The functions of dry powder fire extinguishers are as follows: firstly, the reactive free ions produced by combustion products are eliminated, so that the chain reaction of combustion is interrupted; Second, when the dry powder decomposes at high temperature, it absorbs a lot of heat, releases steam and carbon dioxide, and cools and dilutes oxygen in the air in the combustion zone.
Extended data:
Principle of dry powder fire extinguisher: Dry powder fire extinguisher is equipped with dry powder fire extinguishing agent. Dry powder fire extinguishing agent is a kind of dry and easy-flowing fine powder used for fire extinguishing, which is composed of inorganic salts and a small amount of additives. It is dried, crushed and mixed into fine solid powder. Blow dry powder (mainly containing sodium bicarbonate) with compressed carbon dioxide to extinguish the fire.
Structure: Dry powder fire extinguisher is powered by carbon dioxide gas or nitrogen gas, and sprays dry powder in the bottle to extinguish the fire. Dry powder is a kind of dry, easy-flowing fine solid powder, which consists of fire extinguishing base material, moisture-proof agent, flow promoter, anti-caking agent and other additives.