A dust filtration device for a coal mill exhaust fan

Abstract

This utility model relates to the field of dust filtration technology for exhaust fans, specifically disclosing a dust filtration device for a coal mill exhaust fan. It includes a housing and a filter chamber within the housing. An air inlet chamber is provided within the housing and communicates with the filter chamber. Several sets of filter bags are arranged within the filter chamber, and several sets of striking rods are arranged between adjacent sets of filter bags. The striking rods are fixedly connected to a rotating rod, which is rotatably connected within the filter chamber. A drive assembly is provided within the air inlet chamber to drive the rotating rod. This utility model, by configuring a filter chamber, filter bags, striking rods, rotating rod, and drive assembly, allows the drive assembly to drive the rotating rod to swing, thereby causing the striking rods to strike the filter bags. This dislodges and collects the dust clogging the pores of the filter bags, reducing the likelihood of dust adhering to the filter bag surface and clogging the pores, thus minimizing the reduction in filtration efficiency and preventing disruption to the normal operation of the system.

Description

Technical Field

[0001] This utility model relates to the field of dust filtration technology for exhaust fans, specifically a dust filtration device for a coal mill exhaust fan. Background Technology

[0002] Dust filtration for coal mill exhaust fans is primarily aimed at ensuring production safety, extending equipment lifespan, and meeting environmental protection requirements. Coal mill systems generate a large amount of coal dust particles during the grinding of raw coal. Direct discharge through exhaust fans would not only cause environmental pollution but also pose a fire or explosion risk due to coal dust accumulation. Using dust filtration devices can effectively intercept coal dust, reduce emission concentrations, and ensure compliance with air pollutant emission standards.

[0003] The existing patent publication number CN215310963U discloses a filter bag with a dust filtration structure, including an inner support ring frame and a cross bracket. The inner filter cloth and the outer filter cloth of the filter bag cooperate to form a double-layer structure. Activated carbon filler is placed in the gap between the two to improve the basic filtration performance of the filter bag. The outer diameter of the inner support ring frame matches the inner diameter of the inner filter cloth. One end of the cross bracket, which passes through the outer wall of the inner support ring frame, is connected to the inner filter cloth. The support structure composed of the inner support ring frame and the cross bracket can provide lateral support for the inner filter cloth of the filter bag. The support structure can distribute stress and improve the stability of the installation of the inner and outer filter cloths.

[0004] During the gas filtration process of the above-mentioned device, some dust will gradually be adsorbed inside the filter bag. If it is not cleaned for a long time, this dust will continue to accumulate and block the pores of the filter bag, thus significantly reducing the filtration efficiency and affecting the normal operation of the system. In order to address the above problems, a dust filtration device for coal mill exhaust fans is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a dust filtration device for a coal mill exhaust fan to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A dust filtration device for a coal mill exhaust fan includes a housing and a filter chamber formed inside the housing. An air inlet chamber is formed inside the housing and communicates with the filter chamber. Several sets of filter bags are arranged inside the filter chamber. Several sets of striking rods are arranged between two adjacent sets of filter bags. Several sets of striking rods are fixedly connected to a set of rotating rods. The rotating rods are rotatably connected inside the filter chamber. A drive assembly for driving the rotating rods to rotate is provided inside the air inlet chamber.

[0008] The drive assembly includes a dust box and a gear. The dust box is fixedly connected to the air intake chamber, the gear is located inside the dust box, one end of the rotating rod extends into the air intake chamber, the gear is fixedly connected to the top of the rotating rod, the gear meshes with the gear plate, and the dust box is provided with an adjustment component for driving the gear plate to reciprocate.

[0009] A discharge hopper is fixedly connected to the bottom of the box, and the inner cavity of the discharge hopper is connected to the inner cavity of the filter chamber. A slag discharge assembly is installed inside the discharge hopper.

[0010] In one alternative embodiment: the adjusting component includes a moving block and a sliding block, the moving block being fixedly connected to the top of the toothed plate, the sliding block being slidably connected inside the moving block, a rotating plate being rotatably connected to the top of the sliding block, a fixed rod being fixedly connected to the top of the rotating plate, the fixed rod being rotatably connected to the top of the housing, and a rotating wheel being fixedly connected to the top of the fixed rod. The two sets of rotating wheels are connected by a synchronous belt, and a motor for driving one set of rotating wheels to rotate is installed on the support frame at the top of the housing.

