WO1997013026A1 - Appareil d'essorage, de pressurage et de lavage de la pate a papier - Google Patents

Appareil d'essorage, de pressurage et de lavage de la pate a papier Download PDF

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Publication number
WO1997013026A1
WO1997013026A1 PCT/SE1996/001226 SE9601226W WO9713026A1 WO 1997013026 A1 WO1997013026 A1 WO 1997013026A1 SE 9601226 W SE9601226 W SE 9601226W WO 9713026 A1 WO9713026 A1 WO 9713026A1
Authority
WO
WIPO (PCT)
Prior art keywords
zone
screw
section
dewatering
washing
Prior art date
Application number
PCT/SE1996/001226
Other languages
English (en)
Swedish (sv)
Inventor
Torsten Lennart Berggren
Original Assignee
Alfa Laval Celleco Ab
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 Alfa Laval Celleco Ab filed Critical Alfa Laval Celleco Ab
Priority to EP96932919A priority Critical patent/EP0853699A1/fr
Priority to JP51418897A priority patent/JP2001503479A/ja
Publication of WO1997013026A1 publication Critical patent/WO1997013026A1/fr

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
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/18—De-watering; Elimination of cooking or pulp-treating liquors from the pulp
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/117—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for outward flow filtration
    • B01D29/118—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for outward flow filtration open-ended
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
    • B01D29/6469—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers
    • B01D29/6476—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers with a rotary movement with respect to the filtering element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/76—Handling the filter cake in the filter for purposes other than for regenerating
    • B01D29/78—Handling the filter cake in the filter for purposes other than for regenerating for washing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/76—Handling the filter cake in the filter for purposes other than for regenerating
    • B01D29/80—Handling the filter cake in the filter for purposes other than for regenerating for drying
    • B01D29/82—Handling the filter cake in the filter for purposes other than for regenerating for drying by compression
    • B01D29/828—Handling the filter cake in the filter for purposes other than for regenerating for drying by compression using screws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B30B9/121—Screw constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/26—Permeable casings or strainers
    • 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
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/02—Filtering elements having a conical form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/28—Position of the filtering element
    • B01D2201/282—Filtering elements with a horizontal rotation or symmetry axis

Definitions

  • the present invention relates to an appararus for dewatering, pressing and washing treatment of material such as paper pulp etc.
  • Pulp factories uses washing of fiber pulp partly after the cooking pro ⁇ cess for washing out of cooking chemicals and dissolved organic substan ⁇ ces, partly between different stages in the bleach plant for washing out of reaction products and remaining chemicals.
  • the present-days in ⁇ creased claims for the environment and using of a closed process in the mill the claims for an effective washing of the pulp in increased too.
  • Presses are also used present-day for washing of pulp, and these installa ⁇ tions has increased considerably the last years. These types of presses works either as pure dewatering machines or they are equipped with an ex ⁇ tra device for adding of washwater.
  • the washing process is here consequen ⁇ tly carried out either merely by diluting/pressing or this in combination with displacement.
  • Presses works with incoming consistency for about 4 percent and outgoing consistency for about 30-35 percent. These figures means big advantages by using of presses in comparison with filters.Less circulating liquid quan ⁇ tity, less diluting of the pulp, less volume for the machine, higher was ⁇ hing out effect of the fiber pulp etc.
  • Screw presses as are used very much today for pure dewatering/squeezing of fiber pulp, are simple and cheap machines.
  • the problem is that we to ⁇ day have not an effective screw press construction with separate washing zone for adding of liquid for more effective washing process.
  • the object of the present invention is to produce a screw washing press where the advantages for the screw press construction itself is used and in cominatio ⁇ with an effective washing zone.
  • Incoming pulp suspension at consistency normally 4-10 percent is dewatered/squeezed in a first de- watering zone up to about 12-20 percent. After this washing liquid is ad- ded in a zone where the fiber pulp is allowed to expand. No dewatering exist in the washing zone but on the other hand an effective mixing to distribute the washing liquid in the fiber pulp.
  • the fiber pulp is once more comp ⁇ mated between a straight screen cylinder and a divergent core of the screw.
  • Throttle devise is used at the outlet of the cylinder to regulate the final dryness of the press ⁇ ed pulp.
  • Fig. 1 is a section through one embodiment of the invention.
  • the apparatus shown in fig. 1 includes an inlet section 1 for the pulp, a first dewatering zone 2, a washing section 3 for diluting/adding of wash ⁇ ing liquid, a final pressing zone and an outlet zone 5 for the washed and comp ⁇ mated pulp.
  • section 1 In the outer case 6 , formed like a through, is section 1 separated from section 2 by means of a wall 7, section 2 from section 3 by means of a wall 8, section 3 from section 4 by means of a wall 18 and section 4 from section 5 by means of a wall 9.
  • a press screw with divergent core 10 hav a length through all the embodi ⁇ ment and shaft journals have conventional bearings 13 and 14 (not showed).
  • On the journal 12 is placed a gear motor for drive of the screw.
  • zone 2 the converging screw flights 15 is surrounded by a screen cylin ⁇ der 16.
  • zone 3 are bars 17 welded on the screw core for an effective mixing of the fiber pulp with washing liquid 39 added through pipe 41 and screen holes 40.
  • zone 4 the cylindrical screw flights 19 are surronded by a screen basket 20.
  • the rear part of screen basket 20, zone 37, is not perforated.
  • In the forward part of the press screw 10 is also the core per ⁇ forated 22 for draining inwards of squeezed liquid.
  • a throttle devise 24 At the pulp outlet 23 is connected a throttle devise 24 and this can be regulated in horizontal direction.
  • the compressed pulp fall down through the outlet chamber 25.
  • the pulp is fed to the press through a pipe 26 and the squeeced liquid is drained out through pipes 27 and 28 and the squeezed liquid through holes 22 is drained out through the channel 29.
  • the apparatus operates in the following way.
  • the material to be dewatered and washed is fed from a pump or level box through a pipe 26 and further by the screw flight 15 in to the zone 2.
  • the pulp is here dewatered through compression and self draining.
  • the water is pressed through the holes 36 and further through pipe 27.
  • Thr compres ⁇ sing ratio counted as a flight volume 30/fl ⁇ ght volume 31 is in a magni ⁇ tude of 2,0:1 to 4,0:1, preferably 2,5:1 to 3,5:1.
  • At the putlet 38 from zone 2 has the pulp a possibility to expand at the same time as washing liquid is added through pipe 41 and screen holes 40.
  • the ratio of diame- ter 32/d ⁇ ameter 33 is in a magnitude of 1,1:2,5, preferably 1,5:2,0.
  • the bars 17 on the screw core 10 gives an effective mixing of the added liquid into the fiber pulp.
  • the screen basket 20 is not perforated.
  • the compression ratio counted as a flight volume 34/fl ⁇ ght volume 35 is in a magnitude of 2,0:1 to 4,Oil preferably 2,6:1 to 3,2:1.
  • the screw core 10 change from a diverging to a cynd ⁇ cal form.
  • the cyndrical part is perforated 22 for transport in ⁇ wards of the squeezed liquid.
  • a throttle devise 24 for a final regulating of the dryness of the pulp.
  • Through ho ⁇ les 21 squeezed water is distributed through pipe 28 and through holes 22 squeezed water through channel 29. The washed and compressed pulp fall down through the outlet chamber 25.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Abstract

