WO2012084562A1 - Trieuse à pression - Google Patents

Trieuse à pression Download PDF

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Publication number
WO2012084562A1
WO2012084562A1 PCT/EP2011/072405 EP2011072405W WO2012084562A1 WO 2012084562 A1 WO2012084562 A1 WO 2012084562A1 EP 2011072405 W EP2011072405 W EP 2011072405W WO 2012084562 A1 WO2012084562 A1 WO 2012084562A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
rotor blades
pressure sorter
sorter according
rotation
Prior art date
Application number
PCT/EP2011/072405
Other languages
German (de)
English (en)
Inventor
Werner Brettschneider
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 WO2012084562A1 publication Critical patent/WO2012084562A1/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 into a Zulaufraum and a Acceptance space, the Zulaufraum with a suspension inlet and a Rejektauslauf and the Gutstoffraum with a Gutstoffablauf is connected and in the
  • Siebachse corresponds and rotates relative to the screen element, wherein the rotor blades have the same shape and over several perpendicular to the axis of rotation
  • Pressure sorters are used in the reprocessing of paper pulp suspensions, namely around the pulp suspension in a wet sieving
  • such a pressure sorter includes a sieve element which is provided with a plurality of openings.
  • the fibers contained in the suspension should pass through the openings as accept, while not
  • 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 Strainer basket extends. Due to the relative movement to the surrounding suspension, the wing element at the front gives a pressure and behind it a suction pulse onto the sieve to be cleared. 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 formed for example in DE-OS 3701669 of surveys. Irrespective of the design of the rotor blades, in practice a comprehensive effect of the rotor blades is sought by overlapping them in the circumferential direction. The same design of the rotor blades provides for a
  • the object of the invention is therefore to reduce the energy consumption and wear in pressure graders without significantly affecting their function.
  • the object has been achieved in that a plurality of rotor blades are arranged in a circumferential plane and between the rotor blades adjacent circumferential planes is a perpendicular to the axis of rotation rotor blade gap level.
  • the circumferential planes considered here like the rotor blade gap planes, have a certain extent parallel to the roatation axis.
  • the rotor blade gap plane has a width parallel to the axis of rotation, which is between 5 and 50 mm, preferably between 10 and 25 mm.
  • the rotor blades of a circumferential plane may have different widths or equal width transversely to the direction of rotation.
  • the rotor blades may have a wing profile or be formed as projections on the rotor.
  • Clearing elements generate pressure and suction pulses at the sieve openings, whereby the suction pulses serve to evacuate, that is to say sieve-free.
  • Another possibility is the setting up of surveys.
  • the rotor main body not with a round cross section, but oval or in the form of a rounded polygon, e.g. Triangle, so to provide it with an outer contour, which has a different distance from the center of the rotor.
  • the running in the direction of rotation of the rotor cross-sectional area of the rotor blades can be adapted to the requirements and advantageously limited by curved sections or polygonal, preferably formed as a quadrangle.
  • the rotor blades In order to produce a gentle transverse flow in the rotor blade gap plane, it is advantageous if the rotor blades have at least one approximately in the direction of rotation extending side surface which is at an angle with the axis of rotation between 45 and 90 ° and / or forms an angle between 10 and 30 ° with the direction of rotation.
  • Transverse flow across the rotor blade gap planes is also promoted by gravity, as long as the axis of rotation is oblique or perpendicular to the machine plane.
  • Screen element cylindrical and the rotor are formed as a cylindrical drum.
  • FIG. 1 shows a schematic cross section through a pressure sorter
  • Figure 2 a cross section through a rotor blade 6 in the direction of rotation 14;
  • FIG. 3 shows a cross section through a rotor blade 6 transversely to the direction of rotation 14;
  • Figure 4 a rotor blade 6 with airfoil and
  • FIGS. 5-7 a rotor cutout with rotor blades 6.
  • FIG. 1 shows a pressure sorter according to the invention with a
  • Sieve element 2 here in the form of a cylindrical screen basket with vertical
  • Siebachse 10 which divides the interior of the pressure sorter into an inlet space 3 and an accepts space 4.
  • the pulp suspension 1 is fed via a suspension feed.
  • the pulp suspension 1 receives an angular momentum which causes it to move circumferentially. In addition to this, due to the applied pressure gradient between the above drawn
  • Suspension feed 1 1 and the underlying Rejektauslauf 12 of the feed chamber 3 generates a transport flow.
  • 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 clearer is formed by a rotor 5 rotating in the screen element 2 with rotor blades 6 attached thereto.
  • the rotor 5 has the shape of a cylindrical drum, wherein the axis of rotation 7 coincides with the Siebachse 10.
  • All rotor blades 6 in this case have the same shape, which leads to a uniform effect on the pulp suspension 1 and the filter element 2.
  • the rotor blades 6 are arranged distributed over a plurality of perpendicular to the rotation axis 7 extending circumferential planes 8 of the rotor 5. It is essential, however, that a plurality of rotor blades 6 are arranged in a circumferential plane 8 and between the rotor blades 6 adjacent circumferential planes 8 a perpendicular to
  • Rotation axis 7 extending rotor blade gap level 9 is.
  • the rotor blade gap plane 9 is the cross flows between the
  • Rotor blade gap plane 9 parallel to the axis of rotation 7 considered between 10 and
  • the rotor blades 6 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 14 of the rotor 5 cross-sectional area of the rotor blades 6 is formed as a rectangle. Because of the rotor blade gap plane 9, ie the lack of overlap
  • Level 8 are significantly reduced.
  • the rotor blades 6 extend in the circumferential direction so far that only between 38 and 45% of the circumference of a circumferential plane 8 the rotor blades 6 are covered.
  • the rotor blades 6 have not only the same shape but also the same dimensions, which reduces the manufacturing cost. This cover the
  • Rotor blades 6 a circumferential plane 8 in the direction of rotation 14 completely.
  • Rotation direction 14 steeply, then drop gradually.
  • Figure 3 shows the cross section of the rotor blade according to Figure 1 perpendicular to
  • both side surfaces 15 of the rectangular rotor blade 6 extending in the direction of rotation 14 form an angle 16 of approximately 60 ° with the axis of rotation 7. These side surfaces 15 should gently cause a transverse flow in the direction of the respective rotor blade gap plane 9.
  • Figure 4 shows a rotor wing 6 with Taghofflprofil, i.
  • hydrodynamic flow profile which is attached to the rotor 5 at a radial distance.
  • the rotor blades 6 in FIG. 5 are in turn designed as elevations whose cross-sectional area of the rotor blades 6 extending in the direction of rotation 14 of the rotor 5 is, however, limited by curved sections. This can reduce turbulence.
  • the rotor blades 6 a peripheral plane 8 in the rotational direction 14 slightly offset from each other to order.
  • the elevation has a cross-sectional area in the direction of rotation 14 of the rotor 5 in the form of a parallelogram, in which two side surfaces 15 are inclined in the direction of rotation 14 and the other two are inclined with respect to the direction of rotation 14 at an angle between 40 and 80 °.
  • Rotation direction 14 different widths.

