Improvements on Dynamic Combustion Model of Dense-phase Zone in Circulating Fluidized Bed Boiler Furnace
YAN Weiping1, YIN Libao1, YU Xining1, PENG Bo2(1North China Electric Power University,Baoding 071003, China; 2Hebei Electric Power Research Institute, Shijazhuang 050021,China)
A novel method for predicting the dynamic combustion performances of densephase zone in CFB furnace are proposed based on the improvements on the previous models. The coal particle heating process, the time delay and the subsequent heat release as raw coal with wide size distribution admitted into the furnace are adequately taken into account in the proposed model. The bed temperature responses to the variations of coal firing rates are predicted and compared to the measured data from a 220t/h CFB boiler.