Ultralow-pressure coal bed gas purification and separation device

Abstract

The utility model belongs to the field of coal bed gas purification, and particularly relates to an ultra-low pressure coal bed gas purification and separation device which comprises a gas-liquid centrifugal machine used for ultra-low pressure coal bed gas purification and separation, a gas phase outlet pipe is installed on the inner wall of the top of the gas-liquid centrifugal machine in a rotating mode, and a spiral blade is fixedly installed on the outer side of the gas phase outlet pipe. A gas inlet head is fixedly installed on one side of the gas-liquid centrifugal machine, a closed pipeline is fixedly installed on the other side of the gas inlet head, and a closing mechanism is arranged on the inner side of the closed pipeline. According to the gas-liquid centrifugal machine, the gas inlet speed of the gas-liquid centrifugal machine can be controlled, so that the situation that the centrifugal effect in the equipment is reduced when the flowing speed of entering gas is too high is prevented, the practicability of the equipment is effectively enhanced, meanwhile, the sealing mechanism can also effectively prevent gas from flowing back, and the clean and sealed state in the system is kept.

Description

TECHNICAL FIELD

[0001] The utility model relates to coalbed gas purification technical field especially relates to a kind of coalbed gas purification separation devices of ultra-low pressure. BACKGROUND

[0002] Coalbed gas refers to the unconventional natural gas stored in coal seam, mainly composed of methane, mainly in adsorbed state, formed and stored in coal seam and its surrounding rock; it is formed by biochemical action and coalification during metamorphic process of coal, with low permeability and low porosity reservoir characteristics, and needs to be drained and depressurized to produce, desorbed as free gas, associated with coal resources, rich in global resources, mainly distributed in North China, Northwest and Northeast China, is clean and efficient energy, with multiple purposes such as domestic fuel gas, industrial fuel, power generation and chemical raw materials, and has multiple benefits in development and utilization.

[0003] When coalbed gas is purified and separated, centrifugal gas-liquid separator is often used to separate coalbed gas and liquid, but when the existing equipment is started, the centrifugal force inside the equipment has not reached the peak, and when coalbed gas enters the equipment at a fast flow rate, the centrifugal effect of the equipment is reduced, thereby affecting the gas-liquid separation effect.

[0004] Therefore, we propose a kind of coalbed gas purification separation device of ultra-low pressure to solve the above problems. UTILITY MODEL CONTENT

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A kind of coalbed gas purification separation device of ultra-low pressure, including the gas-liquid centrifuge for ultra-low pressure coalbed gas purification separation, gas phase outlet pipe is rotatably installed on the top inner wall of the gas-liquid centrifuge, and spiral blade is fixedly installed on the outer side of the gas phase outlet pipe;One side of the gas-liquid centrifuge is fixedly installed with air inlet head, and the other side of the air inlet head is fixedly installed with closed pipeline, and the inner side of the closed pipeline is provided with sealing mechanism.

[0007] Specifically, servo motor is fixedly installed on the top of the gas-liquid centrifuge, the output shaft of the servo motor is fixedly connected with the gas phase outlet pipe, and the gas phase outlet pipe can be rotated by servo motor.

[0008] Specifically, air outlet head is fixedly installed on one side of the gas-liquid centrifuge, which is convenient for discharging the gas rising through the gas phase outlet pipe.

[0009] Specifically, liquid distribution plate is fixedly installed on the inner side of the gas-liquid centrifuge, and a plurality of liquid distribution holes are formed in the top of the liquid distribution plate.

[0010] Specific, the other end of the closed pipeline is fixedly installed with a buffer tube, the other end of the buffer tube is fixedly installed with a blocking plate, the inside of the buffer tube is provided with a buffer cavity, which is convenient for buffering the coal bed gas.

[0011] Specific, the top of the closed pipeline is fixedly penetrated with a guide pipe, and the top of the guide pipe is fixedly installed with a control shell.

[0012] Specific, the closing mechanism comprises a valve rod, two valve plates and a valve seat, the bottom inner wall of the closed pipeline is fixedly installed with the valve seat, the inside of the guide pipe is slidably installed with the valve rod, one end of the valve rod is in contact with the valve seat, the inside of the guide pipe is provided with two guide grooves, and the two guide grooves are slidably installed with the two valve plates; the side, where the two valve plates are close to each other, is fixedly connected with the same valve rod, and the two valve plates can be moved by the valve rod.

