摘要
为提高热电机组的运行灵活性和供热能力,以某135 MW机组新型凝抽背供热改造为例,针对切除低压缸进汽后引发的鼓风超温、叶片水蚀及叶片颤振断裂等进行了理论分析并提出了相应措施。结合改造后运行数据证实国产热电机组实施新型凝抽背供热改造技术是可行的。
To improve the operation flexibility and heating capacity of thermoelectric units,a 135 MW unit was retrofitted by new extraction condensing back-pressure(NCB)heating technology,during which,the potential hazards were theoretically analyzed,such as the windage overheating,the water erosion of blades and the flutter fracture after cutting the steam input of low-pressure cylinder,etc.,and subsequently corresponding countermeasures were proposed.Retrofit results prove the new NCB heating technology to be applicable to domestic thermoelectric units.
作者
刘帅
夏明
郑立军
俞聪
刘国弼
汪晓龙
曾军
王隆
Liu Shuai;Xia Ming;Zheng Lijun;Yu Cong;Liu Guobi;Wang Xiaolong;Zeng Jun;Wang Long(Huadian Electric Power Research Institute Co., Ltd., Hangzhou 310030, China;Xinjiang Huadian Hami Thermoelectric Co., Ltd., Hami 839000, Xinjiang UygurAutonomous Region, China)
出处
《发电设备》
2020年第6期417-421,共5页
Power Equipment
基金
中国华电集团有限公司科技项目(CHDKJ18-02-68)。
关键词
热电机组
凝抽背技术
低压缸
切缸
冷却蒸汽
thermoelectric unit
NCB technology
low pressure cylinder
cutting of cylinder
cooling steam