[0011] In one alternative embodiment: the slag discharge assembly includes a support rod and a connecting rod. The support rod is rotatably connected to the bottom of the housing. Two sets of connecting rods are respectively fixedly connected to both sides of the support rod. A scraper is fixedly connected to the side of the connecting rod away from the support rod. The scraper slides against the inner wall of the discharge hopper. A handle is fixedly connected to the end of the support rod extending outside the discharge hopper. A sealing cover is fitted onto the support rod. The sealing cover is bolted to the discharge port of the discharge hopper.

[0012] In one alternative: an air inlet pipe is installed on one side of the housing, the air inlet pipe is connected to the inner cavity of the air inlet chamber, and air outlet pipes are fixedly connected to both sides of the housing, the inner cavities of both sets of air outlet pipes are connected to the inner cavity of the filter chamber.

[0013] In one alternative: a guide block is fixedly connected to the bottom of the toothed plate, and a guide groove is provided at the bottom of the inner wall of the dustproof box to facilitate the sliding of the guide block.

[0014] In one alternative: the inner cavity of the filter bag is connected to the inner cavity of the air inlet cavity, and the filter bag is located inside the filtration cavity.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention incorporates a filter chamber, filter bag, striking rods, rotating rod, and drive assembly. The drive assembly drives the rotating rod to swing, thereby causing several sets of striking rods to strike the filter bag, dislodging and collecting the dust clogging the pores of the filter bag. This reduces the likelihood of dust adhering to the surface of the filter bag and clogging the pores, thus minimizing the reduction in filtration efficiency and preventing disruption to the normal operation of the system.

[0017] This invention features a slag discharge assembly. By pulling down the sealing cover, it slides on the support rod. Then, by rotating the support rod, the scraper rotates inside the discharge hopper via two sets of connecting rods. This allows the dust inside the discharge hopper to be discharged, while reducing the accumulation of dust on the inner wall of the discharge hopper and preventing blockages. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the dustproof box in this utility model.

[0020] Figure 3 This is a schematic diagram of the structure where the filter bag is located in this utility model.

[0021] Figure 4 This is a structural diagram of the location of the guide block in this utility model.

[0022] In the diagram: 11. Housing; 12. Filter chamber; 13. Air inlet chamber; 14. Filter bag; 15. Beating rod; 16. Rotating rod; 17. Gear; 18. Toothed plate; 19. Moving block; 20. Sliding block; 21. Rotating plate; 22. Fixed rod; 23. Guide block; 24. Rotating wheel; 25. Dustproof box; 26. Air inlet pipe; 27. Air outlet pipe; 28. Discharge hopper; 29. ​​Support rod; 30. Scraper; 31. Connecting rod; 32. Sealing cover; 33. Motor. Detailed Implementation

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-4In this embodiment, a dust filtration device for a coal mill exhaust fan includes a housing 11 and a filter chamber 12 opened in the housing 11. An air inlet chamber 13 communicating with the filter chamber 12 is opened in the housing 11. A plurality of filter bags 14 are arranged in the filter chamber 12. A plurality of knocking rods 15 are arranged between two adjacent groups of filter bags 14. The plurality of knocking rods 15 are fixedly connected to a set of rotating rods 16. The rotating rods 16 are rotatably connected in the filter chamber 12. A drive assembly for driving the rotating rods 16 to rotate is arranged in the air inlet chamber 13.

[0026] The drive assembly includes a dustproof box 25 and a gear 17. The dustproof box 25 is fixedly connected to the air inlet chamber 13. The gear 17 is located inside the dustproof box 25. One end of the rotating rod 16 extends into the air inlet chamber 13. The gear 17 is fixedly connected to the top of the rotating rod 16. The gear 17 meshes with the toothed plate 18. The dustproof box 25 is provided with an adjusting component for driving the toothed plate 18 to reciprocate. The adjusting component drives the toothed plate 18 to move back and forth. The toothed plate 18 drives the guide block 23 to slide in the guide groove. The toothed plate 18 meshes with the gear 17 to drive the gear 17 to rotate in both directions. The gear 17 drives the rotating rod 16 to rotate, thereby driving several sets of striking rods 15 to swing and strike the filter bag 14. This causes the dust blocking the filter bag pores to fall off and enter the discharge hopper 28 for collection and discharge, reducing the situation where dust is adsorbed on the surface of the filter bag 14 and blocks the filter bag pores, thus reducing the filtration effect and avoiding affecting the normal operation of the system.

