EP0616072B1 - Procédé de triage d'un suspension de fibres et dispositif de triage pour son application - Google Patents

Procédé de triage d'un suspension de fibres et dispositif de triage pour son application Download PDF

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Publication number
EP0616072B1
EP0616072B1 EP94102519A EP94102519A EP0616072B1 EP 0616072 B1 EP0616072 B1 EP 0616072B1 EP 94102519 A EP94102519 A EP 94102519A EP 94102519 A EP94102519 A EP 94102519A EP 0616072 B1 EP0616072 B1 EP 0616072B1
Authority
EP
European Patent Office
Prior art keywords
partition
screening device
rakers
openings
flow
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
EP94102519A
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German (de)
English (en)
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EP0616072A1 (fr
Inventor
Wolfgang Mannes
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.)
Voith Paper Fiber and Environmental Solutions GmbH and Co KG
Original Assignee
Voith Sulzer Stoffaufbereitung GmbH
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 Voith Sulzer Stoffaufbereitung GmbH filed Critical Voith Sulzer Stoffaufbereitung GmbH
Publication of EP0616072A1 publication Critical patent/EP0616072A1/fr
Application granted granted Critical
Publication of EP0616072B1 publication Critical patent/EP0616072B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/02—Straining or screening the pulp
    • D21D5/04—Flat screens
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/02—Straining or screening the pulp
    • D21D5/023—Stationary screen-drums
    • D21D5/026—Stationary screen-drums with rotating cleaning foils

Definitions

  • the invention relates to a screening device for sorting fiber suspension according to the preamble of claim 1.
  • Sorting processes are often used in plants for the processing of waste paper, possibly also in the treatment of pulp suspensions.
  • the aim of such a treatment of pulp suspensions is the separation of impurities or pieces of pulp which cannot be dissolved sufficiently.
  • the focus is on contaminating substances that come from the use of the paper and would interfere with the processing and reuse of the recycled waste paper.
  • Plastic contaminants, adhesive backs and highly wet-strength paper parts are particularly important. In principle, other contaminants can also be removed by means of such screening devices; For economic reasons, however, it is advisable in many cases to use the density deviating from the suspension, particularly in relation to stones, broken glass and metal parts, in hydrocyclones.
  • the styrofoam parts also have the property of being able to float easily due to a much lower density and thus be removable in hydrocyclones, but on the other hand they are very easy to shred by mechanical forces to such an extent that their removal then becomes difficult. For this reason, it is often also desirable to remove styrofoam parts from the suspension very early in the preparation process.
  • sorber devices of the type specified in the preamble are used.
  • a screening device which is also provided with movable rotors on both sides of the planar separating element, that is to say on the inlet side and on the passage side, with clearers on the passage side and flow blades on the inlet side.
  • the sieve is to be kept free by generating an axial suction on the sieve with the aid of the flow blades.
  • the aim of the invention is therefore to create a screening device which guarantees perfect operation, in particular the freedom from blockage in a continuous mode of operation, but on the other hand does not crush the contaminants to be separated out or at most to such an extent that they can be eliminated effectively and economically.
  • the flow blades are designed in this way and relative to the other parts of the machine positioned that mechanical comminution of the solids is extremely low.
  • relatively large distances to the parts of the machine, relative to which the flow blades move can be selected, rounded edges on the flow blades and / or a cross-sectional geometry of the blades, which is designed such that the greatest possible momentum transfer to the suspension takes place, and so the relative movement between suspension and flow blades is reduced.
  • the effect of the flow blades can advantageously be adjusted so that a transport movement of the solids takes place on the inlet side when they are being lifted off the partition by the pressure impulse of the scrapers through the openings. A clogging of the openings in the partition can therefore not occur.
  • a low mechanical stress on the fibrous material may occasionally be desirable as long as there is no excessive comminution of contaminants.
  • FIG. 1 shows a model of the sorting process according to the invention in three phases (1a, 1b, 1c), shown roughly schematically.
  • both a flow blade 7 and a scraper 6 move along a partition wall 3 serving as a separating element.
  • the suspension flow is indicated by arrows 12 in the area of the openings 2 indicated.
  • a pressure pulse forms, which causes a backflow through the openings of the separating element.
  • the solid particle 13 approaching the separating element.
  • FIG. 1 b the solid particle 13 has attached itself to the separating element 3 and clogs part of the openings.
  • the next flow blade 7 and the next scraper 6 are already approaching.
  • the pressure pulse of the scraper 6 pushes the solid particles away from the separating element 3 so far that they can be moved by the flow generated by the blade 7 .
  • FIG. 2 shows an example of a screening device according to the invention. It shows schematically a side sectional view of a housing 1 receiving the suspension S, which contains a partition 3 as a separating element.
  • the partition 3 has a multiplicity of openings 2 (FIG. 3).
  • the suspension flow which can pass through the dividing wall 3 through the openings 2, is led out of the housing through a connecting piece as a good substance G.
  • the remaining amount also comes out of the housing 1 through a nozzle other than Reject R. In normal operation, the amount G is much larger than the amount R.
  • the connecting shaft is guided centrally through the dividing wall 3, it being possible for sealing parts 10 to be used.
  • a gap remains through which part of the suspension can flow. This would be harmless as long as no coarse parts get into the casting and there is no blocking of this space.
  • the rotors can be driven, e.g. via a pulley 11. Furthermore, a bearing 12 is indicated.
  • FIG. 3 shows a section of FIG. 2 and shows in particular how the distance A1 between flow blades 7 and partition 3 and the distance A2 between partition 3 and scraper 6 are defined.
  • the outer diameter of the rotor with the flow blades 7 ' is selected in FIG. 4 such that it is slightly smaller than the inner diameter of the annular perforated partition 3'. This makes it easy to Install and remove from the inlet side 4 without removing the rotor carrying the flow blades 7 '.
  • the rotor itself becomes smaller and therefore cheaper. In operation, its effect also extends to the radially outside area, so that the holes can be kept free by interaction with the clearers 6 passing close to the partition 3 '.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Crushing And Pulverization Processes (AREA)

