Axial mixing and mass transfer characteristics of pulsed extraction column with discs and doughnuts  

作　　者：王悦 景山 吴秋林 吴伟 

机构地区：[1]Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 102201, China

出　　处：《中国有色金属学会会刊：英文版》2006年第1期178-184,共7页Transactions of Nonferrous Metals Society of China

摘　　要：The axial mixing is a key factor for design and scaling up of the pulsed extraction column which has strong influence on the mass transfer performances of the pulsed extraction column with discs and doughnuts. A steady-state concentration profile measurement was used to evaluate the mass transfer and axial mixing coefficients for the nitric acid/water/30%TRPO (in kerosene) system in the pulsed extraction column with the diameter of 38 mm on the condition of the TRPO-kerosene solution as the continuous phase and the flow ratio of 1∶1. Experimental results indicate that Ey evaluated by the experiments is in good agreement with that given by Burratti’s correlation; the axial mixing is far smaller for the continuous phase than that for the dispersed phase. However the empirical correlation for HOX is only given based on the present data.The axial mixing is a key factor for design and scaling up of the pulsed extraction column which has strong influence on the mass transfer performances of the pulsed extraction column with discs and doughnuts. A steady-state concentration profile measurement was used to evaluate the mass transfer and axial mixing coefficients for the nitric acid/water/30%TRPO （in kerosene） system in the pulsed extraction column with the diameter of 38 mm on the condition of the TRPO-kerosene solution as the continuous phase and the flow ratio of 1 ： 1. Experimental results indicate that Ey evaluated by the experiments is in good agreement with that given by Burratti＇s correlation; the axial mixing is far smaller for the continuous phase than that for the dispersed phase. However the empirical correlation for Hox is only given based on the present data.

关 键 词：轴向混合 质量迁移 脉动萃取塔 轴向扩散模型 浓度分布曲线 

分 类 号：TH113[机械工程—机械设计及理论]