DE843757T1 - METHOD FOR REPROCESSING OZONE-CONTAINING GAS IN A PLANT BLEACHING PLANT - Google Patents

METHOD FOR REPROCESSING OZONE-CONTAINING GAS IN A PLANT BLEACHING PLANT

Info

Publication number
DE843757T1
DE843757T1 DE0843757T DE96927319T DE843757T1 DE 843757 T1 DE843757 T1 DE 843757T1 DE 0843757 T DE0843757 T DE 0843757T DE 96927319 T DE96927319 T DE 96927319T DE 843757 T1 DE843757 T1 DE 843757T1
Authority
DE
Germany
Prior art keywords
ozone
gas
containing gas
scrubber
alkaline medium
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
DE0843757T
Other languages
German (de)
Inventor
Jeffrey Rounsaville
Shusuke Minami
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beloit Technologies Inc
Original Assignee
Beloit Technologies Inc
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 US08/693,919 external-priority patent/US5695604A/en
Application filed by Beloit Technologies Inc filed Critical Beloit Technologies Inc
Publication of DE843757T1 publication Critical patent/DE843757T1/en
Pending legal-status Critical Current

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
    • 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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Detergent Compositions (AREA)
  • Treating Waste Gases (AREA)

Abstract

A method for reprocessing an ozone-containing gas present in a pulp bleaching plant comprising the steps of supplying the ozone-containing gas to a scrubber and reducing the ozone concentration of the gas as the gas flows through the scrubber. The step of reducing comprises the steps of supplying an alkaline medium to the scrubber and flowing the ozone-containing gas in countercurrent relationship with the alkaline medium within the scrubber so as to provide intimate contact between the ozone-containing gas and the alkaline medium, thereby converting the ozone-containing gas into a substantially ozone-free gas. The alkaline medium may comprise one of the following: a sodium hydroxide solution; white liquor; post oxygen stage filtrate; weak black liquor; or filtrate from an Eo stage of the pulp bleaching plant. The method further comprises the step of separately discharging the ozone-containing gas and the alkaline medium from the scrubber. The ozone-containing gas may comprise an off-gas, which has been partially reacted with a pulp within a pulp bleaching stage or alternatively may comprise fresh bleaching gas, having an ozone concentration ranging from about 6 % to about 14 % by weight within a carrier gas, with the fresh bleaching gas being supplied directly from an ozone generator to the scrubber.
DE0843757T 1995-08-07 1996-08-06 METHOD FOR REPROCESSING OZONE-CONTAINING GAS IN A PLANT BLEACHING PLANT Pending DE843757T1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US194595P 1995-08-07 1995-08-07
US08/693,919 US5695604A (en) 1996-08-05 1996-08-05 Method for reprocessing an ozone-containing gas present in a pulp bleaching plant
PCT/US1996/012776 WO1997006305A1 (en) 1995-08-07 1996-08-06 Method for reprocessing an ozone-containing gas present in a pulp bleaching plant

Publications (1)

Publication Number Publication Date
DE843757T1 true DE843757T1 (en) 1998-11-12

Family

ID=26669715

Family Applications (2)

Application Number Title Priority Date Filing Date
DE0843757T Pending DE843757T1 (en) 1995-08-07 1996-08-06 METHOD FOR REPROCESSING OZONE-CONTAINING GAS IN A PLANT BLEACHING PLANT
DE69604809T Expired - Fee Related DE69604809T2 (en) 1995-08-07 1996-08-06 METHOD FOR REPROCESSING OZONE-CONTAINING GAS IN A PLANT BLEACHING PLANT

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE69604809T Expired - Fee Related DE69604809T2 (en) 1995-08-07 1996-08-06 METHOD FOR REPROCESSING OZONE-CONTAINING GAS IN A PLANT BLEACHING PLANT

Country Status (10)

Country Link
EP (1) EP0843757B1 (en)
JP (1) JPH10510469A (en)
CN (1) CN1198786A (en)
AT (1) ATE185857T1 (en)
BR (1) BR9609907A (en)
CA (1) CA2229046A1 (en)
DE (2) DE843757T1 (en)
ES (1) ES2116952T3 (en)
PT (1) PT843757E (en)
WO (1) WO1997006305A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008105108A1 (en) 2007-02-27 2008-09-04 Shigenori Aono Process for production of bleached textile materials, equipment to be used in the process, and bleached textile materials obtained by the process
WO2008105132A1 (en) * 2007-02-27 2008-09-04 Shigenori Aono Process for producing bleached fiber product, apparatus for use therein, and thus obtained bleached fiber product
WO2008108506A1 (en) 2007-03-07 2008-09-12 Nihon Cellulose Co., Ltd. Method for treatment of black liquor containing no sulfide
FI20080008L (en) * 2008-01-08 2009-07-09 Andritz Oy Treatment of ozone-containing gas in connection with pulp bleaching

Family Cites Families (4)

* 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
CA2107764A1 (en) * 1992-03-02 1993-09-16 Lawrence A. Hinkey Combined ozone destruction and fiber scrubbing in paper pulp mills
CA2078276C (en) * 1992-09-15 2004-05-25 Derek Hornsey Recovery of oxygen-rich gas from ozone bleaching processes
US5403441A (en) * 1992-11-13 1995-04-04 Union Camp Patent Holding, Inc. Method for controlling an ozone bleaching process

Also Published As

Publication number Publication date
WO1997006305A1 (en) 1997-02-20
DE69604809T2 (en) 2000-05-11
PT843757E (en) 2000-04-28
ATE185857T1 (en) 1999-11-15
JPH10510469A (en) 1998-10-13
EP0843757B1 (en) 1999-10-20
EP0843757A1 (en) 1998-05-27
BR9609907A (en) 1999-03-30
ES2116952T1 (en) 1998-08-01
CA2229046A1 (en) 1997-02-20
DE69604809D1 (en) 1999-11-25
CN1198786A (en) 1998-11-11
ES2116952T3 (en) 2000-02-01

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