液化天然气卸料臂紧急脱离工况下LNG泄漏扩散模拟分析  

SIMULATION ANALYSIS OF LNG LEAKAGE AND DIFFUSION UNDER EMERGENCY DETACHMENT CONDITION OF LNG UNLOADING ARM

作　　者：王飞 翟振城 吕肖 杨亮 窦星 Wang Fei;Zhai Zhencheng;Lyu Xiao;Yang Liang;Dou Xing(Pipe China Nanshan(Shandong)LNG Co.,Ltd.,Longkou,Shandong,265706;CNOOC Gas and Power Group Ltd.,Beijing,100028)

机构地区：[1]国家管网集团南山(山东)天然气有限公司,山东龙口265706 [2]中海石油气电集团有限责任公司,北京100028

出　　处：《石油化工设备技术》2025年第2期42-48,I0003,共8页Petrochemical Equipment Technology

摘　　要：LNG卸料臂是LNG运输船与接收站管线之间的重要连接通道,是接收站的核心设备。采用PHAST软件对某项目规格为16″的LNG卸料臂在紧急脱离工况下的LNG泄漏、天然气扩散、火灾及爆炸等后果进行了模拟,结果表明:总体上,竖直向下泄漏比竖直向上泄漏的后果严重程度高;竖直向下泄漏场景中,LNG有可能接触下方甲板并形成液池;各类可能导致严重后果的场景中,天气类型为1/F、竖直向下泄漏时发生蒸气云爆炸的影响距离最远,理论上致死率为1的影响范围为下风向31.71 m。文章根据分析结果提出了相关建议,以便有针对性地采取有效保护措施,同时还需加强对船舶以及码头人员活动的管理,以保障LNG卸料臂长周期安全可靠运行。LNG unloading arm is an important connection channel between LNG carrier and receiving station pipeline,and is the core equipment of receiving station.The PHAST software was adopted to simulate the consequences of LNG leakage,natural gas diffusion,fire and explosion under the emergency detachment condition of the 16″LNG unloading arm of one project.The results show that in general,the consequences of vertical downward leakage are more serious than those of vertical upward leakage;in the vertical downward leakage scenario,LNG may contact the lower deck and form a liquid pool;in all kinds of scenarios that may lead to serious consequences,the influence distance of jet fire is the furthest when the weather type is 1/F and the vertical downward leakage occurs;the influence range of the theoretical fatality rate 1 is 31.71 m downwind.Based on the analysis results,relevant suggestions are put forward for targeted and effective protection.Meanwhile,management of ship and dock personnel activity is strengthened to ensure the safe and reliable operation of the LNG unloading arm for a long period.

关 键 词：卸料臂 紧急脱离 气云扩散 火灾 爆炸 

分 类 号：TE88[石油与天然气工程—油气储运工程]