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Thermo-hydraulic features of a diluted heavy crude pipeline

WAN Yufei1,DENG Daoming1,LIU Xia2,ZENG Dechun2,LI Hongfu2,LI Liwan1,XUE Junzhao1   

  1. 1National Engineering Laboratory for Pipeline Safety,Beijing Key Laboratory of Urban Oil and Gas Distribution Technology,China University of Petroleum,Beijing 102249,China;2Oil & Gas Storage and Transportation Branch,Xinjiang Oilfield Company,Karamay 834002,Xinjiang,China
  • Online:2014-09-05 Published:2014-09-05

稠油掺稀管道输送工艺特性

万宇飞1,邓道明1,刘霞2,曾德春2,李洪福2,李立婉1,薛君昭1   

  1. 1中国石油大学(北京)油气管道输送安全国家工程实验室,城市油气输配技术北京市重点实验室,北京 102249;2新疆油田油气储运分公司,新疆 克拉玛依 834002

Abstract: This paper investigated the thermo-hydraulic characteristics of diluted heavy crude insulated WK pipeline,and calculated the safe flow rate ranges. Results showed:①Unsteady working zones,which demonstrate sharp increases in pressure losses with decreased flow rates,occurred to the hot diluted heavy crude pipeline. ②With increasing dilution ratios,the unsteady zones moved to smaller flow rates,and hence safe working zones of the pipeline were enlarged. ③The maximum throughputs of WK pipeline did not increase monotonously with dilution ratios or/and its inlet temperatures,and its maximum pipelining capacities took place at certain dilution ratios and inlet temperatures. ④The total pressure drops of WK pipeline were considerably affected by dilution ratios and flow rates,but not by seasons. ⑤Flow rates had significant impacts on the total temperature drops of WK pipeline,but dilution ratios and seasons did not have such impacts. ⑥With regard to the same dilution ratios and inlet temperatures,the outlet temperatures,critical flow rates and the maximum throughputs of the pipeline differed little in different seasons.

Key words: diluted heavy crude, heated transportation, viscosity, flow characteristics, safety, pipelining capacity

摘要: 对国内某WK掺稀稠油保温管道,进行工艺特性分析和安全输送能力计算。结果表明:①加热输送的掺稀稠油管道存在随输量减小压降急剧增大的不稳定区;②掺稀比增大时,管道的不稳定工作区左移,安全输送的临界输量减小,有利于管道在低输量下安全运行;③最大输送能力并非随掺稀比或首站出站油温单调递增;在某一掺稀比和/或首站出站油温下,WK掺稀稠油管道具有最大输送能力;④WK线的整体压降受掺稀比、输量的影响较大,但季节对压降的影响很小;⑤WK线整体温降主要受输量影响,而掺稀比、季节对其影响不大;⑥对于同一种掺稀比稠油和同样的出站温度,在不同季节下的末站进站温度、临界输量以及最大输送能力相近。

关键词: 掺稀稠油, 加热输送, 黏度, 工艺特性, 安全, 输送能力

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