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胶凝原油管道启动压力计算方法
肖文涛,张国忠,刘刚,陈中良,张井鲁,翟克平
0
(中国石油化工股份有限公司抚顺石油化工研究院,辽宁抚顺 113001;中国石油大学储运与建筑工程学院,山东青岛 266580)
摘要:
基于启动波速理论提出一种新的胶凝原油管道启动模型。该模型用于模拟胶凝原油管道初始启动过程中的压力和流量变化,最终给出管道的启动压力及启动时间。结果表明:随着启动波前锋的推进,管道入口流量逐渐减小,管道沿线的压力逐渐增长,但由于启动波前锋上游管段内凝油结构的裂解,管道沿线的压力梯度逐渐趋于平缓。管道内径越大,启动压力越小,启动时间越短;管道壁厚越大,启动压力越大,启动时间越短。受管道弹性及凝油可压缩性的影响,胶凝原油管道的启动压力远小于4(τy0y1)L/D。
关键词:  胶凝原油  黏塑性流  管道  启动波速  启动压力  启动时间
DOI:10.3969/j.issn.1673-5005.2013.06.019
投稿时间:2013-04-10
基金项目:国家自然科学基金项目(50904077)
Calculation method of start-up pressure of pipeline for gelled crude oil
XIAO Wen-tao,ZHANG Guo-zhong,LIU Gang,CHEN Zhong-liang,ZHANG Jing-lu,ZHAI Ke-ping
(Fushun Research Institute of Petroleum and Petrochemicals, SINOPEC, Fushun 113001, China;College of Pipeline and Civil Engineering in China University of Petroleum, Qingdao 266580, China)
Abstract:
A new start-up model of pipeline for compressible gelled crude oil was put forward based on the start-up wave velocity. This model can be conveniently used to simulate the initial transient pressure and flow rate during the start-up of pipeline applying centrifugal pump, and finally predict the start-up pressure and time. The results show that with the advancement of start-up wave front, the flow rate at pipeline inlet gradually declines, and the pressure along pipeline gradually increases. Because of the breakdown of upstream gel structure of the start-up wave front, the pressure gradient along pipeline tends to be gentle. With the increase of inside diameter, the start-up pressure and time of pipeline decrease. With the increase of wall thickness, the start-up pressure of pipeline increases, yet the start-up time decreases. Thanks to the elasticity of pipeline and the compressibility of gelled crude oil, the start-up pressure is far lower than 4(τy0y1)L/D.
Key words:  gelled crude oil  viscoplastic flow  pipeline  start-up wave velocity  start-up pressure  start-up time
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