SE9502573L - Liquid circulation in a vessel for impregnation of chips - Google Patents

Liquid circulation in a vessel for impregnation of chips

Info

Publication number
SE9502573L
SE9502573L SE9502573A SE9502573A SE9502573L SE 9502573 L SE9502573 L SE 9502573L SE 9502573 A SE9502573 A SE 9502573A SE 9502573 A SE9502573 A SE 9502573A SE 9502573 L SE9502573 L SE 9502573L
Authority
SE
Sweden
Prior art keywords
liquid
vessel
impregnation
countercurrent
site
Prior art date
Application number
SE9502573A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE9502573D0 (en
SE504644C2 (en
Inventor
Lennart Sjoelund
Original Assignee
Kvaerner Pulping Tech
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 Kvaerner Pulping Tech filed Critical Kvaerner Pulping Tech
Priority to SE9502573A priority Critical patent/SE504644C2/en
Publication of SE9502573D0 publication Critical patent/SE9502573D0/en
Priority to PCT/SE1996/000808 priority patent/WO1997003243A1/en
Publication of SE9502573L publication Critical patent/SE9502573L/en
Publication of SE504644C2 publication Critical patent/SE504644C2/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
    • D21C3/22—Other features of pulping processes
    • D21C3/24—Continuous 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
    • D21C1/00—Pretreatment of the finely-divided materials before digesting
    • D21C1/06—Pretreatment of the finely-divided materials before digesting with alkaline reacting compounds

Landscapes

  • Paper (AREA)
  • Soy Sauces And Products Related Thereto (AREA)

Abstract

Method of cooking chips, which are impregnated with liquid in a vessel (3) in a cocurrent impregnation zone (A) and a subsequent countercurrent impregnation zone (B), whereby impregnation liquid is supplied in a mixture together with steamed chips through a feeding system, to the vessel (3), and liquid for recovery is extracted at a first site (41), situated in the lower part of the cocurrent impregnation zone, and additional liquid is supplied to the countercurrent impregnation zone. According to the invention is also liquid extracted at a second site (43), situated in the upper part of the countercurrent impregnation zone, and is caused to circulate in an impregnation circulation (44, 45), which opens out in the centre of the vessel (3) at a site located downstreams of the said first site (41) for extracting liquid for recovery, so that a flow of liquid is created from the centre of the vessel (3) in a direction which is radial. A first fraction of the said additional liquid is supplied in the lower part of the countercurrent impregnation zone in order to establish a countercurrent in the direction towards said first extraction site, and a second fraction is supplied to the said impregnation circulation. The said first fraction is maximized so that the movement of the chips downwards in the vessel is ensured.
SE9502573A 1995-07-12 1995-07-12 Liquid circulation in a vessel for impregnation of chips SE504644C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE9502573A SE504644C2 (en) 1995-07-12 1995-07-12 Liquid circulation in a vessel for impregnation of chips
PCT/SE1996/000808 WO1997003243A1 (en) 1995-07-12 1996-06-20 Impregnation of fibre material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9502573A SE504644C2 (en) 1995-07-12 1995-07-12 Liquid circulation in a vessel for impregnation of chips

Publications (3)

Publication Number Publication Date
SE9502573D0 SE9502573D0 (en) 1995-07-12
SE9502573L true SE9502573L (en) 1997-01-13
SE504644C2 SE504644C2 (en) 1997-03-24

Family

ID=20398967

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9502573A SE504644C2 (en) 1995-07-12 1995-07-12 Liquid circulation in a vessel for impregnation of chips

Country Status (2)

Country Link
SE (1) SE504644C2 (en)
WO (1) WO1997003243A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2294186C (en) 1997-06-25 2005-04-26 Kvaerner Pulping Ab Method in connection with the pretreatment of comminuted fibrous material
SE530744C2 (en) 2007-02-23 2008-09-02 Metso Fiber Karlstad Ab Steam phase boilers and a procedure for continuous boiling

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE359331B (en) * 1970-03-17 1973-08-27 Kamyr Ab
SE468053B (en) * 1988-12-20 1992-10-26 Kamyr Ab SET ON CONTINUOUS DISSOLUTION COOKING OF CELLULOSIC FIBER MATERIAL
US5660686A (en) * 1994-09-02 1997-08-26 Ahlstrom Machinery Inc. Cooking with spent liquor pretreatment of cellulose material

Also Published As

Publication number Publication date
SE9502573D0 (en) 1995-07-12
SE504644C2 (en) 1997-03-24
WO1997003243A1 (en) 1997-01-30

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Legal Events

Date Code Title Description
NUG Patent has lapsed