PT852272E - PROCESS OF RECOVERY IN A FACTORY OF PASTE - Google Patents

PROCESS OF RECOVERY IN A FACTORY OF PASTE

Info

Publication number
PT852272E
PT852272E PT97203861T PT97203861T PT852272E PT 852272 E PT852272 E PT 852272E PT 97203861 T PT97203861 T PT 97203861T PT 97203861 T PT97203861 T PT 97203861T PT 852272 E PT852272 E PT 852272E
Authority
PT
Portugal
Prior art keywords
potassium
recovery boiler
recovery
spent liquor
chloride
Prior art date
Application number
PT97203861T
Other languages
Portuguese (pt)
Inventor
Bjorn Svedin
Magnus Linsten
Roland Pudas
Roy Hammer-Olsen
Ingrid Velander
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
Application filed by Eka Chemicals Ab filed Critical Eka Chemicals Ab
Publication of PT852272E publication Critical patent/PT852272E/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
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0042—Fractionating or concentration of spent liquors by special methods
    • D21C11/005—Treatment of liquors with ion-exchangers
    • 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
    • D21C11/06—Treatment of pulp gases; Recovery of the heat content of the gases; Treatment of gases arising from various sources in pulp and paper mills; Regeneration of gaseous SO2, e.g. arising from liquors containing sulfur compounds
    • D21C11/063—Treatment of gas streams comprising solid matter, e.g. the ashes resulting from the combustion of black liquor
    • D21C11/066—Separation of solid compounds from these gases; further treatment of recovered products

Landscapes

  • Paper (AREA)
  • Treatment Of Water By Ion Exchange (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

A substantial and increasing problem with the pulping chemical recovery system, is the presence of chloride and potassium in the spent liquor entering the recovery boiler. Chloride and potassium increase the stickiness of carryover deposits and dust particles to the recovery boiler tubes, which accelerate fouling and plugging in the upper part of the recovery boiler. The present invention relates to a process by which the content of potassium ions in a recovery system for pulping chemicals can be reduced. The process comprises bringing spent liquor to a recovery boiler, burning said spent liquor, collecting precipitator dust formed, forming a solution by dissolving the precipitator dust (9) in a liquid (2,31,71), where the solution of precipitator dust is subjected to a treatment with an inorganic ion exchange material (8) in order to remove at least a part of the potassium therein. <IMAGE>
PT97203861T 1997-01-03 1997-12-10 PROCESS OF RECOVERY IN A FACTORY OF PASTE PT852272E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9700012A SE9700012D0 (en) 1997-01-03 1997-01-03 Recovery process in a pulp mill

Publications (1)

Publication Number Publication Date
PT852272E true PT852272E (en) 2002-08-30

Family

ID=20405353

Family Applications (1)

Application Number Title Priority Date Filing Date
PT97203861T PT852272E (en) 1997-01-03 1997-12-10 PROCESS OF RECOVERY IN A FACTORY OF PASTE

Country Status (7)

Country Link
EP (1) EP0852272B1 (en)
AT (1) ATE215143T1 (en)
CA (1) CA2225927C (en)
DE (1) DE69711355T2 (en)
ES (1) ES2171832T3 (en)
PT (1) PT852272E (en)
SE (1) SE9700012D0 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015010179A1 (en) * 2013-07-25 2015-01-29 Noram Engineering And Constructors Ltd. Method of reducing chloride and potassium ion concentrations in a pulp mill chemical recovery system
SE1451569A1 (en) * 2014-12-17 2015-12-01 Aprotech Engineering Ab Process for production of a fertilizer comprising potassiumsulfate
FI129103B (en) 2017-04-28 2021-07-15 Andritz Oy Method for processing fly ash of a recovery boiler

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3684672A (en) * 1969-08-07 1972-08-15 Mitsubishi Heavy Ind Ltd Process for paper manufacture
US5352332A (en) * 1991-01-28 1994-10-04 Maples Gerald E Process for recycling bleach plant filtrate
SE9202419D0 (en) * 1992-08-24 1992-08-24 Eka Nobel Ab REDUCTION OF CHLORIDE IN PULPING CHEMICAL RECOVERY SYSTEMS
SE9502583D0 (en) * 1995-07-12 1995-07-12 Eka Chemicals Ab Leaching process

Also Published As

Publication number Publication date
EP0852272A1 (en) 1998-07-08
DE69711355T2 (en) 2002-10-31
ES2171832T3 (en) 2002-09-16
CA2225927A1 (en) 1998-07-03
CA2225927C (en) 2002-04-09
EP0852272B1 (en) 2002-03-27
DE69711355D1 (en) 2002-05-02
ATE215143T1 (en) 2002-04-15
SE9700012D0 (en) 1997-01-03

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