Influence of inlet duct turning on dust-collector explosion

被引：6

作者：

Pang L. ^{[1
,2
]}

Jin X. ^{[1
]}

Ou S. ^{[2
]}

Sun S. ^{[1
]}

机构：

[1] School of Safety Engineering, Beijing Institute of Petrochemical Technology, Beijing

[2] Research Institute of Macro-Safety Science, University of Science and Technology Beijing, Beijing

来源：

Journal of Loss Prevention in the Process Industries | 2022年 / 79卷

关键词：

Corn starch; Dust collector; Dust explosion; Secondary explosion; Turning of inlet duct;

D O I：

10.1016/j.jlp.2022.104839

中图分类号：

学科分类号：

摘要：

A 12-L dust-explosion model was designed to conduct a corn-starch explosion experiment to investigate the influence of the turning structure of the inlet duct on the dust-explosion propagation process. The development in the dust explosion in the dust collector and the propagation process of the explosive flame in the inlet duct were examined. Additionally, the influence of the turning distance of the inlet duct on the dust-collector explosion was analyzed. By changing the distance from the turning position of the inlet duct to the dust collector, the distance had a negative correlation with the maximum explosion pressure of dust in the vessel and a positive correlation with the explosion duration. The pressure curve in the duct exhibited a bimodal structure, and the secondary explosion phenomenon was relatively pronounced in the middle of the turning inlet duct. Owing to the obstruction of the turning inlet duct, the decay rate of the explosion pressure decreased before turning and increased after turning. In addition, with an increase in the turning distance, the decay rate of the explosion pressure in the duct decreased, whereas the secondary explosion in the duct became more intense. © 2022 Elsevier Ltd

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