Novel dry powder extinguishing agent and preparation method thereof

Abstract

The invention discloses a novel dry powder extinguishing agent. The novel dry powder extinguishing agent comprises, by mass, 55%-65% of ammonium dihydrogen phosphate, 18%-20% of ammonium sulfate, 2%-6% of barium sulfate, 1%-3% of diatomite, 2%-5% of alums, 2%-5% of talcum powder, 2%-5% of mica powder, 2%-5% of sodium silicate, 1%-2% of silicone oil, 1%-3% of activated clay and 1%-3% of white carbon black. According to the novel dry powder extinguishing agent, the ammonium sulfate and ammonium phosphate are subjected to chemical contact reacting, the hygroscopic property of dry powder can be enhanced, and the fire extinguishing effect is improved; meanwhile, the white carbon black can form hydrophobic white carbon black after hydrophobization by the silicone oil, the hydrophobic white carbon black is matched with the alums and the activated clay, and thus the repellency of the dry powder extinguishing agent is improved; and the barium sulfate and the diatomite are of a porous structureand have good mobility, the specific surface area of fire extinguishing compositions can be increased, the dispersion effect is good, and therefore cost is reduced and fire extinguishing efficiency isimproved.

Description

technical field [0001] The invention relates to a novel dry powder fire extinguishing agent and a preparation method thereof, which are applied in the technical field of fire safety. Background technique [0002] Dry powder fire extinguishing agent is a kind of dry fine solid powder with good fluidity, which is mainly composed of one or more fine inorganic powders with fire extinguishing ability and various additives. Volatile decomposition products chemically inhibit and side-catalyze the free radicals or active groups produced by the fuel during the combustion process, which interrupts the chain reaction of combustion and extinguishes the fire; the second is formed by the fine powder falling on the surface of the combustion material under the action of high temperature A glass-like covering that blocks oxygen and suffocates the fire. However, the dry powder fire extinguishing agents currently on the market have poor water repellency, small specific surface area, and low a...

AI Technical Summary

Problems solved by technology

However, the dry powder fire extinguishing agents currently on the market have poor water repellency, small specific surface area, and low ability to capture free radicals, resulting in poor fire extinguishing performance and easy water absorption and deterioration.