EP0523313B1 - Elément pour éporateur - Google Patents

Elément pour éporateur Download PDF

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Publication number
EP0523313B1
EP0523313B1 EP92102068A EP92102068A EP0523313B1 EP 0523313 B1 EP0523313 B1 EP 0523313B1 EP 92102068 A EP92102068 A EP 92102068A EP 92102068 A EP92102068 A EP 92102068A EP 0523313 B1 EP0523313 B1 EP 0523313B1
Authority
EP
European Patent Office
Prior art keywords
sieve
rods
gap
screen
parallel
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.)
Expired - Lifetime
Application number
EP92102068A
Other languages
German (de)
English (en)
Other versions
EP0523313A1 (fr
Inventor
Norbert Einöder
Waldemar R. Knodel
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.)
Fiedler Heinrich GmbH and Co KG
Original Assignee
Fiedler Heinrich GmbH and Co KG
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 Fiedler Heinrich GmbH and Co KG filed Critical Fiedler Heinrich GmbH and Co KG
Publication of EP0523313A1 publication Critical patent/EP0523313A1/fr
Application granted granted Critical
Publication of EP0523313B1 publication Critical patent/EP0523313B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D21D5/16—Cylinders and plates for screens

Definitions

  • the invention relates to a sieve element, in particular for sorting / classifying, in particular fiber suspensions, consisting of a plurality of parallel rods connected to one another by cross bars, which form a sieve surface, between which slit-shaped sieve gaps are formed, which run essentially transversely to the main inflow direction of the fiber suspension , and furthermore each rod is provided with flat side surfaces which adjoin the end face and extend transversely to the sieve surface and form the sieve gap of two adjacent rods.
  • Such a screen element is known from DE-A-33 27 422.
  • the object of the invention is now to further reduce the wear on the rods and thereby further increase the service life of the rods.
  • this is achieved in that the side walls delimiting the screen gap run parallel and so are formed so that - seen in the direction of flow through the screen gap - the downstream edge C of the side wall of the preceding rod lies in front of the downstream edge B of the side wall of the following rod.
  • the depth of the screen gap delimited by the parallel side walls or in other words the overlap of the parallel side surfaces of the bars delimiting the screen gap is approximately 0.2-0.8, in particular approximately 0.5 mm.
  • the distance T measured in the direction of flow through the screen gap between the downstream edge C of the preceding bar and the downstream edge B of the following bar is preferably approximately 1.0-2.0 times and in particular approximately 1.0-1.5 times the parallel overlap Ü of the two bars.
  • the parallel side surfaces are followed by inclined side surfaces, which form an acute angle of approximately 10-25 ° to a perpendicular to the screen surface, the angle ⁇ 1 preferably being approximately 15 ° and the angle ⁇ 2 preferably being approximately 20 °.
  • the end face of the rods can run parallel to the sieve surface, but preferably it runs at an acute angle ⁇ to the sieve surface, which can be approximately 10-30 °, in particular approximately 15 °.
  • the figure shows two adjacent rods 12 which form part of a sieve element, for example a sieve basket.
  • the central axes 44 of the two rods 12 run at an angle of 90 ° to the sieve surface 22 of the sieve basket, which is otherwise not shown.
  • the end faces 18 of the rods can run parallel to the sieve surface 22, but in the embodiment shown they form an acute angle ⁇ to the sieve surface 22, which can be approximately 10-30 °, preferably approximately 15 °.
  • the two rods 12 are delimited on their two longitudinal sides by two flat side surfaces 24 and 26 which extend from the ends of their end surfaces 18 and extend in the direction of the flow direction of the screen gap 16 indicated by the arrow P.
  • the two side surfaces 24 and 26 run transversely to the screen surface 22 and thus parallel to the central planes 44 of the bars 12 and parallel to the central plane 38 of the screen gap 16, which is formed between the two adjacent bars 12.
  • the rods 12 are also each delimited by two side surfaces 28 and 30, which form the angles ⁇ 1 and ⁇ 2 with a perpendicular to the screen surface 22 and thus also with the central planes 44 and the central plane 38.
  • the screen gap is limited by the side surface 26 of the left rod 12, the side surface 24 of the right rod 12, which run parallel to each other, and by the side surface 30 of the left rod 12 and the side surface 28 of the right rod 12, which the aforementioned angles ⁇ 1 and ⁇ 2 form the central plane 38 of the screen gap 16.
  • the parallel surfaces 24 and 26 delimiting the screen gap 16 are offset from one another in the flow direction P.
  • the side surface 26 is offset in the flow direction P against the side surface 24.
  • the two side surfaces 24 and 26, which delimit and form the screen gap 16 overlap by the dimension U, whereby, as the figure shows, the edge A of the left bar (formed by the intersection of the surfaces 26 and 18) before the edge C (formed by the intersection of the surfaces 28 and 24) of the right rod 12 lies.
  • the parallel screen gap 16 thus extends in the flow direction P from the edge A of the left rod 12 to the edge C of the right rod 12.
  • the overlap Ü can be a few tenths of a millimeter to approximately 1 millimeter, preferably approximately 0.2-0.8 mm and particularly preferably approximately 0.5 mm, viewed in the flow direction P.
  • the side surface 26 of the left rod 12 (which is the following rod in relation to the direction of rotation of the rotor indicated by the arrow) extends further in the direction of the arrow P than the side surface 24 of the right rod 12 (which relates to FIG the working direction of the rotor indicated by the arrow is the preceding rod).
  • the downstream edge B of the left rod 12 (formed by the intersection of the surfaces 26 and 30) extends by the dimension T further in the direction of the flow direction of the screen gap 16 indicated by the arrow P than the downstream edge C of the right rod 12, which is formed by the intersection of the side surfaces 24 and 28 of the right rod 12.
  • the dimension T can be approximately 1.0-2.0 times and in particular approximately 1.0-1.5 times the overlap Ü of the two parallel side surfaces 24 and 26. (If the end faces 18 of the rods 12, which is not shown here, run parallel to the sieve surface 22, then the side surface 26 of the left rod 12, viewed in the direction of flow P, is longer by the dimension T than the side surface 24 of the right rod 12) .
  • the gap width of the screen gap 16 remains constant until the edge A, that is to say the cutting line between the surfaces 18 and 26, comes to lie deeper than the edge C.
  • the gap width also only increases here with further wear slowly, because there is also the surface 26 of the left rod 12, which is also parallel to the central plane 38 and extends to the downstream edge B.
  • the screen gap is therefore only widened due to the inclination of the surface 28 of the right rod 12. The widening of the screen gap is thus reduced by the side surface 26, which forms a wear surface and runs parallel to the direction of flow.
  • the angles ⁇ 1 and ⁇ 2 are preferably about 15 °. Increasing the angle ⁇ 2 to about 20 ° leads to a somewhat faster expansion of the screen gap, but it has been shown that the flow resistance could be reduced as a result.
  • the bar width b can be approximately 1.5-4 mm and the bar height H approximately 2.5-7 mm.
  • the height h results from the bar width B and the angle ⁇ .
  • the gap width of the screen gap is approximately in the range from 0.05 to approximately 1 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Paper (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Claims (8)

