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Spray nozzle and underground coal gasification method

An underground gasification and sprinkler technology, which is applied to coal gasification, underground mining, injection devices, etc., can solve the problems of uneven gasification of underground passages and low recovery rate of coal resources, and achieve the effect of improving recovery rate and expanding evenly.

Active Publication Date: 2014-01-29
ENN SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With this nozzle, the gasification agent cannot be sprayed to both sides and the front at the same time, which will cause uneven gasification of the underground passage, resulting in a low recovery rate of coal resources

Method used

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  • Spray nozzle and underground coal gasification method
  • Spray nozzle and underground coal gasification method
  • Spray nozzle and underground coal gasification method

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Embodiment Construction

[0025] The specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0026] Reference figure 1 , The spray head of an embodiment of the present invention includes: a housing 1, wherein the housing 1 includes a first part 8 and a second part 9, the first part 8 and the second part 9 are in fluid communication through the front hole 10, in the second part A side hole 6 is provided on the side wall of 9. Further reference figure 1 The spray head also includes a sealing assembly 3 that can slidably open and close the front hole 10 and the side hole 6 in the housing 1, and a spring 2 arranged between the housing 1 and the sealing assembly 3.

[0027] Specifically, a support 7 is provided at one port of the first part 8 of the housing 1. The port is a port away from the second part 9. One end of the spring 2 is connected to the support 7, and the other end of the spring 2 is connected to the seal. Component 3. In other words, t...

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Abstract

The invention relates to a spray nozzle. The spray nozzle comprises a casing which comprises a first portion and a second portion; the first portion is in fluid communication with the second portion through a front hole; the side wall of the second portion is provided with a side hole; the spray nozzle also comprises a sealing assembly and a spring; the front hole and the side hole can be opened and closed in the casing in a sliding mode through the sealing assembly; the spring is arranged between the casing and the sealing assembly. The invention also relates to an underground coal gasification method using the spray nozzle. The underground coal gasification method comprises the steps of adjusting the injection flow rate and the injection pressure of a gasification agent and the pressure of the gas outlet channel opening and controlling the opening and closing of the front hole and the side hole of the casing. The front hole and the side hole can be alternately or simultaneously opened selectively without manual operation through the spray nozzle. In the process of underground coal gasification, the gasification working surface can be guided to move through the opening of the front hole of the spraying nozzle, reinforcement gasification can be performed on coal seams which are arranged on the bilateral sides of a gasification channel through the opening of the side hole, and accordingly the extension towards the bilateral sides of the gasification channel can be uniform and the recovery rate of coal resources can be improved.

Description

Technical field [0001] The invention relates to a nozzle and an underground coal gasification method using the nozzle. Background technique [0002] Underground coal gasification is a process in which gasification channels are formed in coal seams by drilling holes, gasification agents are injected into the gasification channels and the coal seams are ignited, and the coal is converted into coal gas under thermal and chemical effects and transported to the ground. . In the process of underground coal gasification, in order to avoid blockage of the underground gasification channel caused by the roof of the combustion zone due to unsupported falling after a large amount of coal is gasified, or the combustion of the coal seam does not proceed along the existing channel, it is currently relatively Reverse gasification or reverse combustion is often used, that is, the direction of combustion expansion is opposite to the direction of gasification agent injection. [0003] The controlle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/295
CPCE21B41/0078E21B43/243B05B1/005B05B1/3006E21B43/295
Inventor 陈峰潘霞
Owner ENN SCI & TECH DEV
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