EP0638687A1 - Dispositif d'épuration - Google Patents

Dispositif d'épuration Download PDF

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Publication number
EP0638687A1
EP0638687A1 EP94111272A EP94111272A EP0638687A1 EP 0638687 A1 EP0638687 A1 EP 0638687A1 EP 94111272 A EP94111272 A EP 94111272A EP 94111272 A EP94111272 A EP 94111272A EP 0638687 A1 EP0638687 A1 EP 0638687A1
Authority
EP
European Patent Office
Prior art keywords
housing
drum
sorter according
sieve
diameter
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Withdrawn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
EP94111272A
Other languages
German (de)
English (en)
Inventor
Walter Musselmann
Reimund Rienecker
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 EP0638687A1 publication Critical patent/EP0638687A1/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Withdrawn legal-status Critical Current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 sorter according to the preamble of claim 1.
  • a sorter is known from DE-C 25 48 578.
  • the drum carries the sorting elements which are guided in the sieve space formed between the drum and the sieve concentrically surrounding it are, the drum and the sorting elements are part of the rotor, the axis of rotation of which is substantially equal to the longitudinal axis of the screen basket, which is also equal to the axis of rotational symmetry of the screen basket.
  • This arrangement creates a recirculation of the suspension - preferably fiber suspension in the waste paper industry - between the screen space and the drum interior, that is to say practically around the walls of the drum. The purpose of this is to improve the separation of the contaminants.
  • the discharge space for the heavy impurities is arranged next to the region of the housing that receives the sieve and the drum and is designed to be relatively narrow, its outer diameter being substantially larger than the largest inner diameter of the cylindrical sieve.
  • the light impurities are drawn off from the central, axial region of the housing on an end wall thereof which is opposite the end wall of the housing adjacent to the inlet space of the housing.
  • the object of the invention is to provide an arrangement which should be suitable for separating fiber suspensions which are particularly heavily contaminated, especially for final stage sorting.
  • Final stage sorting here means the process stage where the collected reject parts of the individual sorting stages are to be cleaned again in order to recover useful fibers.
  • Such a machine could also clean suspensions that are heavily contaminated with dirt.
  • helical walls as a carrier for the sorting elements which are guided along the screen, which are provided attached at least to the front ends of the drum.
  • a rotor designed in this way prevents dirt from adhering to the sorting elements or their supports and leads to the recirculation of the particles retained on the sieve. It goes without saying that with this design the length of the drum is substantially at least equal to the axial length of the screen, which is preferably designed as a screen cylinder.
  • FIG. 1 shows an axial section through the sorter according to the invention
  • FIG. 2 shows a view of the housing.
  • the rotor In the cylindrical housing 1 of the sorter is located coaxial a cylindrical sieve 2, in the interior of which the rotor is provided.
  • the rotor consists essentially of the rotor drum 3, the helical surfaces or walls 5 carried by it and the sorting elements 6 attached to them, which are preferably designed in the form of hydrofoils.
  • the rotor is driven by the shaft 10, the shaft being connected to the drum 3 via an essentially radially extending support disk 13.
  • the support disk 13 has through openings 14 in order to enable the suspension to circulate from the screen area to the drum interior 21.
  • This interior 21 is conical and widens in a funnel shape towards the free end of the drum 3, where the inlet end of the sieve space located inside the sieve 2 is located.
  • end of the drum which is arranged opposite to its end provided with the support disk 13.
  • a swirl chamber 9 which has a larger outer diameter than the inner diameter - generally the largest inner diameter - of the screen 2.
  • the end wall 8 of the same which delimits the swirl chamber 9 at the end of the housing is also conical, with a decrease in diameter thereof - in Direction away from the interior 21 of the drum - by a maximum of 11 mm per 3 mm axial housing length and a minimum of 2 mm per 3 mm axial length of the housing or the inclination is approximately 15 ° -33.5 °.
  • this end wall can also be designed according to a basket arch or an e-function, in both cases this end wall merging into the cylindrical housing wall radially on the outside. It can also be provided that the outer drum wall is of the same shape as the inner wall 4, that is, it is also conical.
  • the first option is the feeding centrally through a tube 7 which projects into the drum interior 21, the tube end opposite a baffle plate 23 is provided, which is attached to the shaft 10, but can also be connected to the support plate 13.
  • the material is accelerated radially outward, in order to support or strengthen the vortex flow of the suspension also inside the drum 21.
  • a further intensification of the vortex flow in the interior of the drum is carried out by the ribs 29 which exist between the openings 14 of the support disk 13. Incidentally, the vortex flow is essentially created by the drum itself.
  • the accepted material is withdrawn via nozzle 12.
  • the light impurities collect in the center of the housing, i.e. the vortex flow, and are withdrawn from the collection space 19 provided for this purpose via connecting pieces 20.
  • Heavy contaminants which preferably accumulate radially on the outside, are drawn off via the line 18 provided with the lock 17.
  • Heavy impurities of small diameter are separated into the vortex chamber 9 and also migrate along the wall 8 or 8 'into the collecting chamber 19 and can also be drawn off via a nozzle 20.
  • the discharge nozzle 18 and 20 are preferably connected tangentially to the housing.
  • the central line 7 and the baffle plate 23 are omitted in the case of the material supply nozzle 11 shown in broken lines.
  • the discharge nozzle 20 for the light impurities can be arranged at the position of the line 7.
  • the following guideline values can be assumed for the perforation or perforation of the sieve drum 2: for slots, a slot width between 0.2 and 0.4 mm and, if the sorter is intended for hole sorting according to the material to be cleaned, holes with diameters between 1.4 and 2 mm.
  • the inclination of the drum cone can be between 10 and 30 ° to the axis of rotation.
  • the maximum speed at the rotor - ie the outermost regions of the screen elements 6 or the helical walls 5 - can preferably be between 15 and 20 m / s.

