EP2732094B1 - Classeur sous pression - Google Patents

Classeur sous pression Download PDF

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Publication number
EP2732094B1
EP2732094B1 EP12729158.1A EP12729158A EP2732094B1 EP 2732094 B1 EP2732094 B1 EP 2732094B1 EP 12729158 A EP12729158 A EP 12729158A EP 2732094 B1 EP2732094 B1 EP 2732094B1
Authority
EP
European Patent Office
Prior art keywords
suspension
screen
rotor
inlet
flow direction
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
EP12729158.1A
Other languages
German (de)
English (en)
Other versions
EP2732094A1 (fr
Inventor
Martin Störzer
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
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Filing date
Publication date
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP2732094A1 publication Critical patent/EP2732094A1/fr
Application granted granted Critical
Publication of EP2732094B1 publication Critical patent/EP2732094B1/fr
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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

Definitions

  • the invention relates to a pressure sorter for cleaning a pulp suspension with a Siebense rotationally symmetrical trained sieve element, which divides the pressure sorter in a Zulaufraum and a Acceptance space, the Zulaufraum with a suspension inlet and a Rejektauslauf and the Gutstoffraum with a Gutstoffablauf in connection and is in Zulaufraum a rotor is located with rotor blades whose axis of rotation corresponds to the Siebachse and rotates relative to the screen element.
  • Pressure screens are used in the processing of paper pulp suspensions, in order to process the pulp suspension in a wet sieving.
  • the fibers contained in the suspension are to pass through the openings as accept, while the unwanted solid constituents are rejected thereon and discharged as a reject again from the sorter. It is also conceivable to use for the separation of different fiber components, so the shorter of the longer fibers.
  • sorting holes round holes or slots are usually used.
  • pressure sorters of the type considered here are provided with screen scrapers having reaming surfaces moved past the screen. As a result, clogging of the screen openings is prevented in a manner known per se.
  • a Sieb thriftr become known, which is provided with wing elements for the clearance of the screen.
  • These wing elements have a hydrodynamic profile which extends over the entire length of the screen element of a screen basket. Due to the relative movement to the surrounding suspension, the wing element at the front gives a pressure and, behind it, a suction pulse clearing sieve. Thereby, a part of the suspension, which was rejected on the screen or has already passed through the screen as accepts, sucked back, whereby the screen openings are kept free or cleared.
  • the rotor blades are for example in the DE-OS 3701669 formed by surveys.
  • the object of the invention is therefore to reduce energy consumption and pulsations.
  • this object is achieved in that the distance between the axis of rotation and in the flow direction through the centroid of the perpendicular to the flow direction extending cross-sectional area of the suspension inlet going straight line is less than 1.0 times, preferably less than 0.7 times the radius of the screen element.
  • the suspension Since the suspension is not injected tangentially, it also has no or at least a reduced rotational flow when entering the inlet space. Consequently, exclusively or predominantly the rotor is responsible for generating the rotational flow in the inlet space.
  • the flow direction forms an angle of at least 10 °, preferably at least 20 ° and in particular at least 35 ° with all tangents on the screen element in the region of the suspension feed.
  • the suspension inlet In order to change the position of the centroid of the perpendicular to the flow direction extending cross-sectional area of the suspension inlet, the suspension inlet should have a flow cross section influencing, preferably adjustable aperture.
  • the flow direction in the suspension feed runs horizontally or inclined from above directly in front of the feed space, wherein the flow direction with the horizontal forms an angle between 0 and 90 °, preferably between 0 and 60 °.
  • the distance between the axis of rotation and the straight line passing in the flow direction through the centroid of the cross-sectional area of the suspension feed running perpendicular to the flow direction can be zero or greater than zero.
  • the axis of rotation should stand vertically.
  • other orientations, for example, lying arrangements are possible.
  • FIG. 1 can be seen a pressure sorter according to the invention with a screen element 2, here in the form of a cylindrical screen basket with vertical Siebachse 10, which divides the interior of the pressure sorter in an inlet space 3 and an accepts space 4.
  • a screen element 2 here in the form of a cylindrical screen basket with vertical Siebachse 10, which divides the interior of the pressure sorter in an inlet space 3 and an accepts space 4.
  • the pulp suspension 1 is fed via a suspension feed 11.
  • the rejected from the screening element 2 part of the pulp suspension 1 is conveyed as a reject 18 via the Rejektauslauf 12 from the inlet space 3.
  • this sieve scraper is formed by a rotor 5 rotating in the screen element 2 with rotor blades attached thereto.
  • the rotor 5 here has the form of a cylindrical drum, the axis of rotation 7 coincides with the Siebachse 10.
  • the rotor blades are arranged distributed over a plurality of perpendicular to the rotation axis 7 extending circumferential planes of the rotor 5.
  • the rotor blades are formed as elevations on the rotor 5, which accordingly have no radial distance to the rotor 5.
  • the running in the direction of rotation 16 of the rotor 5 cross-sectional area of the rotor blades is formed as a rectangle.
  • the rotor blades can also be designed differently, for example with a wing profile.
  • the pulp suspension 1 receives no or only a reduced angular momentum. This makes it possible to operate the rotor 5 at a lower speed, so that on the one hand less energy is required and on the other hand, lower pulsations emanate from the rotor 5.
  • the flow direction 14 forms on the suspension feed 11 with each tangent on the screen element 2 an angle 19 of at least 10 °, preferably at least 20 ° and in particular at least 35 °.
  • the suspension feed 11 can accordingly FIG. 4 have a flow cross-section changing, preferably adjustable aperture 8.

