柴油—LNG动力船舶燃料加注燃爆风险分析预测

将液化天然气(LNG)用作船用燃料,可降低运输成本,且节能环保。但在生产及储运过程中存在火灾爆炸的风险。本文着重对LNG双燃料动力船舶加注过程的风险进行了分析。运用事故树分析方法,对加注过程中的风险进行识别并进行定性分析；根据泄漏概率和相关统计公式求得了燃料加注过程中管系发生泄漏的概率；对加注过程发生泄漏事故的后果进行了预测,包括利用高斯模型对加注过程管系泄漏事故时可燃气体浓度在5%-15%的半径范围进行预测,运用池火模型计算加注过程LNG 泄漏形成池火的热辐射危险距离；采用TNT当量法和超压准则对加注过程气罐泄漏发生蒸气云爆炸的危害范围进行预测。

The Explosion Risk Prediction of Chinese Inland Diesel-LNG Fuel Ship in Fuel Filling Process

Using liquefied natural gas (LNG) for ship fuel can reduce transportation cost and protect marine environment. But there are fire and explosion risks in the process of production, storage and transportation. The risks occurring in fuel filling are focused in this paper. Accident tree method is applied to identify and analyze qualitatively. The probability of pipe leakage was obtained according to relative statistical data and formulas. The consequences of leakage accidents in fuel filling process were predicted, and the scope of containing 5%-15% combustible gas was predicted with Gauss model, the dangerous distance of thermal radiation of pool fire was calculated. The dangerous scope of vapor cloud explosion in fuel filling process was predicted with TNT equivalent method and overpressure criterion.