学术
摘 要:
对汕头热电一厂4号锅炉水冷壁管频繁爆管进行了检查分析，根据水冷壁管爆口外观特征、金相检验、垢样化验和机组水质检查结果，可确认垢下碱性腐蚀是造成爆管的主要原因。阐述了垢的形成及垢下碱性腐蚀的机理。在更换失效管段以后，通过改造除氧器及加强水质化学监控等措施，有效地解决了水冷壁爆管问题。[著者文摘]
文章出处:
《发电设备》-2008年1期 -49-52页
分 类 号:
文献标识码:
A
文章编号:
1671-086X（2008）01-0049-04
Cause Analysis and Remedy for Tube Burst Failures Occurring to a 130 t/h Boiler Water Wall
HUANG Zheng-bin （Guangdong Shantou No. 1 Thermal Power Plant, Shantou 515000, China）
Abstract:
By way of visual checking and metallographic examination on the rupture surfaces of tubes of boiler No. 4 in Shantou No. 1 Thermal Power Plant and based on water quality analysis, under-deposit alkali corrosion has been found to be the main cause of tube burst failures frequently occurring to the boiler. The formation process of deposit and the mechanism of under-deposit alkali corrosion are illustrated. After replacement of the failed tube section, the problem has been effectively solved by altering relevant deaerators and enhancing water quality control.[著者文摘]
Key words:
energy and power engineering; boiler; water wall; tube burst; under-deposit alkali corrosion; feedwater deaeration; water quality control
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