A coal-water separation device for use in a coal mine

Abstract

The utility model relates to a coal water separation device for coal mine underground, including the collecting box that is equipped with gas suction port, the feed pipe that seals inserts into the collecting box, is equipped with the collecting port that is connected with the collecting pipe on the circumference of feed pipe, a plurality of water inlets are connected to the feed inlet of feed pipe, the underground water pipe is connected to the water inlet, still be equipped with the water jet pipe that is connected with a water inlet in the feed pipe, still set up a plurality of water mist sprays on the water jet pipe. The utility model discloses when using, the gas suction port carries out the air extraction to the collecting box, makes the collecting box to become the negative pressure, the gas and coal dust mixture in the collecting pipe, along the collecting port into the feed pipe, simultaneously, the water in the underground water pipe also enters the feed pipe after passing through the water inlet, and the coal dust contacts with the water mist in the feed pipe, thereby realizes the dust-settling effect, and the water also enters the water jet pipe through the water inlet and sprays from the water mist sprays, realizes the dust-settling effect from inside to outside, thereby realizes the dust-settling effect fully.

Description

Technical Field

[0001] This utility model relates to the field of coal seam gas extraction, specifically to a coal-water separation device used in underground coal mines. Background Technology

[0002] Extensive underground drilling work is required in gas drainage and coal seam mining, including drilling through layers, drilling within the same coal seam, face excavation, and coal uncovering through rock passages. However, high gas content in mines can lead to coal dust explosions, increasing the destructive potential.

[0003] Coal mine drilling is a process where large amounts of coal dust are generated and concentrated, with over 90% of the dust produced during drilling being respirable coal dust, which flies everywhere. Coal dust can cause significant damage to the eyes, ears, skin, digestive system, and respiratory system, especially the respiratory system. If workers are exposed to environments with excessive coal dust concentrations for extended periods, they are highly susceptible to developing severe pneumoconiosis. Due to the natural and explosive nature of coal dust, the risk of coal dust explosions is widespread and serious. High methane levels during drilling can easily lead to excessive return air, and the mixing of this with high concentrations of coal dust further increases the risk of explosion and poisoning. Traditional methods, such as spraying water or mist at the borehole opening, are ineffective in dust control.

[0004] Chinese utility model patent application number 201120474588.6 discloses a gas-slag separation and coalbed methane recovery device for underground coal mine drilling to solve the above-mentioned technical problems. However, the device is equipped with a spray device in the second cavity and sprays directly, which has a poor dust reduction effect. Utility Model Content

[0005] This utility model addresses the shortcomings of existing technologies by providing a coal-water separation device for underground coal mines. When coal powder and gas enter the feed pipe, dust suppression is performed. The feed pipe is equipped with a spiral water spray pipe with spray nozzles to spray dust from the inside out, thereby achieving sufficient dust suppression.

[0006] This utility model is achieved through the following technical solution: a coal-water separation device for underground coal mines, including a collection box with a gas extraction port, and a feed pipe sealed and inserted into the collection box. The feed pipe has a collection port connected to the collection pipe on its circumference. The feed port of the feed pipe is connected to several water inlet connectors, and the water inlet connectors are connected to underground water pipes. The feed pipe is also provided with a water spray pipe connected to a water inlet connector, and the water spray pipe is also provided with several water mist nozzles.

[0007] In use, this invention evacuates the collection box through the gas extraction port, creating a negative pressure inside. The mixture of gas and coal dust in the collection pipe flows into the feed pipe through the collection port. Simultaneously, water from the underground water pipe enters the feed pipe through the water inlet connector. The coal dust and water come into contact in the feed pipe, causing the water to flush the coal dust and thus achieving dust suppression. At the same time, water also enters the water spray pipe through the water inlet connector and is atomized and sprayed out from the water mist nozzle, achieving dust suppression from the inside out, thus achieving sufficient dust suppression.

[0008] Preferably, the water spray pipe has a spiral buffer plate extending along its length on its circumference. This preferred solution increases the feed path length of gas and pulverized coal by setting the spiral buffer plate, and also buffers the pulverized coal, thereby reducing the velocity of the pulverized coal and facilitating its mixing with the water mist sprayed from the water mist nozzle.

