Efficient nitrogen injection and fire extinguishing system for mining

Abstract

The invention discloses an efficient nitrogen injection and fire extinguishing system for mining. The efficient nitrogen injection and fire extinguishing system comprises a refrigerating machine; an inlet and a liquid inlet of the refrigerating machine are communicated with the lower end of a three-way valve; an outlet of the refrigerating machine is connected with a liquid inlet of an atomizing nozzle through an inhibition liquid pipe; an inlet of the three-way valve is communicated with a gas inlet; an outlet of the three-way valve is communicated with a gas inlet of the atomizing nozzle through a nitrogen injection pipe; a gas pressure adjusting valve, a gas flow meter and a gas pressure meter are connected on the nitrogen pipe; the atomizing nozzle is connected with the back end of the nitrogen injection pipe, and can directly use the conventional nitrogen pipeline and the water transmission pipeline of a mining well. The efficient nitrogen injection and fire extinguishing system has a small occupied space, can be flexibly moved, and is simple in operation. The efficient nitrogen injection and fire extinguishing system can continuously work, and has multiple effects of cooling, inerting, inhibiting and atomizing. The efficient nitrogen injection and fire extinguishing system can be used for efficiently transporting low-temperature atomized nitrogen to a deep part of a fire extinguishing area, so that the technical problems that the nitrogen is easy to diffuse along with wind at a room temperature, the cooling effect is limited, and the fire extinguishing period is long can be solved. The efficient nitrogen injection and fire extinguishing system has wide practical applicability, and is applicable to underground fire extinguishing of a coal mine.

Description

technical field [0001] The invention relates to a nitrogen injection fire prevention device suitable for underground coal mines. Background technique [0002] Mine fires pose a great threat to the safe production of coal mines. In order to prevent mine fires, nitrogen fire prevention and extinguishing technology has been widely used at home and abroad since the 1970s. Inject nitrogen gas into the area to be treated. Under the combined action of nitrogen self-diffusion and air leakage pressure, nitrogen molecules will disperse around the broken coal body, reduce the oxygen content around the coal body, and prolong the oxidation cycle of the coal body, thereby diluting oxygen and inerting the coal. Body, the role of inhibition of combustion. The application of nitrogen fire prevention and extinguishing technology is becoming more and more common. However, nitrogen is easy to escape with the wind and cannot play a long-term fire prevention and extinguishing effect. Although ni...

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Problems solved by technology

[0005] In order to overcome the deficiency that the existing nitrogen anti-fire extinguishing device or fine water mist device cannot go deep into the fire area to fully exert the cooling and heat absorption effect of fine water mist, the present invention provides a high-efficiency nitrogen injection anti-fire extinguishing system for mines. The system injects nitrogen High fire prevention and extinguishing efficiency, with multiple functions of cooling, inerting, resisting and atomizing, and can send atomized nitrogen into the deep part of the fire zone

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