管输过程中罐底沉积物临界冲刷剥离条件的确定  

Determination of critical scour stripping conditions for tank bottom deposits during pipeline transportation

作　　者：杨明 黎键 李龙冬 谢萍 张汛 王毅杰 刘亚梅 黄启玉 YANG Ming;LI Jian;LI Longdong;XIE Ping;ZHANG Xun;WANG Yijie;LIU Yamei;HUANG Qiyu(PipeChina West Pipeline Company;College of Mechanical and Transportation Engineering,China University of Petroleum(Beijing)//Beijing Key Laboratory of Urban Oil and Gas Distribution Technology)

机构地区：[1]国家管网集团西部管道公司,新疆乌鲁木齐市830012 [2]中国石油大学(北京)机械与储运工程学院·城市油气输配技术北京市重点实验室

出　　处：《油气储运》2023年第7期808-816,共9页Oil & Gas Storage and Transportation

基　　金：国家管网集团西部管道公司科研项目“西部原油管网安全输送适应性研究”,XG-JCGL-CX-KJXX-01-JL-03/202102。

摘　　要：含蜡原油在储罐内长时间储存会形成罐底沉积物,在管道输送过程中罐底沉积物的沉降会导致管道输量降低,严重时甚至会堵塞管道。通过数值模拟方法和室内环道试验探究了罐底沉积物在输送过程中的沉降及冲刷运移规律。模拟结果表明,悬浮在低流速油流中的罐底沉积物,由于油流携带能力较弱导致罐底沉积物易在管道底部堆积。室内环道冲刷试验结果表明,油流对沉降在管道底部的罐底沉积物的冲刷剥离在于油流冲刷应力与罐底沉积物抗剪切强度之间的相互制衡作用。进而基于室内试验结果建立了临界冲刷应力与沉积物抗剪切强度之间的计算关系式,该关系式预测结果得到了现场冲刷作业结果的验证,具有在原油管道罐底沉积物处理技术领域推广运用的价值。Waxy crude oil stored in the tank for a long time will form tank bottom sediment.The settling of tank bottom deposits in oil flow during the pipeline transportation of waxy crude oil will reduce the pipeline transportation capacity,and even block the pipeline in severe cases.Herein,the settling and scour transport law of tank bottom deposits during transportation were explored through numerical simulation and the laboratory loop experiment.As indicated by the simulation results,the suspended tank bottom deposits in the low-velocity oil flow are apt to accumulate at pipeline bottom because of the weak carry-over capacity of the oil flow.Besides,the laboratory loop scour experiment shows that the scour stripping effect of oil flow to the pipeline bottom deposits depends on the balance of oil flow scour stress against the shear strength of tank bottom deposit.Hence,the laboratory experiment results were adopted to establish a calculation relation between the critical scour stress and the shear strength of the deposits.The results predicted by this relation are further verified by the experimental results and the results of field scouring operation.Therefore,it is recognized that the study is of great popularization and application value in the field of tank bottom deposit treatment technology for crude oil pipeline.

关 键 词：含蜡原油管道 罐底沉积物 沉降 冲刷运移 临界冲刷应力 

分 类 号：TE832[石油与天然气工程—油气储运工程]