CA2050818A1 - Impregnation with black liquor prior to white liquor introduction - Google Patents

Impregnation with black liquor prior to white liquor introduction

Info

Publication number
CA2050818A1
CA2050818A1 CA002050818A CA2050818A CA2050818A1 CA 2050818 A1 CA2050818 A1 CA 2050818A1 CA 002050818 A CA002050818 A CA 002050818A CA 2050818 A CA2050818 A CA 2050818A CA 2050818 A1 CA2050818 A1 CA 2050818A1
Authority
CA
Canada
Prior art keywords
liquor
digester
chips
black liquor
cooking
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.)
Granted
Application number
CA002050818A
Other languages
French (fr)
Other versions
CA2050818C (en
Inventor
Johan C. F. C. Richter
Ole J. Richter
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.)
Metso Fiber Karlstad AB
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2050818A1 publication Critical patent/CA2050818A1/en
Application granted granted Critical
Publication of CA2050818C publication Critical patent/CA2050818C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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)
  • Toys (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)
  • Bidet-Like Cleaning Device And Other Flush Toilet Accessories (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Soy Sauces And Products Related Thereto (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Plural Heterocyclic Compounds (AREA)
  • Reinforced Plastic Materials (AREA)
  • Coloring (AREA)
  • Distillation Of Fermentation Liquor, Processing Of Alcohols, Vinegar And Beer (AREA)
  • Electroluminescent Light Sources (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.
CA002050818A 1990-09-20 1991-09-06 Impregnation with black liquor prior to white liquor introduction Expired - Lifetime CA2050818C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US58579090A 1990-09-20 1990-09-20
US585,790 1990-09-20

Publications (2)

Publication Number Publication Date
CA2050818A1 true CA2050818A1 (en) 1992-03-21
CA2050818C CA2050818C (en) 2002-07-02

Family

ID=24342973

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002050818A Expired - Lifetime CA2050818C (en) 1990-09-20 1991-09-06 Impregnation with black liquor prior to white liquor introduction

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
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
US5489363A (en) * 1993-05-04 1996-02-06 Kamyr, Inc. Pulping with low dissolved solids for improved pulp strength
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
AU2697295A (en) * 1994-09-02 1996-03-27 Kamyr Inc. Continuous kraft cooking with black liquor pretreatment
US5660686A (en) * 1994-09-02 1997-08-26 Ahlstrom Machinery Inc. Cooking with spent liquor pretreatment of cellulose material
SE9403978L (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
KR0171423B1 (en) * 1989-09-28 1999-05-01 더크 제이. 빈맨 Substitution heating apparatus and method in continuous immersion

Also Published As

Publication number Publication date
JPH05132882A (en) 1993-05-28
FI914378A0 (en) 1991-09-18
NO913628L (en) 1992-03-23
EP0477059A3 (en) 1993-06-23
JP3126763B2 (en) 2001-01-22
DE69111165T2 (en) 1995-11-16
FI103589B (en) 1999-07-30
ATE125010T1 (en) 1995-07-15
EP0477059B1 (en) 1995-07-12
DE69111165D1 (en) 1995-08-17
NO913628D0 (en) 1991-09-13
EP0477059A2 (en) 1992-03-25
BR9104005A (en) 1992-05-26
FI103589B1 (en) 1999-07-30
FI914378A (en) 1992-03-21
CA2050818C (en) 2002-07-02

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