cooling fire
Once the combustible material reaches the ignition point, it will burn or continue to burn. Under certain conditions, the combustion will stop when the temperature of the combustible material is lowered below the ignition point. For flammable solids, cool them below the ignition point; for flammable liquids, cool them below the flash point, and the combustion reaction may stop. Putting out fires caused by general solid substances with water is mainly achieved through cooling. Water has a large specific heat capacity and high heat of vaporization, and its cooling performance is very good. In the process of extinguishing a fire with water, the water absorbs a large amount of heat, so that the temperature of the burning object is rapidly reduced, the flame is extinguished, the fire is controlled, and the fire is terminated. The water mist of the water spray fire extinguishing system has a small diameter of the water droplets, a large specific surface area, and a large contact range with the air. It can easily absorb the heat of the hot air flow, and can also quickly reduce the temperature, and the effect is more obvious.
fire isolation
Among the three elements of combustion, combustibles are the main factor of combustion. Isolating combustibles from oxygen and flames can stop combustion and extinguish fires. For example, the automatic water spray-foam combination system sprays foam while spraying water, and the foam covers the surface of the burning liquid or solid, and while playing a cooling role, it separates the combustibles from the air, so that it can extinguish the fire. For another example, when extinguishing a flammable liquid or gas fire, quickly close the Butterfly valve firefighting manufacturer valve of the pipeline that transports the flammable liquid or gas, cut off the pipeline that flows to the fire area, and at the same time open the flammable liquid or gas to the safe area The valve can transfer the flammable liquid and flammable gas in the container that has burned or is about to burn or is threatened by fire.
