Abstract: Taking high stability compressed air foam fire extinguishing agent as research object, the 1.73 m² standard fire test was used to compare the effects of different foam generation systems, different expansion and different fuel types on watersoluble liquid fire extinguishing with high stability alcohol- resistant compressed air foam. The experimental results showed that the foam stability, extinction time and burnback time of alcohol- resistant foam in compressed air foam system are significantly better than that of traditional foam system. The burnback performance of the foam decreases with the increase of expansion in compressed air foam system, and the acetone fire is more difficult to extinguish than ethanol fire. It is necessary to evaluate the fire extinguishing performance according to the target water-soluble liquid when selecting alcohol-resistant foam.

Key words: water-soluble liquids fire, compressed air foam system, fire extinguishing performance