Coal mine gas extraction gas purification and recovery equipment

Abstract

The utility model relates to gas recovery technical field discloses a kind of coal mine gas extraction gas purification and recovery equipment, including high-pressure delivery pump, suction pipe, gas pipe, purification tank, mixing mechanism, drying shell, separation tank, gas storage tank, support plate and zeolite molecular sieve membrane, suction end of high-pressure delivery pump is connected with suction pipe, the gas outlet end of high-pressure delivery pump is connected with gas pipe, gas pipe is inserted to the inside bottom end of purification tank, the left side of drying shell is equipped with the first conduit connected with purification tank, the right side of drying shell is equipped with the second conduit connected with separation tank, separation tank is fixed with support plate, the front side of support plate is fixed with zeolite molecular sieve membrane, the left side of gas storage tank is equipped with the air inlet pipe connected with separation tank, second valve is installed on air inlet pipe.The utility model is convenient to gas extraction storage, and can remove mixed dust, sulfur dioxide, carbon dioxide, nitrogen dioxide and other impurities in gas, so that gas purity is higher.

Description

Technical Field

[0001] This utility model relates to the field of gas recovery technology, and in particular to a coal mine gas extraction gas purification and recovery device. Background Technology

[0002] Some coal mining areas contain methane gas, which needs to be extracted, stored, and utilized. However, the methane gas in coal mines is often mixed with a significant amount of dust, sulfur dioxide, carbon dioxide, and nitrogen dioxide impurities. Direct extraction results in low purity, making it difficult to utilize directly. Therefore, there is an urgent need to develop a coal mine methane extraction gas purification and recovery device that facilitates methane gas extraction and storage, removes impurities such as dust, sulfur dioxide, carbon dioxide, and nitrogen dioxide, and achieves higher methane purity. This device would overcome the shortcomings of current practical applications and meet current needs. Utility Model Content

[0003] The purpose of this invention is to provide a coal mine gas extraction gas purification and recovery device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A coal mine gas extraction gas purification and recovery device includes a high-pressure conveying pump, an extraction pipe, a gas transmission pipe, a purification box, a mixing mechanism, a drying shell, a separation box, a gas storage tank, a support plate, and a zeolite molecular sieve membrane. The suction end of the high-pressure conveying pump is connected to the extraction pipe, and a dust filter is installed at the end of the extraction pipe. The outlet end of the high-pressure conveying pump is connected to the gas transmission pipe, which is inserted into the bottom of the purification box. Multiple gas outlets are provided on the gas transmission pipe. The purification box stores ammonia water. A mixing mechanism extending into the purification box is installed on the top of the purification box. A first conduit connected to the purification box is installed on the left side of the drying shell, and a second conduit connected to the separation box is installed on the right side of the drying shell. A desiccant is stored inside the drying shell. A support plate is fixed inside the separation box, and a zeolite molecular sieve membrane is fixed to the front side of the support plate. Multiple vent holes are provided on the support plate. An inlet pipe connected to the separation box is installed on the left side of the gas storage tank, and a second valve is installed on the inlet pipe.

[0006] Preferably, the top of the separation box is provided with an exhaust gas output pipe, and a first valve is installed on the exhaust gas output pipe.

[0007] Preferably, the mixing mechanism includes a motor, a first gear, a second gear, and a stirring shaft. The motor is fixed to the purification box, and the first gear is fixed on the output shaft of the motor. A second gear is provided on one side of the first gear to mesh with it. The second gear is fixed to the stirring shaft, and the stirring shaft is rotatably connected to the purification box.

[0008] Preferably, the top of the drying housing is detachably fitted with a top cover.

[0009] Preferably, the top of the purification box is detachably fitted with an end cap, and the bottom of the purification box is detachably fitted with a plug.

