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Method for making natural gas by underground coal bed microorganism

A natural gas and microorganism technology, applied in coal gasification, underground mining, construction, etc., can solve the problems of non-reusable coal resources, suboptimal energy utilization rate, low coal gasification conversion rate, etc., and improve the utilization of coal resources. The effect of high degree of conversion, high conversion rate, and improved drainage capacity

Inactive Publication Date: 2012-12-26
江苏君东新材料科技发展有限公司
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Problems solved by technology

The disadvantage of this method is that the gasification conversion rate of coal is low, generally lower than 70%, and the utilization rate of energy is not optimal, and the coal resources in the gasification area after gasification cannot be reused.

Method used

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  • Method for making natural gas by underground coal bed microorganism
  • Method for making natural gas by underground coal bed microorganism

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Embodiment Construction

[0024] The technical solution of the present invention will be described below through an embodiment according to the detailed process.

[0025] Step 1: Select the pre-mining area of ​​a certain coalfield as the area where coal-to-gas is implemented, and open an isolation zone between the areas to isolate it from other areas, and circulate and inject air into this area. The amount of air injected should ensure that the isolation zone The oxygen reduction potential of the coal surface is higher than 500mV.

[0026] The second step: analyze the coal quality, ground temperature, hydrological conditions, oxygen content, etc. of the coal seam in the first step gasification area, and obtain the coal seam environmental characteristic data.

[0027] Step 3: Prepare the culture medium. The composition of each element in the conventional culture medium is shown in the table below.

[0028] element ConcentrationMol / L N 0.0187 P 0.0042 S 0.0198 ...

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Abstract

The invention discloses a method for making natural gas by underground coal bed microorganism. Mainly, culture solution is utilized to cultivate and activate flora existing in the coal bed to convert underground methane flora into methane gas. The invention not only can convert coal into methane to serve as natural gas but also can improve the air permeability of the coal bed in the gas making process, so that the invention has an important meaning for improving the drainage capability of methane and ensuring upper safe extraction; more importantly, percent conversion is high, and converted coal bed resource can be reused so as to overcome the defects of the existing hot gasification method that percent conversion is low, and coal resource in the gasification area can not be reused after gasification ends.

Description

technical field [0001] The invention belongs to underground coal-to-gas technology, in particular to the technology of using underground coal seam microorganisms to produce natural gas (its main component is methane gas). The method uses microorganisms to absorb and degrade coal to achieve the purpose of converting coal to gas. Background technique [0002] At present, coal, as a precious energy resource, is mainly used through mining. In order to realize the full recovery of coal seam resources that are difficult to mine, as one of the projects of the plan, my country has invested a lot of money in long-term coal-to-gas technology. exploration and research. [0003] The existing underground coal-to-gas technology is mainly thermal vaporization. The method is to build a combustion furnace or a gasifier underground to realize the gasification of coal. The disadvantage of this method is that the conversion rate of coal gasification is low, generally lower than 70%, the utili...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/295
Inventor 肖栋萨迪・哈波兰尼
Owner 江苏君东新材料科技发展有限公司
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