Landscapes

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

Abstract

L'invention concerne une trieuse à pression pour le nettoyage d'une suspension de matière fibreuse (1) comprenant un élément de tamis (2) conçu à symétrie de rotation autour d'un axe de tamis (10), qui divise la trieuse à pression en un espace d'arrivée (3) et un espace de pâte à papier finie (4), l'espace d'arrivée (3) étant en liaison avec une arrivée de suspension (11) et une sortie de rejet (12) et l'espace de pâte à papier finie (4) avec une évacuation de pâte à papier finie (13) et un rotor (5) doté d'ailettes (6) se trouvant dans l'espace d'arrivée (3), rotor dont l'axe de rotation (7) correspond à l'axe de tamis (10) et qui tourne par rapport à l'élément de tamis (2), les ailettes de rotor (6) ayant la même forme et étant disposées de façon répartie sur plusieurs niveaux périphériques (8), agencés perpendiculairement à l'axe de rotation (7), du rotor (5). Dans le cas présent, l'absorption d'énergie et l'usure doivent être réduites par le fait que plusieurs ailettes de rotor (6) sont disposées dans un plan périphérique (8) et un plan interstitiel d'ailette de rotor (9), agencé perpendiculairement à l'axe de rotation (7), existe entre les ailettes de rotor (6) de plans périphériques (8) voisins.
PCT/EP2011/072405 2010-12-22 2011-12-12 Trieuse à pression WO2012084562A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010063891.9 2010-12-22
DE201010063891 DE102010063891A1 (de) 2010-12-22 2010-12-22 Drucksortierer

Publications (1)

