SE501772C2 - Method and apparatus for increasing the yield upon dewatering of a fiber suspension - Google Patents

Method and apparatus for increasing the yield upon dewatering of a fiber suspension

Info

Publication number
SE501772C2
SE501772C2 SE9303194A SE9303194A SE501772C2 SE 501772 C2 SE501772 C2 SE 501772C2 SE 9303194 A SE9303194 A SE 9303194A SE 9303194 A SE9303194 A SE 9303194A SE 501772 C2 SE501772 C2 SE 501772C2
Authority
SE
Sweden
Prior art keywords
fractionator
outlet
dewaterer
fractions
increasing
Prior art date
Application number
SE9303194A
Other languages
Swedish (sv)
Other versions
SE9303194D0 (en
SE9303194L (en
Inventor
Kent Strid
Original Assignee
Kvaerner Pulp Equipment 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 Pulp Equipment As filed Critical Kvaerner Pulp Equipment As
Priority to SE9303194A priority Critical patent/SE501772C2/en
Publication of SE9303194D0 publication Critical patent/SE9303194D0/en
Priority to PCT/SE1994/000899 priority patent/WO1995009268A1/en
Priority to DE69415035T priority patent/DE69415035T2/en
Priority to ES94929079T priority patent/ES2124430T3/en
Priority to EP94929079A priority patent/EP0721526B1/en
Priority to JP7510256A priority patent/JPH09505641A/en
Priority to AT94929079T priority patent/ATE173952T1/en
Priority to AU78264/94A priority patent/AU7826494A/en
Priority to CA002172285A priority patent/CA2172285A1/en
Publication of SE9303194L publication Critical patent/SE9303194L/en
Publication of SE501772C2 publication Critical patent/SE501772C2/en
Priority to NO19961129A priority patent/NO316278B1/en
Priority to FI961452A priority patent/FI111276B/en

Links

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

Landscapes

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

Abstract

In a method for the conversion of a fibre suspension, and particularly for increasing the output of a dewatering apparatus especially for recycled fibre pulp, the reject from the dewatering apparatus is treated in a fractionator, where fractioning takes place in liquid, and fractions from the fractionator are selectively introduced into the accept flow from the dewatering apparatus. In an apparatus for practising the method, a fractionator (10) of the kind where fractioning takes place in liquid is connected to the reject outlet (8) of a dewatering apparatus (1), and the fraction outlets (18, 19, 20) of the fractionator lead to the accept outlet (6) of the dewatering apparatus (1).

Description

15 20 25 30 35 501 772 ansökningen nr. 9303192-0, benämnd "Apparat för tvättning av fibersuspensioner". I denna införs utspädd returfibermassa (ca. 1%) genom ett inlopp 2. Vatten pressas ur massan genom en perforerad trumma 3, och den urvattnade massan (ca. 8%) tas av trumman med hjälp av en rulle 4 och en schaber 5 samt leds bort via en utloppsledning 6. Det urpressade vattnet, vilket innehåller såväl långa fibrer, nollfibrer som fyll- medel, leds från en behållare 7 ut genom ett utlopp 8. 15 20 25 30 35 501 772 application no. 9303192-0, entitled "Apparatus for washing fiber suspensions". Diluted recycled pulp (approx. 1%) is introduced into it through an inlet 2. Water is forced out of the pulp through a perforated drum 3, and the diluted pulp (approx. 8%) is removed from the drum by means of a roller 4 and a doctor blade 5 and is drained via an outlet line 6. The extruded water, which contains both long fibers, zero fibers and fillers, is led from a container 7 out through an outlet 8.

