Foam fire extinguishing agent is a fire extinguishing agent that can be mixed with water, and can produce fire extinguishing foam through a certain chemical reaction or mechanical principle. The fire extinguishing mechanism of foam extinguishing agent mainly includes the cooling effect of water, the suffocation effect of foam to isolate air, and the blocking effect of foam. Mainly used for fighting non-water-soluble flammable liquid and general solid fires. Special foam extinguishing agent can also extinguish water-soluble flammable liquid fires. This is amazing! Foam fire extinguishing agents are generally composed of foaming agents, foam stabilizers, viscosity reducers, antifreeze agents, cosolvents, preservatives and water.
1. Asphyxiating effect, isolated from the air
Because the relative density of the foam is relatively small, it can float on the surface of combustible liquids, and can be attached to the surface of combustible solids to form a foam covering layer to isolate the surface of the burning material from the air. Achieve fire extinguishing effect.
2. Intercepting effect, strong ability to resist re-ignition
The foam layer can block the heat radiation of the flame to the surface of the burning material, reduce the evaporation rate of the combustible liquid or the thermal decomposition rate of the solid, and make it difficult for the combustible gas to enter the combustion zone. Achieve fire extinguishing effect.
3. Cooling effect, lower temperature
The foam structure formed by the foam fire extinguishing agent can be used as a kind of "radiator", the foam will carry a lot of water, and the foam liquid can adhere to the combustible surface better than water, especially the vertical surface. The foam produces a wetting effect on the surface of combustible materials, absorbs the heat generated in the combustion process, and then takes away the heat through the evaporation of water.
The fire extinguishing mechanism of the foam fire extinguishing agent is simply that after being sprayed on the surface of the burning material, it can quickly absorb heat to achieve the effect of cooling down, and form a water film on the surface of the burning material to isolate the combustible material from the air. It has good fluidity, thermal stability, fast fire control speed, strong resilience resistance, non-toxic, non-polluting, and 100% biodegradable. The vaporization of the water precipitated in the foam can absorb heat to reduce the temperature of the combustion area, and the water vapor can also dilute the oxygen in the combustion area, which has a cooling and suffocating effect.