天然气集输场站管线弯头冲蚀磨损数值模拟研究  

Study on Erosion Numerical Simulation of Elbows of Pipelines in Natural Gas Gathering Stations

作　　者：林楠 黄辉[1] 李仕力 马红莲[1] 李杨 LIN Nan;HUANG Hui;LI Shi-li;MA Hong-lian;LI Yang(China Special Equipment Inspection and Research Institute,Beijing 100029,China)

机构地区：[1]中国特种设备检测研究院,北京100029

出　　处：《科学技术与工程》2020年第21期8543-8549,共7页Science Technology and Engineering

基　　金：国家重点研发计划(2018YFF0215000);中国石化横向课题(319008-8)。

摘　　要：集输管线中,颗粒冲蚀磨损常对管道内壁造成破坏。即使颗粒尺寸较小,累积的颗粒冲蚀磨损依然会对管壁造成严重的壁面减薄,甚至引发管线泄漏。为了研究天然气集输场站内管线的弯头冲蚀磨损,针对某集气场站站内管线弯头冲刷腐蚀减薄案例,通过机理分析和流体动力学(CFD)仿真分析方法,研究了站内管线直角弯头、圆弧形弯头及不同锥角直角弯头内壁冲蚀磨损规律。结果表明:集气场站管线内常存在冲蚀敏感区,使得管道、设施内壁易受颗粒冲蚀磨损影响;利用流体动力学仿真分析方法,可以有效预测弯头内冲蚀磨损位置分布并优化弯头结构设计;直角弯头的耐冲蚀磨损性能优于常规圆弧形弯头。可见研究石油天然气集输管线内冲刷腐蚀规律,对寿命预测、管道检测及运行安全防护都有重要的指导意义。Erosion often occurs on the inner wall of gas pipelines.Even if the particle size is small,the cumulative erosion may also cause serious damage and even leakage of pipelines.To learn erosion at elbows of pipelines in natural gas stations,mechanisms analysis and computational fluid dynamics(CFD)method were used to investigate erosion on circular elbows and square elbows at different cone angles based on a case of elbows erosion in a gas gathering station.The results show that there are erosion sensitive areas on the eroded surface of elbows that are more likely to be eroded,erosion prediction and structure design optimization of elbows could be obtained through CFD method and square elbows have better erosion resistance than regular circular elbows.Therefore,researches on erosion are important in oil and gas pipelining industry and could be a good guide for life prediction,inspection,and operational safety protection of gathering pipelines.

关 键 词：冲蚀磨损 集输管线 弯头 寿命预测 

分 类 号：TE88[石油与天然气工程—油气储运工程]