Abstract:

Abstract: Fire in the confined space is a problem of fire rescue and fire evacuation. The use of water mist fire extinguishing system can protect the equipment to the maximum extent, and has good environmental protection performance compared with other fire extinguishing agents. In order to give full play to the fire extinguishing effect, the influence of additives in water on fire suppression was studied. The influence of NH₄Cl additive on the atomization effect of the precipitation atomization system was carried out in the confined space. The fire extinguishing effect of flame shape change, temperature change of each measuring point and the concentration of additives were studied, and the change of oxygen content in confined space was studied The monitoring and analysis were carried out. The results show that the addition of NH₄Cl additive in water has an effect on the atomization effect. The fire extinguishing time is obviously affected by the concentration of additives. There is the concentration of additives which make the best extinguishing effect. The coupling mechanism of physical and chemical fire extinguishing can be better played at this concentration.

Key words: fire safety, additive, water mist, oil fire, fire extinguishing effect