2011 Fiscal Year Final Research Report
Development of Liquid-liquid Countercurrent Centrifuge Extractor for Nuclide Separation Application
| Project/Area Number |
21360466
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Nuclear engineering
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
TAKESHITA Kenji 東京工業大学, 原子炉工学研究所, 教授 (80282870)
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| Co-Investigator(Kenkyū-buntansha) |
KIKURA Hiroshige 東京工業大学, ソリューション研究機構, 准教授 (00302985)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 遠心抽出 / 液々向流 / Taylor-Couette流 / 多段分離 / 分散 / 核種分離 / 流動可視化 |
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| Research Abstract |
A new liquid-liquid countercurrent extractor with Taylor-Couette flow was proposed and following three research subjects to improve the extraction performance were studied
(1) Increasing the stability of oil-water countercurrent flow
(2) Highly efficient extraction using oil-water emulsion
(3) Scale-up of extractor and feasibility of total extraction process
As a result, we made clear the chemico-physical properties of oil phase, water phase and inner rotor surface, which were required for the formation of suitable countercurrent flow with highly dispersed oil. By stabilizing the Taylor-Couette flow with oil-water emulsion by the addition of a small amount of PEG(poly-ethyleneglycol), the high-speed extraction with high theoretical stages more than 10 stages were attained. Finally the scale-up tests were carried out. By the use of larger extractor, the increase of theoretical stages was observed for the positive extraction and the high recovery rate for the back extraction
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