WO2008152189A3 - Method for treating liquid flows at a chemical pulp mill - Google Patents

Method for treating liquid flows at a chemical pulp mill Download PDF

Info

Publication number
WO2008152189A3
WO2008152189A3 PCT/FI2008/000070 FI2008000070W WO2008152189A3 WO 2008152189 A3 WO2008152189 A3 WO 2008152189A3 FI 2008000070 W FI2008000070 W FI 2008000070W WO 2008152189 A3 WO2008152189 A3 WO 2008152189A3
Authority
WO
WIPO (PCT)
Prior art keywords
plant
pulp
liquor
chloride
cooking
Prior art date
Application number
PCT/FI2008/000070
Other languages
French (fr)
Other versions
WO2008152189A2 (en
Inventor
Janne Vehmaa
Olavi Pikka
Pekka Tervola
Original Assignee
Andritz Oy
Janne Vehmaa
Olavi Pikka
Pekka Tervola
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
Priority claimed from FI20070477A external-priority patent/FI122812B/en
Application filed by Andritz Oy, Janne Vehmaa, Olavi Pikka, Pekka Tervola filed Critical Andritz Oy
Publication of WO2008152189A2 publication Critical patent/WO2008152189A2/en
Publication of WO2008152189A3 publication Critical patent/WO2008152189A3/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
    • D21C9/10—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
    • 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
    • D21C11/0064—Aspects concerning the production and the treatment of green and white liquors, e.g. causticizing green liquor
    • 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
    • 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
    • D21C9/02—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
    • 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
    • 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)

Landscapes

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

Abstract

The invention relates to a method of treating liquid flows at a chemical pulp mill comprising at least an alkaline cooking process utilizing cooking liquor for producing pulp, brown stock treatment with essentially closed liquid cycles, a pulp bleaching plant using ECF-bleaching wherein chloride- containing effluents are generated, a chemical recovery plant comprising a causticizing plant and chemical recovery boiler plant, and effluent purification. A characteristic feature of the method is that chloride-containing effluents of the bleaching plant are introduced to the effluent purification where they are treated for decreasing the organic matter content thereof, at least 20 % of the purified effluent is led back to a pulp mill process, purified effluent is used in at least one stage of causticizing as raw water source so that the chloride-containing liquid formed in the process stage is a weak white liquor fraction that is led to the recovery boiler plant as a smelt dissolving liquid component and therefrom further via regeneration of cooking liquor, pulp cooking and pulp washing as a waste liquor component to evaporation, wherefrom the concentrated waste liquor is led for treatment into a recovery boiler process, wherein a separation process for chlorides is arranged in order to control the chloride-level of the liquor cycle.
PCT/FI2008/000070 2007-06-15 2008-06-13 Method for treating liquid flows at a chemical pulp mill WO2008152189A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FI20070477 2007-06-15
FI20070477A FI122812B (en) 2007-06-15 2007-06-15 A method for treating fluid flows at a pulp mill
FI20070523A FI122237B (en) 2007-06-15 2007-07-03 A method for treating fluid flows at a pulp mill
FI20070523 2007-07-03

Publications (2)

Publication Number Publication Date
WO2008152189A2 WO2008152189A2 (en) 2008-12-18
WO2008152189A3 true WO2008152189A3 (en) 2009-03-05

Family

ID=38331541

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2008/000070 WO2008152189A2 (en) 2007-06-15 2008-06-13 Method for treating liquid flows at a chemical pulp mill

Country Status (2)

Country Link
FI (1) FI122237B (en)
WO (1) WO2008152189A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9057156B2 (en) 2010-12-22 2015-06-16 Skzo Nobel Chemicals International B.V. Process for improving chlorine dioxide bleaching of pulp

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994020675A1 (en) * 1993-03-02 1994-09-15 Kamyr, Inc. Zero discharge mill distillation, salt recovery, and water management
US5380402A (en) * 1992-07-30 1995-01-10 Kamyr, Inc. Reducing pulp mill liquid discharge
WO1995021291A1 (en) * 1994-02-07 1995-08-10 Kvaerner Pulping Technologies Ab Process for separating off chloride from sulphide-containing alkaline liquor
US5545292A (en) * 1994-09-09 1996-08-13 Institute Of Paper Science And Technology, Inc. Kraft smelt solidification in a fluidized bed reactor
WO1997003245A1 (en) * 1995-07-11 1997-01-30 Ahlstrom Machinery Oy Method of separating impurities from lime and lime sludge and a method of causticizing green liquor containing impurities, such as silicon, in two stages
US5628875A (en) * 1992-12-03 1997-05-13 Mo Och Domsjo Aktiebolag Method for clarifying green liquor by monitoring the calcium concentration in the spent liquor prior to or at combustions
US5938892A (en) * 1991-01-28 1999-08-17 Champion International Corporation Process for recycling bleach plant filtrate
US6336994B1 (en) * 1992-12-02 2002-01-08 Kvaerner Pulping Aktiebolag Totally chlorine free bleaching process using recovered filtrate
US6569284B1 (en) * 1996-09-24 2003-05-27 International Paper Company Elemental-chlorine-free bleaching process having an initial Eo or Eop stage

