Patent ID: 8709211
Filing Date: 2014-04-29
Classification: D21C

Abstract:
1. A feed system for a continuous digester wherein wood chips are continuously fed into a top of the digester and fed out from a bottom of the digester, comprising: a vessel having a bucket-shaped outlet defined therein, the bucket-shaped outlet containing a chips suspension and being disposed at a bottom of the vessel, the bucket-shaped outlet having an upper inlet defined therein and a cylindrical mantle surface, and a bottom, the cylindrical mantel surface of the bucket-shaped outlet having at least two outlet openings defined therein, a first single pump and a second single pump, each pump having a pump inlet and a pump outlet defined therein, the first and second single pumps having no pump serially connected thereto upstream or downstream thereof, the first and second single pump being in parallel, the pump inlets being connected to the outlet openings of the cylindrical mantle surface, each pump outlet being connected to a transfer line that extends to the top of the digester for pumping the chips suspension disposed in the bucket-shaped outlet to the digester, a stirrer disposed at the bottom of the vessel and arranged to rotate in the bucket-shaped outlet, and the stirrer having at least two scraper arms that are adapted to sweep over the pump inlets arranged in the mantle surface of the bucket-shaped outlet.