WO2012159876A1 - Triage de fibres - Google Patents

Triage de fibres Download PDF

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Publication number
WO2012159876A1
WO2012159876A1 PCT/EP2012/058412 EP2012058412W WO2012159876A1 WO 2012159876 A1 WO2012159876 A1 WO 2012159876A1 EP 2012058412 W EP2012058412 W EP 2012058412W WO 2012159876 A1 WO2012159876 A1 WO 2012159876A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor blades
rotor
pulp suspension
jet
rotation
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.)
Ceased
Application number
PCT/EP2012/058412
Other languages
German (de)
English (en)
Inventor
Marc Perrin
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
Priority to EP12719963.6A priority Critical patent/EP2714988B1/fr
Priority to CN201280023764.1A priority patent/CN103547733B/zh
Publication of WO2012159876A1 publication Critical patent/WO2012159876A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • D21D5/18—Purification of the pulp suspension by mechanical means; Apparatus therefor with the aid of centrifugal force
    • D21D5/22—Purification of the pulp suspension by mechanical means; Apparatus therefor with the aid of centrifugal force in apparatus with a vertical axis
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D99/00—Subject matter not provided for in other groups of this subclass

Definitions

  • the invention relates to a method for removing long fibers from a
  • the invention also relates to a device for removing long fibers from a pulp suspension with a rotor with rotor blades, in particular for
  • the fibers When recovered paper is converted into a pulp suspension, the fibers generally have very different lengths. It may then be advantageous to separate the short cellulose fibers from long cellulose fibers, especially to be able to produce paper sheets with different qualities.
  • the goal is, on the one hand, a short fiber fraction containing predominantly short fibers whose average lengths are on the order of less than one millimeter, and on the other hand to obtain a long fiber fraction, the
  • the recovery of a long fiber fraction containing long fibers and, for example, free of mineral contents may also be of interest.
  • Fiber webs can be used.
  • Pulp suspension to be removed by washing.
  • pulp suspension also extends to fibers containing process or wastewater, in which the recovery of the fibers is in the foreground.
  • the object of the invention is therefore to make the sorting of long fibers as simple and efficient as possible.
  • Fibrous suspension is directed to the rotor blades of a rotor, wherein the jet direction with the rotation axis forms an angle of less than 45 ° and longer adhering to the rotor blades fibers due to the centrifugal force of the rotor blades are thrown off and collected separately.
  • the invention is also suitable for the treatment of pulp suspensions with fabric densities up to 3.5%, preferably up to 3.5%.
  • the method is very efficient, since predominantly only the long fibers stick to the rotor blades, collect, slide radially outward on the rotor blades and are thrown off from there.
  • the beam direction of the pulp suspension jet should be approximately parallel to the axis of rotation of the rotor. It is advantageous if the jet of pulp suspension before the
  • the speed of the pulp suspension jet when hitting the rotor blades is between 3 and 20 m / s and / or the peripheral speed of the rotor blades is between 10 and 70, preferably between 20 and 40 m / s. In this way it is ensured that as far as possible only the long fibers adhere to the rotor blades, wherein the proportion of removed long fibers can be increased by increasing the peripheral speed.
  • a comprehensive use of the rotor blades can be achieved, in particular, if the pulp suspension jet has an annular cross-section enclosing the axis of rotation of the rotor. It is advantageous if the annular pulp suspension jet has a ring thickness between 1 and 5 mm having.
  • Beam direction with the axis of rotation forms an angle of less than 45 °, the rotor blades have a pointing in the direction of rotation vane edge and in
  • Centrifugal area of the rotor blades Interception chambers are arranged for the longer fibers thrown off the rotor blades.
  • the wing edge is the catching, collecting and hurling the
  • the wing edge has a thickness between 0.2 and 2 mm.
  • Wing edge forms or are designed as wires or flexible threads.