Till utloppet 8 är anslutet inloppet 9 till en i vätska fraktionerande fraktionator 10, dvs. en apparat, som utnytt- jar det strömningstekniska fenomen, som innebär att större partiklar i en strömmande vätska förflyttar sig framåt i strömningsriktningen, medan mindre partiklar förflyttar sig relativt sett bakåt i strömningsriktningen. Sålunda uppkommer i en strömmande plugg av t.ex. en suspension en fraktionering i fallande partikelstorlek framifrån och bakåt i pluggen. Den visade fraktionatorn är av det slag, som beskrivs i den samtidigt härmed inlämnade svenska patentansökningen nr. 9303193-8, benämnd "Fraktionator". En sådan fraktionator är försedd med en roterbar cylindrisk trumma 11, inuti vilken finns ett flertal med trumman koncentriska cylindrar 12, 13, 14, 15 och 16. Var annan sådan är i sin ena ände tätt för- bunden med trummans ena ändvägg, medan strömning kan ske mellan cylinderns andra ände och trummans motstående ändvägg.The inlet 9 is connected to the outlet 8 to a fractionation 10 in liquid fraction, i.e. an apparatus which utilizes the flow engineering phenomenon, which means that larger particles in a flowing liquid move forward in the direction of flow, while smaller particles move relatively backwards in the direction of flow. Thus arises in a flowing plug of e.g. a suspension a fractionation in falling particle size from front to back in the plug. The fractionator shown is of the type described in the Swedish patent application no. 9303193-8, designated "Fractionator". Such a fractionator is provided with a rotatable cylindrical drum 11, inside which there are a plurality of cylinders 12, 13, 14, 15 and 16 concentric with the drum. Each other is at one end tightly connected to one end wall of the drum, while flowing can take place between the other end of the cylinder and the opposite end wall of the drum.

Suspension, som från avvattnarens utlopp 8 införs i den roterande trummans centrum genom inloppet 9, strömmar således fram och åter mellan trummans ändväggar och samtidigt utåt mot trummanteln 17, där fraktionatorn är försedd med utlopp för flera fraktioner, i det visade exemplet ett utlopp 18 för långa fibrer, ett utlopp 19 för nollfibrer och ett utlopp 20 för fyllmedel, såsom aska och lera.Suspension, which is introduced from the outlet of the dewaterer into the center of the rotating drum through the inlet 9, thus flows back and forth between the end walls of the drum and at the same time outwards towards the drum jacket 17, where the fractionator is provided with an outlet for several fractions. long fibers, an outlet 19 for zero fibers and an outlet 20 for fillers, such as ash and clay.

Utloppen 18, 19 och 20 är anslutna till utloppsledningar 21, 22 resp. 23, vilka i sin tur på icke visat sätt är anslutna till avvattnarens utloppsledning 6. Lämpligen leder 10 501 772 utloppsledningarna till icke visade tankar för de olika fraktionerna, från vilka fraktionerna selektivt kan införas i avvattnarens utloppsledning 6 för att i det koncentrerade returmassaflödet där i valda mängder återinföra valda fraktioner från fraktionatorn. Den eller de fraktioner, som skall införas i utloppsledningen 6, liksom mängden därav, bestäms genom att avkänna kvaliteten på massan vid avvatt- narens inloppp 2 och/eller dess utlopp 6.The outlets 18, 19 and 20 are connected to outlet lines 21, 22 and 21, respectively. 23, which in turn are connected in a manner not shown to the outlet line 6 of the dewaterer. Preferably, the outlet lines lead to tanks (not shown) for the various fractions, from which the fractions can be selectively introduced into the outlet line 6 of the dewaterer in the concentrated return mass flow therein. selected quantities re-introduce selected fractions from the fractionator. The fraction or fractions to be introduced into the outlet line 6, as well as the amount thereof, are determined by sensing the quality of the mass at the inlet 2 of the dewaterer and / or its outlet 6.

Claims (5)

