Patent ID: 6120646
Filing Date: 2000-09-19
Classification: D21C,Y10S

Abstract:
A feeding system for feeding comminuted cellulose containing material and liquid to a continuously operating treatment vessel, comprising:a chute operating at a first pressure and having a first level of a liquid and a first level of a material;a high pressure feeder having first and second inlets and first and second outlets, the first inlet in operative engagement with the chute, the high pressure feeder having a plurality of rotatable pockets defined therein;a feed line having one end in operative engagement with the second outlet of the high pressure feeder and an opposite end in operative engagement with a treatment vessel, the feed line maintaining a second pressure for conveying the liquid and material to the treatment vessel, the second pressure being greater than the first pressure;a return line in operative engagement with the second inlet of the high pressure feeder, the return line carrying a return liquid flow from the treatment vessel; anda first recirculation conduit having one end operatively attached to the first outlet of the high pressure feeder and an opposite end in fluid communication with one of the inlets of the high pressure feeder for conveying a recirculation flow back to the high pressure feeder, the rotatable pockets being rotatable into a position so that at least one of the rotatable pocket is in open fluid communication with both the first inlet and the first outlet of the high pressure feeder, the first outlet being without a screen.