热油管道安全经济输油温度研究

Determination of safe and economic transportation temperature in hot oil pipelines

从热油管道安全经济输油的角度 ,讨论了确定热油管道安全经济输油温度的原则及其影响因素。分析指出 ,热油管道的允许停输时间 ,取决于管道环境、管道工作状态和输油企业的抢修能力 ;热油管道安全经济输油温度是满足管道允许停输时间要求的最低进站油温 ;热油管道安全经济输油温度取决于管道允许停输时间、管径、季节、所输原油的低温流变性、站间环境条件、管道保温条件等因素。同一地区输送同一种原油 ,管径大的管道与管径小的管道比 ,允许最低进站油温应偏低 ;同一条管道 ,夏季的允许最低进站油温应比冬季的油温低。确定热油管道允许最低进站油温不宜仅用凝点作为选择依据。

The principles of safe and economic transportation temperature in hot oil pipelines and its influencing factors were discussed.The analysis results showed that the allowed shutdown time of hot oil pipeline depended on several factors including environment condition along the transportation pipeline,working state of pipeline and the repairing ability of oil business enterprise.The safe and economic operation temperature in hot oil pipeline is the lowest temperature at the inlet of heating station to satisfy the requirement of permissible shutdown time of pipeline.The safety and economic operation temperature in hot oil pipeline depends upon some factors such as the allowable shutdown time of pipeline,seasons,diameter of pipeline,rheologic characters of crude oil,the environment along the pipeline,and piping heat insulation.The allowable oil temperature of pipeline with large diameter can be lower than that of pipeline with small diameter,while transporting the same oil in the same area.The allowable oil temperature in summer can be lower than that in winter.The condensation point is not the only basis for determining the allowable oil temperature at the inlet of heating station.