NO952335L - Device and method for pulp bleaching - Google Patents

Device and method for pulp bleaching

Info

Publication number
NO952335L
NO952335L NO952335A NO952335A NO952335L NO 952335 L NO952335 L NO 952335L NO 952335 A NO952335 A NO 952335A NO 952335 A NO952335 A NO 952335A NO 952335 L NO952335 L NO 952335L
Authority
NO
Norway
Prior art keywords
chamber
mat
pulp
rollers
chemical
Prior art date
Application number
NO952335A
Other languages
Norwegian (no)
Other versions
NO952335D0 (en
Inventor
Oscar Luthi
Original Assignee
Ingersoll Rand Co
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 Ingersoll Rand Co filed Critical Ingersoll Rand Co
Publication of NO952335D0 publication Critical patent/NO952335D0/en
Publication of NO952335L publication Critical patent/NO952335L/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
    • 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
    • D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents
    • D21C9/06—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents in filters ; Washing of concentrated pulp, e.g. pulp mats, on filtering surfaces
    • 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
    • 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)

Abstract

En blekingsprosess og apparat for å produsere tremasse- matter med høy konsistens og med forholdsvis Jevn kjemikalie- og temperaturfordellng l massematten, benytter en vaskepresse (100) l hvilken matten tlldannes l et første kammer (I) mens en kjemikalie- oppløsnlng som først kan varmes opp eller avkjøles tilsettes et andre kammer (II). Lut-uttrekklng begynner l det første kammer (I ) og fortsetter gjennom det andre kammer (II) til nippet mellom valsene (62). For- trengnlngsvasklng av lut fra massematten begynner l overgangen mellom det første og andre kammer og fortsetter Inntil massematten entrer gapet mellom valsene. Med denne prosess utføres Justeringen av temperaturen og kjemikallelnneholdet på Jevn måte med et minimalt tap av energi eller materialer.A bleaching process and apparatus for producing high consistency wood pulp mats with relatively uniform chemical and temperature distribution in the pulp mat uses a washing press (100) in which the mat is formed in a first chamber (I) while a chemical solution which can first be heated up or cool a second chamber (II) is added. Lye extraction begins in the first chamber (I) and continues through the second chamber (II) to the nip between the rollers (62). Replacement of lye from the pulp mat begins in the transition between the first and second chambers and continues until the pulp mat enters the gap between the rollers. With this process, the adjustment of temperature and chemical content is carried out smoothly with minimal loss of energy or materials.

NO952335A 1992-12-18 1995-06-13 Device and method for pulp bleaching NO952335L (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US99332392A 1992-12-18 1992-12-18
PCT/US1993/012125 WO1994015016A1 (en) 1992-12-18 1993-12-10 Improved pulp bleaching apparatus and method

Publications (2)

Publication Number Publication Date
NO952335D0 NO952335D0 (en) 1995-06-13
NO952335L true NO952335L (en) 1995-06-13

Family

ID=25539384

Family Applications (1)

Application Number Title Priority Date Filing Date
NO952335A NO952335L (en) 1992-12-18 1995-06-13 Device and method for pulp bleaching

Country Status (7)

Country Link
EP (1) EP0674729A4 (en)
JP (1) JPH08504899A (en)
BR (1) BR9307672A (en)
CA (1) CA2151812A1 (en)
FI (1) FI952999A (en)
NO (1) NO952335L (en)
WO (1) WO1994015016A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE0802028A2 (en) * 2008-09-24 2010-07-20 Metso Paper Inc Apparatus for washing and / or dewatering pulp
US8828189B2 (en) 2012-01-30 2014-09-09 Andritz Inc. Washer press with multiple nips and multiple displacement wash zones
CN105178085A (en) * 2015-09-21 2015-12-23 潍坊恒联浆纸有限公司 Poplar pulp black liquor green extraction process

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE318182B (en) * 1968-04-23 1969-12-01 Karlstad Mekaniska Ab
US3772144A (en) * 1971-04-14 1973-11-13 Improved Machinery Inc Apparatus and method for thickening and washing suspensions containing fibrous material
US4310384A (en) * 1979-01-11 1982-01-12 Weyerhaeuser Company Reducing chemical transfer between treatment stages
US4269656A (en) * 1980-04-02 1981-05-26 Ingersoll-Rand Company Wood pulp forming system and method of recovering spent chemicals
JPS60121262A (en) * 1983-12-02 1985-06-28 Sumitomo Electric Ind Ltd Continuous hot dipping method

Also Published As

Publication number Publication date
JPH08504899A (en) 1996-05-28
WO1994015016A1 (en) 1994-07-07
EP0674729A1 (en) 1995-10-04
NO952335D0 (en) 1995-06-13
EP0674729A4 (en) 1997-06-18
FI952999A0 (en) 1995-06-16
FI952999A (en) 1995-06-16
CA2151812A1 (en) 1994-07-07
BR9307672A (en) 1999-09-08

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