Landscapes

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

Claims (8)

  1. Appareil de tamisage sous pression destiné à nettoyer une suspension fibreuse (1), comprenant un élément de tamis (2) réalisé avec une symétrie de révolution autour d'un axe de tamis (7), qui divise l'appareil de tamisage sous pression en un espace d'alimentation (3) et un espace de matière acceptée (4), l'espace d'alimentation (3) étant en liaison avec une alimentation en suspension (11) ainsi qu'avec une sortie de rejet (12) et l'espace de matière acceptée (4) étant en liaison avec un écoulement de sortie de matière acceptée (13) et un rotor (5) avec des pales de rotor se trouvant dans l'espace d'alimentation (3), l'axe de rotation (10) du rotor correspondant à l'axe de tamis (7) et le rotor tournant par rapport à l'élément de tamis (2), caractérisé en ce que la distance (15) entre l'axe de rotation (10) et la droite passant dans la direction d'écoulement (14) à travers le barycentre (6) de la surface en section transversale de l'alimentation en suspension (11) s'étendant perpendiculairement à la direction d'écoulement (14) est supérieure à 0 et est inférieure à 1,0 fois, de préférence inférieure à 0,7 fois le rayon de l'élément de tamis (2).
  2. Appareil de tamisage sous pression selon la revendication 1, caractérisé en ce que la direction d'écoulement (14) au niveau de l'alimentation en suspension (11) forme avec une tangente à l'élément de tamis (2) un angle (19) d'au moins 10°.
  3. Appareil de tamisage sous pression selon la revendication 1 ou 2, caractérisé en ce que la direction d'écoulement (14) au niveau de l'alimentation en suspension (11) forme avec une tangente à l'élément de tamis (2) un angle (19) d'au moins 20°, de préférence d'au moins 35°.
  4. Appareil de tamisage sous pression selon l'une quelconque des revendications précédentes, caractérisé en ce que la direction d'écoulement (14) forme, dans l'alimentation en suspension (11) directement avant l'espace d'alimentation (3), avec l'horizontale un angle (9) compris entre 0 et 90°, de préférence entre 0 et 60°.
  5. Appareil de tamisage sous pression selon l'une quelconque des revendications précédentes, caractérisé en ce que l'alimentation en suspension (11) possède un diaphragme (8), de préférence réglable, influençant la section transversale d'écoulement.
  6. Appareil de tamisage sous pression selon l'une quelconque des revendications précédentes, caractérisé en ce que l'axe de rotation (10) est vertical.
  7. Appareil de tamisage sous pression selon l'une quelconque des revendications précédentes, caractérisé en ce que le rotor (5) se trouve à l'intérieur de l'élément de tamis (2).
  8. Appareil de tamisage sous pression selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément de tamis (2) est réalisé sous forme cylindrique.
EP12729158.1A 2011-07-15 2012-06-26 Classeur sous pression Active EP2732094B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011079230A DE102011079230A1 (de) 2011-07-15 2011-07-15 Drucksortierer
PCT/EP2012/062287 WO2013010755A1 (fr) 2011-07-15 2012-06-26 Classeur sous pression

Publications (2)

Publication Number Publication Date
EP2732094A1 EP2732094A1 (fr) 2014-05-21
EP2732094B1 true EP2732094B1 (fr) 2018-02-28

Family

ID=46331350

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12729158.1A Active EP2732094B1 (fr) 2011-07-15 2012-06-26 Classeur sous pression

Country Status (4)

Country Link
EP (1) EP2732094B1 (fr)
CN (1) CN103687991B (fr)
DE (1) DE102011079230A1 (fr)
WO (1) WO2013010755A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108203890A (zh) * 2017-12-21 2018-06-26 黄蒋元 筛浆机
CN110158345A (zh) * 2018-09-28 2019-08-23 江门欧佩德晶华轻工机械有限公司 智能压力筛
DE102018127914A1 (de) * 2018-11-08 2020-05-14 Voith Patent Gmbh Rotor für ein Heizaggregat

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3581893A (en) * 1968-01-02 1971-06-01 Improved Machinery Inc Screening apparatus
SE358429B (fr) * 1969-06-10 1973-07-30 Sunds Ab
DE2526657C3 (de) * 1975-06-14 1978-10-26 Hermann Finckh, Maschinenfabrik, 7417 Pfullingen Drucksichter für Fasersuspensionen
AT368560B (de) * 1981-02-18 1982-10-25 Andritz Ag Maschf Sortierer
DE3663700D1 (en) * 1986-07-15 1989-07-06 Finckh Maschf Pressure separator
DE3701669A1 (de) 1987-01-22 1988-08-04 Voith Gmbh J M Sortierfluegel
FI83892C (fi) * 1989-06-05 1991-09-10 Tampella Oy Ab Trycksil.
FI102980B1 (fi) 1997-05-21 1999-03-31 Valmet Corp Siipisovitelma kuitumassan lajittelulaitetta varten
SE9901148L (sv) * 1999-03-29 2000-06-12 Valmet Fibertech Ab Silanordning med ett roterbart och ett stationärt silorgan
AT408772B (de) * 2000-02-03 2002-03-25 Andritz Ag Maschf Sortierer zur reinigung einer faserstoffsuspension

Also Published As

Publication number Publication date
CN103687991A (zh) 2014-03-26
EP2732094A1 (fr) 2014-05-21
CN103687991B (zh) 2016-08-17
WO2013010755A1 (fr) 2013-01-24
DE102011079230A1 (de) 2013-01-17

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