Claims (12)

  1. Dispositif de tamisage pour le classement d'une suspension de matière fibreuse, en particulier pour la séparation d'impuretés contenues dans une suspension aqueuse, contenant des vieux papiers, avec un carter (1), destiné à recevoir la suspension de matière fibreuse à traiter, qui comporte comme élément de séparation une cloison (3, 3') plane, pourvue d'ouvertures (2), qui sert à retenir les matières solides, en raison de leur taille, sur le côté d'arrivée (4) et qui laisse passer l'eau et la matière fibreuse vers le côté de passage (5), avec des racleurs (6) produisant des coups de pression hydrauliques et qui sont déplaçables sur le côté de passage (5) de la cloison (3, 3') à une distance de la cloison (3, 3') et le long de celle-ci, ainsi qu'avec des pales d'écoulement (7, 7') déplaçables sur le côté d'arrivée (5) de la cloison (3, 3'), à distance de celle-ci, caractérisé en ce que les pales d'écoulement ont un effet de pompage radialement de l'intérieur vers l'extérieur et leur effet de raclage est moins intensif que celui des racleurs (6) sur le côté d'arrivée (4).
  2. Dispositif de tamisage selon la revendication 1, caractérisé en ce que les pales d'écoulement (7, 7'), déplaçables sur le côté d'arrivée (4), ont la forme de pales de transport ou de pompage.
  3. Dispositif de tamisage selon la revendication 1 ou 2, caractérisé en ce que les racleurs (6), déplaçables sur le côté de passage (5) de la cloison (3, 3'), présentent un profil hydrodynamique pour la production de coups de pression, sensiblement transversalement à la direction de déplacement.
  4. Dispositif de tamisage selon l'une des revendications 1 à 3, caractérisé en ce que la distance (A1) des pales d'écoulement (7, 7'), se trouvant sur le côté d'arrivée (4), par rapport à la cloison (3, 3'), est plus que deux fois supérieure à la distance (A2) des racleurs (6) sur le côté de passage (5), par rapport à la cloison (3, 3').
  5. Dispositif de tamisage selon l'une des revendications 1 à 4, caractérisé en ce que les racleurs (6) font partie d'un rotor de racleur (8) et les pales d'écoulement (7, 7') d'un rotor de pales (9).
  6. Dispositif de tamisage selon la revendication 5, caractérisé en ce que les deux rotors (8 et 9) sont reliés entre eux et sont entraînés à la même vitesse de rotation.
  7. Dispositif de tamisage selon l'une des revendications 1 à 6, caractérisé en ce que la distance (A2) entre la cloison (3, 3') et les racleurs (6) est comprise entre 0,5 et 3 mm.
  8. Dispositif de tamisage selon l'une des revendications 1 à 7, caractérisé en ce que la distance (A1) entre les pales d'écoulement (7, 7') et la cloison (3, 3'), est comprise entre 20 et 50 mm.
  9. Dispositif de tamisage selon la revendication 1, caractérisé en ce que la cloison (3') a une forme en anneau de cercle et en ce que l'extension radialement extérieure des pales d'écoulement (7') est inférieure au diamètre intérieur de la cloison (3').
  10. Dispositif de tamisage selon la revendication 1, caractérisé en ce que les ouvertures (2) constituent un grand nombre de trous cylindriques.
  11. Dispositif de tamisage selon la revendication 1, caractérisé en ce que les ouvertures (2) constituent un grand nombre de trous coniques, s'élargissant dans le sens d'écoulement de la suspension.
  12. Dispositif de tamisage selon la revendication 1, caractérisé en ce que les ouvertures (2) constituent un grand nombre de fentes.
EP94102519A 1993-03-16 1994-02-19 Procédé de triage d'un suspension de fibres et dispositif de triage pour son application Expired - Lifetime EP0616072B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4308225A DE4308225C1 (de) 1993-03-16 1993-03-16 Verfahren zur Sortierung von Faserstoffsuspension sowie Siebvorrichtung zu seiner Durchführung
DE4308225 1993-03-16