  1. Elément de tamisage ou panier de tamisage, en particulier pour trier/classer, en particulier des suspensions fibreuses, constitué d'une multiplicité de barreaux (12) parallèles qui sont reliés l'un à l'autre par des barres transversales et qui forment une surface de tamisage (22), entre lesquels sont formés des intervalles de tamisage (16) en forme de fentes qui sont essentiellement perpendiculaires à la direction principale (7) du courant de la suspension fibreuse, chaque barreau (12) ayant des surfaces latérales plates (24, 26) qui se raccordent à sa surface frontale (18), qui sont perpendiculaires à la surface de tamisage et qui créent un intervalle de tamisage (16) entre deux barreaux (12) voisins, caractérisé en ce que les surfaces latérales (24, 26) des barreaux (12) délimitant un intervalle de tamisage (16) sont parallèles au sens du courant (P) dans l'intervalle de tamisage (16) et faites de façon qu'à l'intervalle de tamisage (16), le bord de sortie aval (C) de la surface latérale (24) du barreau (12) précède le bord de sortie aval (B) de la surface latérale (26) du barreau (12) suivant.
  2. Elément de tamisage suivant la revendication 1, caractérisé en ce que le chevauchement (U) des surfaces latérales parallèles (24, 26) des barreaux (12) délimitant l'intervalle de tamisage (16) est d'environ 0,2 à 0,8 mm, particulièrement de 0,5 mm environ.
  3. Elément de tamisage suivant la revendication 2, caractérisé en ce que la distance (T), mesurée dans le sens de passage du courant de l'intervalle de tamisage (16), entre le bord aval (C) du barreau (12) et le bord aval (B) du barreau (12) suivant vaut environ 1,0 à 1,2 fois le chevauchement (U), particulièrement environ 1,0 à 1,5 fois.
  4. Elément de tamisage suivant l'une des revendications 1 à 3, caractérisé en ce qu'aux surfaces latérales parallèles (24, 26) des barreaux (12) se raccordent des surfaces latérales obliques (28, 30) qui font avec la perpendiculaire à la surface de tamisage (22) un angle aigu (φ₁) ou (φ₂).
  5. Elément de tamisage suivant la revendication 4, caractérisé en ce que l'angle (φ₁) est d'environ 10 à 25°, de préférence de 15° environ.
  6. Elément de tamisage suivant la revendication 4, caractérisé en ce que l'angle (φ₂) est d'environ 10 à 25°, de préférence de 20° environ.
  7. Elément de tamisage suivant l'une des revendications précédentes, caractérisé en ce que la surface frontale (18) des barreaux (12) fait un angle aigu (β) avec la surface de tamisage (22).
  8. Elément de tamisage suivant la revendication 7, caractérisé en ce que l'angle (β) entre la surface de tamisage (22) et la surface frontale (18) des barreaux est d'environ 10 à 30°, particulièrement de 15° environ.
EP92102068A 1991-07-02 1992-02-07 Elément pour éporateur Expired - Lifetime EP0523313B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4121897A DE4121897A1 (de) 1991-07-02 1991-07-02 Siebelement
DE4121897 1991-07-02

