摘要
为了控制循环流化床锅炉燃烧过程中NO_(x)的生成,针对240 t/h循环流化床锅炉,建立了包含NO_(x)和SO_(2)的数值模型,使用CFD研究了流化床内的颗粒运动、组分分布以及化学反应速率对NO_(x)生成的影响,获得了不同负荷条件下炉膛出口处的NO_(x)浓度。结果表明:额定负荷条件下,NO_(x)的浓度最高,分别是70%负荷的1.22倍,是50%负荷的1.87倍,考虑到燃烧效率,建议锅炉运行应在70%~80%额定负荷。
To control the formation of NO_(x) in the combustion process of the circulating fluidized bed boiler,a numerical model including NO_(x) and SO_(2) is established for the 240t/h circulating fluidized bed boiler,and the particle movement in the fluidized bed is studied by means of numerical simulation,composition distribution and the effect of chemical reaction rate on NO_(x) generation,the NO_(x) concentration at the furnace outlet under different load conditions was obtained.The results show that under the rated load condition,the NO_(x) concentration is the highest,which is 1.22 times of the 70% load and 1.87 times of the 50% load respectively.Considering the combustion efficiency,it is recommended that the boiler should operate at 70%-80% of the rated load.
作者
冷雪
胡彦伟
LENG Xue;HU Yan-wei(Shaanxi Institute of Special Equipment Inspection and Testing;Harbin Institute of Technology)
出处
《电站系统工程》
2024年第3期45-48,51,共5页
Power System Engineering
基金
国家重点研发计划项目(2018YFF0216000)资助。
关键词
氮氧化物生成
循环流化床
不同负荷
组分分布
NO_(x)formation
circulating fluidized bed
different loads
component distribution
