基于CFD的城市生活垃圾焚烧炉燃烧优化

基于CFD，对城市生活垃圾焚烧炉进行了燃烧优化调整。采用扩散的床层模型和组分运输模型对垃圾在焚烧炉内的燃烧过程进行了数值模拟计算。在保持一、二次风比例不变的情况下，调整一次风的各级给风率，计算出各种燃烧条件下床层上方的炉膛烟气组分和温度分布。计算结果表明：一次风各级给风率的变化对垃圾焚烧炉内的气相燃烧及流场产生了较大的影响，热解燃烧段应采用均等配风；当一次风各级比例为1:3:3:2:1的时候，主炉膛出口CO浓度最小，平均浓度为0.159g/m3。

COMBUSTION OPTIMIZATION FOR MSW INCINERATOR BASED ON CFD

Combustion Optimization for municipal solid waste(MSW) incineration was performed with the support of CFD. A diffusion model for packed bed and species transport equations were applied in the simulation of MSW incineration .the simulation results illustrate the furnace gas components and temperature over bed top under different conditions when the ratio of primary air is consent. The study shows that there are strong connection between gas combustion、flow field and the ratio which has greatly influenced the gas combustion and flow field .During the pyrolysis and combustion stage, the ratio should be invariable. When the ratio is 1:3:3:2:1, CO emission concentration is the minimum and the average content is 0.159g/m3.