Cold blow system for batch production of pulp

Details Cold blow system for batch production of pulp Cold blow system for batch production of pulp

1988-12-06

1990-12-04

Lacey, David L.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With heat recovery

162 60, 162233, 162242, 162246, 162375, 68181R, D21C 708, D21C 712, D21C 904

Patent

active

049751484

ABSTRACT:
A method and system for cooling pulp discharged from a batch type digester and recovering heat from it. A stream of pulp together with spent cooking liquor is discharged from a batch digester to a diffuser and passed through the diffuser at substantially the same pressure as that of the digester. The pulp stream is caused to flow between screens and hot spent cooking liquor is displaced with cooler liquor flowing across the pulp stream thereby lowering the temperature of the pulp stream. The displayed cooking liquor and the pulp is withdrawn from the diffuser.

REFERENCES:
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patent: 3475271 (1969-10-01), Laakso
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patent: 4042452 (1977-08-01), Arhippuinen
patent: 4123318 (1978-10-01), Sherman
patent: 4212705 (1980-07-01), Babington
patent: 4213882 (1980-07-01), Eriksson
patent: 4215447 (1980-08-01), Gartland
patent: 4840047 (1989-06-01), Richter

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