| 摘要 |
8 Method and equipment for thickening of pulp slurry or suspension by means of a rotary disk filter partly submerged in the pulp slurry or suspension contained in a basin. A positive pressure prevails outside the filter faces of the disks. Besides for filtering, pressurized air is also utilized for detaching the filtered pulp from the filter faces of the disks by passing pressurized air into the sector of each filter that is at the detaching stage. From this sector the air is discharged through the filter face to outside the filter face. The disk filter comprises a basin, a hood placed above the basing and filter disks mounted on a shaft, consisting Or sectors, and revolving in the basin. So as to produce positive pressure outside the filter faces of the disks, a longitudinal hollow space inside the shaft is connected with a source of positive pressure and with the disk sector placed at the detaching position of each disk. |
