摘要
某发电厂300 MW机组汽包锅炉前墙角燃烧器附近水冷壁发生爆管。通过宏观断口分析、化学成分分析、金相分析、扫描电镜分析等方法,对水冷壁管失效原因进行了分析,确定了此次爆管的主要原因为蒸汽腐蚀引起的氢脆。对失效水冷壁管进行换管处理,对机组运行进行调整,提高了机组运行可靠性。
Tube-burst occurs in water wall near the corner burner in the front of a 300MW steam drum boiler in a power plant.By means of macroscopic fracture analysis,chemical composition analysis,metallographic analysis and scanning electron microscopy,the failure cause of the water wall tube is analyzed,and the main cause of the tube-burst is hydrogen embrittlement caused by steam corrosion.The failed water wall tube is replaced and the unit operation is adjusted to improve the reliability of the unit.
作者
杨林
徐卫仙
YANG Lin;XU Weixian(Huadian Electric Power Research Institute Co.,Ltd.,Hangzhou 310030,China)
出处
《黑龙江电力》
CAS
2019年第5期437-439,447,共4页
Heilongjiang Electric Power
关键词
火电厂
水冷壁
爆管
失效分析
氢脆
thermal power plant
water wall
tube-burst
failure analysis
hydrogen embrittlement
