Component content distribution profile control in rare earth countercurrent extraction process

doi:10.1016/j.cjche.2014.09.046

Chinese Journal of Chemical Engineering ›› 2015, Vol. 23 ›› Issue (1): 192-198.DOI: 10.1016/j.cjche.2014.09.046

• 过程系统工程与过程安全 • 上一篇下一篇

Component content distribution profile control in rare earth countercurrent extraction process

Hui Yang^1,2, Fangping Xu^1,2, Rongxiu Lu^1,2, Yongquan Ding^1,2

1 School of Electrical and Electronic Engineering, East China Jiaotong University, Nanchang 330013, China;
2 Key Laboratory of Advanced Control & Optimization of Jiangxi Province, Nanchang 330013, China

收稿日期:2013-12-26 修回日期:2014-04-17 出版日期:2015-01-28 发布日期:2015-01-24
通讯作者: Hui Yang
基金资助:
Supported by the National Natural Science Foundation of China (51174091, 61164013, 61364013).

Component content distribution profile control in rare earth countercurrent extraction process

Hui Yang^1,2, Fangping Xu^1,2, Rongxiu Lu^1,2, Yongquan Ding^1,2

1 School of Electrical and Electronic Engineering, East China Jiaotong University, Nanchang 330013, China;
2 Key Laboratory of Advanced Control & Optimization of Jiangxi Province, Nanchang 330013, China

Received:2013-12-26 Revised:2014-04-17 Online:2015-01-28 Published:2015-01-24
Contact: Hui Yang
Supported by:
Supported by the National Natural Science Foundation of China (51174091, 61164013, 61364013).

摘要/Abstract

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.

关键词: Rare earth cascade extraction, Balance model, Distribution regulation, Pr/Nd

Abstract: 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.

Key words: Rare earth cascade extraction, Balance model, Distribution regulation, Pr/Nd

Hui Yang, Fangping Xu, Rongxiu Lu, Yongquan Ding. Component content distribution profile control in rare earth countercurrent extraction process[J]. Chinese Journal of Chemical Engineering, 2015, 23(1): 192-198.

Hui Yang, Fangping Xu, Rongxiu Lu, Yongquan Ding. Component content distribution profile control in rare earth countercurrent extraction process[J]. Chin.J.Chem.Eng., 2015, 23(1): 192-198.

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Component content distribution profile control in rare earth countercurrent extraction process

Component content distribution profile control in rare earth countercurrent extraction process

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