浅谈660MW机组快速冷却汽轮机技术应用  

Discussion on the application of 660MW Unit fast cooling steam turbine technology

作　　者：万华 张磊 刘书元 WAN Hua;ZHANG Lei;LIU Shu-yuan

机构地区：[1]国电湖南宝庆煤电有限公司发电运行部,湖南邵阳422000

出　　处：《节能》2020年第8期20-22,共3页Energy Conservation

摘　　要：汽轮机运行期间,若出现主机轴承损坏,需要进行停机处理,汽轮机从打闸停机到调节级金属温度下降至停运主机润滑油系统所需时间在1周以上,时间较长,不能满足电网需求,有时因检修工期较长,导致机组延期并网还会受到电网考核。国电宝庆电厂机组为国产660 MW超临界机组,#2汽轮机运行期间,因#6、#7轴承处存在漏油,为了使检修工作能尽早开工,尽量缩短检修工期,需对汽轮机高、中压缸内部快速冷却。通过研究、实践,利用锅炉余热快速冷却汽轮机高、中压缸内部策略,大大缩短了机组停运检修工期,对其他同类型汽轮机具有一定的参考。During the operation of the steam turbine, if the main engine bearing is damaged, it needs to be shut down. The time required for the steam turbine to shut down from the brakes to the shutdown of the regulating metal temperature to the shutdown of the main engine lubricating oil system is more than one week, which is a long time and cannot meet the needs of the power grid. Sometimes due to the long maintenance period, the grid connection of the unit is delayed and will be assessed by the grid. The Unit of Baoqing Power Plant of Guodian is a domestically produced 660 MW supercritical unit.During the operation of the #2 steam turbine, there is oil leakage at the #6 and #7 bearings. In order to start the maintenance work as soon as possible and shorten the maintenance period,the high and medium cylinder of the cools quickly. Through research and practice, this paper explores the strategy of using boiler waste heat to quickly cool the internal pressure of steam turbine high and medium pressure cylinders, greatly shortening the maintenance period of the unit, and has a certain reference to other steam turbines of the same type.

关 键 词：汽轮机 调节级出口金属温度 余热快冷 滑参数停机 

分 类 号：F407.61[经济管理—产业经济]