Theoretical and experimental study on the flameless venting characteristics during 4-nitrotoluene dust explosion

被引：0

作者：

Lu, Zhengkang ^{[1
]}

Gao, Wei ^{[1
]}

Jiang, Haipeng ^{[1
]}

机构：

[1] Dalian Univ Technol, Dept Chem Machinery & Safety Engn, State Key Lab Fine Chem, Dalian 116024, Peoples R China

来源：

POWDER TECHNOLOGY | 2025年 / 453卷

基金：

中国国家自然科学基金;

关键词：

4-NT dust explosion; Vented flame; Flameless venting; Quenching thickness; Reduced overpressure; CFD SIMULATIONS; BEHAVIORS; PROPAGATION; COMBUSTION; IGNITION; KINETICS; METHANE; MODEL;

D O I：

10.1016/j.powtec.2025.120606

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Flameless venting operation is a primary measure to mitigate flame and overpressure in industrial production. The propagation behavior of the vented flame and its relationship with reduced explosion overpressure during a 4-NT dust explosion were analyzed. The impact of vented pressure and secondary explosion on flame development was clarified. The extinction parameters were calculated by using wall heat transfer theory, and the critical extinction thickness was determined. The evolution law of reduced explosion overpressure during the flameless venting process was analyzed, and the mechanism of the wall constraint and blocking effect on pressure fluctuation was revealed. Furthermore, the venting efficiency was investigated, and the underlying causes for the changes in venting efficiency were elucidated through a quantitative analysis of flow resistance. These findings provide a theoretical basis for optimizing 4-NT dust explosion protection measures and serve as a significant reference for enhancing safety in industrial production.

引用

页数：12

共 54 条

[1] Application of flame arrester in mitigation of explosion and flame deflagration of ventilation air methane [J].