锅炉技术2024，Vol.55Issue(4)：67-72,6.
垃圾焚烧发电厂过热器管子开裂原因分析
Cracking Reasons Analysis of Superheater Tubes of a Waste to Energy Power Plant
张武能 1卢蒙 2兰光宇 3张留斌 1王吉1
作者信息
- 1. 河南九域恩湃电力技术有限公司,河南 郑州 450001
- 2. 河南北斗云谷信息技术有限公司,河南 郑州 450001
- 3. 国网河南省电力公司,河南 郑州 450052
- 折叠
摘要
Abstract
The reasons for a large number of cracks in the superheater tubes of a waste to energy power plant were analyzed,and the cracked steel tube samples were studied and analyzed by physical and chemical detection methods such as macro inspection,chemical composition analysis,hardness detection,microstructure and fracture observation,and energy spectrum analysis.The results show that the elbow of the serpentine tube has poor ovality quality and the structure of the superheater header joint is improper,all of which have higher residual stress.The crack originated from the inner wall of the pipe and expanded outward,showing obvious intergranular fracture characteristics.There is Na and P elements remaining on the fracture surface.In summary,the main reason for the cracking of the superheater pipe is the improper operation of the alkali cleaning during the boiler commissioning,which causes the alkaline liquid to flow into the superheater pipe.The alkaline liquid concentrates at the welds and elbows,with the high temperature and superimposed stress,the superheater tubes cracked because of alkali stress corrosion finally.关键词
垃圾焚烧发电厂/过热器管子/碱液应力腐蚀Key words
waste to energy power plant/superheater tubes/alkali stress corrosion分类
矿业与冶金引用本文复制引用
张武能,卢蒙,兰光宇,张留斌,王吉..垃圾焚烧发电厂过热器管子开裂原因分析[J].锅炉技术,2024,55(4):67-72,6.
