Scientific Journal Problems of Emergency Situations - V. Makarenko, О. Kireev, М. Chyrkina-Kharlamova, Y. Slepuzhnikov, O. Kovalov. Fire-extinguishing characteristics of light bulk materials for class "B" fires. Р. 40-54.

On the basis of earlier studies, crushed foam glass with a granule size of 1–1.5 cm was chosen as a light loose material that ensures the buoyancy of the entire system. As a loose material that increases the insulating properties of the fire extinguishing system, expanded perlite with a granule size of 1 was used 1–1.4 mm. A pneumatic ejection device was developed and manufactured for feeding granular expanded perlite. A study was also conducted on extinguishing a standard model fire "8B" with additional application of sprayed water to the surface of the binary layer of foam glass + perlite. It has been established that supplying water allows to reduce the consumption of swollen perlite by two times. It is shown that wetting a layer of perlite with water significantly increases the insulating properties of such a layer and provides a high cooling capacity of the entire fire extinguishing system based on light loose materials. On the basis of economic calculations, it is shown that the use of water for wetting the upper layer makes it possible to reduce the financial costs required for fire-extinguishing substances. It was established that the financial costs of fire-extinguishing substances of the system crushed foam glass + expanded perlite + sprayed water with specific surface consumption of the components 10.5 kg/m², 1.98 kg/m² and 2 kg/m² amount to 184 UAH/m². According to this parameter, this fire extinguishing system has a significant advantage compared to foam glass + gel systems and air-mechanical foams. A comparison was made with the results of extinguishing gasoline on model fires of small sizes. On the basis of the environmental assessment of the proposed fire extinguishing system, its advantages in terms of this parameter are shown in comparison with existing means of extinguishing flammable liquids. The issue of introducing the proposed fire extinguishing system into the practice of fire extinguishing of large tanks with flammable liquids was considered.

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