成品油管道拖尾油形成机理研究

doi:10.11885/j.issn.1674-5086.2019.01.03.01

西南石油大学学报(自然科学版) ›› 2020, Vol. 42 ›› Issue (4): 155-164.DOI: 10.11885/j.issn.1674-5086.2019.01.03.01

成品油管道拖尾油形成机理研究

刘恩斌¹, 李文胜¹, 蔡泓均^1,2, 谢萍³, 尚臣³

1. 西南石油大学石油与天然气工程学院, 四川成都 610500;
2. 中国航空油料集团有限公司, 四川成都 610200;
3. 中国石油西北联合管道有限责任公司, 新疆乌鲁木齐 830001

收稿日期:2019-01-03 出版日期:2020-08-10 发布日期:2020-08-10
通讯作者: 刘恩斌,E-mail:sunriselebpsb@163.com
作者简介:刘恩斌,1980年生,男,汉族,四川遂宁人,教授,博士,主要从事油气管网仿真与优化技术、瞬变流、计算流体力学等方面的科研教学工作。E-mail:sunriselebpsb@163.com;李文胜,1993年生,男,汉族,山东青岛人,硕士研究生,主要从事成品油管道运行关键技术方面的研究。E-mail:201721000517@stu.swpu.edu.cn;蔡泓均,1993年生,男,汉族,四川南充人,硕士研究生,主要从事航空油料的储存运输工作。E-mail:hoganchoi66@gmail.com;谢萍,1972年生,女,汉族,甘肃武威人,高级工程师,硕士,主要从事油气管道安全经济输送方面的研究工作。E-mail:xieping@petrochina.com.cn;尚臣,1987年生,男,汉族,青海互助人,工程师,主要从事油气储运工艺、设备、全尺寸爆破试验等方面的研究工作。E-mail:xbgdsc@petrochina.com.cn
基金资助:
四川省应用基础研究项目（2019YJ0352）；四川省自然资源厅科研项目（KJ-2019-11）

Study on Formation Mechanism of Trailing Oil in Product Oil Pipeline

LIU Enbin¹, LI Wensheng¹, CAI Hongjun^1,2, XIE Ping³, SHANG Chen³

1. Petroleum Engineering School, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
2. China National Aviation Fuel Group Limited, Chengdu, Sichuan 610200, China;
3. Northwest United Pipeline Co. Ltd., PetroChina, Urumqi, Xinjiang 830001, China

Received:2019-01-03 Online:2020-08-10 Published:2020-08-10

摘要/Abstract

摘要： 拖尾油是混油的尾段。在成品油顺序输送过程中不可避免地会产生拖尾油，而拖尾油会污染后行油品。在盲管段主要是由于死油区的前行油品混入主管而形成拖尾油。传统的混油量计算式没有考虑拖尾油的影响，采用雷诺时均法对紊流进行模拟计算，利用CFD对不同的流速及盲管长度的情况进行模拟得到混油相关实验数据，模拟结果表明，盲管中油品替换速度与流速呈指数关系，为使混油量较小，流速最好控制在1.6 m/s内。盲管长度与油品替换时间呈指数关系，为减少混油量，盲管长度应小于5倍主管管径。利用MATLAB对盲管段油品替换时间、盲管长度和流速进行多元非线性拟合，得到盲管段所产生的拖尾油长度，结合混油长度计算的Austin-Palfery式得到混油长度的计算修正公式。对比现场实际数据表明，修正公式计算得到的混油量更加接近实际值。

关键词: 顺序输送, 拖尾油, 盲管, 混油量, 计算修正

Abstract: Trailing oil is the tail section of contamination in oil pipelines. It is generated in batch transportation, and it has an effect on the quality of oil. In the dead-leg section, the main reasons for the formation of trailing oil contamination is the outflow of the preceding batch that remains in the dead-legs. The traditional calculation formula of oil mixing does not consider the influence of trailing oil. The Reynolds time-averaged method is used to simulate turbulence. To obtain contamination-related experimental data, Computational Fluid Dynamics (CFD) software is used to simulate different flow rates and bypass lengths. The oil replacement rate in a dead-leg is exponentially related to the flow speed and the length of the dead-leg is exponentially related to the replacement time of the oil. To reduce the amount of contamination, the main flow speed should be kept at about 1.6 m/s, and the length of the dead-leg should be less than five times the diameter of the main pipe. The MATLAB software was used to perform multi-nonlinear regression for the oil substitution time, the length of the dead-leg, and the flow speed to calculate the contamination length. A modified equation for calculating the length of the contamination was obtained by combining the Austin-Palfery equation with new factors. Using engineering data, the contamination predicted by the corrected equation is closer to the actual contamination than that predicted by other equations.

Key words: batch transportation, trailing oil, dead-leg, contamination, modified equation

中图分类号:

TE832

刘恩斌, 李文胜, 蔡泓均, 谢萍, 尚臣. 成品油管道拖尾油形成机理研究[J]. 西南石油大学学报(自然科学版), 2020, 42(4): 155-164.

LIU Enbin, LI Wensheng, CAI Hongjun, XIE Ping, SHANG Chen. Study on Formation Mechanism of Trailing Oil in Product Oil Pipeline[J]. 西南石油大学学报(自然科学版), 2020, 42(4): 155-164.

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成品油管道拖尾油形成机理研究

Study on Formation Mechanism of Trailing Oil in Product Oil Pipeline

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