改进型细水雾喷头雾化特性及灭火试验研究  

Experimental study on spraying characteristics and extinguishing performance of improved water mist nozzle

作　　者：陈健[1] 许开立[1] CHEN Jian XU Kaili(School of Resources and Civil Engineering, Northeastern University, Shenyang Liaoning 110000, China)

机构地区：[1]东北大学资源与土木学院,辽宁沈阳110000

出　　处：《中国安全科学学报》2017年第7期59-64,共6页China Safety Science Journal

基　　金：辽宁省教育厅科学研究项目(L201625)

摘　　要：为改进细水雾喷头的雾化效果,根据雾化芯结构特征设计14种细水雾喷头,采用激光粒径仪、细水雾试验装置,研究雾化芯设计参数对其雾化效果的影响,探究改进型喷头最优灭火效果所对应的工作压力和添加剂质量浓度。结果表明:四流道雾化芯细水雾喷头雾化效果最好,雾滴粒径(X_(90))为110.578μm;当工作压力从8 MPa增加到12 MPa时,细水雾灭火效果提高17.4%,超过12 MPa时提升作用甚微;水中的添加剂可以提高细水雾灭火效果,十二烷基苯磺酸钠(SDBS)质量浓度为0.4 g/L时灭火效果最佳。In order to improve atomization effect of the nozzle,14 types of water mist nazzles were designed according to atomizated core structure features. Employing laser particle size analyzer and water mist evalution device,the dependencies of atomization effect on atomization chip design parameters were invesitigated. Furthermore,the working pressure and additive concentration corresponding to the optimal fire extinguishing performance of the advenced nozzle were evaluated. The results show that the best atomization effect can be brought about by the water mist nozzle having four swirl chambers when droplet size（ X90） is 110.578 μm,that the fire extinguishing efficiency can be improved by 17.4%by increasing the working pressure from 8 MPa to 12 MPa,however the efficiency it will not be improved if the pressure is more than 12 MPa,and that adding sodium dodecyl benzene sulfonate（ SDBS） to the water would enhance fire extinguishing performance especially the additive concentration is at 0.4 g/L.

关 键 词：细水雾 喷嘴 灭火 雾化 粒径 

分 类 号：X932[环境科学与工程—安全科学]