EP0501134A1 - Epurateur de suspensions pâteuses - Google Patents

Epurateur de suspensions pâteuses Download PDF

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Publication number
EP0501134A1
EP0501134A1 EP92100954A EP92100954A EP0501134A1 EP 0501134 A1 EP0501134 A1 EP 0501134A1 EP 92100954 A EP92100954 A EP 92100954A EP 92100954 A EP92100954 A EP 92100954A EP 0501134 A1 EP0501134 A1 EP 0501134A1
Authority
EP
European Patent Office
Prior art keywords
cleaner according
inner cylinder
outer cylinder
parts
heavy parts
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.)
Granted
Application number
EP92100954A
Other languages
German (de)
English (en)
Other versions
EP0501134B1 (fr
Inventor
Alfred Dr. Christ
Erich Dr. Linck
Herbert Holik
Wolfgang Dr. Siewert
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
Sulzer Escher Wyss GmbH
Escher Wyss GmbH
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 Sulzer Escher Wyss GmbH, Escher Wyss GmbH, Voith Sulzer Stoffaufbereitung GmbH filed Critical Sulzer Escher Wyss GmbH
Publication of EP0501134A1 publication Critical patent/EP0501134A1/fr
Application granted granted Critical
Publication of EP0501134B1 publication Critical patent/EP0501134B1/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
    • D21D5/18—Purification of the pulp suspension by mechanical means; Apparatus therefor with the aid of centrifugal force
    • D21D5/22—Purification of the pulp suspension by mechanical means; Apparatus therefor with the aid of centrifugal force in apparatus with a vertical axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles

