脉冲筛板柱萃取分离钍、铀的研究(Ⅲ)——脉冲筛板柱稳态浓度剖面的数学模拟  

A STUDY OF PULSED SIEVE—PLATE COLUMN FOR THE Th-U EXTRACTION SEPARATION PROCESS (Ⅲ)——THE MATHEMATICAL SIMULATION OF STEADY STATE CONCENTRATION PROFILES OF PULSED SIEVE-PLATE COLUMN

作　　者：安延军[1] 仝继红[1] 马栩泉[1] 邰德荣[1] 

机构地区：[1]清华大学核能技术设计研究院

出　　处：《核科学与工程》1993年第2期155-163,共9页Nuclear Science and Engineering

摘　　要：在2英寸脉冲筛板柱中,用扩散模型描述钍、铀低去污循环流程的传质过程。采用复合形法直接由浓度剖面同时确定轴向混合系数、传质系数等模型参数。由此获得的浓度剖面计算值与实验测定的浓度剖面比较符合。结果表明:Thorex过程脉冲筛板柱水相连续时两相轴向混合程度接近,有机相连续时分散相轴向混合小于连续相轴向混合。采用复合形法寻优,解决了以往方法中由于各种优化参数选择不当造成的计算结果与实际情况的偏差及程序容易溢出等问题。此算法简单,结果较可靠,收敛也比较快。In 50 mm diameter pulsed sieve-plate column, the mass transfer process of the Th-U low decontaminant cycle process was described by diffusion model. The model parameters of axial mixing coefficient and mass transfer coefficient were determined simultaneous directly from concentration profile by the complex optimum method. The obtained calculated values of concentration profile are in accord with the experimental values. The results show that when aqueous phase is continuous in Thorex process pulsed sieve-plate column two phases axial mixing is approach, and when organic phase is continuous the axial mixing of dispersion phase is less one of continuous phase. By use of complex optimum method, many shortcomings are overcome, such as the difference between calculating and experimental results due to the selection of some unadvisable methods and easy f lowding-out of computer program, et al. This method is simple and reliable, and convergence is quicker.

关 键 词：钍 铀 分离 萃取 脉冲筛板柱 

分 类 号：TL241.14[核科学技术—核燃料循环与材料]