Gas injection device, coal underground gasification system and coal underground gasification method

A technology for underground gasification and coal, applied in coal gasification, underground mining, construction and other directions, can solve the problem of not realizing the effect of improving the composition of gas, and achieve the effects of reducing production costs, improving quality, and improving effective components

Active Publication Date: 2014-03-26
ENN SCI & TECH DEV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In summary, the method of this patent does not send water vapor into the gasification channel, so it does not achieve the effect of improving the gas composition

Method used

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  • Gas injection device, coal underground gasification system and coal underground gasification method
  • Gas injection device, coal underground gasification system and coal underground gasification method
  • Gas injection device, coal underground gasification system and coal underground gasification method

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Embodiment Construction

[0028] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0029] refer to figure 1 , an embodiment of the gas injection device 12 for underground coal gasification of the present invention, which includes: a water injection pipe 1 and a cylindrical atomizer 2, the two ends of which are respectively set as an open open end and a closed closed end, And nozzles are arranged on the wall around its axis, wherein the outlet of the water injection pipe 1 is in fluid communication with the open end of the cylindrical atomizer 2 .

[0030] Such as figure 1 Shown is that the gas injection device 12 is used in an exemplary formation, the formation descends from the ground to the upper cover layer 18, the aquifer layer 17, the roof rock layer 16 and the coal seam 18, and the air intake channel 5 is penetrated by the ground into the coal seam 15, and communicate with the gasification passage 7 in the coal seam 18, the co...

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Abstract

The invention relates to a gas injection device used for coal underground gasification. The gas injection device comprises water injection tubes and cylindrical atomizers, and nozzles are arranged on walls of the cylindrical atomizers around axes of the cylindrical atomizers. Further, the invention provides a coal underground gasification system, and the gas injection device is arranged on the system. The invention further provides a coal underground gasification method using the gas injection device; in the method, the gas injection device sprays water mist into a gas inlet passage so as to absorb heat in the gas inlet passage to generate vapor to fill into a gasification passage; the nozzles of the atomizers of the gas injection device spray liquid water in a atomizing manner into an inner wall of the gas inlet passage, and after transferring heat with the inner wall of the gas inlet passage, the liquefied water is further atomized to generate the vapor for participating coal bed gasification reaction on a gasification working face. Therefore, the vapor is effectively guaranteed to enter the gasification passage, temperature of the gasification working face is controlled, and constituent content of effective gas in coal gas is improved. By the aid of the coal underground gasification system, effective recycling of sewage produced by gasification can be achieved.

Description

technical field [0001] The invention relates to a gas injection device, an underground coal gasification system and an underground coal gasification method. Background technique [0002] Underground coal gasification is an energy conversion technology that efficiently and cleanly utilizes low-quality coal resources. It is a process in which underground coal is directly burned in a controlled manner, and combustible gas is generated through thermal and chemical effects on coal. Due to the difference in hydrogeological conditions of different coal seams, the effect of underground coal gasification technology after implementation is different. Especially in coal seams rich in water, because the coal seam gasification process is a chemical process of self-expansion in volume, a large amount of heat is released during the coal seam combustion process, and the heat released makes a large amount of water in the coal seam vaporize to form water vapor, and in the During the volume e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/295
Inventor 梁杰席建奋刘淑琴钱路新王张卿崔勇梁鲲
Owner ENN SCI & TECH DEV
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