化工学报2019，Vol.70Issue(3)：1236-1242,7.DOI:10.11949/j.issn.0438-1157.20180654
基于cup burner的含铁基添加剂超细水雾灭火有效性分析
Analysis of fire suppression effectiveness of ultra-fine water mist containing iron compounds additives in cup burner
摘要
Abstract
To evaluate the fire suppression effectiveness of ultra-fine water mist containing iron compounds additives qualitatively and quantitively, a small-scale experiment platform was set up to explore the minimum extinguishing concentration of the water mist under different fuels. Ethanol and n-heptane were separately used as fuels. Air flow was kept as 60 L/min during experiments. The water mist content in the air was gradually increased by adjusting the power of atomizer. The critical fire suppression concentration was obtained until fire was extinguished. Furthermore, to understand the fire suppression mechanisms deeply, structures formed by iron oxides and H radicals were relaxed based on the density functional theory. The results show that ferrocene and ferrous sulfate can obviously reduce the minimum extinguishing concentration of ultra-fine water mist. The decreasing degree of minimum extinguishing concentration is not linear with the content of additives. There are optimal concentrations of iron compounds additives match to fire suppression effectiveness of the water mist. The optimal concentrations of ferrocene and ferrous sulfate are 0.01％ and 1％ respectively. The fire suppression effectiveness is affected by the type of fuels. Its order is as following in this experiment: ethanol＞ n-heptane. Fe (OH) 2 formed by the reaction of iron oxide with H radical is an active catalytic substance capable of eliminating H radicals by chain reaction.关键词
超细水雾/添加剂/临界灭火浓度/自由基/催化作用/反应机理/密度泛函理论Key words
ultra-fine water mist/additive/minimum extinguishing concentration/radical/catalysis/reaction mechanism/density functional theory分类
化学化工引用本文复制引用
梁天水,王宗莹,高坤,李润婉,王铮,钟委,赵军..基于cup burner的含铁基添加剂超细水雾灭火有效性分析[J].化工学报,2019,70(3):1236-1242,7.基金项目
国家自然科学基金项目(51874258 （）
51404215) （）
博士后基金会特别资助项目(2015T80781) （2015T80781）
郑州大学优秀青年发展基金项目(1521324003) （1521324003）
