西南石油大学学报（自然科学版）2025，Vol.47Issue(5)：181-194,14.DOI:10.11885/j.issn.1674-5086.2023.10.07.01
考虑壁面液相分布的含硫放空管道内腐蚀模拟
Simulation of Corrosion in Sulfur-containing Venting Pipelines Considering Wall Liquid Phase Distribution
彭星煜 1廖一鸿 1徐一彬 2龚建华 3申俊3
作者信息
- 1. 西南石油大学石油与天然气工程学院,四川成都 610500
- 2. 中国石油长庆油田分公司第六采气厂,陕西西安 710000
- 3. 中国石油西南油气田公司,四川 成都 610000
- 折叠
摘要
Abstract
In order to carry out more accurately inspection of the venting pipeline of high sulfur natural gas field station,we use the CFD method to simulate the low-pressure venting pipeline with the combination of numerical simulation and on-site method,to deeply analyze the flow field distribution law,the liquid phase distribution law,and the distribution law of hydrogen sulfide in the different cross sections in the low-pressure venting pipeline,so as to predict the area of the low-pressure venting pipeline sensitive to internal corrosion,and to discuss the effect of changes of the distribution of the liquid phase at the wall surface on the internal corrosion of the high sulfur natural gas field station.The influence of liquid phase distribution changes on the wall surface on the internal corrosion of low-pressure vent pipelines in high sulfur natural gas stations was investigated.The results show that:the distribution of liquid phase in the venting pipeline of high sulfur natural gas station is the key factor leading to internal corrosion,and the 3～12～9 o'clock+6 o'clock directions of the 45° and 90° section of the second consecutive elbow at the entrance of the pipeline,as well as the 6～9 o'clock directions of the branch mouth at the tee,tend to be the most serious corrosion locations of the whole pipeline;when inspecting on-site,priority will be given to elbows and tees,and the wall thicknesses of the elbow and tee will be changed within the range of mild corrosion.If the wall thickness of these two places is within the range of mild corrosion,the detection of straight pipe section can be omitted.If the wall thickness at the tee varies beyond mild corrosion,the straight section should be tested primarily in the 6 o'clock direction.The results of the study effectively solved the problem of difficult to locate the internal corrosion position of the venting pipeline in high sulfur natural gas field station.关键词
高含硫天然气场站/放空管道/壁面液相分布/内腐蚀位置预测/数值模拟Key words
high sulfur natural gas field station/venting pipeline/wall liquid phase distribution/internal corrosion location prediction/numerical simulation分类
石油、天然气工程引用本文复制引用
彭星煜,廖一鸿,徐一彬,龚建华,申俊..考虑壁面液相分布的含硫放空管道内腐蚀模拟[J].西南石油大学学报（自然科学版）,2025,47(5):181-194,14.
