EP0831174A1 - Procédé et dispositif pour la déshydratation d'une suspension fibreuse - Google Patents

Procédé et dispositif pour la déshydratation d'une suspension fibreuse Download PDF

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Publication number
EP0831174A1
EP0831174A1 EP97112834A EP97112834A EP0831174A1 EP 0831174 A1 EP0831174 A1 EP 0831174A1 EP 97112834 A EP97112834 A EP 97112834A EP 97112834 A EP97112834 A EP 97112834A EP 0831174 A1 EP0831174 A1 EP 0831174A1
Authority
EP
European Patent Office
Prior art keywords
drainage device
cylinder
suspension
converging
sieve
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.)
Granted
Application number
EP97112834A
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German (de)
English (en)
Other versions
EP0831174B1 (fr
Inventor
Axel Gommel
Josef Schneid
Herbert Holik
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.)
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Publication date
Application filed by Voith Sulzer Stoffaufbereitung GmbH filed Critical Voith Sulzer Stoffaufbereitung GmbH
Publication of EP0831174A1 publication Critical patent/EP0831174A1/fr
Application granted granted Critical
Publication of EP0831174B1 publication Critical patent/EP0831174B1/fr
Anticipated expiration legal-status Critical
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    • 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
    • D21F1/74—Pulp catching, de-watering, or recovering; Re-use of pulp-water using cylinders
    • D21F1/78—Pulp catching, de-watering, or recovering; Re-use of pulp-water using cylinders with pressure
    • 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
    • D21F1/80—Pulp catching, de-watering, or recovering; Re-use of pulp-water using endless screening belts

