含改性氯化合物对N2/细水雾抑制LPG爆炸影响研究  

Study on influence of modified chlorine-containing compounds on N2/water mist to suppress LPG explosion

作　　者：裴蓓[1,2] 胡紫维 韩谕良 徐梦娇 陈立伟[1,2] 邵翔宇 PEI Bei;HU Ziwei;HAN Yuliang;XU Mengjiao;CHEN Liwei;SHAO Xiangyu(Collaborative Innovation Center for Coal Safety Production and Clean and Efficient Utilization,Henan Polytechnic University,Jiaozuo 454003,,Henan,China;School of Safety Science and Engineering,Henan Polytechnic University,Jiaozuo 454003,Henan,China)

机构地区：[1]河南理工大学煤炭安全生产与清洁高效利用省部共建协同创新中心,河南焦作454003 [2]河南理工大学安全科学与工程学院,河南焦作454003

出　　处：《爆炸与冲击》2024年第11期169-180,共12页Explosion and Shock Waves

基　　金：河南省高校科技创新人才支持计划项目(22HASTIT027);河南省科技攻关计划项目(222102320142);河南省高校基本科研业务费专项(NSFRF210344)。

摘　　要：为了提高对液化石油气(liquefied petroleum gas,LPG)的抑爆效能,采用自主设计的半开式有机玻璃管道搭建了N2/细水雾抑爆实验平台,从爆炸超压、火焰传播速度及其峰值来临时间、火焰结构等4个方面分析含改性氯化合物N2/细水雾抑爆效果。结果表明:含氯化合物对表面活性剂具有选择性,KCl、NaCl和NH4Cl与脂肪醇聚氧乙烯醚(AeO9)、有机硅表面活性剂(Sicare2235)等2种表面活性剂之间的协同增效效果更优,爆炸超压峰值、火焰传播速度峰值均明显降低,且峰值来临时间明显延长;十二烷基硫酸钠(sodium dodecyl sulfate,SDS)仅与NaCl共同作用时抑爆效果有明显提升,与其他3种氯盐共同作用时没有增效效果甚至产生促爆现象;FeCl2与表面活性剂协同时会出现爆炸增强现象;含氯化合物与表面活性剂共同作用时,复合溶液的表面张力存在最佳值,即表面张力在20 mN/m时,抑爆效能最佳。化学动力学数值模拟结果表明:含改性氯化合物N2/细水雾能够有效降低绝热火焰温度,消耗关键自由基,中断燃烧链式反应,其抑爆的协同增效机理主要体现在N2惰化稀释、表面活性剂调控水雾粒径增加冷却效应和抑制链式反应3个方面。In order to improve the explosion suppression efficiency of liquefied petroleum gas(LPG),a self-designed semi-open organic glass pipeline was used to build the N2/water mist explosion suppression experimental platform.The explosion suppression effect of N2/water mist containing modified chlorine compounds was analyzed from four aspects:explosion overpressure,flame propagation velocity and its peak arrival time,and flame structure.The results show that the chlorine compounds are selective to surfactants.The synergistic effect between KCl,NaCl and NH4Cl and fatty alcohol polyoxyethylene ether(AeO9)and silicone surfactant(Sicare2235)is better.The maximum explosion overpressure and flame propagation velocity are obviously reduced,and their arrival time is obviously prolonged.When sodium dodecyl sulfate(SDS)only interacts with NaCl,the explosion suppression effect is significantly improved.While when SDS interacts with the other three chloride salts,there is no synergistic effect or even explosion-promoting effect.Explosion enhancement occurs when FeCl2 cooperates with surfactants.When the chlorine compound and the surfactant act together,there is an optimal value for the surface tension value,when the surface tension is 20 mN/m,the explosion suppression efficiency is the best.The numerical simulation results of chemical kinetics show that the modified chlorine compound N2 water mist can effectively reduce the adiabatic flame temperature,consume key free radicals,and interrupt the combustion chain reaction.The synergistic mechanism of explosion suppression is mainly reflected in three aspects:N2 inerting dilution,surfactant regulation of water mist particle size increase cooling effect and inhibition of chain reaction.The research results will provide technical guidance for the prevention and suppression of liquefied petroleum gas explosion accidents in China.

关 键 词：LPG爆炸抑制 N2/细水雾 含氯化合物 表面活性剂 

分 类 号：O389[理学—流体力学] TD712[理学—力学]