10 15 20 25 30 501 772 PATENTKRAV10 15 20 25 30 501 772 PATENT REQUIREMENTS 1. Förfarande för upparbetning av en fibersuspension, och särskilt för att öka utbytet från en avvattnare för i synner- het returmassa, k ä n n e t e c k n a t a v att rejektet från avvattnaren behandlas i en fraktionator, där fraktione- ring sker i vätska, och att fraktioner från fraktionatorn selektivt införs i acceptflödet från avvattnaren.A process for preparing a fiber suspension, and in particular for increasing the yield of a dewaterer for in particular recycled pulp, characterized in that the reject from the dewaterer is treated in a fractionator, where fractionation takes place in liquid, and that fractions from the fractionator selectively introduced into the acceptance stream from the dewaterer. 2. Förfarande enligt krav 1, k ä n n e t e c k n a t a v att fraktionerna från fraktionatorn införs i acceptflödet från avvattnaren i beroende av dettas konstaterade kvalitet.2. A method according to claim 1, characterized in that the fractions from the fractionator are introduced into the acceptance stream from the dewaterer depending on its ascertained quality. 3. Anordning för upparbetning av en fibersuspension och särskilt för att öka utbytet från en avvattnare för i synner- het returmassa, k ä n n e t e c k n a d a v att till en avvattnares (1) rejektutlopp (8) är kopplad en fraktionator (10) av det slag, där fraktionering sker i vätska, och att fraktionatorns fraktionsutlopp (18, 19, 20) leder till avvattnarens (1) acceptutlopp (6).Device for processing a fiber suspension and in particular for increasing the yield from a dewaterer for in particular return pulp, characterized in that a fractionator (10) of the type in which a rejector outlet (8) of a dewaterer (1) is connected fractionation takes place in liquid, and that the fractional outlet (18, 19, 20) of the fractionator leads to the acceptance outlet (6) of the dewaterer (1). 4. Anordning enligt krav 3, k ä n n e t e c k n a d a v medel för att avkänna suspensionskvaliteten vid avvattnarens inlopp (2) och/eller vid dess utlopp (6).Device according to claim 3, characterized by means for sensing the quality of suspension at the inlet (2) of the dewaterer and / or at its outlet (6). 5. Anordning enligt krav 4, k ä n n e t e c k n a d a v medel mellan fraktionatorns fraktionsutlopp (18, 19, 20) och avvattnarens (1) acceptutlopp (6) för att styra tillförseln av fraktioner till acceptutloppet i beroende av avkänd suspensionskvalitet.Device according to claim 4, characterized by means between the fractional outlet (18, 19, 20) of the fractionator and the acceptor outlet (6) of the dewaterer (1) for controlling the supply of fractions to the acceptor outlet depending on sensed suspension quality.
SE9303194A 1993-09-30 1993-09-30 Method and apparatus for increasing the yield upon dewatering of a fiber suspension SE501772C2 (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
SE9303194A SE501772C2 (en) 1993-09-30 1993-09-30 Method and apparatus for increasing the yield upon dewatering of a fiber suspension
CA002172285A CA2172285A1 (en) 1993-09-30 1994-09-29 Method and apparatus for dewatering of a fibre suspension
EP94929079A EP0721526B1 (en) 1993-09-30 1994-09-29 Method and apparatus for dewatering of a fibre suspension
DE69415035T DE69415035T2 (en) 1993-09-30 1994-09-29 METHOD AND DEVICE FOR DRAINING A FIBER FIBER SUSPENSION
ES94929079T ES2124430T3 (en) 1993-09-30 1994-09-29 METHOD AND APPARATUS TO DEHYDRATE A SUSPENSION OF FIBERS.
PCT/SE1994/000899 WO1995009268A1 (en) 1993-09-30 1994-09-29 Method and apparatus for dewatering of a fibre suspension
JP7510256A JPH09505641A (en) 1993-09-30 1994-09-29 Method and apparatus for dehydrating fiber suspension
AT94929079T ATE173952T1 (en) 1993-09-30 1994-09-29 METHOD AND DEVICE FOR DEWATERING A FIBER SUSPENSION
AU78264/94A AU7826494A (en) 1993-09-30 1994-09-29 Method and apparatus for dewatering of a fibre suspension
NO19961129A NO316278B1 (en) 1993-09-30 1996-03-20 Method and apparatus for increasing the yield of a dewatering device for a fiber suspension
FI961452A FI111276B (en) 1993-09-30 1996-03-29 Method and apparatus for removing water from a fiber suspension

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9303194A SE501772C2 (en) 1993-09-30 1993-09-30 Method and apparatus for increasing the yield upon dewatering of a fiber suspension

Publications (3)

Publication Number Publication Date
SE9303194D0 SE9303194D0 (en) 1993-09-30
SE9303194L SE9303194L (en) 1995-03-31
SE501772C2 true SE501772C2 (en) 1995-05-15

Family

ID=20391269

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9303194A SE501772C2 (en) 1993-09-30 1993-09-30 Method and apparatus for increasing the yield upon dewatering of a fiber suspension

