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

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...

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1. Verfasser: KUUSISTO, Petteri
Format: Patent
Sprache:eng
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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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creator KUUSISTO, Petteri
description 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.
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subjects 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
title Method and arrangement for re-cooking knots in batch cooking of pulp
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