Nitrogen inhibition vapor fog preparation method and system for preventing spontaneous combustion of coal in underground goaf

Abstract

The invention discloses a method and a system for preparing a nitrogen-inhibiting vapor mist for preventing coal spontaneous combustion in an underground goaf. The system includes a water supply pipeline, a nitrogen injection pipeline, an inhibitor liquid storage tank, a suction hose, and an inhibitor adding device , spiral atomization device, observation hole and perfusion pipeline; the inhibitor adding device uses the principle of high-speed water jet vaporization to add the inhibitor accurately and quantitatively. This method ensures the stable and reliable addition of the inhibitor and overcomes the conventional addition method It is greatly affected by pressure fluctuations and the system is unstable; it has strong intrinsic safety in the underground, and the whole set of resistance vapor mist preparation device has the characteristics of small size, light weight, simple operation and high reliability. Assembly, movement and maintenance It is very convenient, greatly simplifies the operation of the preparation process of underground nitrogen gas resistance vapor mist, improves the field applicability of resistance gas mist fire extinguishing technology, and the large flow resistance vapor mist produced is very suitable for controlling coal spontaneous combustion hidden fires in underground goafs source.

Description

technical field [0001] The present invention is a preparation method and system of nitrogen gas barrier gas mist for preventing coal spontaneous combustion in underground gobs, and relates to a preparation method of gas barrier gas mist for fire prevention and extinguishing in coal mines, belonging to the field of coal mine safety technology, and is especially suitable for controlling coal spontaneous combustion in underground mines The high-position concealed fire source in the large-space goaf caused by it. Background technique [0002] In the process of coal mining, the mine fire caused by coal spontaneous combustion is the main natural disaster. The result of chemical changes; the goaf is the subsidence empty area formed behind the working face after the coal seam is mined. Coal spontaneous combustion in goaf areas has the characteristics of wide distribution of fire areas, fast development speed, many air leakage channels, concealed fire source points, and easy recombu...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method and process system for the preparation of nitrogen resistance vapor mist for spontaneous combustion of coal in goafs in coal mines, in order to overcome the shortcomings of the existing resistance vapor mist technology in preparation process operation and on-site implementation

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