavity of the mesh belt (6). Two drive wheels (5) are installed on each shaft (4). The mesh belt (6) is sleeved on the outside of the drive wheels (5). A cover (2) is fixed to the outside of the filter box (1). A geared motor (3) is installed on the outside of the cover (2). The output end of the geared motor (3) is inserted into the cover (2) and connected to one of the shafts (4). A drive sprocket (20) is installed at the connection between the geared motor (3) and the shaft (4). A driven sprocket (21) is installed at one end of the cleaning roller (18). A chain is sleeved on the outside of the drive sprocket (20) and the driven sprocket (21). The drive sprocket (20), the driven sprocket (21) and the chain are all located inside the cover (2).

10. An air filtration device for textile workshops according to claim 1, characterized in that, Both sides of the negative pressure host (7) are connected to exhaust pipes (8). The exhaust pipes (8) penetrate and extend to the outside of the filter box (1). The exhaust pipes (8) are used to guide the air discharged by the negative pressure host (7) to the outside of the filter box (1).

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