Researches indicate that the increase of the work pressure of fine water mist system can decrease particle size of water droplet of fine water mist and enhance the efficiency of fire-extinguishing.

Based on the analysis of test result on filtration of airborne particle, the feasibility on removal of oil mist by using wash-type metal filler air filter is analyzed.

The particle size, the velocity distribution and the water mist volume flux of the water mist flow field are obtained through experiments.