What is dry powder fire extinguisher made of?
Dry powder extinguishing agent mainly through under the action of pressurized gas sprayed powder and mixed flame contact, occurs when the physical and chemical action: one is inorganic salt powder in * volatile decomposition products, and fuel combustion in the process of free radicals or reactive group chemical inhibition and side catalytic effect, the the interruption of the chain reaction of combustion fire; two is the dry powder * falls on the combustible surface, chemical reaction, and the formation of a layer of high temperature glass layer to isolate oxygen, and suffocate the fire. In addition, there are some dilute oxygen and cooling effect.
It is widely used in fire extinguishing agent, and mainly used in fire extinguishers. Except for dry chemical fire extinguishing agent for metal, powder extinguishing agent is generally divided into BC powder extinguishing agent and ABC powder two categories. Such as sodium bicarbonate powder, modified sodium potassium phosphate powder, powder, two dry powder, ammonium hydrogen phosphate, diammonium hydrogen phosphate powder powder and amino powder extinguishing agent.
Dry powder fire extinguisher is filled powder extinguishing agent powder extinguishing agent is fine powder drying and easy flowing for fire fighting, fire extinguishing effectiveness with inorganic salt and a small amount of additives that are dried, crushed and mixed into fine powder.
