CL2011001351A1 - Method and arrangement for washing chemical pulp, related to a bleaching process, which comprises directing in the pulp flow direction at least one portion of filtrate formed in a stage upstream of the washing with respect to the pulp flow direction , to a downstream washing stage. - Google Patents

Method and arrangement for washing chemical pulp, related to a bleaching process, which comprises directing in the pulp flow direction at least one portion of filtrate formed in a stage upstream of the washing with respect to the pulp flow direction , to a downstream washing stage.

Info

Publication number
CL2011001351A1
CL2011001351A1 CL2011001351A CL2011001351A CL2011001351A1 CL 2011001351 A1 CL2011001351 A1 CL 2011001351A1 CL 2011001351 A CL2011001351 A CL 2011001351A CL 2011001351 A CL2011001351 A CL 2011001351A CL 2011001351 A1 CL2011001351 A1 CL 2011001351A1
Authority
CL
Chile
Prior art keywords
washing
flow direction
stage
pulp
pulp flow
Prior art date
Application number
CL2011001351A
Other languages
Spanish (es)
Inventor
Olavi Pikka
Antonio De Andrede Marco
De Bittencourt Grötzner Mariana
Ronny Adolfo Geiger
Peca Tervola
Original Assignee
Andritz Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=42308101&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CL2011001351(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Andritz Oy filed Critical Andritz Oy
Publication of CL2011001351A1 publication Critical patent/CL2011001351A1/en

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0021—Introduction of various effluents, e.g. waste waters, into the pulping, recovery and regeneration cycle (closed-cycle)
    • D21C11/0028—Effluents derived from the washing or bleaching plants
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
    • D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites
    • D21C9/144—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites with ClO2/Cl2 and other bleaching agents in a multistage process
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
    • D21C9/153—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications with ozone

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)

Abstract

MÉTODO Y DISPOSICIÓN PARA LAVAR PASTA QUÍMICA RELACIONADOS CON EL BLANQUEADO, DONDE LA PASTA SE TRATA EN POR ID MENOS DOS ETAPAS. POR LO MENOS UNA DE LAS ETAPAS ES UNA ETAPA DE BLANQUEADO. LA PASTA TRATADA SE LAVA, Y SE OBTIENE UNA PASTA LAVADA Y FILTRADA CON UN BUEN NIVEL DE LIMPIEZA. POR LO MENOS UNA PORCIÓN DEL FILTRADO FORMADO EN UNA ETAPA CORRIENTE ARRIBA RESPECTO DE LA DIRECCIÓN DEL FLUJO DE LA PASTA SE CONDUCE EN LA DIRECCIÓN DEL FLUJO DE LA PASTA PARA UTILIZAR DICHA PORCIÓN DEL FILTRADO EN UNA ETAPA DE LAVADO CORRIENTE ABAJO COMO LIQUIDO DE LAVADO Y/O LIQUIDO DE DILUCIÓN PARA LA PASTA.METHOD AND ARRANGEMENT FOR WASHING CHEMICAL PASTA RELATED TO BLEACHING, WHERE THE PASTE IS TREATED IN BY ID LESS TWO STAGES. AT LEAST ONE OF THE STAGES IS A WHITENING STAGE. THE TREATED PASTE IS WASHED, AND A WASHED AND FILTERED PASTE IS OBTAINED WITH A GOOD CLEANING LEVEL. AT LEAST A PORTION OF THE FILTER FORMED IN AN UP-CURRENT STAGE REGARDING THE DIRECTION OF THE PASTE FLOW IS CONDUCTED IN THE DIRECTION OF THE PASTE FLOW TO USE SUCH PORTION OF THE FILTER IN A DOWN-CURRENT WASHING STAGE AS LIQUID WASHING / OR DILUTION LIQUID FOR PASTE.

CL2011001351A 2010-06-07 2011-06-06 Method and arrangement for washing chemical pulp, related to a bleaching process, which comprises directing in the pulp flow direction at least one portion of filtrate formed in a stage upstream of the washing with respect to the pulp flow direction , to a downstream washing stage. CL2011001351A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI20105644A FI123299B (en) 2010-06-07 2010-06-07 PROCEDURES AND ARRANGEMENTS FOR WASHING Pulp in connection with bleaching

Publications (1)

Publication Number Publication Date
CL2011001351A1 true CL2011001351A1 (en) 2012-07-06

Family

ID=42308101

Family Applications (1)

Application Number Title Priority Date Filing Date
CL2011001351A CL2011001351A1 (en) 2010-06-07 2011-06-06 Method and arrangement for washing chemical pulp, related to a bleaching process, which comprises directing in the pulp flow direction at least one portion of filtrate formed in a stage upstream of the washing with respect to the pulp flow direction , to a downstream washing stage.

Country Status (5)

Country Link
CN (1) CN102268830B (en)
BR (1) BRPI1103082A2 (en)
CL (1) CL2011001351A1 (en)
FI (1) FI123299B (en)
UY (1) UY33432A (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5164044A (en) * 1990-05-17 1992-11-17 Union Camp Patent Holding, Inc. Environmentally improved process for bleaching lignocellulosic materials with ozone
US6569284B1 (en) * 1996-09-24 2003-05-27 International Paper Company Elemental-chlorine-free bleaching process having an initial Eo or Eop stage
CN100557123C (en) * 2004-03-09 2009-11-04 徐守才 Few chlorine bleach of alkaline sodium sulfite method straw pulp and the totally-enclosed reuse technology of middle section water
JP2008184719A (en) * 2007-01-31 2008-08-14 Daio Paper Corp Method for reusing waste water from acid treatment step in production process of kraft pulp which has acid treatment step before bleaching step

Also Published As

Publication number Publication date
UY33432A (en) 2012-01-31
FI20105644A0 (en) 2010-06-07
CN102268830A (en) 2011-12-07
FI20105644A (en) 2011-12-08
CN102268830B (en) 2015-11-25
FI123299B (en) 2013-02-15
BRPI1103082A2 (en) 2012-11-20

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