Water-gas separation device for coal bed gas exploitation

Abstract

The utility model relates to the technical field of coal bed gas exploitation, and discloses a water-gas separation device for coal bed gas exploitation, which comprises a separation box, and one side of the separation box is provided with a gas inlet. The coal bed gas is input into the separation box through the gas inlet and impacts on the gravity separation plate, the coal bed gas is blocked by the gravity separation plate, and meanwhile, the contact area with the coal bed gas is greatly increased through the multiple water guide plates and the vertical water guide plates, so that a mixture of water and the coal bed gas flows downwards, and due to the fact that water drops deposit downwards due to the weight, gas moves upwards; when the coal bed gas passes through the first umbrella-plate separator, large water drops carried by the coal bed gas are separated, the water drops are condensed on the first umbrella-plate separator and flow downwards, rising natural gas passes through the third umbrella-plate separator, then fine water drops carried by the coal bed gas are separated through the foam breaking net, and the fine water drops are condensed into large water drops to sink down. And the coal bed gas with separated water is discharged from an exhaust port, and the sinking liquid also passes through an umbrella plate separator II, so that the sinking liquid is broken and dispersed.

Description

Technical Field

[0001] The utility model relates to the technical field of coal-bed methane mining, in particular to a water-gas separation device used for coal-bed methane mining. Background Art

[0002] Coalbed methane is a gas resource that is associated and coexistent with coal. It refers to hydrocarbon gas stored in coal seams, with methane as the main component. It is an unconventional natural gas. Coalbed methane is mainly adsorbed on the surface of coal matrix particles, with some hydrocarbon gas free in coal pores or dissolved in coal seam water. At present, the newly mined coalbed methane contains a lot of water vapor, so the water vapor needs to be separated.

[0003] In the prior art, the inventors found that there are at least the following problems in the technology:

[0004] (1) It is very inconvenient to separate water and gas from coalbed methane, and most water and gas separation equipment has a relatively complex structure and is usually used for precise water and gas separation in the later stage. As a result, there is often a lot of water and gas in the gas pipeline that has not been processed. After condensation, it is easy to form liquid accumulation, which is difficult to deal with in time;

[0005] (2) When the accumulated liquid after condensation accumulates too much, the amount of accumulated liquid inside the device will be too much to be discharged in time. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides a water-gas separation device for coalbed methane exploitation, which has the advantages of being able to quickly separate water gas in coalbed methane and effectively treat the accumulated liquid produced after separation, thereby solving the problems raised in the background technology.

[0007] The utility model provides the following technical solution: a water-gas separation device for coalbed methane mining, comprising a separation box, one side of the separation box is provided with an air inlet, the other side of the separation box is fixedly connected to a drain outlet one at the bottom end, the bottom end of the separation box is fixedly connected to a drain outlet two, the inner wall of the separation box is fixedly connected to an umbrella plate separator one, the inner wall of the separation box is fixedly connected to a gravity separation plate, the gravity separation plate corresponds to the position of the air inlet, the side of the gravity separation plate is fixedly connected to a plurality of water guide plates, the inner wall of the separation box is fixedly connected to an umbrella plate separator two, the top of the separation box is fixedly connected to an air cylinder, and a foam breaking net is arranged inside the air cylinder.

[0008] Preferably, the number of the plurality of water guide plates is several, and the plurality of water guide plates are arranged in an inclined and staggered manner relative to each other, and the bottom end of the gravity separation plate is fixedly connected to a plurality of vertical water guide plates.

[0009] Preferably, the number of the umbrella-board separators 2 is three and they are located above the umbrella-board separator 1.

[0010] Preferably, the top of the foam breaking net is fixedly connected to a vertical pole, the top of the air cylinder is threadedly connected to a cover, and the inner wall of the cover abuts against the top of the vertical pole.

[0011] Preferably, a liquid level tube is fixedly connected to the side of the separation box, and the liquid level tube is connected to the separation box.

