摘要
本文采用按基本原理进行设计的方法,对三种不同直径(内径分别为0.05m、0.29m和2.4m)的四种转盘塔的放大效应及其成因进行了探讨。计算结果表明,大型塔与小型塔相比,其特性速度、两相表观速度较高,液滴直径较大,分散传质单元高度较高,总传质系数较低,因而传质效率较低,表明转盘塔存在较为严重的放大效应。
The scale up of three different scales of rotating disc contactor （RDC） （inner diameters are 0.05 m, 0.29 m, 2.4 m for laboratory scale, pilot scale and industry scale RDC respectively） is numerically studied based on fundamental theory of solvent extraction. The results show that as RDC scales up, its superficial velocity, characteristic velocity, drop size and height of a diffusion unit increase, while the total mass transfer coefficient decreases, so the mass transfer efficiency for a large size RDC is relatively low, i.e. scale up effect exists for RDC.
关键词
转盘萃取塔
分离工程
液液萃取
放大
rotating disc contactor （RDC）
separation engineering
liquid-liquid extraction
scale up
