Patent Number: 6,254,723

Title: Method for continuous cooking in a single-vessel digester

Abstract: In a single-vessel system for continuous cooking of kraft pulp, chips and liquor are conveyed from a high pressure feeder in a transfer line to a first end of a digester. A part of the liquor is separated from the chips that are withdrawn from an outlet defined in an upper part of the digester and conveyed in a return line to the high pressure feeder. A constituent flow of liquor is led from the return line and heated and fed via one or more inlets into the digester at a location that is downstream of the outlet for the return line.

Inventors: Snekkenes; Vidar (Karlstad, SE), Gustavsson; Lennart (Karlstad, SE)

Assignee: Kvaerner Pulping AB

International Classification: D21C 3/24 (20060101); D21C 7/00 (20060101); D21C 7/06 (20060101); D21C 3/00 (20060101); D21C 007/14 ()

Expiration Date: 07/03/2018