[0027] The bottom of the housing 11 is fixedly connected to a discharge hopper 28, the inner cavity of the discharge hopper 28 is connected to the inner cavity of the filter chamber 12, and a slag discharge assembly is provided inside the discharge hopper 28.

[0028] The adjusting component includes a movable block 19 and a sliding block 20. The movable block 19 is fixedly connected to the top of the toothed plate 18, and the sliding block 20 is slidably connected inside the movable block 19. A rotating plate 21 is rotatably connected to the top of the sliding block 20, and a fixed rod 22 is fixedly connected to the top of the rotating plate 21. The fixed rod 22 is rotatably connected to the top of the housing 11, and a rotating wheel 24 is fixedly connected to the top of the fixed rod 22. Two sets of rotating wheels 24 are connected by a synchronous belt. A drive mechanism for one set of rotating wheels is installed on the support frame at the top of the housing 11. The motor 33, which drives the rotating wheel 24, starts and drives a set of rotating wheels 24 to rotate. One set of rotating wheels 24 drives another set of rotating wheels 24 to rotate via a synchronous belt. The rotating wheels 24 drive the fixed rod 22 to rotate, and the fixed rod 22 drives the rotating plate 21 to rotate, thereby causing the sliding block 20 to slide in the moving block 19 and causing the moving block 19 to reciprocate. The moving block 19 drives the toothed plate 18 to move, and the toothed plate 18 drives the guide block 23 to slide in the guide groove, thereby driving the toothed plate 18 to reciprocate.

[0029] The slag discharge assembly includes a support rod 29 and a connecting rod 31. The support rod 29 is rotatably connected to the bottom of the housing 11. Two sets of connecting rods 31 are fixedly connected to both sides of the support rod 29. A scraper 30 is fixedly connected to the side of the connecting rod 31 away from the support rod 29. The scraper 30 slides against the inner wall of the discharge hopper 28. A handle is fixedly connected to the end of the support rod 29 extending outside the discharge hopper 28. A sealing cover 32 is sleeved on the support rod 29. The sealing cover 32 is bolted to the discharge port of the discharge hopper 28. First, remove the bolts on the sealing cover 32, remove the sealing cover 32, and then pull down the sealing cover 32 to slide it on the support rod 29. Then, rotate the support rod 29 to drive the scraper 30 to rotate inside the discharge hopper 28 through the two sets of connecting rods 31. This can discharge the dust inside the discharge hopper 28 and reduce the accumulation of dust on the inner wall of the discharge hopper 28, which can cause blockage.

[0030] An air inlet pipe 26 is installed on one side of the housing 11, and the air inlet pipe 26 is connected to the inner cavity of the air inlet chamber 13. Air outlet pipes 27 are fixedly connected to both sides of the housing 11. The inner cavities of the two sets of air outlet pipes 27 are connected to the inner cavity of the filter chamber 12. Gas enters the air inlet chamber 13 through the air inlet pipe 26, and then enters the filter chamber 12 through several sets of filter bags 14. The filter bags 14 filter the gas, and the filtered gas is discharged through the air outlet pipes 27.

[0031] The bottom of the toothed plate 18 is fixedly connected to a guide block 23, and the bottom of the inner wall of the dust box 25 is provided with a guide groove for sliding with the guide block 23. By setting the guide block 23 and the guide groove, the toothed plate 18 can be guided and limited.

[0032] The inner cavity of the filter bag 14 is connected to the inner cavity of the air inlet chamber 13. The filter bag 14 is located in the filtration chamber 12. Gas enters the air inlet chamber 13 through the air inlet pipe 26 and then enters the filter bag 14 for filtration.

[0033] The working principle of this utility model is as follows: During dust filtration, gas enters the inlet chamber 13 through the inlet pipe 26, and then enters the filtration chamber 12 through several sets of filter bags 14. The filter bags 14 filter the gas, and the filtered gas is discharged through the outlet pipe 27. The filtered dust enters the discharge hopper 28 through the filter bags 14. Using external tools, the bolts on the sealing cover 32 are rotated and removed. After removing the sealing cover 32, the sealing cover 32 is pulled down and slid on the support rod 29. Then, the support rod 29 is rotated, which drives the scraper 30 to rotate in the discharge hopper 28 through two sets of connecting rods 31. This can discharge the dust in the discharge hopper 28 and reduce the accumulation of dust on the inner wall of the discharge hopper 28, which can cause blockage. When cleaning the filter bag 14, the motor 33 starts, driving a set of rotating wheels 24 to rotate. One set of rotating wheels 24 drives another set of rotating wheels 24 to rotate via a synchronous belt. The rotating wheels 24 drive the fixed rod 22 to rotate, and the fixed rod 22 drives the rotating plate 21 to rotate, thereby causing the sliding block 20 to slide in the moving block 19 and causing the moving block 19 to reciprocate. The moving block 19 drives the toothed plate 18 to move, and the toothed plate 18 drives the guide block 23 to slide in the guide groove. The toothed plate 18 meshes with the gear 17, causing the gear 17 to rotate in both directions. The gear 17 drives the rotating rod 16 to rotate, thereby causing several sets of striking rollers 15 to swing and strike the filter bag 14, causing the dust blocking the filter bag pores to fall into the discharge hopper 28 for collection and discharge. This reduces the situation where dust is adsorbed on the surface of the filter bag 14 and blocks the filter bag pores, resulting in a decrease in filtration effect and avoiding affecting the normal operation of the system.

