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EP0236843A2 - Tamis de triage - Google Patents

Tamis de triage Download PDF

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Publication number
EP0236843A2
EP0236843A2 EP87102624A EP87102624A EP0236843A2 EP 0236843 A2 EP0236843 A2 EP 0236843A2 EP 87102624 A EP87102624 A EP 87102624A EP 87102624 A EP87102624 A EP 87102624A EP 0236843 A2 EP0236843 A2 EP 0236843A2
Authority
EP
European Patent Office
Prior art keywords
sorting
sieve
depressions
slots
holes
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.)
Withdrawn
Application number
EP87102624A
Other languages
German (de)
English (en)
Other versions
EP0236843A3 (fr
Inventor
Josef Trä
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.)
JM Voith GmbH
Original Assignee
JM Voith 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 JM Voith GmbH filed Critical JM Voith GmbH
Publication of EP0236843A2 publication Critical patent/EP0236843A2/fr
Publication of EP0236843A3 publication Critical patent/EP0236843A3/fr
Withdrawn legal-status Critical Current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 sorting screen according to the preamble of claim 1.
  • Sorting screens are used both as flat screens and as rotationally symmetrical screen baskets in many embodiments, in particular in the paper industry, for the different sorting tasks, e.g. ultimately to obtain the fibers or a pure fiber suspension from waste paper. Sorting tasks have become quite demanding lately, so that e.g. the slot widths are already below 0.3 mm. There is either a high risk of clogging of the screens or there is a low sorting performance.
  • the object of the invention is to provide a sorting screen which has a good sorting performance, ie a good sorting efficiency with good throughput without the risk of clogging, and in which the highest possible percentage of good fibers can pass through the screen.
  • the risk of blockage of the sieve is reduced to a particularly great extent even at higher suspension consistencies, because there is greater freedom in the recesses for in particular the larger components, such as dirt and specks.
  • the effectiveness is not impaired if the edges of the depressions are worn.
  • EP 00 79 811 explains a similar arrangement to the known arrangement described above, but it is a single row of holes per groove, the holes of a groove wall being to be arranged directly adjacent or abutting the fibers in a direct way by reflection to facilitate passage through the holes on the groove wall.
  • the sorting wings 2 held by support arms 6 run at a short distance from the surface of the strainer basket in the direction of the arrow.
  • the sorting wings 2 have an airfoil profile and generate pressure pulsations in the vicinity of the screen basket surface, which propagate into the depressions 5 and into the screen openings 4.
  • the recesses 5 give the screen basket 1 practically an interrupted, no longer smooth surface.
  • the depressions 5 create a vortex field in the flow, which prevents the sieve openings from becoming clogged. It is also achieved that relatively long fibers can also squeeze through the sieve slots 4. Heavy or larger particles of dirt that get into these wide depressions can thus be more easily excreted and do not cause constipation.
  • the sieve slots 4 preferably run parallel to the axis of rotation and the generatrix of the generatrix of the sieve basket 1.
  • the depressions in the axial direction of the rotor blades 2 are interrupted by cross webs l3 in order to give the screen basket greater strength.
  • Two to four parallel sieve slots or corresponding rows 9 of sieve holes are preferably provided for each recess 5.
  • the width of the sieve slots can be less than 0.45 mm, in particular less than 0.30 mm. In order to best utilize the effect of the turbulence generated by the depressions, only two (at most three) slots per depression are the cheapest.
  • the angle a which the front side surface 11 forms with respect to the direction of rotation of the sorting wing 2 or the suspension flow on the sieve surface (see thick arrows) with the vertical on the lateral surface or flow direction (thick arrow) is between 15 ° and 60 ° , preferably 35 ° and 50 °.
  • the rear surface l2 hardly deviates from this vertical line, since this makes the slot pitch t the smallest and the free screen passage area the largest.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
EP87102624A 1986-03-07 1987-02-24 Tamis de triage Withdrawn EP0236843A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3607457 1986-03-07
DE19863607457 DE3607457A1 (de) 1986-03-07 1986-03-07 Sortiersieb