[0012] Preferably, an inner bottom of the separation box is fixedly connected with an inner sealing cylinder, the inner sealing cylinder corresponds to the position of the second drain outlet, and a sealing plug is arranged inside the inner sealing cylinder.

[0013] Preferably, a plurality of drainage holes are opened on the upper part of the side wall of the inner sealing cylinder, the top of the sealing plug is fixedly connected to a limiting rod, the inner bottom of the separation box is fixedly connected to a guide rod, a floating plate is slidably sleeved on the surface of the guide rod, and the floating plate is fixedly connected to the top of the limiting rod.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The coalbed methane is input into the separation box through the air inlet and hits the gravity separation plate, and the coalbed methane is blocked by the gravity separation plate. At the same time, multiple water guide plates and vertical water guide plates greatly increase the contact area with the coalbed methane, so that the water and coalbed methane mixture flows downward. Since the water droplets have weight and settle downward, the gas moves upward. When passing through the umbrella plate separator one, the larger water droplets entrained by the coalbed methane are separated, and the water droplets condense on the umbrella plate separator one and flow downward. After the rising natural gas passes through the three umbrella plate separators two, it passes through the foam breaking net to separate the fine water droplets entrained by the coalbed methane, so that they condense into larger water droplets and sink. The coalbed methane separated from the water is discharged from the exhaust port, and the sinking liquid also passes through an umbrella plate separator two to break and disperse the sinking liquid, so that the coalbed methane dissolved in the water can overflow, and the descending liquid accumulates at the bottom of the tank, and the liquid is collected, so that the coalbed methane can be discharged from the drain port one. This device can efficiently separate water and gas from coalbed methane.

[0016] 2. By providing an inner sealing cylinder, when the separated liquid is deposited at the bottom of the separation box, when the height of the liquid accumulation becomes higher, the height of the float plate will rise with the increase of the liquid level, and drive the position of the sealing plug to rise. When the height of the sealing plug rises to the drain hole, the sealing state of the sealing plug on the bottom of the inner sealing cylinder is released, so that the liquid is discharged from the inner sealing cylinder through the drain hole, and finally flows out from the second drain port, so that when the liquid level at the bottom of the separation box is too high, it can automatically flow out, effectively avoiding excessive liquid in the separation box, thereby controlling the liquid in the separation box within a certain threshold. At the same time, the setting of the liquid level tube allows the staff to intuitively see the amount of liquid in the separation box. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the utility model device;

[0018] Figure 2 This is a schematic diagram of the sectional structure of the separation box of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the inner sealing cylinder of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the gas cylinder of the utility model.

[0021] In the figure: 1. separation box; 2. air inlet; 3. air cylinder; 4. exhaust port; 5. gravity separation plate; 6. multiple water guide plates; 7. umbrella plate separator 2; 8. umbrella plate separator 1; 9. vertical water guide plate; 10. liquid level pipe; 11. drain outlet 1; 12. drain outlet 2; 13. inner sealing cylinder; 14. drain hole; 15. sealing plug; 16. limit rod; 17. guide rod; 18. floating plate; 19. cover; 20. foam breaking net; 21. vertical pole. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Reference Figure 1-4 A water-gas separation device for coalbed methane mining comprises a separation box 1, an air inlet 2 is provided on one side of the separation box 1, a drain outlet 11 is fixedly connected to the bottom end of the other side of the separation box 1, a drain outlet 2 12 is fixedly connected to the bottom end of the separation box 1, an umbrella plate separator 8 is fixedly connected to the inner wall of the separation box 1, a gravity separation plate 5 is fixedly connected to the inner wall of the separation box 1, the gravity separation plate 5 corresponds to the position of the air inlet 2, a plurality of water guide plates 6 are fixedly connected to the side of the gravity separation plate 5, an umbrella plate separator 2 7 is fixedly connected to the inner wall of the separation box 1, an air cylinder 3 is fixedly connected to the top of the separation box 1, and a foam breaking net 20 is arranged inside the air cylinder 3.

