EP0721526B1 - Procede et appareil d'essorage d'une suspension de fibres - Google Patents

Procede et appareil d'essorage d'une suspension de fibres Download PDF

Info

Publication number
EP0721526B1
EP0721526B1 EP94929079A EP94929079A EP0721526B1 EP 0721526 B1 EP0721526 B1 EP 0721526B1 EP 94929079 A EP94929079 A EP 94929079A EP 94929079 A EP94929079 A EP 94929079A EP 0721526 B1 EP0721526 B1 EP 0721526B1
Authority
EP
European Patent Office
Prior art keywords
dewatering apparatus
fractionator
outlet
fraction
suspension
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.)
Expired - Lifetime
Application number
EP94929079A
Other languages
German (de)
English (en)
Other versions
EP0721526A1 (fr
Inventor
Kent Strid
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.)
Kvaerner Pulping AS
Original Assignee
Kvaerner Pulping AS
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 Kvaerner Pulping AS filed Critical Kvaerner Pulping AS
Publication of EP0721526A1 publication Critical patent/EP0721526A1/fr
Application granted granted Critical
Publication of EP0721526B1 publication Critical patent/EP0721526B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • D21D1/40—Washing the fibres
    • 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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water

Definitions

  • the present invention concers a method and an apparatus for the conversion of a fibre suspension and particularly for increasing the output of a dewatering apparatus especially for recycled fibre pulp.
  • the present invention concerns a method according to claim 1 and an apparatus according to claim 2.
  • an alternative method is proposed, wherein the filtrate from a dewatering apparatus is treated in a fractionator, where fractioning takes place in liquid, and wherein the fractions from the fractionator are selectively introduced into the dewatered fraction flow from the dewatering apparatus.
  • this can be accomplished in that a fractionator, wherein fractioning takes place in liquid, is connected to a filtrate outlet of a dewatering apparatus, and that fraction outlets of the fractionator lead to a dewatered fraction outlet of the dewatering apparatus.
  • 1 designates any dewatering apparatus, herein shown as a so-called thin film washer of the kind described in Swedish Patent Application No. 9303192-0, filed September 30, 1994 and entitled "Apparatus for washing of fibre suspension”.
  • Diluted recycled fibre pulp (about 1%) is introduced therein through an inlet 2.
  • Water is pressed out of the pulp through a perforated drum 3, and the dewatered pulp (about 8%) is removed from the drum by means of a roller 4 and a scraper 5 and is discharged through an outlet conduit 6.
  • the pressed out water which contains long fibres, fines as well as fillers, is discharged from a container 7 through an outlet 8.
  • a fractionator 10 fractioning in liquid i.e., an apparatus utilizing the fluid flow phenomenon resulting in that larger particles in a flowing liquid are displaced forwardly in the direction of flow, whereas smaller particles are displaced relatively seen backwards in the direction of flow.
  • a flowing plug of, for instance, a suspension there is formed in a flowing plug of, for instance, a suspension, a fractioning in a diminishing particle size from the front and backwards in the plug.
  • the fractionator shown is of the kind described in Swedish Patent Application No. 9303193-8, filed September 30, 1994 and entitled "Fractionator".
  • Such a fractionator is provided with a rotatable cylindrical drum 11, within which are provided a plurality of cylinders 12, 13, 14, 15 and 16 concentric to the drum.
  • Every second such cylinder is tightly connected in its one end to one end wall of the drum, while flow can take place between the other end of the cylinder and the opposite end wall of the drum.
  • the outlets 18, 19 and 20 are connected to outlet conduits 21, 22, 23, respectively, which in turn and in a non-shown manner are connected to the outlet conduit 6 of the dewatering apparatus.
  • the outlet conduits lead to non-shown tanks for the different fractions, wherefrom the fractions may be selectively introduced into the outlet conduit 6 of the dewatering apparatus in order to re-introduce into the concentrated pulp flow present in the outlet conduit 6 selected amounts of selected fractions from the fractionator.
  • the fraction or fractions to be introduced into the outlet conduit 6, as well as the amounts thereof, are determined by sensing the quality of the pulp at the inlet 2 of the dewatering apparatus and/or its outlet 6.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Drying Of Solid Materials (AREA)
  • Treatment Of Liquids With Adsorbents In General (AREA)

