Patent ID: 8702909
Filing Date: 2014-04-22
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 liquor line connected to a vessel, wood chips, disposed inside the vessel, suspended in a chips suspension, at least a first pump and a second pump connected in parallel to a bottom of the vessel, a first transfer line having an inlet and an outlet defined therein, the inlet of the first transfer line being connected to the first pump and the outlet of the first transfer line being connected to the top of the digester, a second transfer line having an inlet and outlet defined therein, the inlet of the second transfer line being connected to the second pump and the outlet of the second transfer line being connected to the top of the digester, the first transfer line containing no other pump but the first pump, the second transfer line containing no other pump but the second pump, a scraper disposed at a bottom of the vessel, the vessel having a bucket-shaped outlet, the bucket-shaped outlet having two pump outlets defined therein, the first and second pumps having inlets connected to the pump outlets of the bucket-shaped outlet of the vessel, and the scraper having a stirrer extending into the bucket-shaped outlet, the stirrer having scraper arms being sweepable over the pump outlets.