超超临界1 050 MW机组中压缸超温原因分析与处理  

Analysis and Treatment of the Causes of Over Temperature in the Intermediate Pressure Cylinder of an Ultra Supercritical 1050 MW Unit

作　　者：黄鹤林 HUANG Helin

机构地区：[1]国能重庆万州电力有限责任公司,重庆404027

出　　处：《电力系统装备》2024年第5期102-104,共3页Electric Power System Equipment

摘　　要：文章介绍了超超临界1050MW机组中压缸进汽室超温情况,以及发电厂利用机组A级检修机会,对中压缸解体检修,发现内缸、隔板套、隔板多处变形,通流部件有碰磨痕迹,随后将第1级隔板返厂增加切向旋流冷却孔,对隔板套、隔板等进行加工,对通流间隙进行调整。机组检修结束启动后,中压缸超温问题顺利解决,中压缸效率也得到恢复。This article introduces the situation of over temperature in the inlet chamber of the intermediate pressure cylinder of the ultra supercritical 1050 MW unit,and provides a detailed introduction to the power plant’s use of the A-level maintenance opportunity to disassemble and inspect the intermediate pressure cylinder.It was found that the inner cylinder,baffle sleeve,and baffle were deformed in multiple places,and there were signs of collision and wear on the flow components.Subsequently,the first stage baffle was returned to the factory to add tangential swirl cooling holes,and the baffle sleeve and baffle were processed,and the flow clearance was adjusted.After the maintenance of the unit was completed and started,the problem of overheating of the intermediate pressure cylinder was effectively solved,and the efficiency of the intermediate pressure cylinder was also restored.

关 键 词：中压缸 超温 变形 通流间隙 调整 

分 类 号：TM621[电气工程—电力系统及自动化]