NO20002011L - Procedure for the treatment of ash - Google Patents

Procedure for the treatment of ash

Info

Publication number
NO20002011L
NO20002011L NO20002011A NO20002011A NO20002011L NO 20002011 L NO20002011 L NO 20002011L NO 20002011 A NO20002011 A NO 20002011A NO 20002011 A NO20002011 A NO 20002011A NO 20002011 L NO20002011 L NO 20002011L
Authority
NO
Norway
Prior art keywords
ash
water solution
added
treatment
precipitate
Prior art date
Application number
NO20002011A
Other languages
Norwegian (no)
Other versions
NO20002011D0 (en
Inventor
Ke Friman
Anders Larsson
Niclas Ijstedt
Original Assignee
Kemira Kemi 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 Kemira Kemi Ab filed Critical Kemira Kemi Ab
Publication of NO20002011D0 publication Critical patent/NO20002011D0/en
Publication of NO20002011L publication Critical patent/NO20002011L/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
    • D21C11/06—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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/78—Recycling of wood or furniture waste

Landscapes

  • Water Treatment By Electricity Or Magnetism (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Physical Water Treatments (AREA)
  • Processing Of Solid Wastes (AREA)
  • Paper (AREA)

Abstract

Det beskrives en fremgangsmåte ved behandling av aske som er blitt erholdt i et elektrofilter under rensing av røk-gasser fra en sodapanne. Fremgangsmåten kjennetegnes ved at det dannes en vannoppløsning av asken, at det settes hvit-lut til den dannede vannoppløsning og at den dannede fel-ning separeres fra oppløsningen. Hvitluten settes med for-del til i en mengde som i det minste er tilstrekelig for å felle stoffer i vannoppløsningen som danner vanskelig løse-lige sulfider. Det foretrekkes at hvitluten settes til til en pH på 9-14. Ved hjelp av fremgangsmåten kan innholdet av uønskede stoffer, såsom svovel, tungmetaller, spesielt kad-mium, kalium og klorid, justeres i en prosess for fremstil-ling av sulfatmasse.A method is described for the treatment of ash that has been obtained in an electrostatic precipitator during the purification of flue gases from a soda boiler. The method is characterized by the fact that a water solution of the ash is formed, that white lye is added to the formed water solution and that the precipitate formed is separated from the solution. The white liquor is advantageously added in an amount which is at least sufficient to precipitate substances in the water solution which form hard-to-dissolve sulphides. It is preferred that the white liquor is added to a pH of 9-14. With the help of the method, the content of unwanted substances, such as sulphur, heavy metals, especially cadmium, potassium and chloride, can be adjusted in a process for the production of sulphate mass.

NO20002011A 1999-04-23 2000-04-17 Procedure for the treatment of ash NO20002011L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9901453A SE512504C2 (en) 1999-04-23 1999-04-23 Treating ash from electrofilter used to scrub flue gases from soda oven

Publications (2)

Publication Number Publication Date
NO20002011D0 NO20002011D0 (en) 2000-04-17
NO20002011L true NO20002011L (en) 2000-10-24

Family

ID=20415320

Family Applications (1)

Application Number Title Priority Date Filing Date
NO20002011A NO20002011L (en) 1999-04-23 2000-04-17 Procedure for the treatment of ash

Country Status (4)

Country Link
DK (1) DK200000568A (en)
FI (1) FI20000952L (en)
NO (1) NO20002011L (en)
SE (1) SE512504C2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE517587C2 (en) 2001-08-14 2002-06-25 Kvaerner Pulping Tech Procedure for leaching electric filter ash from a soda boiler
FI129103B (en) 2017-04-28 2021-07-15 Andritz Oy Method for processing fly ash of a recovery boiler
SE2230392A1 (en) * 2022-11-30 2024-05-31 Valmet Oy A method for removing non-process elements in a kraft pulping process

Also Published As

Publication number Publication date
SE9901453L (en) 2000-03-27
FI20000952A7 (en) 2000-10-23
DK200000568A (en) 2000-10-24
NO20002011D0 (en) 2000-04-17
FI20000952L (en) 2000-10-23
SE9901453D0 (en) 1999-04-23
FI20000952A0 (en) 2000-04-20
SE512504C2 (en) 2000-03-27

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Legal Events

Date Code Title Description
FC2A Withdrawal, rejection or dismissal of laid open patent application