含NH_(4)Cl添加剂细水雾对油池火灭火效果的研究

Study on extinguishing effect of water mist containing NH_(4)Cl additive on pool fire

受限空间内的火灾是消防救援与火场疏散的难题。细水雾灭火系统能最大限度保护设备,与其他灭火剂相比具有良好的环保性能。为了更好地发挥灭火效果,采用在水中加入添加剂的方式以探究其对灭火的影响,在受限空间内开展含NH4Cl添加剂的细水雾对雾化效果的影响和灭油池火的实验,研究火焰形状变化、受限空间内温度变化以及添加剂浓度不同时的灭火效果,对受限空间内氧含量的变化进行监测分析。研究表明:在水中加入NH4Cl添加剂后,改变了喷雾的分布,雾场中心雾滴较密集,且随着NH4Cl浓度的增加雾滴粒径增大,雾化锥角变小。采用不同浓度的NH4Cl添加剂细水雾灭火时,受限空间内氧含量及灭火时间呈不同的变化,当添加剂浓度为2%时,物理与化学灭火的耦合机制能更好地发挥,灭火效果最佳。

Fire in the confined space is a problem of fire rescue and fire evacuation.The use of water mist fire extinguishing sys-tem can protect the equipment to the maximum extent,and has good environmental protection performance compared with oth-er 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 ef-fect of flame shape change,temperature change of each measur-ing 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 at-omization effect.The fire extinguishing time is obviously affect-ed by the concentration of additives.There is the concentration of additives which make the best extinguishing effect.The cou-pling mechanism of physical and chemical fire extinguishing can be better played at this concentration.