Publication Number Publication Date
WO2012084562A1 true WO2012084562A1 (fr) 2012-06-28

Family

ID=45375298

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/072405 WO2012084562A1 (fr) 2010-12-22 2011-12-12 Trieuse à pression

Country Status (2)

Country Link
DE (1) DE102010063891A1 (fr)
WO (1) WO2012084562A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2754749A1 (fr) * 2013-01-10 2014-07-16 Aikawa Iron Works Co., Ltd. Appareil de tamisage pour la fabrication de papier
CN104532652A (zh) * 2014-12-10 2015-04-22 新乡航空工业(集团)新平机械有限公司 压力筛转子、其圆筒体与旋翼的定位方法及压力筛
AT518213A1 (de) * 2016-02-03 2017-08-15 Andritz Ag Maschf Rotorflügel und sortierer mit rotorflügel
CN108468245A (zh) * 2018-05-30 2018-08-31 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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012220330A1 (de) * 2012-11-08 2014-05-08 Voith Patent Gmbh Drucksortierer

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3701669A1 (de) 1987-01-22 1988-08-04 Voith Gmbh J M Sortierfluegel
US4832832A (en) * 1984-12-25 1989-05-23 Mitsubishi Jukogyo Kabushiki Kaisha Pressure type slit screen
US5192438A (en) * 1983-03-07 1993-03-09 A. Ahlstrom Corporation Rotating element for screening apparatus with a contour surface produced by a plurality of protrusions in the direction of the axial length of the rotor
WO1998053135A1 (fr) 1997-05-21 1998-11-26 Valmet Corporation Agencement de racle pour appareil d'epuration de pate
EP1036879A1 (fr) * 1999-03-17 2000-09-20 Voith Sulzer Papiertechnik Patent GmbH Tamis sous pression pour suspensions fibreuses et un rotor de nettoyage pour un tel tamis
DE20304303U1 (de) * 2003-03-18 2004-07-22 Voith Paper Patent Gmbh Drucksortierer zum Sieben einer Papierfaserstoffsuspension und Siebräumer für einen solchen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5192438A (en) * 1983-03-07 1993-03-09 A. Ahlstrom Corporation Rotating element for screening apparatus with a contour surface produced by a plurality of protrusions in the direction of the axial length of the rotor
US4832832A (en) * 1984-12-25 1989-05-23 Mitsubishi Jukogyo Kabushiki Kaisha Pressure type slit screen
DE3701669A1 (de) 1987-01-22 1988-08-04 Voith Gmbh J M Sortierfluegel
WO1998053135A1 (fr) 1997-05-21 1998-11-26 Valmet Corporation Agencement de racle pour appareil d'epuration de pate
EP1036879A1 (fr) * 1999-03-17 2000-09-20 Voith Sulzer Papiertechnik Patent GmbH Tamis sous pression pour suspensions fibreuses et un rotor de nettoyage pour un tel tamis
DE20304303U1 (de) * 2003-03-18 2004-07-22 Voith Paper Patent Gmbh Drucksortierer zum Sieben einer Papierfaserstoffsuspension und Siebräumer für einen solchen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
FACHAUFSATZ R. RIENECKER: "Sortierung - ein Werkzeug zur Sticky-Entfernung: Maschinen", WOCHENBLATT FÜR PAPIERFABRIKATION, 1997, pages 787 - 793,855-859

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2754749A1 (fr) * 2013-01-10 2014-07-16 Aikawa Iron Works Co., Ltd. Appareil de tamisage pour la fabrication de papier
KR101924348B1 (ko) * 2013-01-10 2018-12-03 아이카와 뎃코 가부시키가이샤 제지용 스크린 장치
CN104532652A (zh) * 2014-12-10 2015-04-22 新乡航空工业(集团)新平机械有限公司 压力筛转子、其圆筒体与旋翼的定位方法及压力筛
AT518213A1 (de) * 2016-02-03 2017-08-15 Andritz Ag Maschf Rotorflügel und sortierer mit rotorflügel
AT518213B1 (de) * 2016-02-03 2018-06-15 Andritz Ag Maschf Rotorflügel und sortierer mit rotorflügel
US10724175B2 (en) 2016-02-03 2020-07-28 Andritz Ag Rotor blade and screen comprising a rotor blade
CN108468245A (zh) * 2018-05-30 2018-08-31 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
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

Also Published As

Publication number Publication date
DE102010063891A1 (de) 2012-06-28

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