1025t/h锅炉水冷壁高温腐蚀原因分析及解决措施  

CAUSE ANALYSIS OF HIGH-TEMPERATURE CORROSION OCCURRED ON THE WATER-WALL OF 1025 t/h BOILER AND SOLVING MEASURES THEREOF

作　　者：李刚[1] 李锡孝 魏铜生[2] 徐党旗[2] 孙国勇[1] 邓天鹏[1] 杨军[1] 

机构地区：[1]华能济南黄台发电有限公司,山东济南061113 [2]西安热工研究院有限公司,陕西西安710032

出　　处：《热力发电》2012年第2期53-56,共4页Thermal Power Generation

摘　　要：针对某发电公司300MW机组1 025t/h锅炉进行的燃烧调整试验表明,水冷壁产生高温腐蚀的主要原因是一次风动量偏低,刚性不足,在壁面处形成了较强的还原性气氛所致。通过增加周界风风量,提高了一次风射流动量,使水冷壁高温腐蚀缓解。此外,优化二次风配风方式可有效改善水冷壁壁面气氛,建议AB/BC/CD/DE二次风挡板按缩腰配风方式运行。对于防止水冷壁大面积的高温腐蚀,贴壁风的作用非常有限。Directing against the problem of high-temperature corrosion occurred on the water-wall of 1 025 t/h boiler for unit no.8 in one power plant,a combustion adjustment test has been carried out.Analysis shows that the main cause is the lower momentum of primary air.Through maintaining certain open-degree of the peripheral air,the momentum of primary air jet has been enhanced,making the high-temperature corrosion occurred on the water-wall to be alleviated.Besides,the distribution mode of secondary air can effectively improve the atmosphere on wall surface of the water-wall,the baffle plates of secondary air AB/BC/CD/DE have to be in operation according to the shrink-waist mode.For high-temperature corrosion in large areas,the influence of air being closed to the wall is very limited.

关 键 词：锅炉 水冷壁 高温腐蚀 周界风 贴壁风 配风方式 

分 类 号：TK223.31[动力工程及工程热物理—动力机械及工程]