Patent ID: 6336992
Filing Date: 2002-01-08
Classification: B03B,D21B,D21C,Y02W

Abstract:
A method for wetting coarsely shredded waste paper material, comprising the steps of:(a) introducing the waste paper material into a wetting enclosure; (b) introducing wetting fluid into the wetting enclosure and allowing the waste paper material to be wetted by the wetting fluid; and (c) discharging a suspension of wetted waste paper material and wetting fluid from the wetting enclosure; (d) decreasing the pressure within the wetting enclosure during step (a) or step (b) to a pressure p1; and (e) after step (d) increasing the pressure within the wetting enclosure to a pressure p2 while keeping the waste paper material immersed in the wetting fluid, wherein (f) steps (d) and (e) are practiced such that the decreasing and increasing of the pressure within the wetting enclosure take place within an interval of <1 minute, and wherein steps (d) and (e) are repeated at least two times.