Gas-liquid-solid three-phase fire extinguishing method and device

Abstract

The invention relates to the technical field of fire extinguishing, and in particular, relates to a gas-liquid-solid three-phase fire extinguishing device which comprises a gas source, a mixture preparation cavity channel, an outlet system and low-temperature-resistant pipelines; the gas source is composed of a CO2 Dewar tank and an N2 Dewar tank; the CO2 Dewar tank is communicated with the mixture preparation cavity channel through the low-temperature-resistant pipeline provided with a flow regulating valve; the N2 Dewar tank is respectively communicated with a nucleating agent atomizer and the mixture preparation cavity channel through the low-temperature-resistant pipeline provided with a flow regulating valve, and the low-temperature-resistant pipeline provided with a flow regulating valve is arranged between the nucleating agent atomizer and the mixture preparation cavity channel; and the outlet system is composed of a throat, an anti-blocking supercharger and an outlet, and the anti-blocking supercharger and the throat are used for pressurizing the mixture preparation cavity. Three-phase mixture formed by CO2 gas, liquid nitrogen and dry ice particles is used for extinguishing fire, the cooling speed is increased by several times and even dozens of times, and the fire extinguishing effect is good.

Description

technical field [0001] The invention relates to the technical field of fire extinguishing, in particular to a gas-liquid-solid three-phase fire extinguishing method and device. Background technique [0002] Fire is one of the most common and frequent types of disasters in various accidents. Once there is no control and prevention, it will easily pose a huge threat to the safety of people's lives and properties. Traditional fire extinguishing technologies include: inert gas fire extinguishing technology, dry powder fire extinguishing technology, foam fire extinguishing technology, etc. The above technologies are widely used in the prevention and control of fire accidents due to their excellent fire extinguishing performance, but their shortcomings are also obvious. Inert gas fire extinguishing technology In the process of jet flow, pure gas entrains a large amount of air, resulting in a rapid decrease in jet velocity, limited coverage of the fire area, and the heat transfer ...

AI Technical Summary

Problems solved by technology

The above technologies are widely used in the prevention and control of fire accidents due to their excellent fire extinguishing performance, but their shortcomings are also obvious

Inert gas fire extinguishing technology In the process of jet flow, pure gas entrains a large amount of air, resulting in a rapid decrease in jet velocity, which limits the coverage of the fire area, and the heat transfer coefficient between gas and solid is usually small, so the cooling effect on Class A fires is limited. prone to re-ignition

Foam fire extinguishing is an essential fire-fighting facility in chemical plants, gas stations and other places. This technology covers the fire area with foam to isolate oxygen to achieve the purpose of fire control. However, it is difficult to clean up the on-site residue after the fire is extinguished, so it cannot be applied to libraries, Computer rooms, museums, laboratories and other places of great value

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