ZA98936B - Method and device for the continuous cooking of pulp - Google Patents

Method and device for the continuous cooking of pulp

Info

Publication number
ZA98936B
ZA98936B ZA98936A ZA98936A ZA98936B ZA 98936 B ZA98936 B ZA 98936B ZA 98936 A ZA98936 A ZA 98936A ZA 98936 A ZA98936 A ZA 98936A ZA 98936 B ZA98936 B ZA 98936B
Authority
ZA
South Africa
Prior art keywords
con
cooking
zone
current
fibre material
Prior art date
Application number
ZA98936A
Inventor
Johan Engstrom
Vidar Snekkenes
Krister Olsson
Soren Gustavsson
Christoffer Lindgren
Mikael Lindstrom
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=20405502&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ZA98936(B) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Kvaerner Pulping Tech filed Critical Kvaerner Pulping Tech
Publication of ZA98936B publication Critical patent/ZA98936B/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
    • 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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/22—Other features of pulping processes
    • D21C3/24—Continuous processes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)
  • General Preparation And Processing Of Foods (AREA)

Abstract

This invention relates to a new and improved way of continuously cooking fibre material, wherein temperatures and alkaline levels are controlled to be maintained within specific levels in different zones of the digesting process in order to optimise chemical consumption and heat-economy and at the same time achieve very good pulp properties. The fibre material is heated and impregnated by the aid of black liquor to a temperature less than 140 DEG C and passed in con-current in an impregnation zone (A). The heated and impregnated fibre material is transferred to a con-current cooking zone (B) in the upper part of a digester (6). At least 60 % of the quantity of liquor (F) required for the cooking reaction is supplied in the up-stream end of the con-current cooking zone (B) in order to obtain a level of effective alkali exceeding 35 g/l. The cooking temperature in the con-current cooking zone (B) is lower than 160 DEG C. Spent liquor (E), with an amount of effective alkali of at least 13 g/l, is withdrawn from a strainer girdle (8). A substantial part of the spent liquor is supplied to the impregnation zone.
ZA98936A 1997-02-09 1998-02-05 Method and device for the continuous cooking of pulp ZA98936B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SE1997/000192 WO1998035090A1 (en) 1997-02-09 1997-02-09 Continuous method for producing pulp with spent liquor impregnation

Publications (1)

Publication Number Publication Date
ZA98936B true ZA98936B (en) 1998-09-23

Family

ID=20405502

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA98936A ZA98936B (en) 1997-02-09 1998-02-05 Method and device for the continuous cooking of pulp

Country Status (8)

Country Link
EP (1) EP0909353B1 (en)
AT (1) ATE201064T1 (en)
AU (1) AU2183697A (en)
CA (1) CA2279283C (en)
DE (1) DE69800767T2 (en)
ES (1) ES2159175T3 (en)
WO (1) WO1998035090A1 (en)
ZA (1) ZA98936B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1318688C (en) * 2003-08-26 2007-05-30 山东泉林纸业有限责任公司 Impregnation pretreatment technology of raw material used in soda process pulp making
SE527058C2 (en) * 2004-02-09 2005-12-13 Kvaerner Pulping Tech Continuous cooking process with improved heat economy
SE533670C2 (en) * 2009-04-01 2010-11-30 Metso Fiber Karlstad Ab System and method for controlling a continuous steam phase boiler
CN103215834B (en) * 2013-04-17 2015-01-07 岳阳林纸股份有限公司 Energy-saving environment-friendly continuous cooking process
RU2670855C1 (en) * 2017-06-26 2018-10-25 Федеральное государственное бюджетное образовательное учреждение высшего образования "Санкт-Петербургский государственный университет промышленных технологий и дизайна" Method of the process wooden chips boiling in the cellulose manufacturing

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2639987A (en) * 1947-07-09 1953-05-26 Ass Pulp & Paper Mills Two-stage pulping process
FI82079C (en) * 1989-04-27 1993-05-11 Poeyry Jaakko & Co Oy Foerfarande och anordning Foer kontinuerlig kokning av Cellulosa
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
US5635026A (en) * 1995-11-13 1997-06-03 Ahlstrom Machinery Inc. Cooking cellulose material with high alkali concentrations and/or high pH

Also Published As

Publication number Publication date
EP0909353B1 (en) 2001-05-09
CA2279283A1 (en) 1998-08-13
ATE201064T1 (en) 2001-05-15
EP0909353A1 (en) 1999-04-21
CA2279283C (en) 2008-08-26
DE69800767T2 (en) 2001-11-29
WO1998035090A1 (en) 1998-08-13
ES2159175T3 (en) 2001-09-16
AU2183697A (en) 1998-08-26
DE69800767D1 (en) 2001-06-13

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