An underground coal mine dust suppression device

Abstract

The utility model provides a kind of coal mine underground dust fall device, it is related to mine dust fall equipment technical field, including support frame, box is installed on support frame, the bottom of box is connected with dust hopper, be equipped with upper baffle in box, the lower portion of upper baffle is equipped with cloth bag, and the avoidance slot corresponding to cloth bag exhaust end is opened in upper baffle, the air inlet is opened in the side of box and air inlet is located below upper baffle, lower baffle is equipped in box, and lower baffle is equipped between cloth bag and air inlet, blowback pipe and secondary dust removal unit are installed in the upper portion of upper baffle in box, the area of upper baffle in box is also equipped with baffle assembly, baffle assembly divides this area into two chambers, by the secondary dust removal unit being set, coal mine underground dust concentration can be effectively reduced, improve working environment, effectively solve the problem that the long-term use effect of underground cloth bag dust collector is not good.

Description

Technical Field

[0001] This utility model relates to the technical field of dust suppression equipment in mines, and more specifically, it relates to a dust suppression device for coal mines. Background Technology

[0002] Baghouse dust collectors are widely used in mine ventilation and dust removal systems due to their excellent filtration effect. They capture dust particles in mine gas through internal filter bags, reducing the dust content in exhaust gases and protecting the working environment within the mine. However, if the filter bags become severely dirty or their filtration performance fails to meet expectations, fine particles may be discharged directly with the gas and enter the mine. This not only leads to a decline in air quality but can also directly threaten miners' health, especially severely impacting their respiratory system, undoubtedly increasing the risk of mine accidents.

[0003] Traditional mine ventilation systems are designed to directly discharge treated gas into the mine without secondary treatment. While this method meets ventilation requirements to some extent, it greatly increases dust concentration in the mine environment if severely soiled filter bags or poor filtration are not detected in time. Prolonged exposure to high dust concentrations can easily lead to occupational diseases in miners, especially respiratory diseases. Therefore, this is an urgent problem to be solved for mine safety and health. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a dust removal device for coal mines, which solves the problem of poor long-term performance of bag dust collectors in underground mines.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] This utility model provides a dust suppression device for coal mines, including a support frame, a housing mounted on the support frame, a dust collection hopper connected to the bottom of the housing, an upper partition inside the housing, a filter bag mounted below the upper partition, a clearance groove corresponding to the exhaust end of the filter bag on the upper partition, an air inlet on one side of the housing located below the upper partition, a lower partition inside the housing located between the filter bag and the air inlet, and a back-blowing pipe and a secondary dust removal unit mounted above the upper partition inside the housing. The box body is further provided with a partition assembly in the area above the upper partition, which divides the area into upper and lower chambers. The partition assembly is provided with a valve structure for one-way connection between the lower chamber and the upper chamber. The backflush pipe is installed in the lower chamber, and the secondary dust removal unit is installed in the upper chamber. The backflush pipe is used to backflush the filter bag, and the secondary dust removal unit is used to spray the gas that enters the upper chamber from the lower chamber through the valve structure. The top of the box body is also provided with an outlet that communicates with the upper chamber and is used to discharge the spray liquid.

[0007] According to one embodiment of the present invention, the partition assembly includes a partition plate, which is inclinedly disposed in the box body. An air inlet guide is provided at the higher end of the partition plate, and a flap valve that opens only upwards is provided on the air inlet guide. A sinking trough for collecting spray liquid is formed at the lower end of the partition plate, and the lower end face of the outlet is flush with the bottom end of the sinking trough.

