CA2277931A1 - Method and device for the continuous cooking of chemical pulp - Google Patents

Method and device for the continuous cooking of chemical pulp Download PDF

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Publication number
CA2277931A1
CA2277931A1 CA002277931A CA2277931A CA2277931A1 CA 2277931 A1 CA2277931 A1 CA 2277931A1 CA 002277931 A CA002277931 A CA 002277931A CA 2277931 A CA2277931 A CA 2277931A CA 2277931 A1 CA2277931 A1 CA 2277931A1
Authority
CA
Canada
Prior art keywords
chips
liquid
digester
impregnation
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
CA002277931A
Other languages
French (fr)
Other versions
CA2277931C (en
Inventor
Vidar Snekkenes
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.)
Valmet 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
Priority claimed from SE9700435A external-priority patent/SE511850C2/en
Priority claimed from US08/908,285 external-priority patent/US6123807A/en
Priority claimed from US08/960,012 external-priority patent/US6159336A/en
Application filed by Individual filed Critical Individual
Publication of CA2277931A1 publication Critical patent/CA2277931A1/en
Application granted granted Critical
Publication of CA2277931C publication Critical patent/CA2277931C/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
    • D21C1/00—Pretreatment of the finely-divided materials before digesting
    • 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
    • D21C7/00—Digesters
    • D21C7/06—Feeding devices
    • 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
    • D21C7/00—Digesters
    • D21C7/14—Means for circulating the lye

Abstract

A method in connection with continuous cooking of chips, comprising impregnation of the chips with impregnation liquid in an impregnation vessel (3) and cooking of the impregnated chips in a digester (4), the impregnation vessel and the digester being connected to each other by means of a transfer circulation, which partly, via a feed line (25), feeds the chips from an outlet end (27) of the impregnation vessel to the top of the digester for separation of free liquid in a separator (28), and partly, via a return line (26), feeds separated liquid from the top of the digester to the outlet end of the impregnation vessel for use as transfer liquid for the impregnated chips, besides which cooking liquid is added to the chips in the top of the digester. According to the invention, as a first part, less than 100 %, preferably less than 95 % and more preferred less than 90 % of the liquid which is separated from the chips in the transfer circulation, is recirculated to be used as transfer liquid.
CA002277931A 1997-02-10 1998-02-09 Method and device for the continuous cooking of chemical pulp Expired - Lifetime CA2277931C (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
SE9700435-2 1997-02-10
SE9700435A SE511850C2 (en) 1997-02-10 1997-02-10 Methods and plant for continuous cooking of fiber material
US08/908,285 US6123807A (en) 1997-02-18 1997-08-07 Method for the continuous cooking of pulp
US08/908,285 1997-08-07
US08/960,012 1997-10-29
US08/960,012 US6159336A (en) 1997-08-07 1997-10-29 Method and device for the continuous cooking of pulp
PCT/SE1998/000224 WO1998035092A1 (en) 1997-02-10 1998-02-09 Method and device for the continuous cooking of chemical pulp

Publications (2)

Publication Number Publication Date
CA2277931A1 true CA2277931A1 (en) 1998-08-13
CA2277931C CA2277931C (en) 2006-11-07

Family

ID=27355857

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002277931A Expired - Lifetime CA2277931C (en) 1997-02-10 1998-02-09 Method and device for the continuous cooking of chemical pulp

Country Status (6)

Country Link
EP (1) EP0963480B1 (en)
AT (1) ATE333532T1 (en)
AU (1) AU6233398A (en)
CA (1) CA2277931C (en)
DE (1) DE69835277D1 (en)
WO (1) WO1998035092A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE0602675L (en) * 2006-12-13 2007-09-18 Metso Fiber Karlstad Ab Method for energy efficient production of cellulose pulp in a continuous cookery
WO2012060749A1 (en) * 2010-11-03 2012-05-10 Metso Paper Sweden Ab Top separator for steam/liquid digester
WO2014004844A1 (en) * 2012-06-28 2014-01-03 Shell Oil Company Digestion units configured for high yield biomass processing

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE330819B (en) * 1966-09-12 1970-11-30 Kamyr Ab
FI82079C (en) * 1989-04-27 1993-05-11 Poeyry Jaakko & Co Oy Foerfarande och anordning Foer kontinuerlig kokning av Cellulosa
US5401361A (en) * 1992-08-19 1995-03-28 Kamyr, Inc. Completely coutercurrent cook continuous digester
US5413677A (en) * 1993-04-05 1995-05-09 Kamyr, Inc. Method for producing chemical pulp from hardwood chips
SE502134C2 (en) * 1994-02-10 1995-08-28 Kvaerner Pulping Tech Optimization of liquid / wood ratio in pre-impregnation vessels and continuous boiler in preparation of chemical pulp

Also Published As

Publication number Publication date
WO1998035092A1 (en) 1998-08-13
ATE333532T1 (en) 2006-08-15
CA2277931C (en) 2006-11-07
AU6233398A (en) 1998-08-26
EP0963480B1 (en) 2006-07-19
EP0963480A1 (en) 1999-12-15
DE69835277D1 (en) 2006-08-31

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Effective date: 20180209