Liquid nitrogen self-pressurization resistance chemical fire extinguishing system
A self-pressurization, anti-fire technology, applied in the direction of fire prevention, dust prevention, safety devices, etc., can solve the problems of fire hazards and safety, and achieve the effects of high fire prevention and extinguishing efficiency, small space occupation, and simple structure
Active Publication Date: 2015-09-16
CHINA UNIV OF MINING & TECH
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Problems solved by technology
[0004] In order to overcome the defects of fire hazards and poor safety left by the existing steam mist resistance and fire extinguishing system, the present invention provides a liquid nitrogen self-pressurization resistance and fire prevention system, which does not leave fire hazards and has high safety. High fire extinguishing efficiency
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[0011] exist figure 1 Among them, the lower part of the liquid nitrogen tank 1 is sequentially connected to the first steady flow valve 7-1, the cold branch pipe 3-1-1 of the heat exchanger 3, the first steady pressure valve 8-1, and the first pressure gauge 9- through the cryogenic pipe 10. 1 and the gas inlet of the two-phase nozzle 4, the lower part of the resisting liquid tank 2 is connected to the second steady flow valve 7-2, the hot branch pipe 3-1-2 of the heat exchanger 3, and the second stabilizing valve in sequence through the resisting liquid pipe 11 8-2, the second pressure gauge 9-2 and the liquid inlet of the two-phase nozzle 4, the upper part of the liquid nitrogen tank 1 is connected to the upper part of the resistance liquid tank 2 and the outlet of the cold branch pipe 3-1-1 of the heat exchanger 3 through a hose 6, The two-phase nozzle 4 is connected to the rear end of the nitrogen injection pipe 5 .
[0012] exist figure 2 Among them, the heat e...
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The invention discloses a liquid nitrogen self-pressurization inhibition fire extinguishing system. The liquid nitrogen self-pressurization and inhibition fire extinguishing system mainly comprises an inhibition fluid container, a liquid nitrogen container, a heat exchanger, an atomizer and liquid nitrogen pipes, wherein the lower part of the liquid nitrogen container is sequentially connected with a first constant-current valve, a cooling branch pipe of the heat exchanger, a first pressure maintaining valve, a first pressure gauge and a gas inlet of a double-phase nozzle through low-temperature pipes; the lower part of the inhibition fluid container is sequentially connected with a second constant-current valve, a heating branch pipe of the heat exchanger, a second pressure maintaining valve, a second pressure gauge and a liquid inlet of the double-phase nozzle through the liquid nitrogen pipes; the upper part of the liquid nitrogen container is connected with the upper part of the inhibition fluid container and the outlet of the cooling branch pipe of the heat exchanger through flexible pipes, and the double-phase nozzle is connected with the rear end of a nitrogen filling pipe. The system has multiple functions of cooling, inerting, inhibiting and atomizing; has high fire prevention and extinguishment efficiencies, does not contain electrical elements and is safe and reliable; is simple in structure, has a small volume, is convenient to move, occupies a small space and can be flexibly moved; and is used for extinguishing fire of underground coal mine gobs or enclosed spaces.
Description
technical field [0001] The invention relates to an anti-chemical anti-fire extinguishing device used for underground fire prevention and extinguishing in coal mines. Background technique [0002] Mine fires pose a great threat to coal mine safety production. Since the 1970s, nitrogen fire prevention and extinguishing technology has been widely used at home and abroad. Nitrogen gas is injected into the area to be treated. Nitrogen molecules disperse around the broken coal body, prolonging the oxidation cycle of coal body, thereby diluting oxygen, inerting coal body, and inhibiting combustion. role. However, nitrogen is easy to escape with the wind and cannot play a long-term role in preventing and extinguishing fires. At the same time, although nitrogen at room temperature can suppress fires, its cooling effect is limited and the fire extinguishing cycle is long. Since the 1990s, vapor-mist resistance and fire prevention technology has been applied in coal mines in my c...
Claims
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IPC IPC(8): E21F5/00
Inventor 周福宝李建龙史波波肖翔李敬张旭
Owner CHINA UNIV OF MINING & TECH