A coal seam mining method using an underground gas-liquid separation device

Abstract

This utility model discloses an underground gas-liquid separation device for coal seam mining, relating to the field of coal seam mining technology. The lower separation cylinder has an integrally connected liquid outlet pipe at its lower end, with a valve installed on the outside of the liquid outlet pipe. A connecting cylinder is threaded onto the outside of the lower separation cylinder. Filter plates are symmetrically arranged inside the lower separation cylinder, and a sealing gasket is installed at its upper end. The upper separation cylinder has a first baffle, a second baffle, and a third baffle arranged obliquely from top to bottom inside, and a speed-reducing disc is installed above the first baffle inside the upper separation cylinder. The staggered arrangement of the first, second, and third baffles inside the upper separation cylinder allows for deflection of the oil and gas entering the upper separation cylinder, thereby improving the gas-liquid separation effect. Simultaneously, the speed-reducing disc controls the gas flow rate, further enhancing the gas-liquid separation effect. This device is highly practical.

Description

Technical Field

[0001] This utility model relates to the field of coal seam mining technology, and in particular to an underground gas-liquid separation device for coal seam mining. Background Technology

[0002] Coal seam mining refers to the process of extracting coal from underground coal seams in coal mines. This process includes excavating coal from underground coal seams and transporting coal from underground to the surface using different mining methods. During the coal mining process, coal seams contain gases such as methane and water. If these gases and water are not separated and safely handled in a timely manner, they may lead to safety accidents such as gas explosions.

[0003] A Chinese patent discloses a downhole gas-liquid separation device (authorization announcement number CN213924685U). This patented technology constructs a gas-liquid separation device by designing components such as a sleeve, screen pipe, cylinder cover, exhaust pipe, and oil pipe. It can achieve separation by utilizing the density difference between the gas phase and the liquid phase. When the liquid is pumped, it can be filtered by the screen pipe to prevent large solid particles from entering the oil pump and causing damage to the oil pump. The design of blades, connecting rods, and screen covers allows the screen pipe to rotate, making it less prone to clogging and resulting in higher filtration efficiency.

[0004] However, most existing gas-liquid separation methods only use vents to reduce gas flow rate, resulting in poor separation efficiency. For example, the aforementioned comparative document uses vents to reduce velocity. In practical applications, when underground gas and liquid from coal seam mining are introduced into the separator using only vents for velocity reduction, the reduction effect is low, affecting the effectiveness of underground gas-liquid separation and reducing its practicality. Therefore, those skilled in the art provide an underground gas-liquid separation device for coal seam mining to solve the problems mentioned in the background art. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an underground gas-liquid separation device for coal seam mining, which solves the problems mentioned in the background.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a coal seam mining downhole gas-liquid separation device, comprising: an upper separation cylinder, a lower separation cylinder disposed at the lower end of the upper separation cylinder, and an exhaust pipe and an oil delivery pipe disposed from left to right through the upper surface of the upper separation cylinder. The lower end of the lower separation cylinder is integrally connected to a liquid outlet pipe, and a valve is disposed on the outside of the liquid outlet pipe. A connecting cylinder is threaded to the outside of the lower separation cylinder. Filter plates are symmetrically disposed inside the lower separation cylinder, and a sealing gasket is disposed at the upper end of the lower separation cylinder. The upper separation cylinder is provided with a first baffle, a second baffle, and a third baffle arranged obliquely from top to bottom inside, and a speed reduction disc is disposed above the first baffle inside the upper separation cylinder.

[0007] As a further technical solution of this utility model, one side of the first baffle and the third baffle are fixed to the inner wall of the upper separation cylinder, and one side of the second baffle is fixed to the other inner wall of the upper separation cylinder.

[0008] As a further technical solution of this utility model, the lower end of the oil pipeline passes through the interior of the first baffle, the second baffle and the third baffle. The first baffle and the third baffle are arranged with the left side lower than the right side, and the second baffle is arranged with the left side higher than the right side.

[0009] As a further technical solution of this utility model, the speed reduction disc is arranged vertically inside the upper separator cylinder and perpendicular to the oil pipeline, and a circular speed reduction hole is opened on the upper surface of the speed reduction disc.

[0010] As a further technical solution of this utility model, both the upper separating cylinder and the lower separating cylinder are provided with external threads on their exteriors, and the inner side of the connecting cylinder is provided with an internal thread that engages with the external threads.

[0011] As a further technical solution of this utility model, the lower end of the sealing gasket is in contact with the upper end of the lower separation cylinder, and the upper end of the sealing gasket is in contact with the lower end of the upper separation cylinder.

