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针对城市天然气储气罐的不断兴建与发展趋势的大型化,对于已建和待建储罐区对周围环境的潜在安全性问题,指出运用破坏伤害范围评价法可直观地预测破坏效应。通过对储罐爆炸释放能量的估算,采用模拟比法结合TNT爆炸试验数据计算出距离储气罐不同距离处爆破冲击波超压值,运用超压准则模拟预测出不同规格、储压下储罐爆破破坏伤害严重程度及危及半径范围;采用世界银行推荐的危害关系式,结合伤害破坏等级分析天然气爆炸破坏效应并与爆破效应比较。5000m3储气罐、储压1.20MPa下,储罐爆破和天然气爆炸危及距离分别可达144.0m和247.7m。依据预测结果,可将罐区周围划分不同区域,为实际工程中罐区选址、建设、安全距离确定及安全预案制定提供参考。
In view of the continuous construction and development trend of urban natural gas storage tanks, the potential safety of built-up and pending storage tanks to the surrounding environment is pointed out, and the destructive effect can be directly predicted by applying the damage damage assessment method. Based on the estimation of the energy released by the explosion of the storage tank, the overpressure value of the blasting shock wave at different distances from the gas storage tank was calculated by the analog ratio method and the TNT explosion test data. The overpressure criterion was used to simulate the blasting of the storage tank with different specifications and storage pressure Damage the severity of the damage and endanger the radius of the scope; Adopt the hazard relationship recommended by the World Bank, combined with injury damage level Analysis of natural gas explosion damage effect and blasting effect comparison. 5000m3 gas storage tank, storage pressure 1.20MPa, storage tank explosion and natural gas explosion endanger distance up to 144.0m and 247.7m respectively. According to the prediction results, the area around the tank farm can be divided into different areas to provide references for site selection, construction, safety distance determination and safety plan development in the actual project.