内浮顶油罐浮盘油气扩散规律影响分析  

Influence Analysis on Oil Vapor Diffusion Law of Floating Plate of Inner Floating Roof Tank

作　　者：徐振宁 李哲[1] 马松浩 刘佳佳[1] 贾昆[1] 付世博 齐晗兵[2] Xu Zhenning;Li Zhe;Ma Songhao;Liu Jiajia;Jia Kun;Fu Shibo;Qi Hanbing

机构地区：[1]中国石油天然气股份有限公司东北销售分公司,辽宁沈阳110013 [2]东北石油大学,黑龙江省高校防灾减灾工程与防护工程重点实验室,黑龙江大庆163318

出　　处：《石油库与加油站》2022年第2期1-5,M0002,共6页Oil Depot And Gas Station

基　　金：中国石油技能人才创新基金项目(2021-N/G-30247);中国石油科技创新基金项目(2018D-5007-0608);石油石化污染控制与处理国家重点实验室开放基金项目(PPC2018013)。

摘　　要：研究内浮顶油罐浮盘上部气体空间的油气扩散运移规律对油罐安全隐患的管控具有重要意义。基于流体动力学(CFD)及Realizable k-ε湍流模型,建立内浮顶汽油储罐油气扩散和泄漏环宽度与速度流率估算模型,考察分析了浮盘分别位于罐内低、中、高三种液位时罐内的油气扩散机理。研究结果表明,泄漏油气的扩散速度随着浮盘的升高而加快,罐内的平均油气浓度降低,内浮顶油罐内监测点在低、中、高液位下的油气体积分数分别为0.0154%、0.0136%和0.0107%;浮盘高度的提升增大了通气孔的影响,使通气孔附近的油气扩散速度加快。在低液位时,随着油气泄漏量的增加,浮盘上部气体空间平均油气浓度增大,低液位5倍、10倍、100倍泄漏量下的油气体积分数分别为0.046%、0.069%、0.368%,将泄漏速度扩大100倍后,已经达到爆炸极限,应采取相应措施及时管控。It is of great significance to study the law of oil vapor diffusion and migration in the gas space above the floating plate of inner floating roof oil tank.Based on computational fluid dynamics(CFD)and Realizable k-ε turbulence model,the estimation models of oil vapor diffusion,wide leakage circularity and velocity flow rate of inner floating roof gasoline storage tank are established,and the oil vapor diffusion mechanism in the tank when the floating plate is located at low,medium and high liquid levels in the tank is investigated and analyzed.The results show that the diffusion rate of leaked oil vapor increases with the elevation of floating plate,and the average oil vapor concentration in the tank decreases.The oil vapor volume fractions at low,medium and high liquid levels in the inner floating roof tank are 0.0154%,0.0136% and 0.0107% respectively.The elevation of the height of the floating plate increases the influence of the vent and speeds up the diffusion of oil vapor near the vent.At low liquid level,with the increase of oil vapor leakage,the average oil vapor concentration in the gas space above the floating plate increases.The oil vapor volume fractions at 5 times,10 times and 100 times of leakage at low liquid level are 0.046%,0.069%and 0.368%respectively.After expanding the leakage rate by 100 times,the explosion limit will be reached,and corresponding measures should be taken to control in time.

关 键 词：石油库 内浮顶油罐 浮盘 油气 扩散 规律 研究 

分 类 号：TE88[石油与天然气工程—油气储运工程]