EP1749923B1 - Dispositif pour traiter une suspension de fibres - Google Patents

Dispositif pour traiter une suspension de fibres Download PDF

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Publication number
EP1749923B1
EP1749923B1 EP06010158A EP06010158A EP1749923B1 EP 1749923 B1 EP1749923 B1 EP 1749923B1 EP 06010158 A EP06010158 A EP 06010158A EP 06010158 A EP06010158 A EP 06010158A EP 1749923 B1 EP1749923 B1 EP 1749923B1
Authority
EP
European Patent Office
Prior art keywords
housing
fibrous suspension
rotor
guide element
guide vanes
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.)
Not-in-force
Application number
EP06010158A
Other languages
German (de)
English (en)
Other versions
EP1749923A1 (fr
Inventor
Erwin Binder
Axel Gommel
Anton Selbherr
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 Patent GmbH
Original Assignee
Voith Patent 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 Patent GmbH filed Critical Voith Patent GmbH
Publication of EP1749923A1 publication Critical patent/EP1749923A1/fr
Application granted granted Critical
Publication of EP1749923B1 publication Critical patent/EP1749923B1/fr
Anticipated expiration legal-status Critical
Not-in-force 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
    • D21D5/023—Stationary screen-drums
    • D21D5/026—Stationary screen-drums with rotating cleaning foils
    • 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
    • D21D5/26—De-aeration of paper stock

Definitions

  • the invention relates to an apparatus according to the preamble of claim 1.
  • the paper pulp required for paper production is first treated on the paper machine in the so-called stock preparation.
  • the fibers are treated and processed in suspension, in particular an aqueous suspension, with a fiber content of between 0.5 and 8%.
  • a large part of these process steps is carried out in closed apparatuses, which therefore belong to a closed system.
  • Apparatuses of the kind mentioned in the introduction can e.g. Pressure sorters in which - as known per se - the pulp suspension to be treated by means of an applied pressure difference through a wet sieve, e.g. a screen cylinder, also called screen basket, is pumped through.
  • a wet sieve e.g. a screen cylinder, also called screen basket
  • a part of the pulp suspension is rejected at the openings of the screen and removed through a separate opening from the housing.
  • a rotor is moved close to it.
  • Apparatus of this type can also be designed so that they serve for venting or degassing of the pulp suspension.
  • the suspension is set into rapid rotation with the aid of the rotor, whereby gases - in particular air - accumulate in the center as a result of the centrifugal forces occurring in the process and then removed through a suitable opening.
  • Bleeding apparatus of this type are suitable for replacing expensive vacuum-operated degassing tanks. They can be arranged with particular advantage directly in front of a pressure-increasing material pump, which further promotes the suspension to the next treatment stage.
  • the drive power used to drive the rotor is of course a cost factor in the operation of such an apparatus.
  • the pressure energy originating from the upstream pump is converted into kinetic energy with little loss. Disturbing and energy-consuming vortices are largely avoided or at least reduced.
  • a drum-shaped rotor 2 is arranged, the interior of which is supplied with a liquid to be degassed, in particular a paper fiber suspension S. It serves to put the inflowing pulp suspension S in a rotational flow.
  • the housing 1 of this apparatus has a rotationally symmetrical, in this case cylindrical part, in which the rotor 2 is arranged concentrically. From the inlet 4, which opens here in the center of the housing 1, the added liquid passes radially outward flowing through a hydraulically acting guide element 3.
  • This is typically constructed annularly and also arranged concentrically with the rotor 2. It has several blades and is closed at the bottom, so that form 6 channels 5 between the blades. These direct the flowed-in fiber suspension radially outward and put them in rotation, whose sense of rotation is equal to the rotational flow generated by the rotor 2.
  • the effect of the rotor 2 can be enhanced by co-rotating blades or entrainment bars 12 mounted therein.
  • the liquid is applied to the inner wall of the rotor 2, wherein the gas contained therein 7, in particular the air, migrates radially inwards.
  • a separation surface between the liquid and the gas forms 7.
  • the gas 7 can be removed or sucked.
  • the Operating conditions are controlled so that a continuous flow of liquid from the inlet 4 to the outlet 10 is formed.
  • the wall is designed to be liquid-permeable in the region of the outlet 10, e.g. by attaching openings 11 in this area.
  • the outlet 10 is advantageously attached tangentially, in such a way that the rotational flow of the liquid degassed at this point causes a pressure build-up in the outlet 10.
  • the openings 11 in the wall of the rotor 2 are so large that they do not lead to a sorting of the degassed liquid, so can not form Feststoffrejekt.
  • the in Fig. 1 Apparatus shown can also be used to remove light dirt from a pulp suspension S.
  • a proportion of such impurities for example plastic foam particles ("polystyrene"), which accumulates centrally due to the centrifugal forces, can be contained in particular in the treatment of waste paper. It can then be deducted by a suitably designed lightweight exhaust pipe, which is the same or similar to the degassing 8 of the Fig. 1 ,
  • Fig. 2 shows the upper part of a venting device according to the invention in top view.
  • the guide element 3 contains an annularly designed guide element 3 in which a total of eight guide vanes 6 are located, which have essentially planar guide surfaces.
  • these guide vanes 6 are inclined relative to the radius.
  • the guide element is closed by a top wall 13 and an opposite bottom wall 14, such as the 3 and 4 make clear. Between the top wall 13 and the bottom wall 14 are located the guide vanes 6. It is possible to perform top wall 13 and bottom wall 14 as a plane parallel coaxial disks, of course, the top wall 13 must be provided with a central passage opening 15 for the inflowing suspension. Will - as in Fig. 4 shown - the top wall 13 (or in other cases, the bottom wall 14) provided with a curved inner contour, this leads to the fact that the distance to the opposite wall and thus the height of the flow channels 5 decreases towards the outside. This has the advantage that during operation of the apparatus, the flow velocity does not decrease radially from the inside to the outside too much or may even be increased.
  • the guide vanes 6 'of the guide element 3' (see Fig. 5 ) curved to thereby prevent unwanted eddies.
  • this illustration shows in Fig. 5 in that the thickness of the guide vanes 6 'of the guide element 3' increases towards the outside, with the advantage of a decrease in the flow cross-section. This aspect has already been discussed.
  • a further advantageous embodiment of the invention is a Drucksortierer, as shown in the Fig. 6 is shown by an example. It has a sieve 17, for example a sieve basket, in order, for example, to retain contaminants from the suspension, which can then be removed from the housing 1 'by a reject outlet 18.
  • a pressure sorter used in paper production have already been explained in the introduction. Even with such an apparatus can be made by application of the invention, in particular by the use of a suitable guide element 3, a particularly low-loss implementation of hydraulic pressure energy in kinetic energy.
  • a relative speed between the rotor and the suspension is generally desirable in order to obtain the clearing action of the rotor.
  • the invention can offer advantages here, in particular if an increased separation of air and / or light parts is to be achieved. Disturbing eddies when accelerating the suspension through the rotor can be avoided.
  • the feed of the suspension to be sorted is not carried out centrally, but tangentially or radially (see, for example, US Pat 6 and 7 ).
  • the guide element 3 can be used in cooperation with an outer annular channel 16, said annular channel 16 may be substantially rotationally symmetrical to the center of the sorter or as a spiral housing, as it is known, for example, in the discharge side of centrifugal pumps.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Claims (19)

