EP1679403B1 - Pulpeur pour désintégrer et mettre en suspension des matériaux pour pâte à papier - Google Patents

Pulpeur pour désintégrer et mettre en suspension des matériaux pour pâte à papier Download PDF

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Publication number
EP1679403B1
EP1679403B1 EP05023603A EP05023603A EP1679403B1 EP 1679403 B1 EP1679403 B1 EP 1679403B1 EP 05023603 A EP05023603 A EP 05023603A EP 05023603 A EP05023603 A EP 05023603A EP 1679403 B1 EP1679403 B1 EP 1679403B1
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EP
European Patent Office
Prior art keywords
screen
openings
pulper
sieve
pulper according
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.)
Active
Application number
EP05023603A
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German (de)
English (en)
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EP1679403A1 (fr
Inventor
Werner Brettschneider
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
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Voith Patent GmbH
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Publication date
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Publication of EP1679403A1 publication Critical patent/EP1679403A1/fr
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/30—Defibrating by other means
    • D21B1/34—Kneading or mixing; Pulpers
    • D21B1/345—Pulpers
    • 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
    • D21D5/16—Cylinders and plates for screens

Definitions

  • the invention relates to a pulper for comminution and suspension of pulp according to the preamble of claim 1.
  • Pulpers of this type are mainly used to suspend dried pulp or waste paper of various composition. They consist essentially of a container for the suspension and at least one rotor. The registered material is intensively mixed in large pieces, webs or pressed bales with water, whereby a hydraulic material drive is generated by the rotor. Understandably, such devices are optimized, aiming essentially for a fast and efficient dissolution.
  • the rotor is placed in close proximity to a flat screen that keeps it free of blockages. Through the openings of the screen, the dissolved substance is sorted by coarse impurities and withdrawn as a suspension.
  • Such a pulper is eg by the EP-A-1 398 410 known.
  • Another open top pulper with a container whose cross-section is not circular shows the FR-A-1 047 321 , Here the sieve is not flat, but conical. It serves to retain the still insufficiently dissolved pulp in the pulper.
  • the standard type for a pulper is a vertical cylindrical container with a rotor in the bottom area.
  • water and the substance to be dissolved is added from above and with the help of the rotor creates a Trombenströmung in the suspension, ie in the inner region of the fabric is pulled down from the rotor and pressed radially outwards in the bottom region, resulting in a Umtriebsströmung results.
  • a Another typical design is the open top pulper container with laterally inserted rotor. Then the suspension is conveyed approximately horizontally to the rotor and deflected on the side wall of the container carrying the rotor. This hydraulically often less favorable form has the advantage of finding space under the paper machine as broke dissolver.
  • An example of a Auschussauflöser shows the DE 101 38 860 A1 ,
  • the previously mentioned sieve initially serves to carry out a separation in which the already sufficiently dissolved fractions of the pulp are drawn off through the openings of the sieve and not yet retained sufficiently dissolved.
  • the dissolution process becomes more economical in a manner known per se; in particular, the pulper can, if desired, be operated continuously. Contaminants, ie essentially non-paper components, are retained or sorted out.
  • EP-A-1 357 222 is a flat screen for performing a Nasssiebungsvons with slot-shaped screen openings known. It is about higher throughput with the same sorting quality. The process is carried out in closed sorters in which a separation of paper and impurities takes place.
  • the sieve but also contributes to pulpers of the type mentioned to enhance the dissolution process.
  • the side of the rotor facing the screen plate interacts with the inlet edges of the screen openings. Although a certain distance between rotor and screen plate is always respected, the shear forces that occur are sufficient to further separate the pulp particles. Larger pieces can also bridge the distance between screen plate and rotor, so that a direct cutting effect occurs.
  • the form and intensity of these processes depends on the requirements and the design of the pulper.
  • WO 03/033152 A1 From the WO 03/033152 A1 is known a screen plate whose openings have been introduced by laser or water jet. These openings are not round, but provided with corners and preferably distributed like a mosaic on the screen plate. This should increase the dissolution effect.
  • the invention is based on the object to improve the known pulpers for the resolution of pulp so that with them the highest possible throughput of dissolved pulp can be achieved without the cost, especially for equipment and operation, rise. In special embodiments, it should also be possible to reduce the equipment costs or the operating costs.
  • the dissolving power of the pulper which results from the interaction of rotor and screen plate, can be increased. Due to the curves, the risk of attaching fiber fins or impurities prone to spinning (plastic films) is very low.
  • the elongated shape also means that a larger free screen surface can be produced at approximately the same screen fineness.
  • edges which form at the inlet into the screen opening, with respect to the dissolution effect.
  • edges can be arranged at a defined angle (cutting angle) to the sweeping past rotor blade edges.
  • FIG. 1 the sieve region of a pulper according to the invention is shown. It can be seen a rotor 2, which is arranged concentrically with an annular flat screen plate 1 in the pulper, not otherwise shown.
  • the rotor 2 is provided with wings 4 and dimensioned so that it completely or at least for the most part sweeps over the screen surface of the screen 3 during rotation (arrow 7).
  • the screen openings 5 of this screen 3 are not circular as usual but elongated.
  • the graphic representation of the screen openings 5 is not to scale here, but should only identify the screen surface. More details about these screen openings is shown in further figures. For larger sieves, it is customary to first produce these as ring segments, which are then assembled in the pulper to form an entire sieve.
  • the whole sieve consists of a total of eight segments, four of which are drawn.
  • the sieve segments are screwed for example with an underlying support frame 8.
  • This can - unlike drawn here - be constructed so that it supports the screen even where there are no Siebsegmentgrenzen. Then it is possible to reduce the screen plate thickness and save costs, especially in the production of the screen openings. 5
  • FIG. 2 shows a possible embodiment of the screen plate a little more detail.
  • 5 slots are selected for the screen openings with the length L and the width B, wherein the curves are semicircular.
  • the length / width ratio UB here is about 4.
  • a length / width ratio of less than 2 for example, 1.7 conceivable.
  • screen openings having a width B between 10 and 20 mm and length L between 20 and 60 mm are to be regarded as a typical embodiment.
  • much smaller screen openings eg with a width B of about 4 mm are provided.
  • Another object of the invention is the adjustment of the optimum cutting angle ⁇ , the between the leading edge 10 of the Rotorflüsgels 4 and the opening edge. 9 the screen openings is formed.
  • This intersection angle ⁇ is in Fig. 2 with 8 ° relatively small, which leads to a strong dissolving effect.
  • the angles may also be different, eg changing depending on the distance to the center of the screen.
  • slot shapes and their arrangement are typical examples of practicing the invention, they are not the only ones. Thus, e.g. also other oval / oblong shapes are chosen.
  • the sieve (according to FIG. 6 In general, then the support plate 12 has the same outer contour as the screen plate 11.
  • the passage openings 13 of the support plate 12 may be uneven and substantially larger than the screen openings 5, since they have no screening effect. Because of the support plate 12, the screen plate 11 can be kept relatively thin, which greatly simplifies the introduction of openings.
  • pulper to which the invention can be applied is the standing cylindrical open-top pulper according to FIG. 7 in which sieve 3 and rotor 2 are located in the bottom area.
  • stock S and water W are introduced into the container 1.
  • the finished pumpable suspension is withdrawn through the sieve 3 as accept A.
  • pulpers have long been known.
  • the same applies to pulpers with side mounted rotors according to FIG. 8 As already mentioned, such a lying container 1 'particularly advantageous under a Paper machine to be used for the dissolution of production committee.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Disintegrating Or Milling (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)