[0009] Preferably, the feed pipe extends at an angle from the outside in and from top to bottom. This preferred design facilitates guiding pulverized coal into the collection box.

[0010] Preferably, the feed pipe includes an outer pipe located outside the collection box and having the collection port, an inner pipe located inside the collection box, and an intermediate pipe connecting the inner and outer pipes. The inner pipe is a reducing pipe, with its smaller diameter end connected to the intermediate pipe. The spiral buffer plate and the water mist nozzle are both located inside the inner pipe. This preferred embodiment facilitates installation during use due to the arrangement of the outer, inner, and intermediate pipes.

[0011] Preferably, the intermediate pipe is connected to the outer and inner pipes via a flange. This preferred embodiment facilitates the assembly of the intermediate pipe, the outer pipe, and the inner pipe.

[0012] Preferably, the top surface of the collection box includes a first top plate with the gas extraction port and a second top plate connected to the first top plate. The first top plate is located at the top of the feed pipe, and the second top plate is an inclined surface that slopes upward from bottom to top and toward the gas extraction port.

[0013] This preferred solution uses an inclined plate for the second top plate, which facilitates the entry of gas leaving the feed pipe into the gas extraction port under the guidance of the second top plate.

[0014] Preferably, an observation window is sealed on the second top plate. This preferred embodiment facilitates observation of the interior of the collection box through the observation window.

[0015] Preferably, the collection box is also equipped with several lifting rings. This preferred embodiment facilitates the lifting of the collection box by using lifting rings.

[0016] Preferably, the drain outlet of the collection tank is equipped with a one-way pressure valve. In use, when the liquid level in the collection tank is high, the one-way pressure valve opens under water pressure, thereby achieving automatic drainage. When the liquid level drops to a certain position, the one-way pressure valve resets.

[0017] The beneficial effects of this utility model are as follows: by evacuating the collection box through the gas extraction port, a negative pressure is created inside the collection box. The mixture of gas and coal powder in the collection pipe enters the feed pipe through the collection port. At the same time, water from the underground water pipe also enters the feed pipe through the water inlet connector. The coal powder and water mist come into contact in the feed pipe, thereby achieving the dust suppression effect. Meanwhile, water also enters the water spray pipe through the water inlet connector and is sprayed out from the water mist nozzle, achieving dust suppression from the inside out, thus achieving sufficient dust suppression. Attached Figure Description

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

[0019] Figure 2 These are three views of the structure of this utility model;

[0020] As shown in the figure:

[0021] 1. First roof slab, 2. Second roof slab, 3. Observation window, 4. Gas extraction port, 5. Lifting ring, 6. Collection box, 7. Slag discharge port, 8. Drainage port, 9. Water inlet connector, 10. Collection port, 11. Outer pipe, 12. Middle pipe, 13. Inner pipe, 14. Spiral buffer plate, 15. Water mist nozzle, 16. Water spray pipe. Detailed Implementation

[0022] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0023] See attached document Figure 1-2 This utility model discloses a coal-water separation device for underground coal mines, including a collection box 6 with a gas extraction port 4. There are two gas extraction ports 4, and each of the two gas extraction ports 4 is connected to a gas extraction pump.

[0024] The coal-water separation device also includes a feed pipe that is sealed and inserted into the collection box 6. The feed pipe extends from the outside to the inside and from top to bottom. The feed pipe includes an outer pipe 11 located outside the collection box 6, an inner pipe 13 located inside the collection box 6, and an intermediate pipe 12 connecting the inner pipe 13 and the outer pipe 11. The intermediate pipe 12 is sealed and inserted into the collection box 6. The intermediate pipe 12 is connected to the outer pipe 11 and the inner pipe 13 through a flange.

