天然气与石油2026，Vol.44Issue(2)：24-31,8.DOI:10.3969/j.issn.1006-5539.2026.02.004
页岩气脱水装置重沸器烟火管失效分析与对策研究
Failure analysis and management measures of reboiler fire tube in shale gas dehydration unit
赵飞 1刘祥周 2李超 3李曙华 4蒋成银 2谭军2
作者信息
- 1. 中国石油天然气股份有限公司规划总院,北京 100083||中国石油天然气股份有限公司油气田节能检测实验室,四川 成都 610200
- 2. 中国石油天然气股份有限公司第三采气厂,内蒙古 鄂尔多斯 017399
- 3. 中国石油天然气股份有限公司长庆油田分公司,陕西 西安 710018
- 4. 中国石油天然气股份有限公司长庆工程设计有限公司,陕西 西安 710018
- 折叠
摘要
Abstract
To ensure the critical role of reboiler fire tubes in natural gas dehydration units,a systematic analysis of typical failure cases is conducted to reveal failure mechanisms and reduce the impact of failures during operation.The failure analysis is conducted through macroscopic morphology inspection,microscopic morphology inspection,corrosion product analysis,material chemical composition analysis,mechanical property testing,and simulation modeling.The study finds that the right-angle bend of the reboiler fire tube is a high-temperature region where high-salt mineral flowback liquids form scale on the outer wall.Internal wall scaling combined with external deposits leads to decreased heat transfer efficiency and increased tube temperature,causing plastic deformation.Cracks initiate at the right-angle bend of the fire tube due to the coupled effects of corrosion,plastic deformation,and stress.Stress concentration at crack tips further exacerbates corrosion,promoting crack propagation and ultimately resulting in cracking near the weld heat-affected zone.The results provide a reference for the design improvement and safe operation of similar devices.关键词
重沸器/烟火管/返排液/塑性变形/裂纹Key words
Reboiler/Fire tube/Flowback liquid/Plastic deformation/Crack引用本文复制引用
赵飞,刘祥周,李超,李曙华,蒋成银,谭军..页岩气脱水装置重沸器烟火管失效分析与对策研究[J].天然气与石油,2026,44(2):24-31,8.
