多组分多出口稀土串级萃取静态优化设计研究(I)静态设计算法

研究了多组分、多出口稀土串级萃取体系静态优化设计过程的精确计算方法. 首先推导出串级萃取体系最重要的物料平衡和萃取平衡关系, 其次根据分离要求等条件确定了各出口的相对流量, 利用萃取平衡和物料平衡关系进行静态递推, 并在求解过程中根据物料平衡关系引入了校正参数, 通过对递推结果的迭代校正, 最终得到收敛的计算结果, 解决了静态设计算法的关键问题. 这一方法为多组分多出口稀土串级萃取过程的静态优化设计提供了精确算法.

Static Design for Multiple Components and Multiple Outlets Rare Earth Countercurrent Extraction (I):Algorithm of Static Design

Static design of multi-component and multi-outlet rare earth extraction system was presented, in which a novel algorithm was developed. First, the relative flow rate of each outlet was calculated from the purification indexes, then the mass balance and extraction equilibrium of countercurrent extraction were studied. Furthermore, the recursion in the separation system was operated through these relationships. The key point of the algorithm is to introduce a specific variable for adjusting recursion results continuously. Once all corresponding parameters were adjusted properly, the system was approaching balance through iterations step by step. Finally, series parameters such as stage numbers were optimized. The accurate static design algorithm for multi-component and multi-outlet rare earth countercurrent extraction investigated here is valuable to the countercurrent extraction theory and its applications.