Publications (2)

Publication Number Publication Date
EP0523313A1 EP0523313A1 (fr) 1993-01-20
EP0523313B1 true EP0523313B1 (fr) 1995-11-29

Family

ID=6435271

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92102068A Expired - Lifetime EP0523313B1 (fr) 1991-07-02 1992-02-07 Elément pour éporateur

Country Status (5)

Country Link
US (1) US5255790A (fr)
EP (1) EP0523313B1 (fr)
AT (1) ATE130889T1 (fr)
CA (1) CA2072771C (fr)
DE (2) DE4121897A1 (fr)

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE501273C2 (sv) * 1993-05-14 1994-12-19 Knutsilplaotar Ab Siltrumma för silning av suspensioner av lignocellulosahaltigt fibermaterial
DE4324662A1 (de) * 1993-07-22 1995-01-26 Voith Gmbh J M Sieb
US5513757A (en) * 1994-06-02 1996-05-07 Sulzer Papertec Mansfield Inc. Continuous cut slotted screen basket
JP3207702B2 (ja) * 1995-04-04 2001-09-10 三菱重工業株式会社 ローラミル用回転式分級機
US5705069A (en) * 1995-08-02 1998-01-06 Harusuke Naito Centrifugal water treatment device
US5708391A (en) * 1996-05-02 1998-01-13 Altmann; Michael High frequency differential filter with CMOS control
FI100010B (fi) * 1995-11-28 1997-08-15 Ahlstrom Machinery Oy Seulasylinteri
DE19609316C2 (de) * 1996-03-09 2002-04-18 Voith Sulzer Stoffaufbereitung Verfahren zur Herstellung einer Siebvorrichtung mit kontrolliert ungleichmäßigen Sortierschlitzen sowie Siebvorrichtung und deren Verwendung
DE19747653C2 (de) * 1997-10-29 2002-04-25 Voith Paper Patent Gmbh Sieb für Faserstoffsuspensionen
US6109450A (en) * 1998-03-17 2000-08-29 G-Wald-Taylor, Inc. Apparatus for separating unwanted contaminants from fibrous slurry
DE19820675A1 (de) * 1998-05-08 1999-11-11 Fiedler Heinrich Gmbh Filterboden
US6095338A (en) * 1998-05-20 2000-08-01 Conn-Weld Industries, Inc. Separatory screen
US5968357A (en) * 1998-08-27 1999-10-19 Voith Sulzer Paper Technology North America, Inc. Screen basket having a removable and replaceable cylindrical mesh liner
US6595373B1 (en) 1998-10-06 2003-07-22 Kadant Black Clawson, Inc. Wedge wire and paper stock screening apparatus incorporating such wedge wire
FR2809029B1 (fr) * 2000-05-16 2002-06-21 Johnson Filtration Systems Procede de fabrication d'un panier mecanique de filtration
WO2002034356A1 (fr) * 2000-10-24 2002-05-02 Advanced Fiber Technologies (Aft) Trust Cylindre a tamis dont la configuration augmente son efficacite
US6957741B2 (en) * 2001-08-07 2005-10-25 Manfred Franz Axel Freissle Screening arrangement
US20030082722A1 (en) * 2001-08-08 2003-05-01 Bingliang Fang Method for amplifying expression from a cell specific promoter
US7168570B2 (en) * 2001-10-24 2007-01-30 Advanced Fiber Technologies Screen cylinder with performance boosting configuration
US7303078B2 (en) * 2003-05-30 2007-12-04 Weatherford/Lamb, Inc. Screen panel
AT413110B (de) * 2003-10-15 2005-11-15 Andritz Ag Maschf Sortierer
US7799173B2 (en) * 2007-01-18 2010-09-21 Andritz Inc. Screen plates having diagonal slots with curved inlets for a digester
EP2222916B1 (fr) * 2007-11-14 2015-06-24 Kadant Canada Corp. Panier épurateur
SE531717C2 (sv) * 2007-11-30 2009-07-21 Metso Fiber Karlstad Ab Kokarsil för en kontinuerlig cellulosamassakokare
US20090211965A1 (en) * 2008-02-21 2009-08-27 Weatherford/Lamb, Inc. Arrangement for splicing panels together to form a cylindrical screen
US8028691B2 (en) 2008-10-27 2011-10-04 Johnson Screens, Inc. Passive solar wire screens for buildings
US7942156B2 (en) * 2008-11-20 2011-05-17 Electrolux Home Products, Inc. Screening arrangement for a dishwashing appliance, and associated apparatus
US9023456B2 (en) 2011-03-18 2015-05-05 Bilfinger Water Technologies, Inc. Profiled wire screen for process flow and other applications
DE102012217579A1 (de) 2012-09-27 2014-03-27 Skz - Kfe Ggmbh Kunststoff-Forschung Und -Entwicklung Zuführvorrichtung zur Zuführung von Fasern bei der Herstellung von faserverstärkten Kunststoffen
JP2017538870A (ja) 2014-10-14 2017-12-28 アイカワ ファイバー テクノロジーズ トラスト スクリーンシリンダー
WO2017041132A1 (fr) * 2015-09-08 2017-03-16 Schenck Process Australia Pty Ltd Panneau de criblage
AU2018303343B2 (en) * 2017-07-20 2020-03-19 Aqseptence Group Pty Ltd A screen
DE102018005307B3 (de) * 2018-07-04 2019-06-06 Andritz Fiedler Gmbh Siebvorrichtung
CN111035983B (zh) * 2020-01-06 2024-07-05 湖南三友环保科技有限公司 一种用于生物硅藻土混合液中杂质去除的过滤装置

