A coal dust filtering and collecting device for coal bed gas exploitation

Abstract

This utility model discloses a coal powder filtration and collection device for coalbed methane extraction, relating to the field of coal powder filtration technology. It includes a filter barrel containing a dust filter bag. When air carrying coal powder passes through the filter barrel, the dust filter bag filters the coal powder in the air. The air is then discharged through the filter barrel, completing the coal powder filtration. A recovery box is located at the lower end of the filter barrel to recover the filtered coal powder. While recovering the coal powder, the air inlet is sealed to prevent backflow. The filter barrel contains multi-angle adjustable blowers that blow air towards the dust filter bag, blowing the filtered coal powder off the filter bag for recovery. This utility model improves the filtration effect and recovery efficiency of coal powder, and does not cause coal powder leakage during operation and recovery.

Description

Technical Field

[0001] This utility model relates to the field of coal powder filtration technology, and in particular to a coal powder filtration and collection device for coalbed methane extraction. Background Technology

[0002] The collection of coal dust is crucial during coal mining, as it not only pollutes the mining environment but also poses safety hazards such as fires and explosions. When suspended in the air, coal dust easily mixes with oxygen, forming flammable and explosive gas mixtures, increasing the risk of accidents. Furthermore, the accumulation of coal dust can harm miners' health, leading to respiratory illnesses. Effective coal dust collection and control not only ensures mining safety and production efficiency but also reduces environmental pollution and protects miners' health.

[0003] Chinese utility model patent with publication number CN217094920U discloses a coal dust filtration and collection device for coal mining. This device scrapes the filter screen by setting an external up-and-down reciprocating motion to remove the coal dust from the filter screen. However, in the field of coal dust collection, cloth bags are often used for coal dust collection. Using a reciprocating sliding method to clean coal dust is inefficient and easily damages the cloth bag, thus reducing the coal dust filtration and collection efficiency. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model discloses a coal powder filtration and collection device for coalbed methane extraction.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a coal powder filtration and collection device for coalbed methane mining, including a filter barrel, with a filter barrel and an air outlet respectively arranged on both sides of the filter barrel, a dust filter bag and an installation ring arranged inside the filter barrel, the dust filter bag filtering the coal powder, a recovery box arranged at the lower end of the filter barrel for recovering the coal powder, two sets of adjustment frames slidably arranged on the installation ring, an adjustment frame rotatably arranged on the adjustment frame 1, a cleaning frame slidably arranged inside the adjustment frame 2, and a blower head arranged on the cleaning frame for blowing air towards the dust filter bag.

[0006] Furthermore, a placement box is provided on the side of the filter canister, and a baffle is slidably disposed inside the placement box to seal the air inlet.

[0007] Furthermore, an opening is provided at the connection position between the filter barrel and the recycling bin, and a sealing block is slidably disposed inside the filter barrel to seal the opening between the filter barrel and the recycling bin.

[0008] Furthermore, the filter bucket is provided with a placement slot, and the sealing block is inserted into the placement slot.

[0009] Furthermore, a recycling pipe is provided at the lower end of the recycling bin.

[0010] The advantages of this utility model compared with the prior art are: this utility model automatically filters coal dust, and blows the dust filter bag in reverse through multiple sets of blowers, blowing down the coal dust accumulated on the dust filter bag for collection. The position of the blowers can be adjusted in multiple directions, improving the cleaning efficiency of the blowers on the dust filter bag. At the same time, the air inlet is sealed to prevent coal dust from flying out through the air inlet and causing pollution. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0012] Figure 2 This is a front view of the overall structure of this utility model.

[0013] Figure 3 for Figure 2 Cross-sectional view of the structure along the AA direction.

[0014] Figure 4 This is a cross-sectional view of the placement box structure of this utility model.

[0015] Figure 5 This is a cross-sectional view of the filter barrel structure of this utility model.

[0016] Figure 6 This is a partial structural cross-sectional view of the recycling bin of this utility model.

[0017] Figure 7 This is a schematic diagram of the installation position of the mounting ring for the utility model.

[0018] Figure 8 for Figure 7 Cross-sectional view of the structure in the BB direction.

[0019] Figure 9 for Figure 8 Enlarged schematic diagram of the structure at point C.