Definitions

  • the invention relates to a method for dewatering a fiber suspension according to the preamble of claim 1 and drainage devices according to the Preambles of claims 12, 24 and 25.
  • WO 96/08660 describes a device with which a method of this type is feasible.
  • This device contains a drivable suction roll permeable surface, which consists of an impermeable plastic tape on a Part of its circumference is surrounded. The suspension is between these two surfaces entered and drained.
  • Another disadvantage of this device is that it is at a standstill and impermeable sieve surface can accumulate solids during operation, which are very quickly lead to clumps and the operation of the whole device sensitive to disturb. Cleaning is not possible during operation.
  • the invention has for its object to a method of the type mentioned create and design such that good drainage performance at high Operational safety is achieved.
  • the more or less dry substance obtained from the fiber suspension lies in Web form before, possibly also in the form of fiber rolls, the axis of which at Arise transverse to the direction of movement of the surfaces and the one diameter can have between less than one millimeter and several millimeters.
  • a further advantage is achieved with the invention, namely that there is practically none Cleaning problems arise in the area of the converging surfaces. These are essentially designed to be permeable and can be continuously flushed during operation will. One of these surfaces can stand still, i.e. None at all Perform translatory movement, but it can also be done with a variable Speed, e.g. Creep speed can be moved e.g. the wear too to be able to carry out cleaning in a similar manner or in extreme cases.
  • a variable Speed e.g. Creep speed can be moved e.g. the wear too to be able to carry out cleaning in a similar manner or in extreme cases.
  • the suspension is included a flow rate introduced into such a dewatering device, where the flow velocity i.a. determines the amount of suspension on the Machine can be drained in a certain time.
  • the flow velocity i.a. determines the amount of suspension on the Machine can be drained in a certain time.
  • you give for at least one of the surfaces touching this suspension has a velocity in Current direction (downstream), which with a certain deviation of the Flow rate of the suspension at the inlet corresponds.
  • This Differential speed there are already possibilities to influence the Drainage effect of the machine.
  • the two converging surfaces are said to be move past each other at relative speed.
  • a simple realization is the one to keep an area still. But there may be advantages, even if the second Area absolutely seen at a low speed (creep speed) is moved, which is less expensive and also the possibility offers to clean both surfaces during operation. At high Machine speed, the second surface moves even faster, depending on how it requires the desired relative speed.
  • Fig. 1 shows the using a schematically illustrated drainage device How to proceed with the procedure.
  • the illustrated Drainage device is one of the converging surfaces by an inner one curved surface 2 is formed, which belongs to a cylinder 4.
  • This cylinder 4 rotates in the circumferential direction (arrow R), at a speed that with a corresponds to a certain deviation in the speed at which the suspension S from the Headbox 3 exits.
  • the second converging surface is the outer curved one Surface 2, here formed by a sieve 6, which is clamped at both ends, that is, itself practically not moved in the circumferential direction.
  • Both curved surfaces 1 and 2 are with Provide openings 5 and 7, which are only indicated here by way of example.
  • the Suspension S is inserted between the two curved surfaces 1 and 2 and dewatered, these relative to each other in the manner already mentioned move.
  • the suspension is drained on both sides, which is indicated by arrows W1 and W2 is indicated.
  • the dewatered suspension S 'falls into a collecting container. If required, it can also be removed from the cylinder 4 with a scraper 9 will.
  • the Sieve 6 is designed as an endless loop. This creates the possibility of this To either let the sieve run at a creep speed - as already mentioned - to clean it (e.g. with spray pipe 8) or its wear even or it is also possible to increase the speed of this sieve choose that it corresponds approximately to the speed of the inflowing suspension S.
  • the cylinder 4 can stand still or in turn with an adapted Speed to be moved. If the cylinder 4 is moved, it also receives one drive not shown here. Then he can advantageously by a spray tube 8 ' getting cleaned.
  • FIG. 3 represents a variant of the device shown in FIG Sieve 6 additionally guided between two press rolls 10 in order to increase the dewatering effect increase.
  • One of these press rollers can be used to remove the thickened material.
  • Fig. 4 explains a variant of the method based on another Drainage device in which both converging surfaces are curved are, but the inner curved surface 2 is formed by a curved shoe 11 becomes.
  • This shoe 11 stands still in space, and the relative movement is caused by a revolving sieve 6, similar to that already explained, enables.
  • this can Shoe 11 are also under negative pressure.
  • Advantageous but not essential is an additional pressure by the pressure roller 12. This is with a force (Arrow) pressed against the screen 6 in the direction of the shoe 11 and thereby increases the Drainage performance of the device.
  • the press roller 12 can be smooth, felted or else be provided with openings. A press shoe can also be used in its place will.
  • the drainage zone may well be advantageous to divide the drainage zone into at least two sections to subdivide in which one of the curved surfaces has different curvatures and / or angle.
  • a measure is indicated in FIG. 6 using the example a rigid screen forming the outer curved surface, which consists of two parts 6 ' and 6 ′′, which are connected to one another by a joint 14.
  • This joint can also be made movable in special cases, so that the limit of can change two areas that belong to the respective parts 6, 6 'of the sieve.
  • the Subdivision can also be made so that more than two areas are created. If, instead of the rigid sieves shown here, flaccid sieves are used, then this is easily possible since they can be tensioned at one end, whereby the fabric tension can advantageously be different.
  • the sieves are then on one fixable line, e.g. can be formed by a fastening rod connected. The fastening rod could also be displaceable.
  • Fig. 7 shows the part of a sieve that is used in carrying out the method can find on a surface that is not moved in space.
  • Zones with different mesh sizes can be provided, as a rule the mesh size or weave, seen in the flow direction of the suspension, is coarser becomes.
  • the structure of the screens is exaggerated to make them clear.
  • the drainage effect can be further increased if a special one Pressure device 20, as shown in Fig. 8, is used.
  • This contains a Pressure element 21, e.g. an air hose which strips 22 against e.g. a standing, flexible sieve 6 presses.
  • the pressing device 20 is designed so that between the bars form chambers of different pressure, the mutual Actuation - first overpressure with air pressure, then underpressure to extract the Water, then again overpressure etc. - the drainage promotes.
  • the mutual Actuation first overpressure with air pressure, then underpressure to extract the Water, then again overpressure etc. - the drainage promotes.
  • overpressure wash water if a special washing effect it is asked for.
  • the pressure element can also generate pressure surges and thereby further drainage improve.
  • the method can be carried out if at least one of the converging surfaces is domed. As shown in Fig. 9, a curved surface that then the moving surface is usually, interact with a flat surface. Also double-sided drainage is possible.
  • FIG. 10 there is another one provided with pressure strips 24 Drainage area drawn.
  • the pressure bars can, for example, as shown here, are pressed against a permeable surface with springs, so that a reinforced one Drainage takes place. For reasons of wear, the pressure bars are advantageous press against the sieve that is not running or at most in the crawl space.
  • Pulsation devices 23 are used, which not only the drainage performance increase, but also help prevent the fabric from sticking.
  • Fig. 11 shows a device similar to Fig. 2, but rotated essentially by 90 o , so that the drainage area is substantially below the cylinder.
EP97112834A 1996-08-30 1997-07-25 Procédé et dispositif pour la déshydratation d'une suspension fibreuse Expired - Lifetime EP0831174B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19635202 1996-08-30
DE19635202 1996-08-30

Publications (2)

Publication Number Publication Date
EP0831174A1 true EP0831174A1 (fr) 1998-03-25
EP0831174B1 EP0831174B1 (fr) 2002-11-06

Family

ID=7804190

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97112834A Expired - Lifetime EP0831174B1 (fr) 1996-08-30 1997-07-25 Procédé et dispositif pour la déshydratation d'une suspension fibreuse

