High consistency pulp refining using low consistency pulp refini

Details High consistency pulp refining using low consistency pulp refini High consistency pulp refining using low consistency pulp refini

1996-01-05

1997-11-18

Husar, John M.

Solid material comminution or disintegration

Processes

With application of fluid or lubricant material

241 2411, 241 28, 2412613, B02C 702, B02C 712

Patent

active

056879172

ABSTRACT:
A refiner-apparatus and method for producing refined pulp by exerting mechanical forces on pulp fibres. The apparatus includes a member having a pulp side and a drainage side, the pulp side having a plurality of spaced apart raised bar portions thereon. A plurality of drainage conduits are formed in the member, the conduits extending between the pulp side and the drainage side of the member, each drainage conduit having inlet and outlet openings respectively. The inlet openings are disposed on the pulp side of the member and the outlet openings are disposed on the drainage side of the member such that water expelled from pulp fibres forced against the pulp side is received in the inlet openings and is conducted through the drainage conduits to the drainage side of the member. Generally, the method involves draining water from pulp fibres squeezed between facing refiner members, through at least one drainage conduit in at least one of the refiner members. Use of the method produces a low consistency pulp solution of refined pulp having properties comparable to high consistency refined pulp.

REFERENCES:
patent: 2801084 (1957-07-01), Krupp et al.
patent: 3214104 (1965-10-01), Breuninger et al.
patent: 4372495 (1983-02-01), Marton et al.
patent: 4555064 (1985-11-01), Asano et al.
patent: 4819881 (1989-04-01), Sepke
patent: 5531385 (1996-07-01), Witsken
Chapter 13 (pp. 194-208) from "Handbook for Pulp & Paper Technologists", 2nd Edition, by G.A. Smook, published by Angus Wilde Publications, Copyright 1992 by G.A. Smook.

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