为了提升液化天然气(LNG)接收站本质安全水平,本文依托PHAST定量风险分析软件,构建了工艺区集液池的池火与气体扩散、LNG储罐罐顶安全阀的喷射火与气体扩散等多事故场景数值模型。通过模拟分析热辐射强度、蒸气云浓度等关键参数的时空分布特征,系统量化获得不同事故场景下热辐射阈值与气体扩散浓度限值的空间作用范围。基于分析结果,针对性提出了设备布局优化方案、设施防护设计改进措施以及耐火保护提升策略,为LNG接收站安全设计优化提供了科学依据。
关键词: LNG接收站 / PHAST / 池火 / 气体扩散 / 喷射火 / 安全设计
Abstract:
To enhance the intrinsic safety level of liquefied natural gas (LNG) receiving terminals, this study utilizes the PHAST quantitative risk analysis software to construct numerical models for multiple accident scenarios, including pool fires and gas dispersion in process area, as well as jet fires and gas dispersion from safety valves at the top of LNG storage tanks. Through simulation analysis of the time and space distribution characteristics of key parameters such as thermal radiation intensity and vapor cloud concentration, the spatial influence ranges of thermal radiation thresholds and gas diffusion concentration limits under different accident scenarios were systematically quantified. Based on the analysis results, targeted proposals are made on improving equipment layout, facility protection design , and fire-resistant protection, providing scientific basis for optimizing the safety design of LNG receiving terminals.
Keywords: LNG receiving terminal / PHAST / pool fire / gas dispersion / jet fire / safety design