630 MW超临界锅炉启动初期给水流量控制的探索  

Exploration on feed water flow control at initial stage of startup of a 600 MW supercritical boiler

作　　者：王小军 WANG Xiaojun(China Huadian Group Guigang Power Generation Company Limited,Guigang 537138,China)

机构地区：[1]中国华电集团贵港发电有限公司,广西贵港537138

出　　处：《华电技术》2019年第4期74-75,80,共3页HUADIAN TECHNOLOGY

摘　　要：某发电公司在机组启动初期(机组并网前),需平稳控制锅炉受热面的温升,保证锅炉过热器壁温可控、过热汽温不超温。锅炉过热器温升变化较大或超温会造成氧化皮大面积地脱落,可能导致启动1周内锅炉过热器管因氧化皮的脱落而超温爆管。退出锅炉给水流量低保护、将锅炉给水流量控制在350～574 t/h之间,可有效地解决上述爆管问题。At initial stage of boiler startup (before grid connecting),the temperature rise of boiler heating surface has to be controlled,the superheater surface temperature has to be controllable, and superheat steam temperature should be controlled.Large piece of oxide scale will fall off because of large variation of superheater temperature or overtemperature.The fallen oxide scale will block the superheater within one week after the boiler startup,which could cause overtemperature and tube burst.Disengaging the boiler feed water low-flow protection and controlling the feed water flow between 350~574 t/h can effectively solve the problem of frequent burst pipe in boilers.

关 键 词：超临界锅炉 启动初期 给水流量 过热器超温爆管 氧化皮 

分 类 号：TK227[动力工程及工程热物理—动力机械及工程]