[0024] Among them, the number of the multiple water guide plates 6 is several, and the multiple water guide plates 6 are arranged in an inclined and staggered manner. The bottom end of the gravity separation plate 5 is fixedly connected with several vertical water guide plates 9. The number of the umbrella plate separators 7 is three, and they are located above the umbrella plate separators 8. The air inlet 2 inputs the coalbed methane into the separation box 1 and hits the gravity separation plate 5, and the coalbed methane is blocked by the gravity separation plate 5. At the same time, the multiple water guide plates 6 and the vertical water guide plates 9 greatly increase the contact area with the coalbed methane, so that the water and coalbed methane mixture flows downward. Because the water droplets have weight The downwardly deposited gas moves upward, and when passing through the umbrella plate separator 8, the larger water droplets entrained by the coalbed methane are separated, so that the water droplets condense on the umbrella plate separator 8 and flow downward. The rising natural gas passes through three umbrella plate separators 27, and then passes through the foam breaking net 20 to separate the fine water droplets entrained by the coalbed methane, so that they condense into larger water droplets and sink. The coalbed methane separated from the water is discharged from the exhaust port 4, and the sinking liquid also passes through an umbrella plate separator 27 to break up and disperse the sinking liquid, so that the coalbed methane dissolved in the water can overflow, and the descending liquid accumulates at the bottom of the tank.

[0025] The top of the foam-breaking net 20 is fixedly connected to a vertical pole 21, the top of the air cylinder 3 is threadedly connected to a cover 19, the inner wall of the cover 19 abuts against the top of the vertical pole 21, and the foam-breaking net 20 can be easily taken out and replaced after the cover 19 is opened.

[0026] Among them, a liquid level tube 10 is fixedly connected to the side of the separation box 1, and the liquid level tube 10 is connected with the separation box 1, so that the staff can intuitively see the amount of liquid in the separation box 1.

[0027] Among them, the inner bottom of the separation box 1 is fixedly connected with an inner sealing cylinder 13, the inner sealing cylinder 13 corresponds to the position of the drain port 12, a sealing plug 15 is arranged inside the inner sealing cylinder 13, a plurality of drainage holes 14 are opened on the upper part of the side wall of the inner sealing cylinder 13, the top of the sealing plug 15 is fixedly connected with a limit rod 16, the inner bottom of the separation box 1 is fixedly connected with a guide rod 17, the surface of the guide rod 17 is slidably sleeved with a floating plate 18, and the floating plate 18 is fixedly connected with the top of the limit rod 16. When the separated liquid is deposited at the bottom of the separation box 1, when the height of the liquid accumulation becomes higher At this time, the height of the float plate 18 will rise with the increase of the liquid level, and drive the position of the sealing plug 15 to rise. When the height of the sealing plug 15 rises to the drain hole 14, the sealing state of the sealing plug 15 on the bottom of the inner sealing tube 13 is released, so that the liquid is discharged from the inner sealing tube 13 through the drain hole 14, and finally flows out from the drain port 2 12, so that when the liquid level at the bottom of the separation box 1 is too high, it can automatically flow out, effectively avoiding excessive liquid in the separation box 1, thereby controlling the liquid in the separation box 1 within a certain threshold.

