| 摘要 |
PURPOSE:To reduce the amt. consumed of a flocculant, and to obtain a concentration method with high concentration efficiency by branching a part of a slurry to send to a flocculant adding zone, adding a high molecular flocculant thereto, and mixing the effluent liquid therefrom with the remaining slurry, and then separating. CONSTITUTION:A slurry 1 is branched. The branched slurry is sent to a line 2, and the remaining slurry to a line 3. The flow rate ratio to be branched is preferably regulated to 20-80% of the total flow rate of the slurry. The branched slurry is sent to a flocculant adding zone wherein the high molecular flocculant is added from a line 4. A mixing tank provided with an agitator may be used for the flocculant adding zone 5. Flocs are formed in the branched slurry by allowing to react with the high molecular flocculant. The slurry, after passing through the flocculant adding zone 5, enters a mixing zone 7 through a line 6, mixed therein with the remaining slurry from the line 3, and sent to a solid-liquid separation zone 9. The separated liquid is discharged from a line 11, and the concentrated substance from a line 10 to the outside of the system.
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