摘要
以某1000 MW燃煤机组四角切圆燃烧方式锅炉为研究对象,针对其CD层燃烧器区域水冷壁局部高温腐蚀问题进行原因分析和开展燃烧优化调整。磨煤机粉管一次风速、煤粉细度和二次风配风方式不妥是造成该区域水冷壁高温腐蚀的主要原因。一次风速、煤粉细度、偏置二次风、油层辅助风、底层二次风对水冷壁局部高温腐蚀影响较大,影响量由大到小排序为偏置二次风、底层二次风、油层辅助风、一次风速和煤粉细度。经过优化运行调整,CD层水冷壁壁面CO浓度均低于30000μL/L,大部分低于20000μL/L,H2 S浓度均低于200μL/L,大部分低于100μL/L,大大降低水冷壁高温腐蚀风险。
Based on the four⁃corner cut round combustion boiler of a 1000 MW coal⁃fired unit,the causes are analyzed and the combustion optimization adjustment is conducted on the water cooling wall in the CD layer burner area.The im⁃proper primary wind speed,coal powder fineness and secondary air distribution mode of the coal mill are the main causes of the high temperature corrosion of the water cooling wall in this area.The primary wind speed,pulverized coal fineness,burner bias secondary wind,oil layer auxiliary wind and underlying secondary wind have a great impact on the local high temperature corrosion of the water wall,and the influence amount is ranked from large to small to biased secondary wind,underlying secondary wind,oil layer auxiliary wind,primary wind speed and pulverized coal fineness.After optimized op⁃eration adjustment,the CO concentration of water⁃wall of CD layer is lower than 30000μL/L,most less than 20000μL/L,H2 S concentration is lower than 200μL/L and most less than 100μL/L,greatly reducing the risk of high temperature cor⁃rosion of water wall.
作者
陈辉
韩林涛
黄林滨
夏斌
李朝兵
戴维葆
CHEN Hui;HAN Lin-tao;HUANG Lin-bin(National Energy Group Science And Technology Research Institute;Yantai Longyuan Power Technology Co.,Ltd.)
出处
《电站系统工程》
2023年第5期17-20,23,共5页
Power System Engineering
关键词
燃煤机组
水冷壁
高温腐蚀
优化调整
coal⁃fired units
water⁃cooled wall
high temperature corrosion
optimization adjustment
