Displacement heating in continuous digesters

Details Displacement heating in continuous digesters Displacement heating in continuous digesters

1992-03-24

1993-10-26

Jones, W. Gary

Paper making and fiber liberation

Apparatus

Digester

162 37, 162 39, 162 47, 162239, 162249, 162250, D21C 710, D21C 714

Patent

active

052562557

ABSTRACT:
An apparatus and method for treating cellulosic wood chips in a digestion process for the liberation of pulp in a caustic hydroxide solution at high pressures and temperatures by delivering preconditioned wood chips to a first chamber and circulating a low temperature black liquor through the chamber to preheat the chips, while continuously feeding the chips through the chamber to a second chamber at high temperature and pressure, circulating high temperature black liquor to the chips in the second chamber to advance them to cooking temperature, feeding white liquor and the chips to a digester for the digestion process over a predetermined period of time, and removing digested pulp and delivering the pulp to a washer with the black liquor for washing being utilized for the first chamber, and heating the white liquor through a heat exchange process with the high temperature black liquor.

REFERENCES:
patent: 1646084 (1927-10-01), Dunbar
patent: 1829378 (1931-10-01), Thiriet
patent: 2675311 (1954-04-01), Natwick
patent: 3308088 (1967-02-01), Gessner
patent: 3537953 (1970-11-01), Brown et al.
patent: 3801431 (1974-04-01), Ingemarsson
patent: 4123318 (1978-10-01), Sherman
patent: 4248662 (1981-02-01), Wallick
patent: 4578149 (1986-03-01), Fagerlund
patent: 4764251 (1988-08-01), stman
patent: 4849059 (1989-07-01), Grant
patent: 4954219 (1990-09-01), Gloersen
"The Kamyr Continuous Digester", Pulp & Paper, 3rd Ed. pp. 386-391.

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