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)
EP94111272A 1993-08-06 1994-07-20 Dispositif d'épuration Withdrawn EP0638687A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4326411 1993-08-06
DE4326411 1993-08-06

Publications (1)

Publication Number Publication Date
EP0638687A1 true EP0638687A1 (fr) 1995-02-15

Family

ID=6494588

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94111272A Withdrawn EP0638687A1 (fr) 1993-08-06 1994-07-20 Dispositif d'épuration

Country Status (5)

Country Link
US (1) US5492225A (fr)
EP (1) EP0638687A1 (fr)
JP (1) JPH07173786A (fr)
CA (1) CA2129593A1 (fr)
FI (1) FI943656A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2723543B1 (fr) * 1994-08-10 1996-10-11 Lamort E & M Perfectionnements aux tamis cylindriques munis d'un rotor.
SE507905C2 (sv) * 1995-10-11 1998-07-27 Sunds Defibrator Ind Ab Anordning för silning av massasuspensioner

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3247965A (en) * 1963-05-07 1966-04-26 Kimberly Clark Co Vertical centrifugal screen for pulp stock
EP0094022A2 (fr) * 1982-05-12 1983-11-16 J.M. Voith GmbH Rotor pour appareil de classification pour l'épuration de suspensions de fibres, notamment ceux de l'industrie papetière
DE4021350A1 (de) * 1990-02-21 1991-08-22 Satomi Seisakusho Co Papierstoff-siebvorrichtung
US5061370A (en) * 1990-03-20 1991-10-29 Quebec And Ontario Paper Company Ltd. Screening device for slurries with improved rotor and hub design
EP0487224A1 (fr) * 1990-11-19 1992-05-27 The Black Clawson Company Dispositif de tamisage pour la pâte de papier
DE4337243A1 (de) * 1993-10-30 1994-03-17 Voith Gmbh J M Sortierer, insbesondere Endstufensortierer

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE328464B (fr) * 1964-10-19 1970-09-14 Grubbens & Co Ab
DE2338909A1 (de) * 1973-08-01 1975-04-17 Zimmermann Azo Maschf Siebmaschine
DE2548578C3 (de) * 1975-10-30 1979-08-23 J.M. Voith Gmbh, 7920 Heidenheim Vorrichtung zur Abscheidung von Verunreinigungen in Faserstoffsuspensionen
DE2850385C2 (de) * 1978-11-21 1981-02-05 J.M. Voith Gmbh, 7920 Heidenheim Vorrichtung zum Ausscheiden von Verunreinigungen aus Faserstoffsuspensionen
SE461104B (sv) * 1988-05-05 1990-01-08 Kamyr Ab Apparat foer uppdelning av en suspension av en fiberhaltig cellulosamassa
SU1687303A1 (ru) * 1989-02-15 1991-10-30 Ленинградский институт инженеров железнодорожного транспорта им.акад.В.Н.Образцова Конический гидрогрохот

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3247965A (en) * 1963-05-07 1966-04-26 Kimberly Clark Co Vertical centrifugal screen for pulp stock
EP0094022A2 (fr) * 1982-05-12 1983-11-16 J.M. Voith GmbH Rotor pour appareil de classification pour l'épuration de suspensions de fibres, notamment ceux de l'industrie papetière
DE4021350A1 (de) * 1990-02-21 1991-08-22 Satomi Seisakusho Co Papierstoff-siebvorrichtung
US5061370A (en) * 1990-03-20 1991-10-29 Quebec And Ontario Paper Company Ltd. Screening device for slurries with improved rotor and hub design
EP0487224A1 (fr) * 1990-11-19 1992-05-27 The Black Clawson Company Dispositif de tamisage pour la pâte de papier
DE4337243A1 (de) * 1993-10-30 1994-03-17 Voith Gmbh J M Sortierer, insbesondere Endstufensortierer

Also Published As

Publication number Publication date
FI943656A0 (fi) 1994-08-05
US5492225A (en) 1996-02-20
FI943656A (fi) 1995-02-07
JPH07173786A (ja) 1995-07-11
CA2129593A1 (fr) 1995-02-07

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