稠油管道与柴油管道同沟敷设热力分析  

Thermodynamic Analysis on Both Heavy Oil Pipeline and Diesel Oil Pipeline Laying in One Trench

作　　者：万捷[1] 李卫涛[1] 曹喜文[1] 丁川[1] 

机构地区：[1]新疆石油勘察设计研究院(有限公司),新疆克拉玛依834000

出　　处：《石油工程建设》2015年第6期31-33,共3页Petroleum Engineering Construction

摘　　要：某油田稠油外输采用掺柴油降黏输送工艺,稠油管道加热外输,柴油管道常温输送,两条管道同沟敷设。对于同沟敷设的管道(特别是加热输送的油品管道),管道之间的相互热影响情况需要研究与探讨。在介绍了工程概况的基础上,应用特征线法推导出描述管内非稳定流动及油流温度分布的特征线方程,并通过差分法求出管道各节点温度的表达式,而后利用ANSYS进行计算。计算结果表明:柴油管道对稠油管道前段基本无热影响,对后段进站有微小正的影响,在设计中可以不予考虑,但在施工中一定要确保保温层的厚度及质量,并严格按规定包裹管道,否则会使管道散热增大,导致稠油进站温度降低。An oilfield applies the transportation process of blending diesel oil into heavy oil to decrease viscosity, in which the heavy oil pipeline adopts heating transmission mode, the diesel oil pipeline adopts normal temperature transmission mode. Both pipelines are laid in one trench. The mutual thermal influence between the two pipelines should be researched. This paper uses the method of characteristics to derive the equation of charac- teristics that describes unstable flow and its temperature distribution in the pipeline, and obtains temperature expression at pipeline nodes by difference method, then applies ANSYS to calculate. The calculation results show that the diesel oil pipeline has basically no thermal influence on the front section of the heavy oil pipeline and has slight positive influence on the back-end section so that it can be ignored in design, but the thickness and quality of the thermal insulation layer must be ensured in construction. Otherwise, the thermal dissipation will increase and lead to decrease the temperature of heavy oil entering the station.

关 键 词：稠油管道 柴油管道 同沟敷设 热力影响 ANSYS 加热输送 

分 类 号：TE973[石油与天然气工程—石油机械设备]