The relationship between the foaming ratio and the oil content of the foam obtained by the fluorine protein foam fire extinguishing agent manufacturer through the cold spray test of a gasoline tank with a diameter of 2.7 meters and an oil layer thickness of 9 meters. Fluoroprotein foam, because the fluorocarbon chain in the fluorocarbon surfactant molecule has both hydrophobicity and strong oleophobicity, it can not only form a water film on the interface between the foam and the oil, but also enclose the oil droplets. In the foam, it prevents the evaporation of oil and reduces the combustibility of the oil-containing foam. According to measurements, the fluoroprotein foam can burn freely when the gasoline content is as high as 17%. In order to control the foam oil content within the non-combustible concentration and consider its comprehensive fire extinguishing effect, the foam expansion ratio should be controlled at about 3 times. Therefore, when the fluorine protein foam is injected under the liquid to fight the gasoline tank fire, the high back pressure foam generator is used, and the working pressure must reach 7×105Pa.
The fluoroprotein foam fire extinguishing agent has obvious characteristics: surface tension and interfacial tension are significantly reduced; the foam has good flow properties and fast extinguishing speed; the fluoroprotein foam has strong resistance to oil pollution and can extinguish large oil tanks by submerged jetting Fire; can be combined with dry powder.
Ensure the working pressure of various guns, cannons and hook tubes, so that the mixed liquid and air can be fully mixed. The air-mechanical foam used by the firefighting forces is mainly formed by the thorough mixing of the mixed liquid and air under the action of the machine. To make the mixed liquid and air fully mix, it must have sufficient mechanical action, and all kinds of guns, cannons, and hook tubes must have sufficient inlet working pressure. The working pressure of the pump should be adjusted according to the requirements of the working pressure of various foam guns, guns and hook pipe inlets so that the mixed liquid and air can be fully mixed.
Manufacturers of fluoroprotein foam fire extinguishing agents stated that they should try to avoid high temperature damage. Because high temperature will have a destructive effect on the foam, when spraying the foam, try to prevent the foam from flowing through the high temperature tank wall as much as possible, and pay attention to avoid the flame. Fluoroprotein foam extinguishing agent is widely used in fire fighting of large oil storage tanks.