  1. Appareil, en particulier appareil de désaérage, appareil de nettoyage ou tamis sous pression, pour le traitement d'une suspension de fibres (S) avec un boîtier fermé (1, 1') qui présente au moins une entrée (4) pour la suspension de fibres (S) à introduire dans le boîtier ainsi qu'au moins une sortie (10) pour la suspension de fibres à faire sortir du boîtier (1, 1'), ainsi qu'au moins un rotor (2) disposé centralement, qui est adapté pour animer d'un mouvement d'écoulement en rotation au moins une partie de la suspension de fibres (S) introduite dans le boîtier (1), au moins un élément conducteur (3, 3') à action hydraulique se trouvant dans le boîtier (1, 1'), lequel présente une pluralité d'aubes directrices (6, 6') inclinées obliquement par rapport au rayon de l'élément conducteur, l'élément conducteur (3, 3') étant adapté pour mettre en rotation la suspension de fibres (S) entrant à travers l'entrée (4) dans le boîtier (1) de telle sorte que le sens de rotation de cette rotation corresponde au sens de rotation de l'écoulement en rotation produit par le rotor (2),
    caractérisé en ce que
    l'élément conducteur (3) est fermé par une paroi supérieure (13, 13') et une paroi inférieure (14) située en regard, et les aubes directrices (6, 6') se trouvent entre la paroi supérieure (13) et la paroi inférieure (14).
  2. Appareil selon la revendication 1,
    caractérisé en ce que
    le boîtier (1, 1') a une partie à symétrie de révolution, notamment cylindrique.
  3. Appareil selon la revendication 2,
    caractérisé en ce que
    la partie cylindrique a un axe médian vertical.
  4. Appareil selon la revendication 2,
    caractérisé en ce que
    la partie cylindrique a un axe médian horizontal.
  5. Appareil selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    l'appareil est un tamis sous pression, dans le boîtier (1') duquel est incorporée au moins une toile (17) notamment cylindrique, maintenue exempte d'obstructions par le rotor, et en ce qu'une sortie de rebut (18) est prévue pour évacuer les proportions rejetées sur la toile (17) de la suspension de fibres acheminée.
  6. Appareil selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    l'appareil présente un tube de dégazage central (8) avec lequel des gaz (7), notamment de l'air, qui s'accumulent centralement du fait des forces centrifuges produites par l'écoulement en rotation, peuvent être évacués hors de l'appareil.
  7. Appareil selon la revendication 6,
    caractérisé en ce que
    l'appareil est un dispositif de dégazage pour une suspension de fibres de papier.
  8. Appareil selon la revendication 7,
    caractérisé en ce que
    le dispositif de dégazage présente un boîtier fixe (1) qui entoure un rotor (2) en forme de tambour, dans l'espace interne duquel la suspension de fibres (S) affluant peut être mise en rotation.
  9. Appareil selon l'une quelconque des revendications 1 à 5,
    caractérisé en ce que
    l'appareil contient un tube d'évacuation de matières légères central, avec lequel des matières légères, qui s'accumulent centralement du fait des forces centrifuges produites par l'écoulement en rotation, peuvent être évacuées hors de l'appareil.
  10. Appareil selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    l'élément conducteur (3, 3') est configuré sous forme annulaire et est disposé concentriquement au rotor (2).
  11. Appareil selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les aubes directrices (6') sont courbes.
  12. Appareil selon l'une quelconque des revendications 1 à 10,
    caractérisé en ce que
    les aubes directrices (6) ont des surfaces directrices essentiellement planes.
  13. Appareil selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le nombre des aubes directrices (6, 6') est d'au moins trois, de préférence d'au moins six.
  14. Appareil selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la paroi supérieure (13) et la paroi inférieure (14) sont planes et parallèles.
  15. Appareil selon l'une quelconque des revendications précédentes 1 à 13,
    caractérisé en ce que
    la paroi supérieure (13) ou la paroi inférieure a un contour interne courbe, qui fait que la distance à la paroi supérieure diminue radialement vers l'extérieur.
  16. Appareil selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    des canaux (5) sont situés entre les aubes directrices (6, 6'), leur section transversale d'écoulement diminuant dans la direction d'écoulement.
  17. Appareil selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    l'entrée (4) est raccordée tangentiellement au boîtier (1').
  18. Appareil selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    l'entrée est connectée à un canal d'entrée en forme de spirale, qui se trouve radialement à l'extérieur de l'élément conducteur (3, 3').
  19. Appareil selon l'une quelconque des revendications 1 à 16,
    caractérisé en ce que
    l'entrée (4) est raccordée centralement au boîtier (1).
EP06010158A 2005-08-04 2006-05-17 Dispositif pour traiter une suspension de fibres Not-in-force EP1749923B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005036671 2005-08-04

