Component content distribution profile control in rare earth countercurrent extraction process  

稀土萃取过程组分含量分布控制方法(英文)

作　　者：杨辉 徐芳萍 陆荣秀 丁永权 

机构地区：[1]School of Electrical and Electronic Engineering, East China Jiaotong University [2]Key Laboratory of Advanced Control & Optimization of Jiangxi Province

出　　处：《Chinese Journal of Chemical Engineering》2015年第1期192-198,共7页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(51174091,61164013,61364013)

摘　　要：Considering that the on-line measurement and automatic control of element component content(ECC) are difficult to perform in rare earth cascade extraction process, the ECC distribution profile is dynamically regulated at all stages to assess the effect of product purity control. Focusing on the theory of countercurrent extraction, the technology parameters and pre-setting flow-rates during the extract process are designed. Under varying process parameters, a novel step by step model is also proposed for each stage to analyze the impact on the distribution profile change. Combining the mass balance model and ECC changing trend at the monitoring stage, the ECC distribution profile can be automatically regulated by dynamically compensating the related extract or scrubbing liquid flow-rate. To this end, the required product purity at the two outlets is achieved. Based on Wincc and Matlab dynamic simulators, a specific Pr/Nd cascade extraction process is used to illustrate and demonstrate the application of the present approach.Considering that the on-line measurement and automatic control of element component content（ECC） are difficult to perform in rare earth cascade extraction process, the ECC distribution profile is dynamically regulated at all stages to assess the effect of product purity control. Focusing on the theory of countercurrent extraction, the technology parameters and pre-setting flow-rates during the extract process are designed. Under varying process parameters, a novel step by step model is also proposed for each stage to analyze the impact on the distribution profile change. Combining the mass balance model and ECC changing trend at the monitoring stage, the ECC distribution profile can be automatically regulated by dynamically compensating the related extract or scrubbing liquid flow-rate. To this end, the required product purity at the two outlets is achieved. Based on Wincc and Matlab dynamic simulators, a specific Pr/Nd cascade extraction process is used to illustrate and demonstrate the application of the present approach.

关 键 词：Rare earth cascade extraction Balance model Distribution regulation Pr/Nd 

分 类 号：TQ028.32[化学工程]