摘要
为解决超超临界二次再热塔式锅炉主蒸汽和一、二次再热蒸汽温度低,飞灰含碳量高等问题,以某1000 MW超超临界二次再热塔式锅炉为例进行试验研究,结果表明:磨煤机组合和运行O_(2)是影响蒸汽温度的重要因素;烟气再循环可有效提高蒸汽温度,但烟气再循环量过大,易造成着火不稳;通过调整燃烧器热负荷均匀性、燃尽风配风、烟气挡板、煤粉细度、吹灰等优化手段,降低了飞灰含碳量,提高了主蒸汽和一、二次再热蒸汽温度和锅炉效率,有利于机组运行的安全性和经济性。
In order to solve the problems of low main steam and primary and secondary reheat steam temperatures and high carbon content in fly ash of ultra supercritical secondary reheat tower boilers,a field test study was conducted on a 1000 MW ultra supercritical secondary reheat tower boiler.The test results show that the combination of coal mills and the concentration of O_(2) are important factors that affect the temperature of steam.Flue gas recycle can effectively improve the temperature of steam.Excessive flue gas recycle can easily lead to unstable ignition of pulverized coal.In addition,optimizing combustion and adjustment through uniform burner thermal load,exhaust air distribution,flue gas damper,pulverized coal fineness,soot blowing,etc.can reduce the carbon content of fly ash,improve the temperature of main steam,primary and secondary reheat steam,and boiler efficiency,and improve the safety and economy of unit operation.
作者
王俊洋
巩时尚
王飞
李韩亮
WANG Junyang;GONG Shishang;WANG Fei;LI Hanliang(Energy China Northwest Electric Power Test Research Institute Co.,Ltd.,Xi'an 710032,China)
出处
《电力勘测设计》
2024年第3期34-40,共7页
Electric Power Survey & Design
关键词
二次再热
塔式锅炉
蒸汽温度
烟气再循环
锅炉效率
double reheat
tower-type boiler
steam temperature
flue gas recycle
boiler efficiency
