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Underground Coal Gasification System

An underground gasification and coal technology, applied in coal gasification, underground mining, construction, etc., can solve the problem of reducing the utilization rate of water or water vapor

Active Publication Date: 2018-01-16
ENN SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, most of the water or water vapor cannot participate in the water gas reaction, thus reducing the utilization rate of water or water vapor

Method used

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  • Underground Coal Gasification System
  • Underground Coal Gasification System
  • Underground Coal Gasification System

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Embodiment Construction

[0021] In order to further illustrate the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation, structure, features, and effects of the present invention will be described in detail below with reference to the drawings and preferred embodiments.

[0022] About the embodiment:

[0023] See figure 1 with figure 2 The gasification working face of the first preferred embodiment of the underground coal gasification system of the present invention includes an air inlet well 1, an inlet well 2 and a through well 4.

[0024] The gas inlet well 1 adopts a directional drilling horizontal well, which passes through the overlying strata 6 from one side of the coal seam 5 and then penetrates into the coal seam 5 to provide a gas injection (gasification agent) channel. The horizontal section of the intake well 1 is usually located 0.5-2m vertically above the floor of the coal seam 5. In this embodiment, the horizontal ...

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Abstract

The invention discloses a coal underground gasification system. The coal underground gasification system comprises a gas inlet well with a directional drilling level well, wherein a controllable and movable gas injection device is arranged in the gas inlet well and used for injecting a gasifying agent at a gas injecting point; a water inlet well with the directional drilling level well is used, the level section of the water inlet well is vertically above the level section of the gas inlet well, and a controllable and movable water injection device is arranged in the water inlet well and used for injecting water or steam at a water injecting point; the coal underground gasification system further comprises a control device which is used for controlling the gas injection device and the water injection device to be gradually receded in a corresponding distance, so that the water injecting point of the water injection device can be moved along the gas injecting point of the gas injection device to inject water or steam into the movable scorching area of the coal layer, and the utilization rate of water or steam can be improved.

Description

Technical field [0001] The invention relates to the field of coal mining, in particular to an underground coal gasification system. Background technique [0002] Underground Coal Gasification (Underground Coal Gasification) is a process in which coal in the ground is combusted in a controlled manner, and combustible gas is generated through thermal and chemical effects on the coal. In the process of underground coal gasification, it is necessary to inject gasification agent and water or steam. The water or steam is used to react with the hot coal seam to generate hydrogen and carbon monoxide. [0003] In the prior art, such as the underground coal gasification system disclosed in patent application 2013100641272.5, the water or steam injection point is fixedly arranged in the intake channel, and the injected water or steam enters the gasification channel along with the gasification agent. In the gasification process, the hot coal seam is usually located above its gas injection poi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/295
CPCE21B43/295
Inventor 贺岩
Owner ENN SCI & TECH DEV