| 摘要 |
A multi-stage tubular mixer-settler for use in liquid-liquid countercurrent extraction includes lengths of tubing disposed in a horizontal plane parallel with and spaced alongside and apart from one another. The lengths of tube each include a settling chamber. The mixing chambers associated with the settling chambers are in each length of tube and are provided with a rotary agitator disposed vertically in the mixing chamber. In order to require a smaller quantity of washing phase flow during extraction and to achieve a high throughput for satisfactory hydraulic conditions in the extractor, each mixing chamber is likewise configured as a horizontal portion of tube fitted flush with the settling chamber. The feeds of the two phases to be blended discharge into the free end face of each mixing chamber. Mixing and settling chambers are in each length of tube and are isolated from each other by a vertical partition wall provided with an aperture in the region of the interface between the phases. A conduit connects the mixing chamber to the settling chamber so that one phase can be fed back from the settling chamber to the mixing chamber. The mixing agitator effects the return by drawing the phase which is to be recycled through the conduit.
|
