| 摘要 |
<p>A method and apparatus for effecting low-pressure separation from a suspension of reclaimed wastepaper of both cellulose pulp fibers and light impurity particles having a specific gravity less than that of the pulp fibers, characterized by the use of a wastepaper cleaner operable in the low-pressure hydrocyclone mode to deposit the heavier pulp fibers at the bottom of a chamber and to establish an upward flow of the lighter particles in a vertical vortex in the central portion of the chamber. The invention also includes a method and apparatus for separating the cellulose pulp fibers from a reclaimed wastepaper suspension by a combined high-pressure drop low-pressure drop separation process, use being made of a high-pressure drop hydrocyclone separator that is connected in unitized construction with the low-pressure wastepaper cleaner. Finally, an improved waste-paper cleaning system is disclosed including in combination with the high-pressure drop low-pressure drop separator a further low-pressure wastepaper cleaner for effecting second-stage cleaning of the lighter separated impurity particles, and a further hydrocyclone separator for effecting second-stage cleaning of the heavier separated impurity particles.</p> |
