Study On The Interaction Between Water Mist Contained Compound Additives And Kerosene Pool Fire

At present, there are three common techniques of stationary fire extinguisher system at burning liquid fire spot, that is: gas suppressing fire system, foam suppressing fire system and water spray suppressing fire system. They are provided with bad durative, endanger to environment, personnel and facility and boiling over. But water mist has a wider foreground to extinguish B-type fire because of its better fire suppressing effect. For improving the suppressing efficiency of water mist, the compound additives agent is added into water mist and the studying of the interaction of water mist and kerosene pool fire with compound additives agents was carried. First, the critical size of droplet which is fit for extinguishing kerosene pool fire is 80 to 250μm was get by theoretical calculate. Then the critical water mist flux can be inferred. Second, the compound additives agent which was fitted for the pool fire was get by the orthogonal experiment of critical water mist drop size and mist flux at the same experimental condition. The experiment shows that the compound additives agent can improve the efficiency of water mist suppressing fire. Finally, the experiment of water mist with compound additives contained and without compound additives agent was carried out. The mechanism of water mist with compound additives agent is: the compound additives agents catch the free radical to suppress fire in the fire scene, and the flame is cooled. Finally, the big fire becomes small. At the same time, because of the small fire, the entrainment air is low and the oxygen concentration decreases relevantly and the fire was extinguished by suffocation。...