[0013] Specific, the top inner wall of the control shell is fixedly installed with a gas cylinder, and the output end of the gas cylinder is fixedly connected with the other end of the valve rod, so that the valve rod can be controlled by the gas cylinder.

[0014] Compared with the prior art, the beneficial effects of the utility model lie in that: through the setting of the closing mechanism, the air inlet speed of the gas-liquid centrifugal machine can be controlled, so that when the flow speed of the entering gas is too fast, the centrifugal effect inside the equipment is prevented from being reduced, the practicability of the equipment is effectively enhanced, and meanwhile the closing mechanism can effectively prevent the backflow of the gas, and the cleanliness and sealing state inside the system are maintained. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a three-dimensional structure schematic view of the ultra-low pressure coal bed gas purification separation device;

[0016] Figure 2 It is a three-dimensional structure sectional view schematic view of the ultra-low pressure coal bed gas purification separation device;

[0017] Figure 3 It is a three-dimensional structure schematic view of the buffer tube of the ultra-low pressure coal bed gas purification separation device;

[0018] Figure 4 It is a three-dimensional structure sectional view schematic view of the closing mechanism of the ultra-low pressure coal bed gas purification separation device;

[0019] Figure 5 It is a three-dimensional structure disassembly schematic view of the closing mechanism of the ultra-low pressure coal bed gas purification separation device.

[0020] In the figure: 1, gas-liquid centrifuge; 2, servo motor; 3, gas phase outlet pipe; 4, spiral blade; 5, liquid distribution plate; 6, gas outlet head; 7, gas inlet head; 8, closed pipeline; 9, buffer pipe; 10, blocking plate; 11, buffer cavity; 12, guide pipe; 13, control housing; 14, air cylinder; 15, valve rod; 16, valve plate; 17, valve seat. DETAILED DESCRIPTION

[0021] Reference Figures 1-5 The application discloses an ultra-low pressure coal bed gas purification and separation device, which comprises a gas-liquid centrifuge 1 for ultra-low pressure coal bed gas purification and separation, a gas phase outlet pipe 3 is rotatably installed on the inner wall of the top of the gas-liquid centrifuge 1, and spiral blades 4 are fixedly installed on the outer side of the gas phase outlet pipe 3.

[0022] In the embodiment, a servo motor 2 is fixedly installed on the top of the gas-liquid centrifuge 1, the output shaft of the servo motor 2 is fixedly connected with the gas phase outlet pipe 3, and the servo motor 2 can drive the gas phase outlet pipe 3 to rotate.

[0023] In the embodiment, a gas outlet head 6 is fixedly installed on one side of the gas-liquid centrifuge 1, so that the gas rising through the gas phase outlet pipe 3 can be discharged.

[0024] In the embodiment, a liquid distribution plate 5 is fixedly installed on the inner side of the gas-liquid centrifuge 1, and a plurality of liquid distribution holes are formed in the top of the liquid distribution plate 5.

[0025] In the embodiment, a buffer pipe 9 is fixedly installed at the other end of the closed pipeline 8, a blocking plate 10 is fixedly installed at the other end of the buffer pipe 9, and a buffer cavity 11 is formed in the buffer pipe 9, so that the coal bed gas can be buffered.

[0026] In the embodiment, a guide pipe 12 is fixedly penetrated through the top of the closed pipeline 8, and a control housing 13 is fixedly installed on the top of the guide pipe 12.

[0027] In the embodiment, the closed mechanism comprises a valve rod 15, two valve plates 16 and a valve seat 17, the valve seat 17 is fixedly installed on the inner wall of the bottom of the closed pipeline 8, the valve rod 15 is slidably installed on the inner side of the guide pipe 12, one end of the valve rod 15 is in contact with the valve seat 17, two guide grooves are formed in the inner side of the guide pipe 12, the two valve plates 16 are slidably installed in the two guide grooves, and the two valve plates 16 are fixedly connected with the same valve rod 15 on the side close to each other, so that the two valve plates 16 can be moved by the valve rod 15.

[0028] In the embodiment, an air cylinder 14 is fixedly installed on the inner wall of the top of the control housing 13, and the output end of the air cylinder 14 is fixedly connected with the other end of the valve rod 15, so that the valve rod 15 can be controlled by the air cylinder 14.

