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EP0663469A1 - Rotor, en particulier pour un tamis de classification - Google Patents

Rotor, en particulier pour un tamis de classification Download PDF

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Publication number
EP0663469A1
EP0663469A1 EP94120522A EP94120522A EP0663469A1 EP 0663469 A1 EP0663469 A1 EP 0663469A1 EP 94120522 A EP94120522 A EP 94120522A EP 94120522 A EP94120522 A EP 94120522A EP 0663469 A1 EP0663469 A1 EP 0663469A1
Authority
EP
European Patent Office
Prior art keywords
rotor
elements
rotor according
blade elements
sorter
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Withdrawn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
EP94120522A
Other languages
German (de)
English (en)
Inventor
Gerhard Veh
Jürgen Oerter
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 Paper Fiber and Environmental Solutions GmbH and Co KG
Original Assignee
Voith Sulzer Stoffaufbereitung 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 Sulzer Stoffaufbereitung GmbH filed Critical Voith Sulzer Stoffaufbereitung GmbH
Publication of EP0663469A1 publication Critical patent/EP0663469A1/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Withdrawn legal-status Critical Current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
    • D21D5/023—Stationary screen-drums
    • D21D5/026—Stationary screen-drums with rotating cleaning foils

Definitions

  • the invention relates to a rotor according to the preamble of patent claim 1.
  • a rotor is known from EP 0 404 624.
  • guide walls are provided which probably extend essentially radially.
  • the aim is to communicate a speed in the tangential or circumferential direction of the suspension to be sorted by the rotation of the guide walls connected to the rotor, which speed differs from the circumferential speed of the pulse elements. According to the statements in this document, this is achieved in that the radially outer edges of the guide vanes are located on a smaller radius than the impulse elements.
  • SDGs also mean different sorting qualities.
  • the separation efficiency of the machine falls with increasing mean SDG.
  • Optimal sorting efficiency can only be achieved by even speeds on the screen.
  • Deposits can form at points of low flow velocities or dead zones in the accept area of a screen basket sorter. This is particularly critical when the machine is in front of the PM and the deposits build up on it as holes and tears.
  • FIG. 1 shows an axial section through a first rotor design
  • FIG. 2 shows a plan view these and FIG. 3 represent a further embodiment of the rotor in axial section.
  • the rotor 1 has impulse elements 2 guided closely along the screen 22, which can have an airfoil profile in cross section, as can be seen from FIG. 2. These wings are held on the rotor with brackets 15 and 8. These pulse elements generate pulses for sorting the suspension, preferably small fibers made of paper or cellulose, and for keeping the screen 22 free of residues or fiber accumulations or specks, as these are sometimes also called.
  • the rotor is rotatably held on a shaft 4 by means of a holding piece 6.
  • blade elements 3 radially inside the pulse elements 2. These are designed here in a shape that corresponds to the backward curved blades of a radial water pump.
  • the rotor is similar in terms of blades and pulse elements, but has one flatter hub 9 'with a favorable rounded flow guide surface 16.
  • the delivery head of the pump 5 it is favorable to set the delivery head of the pump 5 at approximately 0.1 to 15 m.
  • the pump wheel saves a certain delivery head before the suspension enters the sorter, if this is a pressure sorter (which is operated as a so-called pressure sorter). Otherwise, the dimensioning of a pump, in particular here the pump blades (blade elements 3), can be found in the specialist literature.

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)
EP94120522A 1994-01-18 1994-12-23 Rotor, en particulier pour un tamis de classification Withdrawn EP0663469A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4401305 1994-01-18
DE4401305 1994-01-18

Publications (1)

Publication Number Publication Date
EP0663469A1 true EP0663469A1 (fr) 1995-07-19

Family

ID=6508152

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94120522A Withdrawn EP0663469A1 (fr) 1994-01-18 1994-12-23 Rotor, en particulier pour un tamis de classification

Country Status (6)

Country Link
US (1) US5611434A (fr)
EP (1) EP0663469A1 (fr)
JP (1) JPH07308598A (fr)
BR (1) BR9500144A (fr)
CA (1) CA2140490A1 (fr)
FI (1) FI950195L (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0931875A1 (fr) * 1998-01-22 1999-07-28 COMER S.p.A. Dispositif de tamissage pour suspensions fibreuses
WO2011060892A1 (fr) * 2009-11-17 2011-05-26 Werner Lange Dispositif de criblage pour le nettoyage d'une suspension de matière fibreuse

