Pump type switching system based on coal bed gas development

Abstract

The utility model discloses a pump type switching system based on coal bed gas development, and relates to the technical field of coal bed gas development, the pump type switching system comprises a coal bed gas well, a detection box, a filter box and a mechanical controller, the upper side of a fixing plate is fixedly connected with a diaphragm type pressure sensor, and the interior of the detection box is fixedly connected with a water content sensor and a pulverized coal concentration sensor; a filter screen shell is fixedly connected to the inner side of the filter box, a centrifugal separator and a gravity type separator are fixedly connected to the inner side of the filter box, the centrifugal separator is connected with the inner side of the filter screen shell through a pipeline, and the gravity type separator is connected with the centrifugal separator through a pipeline; and the other side of the mechanical controller is connected with a screw pump, a centrifugal pump and a plunger pump through pipelines. And the pump set conveys the coal bed gas to a downstream pipeline through mechanical transmission. According to the device, through multi-stage filtration and real-time detection, pump types are automatically switched, efficient purification of coal bed gas and optimized operation of the pump types are achieved, the development efficiency is improved, and energy consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of coalbed methane development, in particular to a pump type switching system based on coalbed methane development. Background Art

[0002] As a clean energy, the development and utilization of coalbed methane has received more and more attention. However, during the mining process, coalbed methane will carry a large amount of impurities such as coal powder and water, which will damage the subsequent transportation, storage and utilization equipment, reduce the service life of the equipment, and even cause safety accidents. Therefore, in the process of coalbed methane development and utilization, it is necessary to effectively filter and purify the coalbed methane.

[0003] Traditional coalbed methane filtration systems usually adopt a single filtration method, such as only using filter mesh filtration or only using centrifugal separation. It is difficult to effectively remove impurities of different particle sizes and properties in coalbed methane, and the filtration effect is not ideal. In addition, traditional coalbed methane transportation systems usually use fixed types of pumps for transportation, which are difficult to adapt to changes in coalbed methane components and flow rates, resulting in low pump operation efficiency and high energy consumption. Therefore, in response to the above technical problems, a pump type switching system based on coalbed methane development is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide a pump type switching system based on coalbed methane development, which automatically switches the pump type through multi-stage filtration and real-time detection, thereby achieving efficient purification of coalbed methane and optimized operation of the pump type, improving development efficiency and reducing energy consumption.

[0005] The utility model is realized by the following technical solutions:

[0006] A pump type switching system developed based on coalbed methane, comprising:

[0007] A coalbed methane well, with a cover plate fixedly connected to the top;

[0008] A detection box, wherein a first gas pipeline is fixedly connected between the detection box and the coalbed methane well, a fixing plate is fixedly connected to the inner side of the detection box, a diaphragm pressure sensor is fixedly connected to the upper side of the fixing plate, and a water content sensor and a coal powder concentration sensor are fixedly connected to the inside of the detection box;

[0009] A filter box, a second air supply pipe is fixedly connected between the filter box and the detection box, a filter screen shell is fixedly connected to the inner side of the filter box, and the end of the second air supply pipe is located inside the filter screen shell, a centrifugal separator and a gravity separator are fixedly connected to the inner side of the filter box, the centrifugal separator is connected to the inner side of the filter screen shell through a pipeline, and the gravity separator and the centrifugal separator are connected by a pipeline;

[0010] A third air supply pipe is fixedly connected between the mechanical controller and the gravity separator, and a screw pump, a centrifugal pump and a plunger pump are connected to the other side of the mechanical controller through a pipeline.

[0011] Preferably, a first flow meter is fixedly connected to the outside of the first gas pipeline.

[0012] Preferably, a discharge port is provided on the lower side of the fixed plate, and the discharge ports are provided in two groups and are arranged symmetrically.

[0013] Preferably, a waste pool is installed on one side of the filter box, a first sewage pipe is fixedly connected to the outside of the centrifugal separator, and a second sewage pipe is fixedly connected to the outside of the gravity separator, and the ends of the first sewage pipe and the second sewage pipe both pass through the outside of the filter box and extend into the waste pool.

[0014] Preferably, a second flow meter is fixedly installed on the pipeline connecting the screw pump, the centrifugal pump and the plunger pump to the mechanical controller.

[0015] Preferably, a spring-type regulating valve is fixedly installed on the pipeline connecting the screw pump, the centrifugal pump and the plunger pump to the mechanical controller.

