What are the commonly used fire extinguishers?

Commonly used fire extinguishers include dry powder fire extinguishers, carbon dioxide fire extinguishers, foam extinguisher, 12 1 1 fire extinguishers. Dry powder fire extinguisher is equipped with dry powder 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.

Carbon dioxide fire extinguisher

Carbon dioxide fire extinguisher uses filled liquid carbon dioxide to spray the fire extinguisher. It consists of cylinder, bottle valve and injection system. The carbon dioxide fire extinguisher compresses liquid carbon dioxide in a small steel cylinder when it is pressurized, and then ejects it when it is put out, which has the function of cooling and isolating air. Carbon dioxide fire extinguishers are mainly used to put out the initial fires of valuable equipment, archives, instruments and meters, electrical equipment below 600 volts and oil.

foam extinguisher

There are two containers in foam extinguisher, which are filled with two liquids, namely aluminum sulfate and sodium bicarbonate solution. The two solutions do not contact each other, and no chemical reaction occurs. When foam extinguisher is needed, put the fire extinguisher upside down and mix the two solutions together, which will produce a lot of carbon dioxide gas.

12 1 1 fire extinguisher

12 1 1 The fire extinguisher uses nitrogen pressure in the steel cylinder to eject121extinguishing agent, which belongs to pressure storage type. 12 1 1 is the code name of dichloromethane, and its molecular formula is.