Method and arrangement for re-cooking knots in batch cooking of pulp

The present invention relates to a knot re-cooking arrangement for batch cooking of pulp, comprising: a batch digester (4) for cooking wood chips in a Kraft process to produce pulp, a knot removal device for removing knots (10) from pulp that has been discharged from the batch digester (4), and a re...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	KUUSISTO, Petteri
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS THEREFOR PAPER-MAKING PRODUCTION OF CELLULOSE PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS REGENERATION OF PULPING LIQUORS TEXTILES TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKINGMACHINE
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Beschreibung
Zusammenfassung:	The present invention relates to a knot re-cooking arrangement for batch cooking of pulp, comprising: a batch digester (4) for cooking wood chips in a Kraft process to produce pulp, a knot removal device for removing knots (10) from pulp that has been discharged from the batch digester (4), and a return system for returning knots (10) in a carrying medium (12') to the batch digester (4), wherein the return system is arranged to supply the knots (10) in the carrying medium (12') to an upper portion (42) of the batch digester (4) and wherein the return system is arranged to supply the knots (10) in the carrying media (12') to the batch digester (4) after a prehydrolysis step (107) but before a cooking step (104). The invention also relates to a method for re-cooking knots in batch cooking of pulp.