[0034] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A dust filtration device for a coal mill exhaust fan, comprising a housing (11) and a filter chamber (12) formed within the housing (11), characterized in that: The housing (11) has an air inlet chamber (13) that communicates with the filter chamber (12). The filter chamber (12) is provided with several sets of filter bags (14). Several sets of tapping rods (15) are provided between two adjacent sets of filter bags (14). Several sets of tapping rods (15) are fixedly connected to a set of rotating rods (16). The rotating rods (16) are rotatably connected to the filter chamber (12). The air inlet chamber (13) is provided with a drive assembly for driving the rotating rods (16) to rotate. The drive assembly includes a dust box (25) and a gear (17). The dust box (25) is fixedly connected to the air intake chamber (13). The gear (17) is located inside the dust box (25). One end of the rotating rod (16) extends into the air intake chamber (13). The gear (17) is fixedly connected to the top of the rotating rod (16). The gear (17) meshes with the toothed plate (18). The dust box (25) is provided with an adjusting component for driving the toothed plate (18) to reciprocate. The bottom of the box (11) is fixedly connected to a discharge hopper (28), the inner cavity of the discharge hopper (28) is connected to the inner cavity of the filter chamber (12), and a slag discharge assembly is provided in the discharge hopper (28).

2. The dust filtration device for a coal mill exhaust fan according to claim 1, characterized in that: The adjusting component includes a moving block (19) and a sliding block (20). The moving block (19) is fixedly connected to the top of the toothed plate (18), and the sliding block (20) is slidably connected inside the moving block (19). A rotating plate (21) is rotatably connected to the top of the sliding block (20), and a fixed rod (22) is fixedly connected to the top of the rotating plate (21). The fixed rod (22) is rotatably connected to the top of the housing (11), and a rotating wheel (24) is fixedly connected to the top of the fixed rod (22). The two sets of rotating wheels (24) are connected by a synchronous belt. A motor (33) for driving a set of rotating wheels (24) to rotate is installed on the support frame at the top of the housing (11).

3. The dust filtration device for a coal mill exhaust fan according to claim 1, characterized in that: The slag discharge assembly includes a support rod (29) and a connecting rod (31). The support rod (29) is rotatably connected to the bottom of the box (11). Two sets of connecting rods (31) are fixedly connected to both sides of the support rod (29). A scraper (30) is fixedly connected to the side of the connecting rod (31) away from the support rod (29). The scraper (30) slides with the inner wall of the discharge hopper (28). A handle is fixedly connected to the end of the support rod (29) extending outside the discharge hopper (28). A sealing cover (32) is sleeved on the support rod (29). The sealing cover (32) is bolted to the discharge port of the discharge hopper (28).

4. The dust filtration device for a coal mill exhaust fan according to claim 1, characterized in that: An air inlet pipe (26) is installed on one side of the housing (11), and the air inlet pipe (26) is connected to the inner cavity of the air inlet chamber (13). An air outlet pipe (27) is fixedly connected to both sides of the housing (11), and the inner cavities of the two sets of air outlet pipes (27) are connected to the inner cavity of the filter chamber (12).

5. The dust filtration device for a coal mill exhaust fan according to claim 1, characterized in that: The bottom of the toothed plate (18) is fixedly connected to a guide block (23), and the bottom of the inner wall of the dust box (25) is provided with a guide groove for sliding with the guide block (23).

6. The dust filtration device for a coal mill exhaust fan according to claim 1, characterized in that: The inner cavity of the filter bag (14) is connected to the inner cavity of the air inlet cavity (13), and the filter bag (14) is located in the filter cavity (12).

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