FI20080008L - Treatment of ozone-containing gas in connection with pulp bleaching - Google Patents

Treatment of ozone-containing gas in connection with pulp bleaching Download PDF

Info

Publication number
FI20080008L
FI20080008L FI20080008A FI20080008A FI20080008L FI 20080008 L FI20080008 L FI 20080008L FI 20080008 A FI20080008 A FI 20080008A FI 20080008 A FI20080008 A FI 20080008A FI 20080008 L FI20080008 L FI 20080008L
Authority
FI
Finland
Prior art keywords
ozone
gas
bleaching
containing gas
residual
Prior art date
Application number
FI20080008A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI20080008A0 (en
Inventor
Janne Vehmaa
Original Assignee
Andritz Oy
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 Andritz Oy filed Critical Andritz Oy
Priority to FI20080008A priority Critical patent/FI20080008L/en
Publication of FI20080008A0 publication Critical patent/FI20080008A0/en
Priority to PCT/FI2009/000002 priority patent/WO2009087265A2/en
Publication of FI20080008L publication Critical patent/FI20080008L/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
    • 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
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
    • D21C9/153—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications with ozone

Abstract

The present invention relates to a method of and apparatus for decreasing the ozone content of gas in connection with an ozone bleaching process for pulp in a chemical pulp mill plant provided with or connected to an ECF-bleaching plant for pulp and provided with at least production of a mixture of ozone and carrier gas, ozone bleaching equipment, discharge line for mixture of residual ozone and carrier gas from the ozone bleaching equipment and emergency discharge line for ozone-containing gas bypassing the ozone bleaching equipment and after these a connected first gas scrubber for treating the ozone-containing gas. An essential feature of the invention is that the last treatment stage for ozone-containing gas for removing ozone is carried out in the second gas scrubber, wherein both residual gas from ECF bleaching and residual gas of the ozone stage are treated with reductants. Thereby the elimination of residual ozone can be ensured, especially in disturbance situations.
FI20080008A 2008-01-08 2008-01-08 Treatment of ozone-containing gas in connection with pulp bleaching FI20080008L (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FI20080008A FI20080008L (en) 2008-01-08 2008-01-08 Treatment of ozone-containing gas in connection with pulp bleaching
PCT/FI2009/000002 WO2009087265A2 (en) 2008-01-08 2009-01-08 Treatment of ozone-containing gas in connection with bleaching of pulp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI20080008A FI20080008L (en) 2008-01-08 2008-01-08 Treatment of ozone-containing gas in connection with pulp bleaching

Publications (2)

Publication Number Publication Date
FI20080008A0 FI20080008A0 (en) 2008-01-08
FI20080008L true FI20080008L (en) 2009-07-09

Family

ID=39004236

Family Applications (1)

Application Number Title Priority Date Filing Date
FI20080008A FI20080008L (en) 2008-01-08 2008-01-08 Treatment of ozone-containing gas in connection with pulp bleaching

Country Status (2)

Country Link
FI (1) FI20080008L (en)
WO (1) WO2009087265A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3970835A1 (en) * 2020-09-22 2022-03-23 SUEZ Groupe Ozone scrubber and ozone scrubbing method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6126781A (en) * 1991-08-01 2000-10-03 Union Camp Patent Holding, Inc. Process for conditioning ozone gas recycle stream in ozone pulp bleaching
WO1993018226A1 (en) * 1992-03-02 1993-09-16 Kamyr, Inc. Combined ozone destruction and fiber scrubbing in paper pulp mills
US5302246A (en) * 1992-07-30 1994-04-12 Kamyr, Inc. Method of managing liquid steams in a pulp mill
US6210527B1 (en) * 1994-03-14 2001-04-03 The Boc Group, Inc. Pulp bleaching method wherein an ozone bleaching waste stream is scrubbed to form an oxygen containing stream
CA2229046A1 (en) * 1995-08-07 1997-02-20 Shusuke Minami Method for reprocessing an ozone-containing gas present in a pulp bleaching plant
PT1337315E (en) * 2000-12-01 2005-02-28 Linde Ag METHOD FOR THE EXHAUST GAS DEPURATION OF A CELLULOSE PULP FACTORY

Also Published As

Publication number Publication date
WO2009087265A2 (en) 2009-07-16
WO2009087265A3 (en) 2009-09-03
FI20080008A0 (en) 2008-01-08

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