内浮顶油罐“小呼吸”对环境影响过程的分析  

Analysis of the Distribution of VOCs Concentration Field with Oil Static Breathing Loss in Internal Floating Roof Tank

作　　者：吴宏章[1] 黄维秋[1] 杨光[1] 赵晨露 王英霞[1] 蔡道飞[1] 

机构地区：[1]常州大学石油工程学院江苏省油气储运重点实验室,常州213016

出　　处：《环境科学》2013年第12期4712-4717,共6页Environmental Science

基　　金：国家自然科学基金项目(21101017);江苏省高校自然科学研究重大项目(11KJA610002);江苏省科技支撑计划(社会发展)项目(BE2011651)

摘　　要：内浮顶油罐结合了外浮顶油罐和拱顶油罐的优点,具有特定的蒸发损耗特点.利用自制的内浮顶油罐实验平台,研究了油罐内气体空间里的油气浓度的分布梯度、分子扩散、热扩散、强迫对流等作用对油品蒸发损耗的影响.结果表明,内浮顶油罐的"小呼吸"损耗,主要是受到温度变化引起的油气分子热扩散作用的影响.在此基础上,本研究提出了相关的降低蒸发损耗的措施以及内浮顶油罐蒸发损耗的计算公式.Internal floating roof tank has the advantages of external floating roof tank and fixed roof tank and has its own evaporation loss properties. The influences of volatile organic compounds （VOCs） distribution gradient, molecular diffusion, thermal diffusion and forced convection on the evaporation loss of oil were studied in the space of the homemade platform of an internal floating roof tank. The results showed that thermal diffusion with temperature change was the main cause for the static loss in the internal floating roof tank. On this basis, there were some measures for reduction of the evaporation loss and formulas to calculate the evaporation loss of the internal floating roof tank in this research.

关 键 词：油气浓度 浓度梯度 温度梯度 分子扩散 热扩散 

分 类 号：X51[环境科学与工程—环境工程]