[0010] The beneficial effects of this utility model are as follows: When the coal mine gas extraction, purification, and recovery equipment is in use, a high-pressure conveying pump draws in the gas from the mining area. The dust in the gas is filtered out by a dust filter. Then, the gas is conveyed to the purification chamber through the gas delivery pipe and the gas outlet, forming a large number of bubbles. At the same time, the motor drives the first gear, the second gear, and the stirring shaft to rotate. The stirring shaft fully mixes the ammonia water and the gas in the purification chamber, allowing the ammonia water to fully absorb the sulfur dioxide and nitrogen dioxide mixed in the gas. Then, the gas enters the drying shell through the first conduit, where the moisture in the gas is removed by the desiccant. Then, the gas enters the separation chamber. Methane passes through the zeolite molecular sieve membrane and finally enters the gas storage tank to be collected. Carbon dioxide cannot pass through the zeolite molecular sieve membrane and remains in the separation chamber, thereby improving the purity of the gas. After a period of use, the high-pressure conveying pump is turned off, the second valve is closed, and the first valve is opened, allowing the carbon dioxide accumulated in the separation chamber to be discharged from the exhaust gas outlet pipe. In summary, this invention facilitates the extraction and storage of methane gas and can remove impurities such as dust, sulfur dioxide, carbon dioxide, and nitrogen dioxide mixed in the methane gas, resulting in higher methane purity. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0012] Figure 2 This is a partial three-dimensional schematic diagram of the present invention. Figure 1 .

[0013] Figure 3 A partial structural cross-section of this utility model. Figure 1 .

[0014] Figure 4 A partial structural cross-section of this utility model. Figure 2 .

[0015] Figure 5 This is a partial three-dimensional schematic diagram of the present invention. Figure 2 .

[0016] Legend:

[0017] 1. High-pressure delivery pump; 2. Extraction pipe; 201. Dust filter; 3. Gas delivery pipe; 301. Gas outlet; 4. Purification box; 401. End cap; 402. Plug; 5. Mixing mechanism; 501. Motor; 502. First gear; 503. Second gear; 504. Stirring shaft; 6. Drying shell; 601. First conduit; 602. Second conduit; 603. Top cover; 7. Separation box; 701. Waste gas output pipe; 702. First valve; 8. Gas storage tank; 801. Inlet pipe; 802. Second valve; 9. Support plate; 901. Vent hole; 10. Zeolite molecular sieve membrane. Detailed Implementation

[0018] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0019] Specific implementation examples are given below.

[0020] See Figures 1-5 In this embodiment of the present invention, a coal mine gas extraction gas purification and recovery device includes a high-pressure conveying pump 1, an extraction pipe 2, a gas transmission pipe 3, a purification box 4, a mixing mechanism 5, a drying shell 6, a separation box 7, a gas storage tank 8, a support plate 9, and a zeolite molecular sieve membrane 10. The suction end of the high-pressure conveying pump 1 is connected to the extraction pipe 2, which extends into the gas storage area of ​​the mine. A dust filter 201 is installed at the end of the extraction pipe 2 to filter out dust in the gas. The outlet end of the high-pressure conveying pump 1 is connected to the gas transmission pipe 3, which is inserted into the bottom of the purification box 4. Multiple outlet nozzles 301 are provided on the gas transmission pipe 3. The purification box 4 stores ammonia water, which is used to react with sulfur dioxide and nitrogen dioxide to eliminate them. An extension plate is installed on the top of the purification box 4, extending into its interior. The mixing mechanism 5 stirs and mixes the gas and ammonia water to ensure more thorough contact. A first conduit 601 connected to the purification box 4 is installed on the left side of the drying shell 6, and a second conduit 602 connected to the separation box 7 is installed on the right side of the drying shell 6. The drying shell 6 stores desiccant. A top cover 603 is detachably installed on the top of the drying shell 6. The desiccant can be replaced by removing the top cover 603. A support plate 9 is fixed inside the separation box 7. A zeolite molecular sieve membrane 10 is fixed on the front side of the support plate 9. Methane can pass through the zeolite molecular sieve membrane 10, while carbon dioxide cannot pass through the zeolite molecular sieve membrane 10. Multiple vent holes 901 are provided on the support plate 9. An air inlet pipe 801 connected to the separation box 7 is installed on the left side of the gas storage tank 8. A second valve 802 is installed on the air inlet pipe 801.

[0021] The top of the separation box 7 is provided with an exhaust gas output pipe 701, and a first valve 702 is installed on the exhaust gas output pipe 701.

[0022] The mixing mechanism 5 includes a motor 501, a first gear 502, a second gear 503, and a stirring shaft 504. The motor 501 is fixed on the purification box 4. The first gear 502 is fixed on the output shaft of the motor 501. A second gear 503 is provided on one side of the first gear 502 and meshes with it. The second gear 503 is fixed on the stirring shaft 504. The stirring shaft 504 is rotatably connected to the purification box 4. In use, the motor 501 drives the first gear 502, the second gear 503, and the stirring shaft 504 to rotate. The stirring shaft 504 fully mixes the ammonia water and the gas in the purification box 4, so that the ammonia water fully absorbs the sulfur dioxide and nitrogen dioxide mixed in the gas.

