锅炉冷灰斗水冷壁弯管裂纹缺陷的分析处理

Analysis and treatment for crack defects in bending waterwall tube of cold ash hopper

火电厂锅炉"四管"爆破事故是引起机组非计划停运的主要原因,预防和消除"四管"缺陷对于电力安全生产十分重要.详细描述开封火电厂2×600 MW机组锅炉冷灰斗水冷壁弯管缺陷的发现、检测、分析及处理,为火电建设工程中锅炉设备制造、监造和验收等提供可借鉴的经验.

The main reasons of generation units unplanned outage are the blasting accidents of four boiler tubes （including waterwall tube, economizer tube, superheater tube, reheater tube）. The eliminations and preventions of boiler tube defects are very important work for power system security. This paper describes the discovering, detecting, analyzing and treating process for bending watel-wall tubes crack defects of cold ash hopper in the Kaifeng power plant 2×600 MW units. It provides reference experiences for boiler manufacturing, supervising and checking in thermal power plant eonstruction projects.