Cette invention concerne un dispositif d'alimentation et d'essorage de la pâte à papier conçu pour essorer, pressurer et laver une pâte de cellulose. Ce dispositif comporte une première partie (1) permettant l'introduction de la pâte, une partie (2) conçue pour l'essorage ou le pressurage, une partie (3) permettant l'ajout de liquide détergent et le mélange avec ledit liquide, une partie (4) conçue pour l'essorage ou le pressurage final et enfin une partie (5) conçue pour l'evacuation de la matière traitée. L'essorage effectué dans la partie (2) se déroule entre un panier de tamisage convergent et un noyau de vis divergent, et l'essorage effectué dans la partie (4) se déroule entre un panier de tamisage cylindrique et un noyau de vis divergent.
PCT/SE1996/001226 1995-10-02 1996-10-01 Appareil d'essorage, de pressurage et de lavage de la pate a papier WO1997013026A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP96932919A EP0853699A1 (fr) 1995-10-02 1996-10-01 Appareil d'essorage, de pressurage et de lavage de la pate a papier
JP51418897A JP2001503479A (ja) 1995-10-02 1996-10-01 紙パルプの洗浄と組合せた脱水／圧搾装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9503383A SE504271C2 (sv) 1995-10-02 1995-10-02 Skruvpress med separat tvättzon för avvattning och tvättning av fibersuspensioner
SE9503383-3 1995-10-02

Publications (1)

Publication Number Publication Date
WO1997013026A1 true WO1997013026A1 (fr) 1997-04-10

Family

ID=20399645

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1996/001226 WO1997013026A1 (fr) 1995-10-02 1996-10-01 Appareil d'essorage, de pressurage et de lavage de la pate a papier

Country Status (5)

