Modeling the Growth Kinetics of Fluidized‐Bed Spray Granulation
Modeling the Growth Kinetics of Fluidized‐Bed Spray Granulation
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DOI：
10.1002/ceat.201100046
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发表时间：
2011-07
影响因子：
2.1
通讯作者：
Zhen Li;M. Kind;Gerald Gruenewald
中科院分区：
文献类型：
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作者：
Zhen Li;M. Kind;Gerald Gruenewald
流化床喷雾造粒用于从悬浮液、溶液和熔体生产多孔颗粒。在这项工作中，适应双流体模型的方法被用来模拟流化床中的流体动力学，并采用简化的直接矩量法来模拟完整的颗粒尺寸分布。通过对颗粒上的液滴沉积进行建模，通过计算流体动力学模拟在短处理时间内获得与尺寸相关的生长动力学。该动力学用于群体平衡方程中，以预测长处理时间的全粒度分布的演变。这种多尺度方法允许描述连续造粒过程。
Fluidized-bed spray granulation is used to produce porous granular particles from suspensions, solutions, and melts. In this work, the adapted two-fluid model approach is used to simulate the fluid dynamics in the fluidized bed, and a simplified direct quadrature method of moments is adopted to mimic the full particle size distribution. The size-dependent growth kinetics is obtained by computational fluid dynamics simulation for short process times from the modeling of drop deposition on the particles. This kinetics is used in the population balance equation to predict the evolution of the full particle size distribution for long process times. Such a multiscale approach allows for a description of continuous granulation processes.