Modeling and control of a sugars precipitation process for Chinese medicine mixed solution

This paper illustrates the benefits of a multivariable control approach applied to a sugar precipitation process for Chinese medicine mixed solution. This relevant approach proposes setpoints tracking for the crystal mass/concentration couple. In this purpose, a model dedicated to the stage precipitation is designed, without consideration of crystal size distribution. The performance of the proposed control strategy, which application to sucrose and glucose precipitation constitutes a real novelty, is tested via simulation. The good performance in setpoints tracking allows to consider a significant improvement of the precipitation productivity.