液化石油气储罐热响应影响因素模拟分析

液化石油气储罐在火灾作用下内部的温度和压力迅速上升, 会引起储罐爆炸, 进而酿成危害性更大的二次灾害。为了揭示液化石油气储罐对火灾的热响应规律, 介绍了液化石油气储罐在火灾下的热响应过程和机理, 应用数值模拟程序LPGTRS对热响应过程进行模拟, 并对各影响因素对热响应的影响进行了定量模拟分析。从影响储罐热响应的因素分析可知, 安全阀、绝热保护层、充装率、火焰环境温度、储罐大小等对储罐的压力和温度响应都有明显影响。因此, 可以采取增加安全阀排放面积和绝热保护层厚度, 控制储罐的充装率等, 来减缓储罐在火灾作用下的压力和温度升高速度, 从而为防止储罐爆炸和灭火救援提供时间和安全保障。

Simulating analysis of factors effecting thermal response of LPG tanks

To make clear the rule of thermal response of LPG (liquefied petroleum gas) tanks exposed to fire, this article introduces the mechanism of the thermal response of the LPG tanks exposed to fire, and makes a simulating analysis of the thermal response and its effecting factors. The analysis of the effecting factors of the thermal response shows that, the safety valve, heat insulating layer, LPG charging rate, flame temperature and dimension of the tank have obvious effect on the pressure and temperature response of the tank, therefore responding measures are put forward to slow down the rise of the pressure and temperature of the tank exposed to fire.