串级萃取理论之联动萃取分离工艺设计:Ⅵ、理论的应用拓展

Countercurrent Extraction Theory: Process Design of Hyperlink Extraction Separation Ⅵ: Extensive Applications of the Theory

本系列文章的前五篇推导得到了用于多组分联动萃取分离流程设计的基础理论,并通过一个四组分分离流程实例介绍了该设计理论的实际应用。本文是本系列文章的最后一篇,将探讨该理论的拓展应用。所有非联动萃取多组分分离流程都可以通过适当等效变换,转换为由联动萃取流程中基本分离单元组合得到的等效流程,本文通过任意切割比例的三组分两出口分离、三组分三出口分离以及三组分联动萃取全分离等效流程等不同工艺形式实例,介绍如何通过流程的等效变换,应用本系列文章中的理论公式解决稀土工业实践中不同类型工艺流程的参数计算问题。

The previous five articles of the series have introduced the theory for flowsheet design of multi-component hyperlink extraction separations as well as its application in a design case of 4-component separation flowsheet. The present article which is the end of the series will focus on extensive applications of the theory. In view of the different kinds of non-hyperlink flowsheets traditionally used, theoretically each of them can be transferred to a flowsheet of the combination of a number of basic separation units with hyperlink characteristics, by means of equivalent transformation. The article, therefore, will introduce how to calculate the parameters of different kinds of flowsheets in rare earth separation industry with the use of the equations presented in the series by the cases of three-component two-outlet separation at any desired partition, three-component three-outlet separation, and an equivalent flowsheet of three-component hyperlink separation flowsheet through equivalent transformation.