高压天然气管道泄漏燃烧爆炸后果

Consequence of Combustion and Explosion After High-pressure Natural Gas Pipeline Leakage

针对高压天然气管道的泄漏问题,分析了喷射火、火球和蒸气云爆炸3种危害模式及其死亡半径。按照大孔泄漏导致50%人员致死率的损伤标准,对三者的死亡半径进行了分析。结果表明:相同情况下,火球和喷射火的死亡半径比蒸气云爆炸的死亡半径大得多;火球和喷射火的死亡半径较为相近。高压天然气管道泄漏发生喷射火的概率较大,建议在进行天然气管道风险评价时重点考虑喷射火的危害。

In the light of leakage of high-pressure natural gas pipeline,the disaster-causing mode and death radius of jet fire,fire ball and vapor gas explosion after leakage of natural gas pipeline are studied.According to the standard of 50% lethality in large-hole leakage accident,the death radius of the jet fire,fire ball and vapor gas explosion modes are compared.The result shows that the death radius of jet fire is similar to that of fire ball,but much larger than that of vapor gas explosion.As the probability of jet fire mode in gas leakage accident is higher than that of fire ball,it is suggested that the hazard of jet fire mode should be mainly considered in risk assessment of natural gas pipeline.