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Publication number Priority date Publication date Assignee Title
US703683A (en) * 1902-02-21 1902-07-01 Nathaniel L Vrooman Screen-plate for pulp-strainers.
FR631856A (fr) * 1926-12-21 1927-12-28 Tamis en barres ou fils métalliques profilés
GB291530A (en) * 1927-03-04 1928-06-05 Hermann Schubert Improvements in or relating to sieves
DE658759C (de) * 1935-04-18 1938-04-12 Hermann Schubert Profilstaebe fuer Setzguttraeger bei Setz-, insbesondere Luftsetzmaschinen
GB450534A (en) * 1935-07-26 1936-07-21 George William Mensforth Improvements in and relating to filtering apparatus
DE969759C (de) * 1955-05-03 1958-07-17 Brueckenbau Flender G M B H Profilstab fuer Siebboeden
DE2460167C3 (de) * 1974-12-19 1983-11-17 Krauss-Maffei AG, 8000 München Spaltsieb mit auswechselbaren Siebstäben
US4113626A (en) * 1975-09-19 1978-09-12 The Black Clawson Company Dewatering screen
US4396503A (en) * 1981-08-10 1983-08-02 Hein Lehmann Ag Method and device for coating elements and screen elements made thereby
DE3327422C2 (de) * 1983-07-29 1995-03-16 Voith Gmbh J M Sieb, insbesondere für die Sortierung von auf der Grundlage von Altpapier hergestellten Fasersuspensionen
FR2572950B1 (fr) * 1984-11-12 1987-01-23 Lamort E & M Perfectionnements aux tamis pour epurateurs et a leur mode de fabrication
DE3816152A1 (de) * 1987-11-14 1989-11-23 Voith Gmbh J M Siebkorb und verfahren zu dessen herstellung
DE3927748C2 (de) * 1989-08-23 1994-03-10 Voith Gmbh J M Verfahren zum Herstellen eines Siebkorbes sowie nach diesem Verfahren hergestellter Siebkorb
DE9108129U1 (de) * 1991-07-02 1991-09-05 Heinrich Fiedler GmbH & Co. KG, 8400 Regensburg Siebelement

Also Published As

Publication number Publication date
EP0523313A1 (fr) 1993-01-20
DE4121897A1 (de) 1993-01-07
CA2072771A1 (fr) 1993-01-03
CA2072771C (fr) 2005-05-10
US5255790A (en) 1993-10-26
DE59204473D1 (de) 1996-01-11
ATE130889T1 (de) 1995-12-15

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