Surfactant-containing Water Mist Suppression Pool Fire Experimental Analysis

In order to study fire extinguishment additives which are no pollution and few damage on object protected, establish a fixed water mist fire extinguish experiment platform, explore the temperature variation characteristics and flam shape by adding surfactant on water mist for the pool fire suppression, though the comparison with the flame temperature and extinguish time of gasoline and diesel pool fire, get their fire performance. The results show that adding surfactant to the water mist can greatly improve the water mist fire performance. The process of additives-containing water mist system inhibit the pool fire can be divided into four stages, which are flame early growth stage, preliminary inhibition stage, flame again growth stage and again inhibition stage. The mechanism of containing a surfactant water mist inhibit the pool fire of gasoline and diesel, which can capture and annihilate the free radical of chain reaction, decrease surface tension, not simply cooling effect. The surfactant molecules reduce the energy of surface and interface, which is good for the descent of water mist droplet size, the emulsification of surface gasoline with water and the formation and stabilization of foam, improve the effect on the cooling and isolation of fame and gasoline with water mist.