[0008] According to one embodiment of the present invention, the secondary dust removal unit includes a pressure tank and multiple spray pipes. One end of each spray pipe is connected to a T-joint, and the bottom end of the T-joint is connected to an air inlet branch pipe. Holes connected to the air inlet branch pipes are evenly distributed on the pressure tank. The end of the T-joint away from the spray pipe is connected to an air inlet pipe, and a one-way valve is installed on the air inlet pipe. One end of the pressure tank is connected to a liquid inlet pipe, and a pressure valve is installed on the liquid inlet pipe. The pressure tank is fixedly installed on one outer wall of the housing by a first bracket. The T-joint is located above the pressure tank. One end of the spray pipe extends into the housing, and this end of the spray pipe is fixedly connected to the inner wall of the housing by a second bracket. A pressure gauge is also installed at the top of the pressure tank, and a pressure relief valve is provided at the bottom of the pressure tank.

[0009] According to one embodiment of the present invention, the backflush pipe is provided with a plurality of backflush ports, and each of the clearance grooves has a backflush port directly above it.

[0010] According to one embodiment of the present invention, the distance between the top of the air inlet guide shroud and the upper surface of the housing is greater than the radius of the flap valve, and the opening of the flap valve is arranged facing away from the secondary dust removal unit.

[0011] According to one embodiment of the present invention, the diameter of the air intake branch pipe is smaller than that of the air intake pipe, the air intake pipe and the spray pipe are coaxially arranged, and the air intake pipe and the air intake branch pipe are perpendicular to each other.

[0012] According to one embodiment of the present invention, the lower partition divides the area inside the box located below the upper partition into two chambers, both of which are connected to the interior of the dust collection hopper, and one of the chambers is connected to the air inlet.

[0013] According to one embodiment of the present invention, the one-way valve is configured to allow air to flow unidirectionally from the air inlet pipe to the spray pipe.

[0014] In summary, this application includes at least one of the following beneficial technical effects:

[0015] 1. In this solution, the baffle assembly and valve structure ensure unidirectional gas flow between the upper and lower chambers, preventing gas backflow and short circuits, and improving dust removal efficiency. Simultaneously, the secondary dust removal unit effectively reduces dust concentration in underground coal mines, improving the working environment.

[0016] 2. In this design, the air inlet guide hood allows the gas entering the chamber to be guided to the high point of the partition plate. Through the one-way opening characteristic of the flap valve, the gas can only flow upward into the lower chamber. The flap valve effectively prevents the backflow of gas during the backflushing process. The set-down trough avoids the accumulation of spray liquid in the chamber, keeping the inside of the device clean. At the same time, the flush setting of the lower end of the outlet with the bottom of the set-down trough ensures that the spray liquid can be discharged smoothly and will not remain inside the device, further improving the performance. Attached Figure Description

[0017] Figure 1 This is a structural diagram of a dust suppression device for coal mines according to the present invention;

[0018] Figure 2 This is another structural diagram of a dust suppression device for coal mines according to the present invention;

[0019] Figure 3 This is an internal sectional view of a dust suppression device for coal mines according to this utility model;

[0020] Figure 4 This is a structural diagram of the secondary dust removal unit of a coal mine dust suppression device according to the present invention;

[0021] Figure 5 for Figure 3 Enlarged structural diagram at point A;

[0022] Figure 6This is a structural diagram of a baffle assembly for a dust suppression device in a coal mine, according to the present invention.

[0023] Reference numerals: 1. Housing; 101. Air inlet; 102. Lower partition; 103. Exit outlet; 104. First support; 2. Filter bag; 3. Upper partition; 301. Clearance groove; 4. Dust collection hopper; 5. Support frame; 6. Partition assembly; 601. Divider plate; 602. Air inlet guide hood; 603. Flip valve; 604. Settling trough; 7. Backflush pipe; 8. Secondary dust removal unit; 801. Pressure tank; 802. Spray pipe; 803. T-connector; 8031. Air inlet branch pipe; 804. One-way valve; 805. Air inlet pipe; 806. Liquid inlet pipe; 807. Pressure valve; 808. Second support; 809. Pressure gauge. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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] like Figure 1 , 2 As shown in Figure 3, this utility model provides a dust suppression device for coal mines, including a support frame 5, a box 1 installed on the support frame 5, a dust collection hopper 4 connected to the bottom of the box 1, an upper partition 3 inside the box 1, a cloth bag 2 installed below the upper partition 3, an avoidance groove 301 corresponding to the exhaust end of the cloth bag 2 on the upper partition 3, an air inlet 101 on one side of the box 1 and the air inlet 101 is located below the upper partition 3, a lower partition 102 inside the box 1 is provided, the lower partition 102 is located between the cloth bag 2 and the air inlet 101, the lower partition 102 divides the area inside the box 1 located below the upper partition 3 into two chambers, both of which are connected to the inside of the dust collection hopper 4, and one of the chambers is connected to the air inlet 101.

