一种放化分离用的微型离心萃取器  

Miniature centrifugal contactor for radiochemical separation

作　　者：周嘉贞[1] 周秀珠[1] 于文东[1] 张成群[1] 何向明[1] 李凤歧[1] 

机构地区：[1]清华大学核能技术设计研究院

出　　处：《清华大学学报（自然科学版）》1997年第5期46-49,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家"八五"科技攻关项目

摘　　要：设计了一种适合实验室放化分离用的直径１０ｍｍ的微型环隙式离心萃取器，并对它进行了水力学性能和传质效率的试验。这种离心萃取器运行时，级停留时间为５～２０ｓ，级存留量为４ｍＬ，在水相与有机相的流量比为０．１～１５的范围内都能操作。以磷酸三丁酯（ＴＢＰ）—硝酸体系进行试验，Ｅｕ的传质级效率为９０％。在处理高放溶液时，这种设备可以远距离操作，并可以进行短停留时间条件下裂变产物在溶剂萃取过程中的行为研究。用这种离心萃取器完成了ＴＲ－ＰＯ流程的热实验，并获得满意的结果。A 10 mm diameter miniature annular centrifugal contactor suitable for laboratory use in radiochmical separation has been designed. The tests for both hydraulic performance and mass transfer efficiency have been performed. The 10 mm contactor can operate with residence times of 5￣20 s per stage and holdup volume of 4 mL per stage. It works well for aqueous organic flow ratio ranged from 0.1 to 15. Europium mass transfer efficiencies of 90% were attained for tributyl phosphate (TBP) nitric acid system. The laboratory equipment was suitable for remote operation with highly radioactive solutions, and study of fission product behavior in solvent extraction at short residence times. The satisfactory results were obtained in hot tests of TRPO extraction process that were performed by means of the 10 mm miniature centrifugal contactor.

关 键 词：离心萃取器 放化分离 高放废液处理 萃取法 

分 类 号：TL941.19[核科学技术—辐射防护及环境保护]