新型多管塔流体力学特性

1 INTRODUCTION The column packed with Dixon gauze ring or heli-pak has been widely used for separating isotopes and isomerides for its remarkably low HETP when operated under optimum conditions. However a fatal weakness of such columns is that it works well only for small diameter columns. No matter whatever type of packing is used in the column, normally the HETP increases with the increase of the diameter of the column, and it appears that the more efficient the packing is, the more …

Liquid Flow Distribution in a New Type of Multi-tube Column

A new type of multi-tube column, in which a novel internal-structure is installed in the bed of random packing, has been invented. The internal-structure reduces the hydraulic radius of thc column and adjusts the gas/liquid flow so that the liquid maldistribution is greatly abated. A mathematical model with boundary conditions based on close-open mechanism at the internal-structure was established to study the hydraulic behavior of such a column and experiments were carried out to verify the applicability of the model. Predictions from the model agreed well with experimental results. Thc optimal ratio of the hydraulic diameter of the new multi-tube column to the packing element diameter is found to be 17.5 to 23.3 by employing the optimization method of nonlinear programming. And this new type of multi-tube column opens a new way for random packing columns to be scaled up for industry.