Claims (14)

  1. Pulpeur pour désintégrer et mettre en suspension des matériaux pour pâte à papier (S), comprenant un récipient (1, 1') ouvert en haut et au moins un rotor (2) entraîné disposé dans le récipient (1, 1'), lequel rotor présente des moyens pour faire circuler une suspension contenue dans le récipient afin de désintégrer les matériaux pour pâte à papier introduits et pour les mettre en suspension dans de l'eau, et comprenant aussi au moins un tamis (3) dont la surface de tamis pourvue d'ouvertures de tamis est balayée sur sa majeure partie ou complètement par le rotor en mouvement (2),
    caractérisé en ce que
    le tamis (3) est pourvu d'ouvertures de tamis rondes allongées (5, 5', 5") dont la forme s'écarte de celle d'un cercle.
  2. Pulpeur selon la revendication 1,
    caractérisé en ce que
    les ouvertures de tamis (5) sont ovales, en particulier elliptiques.
  3. Pulpeur selon la revendication 1,
    caractérisé en ce que
    les ouvertures de tamis (5') sont des trous oblongs.
  4. Pulpeur selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le tamis est annulaire et plan et en ce que la longueur (L) des ouvertures de tamis (5, 5', 5") est orientée suivant un angle (α) par rapport au rayon (6) s'étendant à travers le centre du tamis, qui est compris entre -80° et +80°, de préférence entre -45° et +45°.
  5. Pulpeur selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    l'arête avant (10) des pales du rotor (4) est orientée par rapport à la longueur (L) des ouvertures de tamis (5, 5', 5") suivant un angle de coupe (β) compris entre -80° et +80°, de préférence entre -45° et +45°.
  6. Pulpeur selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les ouvertures de tamis (5, 5', 5") présentent un rapport longueur à largeur d'au moins 1,5, de préférence d'au moins 3.
  7. Pulpeur selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la largeur maximale (B) des ouvertures de tamis (5, 5') est comprise entre 4 et 20 mm.
  8. Pulpeur selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la longueur (L) des ouvertures de tamis (5, 5', 5") est comprise entre 10 et 100 mm.
  9. Pulpeur selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le pulpeur présente un rotor monté latéralement et est approprié pour désintégrer le rebut de machines à papier.
  10. Pulpeur selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les ouvertures de tamis (5, 5', 5") sont produites par fraisage.
  11. Pulpeur selon l'une quelconque des revendications 1 à 9,
    caractérisé en ce que
    les ouvertures de tamis (5, 5', 5") sont produites par estampage.
  12. Pulpeur selon l'une quelconque des revendications 1 à 9,
    caractérisé en ce que
    les ouvertures de tamis (5, 5', 5") sont produites par un faisceau laser.
  13. Pulpeur selon l'une quelconque des revendications 1 à 9,
    caractérisé en ce que
    le tamis (3) est fabriqué conjointement avec les ouvertures de tamis (5, 5', 5") dans un procédé de fonte d'acier.
  14. Pulpeur selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le tamis se compose d'une plaque perforée (11) présentant les ouvertures de tamis (5, 5', 5") et d'une plaque de support (12), la plaque de support (12) étant une construction de cadre ou de tamis grossière, dont le contour extérieur correspond essentiellement à celui de la plaque perforée (11) et qui est pourvue d'ouvertures de passage (13) qui sont plus grosses que les ouvertures de tamis (5, 5', 5").
EP05023603A 2005-01-11 2005-10-28 Pulpeur pour désintégrer et mettre en suspension des matériaux pour pâte à papier Active EP1679403B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200520000332 DE202005000332U1 (de) 2005-01-11 2005-01-11 Stofflöser zur Zerkleinerung und Suspendierung von Papierstoff

