以d4.5m×90m熟料窑的喷射干燥段为研究对象,建立了三维传热、传质数学模型.应用数值方法,研究了不同窑尾压力和料浆粒径时,窑内温度分布和水蒸气的浓度分布,并对操作参数和工艺参数进行了优化.结果表明:窑尾负压和生料浆的平均粒径对窑内温度分布和水蒸汽浓度分布有较大影响;需要提高窑尾温度和窑尾烘干能力时可提高负压,反之则减小负压;减小料浆粒径,有利于降低窑尾烟气温度,加快物料的升温过程;对直径为4.5m左右的大型回转窑,窑尾负压可根据窑况在-200～-300Pa之间调节,生料浆的平均粒径不宜大于0.1mm.
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