Simulation of Influence Range of Natural Gas Fire and Explosion Accident in Cold Vent

doi:10.11885/j.issn.1674-5086.2020.06.05.04

Abstract

Abstract: Many researches on accidental fire and explosion accidents in the cold venting operation, only consider the damage range from the shock wave overpressure, but once a fire occurs, the heat radiation intensity is also very strong, so it is necessary to study the heat radiation damage range of the fire under different influencing factors. The influence range of thermal radiation and shock wave overpressure of cold vented natural gas fire under 6 MPa and 20×10⁴m³/h venting rate are analyzed, and then the influence range of thermal radiation and shock wave overpressure under different venting rates and different venting pressure are simulated. The results show that under the simulation condition, the vent pressure has a greater impact on the thermal radiation intensity, and the farthest distance of slight injury caused by thermal radiation is 269.72 m; under the simulated condition, the vent rate has a greater impact on the overpressure of shock wave, and the farthest distance of slight injury caused by shock wave is 198.00 m. In practical engineering, it is very important to control the venting pressure and venting rate to reduce the consequences of accidental combustion and explosion accidents.

Key words: cold vent, gas pipeline, thermal radiation, vent rate, vent pressure, fire, explosion

CLC Number:

X937

JIANG Hongye, LI Wenqian, ZHANG Yongcheng, XU Taolong, GU Peng. Simulation of Influence Range of Natural Gas Fire and Explosion Accident in Cold Vent[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2022, 44(5): 151-158.

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