Cold aerosol fire extinguishing device

Abstract

The invention relates to the field of fire extinguishing, in particular to a cold aerosol fire extinguishing device, which comprises a dry powder aqueous solution box, a carbon dioxide storage tank and a nozzle, wherein dry powder aqueous solution is stored in the dry powder aqueous solution tank, carbon dioxide is stored in the carbon dioxide storage tank, and a heating jacket covers the outer side of the nozzle. Further, the dry powder aqueous solution is a compound prepared by one or multiple of sodium carbonate, sodium bicarbonate, potassium bicarbonate, monobasic potassium phosphate, sodium chloride, potassium chloride, magnesium chloride, urea, ammonium bicarbonate and ammonium dihydrogen phosphate mixed according to an optional proportion, and is in a saturation state at minus five DEG C. The carbon dioxide storage tank is connected with the nozzle through a high-pressure pipeline provided with a valve, and the pressure of carbon dioxide at an inlet of the nozzle ranges from 7.5Mpa to 8.5Mpa. The dry powder aqueous solution tank is connected with the nozzle through a low-pressure pipeline provided with a water pump, and the pressure of dry powder aqueous solution at the inlet of the nozzle ranges from 0.35Mpa to 0.45Mpa. The mass flow ratio of water in the dry powder aqueous solution and carbon dioxide at the inlet of the nozzle ranges from 1:2.2-1:2.6.

Description

technical field [0001] The invention relates to the field of fire extinguishing, in particular to a cold aerosol fire extinguishing device. Background technique [0002] According to the "Montreal Protocol on Ozone Depleting Substances" formulated by the United Nations Environment Program (UNEP) in 1987 and subsequent revisions, the Chinese government promised to stop using Halon 1211 fire extinguishing agent from 2005 and stop production of 1301 from 2010. Extinguishing agent. At present, the more common gas fire extinguishing agents (techniques) that replace halon at home and abroad include: dry powder fire extinguishing agent, inert gas fire extinguishing agent, aerosol fire extinguishing agent and fine water mist fire extinguishing technology, etc. [0003] Dry powder fire extinguishing agent uses easy-flowing ultra-fine solid powder to extinguish the fire through the power given by the fire extinguisher or fire extinguishing equipment. The agent is susceptible to moi...

AI Technical Summary

Problems solved by technology

However, there are some defects in the hot aerosol fire extinguishing agent: one is that the reaction temperature when generating the hot aerosol fire extinguishing agent is higher, which easily causes thermal damage to personnel and equipment; Weaker, it is only suitable for full flooding fire extinguishing; third, the way of relying on pyrotechnic agent combustion to generate hot aerosol fire extinguishing agent is not suitable for pipe network fire extinguishing system

But there are still some problems, such as it is easy to extinguish large fires, but difficult to extinguish small fires; it is easy to extinguish Class B fires, but it is difficult to extinguish Class A fires; there are many water stains; the fire extinguishing system is generally immobile, etc.

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