FI914378A - IMPREGNERING MED SVARTLUT FOERE INFOERING AV VITLUT. - Google Patents

IMPREGNERING MED SVARTLUT FOERE INFOERING AV VITLUT. Download PDF

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Publication number
FI914378A
FI914378A FI914378A FI914378A FI914378A FI 914378 A FI914378 A FI 914378A FI 914378 A FI914378 A FI 914378A FI 914378 A FI914378 A FI 914378A FI 914378 A FI914378 A FI 914378A
Authority
FI
Finland
Prior art keywords
liquor
digester
chips
cooking
withdrawn
Prior art date
Application number
FI914378A
Other languages
Finnish (fi)
Other versions
FI914378A0 (en
FI103589B (en
FI103589B1 (en
Inventor
Johan C F C Richter
Original Assignee
Kamyr 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 Kamyr Ab filed Critical Kamyr Ab
Publication of FI914378A0 publication Critical patent/FI914378A0/en
Publication of FI914378A publication Critical patent/FI914378A/en
Application granted granted Critical
Publication of FI103589B publication Critical patent/FI103589B/en
Publication of FI103589B1 publication Critical patent/FI103589B1/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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
    • 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
    • D21C11/0021—Introduction of various effluents, e.g. waste waters, into the pulping, recovery and regeneration cycle (closed-cycle)
    • 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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/22—Other features of pulping processes
    • D21C3/24—Continuous processes

Landscapes

  • Inorganic Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Paper (AREA)
  • Alcoholic Beverages (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)
  • Plural Heterocyclic Compounds (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Soy Sauces And Products Related Thereto (AREA)
  • Bidet-Like Cleaning Device And Other Flush Toilet Accessories (AREA)
  • Toys (AREA)
  • Distillation Of Fermentation Liquor, Processing Of Alcohols, Vinegar And Beer (AREA)
  • Electroluminescent Light Sources (AREA)
  • Coloring (AREA)
  • Reinforced Plastic Materials (AREA)

Abstract

A method of continuously digesting comminuted cellulosic fibrous material (e.g. wood chips) is provided which simultaneously improves uniformity of the end product and has substantial energy economy. The chips are slurried, e.g. with black liquor, and fed to the top of a vertical digester. In the digester the chips are soaked in and heated with black liquor withdrawn from near the bottom of the cooking zone, which black liquor is at cooking temperature. White liquor (kraft cooking liquor) introduced into the cooking zone is preheated by passing it in heat exchange relationship with a portion of the black liquor withdrawn from the digester, so that only a small amount of heat in the form of steam need be added to the white liquor to bring it to cooking temperature. At the top of the digester, a portion of the liquid in the slurry can be withdrawn through a screen, pressurized, and then introduced under pressure with a downward velocity component facilitating a zone of concurrent movement of the chips and liquor.
FI914378A 1990-09-20 1991-09-18 Impregnation with black liquor before importing white liquor FI103589B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US58579090A 1990-09-20 1990-09-20
US58579090 1990-09-20

Publications (4)

Publication Number Publication Date
FI914378A0 FI914378A0 (en) 1991-09-18
FI914378A true FI914378A (en) 1992-03-21
FI103589B FI103589B (en) 1999-07-30
FI103589B1 FI103589B1 (en) 1999-07-30

Family

ID=24342973

Family Applications (1)

Application Number Title Priority Date Filing Date
FI914378A FI103589B1 (en) 1990-09-20 1991-09-18 Impregnation with black liquor before importing white liquor

Country Status (8)