[0012] As a further technical solution of this utility model, two sets of filter plates are symmetrically arranged inside the lower separation cylinder, and the filter plates are inclined inside the lower separation cylinder.

[0013] This utility model provides an underground gas-liquid separation device for coal seam mining, which has the following advantages compared with the prior art:

[0014] 1. This design provides an underground gas-liquid separation device for coal seam mining. The upper and lower separation cylinders can be quickly connected via a connecting cylinder, and the sealing gasket can improve the sealing performance of the connection. At the same time, the filter plate can perform double filtration on the liquid generated by gas-liquid separation in coal seam mining, thus avoiding impurities in the liquid that could affect subsequent use. The device has a simple structure, is easy to install and disassemble, and is highly practical.

[0015] 2. This design employs an underground gas-liquid separation device for coal seam mining. By staggering the first, second, and third baffles inside the upper separation cylinder, the oil and gas entering the upper separation cylinder are deflected, thereby improving the gas-liquid separation effect. At the same time, the gas flow rate can be reduced by a speed-reducing disc, which further enhances the gas-liquid separation effect. It has good practicality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of an underground gas-liquid separation device used in coal seam mining.

[0017] Figure 2This is a schematic diagram of the internal structure of the upper separation cylinder in an underground gas-liquid separation device used in coal seam mining.

[0018] Figure 3 This is a schematic diagram of the lower separation cylinder in an underground gas-liquid separation device used in coal seam mining.

[0019] In the diagram: 1. Upper separator cylinder; 11. Oil delivery pipe; 12. Exhaust pipe; 13. First baffle; 14. Second baffle; 15. Third baffle; 2. Lower separator cylinder; 21. Connecting cylinder; 22. Liquid outlet pipe; 221. Valve; 23. Filter plate; 24. Sealing gasket; 3. Speed ​​reduction disc. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-3 This utility model provides a technical solution for an underground gas-liquid separation device for coal seam mining: it includes an upper separation cylinder 1, a lower separation cylinder 2 located at the lower end of the upper separation cylinder 1, and an exhaust pipe 12 and an oil delivery pipe 11 running from left to right through the upper surface of the upper separation cylinder 1. A liquid outlet pipe 22 is integrally connected to the lower end of the lower separation cylinder 2, and a valve 221 is installed on the outside of the liquid outlet pipe 22. A connecting cylinder 21 is threadedly connected to the outside of the lower separation cylinder 2. Filter plates 23 are symmetrically arranged inside the lower separation cylinder 2, and a sealing gasket is installed at the upper end of the lower separation cylinder 2. 24; The interior of the upper separator 1 is provided with a first baffle 13, a second baffle 14, and a third baffle 15 arranged at an angle from top to bottom. A speed-reducing disc 3 is also provided above the first baffle 13. This arrangement, using the first baffle 13, the second baffle 14, and the third baffle 15, can block and deflect the air entering the upper separator 1 and the lower separator 2, thus reducing the airflow velocity. The speed-reducing disc 3 further reduces the airflow velocity, achieving efficient gas-liquid separation.

[0022] like Figure 2As shown, one side of the first baffle 13 and the third baffle 15 are fixed to the inner wall of the upper separation cylinder 1, and one side of the second baffle 14 is fixed to the other inner wall of the upper separation cylinder 1. The lower end of the oil pipe 11 passes through the interior of the first baffle 13, the second baffle 14 and the third baffle 15. The first baffle 13 and the third baffle 15 are arranged with the left side lower than the right side, and the second baffle 14 is arranged with the left side higher than the right side. This arrangement utilizes the first baffle 13, the second baffle 14 and the third baffle 15 on the side wall of the upper separation cylinder 1 to deflect the airflow, thereby reducing the airflow velocity and achieving efficient separation of gas and liquid in coal seam mining.

[0023] like Figure 2 As shown, the speed reduction disc 3 is vertically arranged inside the upper separation cylinder 1 and the oil supply pipe 11, and a circular speed reduction hole is opened on the upper surface of the speed reduction disc 3. This arrangement utilizes the circular speed reduction hole opened on the speed reduction disc 3 to reduce the flow rate of air when it passes through the speed reduction disc 3, thereby enabling efficient separation of gas and liquid.

[0024] like Figure 1 As shown, both the upper separating cylinder 1 and the lower separating cylinder 2 are provided with external threads on their exteriors, and the inner side of the connecting cylinder 21 is provided with an internal thread that engages with the external threads. This arrangement utilizes the connecting cylinder 21 to connect the upper separating cylinder 1 and the lower separating cylinder 2 via external threads, thereby achieving the purpose of quick installation and disassembly of the upper separating cylinder 1 and the lower separating cylinder 2, and achieving the purpose of cleaning their interiors.

