摘要
外浮顶油罐的浮盘上浮高度对浮盘上方的油气扩散过程及大气环境污染研究至关重要。以1台20000 m^(3)外浮顶油罐为研究对象,基于计算流体力学理论,采用数值模拟方法,分析了在环境风场作用下外浮顶油罐浮盘上浮高度分别为低液位(5 m)、中液位(10 m)和高液位(15 m)时油罐内壁和浮盘表面的油气浓度分布及油气扩散特性,通过实验验证了模拟结果的准确性。结果表明,随着浮盘上浮高度的增加,油罐内壁油气浓度逐渐下降,浮盘表面油气浓度先降低后升高,油气浓度聚集区域在迎风面与背风面之间扩散转移。同时,随着浮盘上浮高度的增加,环境风场的径向输运对油气扩散的影响增强,导致浮盘表面压差增大并形成不同数量、不同形状的油气扩散通道。
The height of the floating plate of the external floating roof tank is of significant importance with regard to the diffusion of oil vapors and the prevention of environmental pollution above the floating plate.The research object was a 20000 m^(3) external floating roof tank,situated in an ambient wind field and with varying floating heights(5 m,10 m,and 15 m).The distribution and diffusion characteristics of oil vapor on the inner wall of the tank and the surface of the floating plate were analyzed by numerical simulation based on the fundamental principles of computational fluid mechanics.The accuracy of the simulation results was verified by experiments.The results indicate that the oil vapor concentration on the inner wall of the tank decreases with increasing floating height,while the concentration on the surface of the floating plate initially decreases and then increases.Furthermore,the influence of radial operation of the ambient wind field on oil vapor diffusion is enhanced,while the influence of large-scale eddy currents is weakened,with increasing floating height.The pressure difference of the surface of floating plate increased and the different number and shape of oil vapor diffusion channels formed with the increase of the floating height of floating plate.
作者
罗炜超
夏威
苏童泽
李鸿泰
张思琪
谈金祝
LUO Wei-chao;XIA Wei;SU Tong-ze;LI Hong-tai;ZHANG Si-qi;TAN Jin-zhu(School of Mechanical and Power Engineering,Nanjing Tech University,Nanjing 211816,China)
出处
《石油化工设备》
CAS
2024年第5期13-20,共8页
Petro-Chemical Equipment
基金
江苏省研究生科研与实践创新计划项目(SJCX21_0527)。
关键词
油罐
外浮顶
浮盘
上浮高度
影响
油气扩散
数值模拟
tank
external floating roof
floating plate
floating height
influence
oil vapor diffusion
numerical simulation