[0025] The outer tube 11 has a collection port 10 on its circumferential surface, which is connected to a collection pipe. The collection pipe is connected to a drill bit (existing technology). Several water inlet connectors 9 are sealed to the end face of the outer tube 11, which is connected to a downhole water pipe. The feed pipe also has a spray pipe 16 connected to one of the water inlet connectors 9. The spray pipe 16 is coaxially arranged with the feed pipe. Several water mist nozzles 15 are formed on the circumferential surface of the spray pipe 16, located within the inner tube 13. A spiral buffer plate 14 extending along the length of the spray pipe 16 and located within the inner tube 13 is provided on the circumferential surface of the spray pipe 16. The inner tube 13 is a reducing pipe, with its smaller diameter end connected to the intermediate tube 12.

[0026] The top surface of the collection box 6 includes a first top plate 1 with the gas extraction port 4, and a second top plate 2 connected to the first top plate 1. The first top plate 1 is located directly above the feed pipe, and the second top plate 2 is an inclined surface that slopes upward from bottom to top and towards the gas extraction port 4. An observation window 3 is sealed on the second top plate 2.

[0027] The collection box 6 is also equipped with several lifting rings 5. The drain outlet 8 of the collection box 6 is equipped with a one-way pressure valve. The slag discharge port 7 of the collection box 6 is sealed with a sealing plug.

[0028] In use, this invention uses a gas extraction port 4 to evacuate the collection box 6, creating a negative pressure inside. The mixture of gas and coal dust in the collection pipe flows into the feed pipe through the collection port 10. Simultaneously, water from the underground water pipe enters the feed pipe through the water inlet connector 9. The coal dust and water mist come into contact within the feed pipe, achieving dust suppression. Water also enters the spray pipe 16 through the water inlet connector 9 and is sprayed from the water mist nozzle 15, achieving dust suppression from the inside out, thus ensuring thorough dust reduction. The spiral buffer plate 14 increases the feed path length for both gas and coal dust, while also buffering the coal dust, reducing its velocity and facilitating mixing with the water mist sprayed from the water mist nozzle 15.

[0029] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A coal-water separation device for underground coal mines, comprising a collection box (6) equipped with a gas extraction port (4), characterized in that: It also includes a feed pipe that is sealed and inserted into the collection box (6). The feed pipe has a collection port (10) connected to the collection pipe on its circumference. The feed port of the feed pipe is connected to several water inlet connectors (9). The water inlet connectors (9) are connected to a well water pipe. The feed pipe is also provided with a water spray pipe (16) connected to a water inlet connector (9). The water spray pipe (16) is also provided with several water mist nozzles (15).

2. The coal-water separation device for underground coal mines according to claim 1, characterized in that: The water spray pipe (16) has a spiral buffer plate (14) extending along its length on its circumferential surface.

3. The coal-water separation device for underground coal mines according to claim 2, characterized in that: The feed pipe extends from the outside in and from top to bottom at an angle.

4. The coal-water separation device for underground coal mines according to claim 3, characterized in that: The feed pipe includes an outer pipe (11) located outside the collection box (6) and having the collection port (10) thereon, an inner pipe (13) located inside the collection box (6), and an intermediate pipe (12) connecting the inner pipe (13) and the outer pipe (11). The inner pipe (13) is a variable diameter pipe, and the small diameter end of the inner pipe (13) is connected to the intermediate pipe (12). The spiral buffer plate (14) and the water mist nozzle (15) are both located inside the inner pipe (13).

5. The coal-water separation device for underground coal mines according to claim 4, characterized in that: The intermediate pipe (12) is connected to the outer pipe (11) and the inner pipe (13) via a flange.

6. The coal-water separation device for underground coal mines according to claim 1, characterized in that: The top surface of the collection box (6) includes a first top plate (1) with the gas extraction port (4) and a second top plate (2) connected to the first top plate (1). The first top plate (1) is located at the top of the feed pipe, and the second top plate (2) is an inclined surface that slopes upward from the bottom and towards the gas extraction port (4).

7. The coal-water separation device for underground coal mines according to claim 6, characterized in that: The second top plate (2) is sealed with an observation window (3).

8. The coal-water separation device for underground coal mines according to claim 1, characterized in that: The collection box (6) is also equipped with several lifting rings (5).

9. The coal-water separation device for underground coal mines according to claim 1, characterized in that: The collection box (6) is equipped with a one-way pressure valve in the drain outlet (8).

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