摘要
要实现工业结晶过程新工艺和设备的开发以及过程操作的优化,就必须建立涉及结晶过程特性并反映结晶器流动、混合和传递规律及其相互作用关系的结晶器总体数学模型。过去几十年中已有许多研究者进行了这方面的探索,提出了各种各样的模型。特别是70年代初由Randolph和Larson提出的粒数衡算模型,将产品的粒度分布与结晶器的结构参数和操作参数联系起来,成为结晶器设计、放大和优化从经验上升到科学的重要标志。 针对不同结晶系统提出的多种数学模型中。
Based on the population balance theory, a partial mixing series model, which integrates the kinetics of crystal growth with the hydrodynamics of characterization of the geometric properties and operating parameters of the device, was developed to describe the behaviour of three - phase fluidized bed crystallizer. With this model, the concentration distribution of the solution, size distribution of the crystals and the mean size of the products were estimated. The calculated results agreed well with the experimental data for sucrose crystallization in a three - phase fluidized bed. The fact indicates that the model is quite reasonable, practical and capable of providing a basis for the design and scale up of three - phase crystallization systems.
出处
《化工学报》
EI
CAS
CSCD
北大核心
1997年第6期751-755,共5页
CIESC Journal
基金
国家自然科学基金(No.59576042)
及华南理工大学科学基金
关键词
三相流化床
结晶
流体动力学
数学模型
three - phase fluidized bed, crystallization, mixing, hydrodynamics, mathematical model
