含硫油品储罐自燃灾害的点热源反演识别方法

Identification of spontaneous combustion disaster source for tank of oil containing sulfur based on inversion method of point heat source

为预防含硫油品储罐自燃灾害的发生,提出一种储罐自燃灾源的识别方法。以储罐自燃灾源为研究对象,利用有限元分析方法模拟储罐导热过程,结合点热源反演法,识别自燃灾源的深度与强度,并通过对比实际温度场和反演温度场来验证点热源反演法的适用性。结果表明:储罐内自燃灾源的深度和强度是影响罐壁外表面温差的重要因素。自燃灾源强度一定时,热源深度越大,储罐外表面温差减小得越快,自燃灾源的探测难度就越大。储罐外表面温度异常区域0.06 m内,环境温度越高,储罐外表面温差越小,自燃灾源的探测难度越大;储罐外表面温度异常区域0.06 m外,环境温度对储罐外表面的温差影响很小。

To prevent the occurrence of spontaneous combustion disaster of storage tank of oil containing sulfur, a method of identifying spontaneous combustion source was put forward. The spontaneous combus- tion disaster source of tank was considered as a research object. Its thermal process was simulated with finite element analysis method. Both the depth and intensity of spontaneous combustion source were identified on basis of point heat source inversion method. Applicability of this method was verified by a comparison between measured and inversion temperatures. The results show that depth and intensity of heat source are important factors affecting the temperature difference of surface on tank, that bigger the depth of heat source is, the harder detection of spontaneous combustion source, that higher environment temperature is, the bigger temperature different of surface on tank, that when surface distances are less than 6 era, the higher the environment temperature, the smaller surface temperature difference, and greater the difficulty of detecting spontaneous combustion source, and that when surface distance is greater than 6 cm, the environment temperature will hardly affect the temperature difference of tank surface.