In order to explore the effects of different types of surfactants on the fire extinguishing efficiency of two-fluid water mist containing salt additives,In this experiment,sodium dodecyl benzene sulfonate(SDBS),cocamidopropyl betaine(CAB35)and alkyl glucoside(APG0810)were selected to study the effects of surfactants on the fire extinguishing efficiency of salt-containing two-fluid water mist from three aspects:fire extinguishing time,cooling effect and CO concentration peak.The results show that in the air environment,the three surfactants can effectively shorten the fire extinguishing time of water mist containing salt additives,thereby reducing the peak CO concentration in the fire extinguishing process.Among them,4％APG0810 has the best fire extinguishing effect on the modified two-fluid water mist containing 5％K2CO3,and the fire extinguishing time is 29％shorter than that containing 5％K2CO3 two-fluid water mist.Compared with air/water mist,the fire extinguishing time is reduced by 55％,but at the same time,due to the decrease of the particle size of the surfactant,it is easy to be affected by turbulence,resulting in the cooling effect of the water mist containing salt additives.In the CO2 environment,due to the small specific heat capacity of CO2,the surfactants have the experimental phenomenon of slightly shortening the fire extinguishing time and extending the fire extinguishing time after modifying the fine water mist containing a single salt additive.And compared with salt-containing additive water mist,the peak CO concentration in the fire extinguishing process also increased,and the cooling effect also decreased.The research results will provide reference for prevention and control of alcohol-based fuel fires.
关键词
双流体细水雾/二氧化碳/表面活性剂/乙醇火/安全
Key words
double flow fine water mist/carbon dioxide/surfactants/ethanol fire/safety
维普
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