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成品油管道运行过程中产生的混油难以全部回掺处理。混油拖尾、油源油品质量潜力、管输油品品种变化、清管操作及油品质量标准等因素均会对混油量和混油处理工作产生影响。基于对以上因素的分析结果,华北成品油管网逐步在管输运行管理环节采取限定最小顺序批量、合理安排输油顺序、调整油品流向及控制注入油品质量等措施;在站场工艺环节,进行注入及下载切换流程改造、增加中间站混油回掺设施等技术改造。实际应用结果表明:上述措施可有效控制批次混油量,增加管网混油回掺处理能力及灵活性,实现混油全部回掺处理。针对管道设计阶段,提出增加末站混油罐容、合理设置结点站连通流程等建议。
Oil produced during operation of the oil pipeline is difficult to fully mix the oil. Factors such as tailing of mixed oil, potential of oil source quality, variety of tube delivery, pigging operation, and oil quality standards all have an impact on the amount of mixed oil and mixed oil treatment. Based on the analysis of the above factors, North China’s refined oil pipeline network gradually take the management of pipeline transportation to take the minimum order of batch, the rational arrangement of the oil order, adjust the flow of oil and control the quality of injected oil and other measures; site process, To inject and download the switching process to transform, increase the middle station mixed with oil back to the technical transformation and other facilities. The practical application shows that the above measures can effectively control the amount of oil mixed in the batch, increase the mixing capacity and flexibility of back mixing treatment of the mixed oil pipe network, and achieve full back mixing treatment. Aiming at the design stage of pipelines, some suggestions are put forward, such as increasing the capacity of terminal oil mixing tank and setting up the connection process of node stations reasonably.