| 摘要 |
The invention regards hydrocyclone separation, particularly of cellulose fibers, where the object is to eliminate light contaminants, and where the useful product is exited through apex outlets (13). In order to have good separation efficiency even at low base outlet flow, it is proposed to mount an obstruction (21) in a hydrocyclone for obstructing central axial flow toward the apex. Reject proportions below 30 % and lower can then be combined with good separation efficiency. The number of separation stages can be lowered. The invention is particularly suitable for recycling waste paper. |
