To control the formation of NOx in the combustion process of the circulating fluidized bed boiler,a numerical model including NOx and SO2 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 NOx generation,the NOx concentration at the furnace outlet under different load conditions was obtained.The re-sults show that under the rated load condition,the NOx 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.
关键词
氮氧化物生成/循环流化床/不同负荷/组分分布
Key words
NOx formation/circulating fluidized bed/different loads/component distribution
万方数据