EXPERIMETAL INVESTIGATION OF USING GRANULATED FOAMGLASS FOR COOLING THE COMBUSTIBLE LIQUID

Abstract

Extinguishing of flammable liquids is one of the most difficult problems of firefighting. Especially great difficulties are caused by fire extinguishing of oil and oil products, in tank farms. The best results when extinguishing flammable liquids are provided by means air-mechanical foams. For various types of foams, there are common drawbacks: low foams stability under the action of intense heat fluxes from the flame of a burning liquid, their rapid destruction upon contact with polar liquids, difficulties with feeding over long distances, high cost of a number of foaming agents, the presence in their composition of environmentally hazardous substances, contamination of flammable liquids, high cost of foam supply systems . To eliminate the disadvantages of air-mechanical foam, it is proposed to use granular foam glass as one of the components of the fire extinguishing system for extinguishing flammable liquids. It has been previously established that the foam glass layer slows down the evaporation of combustible liquids. In addition, filling the foam glass leads to the cooling of the burning liquids. Cooling is one of the most important mechanisms for stopping combustion. Due to the cooling of flammable liquids, the vapor pressure is lowered over their surface and, accordingly, the intensity of combustion decreases. To determine the conditions for combustion of flammable liquids need to know the temperature of liquids after exposure to them extinguishant substances.