Device and method for improving coal bed gas desorption efficiency with microwaves

A technology of coalbed methane and microwave, which is applied in the field of devices for improving the desorption efficiency of coalbed methane, and the field of devices for improving the desorption efficiency of coalbed methane by using microwaves. problem, to achieve the effect of improving the analysis volume and analysis speed, reliable performance, and simple operation

Inactive Publication Date: 2014-04-02
LIAONING TECHNICAL UNIVERSITY
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Problems solved by technology

The above method destroys the coal body structure and increases the number or width of coal body fissures to achieve the purpose of increasing t...

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  • Device and method for improving coal bed gas desorption efficiency with microwaves

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Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] Such as figure 1 As shown, a device that uses microwaves to improve the desorption efficiency of coalbed methane includes a microwave-excited coalbed methane desorption seepage experimental device 19 and a coal-rock triaxial pressurized adsorption-desorption system 20; the coal-rock triaxial pressurized adsorption-desorption system 20 consists of a first , second and third pressure regulating valves, methane cylinder 21, nitrogen cylinder 24, confining pressure gauge 27, axial pressure gauge 29, pore pressure gauge 23, valve 30, flowmeter 31 and temperature control gauge 32 The upper pressure head inlet hole 161 of the microwave excitation coalbed methane desorption seepage test device 19 is connected with the methane gas cylinder 21 through the gas pipeline, and the gas pipeline between the upper pressure head inlet hole 161 a...

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Abstract

The invention relates to a device and a method for improving coal bed gas desorption efficiency with microwaves, and belongs to the technical field of coal mine safety production. The device and the method allow the generated microwaves to act on a coal body, have a triaxial loading function, simulate a stress state of the coal body and a gas absorption and desorption process, obtain a coal body desorption rule by the action of the microwaves, and provide reference data for effective drainage and comprehensive utilization of the coal bed gas. The device comprises a microwave excitation coal bed gas desorption seepage experimental device and a triaxial coal rock pressed absorption and desorption system, wherein the triaxial coal rock pressed absorption and desorption system consists of a first pressure regulating valve, a second pressure regulating valve, a third pressure regulating valve, a methane gas cylinder, a loading gas cylinder, a confining pressure gauge, an axial pressure gauge, a pore pressure gauge, a flowmeter and a temperature control meter. The method for improving the coal bed gas desorption efficiency with the microwaves comprises the following steps of performing an absorption experiment, and performing a microwave excitation desorption experiment.

Description

technical field [0001] The invention belongs to the technical field of coal mine safety production, and relates to a device and a method for improving the desorption efficiency of coal bed gas, in particular to a device and a method for improving the desorption efficiency of coal bed gas by using microwaves. Background technique [0002] With the gradual development of my country's coal mine resources mining to the deep, the gas content in the coal body gradually increases, the permeability of the coal body and the gas desorption capacity decrease, resulting in a sharp increase in the difficulty of gas drainage, and the coalbed methane accumulated in the coal seam seriously affects the safety of coal mine production. [0003] In order to conduct gas drainage reasonably, conventional methods such as drilling and hydraulic fracturing are mostly used at present. Increasing the number and density of coal seam boreholes can increase the amount of gas drainage to a certain extent;...

Claims

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Application Information

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IPC IPC(8): G01N30/00E21F7/00
Inventor 苏畅张永利程瑶由继国刘杰马玉林杨新乐
Owner LIAONING TECHNICAL UNIVERSITY
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