在新制备了一种多组分泡沫灭火剂的基础上,发展了多组分压缩空气泡沫灭火系统(multi-component compressed air foam system,MCAFS),并开展了在不同泡沫浓度、不同结构类型混合腔和不同工作压力等工况条件下,其对油池火和木垛火的灭火有效性实验研究.实验结果表明,泡沫浓度对灭火效果有显著影响,且对不同可燃物存在一个不同的最佳灭火浓度,例如,对于煤油池火,该最佳泡沫溶液浓度约为2.2%,而对于木垛火则为4.0%.此外,采用同轴型混合腔比采用T型混合腔,系统具有更好的灭火效果.系统工作压力对灭火效果的影响也很明显,即系统工作压力越高,灭火越迅速.
A multi-component compressed air foam system (MCAFS) was developed with newly prepared multi-component foaming agents. Extinguishing of wood crib and oil pool fires was performed under different conditions, such as foam concentration, mixing chamber forepart structure and working pressure. It was found that the foam concentration had sufficient effects on fire extinguishing efficiency, and an optimized concentration value exists. For instance, for diesel oil pool fires, this value is about 2.2% while it is about 4.0% for wood crib fires. The results also show that the system with a coaxial mixing chamber has greater efficiency than a T-shape. The effects of working pressure on fire extin- guishing are evident in experiments, i.e., the higher the working pressure is, the more readily the fire is extinguished.