Country Status (11)

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

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2247032A1 (en) * 1996-02-28 1997-09-04 Ryan M. Smith Improved recovery of fine fibers from suspensions containing fibers and contaminants
DE59708756D1 (en) * 1996-08-30 2003-01-02 Voith Paper Fiber Systems Gmbh Device for dewatering a fiber suspension
FI106386B (en) * 1999-05-03 2001-01-31 Valmet Corp Method and apparatus for recovering fibers from recycled water in a paper mill

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2666598B1 (en) * 1990-09-10 1994-05-27 Escher Wyss Gmbh PROCESS FOR SEPARATING, ESPECIALLY SORTING OR SPLITTING A SUSPENSION OF PAPER PULP.

Also Published As

Publication number Publication date
SE9303194D0 (en) 1993-09-30
ATE173952T1 (en) 1998-12-15
CA2172285A1 (en) 1995-04-06
DE69415035D1 (en) 1999-01-14
EP0721526A1 (en) 1996-07-17
AU7826494A (en) 1995-04-18
EP0721526B1 (en) 1998-12-02
ES2124430T3 (en) 1999-02-01
WO1995009268A1 (en) 1995-04-06
SE9303194L (en) 1995-03-31
DE69415035T2 (en) 1999-05-06
FI961452A (en) 1996-03-29
NO961129D0 (en) 1996-03-20
JPH09505641A (en) 1997-06-03
NO316278B1 (en) 2004-01-05
FI111276B (en) 2003-06-30
NO961129L (en) 1996-03-20
FI961452A0 (en) 1996-03-29

Similar Documents

Publication Publication Date Title
EP0073609A3 (en) Rotary screening machine
FI64198C (en) ANRIKNINGSFOERFARANDE FOER AVFALLSPAPPER
SE507242C2 (en) Methods and apparatus for high-sulphidity boiling of pulp using black liquor sulphonation of base chips
US4387856A (en) Method for operating an installation for processing waste paper
SE421434B (en) SCREW PRESS
US4405450A (en) Method for fractionating fiber stock obtained from waste paper and apparatus for the performance of the aforesaid method
SE509400C2 (en) decanter centrifuge
SE8401846D0 (en) SET AND DEVICE FOR TREATMENT OF MATERIAL SUSPENSIONS
SE468015B (en) APPLICATION FOR PREPARATION OF FIBER MASS OF LIGNOCELLULO MATERIAL
SE501772C2 (en) Method and apparatus for increasing the yield upon dewatering of a fiber suspension
FI82497B (en) FOERFARANDE OCH ANORDNING FOER RENING AV HOEGKONSISTENSMASSA.
SE452953B (en) PROCEDURE AND DEVICE FOR TREATMENT FROM A THREE-BARKING DEVICE RESULTING BARK
CA2458100C (en) Process for controlling operation of a flotation cell
SE9503383L (en) Screw press with separate washing zone for dewatering and washing of fiber suspensions
US4138332A (en) Method and device for dewatering solid suspensions
US4368101A (en) Method and apparatus for the production of a suspension of fibrous material made from waste-paper
NO178348B (en) Method and apparatus for producing cellulose pulp with improved quality properties
DE69307477T2 (en) Device for separating heavy particles from a stream with fibrous material
ATE123823T1 (en) METHOD FOR PROCESSING PLASTIC COATED TEXTILE MATERIALS AND SYSTEM FOR IMPLEMENTING THE METHOD.
SE463498B (en) SEPARATION PROCEDURE CONTAINS TWO SOLIDS IN A FLUID WITH A SILORGAN AND A DELATER SOCIETY OF THAT THROUGH THE SILORGAN
SE470315B (en) Methods to control the screening process when screening cellulose-containing pulp suspensions
FI953228A0 (en) Block pulp feed at the paper machine pulp wire feed point
GB1322323A (en) Separating means and method
SE441523B (en) METHOD AND APPARATUS FOR COLLECTION OF MINERAL FIBERS CREATED BY FIBERATION OF A MINERAL MELT
CA1335147C (en) System for wastepaper conditioning

Legal Events

Date Code Title Description
NUG Patent has lapsed