1, foam extinguisher
Foam extinguisher is filled with sodium bicarbonate and aluminum sulfate solution respectively. When foam extinguisher is used, it is used upside down, so that the two solvents in the fire extinguisher can be fully combined to produce carbon dioxide foam. The carbon dioxide foam sprayed by the fire extinguisher has a small specific gravity and adheres to combustible materials, which has the effect of isolating air, thus putting out the fire. This kind of fire extinguisher can put out Class A and Class B fires.
2, dry powder fire extinguisher
Dry powder fire extinguisher means that the fire extinguisher bottle is filled with dry powder extinguishing agents such as ammonium phosphate and sodium chloride. These extinguishing agents and fuels will produce chemical inhibition and other effects, thus interrupting combustion. Moreover, the dry powder extinguishing agent will form a covering layer on the surface of combustible materials, which plays a role in isolating oxygen. ABC dry powder fire extinguishers can generally put out Class A, B, C and E fires. Bc dry powder fire extinguisher can extinguish Class B, C and E fires.
3, carbon dioxide fire extinguisher
This kind of fire extinguisher bottle usually contains liquid carbon dioxide. When a carbon dioxide fire extinguisher is used to extinguish a fire, liquid carbon dioxide will vaporize immediately and absorb the surrounding heat, thus achieving the effect of cooling down. Carbon dioxide gas will be distributed on the surface of combustible materials, and the effect of fire extinguishing can be achieved by reducing the oxygen concentration. Can be used to put out Class B, Class C and Class E fires.
4. Clear water fire extinguisher
Clear water fire extinguisher is filled with clear water, and additives such as antifreeze are added. This kind of fire extinguisher puts out the fire by the principle of cooling and suffocation. Clear water can absorb sensible heat and latent heat, which has a significant cooling effect. When water is heated, it forms steam, which can reduce the oxygen solubility in the fuel area and so on. Clear water fire extinguishers are mainly used to extinguish Class A fires.
5. Halon fire extinguisher
This fire extinguisher is filled with haloalkane extinguishing agent, such as difluoro dibromomethane, trifluoro-bromomethane, etc. This fire extinguisher can put out flammable gas, liquid fire, solid fire, electrical fire and thermoplastic fire. At present, 12 1 1 halon fire extinguishers and 130 1 halon fire extinguishers have been eliminated.
6, clean gas fire extinguisher
Clean gas fire extinguisher belongs to inert gas fire extinguishing system, including heptafluoropropane gas fire extinguishing system, IG-54 1 fire extinguishing system, etc. The inert gas filled in this fire extinguisher belongs to non-toxic, tasteless, inert and non-conductive compressed gas, which has high fire extinguishing efficiency and strong environmental protection, and can be used to extinguish Class A, B, C and E fires.