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA761255B (en) 1975-03-11 1977-03-30 Erco Envirotech Ltd Bleachplant operation
WO2003104547A1 (en) 2002-06-07 2003-12-18 Andritz Oy System for producing energy at a pulp mill
WO2006111608A1 (en) 2005-04-22 2006-10-26 Andritz Oy Apparatus and method for producing energy at a pulp mill
US10787708B2 (en) 2017-07-12 2020-09-29 Macau University Of Science And Technology Method of identifying a gene associated with a disease or pathological condition of the disease

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5938892A (en) * 1991-01-28 1999-08-17 Champion International Corporation Process for recycling bleach plant filtrate
US5380402A (en) * 1992-07-30 1995-01-10 Kamyr, Inc. Reducing pulp mill liquid discharge
US6336994B1 (en) * 1992-12-02 2002-01-08 Kvaerner Pulping Aktiebolag Totally chlorine free bleaching process using recovered filtrate
US5628875A (en) * 1992-12-03 1997-05-13 Mo Och Domsjo Aktiebolag Method for clarifying green liquor by monitoring the calcium concentration in the spent liquor prior to or at combustions
WO1994020675A1 (en) * 1993-03-02 1994-09-15 Kamyr, Inc. Zero discharge mill distillation, salt recovery, and water management
WO1995021291A1 (en) * 1994-02-07 1995-08-10 Kvaerner Pulping Technologies Ab Process for separating off chloride from sulphide-containing alkaline liquor
US5545292A (en) * 1994-09-09 1996-08-13 Institute Of Paper Science And Technology, Inc. Kraft smelt solidification in a fluidized bed reactor
WO1997003245A1 (en) * 1995-07-11 1997-01-30 Ahlstrom Machinery Oy Method of separating impurities from lime and lime sludge and a method of causticizing green liquor containing impurities, such as silicon, in two stages
US6569284B1 (en) * 1996-09-24 2003-05-27 International Paper Company Elemental-chlorine-free bleaching process having an initial Eo or Eop stage

Also Published As

Publication number Publication date
FI20070523A (en) 2008-12-16
FI122237B (en) 2011-10-31
FI20070523A0 (en) 2007-07-03
WO2008152189A2 (en) 2008-12-18

Similar Documents

Publication Publication Date Title
WO2008152187A3 (en) Method for treating liquid flows at a chemical pulp mill
WO2008152185A3 (en) Method in connection with the washing of pulp at a chemical pulp mill
NO132361B (en)
US8632657B2 (en) Method for treating liquid flows at a chemical pulp mill
WO2008152189A3 (en) Method for treating liquid flows at a chemical pulp mill
CN104169493B (en) A kind of method and system processing liquid flow in chemical pulp mills
AU2010323001B2 (en) Method of treating liquid flows at a chemical pulp mill
FI127290B (en) A method and system for treating fluid flows at a pulp mill
WO2008152188A3 (en) Method for treating pulp at a chemical pulp mill
WO2013135958A2 (en) A method and a system for treating liquid flows at a chemical pulp mill
WO2014072584A1 (en) A method and a system for treating liquid flows at a chemical pulp mill
CN104169494B (en) A kind of method and system in chemical pulp mills treatment fluid stream
SE500390C2 (en) Extraction of wastewater from mechanical pulping in the washing process of the chemical cooking process
Chinnaraj et al. Integrated Approach For Water Conservation And Pollution Reduction: A Step Towards Minimum Impact Mill.
Mannbro Closed-cycle recovery and combustion of bleachery filtrate: Part 2. Heat balance and chemical process modifications
Ochola et al. Pulp and paper

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08775448

Country of ref document: EP

Kind code of ref document: A2

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 08775448

Country of ref document: EP

Kind code of ref document: A2