基于双流体模型的人工煤气管道腐蚀预测

doi:10.11885/j.issn.1674-5086.2018.05.28.01

西南石油大学学报(自然科学版) ›› 2018, Vol. 40 ›› Issue (6): 148-156.DOI: 10.11885/j.issn.1674-5086.2018.05.28.01

基于双流体模型的人工煤气管道腐蚀预测

商博军¹, 李长俊¹, 胡镁林²

1. 西南石油大学石油与天然气工程学院, 四川成都 610500;
2. 云南中国石油昆仑燃气有限公司, 云南昆明 650200

收稿日期:2018-05-28 出版日期:2018-12-01 发布日期:2018-12-01
通讯作者: 商博军,E-mail:shangbj@petrochina.com
作者简介:商博军,1970年出生,男,汉族,湖北黄梅人,高级工程师,博士,主要从事天然气输送、管道规划建设及管网优化安全运营研究。E-mail:shangbj@petrochina.com;李长俊,1963年出生,男,汉族,湖北京山人,教授,博士生导师,主要从事油气储运系统仿真与优化、油气储运系统多相流理论与技术。E-mail:swpulcj@126.com;胡镁林,1986年出生,男,汉族,四川南充人,工程师,硕士,主要从事从事天然气输送与运营及管网优化安全运营研究。E-mail:humeilin525@163.com

Prediction of Corrosion in Artificial Gas Pipelines Based on a Two-fluid Model

SHANG Bojun¹, LI Changjun¹, HU Meilin²

1. School of Oil & Natural Gas Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
2. Yunnan PetroChina Kunlun Gas Co. Ltd., Kunming, Yunnan 650200, China

Received:2018-05-28 Online:2018-12-01 Published:2018-12-01

摘要/Abstract

摘要： 人工煤气管网中广泛存在的多相流动腐蚀是造成人工煤气管道减薄的主要原因。针对现有检测技术难以检测输送复杂介质管道的剩余壁厚的问题，以昆明市燃气管网为例，基于双流体模型进行人工煤气管网的多相流动分析，采用实验与理论研究相结合的方法，确定了人工煤气管道的腐蚀特征，计算得到管道的腐蚀情况，结果表明：管道腐蚀程度主要与持液率和CO₂分压相关；采用多相流动仿真模型平均腐蚀速率为0.054 3 mm/a，全动态多相流模拟的腐蚀预测结果存在明显误差；建立的人工煤气管网腐蚀速率预测模型误差平均值为8.9%，优于全动态多相流模拟多相流腐蚀预测结果。

关键词: 人工煤气, 管道, 多相流动, 腐蚀速率, 模型

Abstract: The pervasive corrosion induced by multiphase flow in artificial gas pipe networks is the main cause of the thinning of artificial gas pipelines. Existing techniques present difficulties for detecting the residual wall thickness of the pipelines used for conveying complex media. Using the gas pipeline network in Kunming as an example, in this study, we performed a multiphase flow analysis of the artificial gas pipeline network based on a two-fluid model. By combining experimental and theoretical research methods, we determined the corrosion characteristics of the artificial gas pipeline and calculated the corrosion condition of the pipeline. The results showed that the corrosion degree of pipeline was mainly related to the holdup rate of the liquid and the partial pressure of CO₂. The average corrosion rate calculated by the multiphase flow simulation model was 0.054 3 mm/a. Significant errors were found in the corrosion prediction results of the full dynamic multiphase flow simulation. Specifically, the average error of the model established for predicting the corrosion rate of artificial gas pipe network was 8.9%. This result was superior to the corrosion prediction obtained by full dynamic multiphase flow simulation.

Key words: artificial gas, pipeline, multiphase flow, corrosion rate, model

中图分类号:

TE985.8

商博军, 李长俊, 胡镁林. 基于双流体模型的人工煤气管道腐蚀预测[J]. 西南石油大学学报(自然科学版), 2018, 40(6): 148-156.

SHANG Bojun, LI Changjun, HU Meilin. Prediction of Corrosion in Artificial Gas Pipelines Based on a Two-fluid Model[J]. 西南石油大学学报(自然科学版), 2018, 40(6): 148-156.

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基于双流体模型的人工煤气管道腐蚀预测

Prediction of Corrosion in Artificial Gas Pipelines Based on a Two-fluid Model

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