660MW超超临界机组直流锅炉全保护加氧处理下高温氧化腐蚀在线监测技术研究  

Study on on-line Monitoring Technology of High Temperature Oxidation Corrosion of Once-through Boiler of 660MW Ultra-supercritical Unit under Full Protection and Oxygen Treatment

作　　者：王涛 贾贺然 周博 张保军 丁峰 刘忠 曹铁铸 WANG Tao;JIA He-ran;ZHOU Bo;ZHANG Bao-jun;DING Feng;LIU Zhong;CAO Tie-zhu(CHN ENERGY Jiaozuo power Plant,Jiaozuo 454350,China;Beijing Ruiaobo Science and Technology development Co.,Ltd.Beijing 100091,China;Institute of Special Equipment Testing.Beijing 100026,China)

机构地区：[1]国家能源集团焦作电厂有限公司,河南焦作454350 [2]北京蕊奥博科技开发有限责任公司,北京100091 [3]中国特种设备检测研究院,北京100026

出　　处：《全面腐蚀控制》2022年第2期1-6,共6页Total Corrosion Control

摘　　要：基于痕量溶解氢含量测定的新型热力系统锅炉"四管"(省煤器管、水冷壁管、过热器管、再热器管)腐蚀与氧化在线监测系统首次应用在某电厂660MW超超临界直流锅炉水汽系统中。该电厂在原有AVT(O)给水处理的运行中引入给水加氧处理(OT),通过加氧处理前后给水、过热蒸汽和再热蒸汽取样点水汽指标的监测,验证了此系统对溶解氢含量进行在线实时监测的重要性,对"四管"腐蚀防护和电厂运行提出了指导性建议。A new type of thermal system boiler‘four-tube’(economizer tube,water wall tube,superheater tube,reheater tube)corrosion and oxidation online monitoring system based on the determination of trace dissolved hydrogen was first applied to the 660 MW supercritical once-through boiler water vapor system in Jiaozuo.The power plant introduced oxygen treatment(OT)of feed water in the original treatment AVT(O).Through the monitoring of water vapor indicators at sampling points of feed water,superheated steam and reheated steam before and after oxygen treatment,the importance of online real-time monitoring of dissolved hydrogen by this new system was verified,and‘four-tube’corrosion protection and guiding suggestions for plant operation were also put forward.

关 键 词：超超临界直流锅炉 水汽系统 溶解氢 给水加氧处理 “四管”腐蚀防护 

分 类 号：TE866[石油与天然气工程—油气储运工程]