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Extraction and utilization system for low-concentration coalbed methane of surface drilling

A technology for ground drilling and coalbed methane, which is applied in earth-moving drilling, mining fluids, mining equipment, etc., can solve the problems of aggravating the greenhouse effect, failing to obtain economic benefits, wasting energy, etc., and achieving the effect of a simple system structure

Inactive Publication Date: 2019-01-04
TAIYUAN UNIV OF TECH
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  • Abstract
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  • Claims
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Problems solved by technology

The direct emptying of a large amount of low-concentration coal-bed methane not only intensifies the greenhouse effect, but also wastes precious energy, and cannot obtain the greatest economic benefits

Method used

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  • Extraction and utilization system for low-concentration coalbed methane of surface drilling

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Embodiment Construction

[0010] The present invention will be further described below in conjunction with accompanying drawing.

[0011] figure 1 As shown, a ground drilling low-concentration coalbed methane extraction and utilization system includes a first valve 2, a methane concentration sensor 3 sequentially connected to the pipeline 1, and parallel branch pipes connected between the methane concentration sensor 3 and the water ring vacuum pump 10. The parallel branch pipeline is connected in parallel with the first electric valve 5, and the parallel branch pipeline is provided with a second electric valve 6, a filter 7, a dryer 8 and a purification device 9 in sequence;

[0012] The water ring vacuum pump 10 is connected to a screw booster pump 11, and the screw booster pump 11 is connected to a gas flowmeter 13. A methane concentration detector 12 is installed between the screw booster pump 11 and the gas flowmeter 13, and the gas flowmeter 13 is connected to a second valve. 14. The second valv...

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Abstract

Provided in the invention is an extraction and utilization system for low-concentration coalbed methane of surface drilling. The system that is suitable for extraction and utilization of low-concentration coalbed methane of surface drilling comprises a pipeline, a first valve, a methane concentration sensor, a controller, a first electric valve, a second electric Valve, a filter, a dryer, purification equipment, a water ring vacuum pump, a screw booster pump, a methane concentration detector, a gas flow meter, a second valve, a collecting pipe network, and a connecting line. The methane concentration sensor, the gas flow meter, and the methane concentration detector monitor extraction parameters of coalbed methane of surface drilling; and the first electric valve and the second electric valve are regulated by a program set in the controller. The system has advantages of simple structure and safe and efficient extraction of coalbed methane.

Description

technical field [0001] The invention relates to a ground drilling coal bed gas extraction and utilization system, which is especially suitable for the extraction and utilization of low-concentration coal bed gas from ground drilling and high-efficiency pressurized collection and transportation. Background technique [0002] Coalbed methane surface drilling CBM extraction can not only reduce mine gas, ensure safe and efficient coal mining, but also make full use of coalbed methane resources and alleviate the current energy shortage situation. In the middle and late stages of surface drilling coalbed methane extraction, the methane concentration will be reduced to 30% or even lower, while the CH 4 The explosion limit is 5%-16%. When methane is pressurized and collected, the explosion limit will increase significantly. Therefore, for safety reasons, when the methane concentration is within 30%, it cannot be used for gathering and transferring through a booster. At present, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F7/00E21B43/00
Inventor 胡胜勇郝国才冯国瑞张奡邵和韩丹丹黄宜生廖奇关舒文
Owner TAIYUAN UNIV OF TECH
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