  • the radial sliding out of the long fibers can be assisted until they are thrown off along the edge of the wing, in that the wing edge projects radially outwardly at least in one, preferably at least the outermost, section with respect to the radials
  • Direction of rotation is inclined, wherein the angle between this inclined portion and the radial should be between 30 ° and 70 °.
  • leading edges are not sharp, but have a certain roundness, as can be generated, for example, by electropolishing.
  • the beam direction of the Pulp suspension jet approximately parallel to the axis of rotation of the rotor. This makes it possible that the pulp suspension jet is annular and is guided coaxially with the rotor.
  • Rotor blades are directed. It is advantageous if the distance between the nozzle and the rotor blades is less than 20 mm, preferably less than 10 and in particular less than 5 mm. The small distance between the nozzle outlet and the rotor blades ensures that the increased orientation of the fibers in the direction of flow as a result of the jet acceleration in the nozzle as far as possible to impact on the
  • Rotor blades have a length between 5 and 30 mm, preferably between 10 and 20 mm and / or the rotor with the rotor blades a circular area with a
  • Diameter between 300 and 1, 500 mm swept over The invention will be explained in more detail below with reference to several exemplary embodiments.
  • FIG. 1 shows a schematic cross section through a sorting device
  • FIGS. 2 and 3 a plan view of a rotor with different rotor blades 2;
  • FIGS. 4 to 6 a cross section through different rotor blades 2.
  • the molded body 8 causes an increase in the flow rate of the pulp suspension 1 and thereby an increased orientation of the fibers in
  • the rotor is driven here by a motor 9 arranged below.
  • Pulp suspension jet 1 when hitting the rotor blades 2 between 3 and 20 m / s and the peripheral speed of the rotor blades 2 between 20 and 40 m / s. If the proportion of long fibers separated off via the rotor blades 2 is to be increased, then the peripheral speed of the rotor blades 2 is to be increased for this purpose.
  • the pulp suspension jet 1 When cutting through the pulp suspension jet 1, predominantly longer fibers remain suspended on the rotor blades 2. These can accumulate there and are due to the centrifugal force on the rotor blades 2 to move radially outward and then thrown off.
  • the pulp suspension jet 1 is directed only to the radially inner part of the rotor blades 2, wherein the ring thickness is between 1 and 5 mm and the rotor blades 2 have a length between 10 and 20 mm.
  • the rotor with the rotor blades 2 sweeps a circular area with a diameter between 300 and 1, 500 mm, which also in an annular
  • Pulp suspension jet 1 in conjunction with the desired
  • annular pulp suspension jet 1 Since the annular pulp suspension jet 1 is arranged coaxially to the axis of rotation 3, results in an optimal and uniform effect.
  • the rotor blades 2 have an electropolished surface and a vane edge 5 with a thickness with respect to the beam direction between 0.2 and 2 mm.
  • the rotor blades 2 according to FIG. 2 can be formed by wires which, although straight, are inclined at an angle 12 with respect to the radials opposite to the direction of rotation 4. Due to the inclination of the wing edge 5, the adherent, long fibers on the same easier to slide radially outward and fly from there into the collecting chamber 6.
  • Figure 3 shows the possibility that the rotor blades 2 are connected to each other via their radially inner ends and a radially inner rotor ring 1 1.
  • the rotor blades 2 together with the Rotor ring 1 1 are relatively inexpensively made of a metal sheet, wherein the sheet thickness between 0.2 and 2 mm and the width of the rotor blades 2 in
  • Rotation direction 4 is between 1 and 5 mm.
  • the rotor blades 2 according to FIG. 4 have a wedge-shaped cross section in the direction of rotation 4, wherein the wedge tip points in the direction of rotation 4 and forms the vane edge 5.
  • This cross section also makes it easier for the shorter fibers to pass through
  • the vane edge 5, as shown in FIG. 6, can be inclined radially outwards in the jet direction of the pulp suspension jet 1.
  • Sorting a common axis of rotation and thus also use a common drive 9.
  • the sorting devices can be operated in series or in parallel.

