SE0102717L - Procedure for leaching electric filter ash from a soda boiler - Google Patents

Procedure for leaching electric filter ash from a soda boiler

Info

Publication number
SE0102717L
SE0102717L SE0102717A SE0102717A SE0102717L SE 0102717 L SE0102717 L SE 0102717L SE 0102717 A SE0102717 A SE 0102717A SE 0102717 A SE0102717 A SE 0102717A SE 0102717 L SE0102717 L SE 0102717L
Authority
SE
Sweden
Prior art keywords
filter ash
electrical filter
leaching
procedure
solid phase
Prior art date
Application number
SE0102717A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE517587C2 (en
SE0102717D0 (en
Inventor
Martin Wimby
Lars Olausson
Mikael Eriksson
Original Assignee
Kvaerner Pulping Tech
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 Kvaerner Pulping Tech filed Critical Kvaerner Pulping Tech
Priority to SE0102717A priority Critical patent/SE517587C2/en
Publication of SE0102717D0 publication Critical patent/SE0102717D0/en
Publication of SE0102717L publication Critical patent/SE0102717L/en
Publication of SE517587C2 publication Critical patent/SE517587C2/en
Priority to PCT/SE2002/001405 priority patent/WO2003016616A1/en
Priority to EP02751936A priority patent/EP1444395B1/en
Priority to AT02751936T priority patent/ATE480662T1/en
Priority to DE60237629T priority patent/DE60237629D1/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

Abstract

The invention relates to a process for purifying electrical filter ash from chlorides, in particular, by means of leaching and subsequently separating off crystallized substance, which crystallized substance is returned to the process for forming black liquor. A good separation of solid phase in the form of crystalline Na2S04 is obtained by means of a repeated gentle agitation of slurried electrical filter ash in a leaching tank with a total dwell time of between 1 and 5 hours, directly followed by centrifugation of the leached electrical filter ash. The solid phase is supplied to the black liquor prior to final evaporation and/or recovery in the recovery boiler. More than 70 % of the chloride content in the electrical filter ash and 70 % of the potassium content are efficiently leached out, and an improved utilization of process chemicals is obtained.
SE0102717A 2001-08-14 2001-08-14 Procedure for leaching electric filter ash from a soda boiler SE517587C2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
SE0102717A SE517587C2 (en) 2001-08-14 2001-08-14 Procedure for leaching electric filter ash from a soda boiler
PCT/SE2002/001405 WO2003016616A1 (en) 2001-08-14 2002-07-23 Process for leaching electrical filter ash from a recovery boiler
EP02751936A EP1444395B1 (en) 2001-08-14 2002-07-23 Process for leaching electrical filter ash from a recovery boiler
AT02751936T ATE480662T1 (en) 2001-08-14 2002-07-23 METHOD FOR LEACHING ELECTRICAL FILTER ASH FROM A RECOVERY BOILER
DE60237629T DE60237629D1 (en) 2001-08-14 2002-07-23 METHOD FOR THE EXHAUST OF ELECTRIC FILTER ASH FROM A RECYCLING BOILER

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0102717A SE517587C2 (en) 2001-08-14 2001-08-14 Procedure for leaching electric filter ash from a soda boiler

Publications (3)

Publication Number Publication Date
SE0102717D0 SE0102717D0 (en) 2001-08-14
SE0102717L true SE0102717L (en) 2002-06-25
SE517587C2 SE517587C2 (en) 2002-06-25

Family

ID=20285027

Family Applications (1)

Application Number Title Priority Date Filing Date
SE0102717A SE517587C2 (en) 2001-08-14 2001-08-14 Procedure for leaching electric filter ash from a soda boiler

Country Status (5)

Country Link
EP (1) EP1444395B1 (en)
AT (1) ATE480662T1 (en)
DE (1) DE60237629D1 (en)
SE (1) SE517587C2 (en)
WO (1) WO2003016616A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE529103C2 (en) * 2005-09-21 2007-05-02 Metso Power Ab Procedure for the purification of flue gases and treatment of ash from waste incineration
EP1798297A1 (en) * 2005-12-16 2007-06-20 CTU - Conzepte Technik Umwelt AG Process for the treatment of heavy-metal bearing dust
SE530373C3 (en) * 2006-11-22 2008-06-10 Metso Power Ab Apparatus and method for leaching chloride and potassium from electric filter ash
EP2427598B1 (en) * 2009-05-06 2016-01-06 Valmet Aktiebolag Process for improved leaching of electrostatic precipitator ash from a recovery boiler
US9333468B2 (en) 2012-09-24 2016-05-10 Abengoa Bioenergy New Technologies, Llc Soak vessels and methods for impregnating biomass with liquid
FI129103B (en) 2017-04-28 2021-07-15 Andritz Oy Method for processing fly ash of a recovery boiler

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08170288A (en) * 1994-12-15 1996-07-02 Mitsubishi Heavy Ind Ltd Removal of sodium salt and potassium salt from caught ash of soda-recovering boiler
DE19519626A1 (en) 1995-05-29 1996-12-05 Siemens Ag Manual valve
SE9502583D0 (en) * 1995-07-12 1995-07-12 Eka Chemicals Ab Leaching process
SE9603972D0 (en) * 1996-10-31 1996-10-31 Kvaerner Pulping Tech Process for making ash consisting mainly of sodium sulphate from a soda boiler
SE512504C2 (en) 1999-04-23 2000-03-27 Kemira Kemi Ab Treating ash from electrofilter used to scrub flue gases from soda oven

Also Published As

Publication number Publication date
DE60237629D1 (en) 2010-10-21
ATE480662T1 (en) 2010-09-15
WO2003016616A1 (en) 2003-02-27
EP1444395B1 (en) 2010-09-08
SE517587C2 (en) 2002-06-25
SE0102717D0 (en) 2001-08-14
EP1444395A1 (en) 2004-08-11

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