海外某电厂低压加热器换热管泄漏原因分析  

Leakage Analysis of Heat Exchange Tube of Low Pressure Heater in an Overseas Power Plant

作　　者：季益山 程锦 Ji Yishan;Cheng Jin(Shanghai Electric Power Generation Equipment Co.,Ltd.Shanghai Power Station Auxiliary Equipment Plant,Shanghai 200090,China)

机构地区：[1]上海电气电站设备有限公司上海电站辅机厂,上海200090

出　　处：《电站辅机》2023年第4期39-44,共6页Power Station Auxiliary Equipment

摘　　要：通过对低压加热器换热管断口位置和泄漏位置进行失效分析,结合低压加热器历史运行参数进行数据分析、危急疏水阀长期保持较高开度甚至全开状态、管束在不同工况运行状态下振动的校核,得出低压加热器换热管失效原因为长期无水位运行产生卡门漩涡脱落引起管束振动,致使换热管失效,失效形式多为断裂、裂纹。Through the analysis of the fracture and failure position of the heat exchange tube of the low-pressure heater,combined with the analysis of the historical operation parameters of the low-pressure heater and the vortex shedding vibration check,the failure of the heat exchange tube of the low-pressure heater is the vibration of the tube bundle caused by the long-term operation without water level.

关 键 词：加热器 换热管 失效 水位 振动 旋涡脱落 

分 类 号：TM621[电气工程—电力系统及自动化]