炉排-循环床复合垃圾焚烧炉燃烧过程模型

Model for waste combustion in a grate-CFB

建立了炉排-循环床复合垃圾焚烧炉的燃烧过程半经验数学模型,包括物料分布、挥发分释放、碳颗粒燃烧等模型。用该模型对实际运行的垃圾焚烧炉进行计算。炉膛内压力分布、物料浓度分布的计算结果与工业测试数据的一致性较好,而实际测得的O2、CO2、CO的浓度也处于设计过量空气系数(α=1.6)和较低过量空气系数(α=1.3)条件下的模型计算值之间的范围。模型中部分参数需根据试验或工业数据确定,该模型可用于指导该类焚烧炉的设计。

Municipal solid waste （MSW） combustion in a grate-CFB （circulating fluidized bed） incinerator was numerically analyzed using a semi-empirical model which includes a bed material distribution model, a volatiles release model, and a carbon particles combustion model. The calculated pressure and axial particle distributions in the furnace agree well with industrial test data, with the measured CO,O2, and CO2 concentrations varying in the range of calculated concentrations at the design excess air rate of 1.6 and minimal excess air rate of 1.3. The model can be used to analyze combustion in an MSW incinerator with empirical parameters in the model determined from experimental or industrial tests.