Study on influence of modified chlorine-containing compounds on N<sub>2</sub>/water mist to suppress LPG explosion

PEI Bei; HU Ziwei; HAN Yuliang; XU Mengjiao; CHEN Liwei; SHAO Xiangyu

doi:10.11883/bzycj-2023-0340

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PEI Bei, HU Ziwei, HAN Yuliang, XU Mengjiao, CHEN Liwei, SHAO Xiangyu. Study on influence of modified chlorine-containing compounds on N2/water mist to suppress LPG explosion[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2023-0340

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PEI Bei, HU Ziwei, HAN Yuliang, XU Mengjiao, CHEN Liwei, SHAO Xiangyu. Study on influence of modified chlorine-containing compounds on N₂/water mist to suppress LPG explosion[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2023-0340

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

doi: 10.11883/bzycj-2023-0340

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

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

Received Date: 2023-09-25
Rev Recd Date: 2024-01-19

Available Online: 2024-09-05

Abstract

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 of LPG,
- N₂/water mist explosion suppression,
- chlorine-containing compounds,
- surfactant

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References(35)

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