间歇结晶过程中几种可能的粒度分布  

Several possible crystal size distributions for batch crystallization processes

作　　者：刘勇[1] 王静康[1] 

机构地区：[1]天津大学化工学院,天津300072

出　　处：《化工学报》2005年第2期276-280,共5页CIESC Journal

摘　　要：对间歇溶液结晶过程, 依据粒数衡算方程, 在忽略二次过程如聚集、破碎和老化等且混合良好情况的假设下, 采用分离变量方法对粒度相关生长或生长分散的粒度分布进行理论分析, 推导出间歇结晶过程中的几个粒数密度与结晶时间和晶体粒度的关系式. 这些关系式可以用于间歇结晶过程中, 选择合适的晶体生长机理与测定线性晶体生长速率, 预测粒度分布与优化结晶过程, 以及回归粒度分布. 结果表明, 本方法在溶液结晶过程中具有良好的应用价值.Theoretical analysis of crystal size distribution was made for size dependent or dispersed crystal growth under the assumption of perfect mixing and neglecting secondary processes such as agglomeration, breakage and ageing. Several relations between population density, crystallization time and crystal size for the batch solution crystallization process were obtained with the method of separating variables based on the population balance equation. These relations could be used to select the mechanism of crystal growth and calculate the linear crystal growth rate, predict the crystal size distribution and optimize the crystallization process, and regress the crystal size distribution. The results showed that this method could be used in solution crystallization process.

关 键 词：间歇结晶 粒数衡算方程 粒度分布 

分 类 号：TQ026.5[化学工程]