[0029] Working principle: when using, the worker connects the gas pipeline with the air inlet head 7, and then the coal bed gas impacts the blocking plate 10, and then part of the gas enters the buffer cavity 11 through the buffer hole on the blocking plate 10, and if the gas flow speed changes suddenly during the coal bed gas conveying process, water hammer phenomenon is easy to occur, which causes damage to the pipeline and equipment, the buffer cavity 11 can buffer the gas flow and reduce the sudden change of the gas flow speed, thereby reducing the possibility of water hammer phenomenon, protecting the safety of the equipment and pipeline, and then the servo motor 2 is started, the servo motor 2 drives the gas phase outlet pipe 3 to rotate, the gas phase outlet pipe 3 drives the spiral blade 4 to rotate, thereby generating centrifugal force, at this time, the worker judges that the internal centrifugal force reaches a stable value suitable for gas-liquid separation by observing the instrument display of the equipment, and then starts the air cylinder 14, the air cylinder 14 drives the valve rod 15 to move, the valve rod 15 moves upwards to drive the two valve plates 16 to move upwards, the gas enters the gas-liquid centrifuge 1 through the air inlet head 7, at this time, the gas moves along the spiral channel formed by the inner wall of the gas-liquid centrifuge 1 and the spiral blade 4, in this process, the liquid is separated from the gas under the action of gravity and centrifugal force, and the liquid falls on the liquid distribution plate 5 under the action of gravity after impacting the inner wall, and then reaches the bottom of the gas-liquid centrifuge 1 through the liquid distribution hole, and the gas reaches the liquid distribution plate 5 along the spiral pipe, and then reaches the air outlet head 6 through the gas phase outlet pipe 3 and is discharged, and the gas-liquid separation is completed.

[0030] The technical progress obtained by the utility model relative to the prior art is that the air inlet speed of the gas-liquid centrifuge 1 can be controlled, thereby preventing the centrifugal effect in the equipment from being reduced when the entering gas flow speed is too fast, effectively enhancing the practicability of the equipment, and the sealing mechanism can also effectively prevent gas backflow, maintain the cleanliness and sealing state of the system.

Claims

1. An ultra-low pressure coal bed methane gas purification separation device, characterized in that, The utility model provides a gas -liquid centrifuge (1) for ultra -low pressure coal bed gas purification separation, gas phase outlet pipe (3) is rotatably installed on the top inner wall of gas -liquid centrifuge (1), and the outer side of gas phase outlet pipe (3) is fixedly installed spiral blade (4); One side of gas -liquid centrifuge (1) is fixedly installed with air inlet head (7), and the other side of air inlet head (7) is fixedly installed with closed pipeline (8), and the inner side of closed pipeline (8) is equipped with sealing mechanism.

2. The device according to claim 1, wherein, The top of gas -liquid centrifuge (1) is fixedly installed with servo motor (2), and the output shaft of servo motor (2) is fixedly connected with gas phase outlet pipe (3).

3. The device according to claim 1, wherein, One side of gas -liquid centrifuge (1) is fixedly installed with air outlet head (6).

4. The device according to claim 1, wherein, The inner side of gas -liquid centrifuge (1) is fixedly installed with liquid distribution plate (5), and a plurality of liquid distribution holes are formed in the top of liquid distribution plate (5).

5. The device according to claim 1, wherein, The other end of closed pipeline (8) is fixedly installed with buffer tube (9), the other end of buffer tube (9) is fixedly installed with baffle (10), and buffer cavity (11) is formed in the inside of buffer tube (9).

6. The device according to claim 1, wherein, The top of closed pipeline (8) is fixedly penetrated with guide pipe (12), and control housing (13) is fixedly installed on the top of guide pipe (12).

7. The device according to claim 6, wherein, The sealing mechanism includes valve rod (15), two valve plates (16) and valve seat (17), the bottom inner wall of closed pipeline (8) is fixedly installed with valve seat (17), the inner side of guide pipe (12) is slidably installed with valve rod (15), one end of valve rod (15) is in contact with valve seat (17), two guide grooves are formed in the inner side of guide pipe (12), two valve plates (16) are slidably installed in the two guide grooves, and the side, close to each other of two valve plates (16) is fixedly connected with same valve rod (15).

8. The device according to claim 7, wherein, The top inner wall of control housing (13) is fixedly installed with air cylinder (14), and the output end of air cylinder (14) is fixedly connected with the other end of valve rod (15).

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