Study on sealing performance of foam to solvent oil vapor under different foaming methods
Based on the flux chamber test model developed by the United States Environmental Protection Agency,this study inves-tigates the impact of several factors,such as expansion,foam thickness,and drainage time,on the sealing performance of syn-thetic foam extinguishing agents.The investigation is conducted under the production mode of compressed air foam.Additionally,the study compares and analyzes the sealing performance of com-pressed air foam and aspirated foam,aiming to elucidate the mechanisms that influence foam sealing performance.The results indicate that the foam stability of the synthetic foam extinguishing agent does not necessarily increase with expansion.It is found that the inhibition of the liquid film on oil vapor in the foam plays a crucial role in foam sealing performance.Specifically,lower foaming ratios result in higher liquid content in the foam,ulti-mately enhancing the sealing performance against oil vapor.Based on these findings,it is recommended to employ foam with a ex-pansion of less than 10 for tackling 120#solvent oil leakage acci-dents.Furthermore,the study shows that,under the same expan-sion,compressed air foam exhibits superior stability,higher liq-uid content,and better sealing performance compared to aspirated foam.
expansionfoam thicknessflux chamberexplosion limitcompressed air foam
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