Device for refining cellulose-containing material

• US 5,040,736 A
• Filed: 08/13/1990
• Issued: 08/20/1991
• Est. Priority Date: 09/19/1989
• Status: Expired due to Term

• Current Assignee: Sunds Defibrator Industries Ab (Valmet Oyj)
• Original Assignee: Sunds Defibrator Industries Ab (Valmet Oyj)
• Inventors: Obitz, Lars O.
• Primary Examiner(s): Rosenbaum, Mark
• Assistant Examiner(s): HAN, FRANCES CHIN
• Application Number:
  US07/566,260
• Time in Patent Office: 372 Days
• Field of Search: 241/244, 241/245, 241/246, 241/247, 241/248, 241/261.2, 241/261.3, 162/261
• US Class Current: 241/247
• CPC Class Codes: B02C 7/11 Details
• CPC Class Codes: D21D 1/30 Disc mills

Abstract

Apparatus for refining lignocellulose containing material is disclosed, including a refiner housing including a pair of refiner discs relatively rotatable about a pair of rotatable shafts. Each refiner disc includes a refiner element mounted thereon in a face-to-face relationship defining a refiner gap therebetween. The apparatus includes feed passages passing through the first refiner discs at a location proximate to the rotatable shaft for feeding the lignocellulose-containing material to the refiner gap element and the first refiner disc includes feeding wings corresponding to the feed passages and located partially in front of each such feed passage to accelerate the lignocellulose-containing material into the refiner gap, while the second refiner disc includes a substantially smooth surface portion at a location juxtaposed with the location of the feed passages in the first refiner disc.

Claims

1. Apparatus for refining lignocellulose-containing material comprising a first rotatable shaft, a first refiner disc mounted on said first rotatable shaft, a first refining element mounted on said first refiner disc, a second rotatable shaft, a second refiner disc mounted on said second rotatable shaft, a second refiner element mounted on said second refiner disc, said first and second refiner discs being mounted for relative rotation with respect to each other in opposite directions with said first and second refiner elements in face-to-face relationship thereby defining a refiner gap therebetween, feed means for feeding said lignocellulose-containing material to said refiner gap, said feed means including a plurality of feed passages passing through said first refiner disc into said refiner gap at a location proximate to said first rotatable shaft for passage outwardly through said refiner gap, said first refiner disc including a plurality of feeding wings corresponding to said plurality of feed passages, with each of said plurality of feeding winds being located at least partially in front of each of said corresponding plurality of feed passages so as to accelerate said lignocellulose-containing material passing through said plurality of feed passages into said refiner gap, and said second refiner disc including a substantially smooth surface portion at a location thereon juxtaposed with said location of said plurality of feed passages in said first refiner disc.

2. The apparatus of claim 1 including an annular plate member mounted on said first refiner disc, said plurality of feeding wings being mounted on said annular plate member.

3. The apparatus of claim 1 including an annular ring member mounted on said second refiner disc, said annular ring member including said substantially smooth surface portion.

4. The apparatus of claim 1 including four of said feed passages and four of said feeding wings corresponding thereto.

5. The apparatus of claim 1 wherein said feeding wings include wing portions including a portion extending substantially perpendicular from said first refiner disc.