[0028] Working principle: when the device is in use, the air inlet 2 inputs the coalbed methane into the separation box 1 and hits the gravity separation plate 5, and the coalbed methane is blocked by the gravity separation plate 5. At the same time, the multiple water guide plates 6 and the vertical water guide plates 9 greatly increase the contact area with the coalbed methane, so that the water and coalbed methane mixture flows downward. Since the water droplets have weight and settle downward, the gas moves upward. When passing through the umbrella plate separator 8, the larger water droplets entrained by the coalbed methane are separated, and the water droplets condense on the umbrella plate separator 8 and flow downward. After the rising natural gas passes through the three umbrella plate separators 7, it passes through the foam breaking net 20 to separate the fine water droplets entrained by the coalbed methane, so that they condense into larger water droplets and sink. The coalbed methane separated from the water is discharged from the exhaust port 4, and the sinking liquid also passes through an umbrella plate separator 7 to break up and disperse the sinking liquid. In this way, the coalbed methane dissolved in the water can overflow, and the descending liquid accumulates at the bottom of the tank and is collected, so that the coalbed methane can be discharged from the drain port 11 conveniently. When the separated liquid is deposited at the bottom of the separation box 1, when the height of the liquid accumulation becomes higher, the height of the float plate 18 will rise with the increase of the liquid level, and drive the position of the sealing plug 15 to rise. When the height of the sealing plug 15 rises to the drain hole 14, the sealing state of the sealing plug 15 on the bottom of the inner sealing tube 13 is released, so that the liquid is discharged from the inner sealing tube 13 through the drain hole 14, and finally flows out from the drain port 2 12, so that when the liquid level at the bottom of the separation box 1 is too high, it can automatically flow out, effectively avoiding excessive liquid in the separation box 1, thereby controlling the liquid in the separation box 1 within a certain threshold.

[0029] In the description, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, in the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A water-gas separation device for coalbed methane mining, characterized in that: The invention comprises a separation box (1), wherein one side of the separation box (1) is provided with an air inlet (2), the bottom end of the other side of the separation box (1) is fixedly connected with a drain outlet (11), the bottom end of the separation box (1) is fixedly connected with a drain outlet (12), the inner wall of the separation box (1) is fixedly connected with an umbrella plate separator (8), the inner wall of the separation box (1) is fixedly connected with a gravity separation plate (5), the gravity separation plate (5) corresponds to the position of the air inlet (2), the side of the gravity separation plate (5) is fixedly connected with a plurality of water guide plates (6), the inner wall of the separation box (1) is fixedly connected with an umbrella plate separator (7), the top end of the separation box (1) is fixedly connected with an air cylinder (3), and a foam breaking net (20) is arranged inside the air cylinder (3).

2. The water-gas separation device for coalbed methane mining according to claim 1, characterized in that: The number of the plurality of water guide plates (6) is several, and the plurality of water guide plates (6) are arranged in an inclined and staggered manner relative to each other, and the bottom end of the gravity separation plate (5) is fixedly connected to a plurality of vertical water guide plates (9).

3. The water-gas separation device for coalbed methane mining according to claim 1, characterized in that: The number of the second umbrella plate separators (7) is three and they are located above the first umbrella plate separator (8).

4. The water-gas separation device for coalbed methane mining according to claim 1, characterized in that: The top of the foam breaking net (20) is fixedly connected to a vertical rod (21), the top of the air cylinder (3) is threadedly connected to a cover (19), and the inner wall of the cover (19) abuts against the top of the vertical rod (21).

5. The water-gas separation device for coalbed methane mining according to claim 1, characterized in that: A liquid level pipe (10) is fixedly connected to the side of the separation box (1), and the liquid level pipe (10) is connected to the separation box (1).

6. The water-gas separation device for coalbed methane mining according to claim 1, characterized in that: An inner sealing cylinder (13) is fixedly connected to the inner bottom of the separation box (1), the inner sealing cylinder (13) corresponds to the position of the second drainage port (12), and a sealing plug (15) is arranged inside the inner sealing cylinder (13).

7. The water-gas separation device for coalbed methane mining according to claim 6, characterized in that: A plurality of drainage holes (14) are provided on the upper part of the side wall of the inner sealing cylinder (13); the top end of the sealing plug (15) is fixedly connected to a limiting rod (16); the inner bottom of the separation box (1) is fixedly connected to a guide rod (17); a floating plate (18) is slidably sleeved on the surface of the guide rod (17); and the floating plate (18) is fixedly connected to the top end of the limiting rod (16).

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