[0020] Attached reference numerals: 1-Filter canister; 2-Air inlet; 3-Air outlet; 4-Recovery box; 5-Recovery pipe; 6-Placement box; 7-Dust filter bag; 8-Mounting ring; 9-Adjusting frame one; 10-Sealing block; 11-Baffle; 12-Gear one; 13-Gear two; 14-Gear three; 15-Placement slot; 16-Gear four; 17-Adjusting frame two; 18-Cleaning frame; 19-Blower head. Detailed Implementation

[0021] refer to Figures 1 to 9The device shown is a coal dust filtration and collection device for coalbed methane extraction. It includes a filter barrel 1, in which a dust filter bag 7 is installed to filter coal dust. Air containing coal dust is discharged from the filter barrel 1 after being filtered by the dust filter bag 7. The coal dust accumulates on the dust filter bag 7. A recovery box 4 for recovering coal dust is installed at the lower end of the filter barrel 1, and a sealing block 10 is installed between the filter barrel 1 and the recovery box 4 for blocking. The filter barrel 1 is also equipped with multiple sets of adjustable-angle blowers 19. The blowers 19 blow the coal dust on the dust filter bag 7 down into the recovery box 4, thus completing the filtration and collection of coal dust.

[0022] The filter barrel 1 has an air inlet 2 and an air outlet 3 on both sides. Air containing coal dust enters the filter barrel 1 through the air inlet 2, and after filtration, it exits the filter barrel 1 through the air outlet 3. A dust filter bag 7 is installed inside the filter barrel 1 near the air inlet 2. The dust filter bag 7 filters the coal dust in the air, and the coal dust accumulates on the side of the dust filter bag 7 facing the air inlet 2. A recovery box 4 is installed at the lower end of the filter barrel 1. Multiple sets of recovery pipes 5 are installed at the lower end of the recovery box 4. An opening is provided between the filter barrel 1 and the recovery box 4. A sealing block 10 is slidably installed inside the filter barrel 1. The sealing block 10 controls the opening between the filter barrel 1 and the recovery box 4. The filter barrel 1 is sealed. A second gear 13 is installed at the lower end of the filter barrel 1. A motor is installed on the sealing block 10, and a third gear 14 is installed on the output shaft of the motor on the sealing block 10. The third gear 14 meshes with the second gear 13. When the motor on the sealing block 10 is working, it drives the third gear 14 to rotate. As the third gear 14 rotates, it moves on the second gear 13, causing the sealing block 10 to slide on the filter barrel 1. This allows the sealing block 10 to close and open the opening between the filter barrel 1 and the recovery box 4. A placement groove 15 is also provided on the side of the filter barrel 1. When the sealing block 10 releases the seal on the opening between the filter barrel 1 and the recovery box 4, it slides... The filter canister 1 is placed into the placement slot 15 to complete the placement of the sealing block 10. A placement box 6 is provided on the side of the filter canister 1. A baffle 11 is slidably installed in the placement box 6 to seal the air inlet 2. An electric cylinder is provided in the placement box 6. The electric cylinder pushes the baffle 11 to slide in the placement box 6. An installation ring 8 is provided at the end of the filter canister 1 near the air outlet 3. A gear 12 and two sets of adjusting brackets 9 are provided on the installation ring 8. The adjusting brackets 9 are slidably connected to the installation ring 8. Two sets of motors are provided on the adjusting brackets 9. A gear 16 is provided on the output shaft of one of the motors. The gear 16 meshes with the gear 12. When the gear 16 is driven to rotate, Gear 4 16 rotates on gear 1 12, and gear 4 16 drives adjustment frame 1 9 to slide on mounting ring 8. Adjustment frame 2 17 is rotatably installed inside adjustment frame 1 9. Another set of motors is connected to adjustment frame 2 17, and the motor drives adjustment frame 2 17 to rotate on adjustment frame 1 9. Electric cylinder and cleaning frame 18 are installed inside adjustment frame 2 17. Adjustment frame 2 17 and cleaning frame 18 are slidably connected. Electric cylinder inside adjustment frame 2 17 drives cleaning frame 18 to slide inside adjustment frame 2 17. Blower head 19 is installed on cleaning frame 18. Blower head 19 blows air onto dust filter bag 7, blowing off the coal dust on the dust filter bag 7, thus completing the collection of coal dust.

