不停输原油管道大修对站间运行参数的影响

Impact of Running Oil Pipeline's Overhaul on its Operation Parameters

对防腐层老化管道进行大修时,由于开挖段传热系数增大,必然影响站间的运行参数。为保证输油管道的安全运行,研究了输油管道不停输大修对站间运行参数的影响。根据输油管道防腐层大修开挖后稳定运行时的运行数据,采用分段法计算埋地输油管道在线修复时管道的运行参数。计算结果表明,由于挖开段的传热系数增大,站间温降、压降、散热损失、粘度都随之增大,因此在管道大修开挖时,需要根据开挖长度对管道运行参数和管道结构的影响来确定合理的大修开挖长度,保证管道大修安全进行。

When repair is carried out on pipelines with aging anticorrosive coatings,increasing coefficient of heat transmission will impact operation parameters of stations-intersite. For pipeline safety, studies are conducted to the impact of running oil pipeline's overhaul on operation parameters. According to the data of stable operation after pipeline excavation, the paper adopts a fractionation method to calculate the operation parameters of the repairing pipeline. Calculation results show that the temperature drop,pressure drop,heat loss and viscosity of stations-intersite will increase along with the increasing of the heat transfer coefficient of the opening section. When opening repair is carried out on pipelines, proper pipeline excavating lengths shall be determined according to the effect of pipeline excavating lengths on operation parameters and pipeline structure so as to ensure safety operation of pipeline overhaul.