【摘要】 研究了稳定状态下异重流化床中颗粒沿床高的浓度分布规律。引入了中间混合指数及相对分布浓度的概念，提出了概率分布模型，表明颗粒沿床高的浓度分布是符合指数分布的。根据试验结果，回归出模型参数与颗粒物性相对密度、相对粒度的关系。计算结果与试验数据吻合得很好。同时根据中间混合指数的值，将流化床内颗粒的混合状态分成五个区：完全上浮区，上浮区，混和均匀区，下沉区和完全下沉区。研究结果具有重要的理论与实际意义更多还原

【Abstract】 In this paper,mass distribution of fuel particles in the Binary Fluidised Bed(BFB) consisting of materials of different density and size is discussed.Middle mixing index(MI) and relative concentration are introduced,a probability distribution model has been developed. The vertical distribution of fuel is in conformity with exponential function.Combining with the experimental results,model parameters can be regressed by relative density and relative size.The numerical results are in good agreement with the experimental data.According to the value of MI,five mixing relations between particles in BFB are got.The results are significant practically and theoret cally.更多还原