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通过对承受最大辐射热通量32kW/m~2的外罐厚为800mm的储罐进行有限元分析,得到储罐最不利状态下的温度分布状况,证明储罐可以安全地承受该热通量。储罐在该热通量下坚持的时间与外罐的厚度有关,且在高温作用下内罐真实温度的模拟与保冷材料不同温度下的热工参数紧密相关。同时,对相距10m、20m、30m、40m、50m的储罐发生池火灾对相邻储罐的热响应进行分析,得出LNG储罐的最小安全距离为30m。实际工程中,可以通过加大外罐的厚度来提高储罐的安全储备,相邻储罐之间须满足最小安全距离的要求,防止储罐间多米诺骨牌效应的发生。
Through the finite element analysis of the tank with the outer tank thickness of 800mm, which is subjected to a maximum radiant heat flux of 32kW / m 2, the temperature distribution in the most unfavorable condition of the tank is obtained, which proves that the tank can safely withstand the heat flux . The holding time of the tank under the heat flux is related to the thickness of the outer tank, and the simulation of the real temperature of the inner tank at high temperature is closely related to the thermal parameters at different temperatures of the cold-keeping material. At the same time, the thermal response of adjacent storage tanks to pool fires of 10m, 20m, 30m, 40m, 50m tanks was analyzed, and the minimum safety distance of LNG storage tanks was 30m. In practical engineering, the safety reserve of the storage tank can be increased by increasing the thickness of the outer tank, the minimum safety distance between adjacent storage tanks must be met, and the domino effect between the storage tanks should be prevented.