EP0853699A1 - 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

Info

Publication number
EP0853699A1
EP0853699A1 EP96932919A EP96932919A EP0853699A1 EP 0853699 A1 EP0853699 A1 EP 0853699A1 EP 96932919 A EP96932919 A EP 96932919A EP 96932919 A EP96932919 A EP 96932919A EP 0853699 A1 EP0853699 A1 EP 0853699A1
Authority
EP
European Patent Office
Prior art keywords
zone
screw
section
dewatering
washing
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP96932919A
Other languages
German (de)
English (en)
Inventor
Torsten Lennart Berggren
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alfa Laval Celleco AB
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
Publication of EP0853699A1 publication Critical patent/EP0853699A1/fr
Withdrawn legal-status Critical Current

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)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (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.
EP96932919A 1995-10-02 1996-10-01 Appareil d'essorage, de pressurage et de lavage de la pate a papier Withdrawn EP0853699A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9503383 1995-10-02
SE9503383A SE504271C2 (sv) 1995-10-02 1995-10-02 Skruvpress med separat tvättzon för avvattning och tvättning av fibersuspensioner
PCT/SE1996/001226 WO1997013026A1 (fr) 1995-10-02 1996-10-01 Appareil d'essorage, de pressurage et de lavage de la pate a papier

Publications (1)

Publication Number Publication Date
EP0853699A1 true EP0853699A1 (fr) 1998-07-22

Family

ID=20399645

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96932919A Withdrawn EP0853699A1 (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)

Families Citing this family (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
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
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
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
WO2004080704A1 (fr) * 2003-03-14 2004-09-23 Atlas-Stord Denmark A/S Presse a vis comprenant une partie cylindrique
SE525565C2 (sv) * 2003-07-01 2005-03-08 Metso Paper Inc Förfarande och tvättpress för tvättning och avvattning av en fibersuspension
US7670459B2 (en) 2004-12-29 2010-03-02 Kimberly-Clark Worldwide, Inc. Soft and durable tissue products containing a softening agent
DE102007036377A1 (de) * 2007-07-31 2009-02-05 Voith Patent Gmbh Einsatz von Wasch- und Schneckenpressen für die Rohmaterial- und Faserstoffwäsche
GB2477805B (en) * 2010-02-16 2016-10-12 Hydro Int Plc A separator and components thereof
CN202685345U (zh) * 2012-08-03 2013-01-23 江门市贝尔斯顿电器有限公司 一种榨油机的压榨机构
SE541532C2 (en) * 2018-03-12 2019-10-29 Valmet Oy Arrangement and method for transporting pulp from one process stage to a subsequent process stage
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

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE371656B (fr) * 1973-04-05 1974-11-25 Wallen & Co Ab Lennart
NO154383C (no) * 1984-03-29 1986-09-10 Thune Eureka As Skruepresse.
US4915830A (en) * 1988-08-19 1990-04-10 Sprout-Bauer, Inc. Pulp wash press

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9713026A1 *

Also Published As

Publication number Publication date
JP2001503479A (ja) 2001-03-13
SE9503383L (sv) 1996-12-23
CA2230115A1 (fr) 1997-04-10
WO1997013026A1 (fr) 1997-04-10
SE9503383D0 (sv) 1995-10-02
SE504271C2 (sv) 1996-12-23

Similar Documents

Publication Publication Date Title
EP0853699A1 (fr) Appareil d'essorage, de pressurage et de lavage de la pate a papier
US4286512A (en) Screw-press
US3241676A (en) Dewatering method and apparatus
US6311849B1 (en) Device for dehydrating and washing suspensions of fibrous material
US5046338A (en) Multiphase pulp washer
US3616660A (en) Apparatus for washing fibrous material
US1505934A (en) Device for the continuous treatment of ligneous materials for their transformation in cellulose
US4215447A (en) Process and apparatus for washing fibre stock in the de-inking of paper
CA2231551C (fr) Apport de liquide de lavage dans un dispositif de lavage a fractionnement et a plusieurs etages
US4608122A (en) Method for washing a paper fiber on a belt washer using a sonic frequency disturbance
US4539827A (en) Belt washing improvements
DE69108917T3 (de) Dynamischer druckwäscher.
EP0302110A1 (fr) Procede de production de pate de cellulose et/ou de delignification de fibres secondaires
US5227075A (en) Process and apparatus for continuous filtering and liquid displacement of a liquid suspension of a fibrous or finely-divided material
US5538632A (en) Multiple filter dynamic washer
US3004876A (en) Method for washing fibrous material
US6086713A (en) Method of treating pulp
RU2099456C1 (ru) Способ получения волокнистой массы для производства бумаги, картона, древесноволокнистых плит и другой продукции, содержащей древесные и/или другие растительные волокна и устройства для осуществления способа
US20240167224A1 (en) Method and apparatus for treating mixtures of liquids and solids
Miliander 8 Pulp Washing
EP1805360B1 (fr) Appareil et procede de traitement de pate a papier
DE1767885C3 (de) Verfahren und Vorrichtung zur Behandlung von faserigem Cellulosestoff oder cellulosehaltigem Stoff
CA1088361A (fr) Melange et epaississement en plusieurs etapes de materiel fibreux lors du blanchiment a l'oxygene
SU1654401A1 (ru) Устройство дл обезвоживани и промывки волокнистой массы
CA2045418A1 (fr) Appareil de traitement de matieres solides en suspension

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19980302

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT DE FI FR GB IT

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20000503