为解决上游堵库、下游炼厂吞吐量大的问题,西部原油管道进行二期改造,加大了外输排量,即部分输油泵更换大叶轮。对改造前后管道现状进行了分析,改造后对管道低排量(1 800 m3/h以下)运行造成配泵困难及节流和电耗过大,由此建议改造前对管道运行做好充分评估和研究;对大叶轮泵进行1 800~2 000 m3/h低排量运行测试,结果表明大叶轮泵可在低排量下正常运行,根据不同测试方法分析相关参数的变化规律并提出进行大叶轮泵测试的最佳时机。全线大排量连续运行测试结果表明,部分大叶轮泵的运行可有效降低耗电量和增加备用泵数量,同时提出了一期和二期输油泵适应性输量,为今后管道大排量安全经济运行提供了保障。 In order to solve the problem of blocking the upstream blockage and large downstream refinery throughput, the second phase of the transformation of the crude oil pipeline in the western part of China increased the output of external transportation, that is, part of the oil pump replaced the large impeller. The status quo of the pipe before and after reformation was analyzed. After the revamping, the pump was difficult to pump and the throttling and electricity consumption were too low for the low displacement of the pipeline (less than 1 800 m3 / h). Therefore, it is suggested to fully assess the operation of the pipe before the reformation And the research; the large impeller pump running low-displacement test of 1 800 ~ 2 000 m3 / h, the results show that the large impeller pump can operate normally at low displacement, according to different test methods to analyze the variation of the relevant parameters and proposed large Impeller pump test the best time. The test results of continuous operation with large displacement all over the line show that the operation of some large-impeller pumps can effectively reduce the power consumption and increase the number of spare pumps. At the same time, the adaptive output of the first and second stage oil pumps is put forward, Economic operation has provided a guarantee.