某超超临界660 MW机组锅炉水冷壁结垢严重的原因分析  

Cause Analysis on Severe Scaling of Water Wall in an Ultra-Supercritical 660 MW Unit

作　　者：杨俊[1] 邵国华[2] 曹松彦[1] 柯于进[1] 陆军[1] 刘炎伟 乔越 YANG Jun;SHAO Guo-hua;CAO Song-yan;KE Yu-jin;LU Jun;LIU Yan-wei;QIAO Yue(Xi'an Thermal Power Research Institute Co.,Ltd.,Xi'an 710054,China;Huaneng Changxing Power Plant,Changxing 313105,China)

机构地区：[1]西安热工研究院有限公司,陕西西安710054 [2]华能长兴电厂,浙江长兴313105

出　　处：《材料保护》2020年第1期186-189,193,共5页Materials Protection

摘　　要：某电厂超超临界660 MW机组水冷壁结垢严重,为了找出其原因并提出解决方案,对水冷壁割管检测结垢量、垢样元素和物相分析、水汽质量分析、化学清洗分析、水冷壁超温分析等展开了研究。结果表明:锅炉运行中水冷壁严重超温运行是导致锅炉水冷壁结垢严重的主要原因,且不可忽视基建期化学清洗后残余垢量的影响。同时对后期机组运行提出了针对性建议,为以后电厂化学监督人员对水冷壁结垢提供了分析方法和理论指导。Based on severe scaling of water wall in an ultra-supercritical 660 MW unit as the research subject,the cause was analyzed in many ways including scale quantity test of pipes cut from the water wall,scale sample elements and phase analysis,as well as analysis of water quality,chemical cleaning,water wall overheat aspects. Results showed that in the operation of the boiler water wall,the serious overheat operation was the main cause of boiler water wall fouling severely,and the influence of the amount of residual dirty after chemical cleaning in the construction period could not be ignored. Meanwhile,the corresponding proposals were put forward on the unit running,which provided many methods and theoretical guidance for the power plant chemistry supervision personnel about the water wall scaling analysis.

关 键 词：电厂 水冷壁 结垢 超温 高温腐蚀 化学清洗 

分 类 号：TG172[金属学及工艺—金属表面处理]