[0025] like Figure 3 As shown, the lower end of the sealing gasket 24 contacts the upper end of the lower separation cylinder 2, and the upper end of the sealing gasket 24 contacts the lower end of the upper separation cylinder 1. This arrangement uses the sealing gasket 24 to ensure the sealing of the connection between the upper separation cylinder 1 and the lower separation cylinder 2.

[0026] like Figure 3 As shown, two sets of filter plates 23 are symmetrically arranged inside the lower separation cylinder 2, and the filter plates 23 are inclined inside the lower separation cylinder 2. This arrangement utilizes the two sets of inclined filter plates 23 inside the lower separation cylinder 2 to achieve the purpose of filtering the separated liquid, which is practical.

[0027] The working principle of this utility model is as follows: When using the underground gas-liquid separation device for coal seam mining, the underground gas from the coal seam requiring gas-liquid separation is first introduced into the upper separation cylinder 1 and the lower separation cylinder 2 through the oil pipeline 11. After entering, the air will rise and pass through the third baffle 15, the second baffle 14 and the first baffle 13 in sequence to achieve the purpose of deflection, which can reduce the air velocity. The air velocity can be further reduced through the deceleration hole opened on the deceleration plate 3, thereby improving the effect of underground gas-liquid separation in coal seam mining. At the same time, the separated liquid will enter the lower separation cylinder 2. After entering, it will pass through the two sets of filter plates 23 inside to achieve the purpose of double filtration. The filtered liquid can be discharged outward through the outlet pipe 22 by opening the valve 221. At the same time, the connecting cylinder 21 rotates on the external threads of the upper separation cylinder 1 and the lower separation cylinder 2, which can separate the liquid and achieve the purpose of cleaning the inside of the upper separation cylinder 1 and the lower separation cylinder 2. It has good practicality.

[0028] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model are implemented according to conventional methods in the art, unless otherwise specified or limited.

Claims

1. A downhole gas-liquid separation device for use in coal seam mining, characterized in that, include: The upper separator (1), the lower separator (2) located at the lower end of the upper separator (1), and the exhaust pipe (12) and the oil supply pipe (11) arranged from left to right through the upper surface of the upper separator (1); The lower end of the lower separation cylinder (2) is integrally connected to the liquid outlet pipe (22), and a valve (221) is provided on the outside of the liquid outlet pipe (22). The lower separation cylinder (2) is threadedly connected to the outside of the lower separation cylinder (2). Filter plates (23) are also symmetrically arranged inside the lower separation cylinder (2), and a sealing gasket (24) is provided at the upper end of the lower separation cylinder (2). The upper separator (1) is provided with a first baffle (13), a second baffle (14) and a third baffle (15) respectively from top to bottom, and a speed reduction disc (3) is provided above the first baffle (13) inside the upper separator (1).

2. The coal mining with downhole gas-liquid separation device according to claim 1, characterized in that, One side of the first baffle (13) and the third baffle (15) are fixed to the inner wall of the upper separation cylinder (1), and one side of the second baffle (14) is fixed to the other inner wall of the upper separation cylinder (1).

3. The downhole gas-liquid separation device for coal-bed mining according to claim 1, characterized in that, The lower end of the oil pipe (11) passes through the interior of the first baffle (13), the second baffle (14) and the third baffle (15). The first baffle (13) and the third baffle (15) are arranged with the left side lower than the right side, and the second baffle (14) is arranged with the left side higher than the right side.

4. The downhole gas-liquid separation device for coal-bed mining of claim 1, wherein, The speed reduction disc (3) is set vertically inside the upper separator (1) and the oil pipe (11), and a circular speed reduction hole is opened on the upper surface of the speed reduction disc (3).

5. The downhole gas-liquid separation device for coal-bed mining according to claim 1, characterized in that, Both the upper separating cylinder (1) and the lower separating cylinder (2) are provided with external threads on their exteriors, and the inner side of the connecting cylinder (21) is provided with an internal thread that engages with the external threads.

6. The underground gas-liquid separation device for coal seam mining according to claim 1, characterized in that, The lower end of the sealing gasket (24) is in contact with the upper end of the lower separation cylinder (2), and the upper end of the sealing gasket (24) is in contact with the lower end of the upper separation cylinder (1).

7. A coal seam mining underground gas-liquid separation device according to claim 1, characterized in that, Two sets of filter plates (23) are symmetrically arranged inside the lower separation cylinder (2), and the filter plates (23) are inclined inside the lower separation cylinder (2).

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