Dry powder extinguishing agent

Abstract

The invention discloses a dry powder extinguishing agent which comprises the following components of, by weight, 10-15% of sodium bicarbonate, 10-15% of potassium salt, 10-15% of ammonium dihydrogen phosphate, 8-10% of mica powder, 5-8% of white carbon black, 8-10% of silicone oil, 1-3% of magnesium hydroxide, 1-3% of aluminum hydroxide, 20-30% of expanded perlite powder, 6-12% of calcium carbonate, 3-5% of sodium chloride and 1-5% of paraffin. In the dry powder extinguishing agent, in addition to the conventional ammonium dihydrogen phosphate and white carbon black, the expanded perlite powder which is of a honeycomb structure is also added and can serve as a carrier of a dry powder fire extinguishing material, and can be filled with a large amount of fire extinguishing dry powder; and when the expanded perlite carrying other components is sprayed onto an ignition point, the expanded perlite is further crushed at a high temperature, and covers the ignition point together with other materials to form a compact fire extinguishing layer, thereby achieving the purpose of extinguishing fire.

Description

technical field [0001] The invention specifically relates to a dry powder fire extinguishing agent. Background technique [0002] Dry powder fire extinguishing agent is a dry and easy-flowing ultra-fine powder used for fire extinguishing. It is composed of inorganic salt with fire extinguishing function and a small amount of additives after drying, crushing and mixing to form a fine solid powder. The main fire extinguishing ingredient in the dry powder fire extinguishing agent is ammonium phosphate. Ammonium phosphate has strong hygroscopicity, and it is easy to agglomerate and cannot keep the fire extinguishing agent in a loose powder state for a long time. The gas and powder can be mixed and sprayed quickly and evenly. In order to enhance the fluidity of the fire extinguishing agent, people add silicone oil with hydrophobic function to the fire extinguishing agent for siliconization treatment, so as to improve the dry powder fire extinguishing agent in a certain storage pe...

AI Technical Summary

Problems solved by technology

[0003] However, the existing dry powder fire extinguishing agent still needs to be strengthened to cover the flame, and cannot form a relatively stable covering layer on the flame point. Under the high temperature of the flame, the covering layer formed by the fire extinguishing agent will produce cracks, so that the fire has a strong Resurgence Possibility