[0026] For example Figure 3 As shown, a backflush pipe 7 and a secondary dust removal unit 8 are installed above the upper partition 3 inside the housing 1. A partition assembly 6 is also provided in the area above the upper partition 3 inside the housing 1. The partition assembly 6 divides this area into upper and lower chambers. The partition assembly 6 is provided with a valve structure for one-way connection between the lower chamber and the upper chamber. The backflush pipe 7 is installed in the lower chamber, and the secondary dust removal unit 8 is installed in the upper chamber. The backflush pipe 7 is used to backflush the filter bag 2, and the secondary dust removal unit 8 is used to spray the gas that enters the upper chamber from the lower chamber through the valve structure. The top of the housing 1 is also provided with an outlet 103 that communicates with the upper chamber. The outlet 103 is used to discharge the spray liquid.

[0027] Furthermore, the backflush pipe 7 is provided with several backflush ports, and there is a backflush port directly above each clearance groove 301, so as to ensure that the filter bags 2 at each position can be subjected to uniform backflush force and effectively remove the dust attached to the filter bags 2.

[0028] Furthermore, the secondary dust removal unit 8 includes a spray head and a liquid storage tank. The spray head is connected to the liquid storage tank via a pipe. The liquid storage tank stores spray liquid, which can be water or other liquids capable of effectively adsorbing and removing dust. When spraying is required, the spray head evenly sprays the spray liquid onto the gas passing through the upper chamber, further removing dust particles from the gas. The valve structure is a one-way valve 804, ensuring that the gas can only flow from the lower chamber to the upper chamber, preventing backflow of the spray liquid. In addition, the bottom of the support frame 5 is equipped with casters to facilitate the movement and positioning of the entire dust removal device.

[0029] like Figure 5 and 6 As shown, the partition assembly 6 includes a partition plate 601, which is inclinedly disposed within the housing 1. An air inlet guide 602 is located at the higher end of the partition plate 601, and a flap valve 603 that opens only upwards is mounted on the air inlet guide 602. The lower end of the partition plate 601 forms a settling trough 604 for collecting spray liquid, and the lower end face of the outlet 103 is flush with the bottom end of the settling trough 604. By setting the air inlet guide 602, the dust-laden gas entering the housing 1 can first impact the flap valve 603. Since the flap valve 603 only opens upwards, the dust-laden gas, under pressure, pushes the flap valve 603 open, smoothly entering the lower chamber. The inclined arrangement of the partition plate 601 helps the gas gradually slow down during flow, while also making it easier for dust particles to settle at the bottom of the lower chamber under gravity. The settling trough 604 is designed to collect dust that falls off the filter bag 2 and spray liquid that is not completely discharged during the spraying process, ensuring that this liquid does not re-enter the gas circulation. The lower end of the outlet 103 is flush with the bottom of the settling trough 604, facilitating the discharge of liquid and dust deposited in the settling trough 604 and maintaining the cleanliness of the device's interior. This design not only improves dust suppression efficiency but also effectively prevents secondary pollution.

