摘要
借助数值模拟方法对四角切圆煤粉锅炉进行三维稳态数值模拟,观察其炉内燃烧过程,重点对比了在空气分级下不同配风方式对炉内空气流动和燃烧特性的影响。结果表明:底部配风量较多的正宝塔型、均等、缩腰型配风在炉膛底部形成较高切圆且温度较高,主燃区上部风量较小的正宝塔型和鼓腰型配风速度分布均匀,温度偏差较小,倒宝塔型和鼓腰型配风时出口NO x较其他3种配风方式要小。
A three-dimensional steady-state numerical simulation of a four-cornered round pulverized coal boiler with a numerical simulation method was performed to observe the combustion process in the furnace.The effects of different secondary air distribution methods on air flow and combustion characteristics in the furnace under air classification were compared.The results show that:the positive pagoda with a large air volume distribution at the bottom,the equal and reduced waist air distribution form a higher tangent circle at the bottom of the furnace and the temperature is higher,and the positive pagoda with a smaller air volume at the upper part of the main combustion zone has a uniform air velocity distribution.The temperature deviation is small,and the NO x at the outlet of the pagoda and drum waist is smaller than the other three.
作者
杜威
丁红蕾
潘卫国
郭得通
周柒
郭士义
丁承刚
邓云天
DU Wei;DING Honglei;PAN Weiguo;GUO Detong;ZHOU Qi;GUO Shiyi;DING Chengang;DENG Yuntian(Shanghai University of Electric Power,Shanghai 200090,China;Shanghai Electric Power Station Environmental Protection Engineering Co.,Ltd.,Shanghai 201600,China;Shanghai Environmental Protection Engineering Technology Research Center,Shanghai 200090,China)
出处
《上海电力大学学报》
CAS
2021年第4期361-366,共6页
Journal of Shanghai University of Electric Power
基金
国家重点研发计划(2018YFB0604204,2016YFC0203704)。
关键词
四角切圆锅炉
配风方式
空气分级
燃烧
数值模拟
tangential round boiler
air distribution
air staging
combustion
numerical simulation