Patent Number: 6,332,542

Title: Tramp material removal from pulp feed system

Abstract: Dense, tramp material, is efficiently separated in a comminuted cellulosicfibrous material feed system, for example in a chemical cellulose digesterfeed system, in a simple but effective matter. By merely utilizing agenerally vertical conduit and a slurry flow within it (which may beaugmented by high speed liquid introduction), that is caused to turn in aradiused path, centrifugal force allows separation of the tramp materialinto a cavity beneath the radius transition without requiring anymechanical element to engage the slurry. Appropriate purges, baffles, anddischarge mechanisms may be provided. Alternatively, a tramp materialseparator may be built into an otherwise conventional metering screw in adigester feed system, or one or more centrifugal separators can beprovided downstream of the slurry pump in a chip slurry transport systemor digester feed system.

Inventors: Bilodeau; Vic L. (Queensbury, NY), Chasse; R. Fred (Stratham, NH), Prough; James R. (Vancouver, WA), Stromberg; C. Bertil (Glens Falls, NY), Walley; Craig A. (Vancouver, WA)


International Classification: B03B 5/62 (20060101); B03B 5/00 (20060101); B04C 3/00 (20060101); B04C 3/06 (20060101); B07B 001/00 (); D21C 009/08 ()

Expiration Date: 12/25/2014