The experimental research of using water mist to extinguish smolding fire in enclosed space

Abstract

The fire which occurs in enclosed space such as warehouse, underground cellar, aviation cockpit, ship control room plays an important role of daily common fire. In the event of fire, The poor emission of toxic gases such as carbon monoxide, carbon dioxide generated through combustion process are harmful to personnel on account of the confined space. Smoldering fire plays an important weight in the fire in the enclosed space. It is difficult to detect the smoldering. If it is not extinguished in time, it will spread and convert into naked flame, which causes serious losses of the surrounding environment. This paper focused on the experimental study on the application of water mist in extinguishing the common smoldering fire in enclosed space. Comparison and analysis of the air composition before and after the effect of water mist in enclosed space were made. Industrial dehumidifier was utilized to conduct post-processing. The results show that water mist can extinguish the smoldering fire effectively with high efficiency, with short time and little water consumption. The efficiency of fire extinguishing is directly related with the working time. The longer the water mist works on, the smaller possibility of after-combustion for smoldering. According to results of the after treatment for the toxic gases in enclosed space, dehumidifier can control the humidity effectively, as well as reduce the toxic gases through dehumidification.