METHOD AND ARRANGEMENT FOR SEPARATING TWO SOLUTIONS MIXED IN DISPERSION INTO TWO SOLUTION PHASES IN A LIQUID-LIQUID EXTRACTION SEPARATION CELL.

摘要

The invention relates to a method and arrangement for separating two solutions mixed in dispersion into two solution phases in a liquid-liquid extraction separation cell (1). The shut-off element (3, 4, 5) comprises a front panel (8) that extends along the whole width of the cell. The front panel (8) includes a bottom edge (9), which is arranged at a distance (H1 H2 H3) from the cell bottom (7), so that the front panel (8) allows an unobstructed flow of the heavier solution phase directly forwards underneath the bottom edge (9). In the vertical direction, the front panel extends to such a height that it forces the lighter solution phase placed on the heavier solution phase to flow as a thin overflow layer over the top edge (12) of the front panel (8) and forces the dispersion to thicken in front of the front panel. The rear panel (15) is essentially parallel with the front panel (8) and placed at a distance (S) therefrom, so that in between the front panel and the rear panel, there is formed an uptake shaft (14) extending essentially vertically upwards, along which uptake shaft the thickened dispersion can rise upwardly and be compressed. At least one slanting plate (16) is in the direction of the flow placed at an inclined angle (δ), inclined upwardly with respect to the horizontal plane. The slanting plate attenuates and slows down the vertical component of the rising compressed dispersion flow and guides the dispersion essentially in the lengthwise direction of the cell as a dispersion flow to the successive separator part.