兰郑长成品油管道投产运行问题

Problems of Commissioning and Operation for Lanzhou-Zhengzhou-Changsha Products Pipeline

2009年兰郑长成品油管道试运投产期间,出现了流量监测设备不具备投用条件,充水初期流量控制难度较大,兰州低压区停泵超压,清管器发送时机选择不当,气阻影响输油泵正常运行,以及过滤器误切换等问题。指出了问题产生的原因及相应的处理措施,比如根据泵机组的"流量-扬程"特性曲线,通过计算泵机组提供的扬程,推断出站流量;控制干线流量的出站调节阀开度宜小不宜大;在给油泵和输油主泵之间设置安全阀;在水充满0号高点和7号阀室的第2个U形管段后发球等。其中的实践经验对今后成品油管道的投产作业具有工程借鉴意义。

In 2009,many technical problems occurred during Lanzhou—Zhengzhou-Changsha Products Pipeline commissioning,forexample.flowrate monitoring equipment did not match the commissioning conditions,it was difficult to controI the flowrate duringinitiaL water fiIIing stage,the pump stopped and overpressure occurred at Lanzhou Iow pressure pipeliRe section,the time tolaunch pig is not appropriate,the normaI operation of pump was influenced by air Iock,and the f¨ter falsely switched and so onThe reasons of those problems and correspOnding measures are given,for example,according to the H—Q characteristic curves ofpump unit.the discharge flow is deduced through calculating the head provided by pump unit,small openness of the dischargeregulating valve that controls the trunk IiRe flowrate is much more suitable than the large one,safety valve should be installedbetween the booster pump and the main pump,the pig should be launched after both of the second U—pipe segment of #7 valvechamber and # 0 high point are fuII of water lt is considered that the commissioning practice in the pipeline is of significantmeaning for the commissioning operation of products pipeline in the future