Publications (2)

Publication Number Publication Date
EP0616072A1 EP0616072A1 (fr) 1994-09-21
EP0616072B1 true EP0616072B1 (fr) 1997-06-18

Family

ID=6482861

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94102519A Expired - Lifetime EP0616072B1 (fr) 1993-03-16 1994-02-19 Procédé de triage d'un suspension de fibres et dispositif de triage pour son application

Country Status (4)

Country Link
US (1) US5509536A (fr)
EP (1) EP0616072B1 (fr)
AT (1) ATE154650T1 (fr)
DE (1) DE4308225C1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6041035A (en) * 1997-06-30 2000-03-21 Rockwell Collins, Inc. Open system modular electronics architecture
EP1059381B1 (fr) * 1999-06-09 2004-04-21 Voith Paper Patent GmbH Rotor pour un pulpeur
KR100492517B1 (ko) * 2002-03-07 2005-06-03 장형수 닥나무 인피섬유를 이용한 인피섬유지 제조장치, 제조방법및 그 방법에 의해 제조된 인피섬유지
US7188622B2 (en) * 2003-06-19 2007-03-13 3M Innovative Properties Company Filtering face mask that has a resilient seal surface in its exhalation valve
DE502006008007D1 (de) * 2005-10-19 2010-11-18 Voith Patent Gmbh Siebvorrichtung zur Nasssiebung von Papierfasersuspensionen

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE233493C (fr) *
US2480119A (en) * 1946-02-25 1949-08-30 Hervey G Cram Disk pulp screen
US3456793A (en) * 1966-01-24 1969-07-22 Beloit Corp Dual pressure stock screen
SE327328B (fr) * 1967-05-17 1970-08-17 G Holm
US3672506A (en) * 1970-05-06 1972-06-27 Jylhavaara Osakeyhtio Pressure strainer device
GB1348347A (en) * 1971-08-16 1974-03-13 Burkhardt H H Kurtz H M Apparatus for filtering a fibrous material suspension
FI51221C (fi) * 1972-06-21 1976-11-10 Yhtyneet Paperitehtaat Oy Painesihtilaite.
DE2750499C3 (de) * 1977-11-11 1982-02-04 Hermann Finckh, Maschinenfabrik GmbH & Co, 7417 Pfullingen Sortierer für Fasersuspension
DE2830386C2 (de) * 1978-07-11 1982-09-02 Hermann Finckh, Maschinenfabrik GmbH & Co, 7417 Pfullingen Verfahren zum Sortieren von Fasersuspensionen sowie Drucksortierer zur Durchführung des Verfahrens
AT365676B (de) * 1979-05-04 1982-02-10 Escher Wyss Gmbh Anlage zur aufbereitung von altpapier
AT378541B (de) * 1981-03-23 1985-08-26 Escher Wyss Gmbh Sortiervorrichtung fuer stoffsuspensionen zur papierherstellung
US4543181A (en) * 1982-12-16 1985-09-24 Kamyr, Inc. Medium consistency flat disk pressure screen
DE3320125A1 (de) * 1983-06-03 1984-12-06 J.M. Voith Gmbh, 7920 Heidenheim Verfahren und einrichtung zur aufbereitung von altpapier
DE3322578C2 (de) * 1983-06-14 1986-01-16 Sulzer-Escher Wyss GmbH, 7980 Ravensburg Sortiervorrichtung
US4717471A (en) * 1985-09-05 1988-01-05 The Black Clawson Company Apparatus for screening paper fiber stock
FI76139C (fi) * 1987-01-19 1988-09-09 Ahlstroem Oy Foerfarande och anordning foer kvistseparering.
US5064537A (en) * 1987-04-16 1991-11-12 The Black Clawson Company Seamless screen cylinder with laser cut openings
SE461104B (sv) * 1988-05-05 1990-01-08 Kamyr Ab Apparat foer uppdelning av en suspension av en fiberhaltig cellulosamassa
FI80736B (fi) * 1989-02-16 1990-03-30 Tampella Oy Ab Foerfarande foer sortering av massasuspension och sorteringsapparat.
FR2663966A1 (fr) * 1990-07-02 1992-01-03 Lamort Em Dispositif de triage d'un melange de pate a papier et de contaminants.
DE9303811U1 (de) * 1993-03-16 1993-04-29 Sulzer-Escher Wyss GmbH, 7980 Ravensburg Siebvorrichtung für Faserstoffsuspension

Also Published As

Publication number Publication date
DE4308225C1 (de) 1994-11-24
ATE154650T1 (de) 1997-07-15
US5509536A (en) 1996-04-23
EP0616072A1 (fr) 1994-09-21

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