SE9901301L - Process and system for feeding of finely divided fiber material - Google Patents

Process and system for feeding of finely divided fiber material

Info

Publication number
SE9901301L
SE9901301L SE9901301A SE9901301A SE9901301L SE 9901301 L SE9901301 L SE 9901301L SE 9901301 A SE9901301 A SE 9901301A SE 9901301 A SE9901301 A SE 9901301A SE 9901301 L SE9901301 L SE 9901301L
Authority
SE
Sweden
Prior art keywords
pumps
slurry
treatment
treatment vessel
transfer device
Prior art date
Application number
SE9901301A
Other languages
Swedish (sv)
Other versions
SE530999C2 (en
SE9901301D0 (en
Inventor
C Bertil Stromberg
J Wayne Chamblee
Bruno S Marcoccia
Erwin D Funk
Rolf C Ryham
Original Assignee
Ahlstrom Machinery 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 US09/063,429 external-priority patent/US6106668A/en
Application filed by Ahlstrom Machinery Inc filed Critical Ahlstrom Machinery Inc
Publication of SE9901301D0 publication Critical patent/SE9901301D0/en
Publication of SE9901301L publication Critical patent/SE9901301L/en
Publication of SE530999C2 publication Critical patent/SE530999C2/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
    • 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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/22—Other features of pulping processes
    • D21C3/24—Continuous processes

Landscapes

  • Paper (AREA)

Abstract

A system and method for feeding comminuted cellulosic fibrous material such as wood chips to the top of a treatment vessel such as a continuous digester provide enhanced simplicity, operability, and maintainability by eliminating the high pressure transfer device conventionally used in the prior art. Instead of a high pressure transfer device the steamed and slurried chips are pressurized using one or more slurry pumps located at least thirty feet below the top of the treatment vessel and for pressurizing the slurry to a pressure of at least about 10 bar gauge. A return line from the top of the digester may, but need not necessarily, be operatively connected to the one or more pumps and if connected to the pumps the pressure in the return line may be reduced utilizing a pressure reduction valve and/or a flash tank. During pressurized transferring of the slurry from the pumps to a treatment vessel (which may be as little about 10 feet or as much as about a half a mile away) treatment liquid is provided which contains at least some active pumping chemical including sodium hydroxide, sodium sulfide; polysulfide, anthraquinone or their equivalents or derivatives; surfactants, enzymes, or chelants; or combinations thereof. Pseudo-countercurrent circulation of treatment liquids may be provided between stations.
SE9901301A 1998-04-21 1999-04-13 Process for treating finely divided fiber material when boiling pulp SE530999C2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/063,429 US6106668A (en) 1996-10-25 1998-04-21 Method for feeding comminuted fibrous material

Publications (3)

Publication Number Publication Date
SE9901301D0 SE9901301D0 (en) 1999-04-13
SE9901301L true SE9901301L (en) 1999-10-22
SE530999C2 SE530999C2 (en) 2008-11-11

Family

ID=22049131

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9901301A SE530999C2 (en) 1998-04-21 1999-04-13 Process for treating finely divided fiber material when boiling pulp

Country Status (4)

Country Link
JP (1) JP3496872B2 (en)
CA (1) CA2266987C (en)
FI (1) FI123098B (en)
SE (1) SE530999C2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE518957C2 (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
US7556713B2 (en) * 2004-06-22 2009-07-07 Andritz, Inc. Method and system for feeding cellulose chips to a high pressure continuous cooking system
JP5060791B2 (en) * 2007-01-26 2012-10-31 独立行政法人森林総合研究所 Method for drying wood, method for penetrating chemicals into wood and drying apparatus
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
JPH11323757A (en) 1999-11-26
SE530999C2 (en) 2008-11-11
FI990835A0 (en) 1999-04-15
CA2266987A1 (en) 1999-10-21
CA2266987C (en) 2004-02-10
FI123098B (en) 2012-11-15
FI990835A (en) 1999-10-22
JP3496872B2 (en) 2004-02-16
SE9901301D0 (en) 1999-04-13

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Legal Events

Date Code Title Description
NUG Patent has lapsed