天然气集输管道弯头磨损腐蚀机理研究

项目名称： 天然气集输管道弯头磨损腐蚀机理研究

项目编号： No.51474183

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 矿业工程

项目作者： 宋晓琴

作者单位： 西南石油大学

项目金额： 83万元

中文摘要： 天然气集输管道在输送过程中，携带的微小固体颗粒会对弯头产生磨损腐蚀，同时由于硫化氢、二氧化碳的作用加速弯头处的腐蚀穿孔，进而引发集输管道的失效，造成安全隐患与经济损失。掌握弯头内壁的磨损腐蚀机理，提出弯头的特殊定制方案是提高天然气集输管道安全运行的当务之急。本项目在研究弯头磨损腐蚀机理的基础上，同时考虑硫化氢、二氧化碳对弯头的电化学腐蚀，借助于计算机软件与实验手段，分析颗粒在管道弯头内壁的运动规律与磨损量分布之间的关系，得到集输管道弯头内壁的磨损腐蚀预测方程；利用测厚仪对在役集输管道的弯头进行测量，得到弯头磨损腐蚀量的分布规律，验证磨损腐蚀速率预测方程，并对其进行修正。根据磨损腐蚀预测方程，预测不同规格弯头的磨损腐蚀速率，并对天然气集输管道的弯头提出设计方案，推动天然气集输管道弯头的特殊定制。

中文关键词： 集输管道；弯头；磨损腐蚀；固体颗粒；电化学腐蚀

英文摘要： During the process of natural gas pipeline transportation in gathering systems, the tiny solid particles carried along would result in wear corrosion to pipe elbows, influenced by the effect of hydrogen sulfide and carbon dioxide, the corrosion perforation would result in further pipeline failure and bring about potential safety hazard and economic loss. Therefore, it is urgent to enhance pipelining safe operation to understand the mechanism of wear corrosion inside pipelines and propose pipeline elbows special customization. Based on the analysis on wear corrosion mechanism of gas pipe elbows , taking the electrochemical corrosion from hydrogen sulfide and carbon dioxide to the elbows into account, with the aid of computer software and experimental methods, this project analyzes the relationship between the law of particles in pipe elbow inner walls and wear amount distribution and proposes gathering pipeline corrosion and wear prediction equation; utilizes thickness meter to measure in-service gathering pipelines' elbow thickness and obtain the distribution law of corrosion and wear amount; verifies the corrosion rate prediction equation and perform equation revision. According to wear corrosion prediction equation, it is conceivable to predict the corrosion rate of different specifications wear elbows and propose natural gas gathering pipeline elbow design scheme and hence promote natural gas gathering pipeline elbows special customization.

英文关键词： gathering pipeline;pipeline elbow;wear corrosion;solid particle;electrochemical corrosion