摘要
以世界首台600 MW超临界循环流化床(CFB)锅炉为研究对象,以烟气组分分布特性为判据,进行二次风射流特性和颗粒横向扩散特性的热态实炉测试,并利用二维扩散模型预测了截面煤颗粒质量浓度分布。结果表明:各负荷下外侧墙二次风的射流深度在3~4 m且横向扩散较弱,煤颗粒的横向扩散系数约为0.24 m^(2)/s;当给煤注入炉膛15 s后,床层煤颗粒质量浓度分布的均匀性明显提升。
Taking the distribution characteristics of flue gas components as the criterion, thermal field tests on the characteristics of secondary air(SA) penetration and coal particle lateral dispersion were conducted on the first 600 MW supercritical circulating fluidized bed(CFB) boiler in the world. Combined with 2 D dispersion model, the mass concentration distribution of coal particles in the cross-section was predicted. Results show that the penetration depth of SA on the outer side wall is 3-4 m and the lateral dispersion is weaker. The lateral dispersion coefficient of coal particles is about 0.24 m^(2)/s. When the coal is injected into the furnace for 15 s, the uniformity of coal particle distribution in the bed can be significantly improved.
作者
严谨
卢啸风
郑雄
薛锐
崔晓波
雷秀坚
YAN Jin;LU Xiaofeng;ZHENG Xiong;XUE Rui;CUI Xiaobo;LEI Xiujian(College of Energy and Power Engineering,Nanjing Institute of Technology,Nanjing 211167,China;Key Laboratory of Low-Grade Energy Utilization Technologies&Systems,MOE,Chongqing University,Chongqing 400044,China;Sichuan Baima CFB Demonstration Power Plant Co.,Ltd.,Neijiang 641005,Sichuan Province,China)
出处
《动力工程学报》
CAS
CSCD
北大核心
2021年第7期525-532,共8页
Journal of Chinese Society of Power Engineering
基金
国家重大研发计划资助项目(2016YFB0600201)
南京工程学院高层次人才引进科研启动基金资助项目(YKJ201962)
南京工程学院校级科研基金资助项目(ZKJ201605)。
关键词
CFB锅炉
给煤
扩散
射流
CFB boiler
feeding coal
dispersion
jet penetration
