抽凝机组凝汽器真空问题分析与处理  

Analysis and treatment of vacuum problem in condenser of extraction condensing steamturbine

作　　者：朱一鹏 祝相云 胡君友 ZHU Yipeng;ZHU Xiangyun;HU Junyou(Zhejiang Zheneng Zhenhai Power Generation Co.,Ltd,Ningbo 315208,China;Zhejiang Energy Group Research Institute Co.,Ltd.,Hangzhou 311121,China;Zhejiang Zheneng Electric Power Co.,Ltd.,Hangzhou 310063,China)

机构地区：[1]浙江浙能镇海发电有限责任公司,浙江宁波315208 [2]浙江浙能技术研究院有限公司,浙江杭州311121 [3]浙江浙能电力股份有限公司,浙江杭州310007

出　　处：《能源工程》2023年第6期99-103,共5页Energy Engineering

摘　　要：针对LNC/N115-9.88/539/1.9抽凝汽轮机存在的凝汽器真空低及真空严密性差问题进行了分析研究,发现凝汽器总换热系数偏小、真空系统泄漏是主要原因,通过对汽轮机采取凝汽器钛管高压冲洗、增装强化换热装置、真空系统查漏、高低压轴封管路分离改造、汽缸密封面处理以及低压轴封间隙调整等一系列措施,使得该机组的真空问题得到解决,为同类问题的分析和处理提供了参考。Problems of insufficient condenser vacuum and poor vacuum tightness occurred in LNC/N115-9.88/539/1.9 extraction condensing steam turbine were studied.Results indicated that the degradation of heat transfer in condenser and leakage in vacuum system resulted in the above vacuum problem.The vacuum problem has been solved after a series of measures being adopted,such as cleaning the titanium tube of condenser by high pressure washing,installing enhanced heat exchange device and vacuum leak detection system,the separation renovation for high and low pressure shaft seal pipelines,steam turbine cylinder sealing surface treatment and low-pressure shaft seal clearance adjustment.The troubleshooting provides reference for the analysis and treatment of similar problems.

关 键 词：抽汽凝汽式 汽轮机 凝汽器 真空 

分 类 号：TK26[动力工程及工程热物理—动力机械及工程]