Claims (2)

  1. Procédé pour augmenter le rendement d'un appareil d'essorage pour une suspension de fibres, particulièrement pour de la pâte de fibres recyclées, dans lequel une suspension de fibres est traitée dans un appareil d'essorage pour obtenir un filtrat et une fraction essorée, caractérisé en ce que le filtrat provenant de l'appareil d'essorage est dirigé jusqu'à un appareil de fractionnement, où un fractionnement a lieu dans un liquide, et en ce que des fractions provenant de l'appareil de fractionnement sont introduites sélectivement dans un flux de fraction essorée provenant de l'appareil d'essorage selon la qualité déterminée dudit flux de pâte.
  2. Appareil pour augmenter le rendement d'un appareil d'essorage pour une suspension de fibres, particulièrement pour de la pâte de fibres recyclées, comprenant un appareil d'essorage (1) comportant une entrée de suspension (2), une sortie de filtrat (8) et une sortie de fraction essorée (6), caractérisé en ce que la sortie de filtrat (8) de l'appareil d'essorage (1) est reliée à l'entrée de filtrat (9) d'un appareil de fractionnement (10) comportant une pluralité de sorties de fractions (18, 19, 20), qui est du type où le fractionnement a lieu dans un liquide, et en ce que les sorties de fractions (18, 19, 20) de l'appareil de fractionnement sont reliées à la sortie de fraction essorée (6) de l'appareil d'essorage (1), un moyen de détection étant prévu pour détecter la qualité de la suspension à l'entrée de suspension (2) et/ou la sortie de fraction essorée (6) de l'appareil d'essorage, et un moyen de contrôle étant prévu entre les sorties de fractions (18, 19, 20) de l'appareil de fractionnement et la sortie de fraction essorée (6) de l'appareil d'essorage pour contrôler la distribution de fractions à la sortie de fraction essorée (6) selon la qualité de la suspension détectée par ledit moyen de détection.
EP94929079A 1993-09-30 1994-09-29 Procede et appareil d'essorage d'une suspension de fibres Expired - Lifetime EP0721526B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9303194 1993-09-30
SE9303194A SE501772C2 (sv) 1993-09-30 1993-09-30 Förfarande och anordning för att öka utbytet vid avvattning av en fibersuspension
PCT/SE1994/000899 WO1995009268A1 (fr) 1993-09-30 1994-09-29 Procede et appareil d'essorage d'une suspension de fibres

Publications (2)

Publication Number Publication Date
EP0721526A1 EP0721526A1 (fr) 1996-07-17
EP0721526B1 true EP0721526B1 (fr) 1998-12-02

Family

ID=20391269

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94929079A Expired - Lifetime EP0721526B1 (fr) 1993-09-30 1994-09-29 Procede et appareil d'essorage d'une suspension de fibres

Country Status (11)

Country Link
EP (1) EP0721526B1 (fr)
JP (1) JPH09505641A (fr)
AT (1) ATE173952T1 (fr)
AU (1) AU7826494A (fr)
CA (1) CA2172285A1 (fr)
DE (1) DE69415035T2 (fr)
ES (1) ES2124430T3 (fr)
FI (1) FI111276B (fr)
NO (1) NO316278B1 (fr)
SE (1) SE501772C2 (fr)
WO (1) WO1995009268A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997032079A1 (fr) * 1996-02-28 1997-09-04 Alfa Laval Ab Amelioration de la recuperation de fibres fines de suspensions contenant ces fibres et des polluants
EP0826819B1 (fr) * 1996-08-30 2002-11-20 Voith Paper Fiber Systems GmbH & Co. KG Dispositif de déshydratation d'une suspension fibreuse
FI106386B (fi) * 1999-05-03 2001-01-31 Valmet Corp Menetelmä ja laitteisto kuitujen talteenottamiseksi paperitehtaan kiertovedestä

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2666598B1 (fr) * 1990-09-10 1994-05-27 Escher Wyss Gmbh Procede de separation, notamment de tri ou de fractionnement d'une suspension de pate a papier.

