Environment-friendly fire extinguishing agent and preparation method

Abstract

The invention discloses an environment-friendly fire extinguishing agent and a preparation method. The environment-friendly fire extinguishing agent is prepared from the following components in percentage by mass: 0 to 5 percent of trifluoromethane, 30 to 81 percent of heptafluoropropane, 15 to 56 percent of pentafluoroethane, 2 to 15 percent of auxiliary agent and 2 to 12 percent of inert gas, wherein the auxiliary agent is a mixture consisting of 1 to 14.8 percent of at least one of trichloromethane, cis-1-chloro-3, 3, 3-trifluoropropene and trans-1-chloro-3, 3, 3-trifluoropropene, 0.002 to2 percent of at least one of magnesium hydroxide and magnesium oxide, and 0.1 to 1 percent of sodium bicarbonate. The production cost is reduced, the saturated vapor pressure of the system is improved, and the additive is added to generate a positive synergistic fire extinguishing effect with other fire extinguishing agents in the fire extinguishing process so that the fire extinguishing efficiency of the fire extinguishing agent is greatly improved, and the harm to the environment, equipment and human bodies is reduced.

Description

Technical field [0001] The invention belongs to the technical field of fire extinguishing agents. Background technique [0002] "Halon" fire extinguishing agents refer to fire extinguishing agents containing halogenated alkanes such as bromine and chlorine. The more widely used "halon" fire extinguishing agents mainly include 1301 and 1211. The fire extinguishing mechanism of the "halon" fire extinguishing agent in the flame extinguishing process is: the halogenated substance decomposes in the high temperature of the flame to produce active free radicals Br· and Cl·, which can capture the OH·, H· generated by the combustion reaction, and make the combustion process more effective. The chain reaction is interrupted to extinguish fire, which belongs to chemical suppression fire extinguishing. Because the free radical reaction speed is extremely fast, the fire extinguishing efficiency of halon fire extinguishing agent is very high. "Halon" fire extinguishing agent has been widely ...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, Chinese patent CN201610651792.8 discloses a method including 2-bromo-3,3,3-trifluoropropene, 1,1,2,2,3,3,4-heptafluorocyclopentene Alkanes, organic alcohol additives and inorganic amine additives gas fire extinguishing agent composition, but the corrosion to metals, especially the corrosion of 65Mn, 5082 aluminum alloy is still strong, and the production cost is higher, in addition, each component After mixing, it is necessary to add acetic acid or sodium hydroxide to adjust the pH to 7.0-8.5, and the process is more complicated

In British Patent UK1603867, Thacker discloses the composition of Halons 11 (CFC11) and Halons 12 (CFC12) and a kind of monoterpene, namely a kind of essential oil or citrus kernel oil, as a kind of fire extinguishing agent, fire extinguishing is efficient, but Halons 11 and Halons 12 are harmful to the ozone layer

Chinese patent CN201710580534.X discloses a fire extinguishing agent comprising 5% to 15% 2-bromo-3,3,3-trifluoropropene (BTP), 85% to 95% hydrofluoroalkane fire extinguishing agent or inert gas fire extinguishing agent Gas fire extinguishing agent mixture, but the patent does not effectively deal with brominated hydrocarbons and hydrogen bromide, which are toxic and harmful to the environment during the combustion process

Chinese patent CN201410033124.X discloses a mixture fire extinguishing agent containing trifluoromethane, hexafluoropropane and heptafluoropropane, wherein the volume concentration of trifluoromethane is as high as 15-22%, which is relatively polluting to the environment, and the mixture described in the patent is saturated The vapor pressure is low, and the volume required to fill the tank to the specified pressure with inert gas is large

[0004] The fire extinguishing agents disclosed in the above-mentioned patents have disadvantages such as low fire extinguishing efficiency, serious environmental pollution, large tank filling volume, or high price, which is not conducive to industrial production. Alternative products have become a hot issue in the field of fire protection

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