Publications (2)

Publication Number Publication Date
EP0236843A2 true EP0236843A2 (fr) 1987-09-16
EP0236843A3 EP0236843A3 (fr) 1987-11-04

Family

ID=6295706

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87102624A Withdrawn EP0236843A3 (fr) 1986-03-07 1987-02-24 Tamis de triage

Country Status (4)

Country Link
US (1) US4812229A (fr)
EP (1) EP0236843A3 (fr)
JP (1) JPH0791795B2 (fr)
DE (1) DE3607457A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989006719A1 (fr) * 1988-01-15 1989-07-27 Aktiebolaget Knutsilplåtar Plaque de tamis
WO1990001983A1 (fr) * 1988-08-26 1990-03-08 Panel International Ltd. Plaque de tamisage
WO1990004675A1 (fr) * 1988-10-19 1990-05-03 A. Ahlstrom Corporation Tamis et procede de fabrication correspondant
EP0414119A1 (fr) * 1989-08-17 1991-02-27 HEINRICH FIEDLER GMBH & CO KG Cylindre pour épurateur
EP0471195A1 (fr) * 1990-08-16 1992-02-19 CAE Investments B.V. Toiles et techniques de fabrications
WO1996039558A1 (fr) * 1995-06-06 1996-12-12 Cae Screenplates Oy Tamis a surfaces profilees multiples
WO1997020103A1 (fr) * 1995-11-28 1997-06-05 Ahlstrom Machinery Oy Cylindre de criblage

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI77279C (fi) * 1987-04-30 1989-02-10 Ahlstroem Oy Foerfarande och anordning foer behandling av fibersuspension.
US4919797A (en) * 1989-02-09 1990-04-24 The Black Clawson Company Screening apparatus for paper making stock
WO1991005911A1 (fr) * 1989-10-23 1991-05-02 Beloit Corporation Profile de panier pour tamis
JP2515808Y2 (ja) * 1990-10-01 1996-10-30 相川鉄工株式会社 製紙用ストレーナ
WO1996026794A1 (fr) 1995-02-28 1996-09-06 Neil Deryck Bray Graham Dispositif de criblage et appareil comprenant ce dispositif
DE29515338U1 (de) * 1995-09-25 1995-11-23 Heinrich Fiedler GmbH & Co. KG, 93057 Regensburg Flügel für Sortiervorrichtungen
US5791495A (en) * 1996-03-11 1998-08-11 Beloit Technologies, Inc. Paper pulp screen cylinder
DE29805984U1 (de) * 1998-04-01 1998-07-02 A.S. Apparatebau GmbH, 83607 Holzkirchen Siebboden
WO2000064600A1 (fr) * 1999-04-28 2000-11-02 Thermo Black Clawson Inc. Transmission de couple amelioree dans des cylindres tamiseurs a fentes
JP2002285488A (ja) * 2001-03-28 2002-10-03 Ishikawajima Sangyo Kikai Kk スクリーンシリンダ
JP6410044B2 (ja) * 2015-02-16 2018-10-24 王子ホールディングス株式会社 抄紙原料スクリーン装置用バスケット及びスクリーンシステム

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2419155A (en) * 1944-02-19 1947-04-15 Union Screen Plate Company Wood pulp screen plate
US3409132A (en) * 1966-01-03 1968-11-05 Buckeye Cellulose Corp Screen plate for centrifugal pulp screens
GB1242086A (en) * 1967-08-02 1971-08-11 Lamort E & M Refining apparatus, chiefly for screening paper pulp
EP0079811A1 (fr) * 1981-11-18 1983-05-25 E. + M. Lamort Société Anonyme dite: Perfectionnements aux épurateurs de pâte à papier et à leurs tamis
EP0093187A1 (fr) * 1982-05-04 1983-11-09 Hermann Finckh Maschinenfabrik GmbH & Co. Tambour de tamisage pour les appareils d'épuration des pâtes à papier
EP0146641A1 (fr) * 1983-10-11 1985-07-03 Hermann Finckh Maschinenfabrik GmbH & Co. Tamis à trier pour suspensions de fibres de pâte