Definitions

  • the invention relates to a cleaner for suspensions of the type specified in the preamble of claim 1.
  • the aim of the present invention is to provide a cleaner which is able to effectively separate light parts as well as heavy parts which tend to cake together to form crusts.
  • the previous upstream devices for heavy part separation should be able to be saved. Furthermore, it should take up as little parking space as possible.
  • the principle of centrifugal force is used in a known manner, the heavy parts accumulating on the wall of the outer cylinder in the rotation field, while the light parts strive inwards towards the wall of the inner cylinder.
  • the suspension to be treated is fed axially to the cleaner in a known manner and is conveyed by pump-like blading to the radius of the separation chamber, in accordance with the invention in such a way that at the end of each pump blade flow channel there is a sudden expansion of the flow channels, advantageously in two increments in such a way that this step diffuser opens meridional in the separation chamber.
  • the stepwise widening of the flow channels induce a high isotopic turbulence in the flow, which is able to tear apart the fibers that may have agglomerated around the parts to be separated and in this way expose the parts.
  • additional turbulence exciters are provided on the inner cylinder, e.g. in the form of nose-like displacement bodies protruding into the flow in the separation chamber.
  • the separating chamber is designed in the form of a ring, with radius ratios between the inner and outer cylinders in the range from 0.5 to 0.85, in particular approximately 0.70, being particularly advantageous.
  • the light parts which accumulate on the inner cylinder of the separation chamber, are discharged via chute-shaped openings in the inner cylinder at its outlet end. These recesses open in between the inner cylinder final conical sheaths provided and continue into a fixed central tube. The two cone shells delimiting these channels end in a seal. Through the central tube, the light parts with a certain proportion of liquid in the suspension are discharged separately from the main stream of the suspension.
  • the suspension portion accompanying the light parts is advantageously dimensioned with 0.5 to 3% of the suspension flow passing through the apparatus.
  • the design with the annular separation chamber and the separate guidance of the inner cylinder make it possible that with the help of a strongly reducing reducer with coaxial input and output shaft, the drive shaft of which is kept at zero speed, the speed of the separate part of the inner cylinder is somewhat larger or smaller than keeping the speed of the outer cylinder.
  • the gearbox is fastened in the conical end part of the outer cylinder or in the conical jacket that closes the inner cylinder.
  • the transmission is advantageously selected so that the speed difference is in the range between 0.1 and 2%, in particular 0.5%.
  • To hold the gearbox drive shaft at zero speed it is held stationary on the central tube for removing the light parts.
  • this shaft can be driven by a motor.
  • the separate and specifically rotatable part of the inner cylinder advantageously carries at least one scraper which can be inserted into a groove in the outer wall of the inner cylinder which is parallel to it. Then, during operation, the scraper continuously scrapes the outer cylinder to keep solid build-up free by whirling up these particles, the heavy parts, each time the scraper passes and then conveying them onward by the drag forces.
  • several such scrapers are arranged on the inner cylinder in a uniform circumferential division.
  • a slide ring runs in the respective collecting groove, also dragged by the specially rotatable inner cylinder with um.
  • This carries ribs that push the heavy parts in the circumferential direction up to one or advantageously several openings provided in a uniform circumferential division, so-called spit openings, which lead through the wall of the outer cylinder.
  • These openings are briefly opened, ie opened, by a slide opening in the slide ring as it rotates.
  • a fixed collecting trough is attached to the rotatable outer cylinder, which collects and discharges the heavy parts.
  • deflection pieces are attached to the spit openings on the outer wall of the outer cylinder, which deflect the emerging heavy part jets backwards relative to the direction of rotation of the outer cylinder. The jet thus hits the wall of the collecting trough with a tangential speed component and with the lowest possible relative speed, which is favorable for reducing wear, leads to less splash water formation and additionally results in a certain drive.
  • these walls in particular the inner contour of the outer cylinder, the circumferential collecting grooves, the spewing openings with the deflection pieces and the collecting channels can be provided with wear-resistant coatings.
  • the type of installation of the cleaner is in itself arbitrary, since the rotational centrifugal acceleration is a multiple of the gravitational acceleration. In order to meet the above-mentioned requirement for smaller space requirements, a vertical installation of the apparatus is preferred.
  • the inlet of the suspension can be at the bottom or at the top, with the inlet at the bottom again being preferred. Since the cleaner is a rapidly rotating, comparatively heavy system, careful storage with regard to critical speeds must be ensured.
  • the two bearing housings that support the outer cylinder are each attached to a plate that are in turn connected to each other by rigid connecting parts.
  • These plates and supports form an inner frame which is supported by means of elastic, damping elements in relation to cross members of an outer frame which can be produced with rather coarse tolerances.
  • the location, number and hardness of these elastic, damping elements can be freely selected as required for laying the most important critical speeds in harmless speed ranges.
  • the entire cleaner is built so that after loosening fewer flange connections and removing a light removal piece, the entire separating chamber can be lowered and pivoted out by means of a device attached to the inner frame, so that the annular separating chamber is accessible axially from above and the scraper, which may be worn, is easily removed pulled out of their grooves and new ones can be inserted into them.
  • the suspension to be cleaned a waste paper fiber suspension
  • An elastic element for example a rubber compensator 2
  • An arc 3 follows with a cone 4, through which the suspension is guided into the axial inflow line 5.
  • a seal 6 is provided here between the fixed part and the following rotatable part, formed either as a packing or as a mechanical seal, and a bearing 59, which can absorb both axial and radial forces.
  • the suspension flows through a cone piece 8, which carries a ring gear 9 on a flange, via which the entire cleaner is driven by the motor 11 by means of a toothed belt 10.
  • the cone piece 8 also serves as an easily removable removal piece that can be removed first during maintenance work, as will be explained later. It is provided with closable hand openings 12, which make it possible to inspect the critical, dirt-prone inlet part and, if necessary, to clean it.
  • a pump-like inlet blading 13 which is shaped in such a way that it catches the incoming flow as smoothly as possible, directs it to a larger radius and releases it in the meridional direction.
