Choice of bulk materials for extinguishing polar flammable liquids

Ilham Babashov

Academy of the Ministry of Emergencies of the Republic of Azerbaijan

http://orcid.org/0000-0002-3294-1767

Ilgar Dadashov

Academy of the Ministry of Emergencies of the Republic of Azerbaijan

http://orcid.org/0000-0002-1533-1094

Oleksandr Kireev

National University of Civil Defence of Ukraine

http://orcid.org/0000-0002-8819-3999

Alexander Savchenko

National University of Civil Defence of Ukraine

http://orcid.org/0000-0002-1305-7415

DOI: https://doi.org/10.52363/2524-0226-2022-35-23

Keywords: extinguishing liquids, polar flammable liquids, ethanol, bulk materials, foam glass, adsorbents, combustion inhibitors

Аnnotation

The study of the previously proposed method of extinguishing polar liquids with fire extinguishing agents based on light bulk porous materials is continued. The analysis of characteristics (adsorption properties in relation to ethanol vapor, the effect of combustion inhibition) and the choice of bulk materials for extinguishing flammable polar liquids. The bulk density, moisture content and buoyancy in ethanol of a number of selected bulk materials with different dominant mechanisms of cessation of combustion and different sizes and shapes of granules were experimentally determined. It has been established that the greatest buoyancy of a two-layer fire extinguishing system can be ensured with the help of foam glass with granule sizes (10–15), (15–25) and (25–35) mm. The influence of the characteristics of bulk materials on their fire-extinguishing properties: bulk density, buoyancy, water retention, ability to fill the voids of the lower layer and wake up through this layer is analyzed. Based on the determination of the ability to fall through the layer of granular foam glass, it was found that the lowest pouring provides the lower layer of foam glass with a granule size (10–15) mm. It was determined that the best adsorption properties in relation to ethanol vapor exhibits silica gel – 5,3 wt. %. It is concluded that for further study of the fire extinguishing properties of a two-layer fire extinguishing system designed to extinguish flammable polar liquids as a material that provides buoyancy, it is advisable to choose foam glass with a granule size (10–15) mm. For the top layer, it is advisable to test all substances that can inhibit the combustion process, as well as zeolites, granular silica gel, foam glass with a granule size (5–10) mm, expanded perlite with granules with a diameter of (1–1,5) mm, and two varieties exfoliated vermiculite.

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