Method for separating gas

A gas and goaf technology, which is applied in earth-moving drilling, production of fluids, wellbore/well components, etc., can solve the problems of low efficiency, increased number of separation devices, and high separation cost, and achieves low separation cost, energy saving, The effect of high separation efficiency

Active Publication Date: 2013-04-24
CHINA SHENHUA ENERGY CO LTD
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Problems solved by technology

If the low-concentration gas is separated, the number of separation devices will be greatly increased, the separation cost will be high, and the efficiency will be very low

Method used

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  • Method for separating gas

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Embodiment Construction

[0030] Combine below figure 1 The method of the present invention will be further described in detail, but the present invention is not limited to the following.

[0031] According to the different goaf conditions of each mine, the goaf 1 with very isolated conditions is selected, mainly for complete isolation from other areas of the mine. In addition, the goaf should be far enough from the surface, and the surface soil layer should be thick, so that It can ensure the complete isolation of the goaf, prevent the occurrence of gas explosions in the goaf, spontaneous combustion of floating coal and other phenomena, and the impact on other areas of the mine when disasters occur, and also ensure that disasters are easy to close and deal with.

[0032] All the outlets 2 and 8 connected to the goaf 1 are all built with waterproof, fireproof and explosion-proof airtight walls 3 . There must be enough isolated coal pillars 7 and isolated coal pillar boundaries 6 between the surroundin...

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Abstract

The invention provides a method for separating gas. The method comprises the following steps of: (1) building enclosed wall bodies at all exits of an isolated worked out section to fully isolate the worked out section from the outside; (2) arranging a gas inlet pipeline in at least one enclosed wall body on the lower part of the worked out section; (3) connecting pumped gas with the gas inlet pipeline at the inner side of the enclosed wall body through a fire arrestor at the outer side of the enclosed wall body; (4) forming at least one drill hole in a fissure zone on the upper part of the worked out section to collect enriched gas; and (5) connecting the drill hole with a gas outlet pipeline through the fire resistor. By adopting the method, huge inbreak space of the underground worked out section is fully utilized, natural separation of gas from the air is realized by using the property that gas is lighter than the air under the condition of low separating cost, the concentration oflow-concentration gas with high separation cost by using a manual device is increased to be over than 40 percent, and 100 percent separation and purification of gas pumped from a mine is realized.

Description

technical field [0001] The invention relates to the field of coal mining, in particular to the field of gas separation and purification in coal mining. Background technique [0002] In the process of coal mining, a large amount of gas in the coal seam flows into the mining space, and mine ventilation is one of the basic means of gas control to remove mine gas. Such a large amount of gas is discharged to the atmosphere with the main ventilator of the mine, which causes great pollution to the atmospheric environment while wasting precious gas energy. [0003] In the process of coal mining, it is very important to extract and utilize coal seam gas and prevent gas from causing damage to the atmospheric environment. [0004] One of the most important methods in gas utilization is gas separation and purification. The current three major gas separation technologies are membrane separation, pressure swing adsorption and cryogenic separation. The current economical and applicable ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/34
Inventor 周成军
Owner CHINA SHENHUA ENERGY CO LTD
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