在一总高６５０ｍｍ，直径６０ｍｍ的三相流化床实验装置上，分别采用压降法和取样法测定了不同操作条件下二元混合物蔗糖晶体颗粒浓度沿轴向的分布，并建立了表征颗粒混合与分级程度的数学模型，得到不同条件下的混合系数。结果表明，混合系数即混合程度随气速增加而增大，但随液速增加略有减小；随大颗粒比率的增加，床中的离集程度有所增大。 In a three-phase fluidized bed experimental apparatus with a total height of 650mm and a diameter of 60mm, the pressure drop and sampling methods were used to determine the axial distribution of the sucrose crystal particle concentration of the binary mixture under different operating conditions and the characterization of the particles Mixing and grading of the mathematical model, get the mixing coefficient under different conditions. The results showed that the mixing coefficient, ie, the degree of mixing, increased with increasing gas velocity, but decreased slightly with the increase of liquid velocity. With the increase of the ratio of large particles, the degree of separation in the bed increased.