Mine liquid-CO2 fire preventing and extinguishing process and device

Abstract

The invention relates to a mine liquid-CO2 fire preventing and extinguishing process and device for preventing and extinguishing fire by conveying liquid CO2 to an underground fire zone and injecting a fire zone by using the liquid CO2 and utilizing the liquid CO2 to asphyxiate oxygen in the fire zone, cool, decrease temperature and inertly suppress explosion. A mine liquid-CO2 fire preventing and extinguishing system comprises a liquid CO2 tank car (1), a liquid CO2 storage tank (2), a carburetor (10), a self-pressurization pipeline, a liquid inlet and outlet pipeline, and the like; and the fire preventing and extinguishing device comprises the liquid CO2 storage tank (2), the carburetor (10), the self-pressurization pipeline, the liquid inlet and outlet pipeline, and the like, wherein the self-pressurization pipeline comprises a self-pressurization liquid outlet pipeline and a self-pressurization gas intake pipeline and is combined with the carburetor (10) to form a self-pressurization system so as to realize the self comprehension of pressure in the tank. The invention solves the technical problem of the gasification and icing in the liquid CO2 tank and the pipeline conveying process, realizes safe transfer, storage, transmission and injection and has the advantages of high extinguishment speed, simpleness of operation, low cost, operation stability, remarkable fire extinguishment and prevention effects, wide practicability and the like.

Description

1. Technical field [0001] The invention relates to a fire prevention and extinguishing technology, in particular to a fire prevention and extinguishing technology and device for preventing coal spontaneous combustion by using liquid carbon dioxide. 2. Background technology [0002] Mine fire is one of the main natural disasters in coal mines. And coal spontaneous combustion is the main form of mine fires. During the "Tenth Five-Year Plan" period, among the 657 key coal mines in the country, 54.9% of mines have coal seam spontaneous combustion tendency, and more than 50% of mines have a spontaneous combustion period within 3 months. There are nearly 400 fires caused by spontaneous combustion every year, and nearly 4,000 fire hazards caused by spontaneous combustion and oxidation of coal. Only the coal fields in northern my country have burned more than 4.2 billion tons of coal. At present, the fully-mechanized top coal caving technology has been vigorously promoted and applie...

AI Technical Summary

Problems solved by technology

Since the gaseous CO 2 Injection into the underground fire area, the cooling effect is not obvious, and the long-distance pipeline transportation is prone to pipeline leakage and other problems, which will also increase the workload of enterprise pipeline maintenance

Therefore, this technique is not suitable for converting liquid CO 2 Inject directly into the underground fire zone at close range

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