摘要
围绕电站锅炉普遍采用的低NOx燃烧技术应用中可能导致的水冷壁腐蚀问题,主要综合了美国电力研究所(EPRI)的经验和数据,在分析不同腐蚀原理的基础上系统分析了水冷壁产生腐蚀的可能原因和影响因素,并从运行优化和金属材料两方面介绍了如何防止水冷壁腐蚀的主要措施。
To address water-wall corrosion in utility boilers particularly super-critical boilers with low NOx combustion, the achievements and experiences of USA studies in corrosion mechanisms and mitigation technologies are systematically reviewed. The main corrosion mechanisms is： the deposition of FeS on water-walls under reducing atmosphere and the subsequent FeS decomposition and oxidation on the walls under alternating reducing/oxidizing atmosphere cause severe corrosion. While refined combustion optimization can promote in-flame FeS oxidation to alleviate corrosion, enhancing corrosion resistance of the material through thermal spray and weld overlay is effective measure.
出处
《江苏电机工程》
2015年第1期69-72,共4页
Jiangsu Electrical Engineering
关键词
低NOX燃烧
水冷壁腐蚀
机理
防腐技术
low NOx combustion
water-wall corrosion
mechanism
mitigation methods