Country Link
EP (1) EP0853699A1 (fr)
JP (1) JP2001503479A (fr)
CA (1) CA2230115A1 (fr)
SE (1) SE504271C2 (fr)
WO (1) WO1997013026A1 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6423183B1 (en) 1997-12-24 2002-07-23 Kimberly-Clark Worldwide, Inc. Paper products and a method for applying a dye to cellulosic fibers
US6582560B2 (en) 2001-03-07 2003-06-24 Kimberly-Clark Worldwide, Inc. Method for using water insoluble chemical additives with pulp and products made by said method
US6749721B2 (en) 2000-12-22 2004-06-15 Kimberly-Clark Worldwide, Inc. Process for incorporating poorly substantive paper modifying agents into a paper sheet via wet end addition
WO2004080704A1 (fr) * 2003-03-14 2004-09-23 Atlas-Stord Denmark A/S Presse a vis comprenant une partie cylindrique
WO2005003448A1 (fr) * 2003-07-01 2005-01-13 Metso Paper, Inc. Procede et laveuse pour le lavage et l'essorage de fibres en suspension
WO2009015700A1 (fr) * 2007-07-31 2009-02-05 Voith Patent Gmbh Utilisation de presses de lavage et à vis pour le lavage d'une matière première et d'une matière fibreuse
US7670459B2 (en) 2004-12-29 2010-03-02 Kimberly-Clark Worldwide, Inc. Soft and durable tissue products containing a softening agent
US7749356B2 (en) 2001-03-07 2010-07-06 Kimberly-Clark Worldwide, Inc. Method for using water insoluble chemical additives with pulp and products made by said method
WO2011101656A1 (fr) * 2010-02-16 2011-08-25 Hydro International Plc Separateur et ses composants
WO2014019374A1 (fr) * 2012-08-03 2014-02-06 罗俊玉 Mécanisme de pressage de presse à huile
CN110075592A (zh) * 2019-05-31 2019-08-02 威海沁和实业有限公司 螺旋过滤洗涤机
WO2019177508A1 (fr) * 2018-03-12 2019-09-19 Valmet Ab Système et procédé permettant de transporter de la pâte d'une étape de traitement à une étape de traitement suivante

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3943033A (en) * 1973-04-05 1976-03-09 Lennart Wallen & Co Ab Screw thickener
NO154383B (no) * 1984-03-29 1986-06-02 Thune Eureka As Skruepresse.
US4915830A (en) * 1988-08-19 1990-04-10 Sprout-Bauer, Inc. Pulp wash press

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3943033A (en) * 1973-04-05 1976-03-09 Lennart Wallen & Co Ab Screw thickener
NO154383B (no) * 1984-03-29 1986-06-02 Thune Eureka As Skruepresse.
US4915830A (en) * 1988-08-19 1990-04-10 Sprout-Bauer, Inc. Pulp wash press

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6423183B1 (en) 1997-12-24 2002-07-23 Kimberly-Clark Worldwide, Inc. Paper products and a method for applying a dye to cellulosic fibers
US7678232B2 (en) 2000-12-22 2010-03-16 Kimberly-Clark Worldwide, Inc. Process for incorporating poorly substantive paper modifying agents into a paper sheet via wet end addition
US6749721B2 (en) 2000-12-22 2004-06-15 Kimberly-Clark Worldwide, Inc. Process for incorporating poorly substantive paper modifying agents into a paper sheet via wet end addition
US6582560B2 (en) 2001-03-07 2003-06-24 Kimberly-Clark Worldwide, Inc. Method for using water insoluble chemical additives with pulp and products made by said method
US7993490B2 (en) 2001-03-07 2011-08-09 Kimberly-Clark Worldwide, Inc. Method for applying chemical additives to pulp during the pulp processing and products made by said method
US7749356B2 (en) 2001-03-07 2010-07-06 Kimberly-Clark Worldwide, Inc. Method for using water insoluble chemical additives with pulp and products made by said method
WO2004080704A1 (fr) * 2003-03-14 2004-09-23 Atlas-Stord Denmark A/S Presse a vis comprenant une partie cylindrique
WO2005003448A1 (fr) * 2003-07-01 2005-01-13 Metso Paper, Inc. Procede et laveuse pour le lavage et l'essorage de fibres en suspension
US7670459B2 (en) 2004-12-29 2010-03-02 Kimberly-Clark Worldwide, Inc. Soft and durable tissue products containing a softening agent
WO2009015700A1 (fr) * 2007-07-31 2009-02-05 Voith Patent Gmbh Utilisation de presses de lavage et à vis pour le lavage d'une matière première et d'une matière fibreuse
WO2011101656A1 (fr) * 2010-02-16 2011-08-25 Hydro International Plc Separateur et ses composants
WO2014019374A1 (fr) * 2012-08-03 2014-02-06 罗俊玉 Mécanisme de pressage de presse à huile
WO2019177508A1 (fr) * 2018-03-12 2019-09-19 Valmet Ab Système et procédé permettant de transporter de la pâte d'une étape de traitement à une étape de traitement suivante
CN110075592A (zh) * 2019-05-31 2019-08-02 威海沁和实业有限公司 螺旋过滤洗涤机

Also Published As

Publication number Publication date
SE9503383D0 (sv) 1995-10-02
JP2001503479A (ja) 2001-03-13
CA2230115A1 (fr) 1997-04-10
EP0853699A1 (fr) 1998-07-22
SE9503383L (sv) 1996-12-23
SE504271C2 (sv) 1996-12-23

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