摘要
为研究内浮顶储油罐浮盘密封圈油气泄漏扩散规律,建立内浮顶汽油储罐密封圈油气扩散和泄漏环宽度、速度流率估算模型,分析了在不同浮盘高度下泄漏量对内浮顶罐油气扩散的影响,进而对内浮顶罐安全风险进行讨论。结果表明:泄漏油气主要在水平方向上扩散,罐内气体空间的油气体积分数分布呈现出梯度,越靠近浮盘边圈缝隙泄漏上方的油气体积分数越高;随着泄漏量增加,内浮顶汽油储罐平均油气体积分数增大,低液位2倍、5倍和10倍泄漏量下的油气体积分数分别为0.025%、0.046%和0.069%,高液位正常及2倍、5倍和10倍泄漏量下的油气体积分数分别为0.013%、0.020%、0.037%和0.071%,低液位下100倍泄漏量时罐内大部分区域的油气体积分数将处于0.15%-0.46%范围内,已接近甚至达到爆炸极限。
In order to study the law of oil-vapor release and diffusion of floating roof seal ring in inner floating roof tanks, a two-dimensional model of inner floating roof oil tank was established. The effects of leakage amount on oil-vapor release and diffusion was analyzed, and the changes of oil-vapor volume fraction at monitoring points were recorded. The results showed that oil-vapor mainly diffused in the horizontal direction, and presented the characteristics of layered accumulation in the tank. The volume fraction of oil-vapor near the leakage ring and away from the vent was higher. The average oil-vapor volume fraction in the tank increased approximately equally with the increase of leakage amount, and oil-vapor volume fraction at the monitoring point under normal low level at 2 times, 5times and 10 times leakage rates were 0.025%, 0.046% and 0.069%, respectively. The volume fractions of oil-vapor at the monitoring point under high level at normal level, 2 times, 5 times and 10 times leakage rates were 0.013%,0.020%, 0.037% and 0.071%, respectively. In the process of oil-vapor volume fraction changing with height, there was a stable and constant oil-vapor concentration area in a certain range about 2 m above the floating plate, and the oil-vapor concentration in this area changed approximately equal proportion with the leakage amount.The volume fraction of oil-vapor in most areas of the tank was in the range of 0.15%-0.46% when the leakage amount was 100 times of the low liquid level, which was close to or even reached the explosion limit.
作者
李哲
徐振宁
马松浩
刘佳佳
贾昆
付世博
齐晗兵
LI Zhex;XV Zhen-ning;MA Song-hao;LIU Jia-jia;JIA Kun;FU Shi-bo;QI Han-bing(Northeast Sales Branch of China National Petroleum Corporation limited,Shenyang Liaoning 110013,China;Heilongjiang Key Lab of Disaster Prevention,Mitigation and Protection Engineering,Northeast Petroleum University,Daqing Heilongjiang 163318,China)
出处
《当代化工》
CAS
2022年第3期634-639,共6页
Contemporary Chemical Industry
基金
中国石油技能人才创新基金项目,内浮顶储油罐浮盘及密封泄漏在线监测技术研究(项目编号:2021-N/G-30247)
中国石油科技创新基金项目,油气管道泄漏激光检测光路杂散辐射抑制研究(项目编号: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,埋地输油管道泄漏原油热质扩散介观特性和宏观表征(项目编号:PPC2018013)。
关键词
内浮顶罐
油气体积分数
泄漏量
油气扩散
Internal floating-roof tank
Oil-vapor concentration
Leakage rate
Oil-vapor diffusion
