DE69729215D1 - OXYGEN TREATMENT OF FILTRATES FROM A BLEACHING PLANT - Google Patents

OXYGEN TREATMENT OF FILTRATES FROM A BLEACHING PLANT

Info

Publication number
DE69729215D1
DE69729215D1 DE69729215T DE69729215T DE69729215D1 DE 69729215 D1 DE69729215 D1 DE 69729215D1 DE 69729215 T DE69729215 T DE 69729215T DE 69729215 T DE69729215 T DE 69729215T DE 69729215 D1 DE69729215 D1 DE 69729215D1
Authority
DE
Germany
Prior art keywords
pulp
bleaching
filtrates
part flow
oxygen treatment
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
DE69729215T
Other languages
German (de)
Other versions
DE69729215T2 (en
Inventor
Monica Bokstroem
Peter Hardmeier
Bjoern Jansson
Martin Petersson
Anna Tigerstroem
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AGA AB
Original Assignee
AGA AB
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
Application filed by AGA AB filed Critical AGA AB
Application granted granted Critical
Publication of DE69729215D1 publication Critical patent/DE69729215D1/en
Publication of DE69729215T2 publication Critical patent/DE69729215T2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • D21C9/1026—Other features in bleaching processes
    • 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
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0057—Oxidation of liquors, e.g. in order to reduce the losses of sulfur compounds, followed by evaporation or combustion if the liquor in question is a black liquor

Abstract

A method for the treatment of cellulose fibres in a pulp stream (22) comprises the following steps. A pulp is prepared (21). The pulp is subjected to a bleaching, comprising at least a bleaching step (25, 30) by the addition of an oxidizing bleaching agent. After the bleaching, liquid is removed (28, 33) from the pulp while obtaining a residue liquid and at least a part flow of the residue liquid obtained is conveyed back to the pulp stream (22) via a transport conduit by means of a pump device. Said part flow of the residue liquid is treated by oxygen (45) by the supply of oxygen to the part flow downstream of the pump device.
DE69729215T 1996-12-27 1997-12-23 OXYGEN TREATMENT OF FILTRATES FROM A BLEACHING SYSTEM Expired - Fee Related DE69729215T2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9604802A SE9604802L (en) 1996-12-27 1996-12-27 Process for treating cellulose fibers
SE9604802 1996-12-27
PCT/SE1997/002214 WO1998029598A1 (en) 1996-12-27 1997-12-23 Treatment of bleach plant filtrates with oxygen

Publications (2)

Publication Number Publication Date
DE69729215D1 true DE69729215D1 (en) 2004-06-24
DE69729215T2 DE69729215T2 (en) 2005-05-25

Family

ID=20405154

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69729215T Expired - Fee Related DE69729215T2 (en) 1996-12-27 1997-12-23 OXYGEN TREATMENT OF FILTRATES FROM A BLEACHING SYSTEM

Country Status (10)

Country Link
EP (1) EP0950136B1 (en)
JP (1) JP2001519858A (en)
AT (1) ATE267288T1 (en)
AU (1) AU5582598A (en)
BR (1) BR9714440A (en)
CA (1) CA2275710C (en)
DE (1) DE69729215T2 (en)
NO (1) NO325725B1 (en)
SE (1) SE9604802L (en)
WO (1) WO1998029598A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE522161C2 (en) * 1999-06-17 2004-01-20 Kvaerner Pulping Tech Method and device for oxygen delignification with improved copper reduction
FI117391B (en) 2000-05-16 2006-09-29 Andritz Oy Method and apparatus for pulping
FI20065494A0 (en) * 2006-07-14 2006-07-14 Linde Ag Process for treating a filtrate with oxygen and using oxygen to reduce harmful components of a filtrate
FI126551B (en) 2009-11-25 2017-02-15 Andritz Oy A method for treating fluid flows at a pulp mill
WO2015197917A1 (en) * 2014-06-23 2015-12-30 Metsä Fibre Oy Method of delignifying fibrous suspensions of alkaline cooking

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0564443A1 (en) * 1992-03-15 1993-10-06 Kamyr, Inc. Treatment of bleach plant filtrates
US5509999A (en) * 1993-03-24 1996-04-23 Kamyr, Inc. Treatment of bleach plant effluents

Also Published As

Publication number Publication date
SE9604802L (en) 1998-06-28
CA2275710C (en) 2006-03-14
ATE267288T1 (en) 2004-06-15
NO993120L (en) 1999-08-25
JP2001519858A (en) 2001-10-23
WO1998029598A1 (en) 1998-07-09
AU5582598A (en) 1998-07-31
NO325725B1 (en) 2008-07-07
BR9714440A (en) 2000-03-21
EP0950136A1 (en) 1999-10-20
CA2275710A1 (en) 1998-07-09
DE69729215T2 (en) 2005-05-25
EP0950136B1 (en) 2004-05-19
NO993120D0 (en) 1999-06-23
SE9604802D0 (en) 1996-12-27

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee