Continuous digester

Details Continuous digester Continuous digester

1996-06-28

1997-10-28

Husar, John M.

Solid material comminution or disintegration

Processes

With application of fluid or lubricant material

241 23, 241 2411, 241 2429, 241 28, 241 4601, 241 65, 241 70, B02C 1912

Patent

active

056809956

ABSTRACT:
A continuous pulp digester having an elongate horizontally aligned pressure vessel through which the wood chips and digesting fluid flow in a forward direction. In a first and second embodiments within the pressure vessel there is an inner container defining an elongate chamber or passageway having a square cross sectional configuration. In a third embodiment the digesting chamber is cylindrical. At locations along the digester, there are several pair of liquid flow inlets and liquid flow outlets which enable filtrate from a pulp washer and a digesting agent to be moved into and across the digesting chamber to flow out the flow outlets. These are recirculated in a net upstream flow pattern toward the outlet end of the digester, and discharged as black liquor at different locations in the digester.

REFERENCES:
patent: 3773610 (1973-11-01), Shouvlin et al.
patent: 4235665 (1980-11-01), Reinhall et al.
patent: 4726880 (1988-02-01), Smith
patent: 4872953 (1989-10-01), Smith
patent: 4886576 (1989-12-01), Sloan
patent: 5133507 (1992-07-01), Sepling et al.
patent: 5358185 (1994-10-01), Konecsny
patent: 5568896 (1996-10-01), Adams et al.

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