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Underground coal gasification system and gasification method

An underground gasification and coal technology, applied in coal gasification, underground mining, construction, etc., can solve the problems of reduced gasification efficiency, water vapor can not be effectively used, and gasifier production time is long, so as to improve the efficiency of gasification. The effect of reducing the production time, shortening the time to production, and reducing the amount of sewage

Active Publication Date: 2014-04-23
ENN SCI & TECH DEV
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Problems solved by technology

Its disadvantages are as follows: firstly, the method of gasification after piercing is adopted, which leads to a long time for the gasifier to reach production; secondly, when a certain section is pierced, shrinkage cavities are likely to occur in other unpenetrated channels; thirdly, the water vapor generated during the piercing process cannot is effectively utilized, reducing the gasification efficiency

Method used

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  • Underground coal gasification system and gasification method

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Embodiment Construction

[0019] figure 1 A schematic diagram of an embodiment of the underground coal gasification system of the present invention is shown. As shown in the figure, an underground coal gasification system is shown. The system includes a first channel 111 located in the coal seam 17, the two ends of the first channel 111 are respectively connected to the air outlet hole 12 and the auxiliary hole 11; and a second channel 112 is also included, and the two ends of the second channel 112 are respectively connected to the auxiliary hole 11 and the directional hole 10. The combustion oxidizer is fed through the directional hole 10, so that the second channel 112 forms a reverse through area; the gasification agent is fed through the auxiliary hole 11, so that the first channel 111 forms a forward gasification area.

[0020] The positions of air outlet hole 12, auxiliary hole 11 and orientation hole 10 are according to figure 1 Arrangement shown in positional relationship. Therefore, the f...

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Abstract

The invention provides an underground coal gasification system and a gasification method. The underground coal gasification system comprises a first channel located in a coal bed, and a second channel, wherein the two ends of the first channel are communicated with a gas outlet hole and a via hole respectively; the two ends of the second channel are communicated with the via hole and a directional hole respectively; a combustion improver is supplied by the directional hole; the second channel forms a reverse penetration area; a gasification agent is supplied by the via hole; and the first channel forms a forward gasification area. The invention aims at providing the underground coal gasification system and the gasification method which can synchronize a reverse penetration process and a forward gasification process.

Description

technical field [0001] The invention relates to the field of underground coal gasification, more specifically, to an underground coal gasification system and a gasification method. Background technique [0002] Underground coal gasification is a process in which coal in the ground is burned in a controlled manner, and combustible components are produced under thermal and physical and chemical effects, and transported to the ground. The wellless underground gasifier is formed by drilling holes from the ground to the coal seam, and directional drilling along the coal seam between the drill holes to open up gasification channels. [0003] According to the different moving modes of the gasification working face, it can be divided into reverse penetration and forward gasification. Reverse penetration is to use air or low-concentration oxygen-enriched as a combustion aid, and send it to the fire area at a low speed through directional holes or coal seam cracks, so that the flame ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/295
Inventor 梁杰席建奋钱路新刘淑琴赵丽梅王张卿崔勇梁鲲
Owner ENN SCI & TECH DEV
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