[0023] Working principle: In the initial state, the baffle 11 is retracted into the placement box 6, and the sealing block 10 blocks the opening at the lower end of the filter barrel 1. The surface of the second adjusting frame 17 is parallel to that of the first adjusting frame 9. At this time, air containing coal dust is injected into the filter barrel 1 through the air inlet 2. The air and coal dust pass through the filter dust bag 7 and are discharged through the air outlet 3. The coal dust is collected by the filter dust bag 7 and accumulates on the side of the filter dust bag 7 facing the air inlet 2, thus completing the filtration of coal dust.

[0024] When collecting coal dust, the air supply is first stopped, and the electric cylinder in the placement box 6 is driven to work. The electric cylinder in the placement box 6 pushes the baffle 11 to slide in the placement box 6. The baffle 11 seals the air inlet 2 to prevent the coal dust on the filter bag 7 from running out of the filter barrel 1 through the air inlet 2. Then, the motor on the sealing block 10 is driven. The motor drives the gear 3 14 to rotate. When the gear 3 14 moves on the gear 2 13, it drives the sealing block 10 to move. The sealing block 10 moves into the placement groove 15. At this time, the sealing block 10 opens the opening between the filter barrel 1 and the recovery box 4, and the coal dust can enter the recovery box 4.

[0025] The motors on the two sets of adjusting frames 1-9 are driven to rotate the adjusting frame 2-17. The adjusting frame 2-17 drives the cleaning frame 18 and the blower head 19 towards the dust filter bag 7. At this time, the blower head 19 is facing the dust filter bag 7. The blower head 19 is started to work and blows air onto the dust filter bag 7. The blower head 19 blows the coal dust on the dust filter bag 7 into the collection box 4. The electric cylinder in the adjusting frame 2-17 is driven to work. The electric cylinder pushes the cleaning frame 18 to slide in the adjusting frame 2-17. The cleaning frame 18 drives the blower head 19 to move and adjust the position of the blower head 19. The other set of motors on the adjusting frame 1-9 is driven to rotate. The motor drives the gear 4-16 to rotate. The gear 4-16 moves on the gear 1-12 and drives the adjusting frame 1-9 to move on the mounting ring 8. The adjusting frame 1-9 drives the adjusting frame 2-17 to move, changing the position of the adjusting frame 2-17 and the blower head 19, improving the cleaning efficiency of the blower head 19 on the dust filter bag 7 and improving the coal dust collection efficiency.

Claims

1. A coal powder filtration and collection device for coalbed methane extraction, comprising a filter barrel (1), wherein a filter barrel (1) and a gas outlet (3) are respectively provided on both sides of the filter barrel (1), characterized in that: The filter barrel (1) is equipped with a dust filter bag (7) and an installation ring (8). The dust filter bag (7) filters the coal powder. The filter barrel (1) is equipped with a recovery box (4) at the lower end. The recovery box (4) recovers the coal powder. Two sets of adjustment frames (9) are slidably arranged on the installation ring (8). An adjustment frame (17) is rotatably arranged on the adjustment frame (9). A cleaning frame (18) is slidably arranged inside the adjustment frame (17). A blower head (19) is arranged on the cleaning frame (18). The blower head (19) blows air towards the dust filter bag (7).

2. The coal powder filtration and collection device for coalbed methane extraction according to claim 1, characterized in that: The filter barrel (1) is provided with a placement box (6) on its side, and a baffle (11) is slidably arranged inside the placement box (6) to seal the air inlet (2).

3. A coal powder filtration and collection device for coalbed methane extraction according to claim 2, characterized in that: An opening is provided at the connection position between the filter barrel (1) and the recycling box (4), and a sealing block (10) is slidably provided inside the filter barrel (1) to seal the opening between the filter barrel (1) and the recycling box (4).

4. A coal powder filtration and collection device for coalbed methane extraction according to claim 3, characterized in that: The filter bucket (1) is provided with a placement groove (15), and the sealing block (10) is inserted into the placement groove (15).

5. A coal powder filtration and collection device for coalbed methane extraction according to claim 4, characterized in that: A recycling pipe (5) is provided at the lower end of the recycling bin (4).

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