Country Status (4)

Country Link
US (1) US6042735A (fr)
EP (1) EP0831174B1 (fr)
AT (1) ATE227371T1 (fr)
DE (2) DE19648773A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000003782A1 (fr) * 1998-07-16 2000-01-27 Novus International, Inc. Filtre a bande sans fin avec organe de pression et procede de filtration
US6206203B1 (en) 1996-01-23 2001-03-27 Novus International, Inc. Apparatus and process for separating components of a treatment mixture from waste water treatment system

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19753604C2 (de) * 1997-12-03 1999-12-16 Voith Sulzer Stoffaufbereitung Verfahren zum Entwässern einer Faserstoffsuspension
DE19806402A1 (de) * 1998-02-17 1999-08-19 Voith Sulzer Papiertech Patent Verfahren zum Zusammenführen zweier Suspensionsschichten sowie Eindickvorrichtung
CA2352414A1 (fr) * 2001-07-05 2003-01-05 Industries Fournier Inc. Dispositif de controle et de retenue des gateaux dans un pressoir rotatif
DE102004033328A1 (de) * 2004-07-09 2006-02-09 Bhs-Sonthofen Gmbh Filter mit Feststoff-Resuspendierung
MX2007001426A (es) 2004-08-09 2008-03-11 Prime Solution Inc Prensa de ventilador giratorio.
SE528722C2 (sv) * 2005-06-03 2007-01-30 Metso Paper Inc Anordning för behandling av cellulosamassa i en tvättapparat anordnad med en förstärkande spant
EP1943006A4 (fr) * 2005-10-28 2009-11-11 Prime Solution Inc Presse a ventilateur tournant
US8662315B2 (en) * 2008-07-14 2014-03-04 Prime Solution, Inc. Rotary fan press
US20120043285A1 (en) * 2010-08-23 2012-02-23 Van Logtenstein Michael Manure separator
EP2636436A1 (fr) * 2012-03-08 2013-09-11 BOKELA Ingenieurgesellschaft für Mechanische Verfahrenstechnik mbH Procédé et dispositif de formation et de déshumidification d'un gâteau de filtration poreux

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1252408A (fr) * 1960-03-23 1961-01-27 Ekstroems Maskinaffaer Ab Appareil pour séparer un liquide d'une matière fibreuse
FR2384061A1 (fr) * 1977-03-18 1978-10-13 Ingersoll Rand Co Laveur de pate a papier
US4750340A (en) * 1985-10-31 1988-06-14 Kamyr Ab Apparatus for treating a fibre suspension
WO1996008600A1 (fr) * 1994-09-14 1996-03-21 Kvaerner Hymac As Procede et dispositif de concentration d'une suspension

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US50158A (en) * 1865-09-26 Improvement in cider-mills
US838615A (en) * 1904-11-02 1906-12-18 Gustav Goldman Machine for finishing garment-pads of matted or felted fibers.
US1595894A (en) * 1925-07-03 1926-08-10 Frederic P Klund Machine for thickening pulp
US2365658A (en) * 1939-06-20 1944-12-19 American Voith Contact Co Inc Apparatus for the removal of water, liquors, or other liquids from soaked masses of fibrous materials
US3878698A (en) * 1971-12-14 1975-04-22 Karlstad Mekaniska Ab Apparatus for forming and washing a fibrous web
DE4026953C2 (de) * 1990-01-26 1995-11-30 Escher Wyss Gmbh Entwässerungsvorrichtung und Verfahren zur Entwässerung an einem Doppelsiebformer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1252408A (fr) * 1960-03-23 1961-01-27 Ekstroems Maskinaffaer Ab Appareil pour séparer un liquide d'une matière fibreuse
FR2384061A1 (fr) * 1977-03-18 1978-10-13 Ingersoll Rand Co Laveur de pate a papier
US4750340A (en) * 1985-10-31 1988-06-14 Kamyr Ab Apparatus for treating a fibre suspension
WO1996008600A1 (fr) * 1994-09-14 1996-03-21 Kvaerner Hymac As Procede et dispositif de concentration d'une suspension

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6206203B1 (en) 1996-01-23 2001-03-27 Novus International, Inc. Apparatus and process for separating components of a treatment mixture from waste water treatment system
WO2000003782A1 (fr) * 1998-07-16 2000-01-27 Novus International, Inc. Filtre a bande sans fin avec organe de pression et procede de filtration

Also Published As

Publication number Publication date
US6042735A (en) 2000-03-28
DE19648773A1 (de) 1998-03-05
ATE227371T1 (de) 2002-11-15
DE59708657D1 (de) 2002-12-12
EP0831174B1 (fr) 2002-11-06

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