含改性氯化合物对N<sub>2</sub>/细水雾抑制LPG爆炸影响研究

裴蓓; 胡紫维; 韩谕良; 徐梦娇; 陈立伟; 邵翔宇

doi:10.11883/bzycj-2023-0340

含改性氯化合物对N₂/细水雾抑制LPG爆炸影响研究

doi: 10.11883/bzycj-2023-0340

裴蓓^{1, 2,},
胡紫维²,
韩谕良²,
徐梦娇²,
陈立伟^{1, 2},
邵翔宇^{1, 2}

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

基金项目: 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）。

详细信息

作者简介:
裴蓓（1982－　），女，博士，副教授，smart128@126.com

中图分类号: O389; TD712
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- 文章访问数: 62
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- 被引次数: 0
出版历程
- 收稿日期: 2023-09-25
- 修回日期: 2024-01-19
- 网络出版日期: 2024-09-05
- 刊出日期: 2024-11-15

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

PEI Bei^{1, 2
,},
HU Ziwei²,
HAN Yuliang²,
XU Mengjiao²,
CHEN Liwei^{1, 2},
SHAO Xiangyu^{1, 2}

1.
Collaborative Innovation Center for Coal Safety Production and Clean and Efficient Utilization, Henan Polytechnic University, Jiaozuo 454003, ,Henan, China
2.
School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, Henan, China

摘要

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。
- LPG爆炸抑制 /
- N₂/细水雾 /
- 含氯化合物 /
- 表面活性剂
Abstract: 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.
- explosion suppression of LPG /
- N₂/water mist /
- chlorine-containing compounds /
- surfactant

HTML全文

图 1 含添加剂N₂/双流体细水雾抑制管道LPG爆炸实验系统

Figure 1. LPG explosion inhibition pipeline experimental system with N₂/twin fluid water mist containing additives

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图 2 6% LPG/空气混合气体爆炸火焰传播与超压的耦合作用

Figure 2. Coupling effect of flame propagation and overpressure of 6% LPG/air mixture explosion

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图 3 含氯化合物与不同表面活性剂复合溶液N₂/细水雾对爆炸超压峰值及其来临时间的影响

Figure 3. Effect of N₂/water mist containing chloride compounds and different surfactants composite solution on the maximum overpressure and its arrival time

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图 4 不同表面活性剂对复合溶液表面张力的影响

Figure 4. Effect of different surfactants on surface tension of composite solution

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图 5 含氯化合物与不同表面活性剂复合溶液N₂/细水雾对火焰速度峰值及其来临时间的影响

Figure 5. Effect of N₂/water mist containing chloride compounds and different surfactants composite solution on maximum flame velocity and its arrival time

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图 6 含5%NH₄Cl与不同表面活性剂复合溶液N₂/细水雾对6%LPG/空气预混气爆炸火焰结构演化过程的影响

Figure 6. Effect of N₂/water mist containing 5% NH₄Cl and different surfactants composite solution on the flame structure of 6% LPG/air mixture explosion

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图 7 含改性KCl复合溶液N₂/细水雾抑制LPG/空气预混气爆炸机理

Figure 7. Suppression mechanism diagram of N₂/water mist containing modified KCl additive on LPG/air mixture explosion

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图 8 不同抑制工况下LPG/空气爆炸的绝热火焰温度

Figure 8. Adiabatic flame temperature of LPG/air explosion under different inhibition conditions

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图 9 不同工况下O+H+OH的摩尔分数变化

Figure 9. Change of mole fraction of O, H and OH under different working conditions

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