  • This blading 13 is provided so that nowhere smaller flow gaps than e.g. 12 mm arise, so that even coarse solid parts do not lead to blockage of the apparatus.
  • the flow channels widen in the manner of a step diffuser.
  • a first expanded chamber of the step diffuser is indicated in the drawing and designated 14. From this the second step diffuser jump takes place to the dimension of the annular separating chamber 15.
  • the purpose of this step-like widening of the flow channels is to cause a high turbulence of the suspension entering the separating chamber 15, which is able to tear apart individual fiber aggregations and to expose any wrapped, packed light and heavy parts as well as the fibers.
  • an equal number of the individual diffuser chambers 14 is provided as that of the blades 13 of the inlet blading.
  • the separation chamber 15 is formed and delimited by walls of the concentrically and coaxially arranged outer cylinders 16 and inner cylinders 17.
  • the wall of the inner cylinder 17 is provided with nose-like projections 18.
  • turbulence-inducing elements which protrude into the area of the separation chamber 15 for selection.
  • the heavy parts fall at the end of the deposition chamber 15 into an annular collecting groove 20 that runs in the circumferential direction on the circumference of the outer cylinder 16, so that the heavy parts that strike somewhere on the inner wall of the outer cylinder 16 are reliably conveyed to the collecting groove 20
  • Elastic scrapers 32 are provided, which are inserted and held on the inner cylinder 17 in a groove 33 running parallel to the axis of the inner cylinder.
  • the inner cylinder 17 rotates slowly during operation relative to the outer cylinder 16, ie when the number of revolutions of the outer cylinder 16 is 1500, for example, the inner cylinder 17 rotates in the same sense, for example at 1490 rpm.
  • the inner cylinder 17 is driven by means of an epicyclic reduction gear 34 with an aligned drive shaft 35 and output shaft 36.
  • the housing of this gear 34 is fixedly connected to the conical jacket 22, and the drive shaft 35 is kept at zero speed by means of the shaft 29 coupled to it . rotated with the auxiliary motor 31.
  • the conical jackets 22 and 23 connected to the ribs 24 are fixedly connected via the blades 37 of the turbine-like outlet blading to the conical end part 38 of the cleaner, which forms the end of the outer cylinder 16 rotatable with the drive motor 11.
  • the part of the inner cylinder 17 which essentially delimits the separation chamber 15 is force-separated from this system, which is closed in terms of force and form, so that it can be rotated specifically and separately relative to the outer cylinder 16 by the means mentioned above:
  • a driver clutch 39 on the output shaft 36 drives the separated part of the inner cylinder 17 at a somewhat reduced speed compared to the above-mentioned system connected to the outer cylinder 16.
  • the part of the inner cylinder 17 can carry out the relative rotary movement, it is separated from the inner cone jacket 22 and is supported at both ends, above and below, in bearings 40 and 41. Seals 42 and 43 prevent the penetration of suspension from the separation chamber 15 into the hollow interior of the inner cylinder 17th
  • the scrapers 32 graze along the inner wall of the outer cylinder 16 and thus prevent caking of heavy parts here, the heavy parts being carried further by the drag forces from the flow until they reach the collecting groove 20 fall.
  • the heavy parts that have fallen into the collecting groove 20 are dragged there in the circumferential direction by ribs provided in a slide ring 44, which is also moved by the rotatable part of the inner cylinder 17 via arms and / or trailing bolts 46 inserted in the groove 33, until they reach the region of the openings leading out of the collecting groove 20, spit openings 47.
  • a jet limited to the circulation of the slide ring 44 is limited to the heavy parts discharges through the spit opening 47 and impacts on a wall of a fixed collecting channel 49, which is assembled from two parts and which wraps around the outer cylinder 16.
  • This has a drain pipe 50 at at least one point. Seals 51 between the collecting channel and the outer wall of the outer cylinder prevent splashing water unwanted spots.
  • the jet emerging from the spit opening 47 is directed such that it points backwards relative to the direction of rotation of the outer cylinder 16.
  • a suitable, arch-like steering piece is placed on the spit opening 47 on the outer wall of the outer cylinder 16. (Not shown in the drawing).
  • a plurality of spit openings 47 distributed in a symmetrical arrangement on the circumference of the outer cylinder 16 are provided, which are each opened at the same time by the slide ring 44.
  • a same heavy parts discharge device 20, not shown in detail in the drawing, can be provided at the inlet end of the separation chamber 15 and / or in the middle thereof. This is in the case that heavy parts that are heavier than average occur and do not have to be transported as far up.
  • the lower bearing 7 and the upper bearing 54 are installed in bearing housings 59 and 60, which in turn are fastened to a plate 61 and 62, respectively, which are connected by means of several deformation-free connecting elements, e.g. Pipes 63 are firmly connected. These two plates 61 and 62 together with the connecting elements 63 form an inner frame.
  • the drive motor 11 is also fastened on one plate, the lower 61.
  • the inner frame 61, 62, 63 is supported by an appropriate number of rubber-elastic, harder or softer, damping elements 64 on an outer frame, which is assembled from appropriately arranged supports 65.
  • the advantage of this arrangement of the cleaner in the two frames, the inner and the outer, is that a critical speed of the cleaner rotating during operation can be varied within wide limits. With an appropriate choice of location, number and hardness of the rubber-elastic elements 64, the critical speed can thus be shifted into a harmless speed range.
  • Protective insurance (not shown) can be attached to the inner frame, possibly also to the outer frame, which prevents the rotating cleaner from touching.
  • the flange connections of the expansion piece 8 are first loosened after the collecting channels 49 have been removed, then the outer cylinder 16 is packed by a device 66 (not shown in detail), a few millimeters raised so that the expansion piece 8 can be lifted out of its offsets and removed laterally.
  • the entire separating chamber 15 with the inlet blading 13 can be lowered with the device 66 until the gear coupling 39 to the separately separately rotatable part of the inner cylinder 17 appears and allows the entire separating chamber to be pivoted out laterally becomes.
  • the scrapers 32 can be pulled up out of the grooves 33 in the axial direction and, if necessary, new ones can be inserted.
  • the now accessible slide ring 44 can now be inspected and, if necessary, replaced.
  • the two blades 13 and 37 are also accessible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Centrifugal Separators (AREA)
EP92100954A 1991-02-26 1992-01-22 Epurateur de suspensions pâteuses Expired - Lifetime EP0501134B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4105903A DE4105903C2 (de) 1991-02-26 1991-02-26 Vollmantelzentrifuge als Reiniger für Stoffsuspensionen
DE4105903 1991-02-26

