| 摘要 |
A two stage pulp screening device is disclosed of particular use as a high capacity unit replacing two separate units. The device has an upper pulp screening chamber and a lower pulp screening chamber, the lower chamber has a stationary cylindrical screen with a streamlined rotor mounted therein for rotation about a vertical axis. The upper chamber has a further stationary cylindrical screen with at least one foil cleaning bar mounted therein for rotation about the same vertical axis. In the upper chamber around the further screen is a stationary inlet baffle which forms an annular space between the screen and the baffle. In this space is at least one helical baffle which forms a spiral passage descending beside the screen. A reject discharge is provided in the lower portion of the annular space for removing all rejects and pulp slurry that has not passed through the screen. |
