摘要
切圆燃烧锅炉不同配风方式对锅炉热效率和NO_(x)排放浓度的研究文献很多,但其对炉内整个燃烧区域高温腐蚀的影响特性的报道较少。以某660 MW超临界机组锅炉为研究对象,通过现场测试,研究了不同配风方式对NO_(x)排放浓度和炉膛水冷壁高温腐蚀的影响特性,并给予了炉内水冷壁高温腐蚀运行防控方面的指导。额定负荷运行工况下,建议AA托底风风门挡板开大,有利于控制冷渣斗区域水冷壁的高温腐蚀;开大周界风门挡板以及关小紧凑燃尽风(CCOFA)和分离燃尽风(SOFA)风门挡板,将缓解主燃烧器与燃尽风之间区域水冷壁、主燃烧器区域水冷壁和冷渣斗区域水冷壁的高温腐蚀,这将为同类型机组运行提供指导和借鉴。
There are many literatures on the influences of different air distribution modes on the thermal efficiency and NO_(x) emission concentration of tangentially fired boilers,but there are few reports on the high temperature corrosion characteristics of the whole combustion area in the boiler.Taking a 660 MW supercritical boiler as the research object,this paper studies the influences of different air distribution modes on NO_(x) emission concentration and high temperature corrosion of furnace water wall through field test,and provides guidance for the prevention and control of high temperature corrosion of furnace water wall.Under the rated load operation condition,it is suggested that the opening of AA bracket bottom air damper be larger,which is beneficial to controlling the high temperature corrosion of water wall in hopper area;the opening of perimeter air dampers and the closing of close-coupled overfire air(CCOFA)and separated overfire air(SOFA)dampers will alleviate the high temperature corrosion of water wall in the area between main burner and burnout air,main burner water wall area and hopper area.This will provide guidance and reference for the operation of similar units.
作者
项岱军
王煜伟
王小华
俞胜捷
丁奕文
XIANG Daijun;WANG Yuwei;WANG Xiaohua;YU Shengjie;DING Yiwen(National Energy Group Jiangsu Electric Power Co. , Ltd. , Nanjing 210036, China;Xi’an Thermal Power Research Institute Co. , Ltd. , Suzhou Branch, Suzhou 215153, China)
出处
《锅炉技术》
北大核心
2021年第4期8-11,42,共5页
Boiler Technology
关键词
切圆燃烧方式
配风方式
周界风
燃尽风
高温腐蚀
CO浓度
H_(2)S浓度
tangential combustion mode
air distribution mode
boundary air
over-fire air
high temperature corrosion
CO concentration
H_(2)S concentration
