Experimental study on the effectiveness of dry water material to suppress oil pool fire and analysis of fire extinguishing mechanism.

To study the effectiveness of dry water material in suppressing oil pool fires, the experimental platform of liquid fuel fire extinguishing was built, and the effectiveness test was carried out. The effect of releasing pressure on dry water suppressing oil pool fires of different sizes was analyzed, and the effectiveness of dry water extinguishing on polar and non-polar liquid fuel was studied. The inhibition efficiency and mechanism of dry water modified by two kinds of metal sodium salt on oil pool fires were revealed. The results show that the release pressure of 0.6 MPa is the most effective for extinguishing the oil pool fire. For methanol, ethanol, and n-heptane liquid fuels, dry water has the highest extinguishing efficiency. Among modified dry water, sodium carbonate dry water is better in fire extinguishing efficiency, while sodium acetate dry water is poor; by comparing the theoretical critical parameters and experimental values, it can be seen that the physical fire extinguishing mechanism of dry water on oil pool fire mainly includes cooling, oxygen isolation and air dilution, among which the cooling effect of fire plume and fuel surface is the dominant physical fire extinguishing mechanism. [ABSTRACT FROM AUTHOR]

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