Publications (2)

Publication Number Publication Date
EP1749923A1 EP1749923A1 (fr) 2007-02-07
EP1749923B1 true EP1749923B1 (fr) 2012-11-21

Family

ID=37387979

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06010158A Not-in-force EP1749923B1 (fr) 2005-08-04 2006-05-17 Dispositif pour traiter une suspension de fibres

Country Status (3)

Country Link
US (1) US7641767B2 (fr)
EP (1) EP1749923B1 (fr)
JP (1) JP4944532B2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106436418A (zh) * 2016-12-01 2017-02-22 吕刚 一种造纸用均匀蒸煮设备

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI126520B (en) * 2016-03-16 2017-01-31 Red Wire Oy Method of screening and screening device
CN109338783A (zh) * 2018-11-29 2019-02-15 崔雪柯 一种纸浆回收装置
SE543689C2 (en) * 2019-10-04 2021-06-08 Mimbly Ab Improved filter assembly with self-cleaning

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5096127A (en) * 1990-08-22 1992-03-17 Ingersoll-Rand Company Apparatus for pressurized screening of a fibrous material liquid suspension
US6571957B1 (en) * 2000-08-07 2003-06-03 Voith Sulzer Paper Technology North America, Inc. Screening apparatus for fiber suspension
DE10060822B4 (de) * 2000-12-07 2006-04-27 Voith Paper Patent Gmbh Drucksortierer zum Entfernen von Störstoffen aus einer störstoffhaltigen Papierfasersuspension
DE10233364C1 (de) * 2002-07-23 2003-12-24 Voith Paper Patent Gmbh Drucksortierer zum Sieben einer Faserstoffsuspension

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106436418A (zh) * 2016-12-01 2017-02-22 吕刚 一种造纸用均匀蒸煮设备

Also Published As

Publication number Publication date
US7641767B2 (en) 2010-01-05
US20070029231A1 (en) 2007-02-08
JP2007039870A (ja) 2007-02-15
EP1749923A1 (fr) 2007-02-07
JP4944532B2 (ja) 2012-06-06

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