摘要
汽轮机打闸后需要盘车运行一段时间,如果盘车运行时间长将使检修工期延长,同时也会增加相关系统运行成本.为缩短检修工期,并兼顾节能降耗,在机组停运后一般均采用汽轮机快速冷却(简称“快冷”)方式来加速内部部件冷却速率,减少盘车运行时间.从汽轮机打闸到盘车停运,在自然冷却情况下,需要12~15天;采取快速冷却方式后,耗时一般少于5天,因此可至少提前1周停运盘车.根据西门子1 000MW汽轮机典型快冷案例,对汽轮机快冷操作流程及过程中存在的问题进行阐述和分析,总结了具有一定参考价值的操作流程及控制手段。
Generally, some certain time of turning gear is needed after a steam turbine shutdown. However, long-tinle turning gear will definitely extend the overhaul period and increase the operating costs of the related oil system. For the purpose of shortening the repairing period and conserving energy, fast cooling is adopted to accelerate the cooling rate of the internal components and reduce the turning gear period after the turbo set outages. Under natural cooling conditions, it takes about 12 to 15 days from turbine tripping to turning gear being switched off; but when fast cooling is adopted, it takes less than 5 days, saving 7 days at least. Regarding the typical fast cooling cases of Siemens 1 000-MW steam turbine, this paper presents the fast cooling operating procedures and analyzes some existing problems, and finally summarizes the procedure and controls for reference.
出处
《中国电力》
CSCD
北大核心
2015年第11期7-12,共6页
Electric Power