[0016] The technical solution of the utility model has at least the following beneficial effects:

[0017] The pump type switching system based on coalbed methane development, after coalbed methane is produced from the coalbed methane well, it first enters the detection box through the first gas pipeline, and passes through the diaphragm pressure sensor, mechanical flowmeter, coal powder concentration sensor and water content sensor in turn, to detect the pressure, flow, coal powder concentration and water content of coalbed methane in real time, providing data basis for subsequent filtration and pump type switching; then, the coalbed methane enters the filter box through the second gas pipeline, first intercepts large particles of coal powder and solid impurities through the filter shell, and then uses centrifugal force to separate fine particles and part of liquid water through the centrifugal separator, and finally further separates liquid water and tiny particles through the gravity separator to ensure clean and stable gas; the filtered coalbed methane enters the mechanical controller through the third gas pipeline, and the controller automatically switches the pump type according to the detection data, starting the screw pump when the coal powder concentration is high, starting the centrifugal pump when the water content is high, and starting the plunger pump when the methane concentration is high and the impurities are less. Through multi-stage filtration and intelligent pump type switching, the system realizes efficient purification and stable transportation of coalbed methane, improves development efficiency and reduces energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is the first partial cross-sectional view of the utility model;

[0020] Figure 3 It is a second partial cross-sectional view of the utility model;

[0021] Figure 4 It is a third partial cross-sectional view of the utility model;

[0022] Icons: 1. Coalbed methane well; 2. Cover plate; 3. Detection box; 4. First gas pipeline; 5. First flow meter; 6. Fixed plate; 7. Discharge port; 8. Diaphragm pressure sensor; 9. Water content sensor; 10. Coal powder concentration sensor; 11. Filter box; 12. Second gas pipeline; 13. Filter shell; 14. Centrifugal separator; 15. Waste pool; 16. First sewage pipe; 17. Gravity separator; 18. Second sewage pipe; 19. Third gas pipeline; 20. Mechanical controller; 21. Screw pump; 22. Centrifugal pump; 23. Plunger pump; 24. Second flow meter; 25. Spring regulating valve. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] Example:

[0025] See also Figure 1-Figure 4The present application proposes a pump type switching system based on coalbed methane development, including a coalbed methane well 1, a detection box 3, a filter box 11 and a mechanical controller 20. A cover plate 2 is fixedly connected to the top of the coalbed methane well 1; a first gas pipeline 4 is fixedly connected between the detection box 3 and the coalbed methane well 1, a fixed plate 6 is fixedly connected to the inner side of the detection box 3, a diaphragm pressure sensor 8 is fixedly connected to the upper side of the fixed plate 6, a water content sensor 9 and a coal powder concentration sensor 10 are fixedly connected to the inside of the detection box 3; a second gas pipeline 12 is fixedly connected between the filter box 11 and the detection box 3, a filter housing 13 is fixedly connected to the inner side of the filter box 11, and the end of the second gas pipeline 12 is located inside the filter housing 13, and the filter box 11 The inner side of the centrifugal separator 14 and the gravity separator 17 are fixedly connected. The centrifugal separator 14 is connected to the inner side of the filter housing 13 through a pipeline, and the gravity separator 17 is connected to the centrifugal separator 14 through a pipeline. The third gas pipeline 19 is fixedly connected between the mechanical controller 20 and the gravity separator 17. The other side of the mechanical controller 20 is connected to a screw pump 21, a centrifugal pump 22 and a plunger pump 23 through a pipeline. The screw pump 21 adopts a mechanical transmission shaft and a screw structure, which is suitable for coalbed methane with a high coal powder content; the centrifugal pump 22 adopts an impeller and a mechanical seal structure, which is suitable for coalbed methane with a high water content; the plunger pump 23 adopts a reciprocating plunger structure, which is suitable for coalbed methane with a high methane content. The pump group transports the coalbed methane to the downstream pipeline through mechanical transmission.

[0026] The first gas transmission pipe 4 is externally fixedly connected with a first flow meter 5 for real-time monitoring of the flow change of the coalbed methane and providing data support for subsequent pump type switching.

[0027] A discharge port 7 is provided on the lower side of the fixed plate 6, and the discharge ports 7 are provided in two groups and are arranged symmetrically, so as to facilitate regular cleaning of deposited coal powder and impurities and ensure long-term stable operation of the system.

[0028] A waste pool 15 is installed on one side of the filter box 11, a first sewage pipe 16 is fixedly connected to the outside of the centrifugal separator 14, and a second sewage pipe 18 is fixedly connected to the outside of the gravity separator 17. The ends of the first sewage pipe 16 and the second sewage pipe 18 pass through the outside of the filter box 11 and extend into the waste pool 15, so as to realize the centralized collection and treatment of impurities and avoid environmental pollution.

[0029] A second flow meter 24 is fixedly installed on the pipeline connecting the screw pump 21, the centrifugal pump 22 and the plunger pump 23 with the mechanical controller 20, and is used to accurately control the gas delivery volume of different pump types to ensure the operating efficiency of the system.

[0030] A spring-loaded regulating valve 25 is fixedly installed on the pipeline connecting the screw pump 21, the centrifugal pump 22 and the plunger pump 23 with the mechanical controller 20, and can automatically adjust the valve opening according to the gas pressure and flow, thereby further optimizing the system operation stability.

