理化检验-物理分册2025，Vol.61Issue(12)：47-51,56,6.DOI:10.11973/lhjy-wl250089
某超超临界1 000 MW机组水冷壁管泄漏原因
Causes of leaks in the water-cooled wall tubes of a 1 000 MW ultra-supercritical unit
LI Yan 1WANG Bin 1CHANG Qingdong 1WEI Ran 1CHANG Wei1
作者信息
- 1. Yinchuan Branch,China Energy Science and Technology Research Institute Co.,Ltd.,Yinchuan 750000,China||State Key Laboratory of Low-carbon Smart Coal-fired Power Generation and Ultra-clean Emission(China Energy Science and Technology Research Institute Co.,Ltd.,)Nanjing 210023,China
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摘要
Abstract
A leakage occurred in the water-cooled wall tubes of a ultra-supercritical 1 000 MW unit at a power plant.The causes of the leakage were analyzed using macroscopic observation,chemical composition analysis,mechanical property testing,metallographic examination,scanning electron microscopy and energy spectrum analysis.The results show that the cracking at the welds of the front wall spiral water-cooled wall tubes and the transverse cracks near the welds were caused by thermal fatigue of the material.The transverse cracks in the left wall vertical water-cooled wall tubes formed due to the combined effects of thermal fatigue and high-temperature corrosion.关键词
水冷壁管/横向裂纹/热疲劳/高温腐蚀/泄漏Key words
water-cooled wall tube/transverse crack/thermal fatigue/high-temperature corrosion/leakage分类
通用工业技术引用本文复制引用
LI Yan,WANG Bin,CHANG Qingdong,WEI Ran,CHANG Wei..某超超临界1 000 MW机组水冷壁管泄漏原因[J].理化检验-物理分册,2025,61(12):47-51,56,6.
