SE0101554L - Removal of metal from comminuted cellulosic fibrous material during feeding - Google Patents

Removal of metal from comminuted cellulosic fibrous material during feeding

Info

Publication number
SE0101554L
SE0101554L SE0101554A SE0101554A SE0101554L SE 0101554 L SE0101554 L SE 0101554L SE 0101554 A SE0101554 A SE 0101554A SE 0101554 A SE0101554 A SE 0101554A SE 0101554 L SE0101554 L SE 0101554L
Authority
SE
Sweden
Prior art keywords
fibrous material
cellulosic fibrous
removal
comminuted cellulosic
metal
Prior art date
Application number
SE0101554A
Other languages
Swedish (sv)
Other versions
SE0101554D0 (en
Inventor
C Bertil Stroemberg
Original Assignee
Andritz Ahlstrom Inc
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 US09/568,962 external-priority patent/US6336993B1/en
Application filed by Andritz Ahlstrom Inc filed Critical Andritz Ahlstrom Inc
Publication of SE0101554D0 publication Critical patent/SE0101554D0/en
Publication of SE0101554L publication Critical patent/SE0101554L/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
    • D21C1/00—Pretreatment of the finely-divided materials before digesting
    • D21C1/04—Pretreatment of the finely-divided materials before digesting with acid reacting compounds
    • 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

Landscapes

  • Paper (AREA)

Abstract

A system and method for feeding a slurry of comminuted cellulosic fibrous material such as wood chips to the top of a treatment vessel such as a continuous digester also treat the material to remove metals before digestion. During pumping of the slurry with at least first and second series connected pumps, at or upstream of at least one of the pumps chemicals (acids and/or chelating agents) which dissolve the metals in the material are added, and preferably some of the liquid is removed so as to purge at least about 10% (e.g. about 20-80%) of the metals in the material. The metal removal preferably takes place substantially immediately before alkaline digestion.
SE0101554A 2000-05-11 2001-05-04 Removal of metal from comminuted cellulosic fibrous material during feeding SE0101554L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/568,962 US6336993B1 (en) 1996-10-25 2000-05-11 Metal removal from comminuted fibrous material during feeding

Publications (2)

Publication Number Publication Date
SE0101554D0 SE0101554D0 (en) 2001-05-04
SE0101554L true SE0101554L (en) 2001-11-12

Family

ID=24273489

Family Applications (1)

Application Number Title Priority Date Filing Date
SE0101554A SE0101554L (en) 2000-05-11 2001-05-04 Removal of metal from comminuted cellulosic fibrous material during feeding

Country Status (4)

Country Link
JP (1) JP2001316992A (en)
CA (1) CA2345759A1 (en)
FI (1) FI20010854A (en)
SE (1) SE0101554L (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE0200185L (en) * 2002-01-24 2002-12-10 Kvaerner Pulping Tech Process for increasing the heating economy of the boiler system during continuous boiling
CA2455172C (en) * 2003-01-30 2010-02-23 Andritz Inc. Feeding comminuted fibrous material using high pressure screw and centrifugal pumps
JP5114629B2 (en) * 2008-02-06 2013-01-09 サンノプコ株式会社 Cooking aid for cooking lignocellulosic material and method for producing pulp
SE542430C2 (en) * 2017-09-19 2020-04-28 Domsjoe Fabriker Ab Removal of inorganic elements from wood chips
SE543151C2 (en) * 2018-07-02 2020-10-13 Valmet Oy Feeding system and method for feeding comminuted cellulosic material to a high-pressure treatment zone
FI129118B (en) * 2018-10-03 2021-07-30 Andritz Oy Method of feeding wood chips to a pre-hydrolysis reactor

Also Published As

Publication number Publication date
FI20010854A0 (en) 2001-04-24
FI20010854A (en) 2001-11-12
JP2001316992A (en) 2001-11-16
CA2345759A1 (en) 2001-11-11
SE0101554D0 (en) 2001-05-04

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Legal Events

Date Code Title Description
NAV Patent application has lapsed