[0030] The secondary dust removal unit 8 in this embodiment is specifically as follows: Figure 4As shown, it includes a pressure tank 801 and four spray pipes 802. Multiple spray pipes 802 can be set as needed. Then, one end of each spray pipe 802 is connected to a T-connector 803. The bottom end of the T-connector 803 is connected to an air inlet branch pipe 8031. Holes connected to the air inlet branch pipe 8031 ​​are evenly arranged on the pressure tank 801. The end of the T-connector 803 away from the spray pipe 802 is connected to an air inlet pipe 805. A one-way valve 804 is installed on the air inlet pipe 805. The one-way valve 804 is configured to allow one-way flow from the air inlet pipe 805 to the spray pipe 802. One end of the pressure tank 801 is connected to an inlet pipe 806, and a pressure valve 807 is installed on the inlet pipe 806. The pressure tank 801 is fixedly installed on the outer wall of one side of the box body 1 by the first bracket 104. The three-way connector 803 is located above the pressure tank 801. One end of the spray pipe 802 extends into the box body 1, and this end of the spray pipe 802 is fixedly connected to the inner wall of the box body 1 by the second bracket 808. A pressure gauge 809 is also installed on the top of the pressure tank 801, and a pressure relief valve is also provided at the bottom of the pressure tank 801.

[0031] Furthermore, the working principle of the secondary dust removal unit 8 is as follows: A certain amount of high-pressure gas and spray liquid are stored in the pressure tank 801. When the device is started, the high-pressure gas enters the pressure tank 801 through the liquid inlet pipe 806, and the spray liquid is also pumped into the tank. Under pressure, the gas and spray liquid mix and enter the three-way connector 803 through the air inlet branch pipe 8031. The mixture is evenly distributed into the four spray pipes 802 through the three-way connector 803. The mixture in the spray pipes 802 is sprayed out at high speed, forming fine droplets. These droplets fully contact the dust-laden gas, thus removing the dust particles. By capturing and wetting the air, the system achieves deep or secondary dust removal. The one-way valve 804 ensures the flow direction of gas and liquid, preventing backflow. The pressure gauge 809 monitors the pressure in the pressure tank 801 in real time, ensuring the device operates within a safe range. When the pressure exceeds the set value, the pressure relief valve automatically opens to release excess pressure and protect the device from damage. In this way, the secondary dust removal unit 8 can effectively remove fine dust particles from the dust-laden gas, further improving dust removal efficiency. Even when the bag filter 2 is dirty after long-term use, it can still purify the air well.

[0032] Furthermore, the distance between the top of the inlet guide hood 602 and the upper surface of the housing 1 is greater than the radius of the flap valve 603, and the opening of the flap valve 603 is oriented away from the secondary dust removal unit 8, thereby ensuring that the dust-laden gas can smoothly enter the device and be processed by the secondary dust removal unit 8. The distance between the inlet guide hood 602 and the upper surface of the housing 1 avoids collision between the flap valve 603 and the housing 1 when it is opened, and also ensures that the dust-laden gas has enough space for initial deceleration and dispersion, preparing for the subsequent dust removal process. The orientation of the flap valve 603 ensures that the dust-laden gas can smoothly change its flow direction after passing through the flap valve 603 and enter the inlet branch pipe 8031.

[0033] To regulate airflow speed and ensure a more uniform and stable airflow into the secondary dust removal unit 8, the diameter of the inlet branch pipe 8031 ​​is set smaller than that of the inlet pipe 805. The inlet pipe 805 and the spray pipe 802 are coaxially aligned, while the inlet pipe 805 and the inlet branch pipe 8031 ​​are perpendicular. This not only helps improve dust removal efficiency, but also ensures that the coaxial alignment of the inlet pipe 805 and the spray pipe 802 accurately sprays the spray droplets into the dust-laden gas, reducing resistance and improving the effect of deep dust suppression.

