NO971504L - Fremgangsmåte ved separat behandling av sure og alkaliske avlöpsströmmer fra et blekeanlegg - Google Patents

Fremgangsmåte ved separat behandling av sure og alkaliske avlöpsströmmer fra et blekeanlegg

Info

Publication number
NO971504L
NO971504L NO971504A NO971504A NO971504L NO 971504 L NO971504 L NO 971504L NO 971504 A NO971504 A NO 971504A NO 971504 A NO971504 A NO 971504A NO 971504 L NO971504 L NO 971504L
Authority
NO
Norway
Prior art keywords
acidic
alkaline
wastewater
bleaching plant
process stream
Prior art date
Application number
NO971504A
Other languages
English (en)
Other versions
NO971504D0 (no
Inventor
Johan Landfors
Hans Johansson
Mikael Engstroem
Original Assignee
Eka Chemicals 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
Priority claimed from SE9403372A external-priority patent/SE9403372L/xx
Priority claimed from SE9502169A external-priority patent/SE9502169D0/xx
Application filed by Eka Chemicals Ab filed Critical Eka Chemicals Ab
Publication of NO971504D0 publication Critical patent/NO971504D0/no
Publication of NO971504L publication Critical patent/NO971504L/no

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0078—Condensation of vapours; Recovering volatile solvents by condensation characterised by auxiliary systems or arrangements
    • B01D5/009—Collecting, removing and/or treatment of the condensate
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/048—Purification of waste water by evaporation
    • 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
    • D21C11/0042—Fractionating or concentration of spent liquors by special methods

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Wood Science & Technology (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)

Abstract

Surt og alkalisk avløpsvann fra et blekeanlegg omfatter ulike mengder uorganisk og organisk mater- iale og har ulike mengder saltinnhold. Dersom det sure og det alkaliske avløpsvannet blandes, blir det vanskeligere å separere de ulike substanser fra prosesstrømmen i en påfølgende behandling, og det resulterer i større mengder avløpsvann, hvilket er ufordelaktig ved metoder hvor målet er å lukke blekeanlegget. Dessuten inntreffer problemer på grunn av dannelsen av inkrustasjoner på varmeover- førings-overflater. Den foreliggende oppfinnelse vedrører en forbedret fremgangsmåte ved behandling av prosessavløpsvannet fra et blekeanlegg, hvori den sure og alkaliske prosesstrøm konsentreres separat i fordampere, hvorved saltinnholdet i den sure prosesstrømmen reduseres ved elektrodialyse, og den alkaliske prosesstrømm forbrennes. Denne fremgangsmåte gjør det mulig å redusere mengden av resirkulert vann og unngå problemene tilknyttet prosessutstyret, og fremgangsmåten bidrar også til en høyere grad av lukking sogar når blekingen omfatter klorindioksid (ECF).
NO971504A 1994-10-05 1997-04-03 Fremgangsmåte ved separat behandling av sure og alkaliske avlöpsströmmer fra et blekeanlegg NO971504L (no)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
SE9403372A SE9403372L (sv) 1994-10-05 1994-10-05 Rening och recirkulation av avloppsvatten till ett massablekeri genom elektrodialys eller indunstning och förbränning
US13995P 1995-06-12 1995-06-12
SE9502169A SE9502169D0 (sv) 1995-06-14 1995-06-14 Förfarande för rening av processvatten vid massaframställning
US191495P 1995-06-20 1995-06-20
PCT/SE1995/001121 WO1996011299A1 (en) 1994-10-05 1995-10-03 A method for treating acid and alkaline waste streams from a bleach plant separately

Publications (2)

Publication Number Publication Date
NO971504D0 NO971504D0 (no) 1997-04-03
NO971504L true NO971504L (no) 1997-04-03

Family

ID=26662147

Family Applications (1)

Application Number Title Priority Date Filing Date
NO971504A NO971504L (no) 1994-10-05 1997-04-03 Fremgangsmåte ved separat behandling av sure og alkaliske avlöpsströmmer fra et blekeanlegg

Country Status (8)

Country Link
EP (1) EP0784721A1 (no)
JP (1) JPH10506964A (no)
AU (1) AU3712195A (no)
BR (1) BR9509188A (no)
CA (1) CA2201117A1 (no)
FI (1) FI971605A0 (no)
NO (1) NO971504L (no)
WO (1) WO1996011299A1 (no)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5792315A (en) * 1995-02-27 1998-08-11 Eka Chemicals Ab Purifying aqueous effluent from a pulp mill using electro chemical membrane device
SE9500732L (sv) * 1995-02-27 1996-08-28 Eka Chemicals Ab Förfarande för behandling av vätskor
EP0863113A1 (en) * 1997-03-07 1998-09-09 Akzo Nobel N.V. Process for treating wastewater
US6425974B1 (en) 1997-03-07 2002-07-30 Akzo Nobel N.V. Process for treating wastewater from a bleach plant
WO2001032561A1 (en) * 1999-11-02 2001-05-10 Shell Internationale Research Maatschappij B.V. Process for the purification of industrial waste water from a propylene oxide production process
FR2809385A1 (fr) * 2000-05-26 2001-11-30 Tsb Internat Methode et installation d'epuration et de dessalement de l'eau de mer
CN1321070C (zh) * 2005-02-03 2007-06-13 刘德沛 环氧丙烷生产废水处理方法及其多效蒸发装置
CN104928963B (zh) * 2015-05-08 2017-10-24 白博 一种零排放的化机浆制浆废液在线高浓提取工艺

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3986951A (en) * 1975-11-18 1976-10-19 Champion International Corporation Chlorine-based bleachery effluent treatment
US4049490A (en) * 1976-02-23 1977-09-20 Veniamin Petrovich Zaplatin Electrodialysis of bleaching effluent
AU619580B2 (en) * 1988-08-23 1992-01-30 Sappi Limited Elimination of bleach effluents
FI85293C (sv) * 1990-05-04 1992-03-25 Poeyry Jaakko & Co Oy Förfarande för rening och återföring av cellulosafabrikers blekeriavva tten

Also Published As

Publication number Publication date
NO971504D0 (no) 1997-04-03
CA2201117A1 (en) 1996-04-18
FI971605A (fi) 1997-04-16
WO1996011299A1 (en) 1996-04-18
JPH10506964A (ja) 1998-07-07
AU3712195A (en) 1996-05-02
EP0784721A1 (en) 1997-07-23
FI971605A0 (fi) 1997-04-16
BR9509188A (pt) 1997-12-30

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