摘要
为解决超临界循环流化床锅炉炉膛水冷壁耐磨层在高温气固冲刷下易失效的问题,以某350 MW机组典型故障区域为对象,构建了由表面预处理、金属陶瓷喷涂、镍基堆焊及焊后热处理构成的分阶段修复工艺体系,并进行了修复后运行监测与经济性评估。结果表明,该修复方案显著降低了管壁减薄速率与热斑异常区数量,爆管率为零,且较整段更换方案大幅节约成本。研究为同类型高参数锅炉的水冷壁再制造提供技术支撑与推广依据。
To address the issue of frequent failures in the wear-resistant layer of water-cooled walls in supercritical circulating fluidized bed(CFB)boilers under high-temperature gas-solid erosion.This study focuses on a typical failure region in a 350 MW unit and establishes a staged repair process comprising surface pretreatment,metal-ceramic spraying,nickel-based overlay welding and post-weld heat treatment.Post-repair monitoring and economic evaluation showed that the wall thinning rate and the number of thermal anomalies were reduced significantly,with no tube rupture events,and the costs was reduced by 58.3%compared with full-section replacement.This study provides technical support and a scalable solution for the remanufacturing of water-cooled walls in similar high-parameter boiler systems.
作者
杜鑫
DU Xin(Shanxi Jingneng Lulin Power Generation Co.,Ltd.,Lvliang 033200,China)
出处
《技术与市场》
2026年第1期163-166,共4页
Technology and Market
关键词
超临界循环流化床锅炉
水冷壁
修复工艺
耐磨层
supercritical CFB boiler
water-cooled wall
repair process
erosion-resistant coating