Publications (2)

Publication Number Publication Date
EP0501134A1 true EP0501134A1 (fr) 1992-09-02
EP0501134B1 EP0501134B1 (fr) 1995-06-07

Family

ID=6425848

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92100954A Expired - Lifetime EP0501134B1 (fr) 1991-02-26 1992-01-22 Epurateur de suspensions pâteuses

Country Status (3)

Country Link
US (1) US5257698A (fr)
EP (1) EP0501134B1 (fr)
DE (2) DE4105903C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999035331A2 (fr) * 1998-01-09 1999-07-15 Huber Albert M Centrifugeuse a enveloppe pleine pour melanges, en particulier pour suspensions de matieres fibreuses utilisees dans l'industrie du papier

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19527039C5 (de) * 1995-07-25 2004-02-26 Westfalia Separator Ag Auslaßdüse für Zentrifugentrommeln
US5675247A (en) * 1995-08-10 1997-10-07 Automation Technology, Inc. Dual head armature processing method and apparatus
PT102320A (pt) * 1999-06-09 2000-12-29 Finidro Financiamento Energeti Processo e aparelho para a preparacao de pasta de papel a partir de aparas de papel
DE10205239A1 (de) * 2002-02-08 2003-08-21 Voith Paper Patent Gmbh Verfahren zur Auskleidung von zur Aufbereitung von Altpapier bestimmten verschleißgefährdeten Apparaten
DE102012111801A1 (de) 2012-12-05 2014-06-05 Gea Mechanical Equipment Gmbh Auslassdüse für eine Zentrifugentrommel
DE102016108057B4 (de) 2016-04-29 2018-08-02 Gea Mechanical Equipment Gmbh Auslassdüse für eine Zentrifugentrommel, Zentrifugentrommel und Montagewerkzeug

