Analysis of fire suppression effectiveness of ultra-fine water mist containing iron compounds additives in cup burner

被引：0

作者：

Liang T. ^{[1
]}

Wang Z. ^{[1
]}

Gao K. ^{[1
]}

Li R. ^{[1
]}

Wang Z. ^{[1
]}

Zhong W. ^{[1
]}

Zhao J. ^{[1
]}

机构：

[1] School of Mechanics and Engineering Science, Zhengzhou University, Zhengzhou, 450001, Henan

[2] Industrial Technology Research Institute, Zhengzhou University, Zhengzhou, 450001, Henan

来源：

Huagong Xuebao/CIESC Journal | 2019年 / 70卷 / 03期

关键词：

Additive; Catalysis; Density functional theory; Minimum extinguishing concentration; Radical; Reaction mechanism; Ultra-fine water mist;

D O I：

10.11949/j.issn.0438-1157.20180654

中图分类号：

学科分类号：

摘要：

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. © All Right Reserved.

引用

页码：1236 / 1242

页数：6

共 34 条

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