以颗粒絮团更新理论为基础，建立了一个循环流化床床层与壁面间传热特性的预测模型．模型主要由流动和传热两个部分组成．在流动部分中，计算了床层的径向和轴向空隙率分布，颗粒絮团的最大下落速度以及颗粒絮团在壁面的滞留时间；在传热部分中，则将总传热系数分为颗粒对流、颗粒辐射、分散相对流以及分散相辐射四个分量进行叠加．与有关工业锅炉实测结果的对比表明，该模型是有效的 Based on the particle floc renewal theory, a predictive model of heat transfer between the bed and the wall of a circulating fluidized bed was established. The model consists of two parts, flow and heat transfer. In the flow section, the radial and axial voidage distributions of the bed, the maximum falling velocity of the particle flocs and the residence time of the particle flocs on the wall surface were calculated. In the heat transfer part, the total heat transfer coefficient Particle convection, particle radiation, dispersed relative flow and scattered phase radiation four components superimposed. The comparison with the measured results of industrial boilers shows that the model is effective