某电厂锅炉高温过热器爆管分析  

Analysis on Tube Burst of High Temperature Superheater in a Power Plant Boiler

作　　者：宋理彬 SONG Libin(Guoneng Shenwan Chizhou Power Co.,Ltd.,Chizhou 247100,Anhui Province,China)

机构地区：[1]国能神皖池州发电有限责任公司,安徽池州247100

出　　处：《发电设备》2025年第1期35-39,共5页Power Equipment

摘　　要：某电厂锅炉高温过热器在运行中发生爆管,为避免类似事件的发生,运用合金分析仪、布氏硬度计、金相显微镜及扫描电子显微镜(SEM)等仪器进行了宏观检验、合金成分分析、硬度测试、金相检验及能谱分析等来探究爆管原因.结果表明:本次爆管原因是管内壁附着较厚的腐蚀产物,引起通流面积减小,传热恶化,炉管在长期超温工况下服役.针对该问题,电厂应加强锅炉受热面管基建安装过程管理,通过做好管口封堵,以及加强运行中壁温监视等措施,提高锅炉运行可靠性.For a tube burst accident occurred at a high temperature superheater in a power plant boiler,to avoid the similar accidents,the reason of tube burst was investigated from the aspects of macroscopic inspection,alloy composition analysis,hardness test,metallographic inspection,and energy spectrum analysis through using alloy analyzer,Brinell hardness tester,metallographic microscope,and scanning electron microscope(SEM).Results show that,the reason of the tube burst is the thick corrosion products attached to the inner wall of the tube,which leads to the decrease of flow area and the deterioration of heat transfer with the long time over temperature service of boiler tube.In response to this issue,it is necessary to strengthen the management of the construction and installation process of boiler heating surface tubes in power plants.Measures such as sealing the tube leak and strengthening the wall temperature monitoring during operation should be adopted,thereby improving the reliability of boiler operation.

关 键 词：锅炉 高温过热器 爆管 长期超温 

分 类 号：TK228[动力工程及工程热物理—动力机械及工程]