小型环隙式离心萃取器的水力学和传质研究

STUDY ON THE PERFORMANCE OF THE HYDRAULIC AND MASS TRANSFER WITH MINIATURE CENTRIFUGAL CONTACTOR

用单级＝１０ｍｍ小型环隙式离心萃取器研究了水－３０％ＴＲＰＯ－煤油体系在不同条件下的水力学特性和硝酸、Ｆｅ３＋和Ｎｄ３＋的传质特性。在转速４０００—４５００ｒ／ｍｉｎ、流量＜６００ｍＬ／ｈ、相比（ｏ／ａ）１／１０—１０／１情况下，硝酸和Ｎｄ３＋的传质级效率比较高，为９０％左右。由于Ｆｅ３＋的萃取动力学速率比较慢，因此其萃取级效率比较低。

The hydraulic performance and the mass transfer properties of HNO 3、Fe 3+ 、Nd 3+ are studied in H 2O 30%TRPO kerosene system at different conditions with single stage φ=10 mm miniature centrifugal contactor.The rotor′s speed varies from 4000 r/min to 4500 r/min.The total throughput is less than 600 mL/h.The phase ratio(o/a) changes from 1/10 to 10/1.Under the above experimental conditions,the single contactor operats very well and gives good performance.The stage efficiencies of HNO 3 and Nd 3+ are about 90%.The Fe 3+ extraction is very slow kinetically and the stage efficiency of Fe 3+ is low.