| 摘要 |
A screening apparatus (10) comprises a pair of stationary concentric screens (26 and 32) with a plurality of foil structures (42) rotating therebetween and adjacent thereto, individual foils (44 and 46) of each foil structure being radially aligned. The screening apparatus comprises a tangentially disposed slurry inlet (20) and a diametrically and tangentially disposed heavy rejects outlet (22) at the end of a heavy rejects trap. The light reject/accepts slurry flows into the screening zone and, after separation, is discharged at an end of the screening apparatus by way of respective light rejects (58, 60, or 60") and accepts (16) outlets. The accept outlet is located axially with respect to the screen cylinders and rotating foils so the pressure pulses are virtually eliminated in the screening process. The apparatus may be constructed for vertical of horizontal rotation of the foils.
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