Also Published As

Publication number Publication date
SE9303194D0 (sv) 1993-09-30
CA2172285A1 (fr) 1995-04-06
AU7826494A (en) 1995-04-18
FI111276B (fi) 2003-06-30
SE9303194L (sv) 1995-03-31
JPH09505641A (ja) 1997-06-03
ES2124430T3 (es) 1999-02-01
DE69415035T2 (de) 1999-05-06
SE501772C2 (sv) 1995-05-15
NO961129L (no) 1996-03-20
NO961129D0 (no) 1996-03-20
DE69415035D1 (de) 1999-01-14
FI961452A (fi) 1996-03-29
NO316278B1 (no) 2004-01-05
ATE173952T1 (de) 1998-12-15
WO1995009268A1 (fr) 1995-04-06
EP0721526A1 (fr) 1996-07-17
FI961452A0 (fi) 1996-03-29

Similar Documents

Publication Publication Date Title
US4983258A (en) Conversion of pulp and paper mill waste solids to papermaking pulp
US5002633A (en) Conversion of pulp and paper mill waste solids to papermaking pulp
US5137599A (en) Conversion of pulp and paper mill sludge to papermaking pulp
USRE36424E (en) Method for producing pulp from printed unselected waste paper
US3833468A (en) System for recovery of fiber from paper mill effluent, including a sieve bend screen
FI112510B (fi) Raaka-aineiden talteenotto ja uudelleenkäyttö paperiteollisuuden jäännöslietteestä
EP1126076B1 (fr) Procédé et dispositif pour l'épuration de pâte à papier
US5798046A (en) Enhanced removal of hydrophobic contaminants from water clarification systems
US3884755A (en) Closed cycle paper sheet production
EP0721526B1 (fr) Procede et appareil d'essorage d'une suspension de fibres
US5302245A (en) Integrated wastepaper treatment process
US5458738A (en) Clarifying suspended solids from liquid process streams
FI88732C (fi) Foerfarande och anordning foer behandling av bakvatten
SE9503383L (sv) Skruvpress med separat tvättzon för avvattning och tvättning av fibersuspensioner
CA2144696A1 (fr) Extraction par voie centrifuge de contaminants dans les liquides de traitement de pates et papier
US6205675B1 (en) Dehydration machine
Burt et al. Analysis of the hydrocyclone stock cleaning process for wasted fibre in a paper mill
US7267231B2 (en) Process and device for aerating suspensions
Shammas et al. Completely closed water systems in paper mills
RU2042380C1 (ru) Фильтр для очистки воды
Nassar et al. Studies on water conservation for Jordan paper and cardboard factories
Kerr New wet waste dewatering technology
Young Recovered paper and the US solid waste dilemma
Woodward Controlling contaminants in the production and use of deinked pulp
CN109574117A (zh) 再生文化纸生产工艺的节水改造系统及方法

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: 19960321

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT DE ES FR IT

17Q First examination report despatched

Effective date: 19970204

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: KVAERNER PULPING AS.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE ES FR IT

REF Corresponds to:

Ref document number: 173952

Country of ref document: AT

Date of ref document: 19981215

Kind code of ref document: T

REF Corresponds to:

Ref document number: 69415035

Country of ref document: DE

Date of ref document: 19990114

ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2124430

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20060914

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20060922

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20060926

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20060928

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20060930

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070929

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080401

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20080531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071001

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20071001

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071001

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070929