Blast accidents caused by gas leakage and identification of hazardous areas in united stations

doi:10.16265/j.cnki.issn 1003-3033.2021.12.012

Abstract

Abstract: In order to explore catastrophic consequences of combustion and explosion accidents caused by leakage during operation of oil and gas equipment in united stations, a consequence prediction and evaluation model of the equipment was established by computational fluid dynamics technology. Firstly, numerical simulation was carried out for different gas leakage and dispersion scenarios, and effects of various factors on dispersion behavior of gas clouds were analyzed. Then, a combustion and explosion accident model was established based on distribution of combustible gas clouds. Finally, accidental load principle was introduced to identify hazardous areas. The results show that when open space is well ventilated, combustion and explosion accident are the major one in gas leakage chain accidents. Distribution of combustible gas clouds is significantly affected by factors such as leakage rate, wind speed, and obstacles. For pool fire, as it is influenced by wind, migration phenomenon will be observed during burning process. In places with high equipment congestion, area of heat radiation damage caused by fire accidents is usually larger than that of high temperature danger areas, and heat radiation is the main damage load.

Key words: united stations, oil and gas processing equipment, leakage and dispersion, combustion and explosion accidents, hazardous area identification, jet fire

CLC Number:

X932

XIE Weikang, CHEN Guoming, SHI Jihao, YANG Dongdong. Blast accidents caused by gas leakage and identification of hazardous areas in united stations[J]. China Safety Science Journal, 2021, 31(12): 85-94.

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