[0034] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dust suppression device for coal mines, comprising a support frame (5), a housing (1) mounted on the support frame (5), and a dust collection hopper (4) connected to the bottom of the housing (1), characterized in that, The housing (1) is provided with an upper partition (3), and a cloth bag (2) is installed below the upper partition (3). The upper partition (3) has a relief groove (301) corresponding to the exhaust end of the cloth bag (2). An air inlet (101) is provided on one side of the housing (1) and the air inlet (101) is located below the upper partition (3). The housing (1) is provided with a lower partition (102), which is located between the cloth bag (2) and the air inlet (101). A back-blowing pipe (7) and a secondary dust removal unit (8) are installed above the upper partition (3) in the housing (1). The area above the upper partition (3) is also provided with a partition assembly (6), which divides the area into upper and lower chambers. The partition assembly (6) is provided with a valve structure for one-way communication between the lower chamber and the upper chamber. The backflush pipe (7) is installed in the lower chamber, and the secondary dust removal unit (8) is installed in the upper chamber. The backflush pipe (7) is used to backflush the filter bag (2), and the secondary dust removal unit (8) is used to spray the gas that enters the upper chamber from the lower chamber through the valve structure. The top of the box (1) is also provided with an outlet (103) that communicates with the upper chamber. The outlet (103) is used to discharge the spray liquid.

2. The dust suppression device for coal mines according to claim 1, characterized in that, The partition assembly (6) includes a partition plate (601), which is inclinedly disposed inside the housing (1). The higher end of the partition plate (601) is provided with an air inlet guide hood (602), and the air inlet guide hood (602) is provided with a flap valve (603) that only opens upwards. The lower end of the partition plate (601) forms a sink trough (604) for collecting spray liquid, and the lower end face of the outlet (103) is flush with the bottom end of the sink trough (604).

3. A dust suppression device for coal mines according to claim 2, characterized in that, The secondary dust removal unit (8) includes a pressure tank (801) and multiple spray pipes (802). One end of each spray pipe (802) is connected to a three-way connector (803), and the bottom end of the three-way connector (803) is connected to an air inlet branch pipe (8031). Holes for connecting to the air inlet branch pipes (8031) are evenly arranged on the pressure tank (801). The end of the three-way connector (803) away from the spray pipe (802) is connected to an air inlet pipe (805). A one-way valve (804) is installed on the air inlet pipe (805). One end of the pressure tank (801) is connected to a liquid inlet. The inlet pipe (806) is equipped with a pressure valve (807). The pressure tank (801) is fixedly installed on the outer wall of the box (1) by the first bracket (104). The three-way connector (803) is located above the pressure tank (801). One end of the spray pipe (802) extends into the box (1) and the end of the spray pipe (802) is fixedly connected to the inner wall of the box (1) by the second bracket (808). A pressure gauge (809) is also installed at the top of the pressure tank (801). A pressure relief valve is also provided at the bottom of the pressure tank (801).

4. A dust suppression device for coal mines according to claim 2 or 3, characterized in that, The backflush pipe (7) is provided with several backflush ports, and each of the clearance grooves (301) has a backflush port directly above it.

5. A dust suppression device for coal mines according to claim 4, characterized in that, The distance between the top of the air intake guide hood (602) and the upper surface inside the box (1) is greater than the radius of the flap valve (603), and the opening of the flap valve (603) is set to face away from the secondary dust removal unit (8).

6. A dust suppression device for coal mines according to claim 3, characterized in that, The diameter of the intake branch pipe (8031) is smaller than that of the intake pipe (805). The intake pipe (805) is coaxial with the spray pipe (802). The intake pipe (805) is perpendicular to the intake branch pipe (8031).

7. A dust suppression device for coal mines according to claim 6, characterized in that, The lower partition (102) divides the area inside the box (1) below the upper partition (3) into two chambers, both of which are connected to the inside of the dust collection hopper (4), and one of the chambers is connected to the air inlet (101).

8. A dust suppression device for coal mines according to claim 7, characterized in that, The one-way valve (804) is configured to allow air to flow from the air inlet pipe (805) to the spray pipe (802) in one direction.

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