Title:
サーモメカニカルパルプ製造装置
Document Type and Number:
Japanese Patent JP4674125
Kind Code:
B2
Abstract:
A system for thermomechanical refining of wood chips comprises preparing the chips for refining by exposing the chips to an environment of steam to soften the chips, compressively destructuring and dewatering the softened chips to a solids consistency above 55 percent, and diluting the destructured and dewatered chips to a consistency in the range of about 30 to 55 per cent. The destructuring partially defibrates the material. This diluted material is fed to a rotating disc primary refiner wherein each of the opposed discs has an inner ring pattern of bars and grooves and an outer ring pattern of bars and grooves. The destructured and partially defibrated chips are substantially completely defibrated in the inner ring and the resulting fibers are fibrillated in the outer ring. The compressive destructuring, dewatering, and dilution can all be implemented in one integrated piece of equipment immediately upstream of the primary refiner, and the fiberizing and fibrillating are both achieved between only one set of relatively rotating discs in the primary refiner.
Inventors:
Marc Jay. Sabourin
Look gingrass
Look gingrass
Application Number:
JP2005198626A
Publication Date:
April 20, 2011
Filing Date:
July 07, 2005
Export Citation:
Assignee:
Andritz Incorporated
International Classes:
D21B1/14; B02C7/12; D21D1/30; D21H11/08; D21B
Domestic Patent References:
| JP2003515008A | ||||
| JP2003119684A | ||||
| JP2001149804A | ||||
| JP2002028510A |
Foreign References:
| US4283252 |
Attorney, Agent or Firm:
Shizuo Nakamura