浅谈输油管道大落差段工艺优化设计

Brief Study about Technological Design Optimization for the Big Drop Section of Oil Pipeline

长距离输油管道经过翻越点时,由于系统存在多余的能量,翻越点后大落差段,管内油品的流动状态将发生改变,可能引发水击、振动、气蚀、气液两相流等问题,给管道的安全运行带来一系列的技术和管理难题,因此,需对翻越点后大落差段管道的压力实施有效控制。在对国内外典型大落差输油管道进行调研的基础上,梳理了大落差段工艺措施,提出了长距离、大落差段管道的有效工艺措施,并给出了输油工艺优化方法、具体步骤和优化案例,同时,对减压站工艺设计中过滤系统、安全泄压系统、压力保护系统的设计及减压阀选型提出了建议。

Due to the existence of slack flow after turnover point in the long distance and big drop oil transportation pipeline, it can bring out a series of technical and management problems for pipeline design and safe operation which are water hammer, vibration, cavitation and two phase flow. So, it's necessary to correctly control the pressure of big drop pipeline after the pipeline turnover point. Based on a lot of surveys of typical big drop pipelines at home and abroad, the paper summarized the various process design measures of big drop pipelines, then proposed the optimal technological method for the long distance & big drop pipeline sections and put forward the optimization methods, steps and cases and finally give some suggestions about the filtering systems, safety relief systems, over pressure protection systems and selection of relief valves during the design of pressure reducing station.