Method and apparatus for batch production of pulp including impr

Details Method and apparatus for batch production of pulp including impr Method and apparatus for batch production of pulp including impr

1977-02-10

1979-02-06

Bashore, S. Leon

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With plural or specified mechanical defibering step

162 47, 162 52, 162 51, 162234, 162239, 162246, D21C 708

Patent

active

041383117

ABSTRACT:
Cooked pulp at an elevated temperature and pressure is discharged from a plurality of batch digesters sequentially into a first blow tank. The first blow tank is maintained at a substantially constant pressure which is less than the pressure in the digester and greater than atmospheric. Pressurized steam is released from the first blow tank into a dirty steam system as pulp is discharged into a second blow tank at a substantially constant rate in a non-interrupted flow stream. The pressure in the second blow tank is maintained at about atmospheric pressure. A blow line refiner is interposed between the first and second blow tanks.

REFERENCES:
patent: 2029360 (1936-02-01), Dean
patent: 2115835 (1938-05-01), Young
patent: 2870009 (1959-01-01), Richter
patent: 3432382 (1969-03-01), Justus
patent: 3567573 (1971-03-01), Case
patent: 4002528 (1977-01-01), Laakso

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