[0031] The working principle of the pump type switching system developed based on coalbed methane according to the embodiment is that after the coalbed methane is produced from the coalbed methane well 1, it first enters the detection box 3 through the first gas pipeline 4, and gradually passes through the diaphragm pressure sensor 8, the first flowmeter 5, the coal powder concentration sensor 10, and the water content sensor 9 to detect the coal powder concentration, water content, and methane concentration in the coalbed methane in real time. The diaphragm pressure sensor 8 measures the gas pressure by the deformation of the diaphragm, the first flowmeter 5 measures the gas flow by the rotation speed of the turbine, the coal powder concentration sensor 10 detects the coal powder content by optical or mechanical means, and the water content sensor 9 detects the coal powder content by capacitance. Or mechanically detect the liquid water content, these detection data provide a basis for subsequent filtration and pump type switching; next, the coalbed methane enters the filter box 11 through the second gas pipeline 12, firstly, the large particles of coal powder and solid particles are intercepted by the screen on the filter housing 13 to prevent these impurities from entering the subsequent equipment, and then the centrifugal separator 14 uses centrifugal force to separate the fine particles and part of the liquid water, and discharges them into the waste pool 15 through the first sewage pipe 16, reducing the burden on the gravity separator 17, and then the gravity separator 17 separates the liquid water and tiny particles by gravity to ensure that the gas that finally enters the pump group The gas contains almost no liquid water and tiny particles. In this way, impurities of different particle sizes and properties are gradually removed through step-by-step filtration to ensure clean and stable gas. The filtered coalbed methane enters the mechanical controller 20 through the third gas transmission pipe 19. The mechanical controller 20 controls the switch state of the switching valve group through gear transmission, connecting rod mechanism and cam mechanism according to the data of the gas detection device. When the coal powder concentration is high, the controller starts the screw pump 21. When the water content is high, the controller starts the centrifugal pump 22. When the methane concentration is high and the impurities are low, the controller starts the plunger pump 23. The switching valve group controls the switch state of the gas detection device through gear transmission and connecting rod mechanism. The connecting rod mechanism realizes the opening and closing and switching of the valve to ensure that the appropriate pump type is put into operation. In this way, through the multi-stage filtration design, large particles of coal powder, fine particles and liquid water in the coalbed methane are gradually removed to ensure that the gas is clean and stable. At the same time, the mechanical controller 20 is used to detect the coal powder concentration, water content and methane concentration of the coalbed methane in real time, and the screw pump 21, centrifugal pump 22 or plunger pump 23 is automatically switched according to the detection data to achieve efficient matching and operation of the pump type, which not only improves the effect of coalbed methane purification, but also optimizes the operation efficiency of the pump, reduces energy consumption and equipment loss, and provides a reliable guarantee for the efficient development of coalbed methane.

[0032] Although the embodiments of the present application 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 application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A pump type switching system based on coalbed methane development, characterized in that: include: A coalbed methane well (1), the top of which is fixedly connected to a cover plate (2); A detection box (3), wherein a first gas transmission pipe (4) is fixedly connected between the detection box (3) and the coalbed methane well (1), a fixing plate (6) is fixedly connected to the inner side of the detection box (3), a diaphragm pressure sensor (8) is fixedly connected to the upper side of the fixing plate (6), and a water content sensor (9) and a coal powder concentration sensor (10) are fixedly connected to the interior of the detection box (3); A filter box (11) having a second air supply pipe (12) fixedly connected thereto and the detection box (3); a filter screen housing (13) fixedly connected to the inner side of the filter box (11); and a terminal end of the second air supply pipe (12) located inside the filter screen housing (13); a centrifugal separator (14) and a gravity separator (17) fixedly connected to the inner side of the filter box (11); the centrifugal separator (14) and the inner side of the filter screen housing (13) being connected via a pipeline; and the gravity separator (17) and the centrifugal separator (14) being connected via a pipeline; A third air delivery pipe (19) is fixedly connected between the mechanical controller (20) and the gravity separator (17), and the other side of the mechanical controller (20) is connected to a screw pump (21), a centrifugal pump (22), and a plunger pump (23) via a pipeline.

2. The pump type switching system based on coalbed methane development according to claim 1 is characterized in that: The outside of the first gas delivery pipe (4) is fixedly connected to a first flow meter (5).

3. The pump type switching system based on coalbed methane development according to claim 1 is characterized in that: A discharge opening (7) is provided on the lower side of the fixed plate (6), and the discharge openings (7) are provided in two groups and are symmetrically arranged.

4. The pump type switching system based on coalbed methane development according to claim 1 is characterized in that: A waste pool (15) is installed on one side of the filter box (11); a first sewage pipe (16) is fixedly connected to the outside of the centrifugal separator (14); a second sewage pipe (18) is fixedly connected to the outside of the gravity separator (17); and the ends of the first sewage pipe (16) and the second sewage pipe (18) both pass through the outside of the filter box (11) and extend into the waste pool (15).

5. The pump type switching system based on coalbed methane development according to claim 1 is characterized in that: A second flow meter (24) is fixedly mounted on the pipeline connecting the screw pump (21), the centrifugal pump (22) and the plunger pump (23) with the mechanical controller (20).

6. The pump type switching system based on coalbed methane development according to claim 1 is characterized in that: A spring-type regulating valve (25) is fixedly installed on the pipeline connecting the screw pump (21), the centrifugal pump (22) and the plunger pump (23) with the mechanical controller (20).

Images