流态化准数方程及最小流化速度的确定

气体力学参数的确定是流态化过程正常进行的前提,本文运用相似理论,从流化一类现象中固体颗粒和气体介质两方面的运动相似入手,用与前人不同的研究方法,导出了适用于全过程的流态化准数方程式,以此作为流化过程气体力学诸参数研究的统一基础。在此基础上,针对工业加热流化床的特点,通过实验建立了最小流化速度的实用计算式,由于考虑了固体颗粒与气体介质密度比这一影响因素,从而提高了计算精度,为流化床气体力学参数的确定提供设计依据。

On the Criterion Equation of Fluidization and Determination of Minimum Fluidizing Rate

Based on the movement similarity of solid particles to gaseous medium in fluidizing process,an attempt is made to develop a new criterion equation describing the relation between all the pneumatics parameters through fluidizing process, and further to provide an empirical equation to calculate the minimum fluidizing rate for practical use. Calculating accuracy is raised since the density ratio of solid particles to gaseous medium is taken into account. The investigation provides a design basis for determining the pneumatics parameters in fluidized-bed.