| 主权项 |
1. A method for separating two solutions mixed in dispersion into two solution phases in a liquid-liquid extraction separation cell (1), in which method the dispersion is fed into the cell at the center of the feed end (2), wherein
the supplied dispersion is divided at the feed end (2) of the cell (1) into sideways proceeding flows by means of a first guide wall (4) positioned at an inclined angle (α) with respect to the vertical direction, and in between a bottom edge (5) of said wall (4) and the cell bottom (3), there is left a clearance gap (6), which is widened from a center towards sides of the cell, through which clearance gap the dispersion is forced to proceed near to the cell bottom (3), the dispersion distributed along the width of the cell (1) is prevented from proceeding directly in the lengthwise direction of the cell by means of said first guide wall (4), and the dispersion is allowed to proceed in the lengthwise direction of the cell only near to the cell bottom (3) by means of said clearance gap (6), the dispersion flow proceeding through the clearance gap (6) is, by means of a second guide wall (7), conducted to rise from near to the bottom (3) of the cell (1) diagonally upwards at an inclined angle (α), said second guide wall (7) being essentially parallel with the first guide wall (4) and located at a distance (L1) therefrom, so that in between the first guide wall (4) and the second guide wall (7), there is created an uptake shaft (8) extending diagonally upwards at an inclined angle (α), in which uptake shaft (8) the dispersion rises upwards and is compressed, the dispersion that was compressed to a predetermined degree of compression during the rise is divided into a number of adjacent sub-flows, distributed in one or several lines along the cell width and proceeding essentially in the lengthwise direction of the cell, the compressing dispersion rising in the uptake shaft (8) is divided into said number of sub-flows proceeding essentially in the lengthwise direction of the cell by means of a number of vertical slots (9) provided in the second guide wall (7), said slots (9) being arranged as a horizontal line (10) of vertical slots along the width of the second guide wall, at a distance from a bottom edge of the second guide wall, so that the dispersion, when reaching the line of vertical slots, has a predetermined degree of compression, vertical component of the sub-flows discharged through the vertical slots (9) is attenuated, and the sub-flows are conducted to proceed essentially in the lengthwise direction of the cell by means of a slanting plate (11), which is attached to the second guide wall (7), near to a top port of the line of vertical slots (9), to a separator part, where the solutions are separated from the dispersion step by step into two successive solution phases, and the solution phase separated from the sub-flows on the bottom (3) of the cell (1) is prevented from flowing back to the feed end by arranging the second guide wall (7) so that its bottom edge (13) is pressed tightly against the cell bottom. |