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI102980B (fi) * 1997-05-21 1999-03-31 Valmet Corp Siipisovitelma kuitumassan lajittelulaitetta varten
US5954956A (en) * 1997-07-22 1999-09-21 J&L Fiber Services Modular screen cylinder and a method for its manufacture
US6138838A (en) * 1998-05-29 2000-10-31 J&L Fiber Services, Inc. Screen media and a screening passage therefore
ES2155411B1 (es) * 1999-08-24 2001-11-01 Perez Ernesto Pastor Rotor para depurador de pasta de papel.
FR2852860B1 (fr) * 2003-03-26 2006-06-02 Piscines Desjoyaux Sa Dispositif de filtration de l'eau d'un bassin de piscine au moyen d'au moins une poche filtrante
ITVI20040208A1 (it) * 2004-09-02 2004-12-02 Comer Spa Rotore perfezionato per epuratori di sospensioni fibrose
CA3237289A1 (fr) 2022-04-21 2023-09-21 Iii John Joseph Egan Rotor dote d'entretoises a balayage vers l'avant pour cylindres d'ecran sous pression

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1331587A (en) * 1919-02-18 1920-02-24 Northern New York Foundry & Ma Centrifugal pulp-screen
US1856176A (en) * 1928-09-06 1932-05-03 Edward J Trimbey Method of and apparatus for screening paper pulp
EP0404624A2 (fr) * 1989-06-05 1990-12-27 Valmet Paper Machinery Inc. Procédé pour contrôler un dispositif d'épuration sous pression et dispositif d'épuration sous pression

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US727878A (en) * 1902-10-23 1903-05-12 Baker And Shevlin Company Centrifugal pulp-screen.
US799434A (en) * 1904-11-05 1905-09-12 Baker And Shevlin Company Stock-distributer for centrifugal pulp-screens.
US1134304A (en) * 1912-05-17 1915-04-06 Peder P Westbye Pulp-screen.
US1774644A (en) * 1927-05-07 1930-09-02 Gesnel Charles Alfred Sifting machine
US1973864A (en) * 1931-09-05 1934-09-18 Biffar Andreas Centrifugal sieving machine
US3953325A (en) * 1972-09-27 1976-04-27 Nelson Douglas G Pulp screen with rotating cleaning foil
US3970548A (en) * 1973-08-27 1976-07-20 The Black Clawson Company Apparatus for screening paper fiber stock
DE3217824C2 (de) * 1982-05-12 1985-10-24 J.M. Voith Gmbh, 7920 Heidenheim Rotor für Sortierer zur Reinigung von Fasersuspensionen, insbesondere aus Altpapier
DE3322578C2 (de) * 1983-06-14 1986-01-16 Sulzer-Escher Wyss GmbH, 7980 Ravensburg Sortiervorrichtung
SE443007B (sv) * 1985-03-04 1986-02-10 Kamyr Ab Silanordning
FI80736B (fi) * 1989-02-16 1990-03-30 Tampella Oy Ab Foerfarande foer sortering av massasuspension och sorteringsapparat.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1331587A (en) * 1919-02-18 1920-02-24 Northern New York Foundry & Ma Centrifugal pulp-screen
US1856176A (en) * 1928-09-06 1932-05-03 Edward J Trimbey Method of and apparatus for screening paper pulp
EP0404624A2 (fr) * 1989-06-05 1990-12-27 Valmet Paper Machinery Inc. Procédé pour contrôler un dispositif d'épuration sous pression et dispositif d'épuration sous pression

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0931875A1 (fr) * 1998-01-22 1999-07-28 COMER S.p.A. Dispositif de tamissage pour suspensions fibreuses
WO2011060892A1 (fr) * 2009-11-17 2011-05-26 Werner Lange Dispositif de criblage pour le nettoyage d'une suspension de matière fibreuse

Also Published As

Publication number Publication date
FI950195A7 (fi) 1995-07-19
US5611434A (en) 1997-03-18
CA2140490A1 (fr) 1995-07-19
BR9500144A (pt) 2006-01-03
JPH07308598A (ja) 1995-11-28
FI950195L (fi) 1995-07-19
FI950195A0 (fi) 1995-01-17

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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