Publications (2)

Publication Number Publication Date
EP1679403A1 EP1679403A1 (fr) 2006-07-12
EP1679403B1 true EP1679403B1 (fr) 2008-03-05

Family

ID=34353846

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05023603A Active EP1679403B1 (fr) 2005-01-11 2005-10-28 Pulpeur pour désintégrer et mettre en suspension des matériaux pour pâte à papier

Country Status (4)

Country Link
EP (1) EP1679403B1 (fr)
AT (1) ATE388266T1 (fr)
DE (2) DE202005000332U1 (fr)
ES (1) ES2300923T3 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102119248A (zh) * 2008-08-11 2011-07-06 沃依特专利有限责任公司 用于分馏纤维悬浮液的装置
DE202009017951U1 (de) 2009-10-13 2010-10-21 Voith Patent Gmbh Stofflöser
EP2616584B1 (fr) * 2010-09-17 2016-03-09 Hans-Joachim Boltersdorf Désintégrateur pourvu d'une plaque de tamisage
CH708421A8 (de) 2013-02-28 2015-05-15 Dissolvetech Ag Datenträgervernichtungsverfahren, Sammelfahrzeug und Verwendung einer Auflösevorrichtung.
DE102016202586A1 (de) 2016-02-19 2017-08-24 Voith Patent Gmbh Stofflöser
CN107476108A (zh) * 2017-09-30 2017-12-15 枣庄市恒宇纸业有限公司 一种造纸用新型分级筛
DE102018109634A1 (de) 2018-04-23 2019-10-24 Voith Patent Gmbh Stoffauflöser
CN108625213B (zh) * 2018-05-29 2020-10-30 新昌县康泓机械科技有限公司 一种造纸打浆机
FI20185942A (fi) * 2018-11-06 2020-05-07 Valmet Technologies Oy Seulalevy, pulpperi, prosessi ja menetelmä kuitumassasuspension valmistamiseksi
CN113680116A (zh) * 2021-09-01 2021-11-23 安德里茨（中国）有限公司 筛板及筛浆机

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1047321A (fr) * 1951-12-28 1953-12-14 Appareil pour la désintégration des celluloses et des vieux papiers
DE10138860A1 (de) * 2001-08-08 2003-02-27 Voith Paper Patent Gmbh Verfahren zur Suspensionsführung in einem Papierstofflöser sowie Papierstofflöser zur Durchführung des Verfahrens
DE10217926A1 (de) * 2002-04-23 2003-11-13 Voith Paper Patent Gmbh Verfahren zum Nasssieben von Faserstoffsuspensionen
FR2844532B1 (fr) * 2002-09-12 2004-11-05 Kadant Lamort Desintegrateur papetier

Also Published As

Publication number Publication date
ATE388266T1 (de) 2008-03-15
ES2300923T3 (es) 2008-06-16
EP1679403A1 (fr) 2006-07-12
DE202005000332U1 (de) 2005-03-17
DE502005003085D1 (de) 2008-04-17

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