[0023] The top of the purification box 4 is detachably fitted with an end cap 401. Ammonia can be added to the purification box 4 by removing the end cap 401. The bottom of the purification box 4 is detachably fitted with a plug 402. The liquid in the purification box 4 can be discharged by removing the plug 402.

[0024] Working Principle: This coal mine gas extraction, purification, and recovery equipment operates by using a high-pressure pump 1 to draw in methane gas from the mining area. Dust is filtered out of the gas by a dust filter 201. The gas is then transported through a gas pipe 3 and an outlet 301 to a purification tank 4, forming numerous bubbles. Simultaneously, a motor 501 drives the first gear 502, the second gear 503, and the stirring shaft 504 to rotate. The stirring shaft 504 thoroughly mixes the ammonia water with the gas in the purification tank 4, allowing the ammonia water to fully absorb the sulfur dioxide and nitrogen dioxide mixed in the methane gas. Then, the gas enters the drying shell 6 from the first conduit 601, where the moisture in the gas is removed by the desiccant. Then, the gas enters the separation box 7. Methane passes through the zeolite molecular sieve membrane 10 and finally enters the gas storage tank 8 to be collected. Carbon dioxide cannot pass through the zeolite molecular sieve membrane 10 and remains in the separation box 7, thereby improving the purity of the gas. After a period of use, the high-pressure delivery pump 1 is turned off, and the second valve 802 is closed and the first valve 702 is opened, so that the carbon dioxide accumulated in the separation box 7 is discharged from the exhaust gas output pipe 701.

[0025] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A coal mine gas extraction gas purification and recovery device, characterized in that, The system includes a high-pressure delivery pump (1), an extraction pipe (2), a gas delivery pipe (3), a purification chamber (4), a mixing mechanism (5), a drying shell (6), a separation chamber (7), a gas storage tank (8), a support plate (9), and a zeolite molecular sieve membrane (10). The suction end of the high-pressure delivery pump (1) is connected to the extraction pipe (2), and a dust filter (201) is installed at the end of the extraction pipe (2). The outlet end of the high-pressure delivery pump (1) is connected to the gas delivery pipe (3), which is inserted into the bottom of the purification chamber (4). Multiple gas outlets (301) are provided on the gas delivery pipe (3). The purification chamber (4) stores ammonia water, and a support plate is installed on the top of the purification chamber (4). The mixing mechanism (5) extends into the interior. A first conduit (601) connected to the purification box (4) is installed on the left side of the drying shell (6). A second conduit (602) connected to the separation box (7) is installed on the right side of the drying shell (6). The drying shell (6) stores desiccant. A support plate (9) is fixed inside the separation box (7). A zeolite molecular sieve membrane (10) is fixed on the front side of the support plate (9). A plurality of vent holes (901) are provided on the support plate (9). An air inlet pipe (801) connected to the separation box (7) is installed on the left side of the gas storage tank (8). A second valve (802) is installed on the air inlet pipe (801).

2. The coal mine gas extraction gas purification and recovery equipment according to claim 1, characterized in that, The top of the separation box (7) is provided with an exhaust gas output pipe (701), and a first valve (702) is installed on the exhaust gas output pipe (701).

3. The coal mine gas extraction gas purification and recovery equipment according to claim 1, characterized in that, The mixing mechanism (5) includes a motor (501), a first gear (502), a second gear (503), and a stirring shaft (504). The motor (501) is fixed on the purification box (4). The first gear (502) is fixed on the output shaft of the motor (501). A second gear (503) is provided on one side of the first gear (502) and meshes with it. The second gear (503) is fixed on the stirring shaft (504). The stirring shaft (504) is rotatably connected to the purification box (4).

4. The coal mine gas extraction gas purification and recovery equipment according to claim 1, characterized in that, The top of the drying housing (6) is detachably fitted with a top cover (603).

5. The coal mine gas extraction gas purification and recovery equipment according to claim 1, characterized in that, The top of the purification box (4) is detachably fitted with an end cap (401), and the bottom of the purification box (4) is detachably fitted with a plug (402).

Images