Country Link
EP (1) EP0477059B1 (en)
JP (1) JP3126763B2 (en)
AT (1) ATE125010T1 (en)
BR (1) BR9104005A (en)
CA (1) CA2050818C (en)
DE (1) DE69111165T2 (en)
FI (1) FI103589B1 (en)
NO (1) NO913628L (en)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5489363A (en) * 1993-05-04 1996-02-06 Kamyr, Inc. Pulping with low dissolved solids for improved pulp strength
US5536366A (en) * 1993-05-04 1996-07-16 Ahlstrom Machinery Inc. Digester system for implementing low dissolved solids profiling
AU704580B2 (en) * 1993-05-04 1999-04-29 Kamyr Inc. Dissolved solids control in pulp protection
US5824187A (en) * 1993-12-29 1998-10-20 Kvaerner Pulping Ab Method for the continuous cooking of pulp
SE502039C2 (en) * 1993-12-29 1995-07-24 Kvaerner Pulping Tech Methods and apparatus for continuous cooking of pulp
US5660686A (en) * 1994-09-02 1997-08-26 Ahlstrom Machinery Inc. Cooking with spent liquor pretreatment of cellulose material
AU2697295A (en) * 1994-09-02 1996-03-27 Kamyr Inc. Continuous kraft cooking with black liquor pretreatment
SE502510C2 (en) * 1994-11-15 1995-11-06 Kvaerner Pulping Tech Black liquor impregnation in single boiler hydraulic boiler
US5925216A (en) * 1994-11-15 1999-07-20 Kvaerner Pulping Ab Method of continuous pulping in a digester with high black liquor usage in the impregnation stage
US6248208B1 (en) 1995-06-02 2001-06-19 Andritz-Ahlstrom Inc. Pretreatment of chips before cooking
US5635026A (en) * 1995-11-13 1997-06-03 Ahlstrom Machinery Inc. Cooking cellulose material with high alkali concentrations and/or high pH
SE506458C2 (en) 1996-02-09 1997-12-15 Kvaerner Pulping Tech Continuous boiling of cellulosic material with heat exchange between boiler extraction and circulating boiling liquid
US6159336A (en) * 1997-08-07 2000-12-12 Kvaerner Pulping Ab Method and device for the continuous cooking of pulp
US20010032711A1 (en) * 1998-10-26 2001-10-25 C. Bertil Stromberg Pulp cooking with particular alkali profiles
SE518993E (en) * 2002-01-24 2013-04-23 Metso Paper Sweden Ab Preparation of cellulose pulp by boiling with a boiling liquid containing evaporated black liquor
SE527058C2 (en) * 2004-02-09 2005-12-13 Kvaerner Pulping Tech Continuous cooking process with improved heat economy
US7556713B2 (en) * 2004-06-22 2009-07-07 Andritz, Inc. Method and system for feeding cellulose chips to a high pressure continuous cooking system
SE0602675L (en) * 2006-12-13 2007-09-18 Metso Fiber Karlstad Ab Method for energy efficient production of cellulose pulp in a continuous cookery
FI20090079A (en) 2009-03-05 2010-09-06 Andritz Inc Heat recovery from waste cooking liquor at a pulp mill digester
FI20105613A (en) * 2010-05-31 2011-12-01 Chempolis Oy Lignocellulosaprocess
FI129440B (en) * 2020-01-15 2022-02-28 Chempolis Oy Cooking equipment and method for treating biomass containing lignocellulose

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3303088A (en) * 1963-04-19 1967-02-07 Lummus Co Continuous liquid-phase rapid pulping
SE359331B (en) * 1970-03-17 1973-08-27 Kamyr Ab
CA2066181C (en) * 1989-09-28 1995-09-26 Karl-Eric Bertil Fagerlund Displacement heating in continuous digesters

Also Published As

Publication number Publication date
DE69111165T2 (en) 1995-11-16
NO913628D0 (en) 1991-09-13
CA2050818C (en) 2002-07-02
NO913628L (en) 1992-03-23
DE69111165D1 (en) 1995-08-17
EP0477059B1 (en) 1995-07-12
FI914378A0 (en) 1991-09-18
CA2050818A1 (en) 1992-03-21
JP3126763B2 (en) 2001-01-22
FI103589B (en) 1999-07-30
FI103589B1 (en) 1999-07-30
BR9104005A (en) 1992-05-26
JPH05132882A (en) 1993-05-28
EP0477059A2 (en) 1992-03-25
ATE125010T1 (en) 1995-07-15
EP0477059A3 (en) 1993-06-23

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Legal Events

Date Code Title Description
HC Name/ company changed in application

Owner name: KVAERNER PULPING TECHNOLOGIES AB

PC Transfer of assignment of patent

Owner name: METSO FIBER KARLSTAD AB

Free format text: METSO FIBER KARLSTAD AB

MA Patent expired