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE502731C (de) * 1930-07-17 Linkoepings Armatur Och Metall In der Papierfabrikation verwendete geschlitzte Knotenfaengerplatte
DE143894C (fr) *
US226819A (en) * 1880-04-20 Leopold zeyext
US1631585A (en) * 1927-06-07 Screen plate
US2301514A (en) * 1939-10-05 1942-11-10 Grover C Brewster Screen plate
US2827169A (en) * 1954-12-07 1958-03-18 Internat Pulp Products Inc Screen plate
US4017387A (en) * 1975-08-11 1977-04-12 The Black Clawson Company Screening apparatus
US4276159A (en) * 1980-06-19 1981-06-30 The Black Clawson Company Apparatus for screening paper fiber stock
FI67588C (fi) * 1983-01-26 1985-04-10 Ahlstroem Oy Silplaot
AT378385B (de) * 1983-11-04 1985-07-25 Plasser Bahnbaumasch Franz Gleisbaumaschine mit siebanlage
US4717471A (en) * 1985-09-05 1988-01-05 The Black Clawson Company Apparatus for screening paper fiber stock

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2419155A (en) * 1944-02-19 1947-04-15 Union Screen Plate Company Wood pulp screen plate
US3409132A (en) * 1966-01-03 1968-11-05 Buckeye Cellulose Corp Screen plate for centrifugal pulp screens
GB1242086A (en) * 1967-08-02 1971-08-11 Lamort E & M Refining apparatus, chiefly for screening paper pulp
EP0079811A1 (fr) * 1981-11-18 1983-05-25 E. + M. Lamort Société Anonyme dite: Perfectionnements aux épurateurs de pâte à papier et à leurs tamis
EP0093187A1 (fr) * 1982-05-04 1983-11-09 Hermann Finckh Maschinenfabrik GmbH & Co. Tambour de tamisage pour les appareils d'épuration des pâtes à papier
EP0146641A1 (fr) * 1983-10-11 1985-07-03 Hermann Finckh Maschinenfabrik GmbH & Co. Tamis à trier pour suspensions de fibres de pâte

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989006719A1 (fr) * 1988-01-15 1989-07-27 Aktiebolaget Knutsilplåtar Plaque de tamis
WO1990001983A1 (fr) * 1988-08-26 1990-03-08 Panel International Ltd. Plaque de tamisage
WO1990004675A1 (fr) * 1988-10-19 1990-05-03 A. Ahlstrom Corporation Tamis et procede de fabrication correspondant
EP0414119A1 (fr) * 1989-08-17 1991-02-27 HEINRICH FIEDLER GMBH & CO KG Cylindre pour épurateur
EP0471195A1 (fr) * 1990-08-16 1992-02-19 CAE Investments B.V. Toiles et techniques de fabrications
USRE39940E1 (en) 1990-08-16 2007-12-18 Advanced Fiber Technologies (Aft) Trust Screen plates and methods of manufacture
WO1996039558A1 (fr) * 1995-06-06 1996-12-12 Cae Screenplates Oy Tamis a surfaces profilees multiples
CN1077634C (zh) * 1995-06-06 2002-01-09 Cae筛板公司 一种过筛圆筒或板及过筛浆液的方法
WO1997020103A1 (fr) * 1995-11-28 1997-06-05 Ahlstrom Machinery Oy Cylindre de criblage

Also Published As

Publication number Publication date
EP0236843A3 (fr) 1987-11-04
JPS62289693A (ja) 1987-12-16
DE3607457C2 (fr) 1988-08-04
JPH0791795B2 (ja) 1995-10-04
DE3607457A1 (de) 1987-09-10
US4812229A (en) 1989-03-14

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Inventor name: TRAE, JOSEF