Landscapes

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

Abstract

L'invention concerne un procédé permettant de retirer les fibres longues d'une suspension de matière fibreuse. L'invention a pour objet de trier des fibres longues le plus simplement possible par le fait qu'un jet (1) de la suspension de matière fibreuse est orienté sur les pales (2) d'un rotor, la direction du jet et l'axe de rotation (3) formant un angle inférieur à 45° et des fibres plus longues adhérant aux pales de rotor (2) étant centrifugées grâce à la force centrifuge des pales de rotor (2) et collectées séparément.
PCT/EP2012/058412 2011-05-26 2012-05-08 Triage de fibres Ceased WO2012159876A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP12719963.6A EP2714988B1 (fr) 2011-05-26 2012-05-08 Triage de fibres
CN201280023764.1A CN103547733B (zh) 2011-05-26 2012-05-08 纤维分选

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011076518.2 2011-05-26
DE201110076518 DE102011076518A1 (de) 2011-05-26 2011-05-26 Fasersortierung

Publications (1)

Publication Number Publication Date
WO2012159876A1 true WO2012159876A1 (fr) 2012-11-29

Family

ID=46051678

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/058412 Ceased WO2012159876A1 (fr) 2011-05-26 2012-05-08 Triage de fibres

Country Status (4)

Country Link
EP (1) EP2714988B1 (fr)
CN (1) CN103547733B (fr)
DE (1) DE102011076518A1 (fr)
WO (1) WO2012159876A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014037178A1 (fr) * 2012-09-10 2014-03-13 Voith Patent Gmbh Triage de fibres

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108468245B (zh) * 2018-05-30 2024-03-26 山东杰锋机械制造有限公司 一种外流式低脉冲网前流送压力筛

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2018510A1 (de) 1969-04-22 1970-11-19 Calor Celsius AB, Solna (Schweden) Verfahren und Vorrichtung zum Fraktionieren von Holzzellstoff oder dergleichen
US4427541A (en) * 1982-04-28 1984-01-24 Wisconsin Alumni Research Foundation Method and apparatus for spray fractionation of particles in liquid suspension
WO2001029297A1 (fr) 1999-10-20 2001-04-26 Auckland Uniservices Limited Procede de separation de fibres
WO2005046879A1 (fr) * 2003-11-14 2005-05-26 Akzo Nobel N.V. Appareil et procede de separation
WO2010018120A2 (fr) 2008-08-11 2010-02-18 Voith Patent Gmbh Dispositif de fractionnement

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR930002069B1 (ko) * 1986-04-11 1993-03-26 벨로이트 코포레이션 회전식 분리장치와 분리방법
CN2736409Y (zh) * 2004-01-07 2005-10-26 中国印钞造币总公司 带高速回转叶轮的重质分离器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2018510A1 (de) 1969-04-22 1970-11-19 Calor Celsius AB, Solna (Schweden) Verfahren und Vorrichtung zum Fraktionieren von Holzzellstoff oder dergleichen
US4427541A (en) * 1982-04-28 1984-01-24 Wisconsin Alumni Research Foundation Method and apparatus for spray fractionation of particles in liquid suspension
WO2001029297A1 (fr) 1999-10-20 2001-04-26 Auckland Uniservices Limited Procede de separation de fibres
WO2005046879A1 (fr) * 2003-11-14 2005-05-26 Akzo Nobel N.V. Appareil et procede de separation
WO2010018120A2 (fr) 2008-08-11 2010-02-18 Voith Patent Gmbh Dispositif de fractionnement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014037178A1 (fr) * 2012-09-10 2014-03-13 Voith Patent Gmbh Triage de fibres

Also Published As

Publication number Publication date
DE102011076518A1 (de) 2012-11-29
CN103547733A (zh) 2014-01-29
EP2714988B1 (fr) 2015-07-08
EP2714988A1 (fr) 2014-04-09
CN103547733B (zh) 2016-08-31

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