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH253544A (it) * 1943-09-03 1948-03-15 Crosti Piero Macchina centrifugatrice di fluidi a flusso continuo.
DE2063063A1 (de) * 1970-12-22 1972-07-13 Amberger Kaolinwerke Gmbh, 8452 Hirschau Verfahren und Vorrichtungen zur Förderung der Flockulierung und der Schlammbewegung in Vollmantelzentrifugen
US4332350A (en) * 1980-07-30 1982-06-01 Mcclellan Jack A Centrifuge apparatus for separating entrained solids from industrial waste water
EP0359682A1 (fr) * 1988-09-13 1990-03-21 E. + M. Lamort Société Anonyme dite: Dispositif pour la séparation sélective de particules dans un liquide, notamment pour l'épuration de suspensions fibreuses papetières

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA521185A (fr) * 1956-01-31 G. Mclean Lyle Separateurs a air pour matieres granulaires
GB722120A (en) * 1951-04-02 1955-01-19 Miag Muehlenbau & Ind Gmbh Separator for pneumatically conveyed solid substances
US2748668A (en) * 1952-07-11 1956-06-05 Beloit Iron Works Separator-pumping operation for paper stock
DE1220392B (de) * 1961-02-21 1966-07-07 Freiberg Papier Maschwerke Wirbelabscheider zum Reinigen von Aufschwemmungen, insbesondere Faserstoffaufschwemmungen
GB962386A (en) * 1963-04-08 1964-07-01 Insinooritoimisto Engineeringb An improved hydraulic classifier
FR1450895A (fr) * 1964-10-06 1966-06-24 Werkspoor Nv Centrifugeuse pour la séparation d'un mélange de deux phases liquides en fonctionnement continu
GB1366170A (en) * 1971-10-15 1974-09-11 Ec Corp Processes and apparatus for effecting exchange crystallisation and co mponent separation
SU663436A1 (ru) * 1977-12-12 1979-05-25 Ордена Трудового Красного Знамени Новочеркасский Политехнический Институт Им. Серго Орджоникидзе Гидроциклон дл очистки природных и сточных вод от механических примесей
FR2478489B1 (fr) * 1980-03-21 1985-08-30 Centre Tech Ind Papier Procede et dispositif pour la separation de particules dans un fluide, notamment pour l'epuration de suspensions papetieres
FR2596668B1 (fr) * 1986-04-04 1989-12-22 Alsthom Separateur centrifuge pour liquide

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH253544A (it) * 1943-09-03 1948-03-15 Crosti Piero Macchina centrifugatrice di fluidi a flusso continuo.
DE2063063A1 (de) * 1970-12-22 1972-07-13 Amberger Kaolinwerke Gmbh, 8452 Hirschau Verfahren und Vorrichtungen zur Förderung der Flockulierung und der Schlammbewegung in Vollmantelzentrifugen
US4332350A (en) * 1980-07-30 1982-06-01 Mcclellan Jack A Centrifuge apparatus for separating entrained solids from industrial waste water
EP0359682A1 (fr) * 1988-09-13 1990-03-21 E. + M. Lamort Société Anonyme dite: Dispositif pour la séparation sélective de particules dans un liquide, notamment pour l'épuration de suspensions fibreuses papetières

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999035331A2 (fr) * 1998-01-09 1999-07-15 Huber Albert M Centrifugeuse a enveloppe pleine pour melanges, en particulier pour suspensions de matieres fibreuses utilisees dans l'industrie du papier
WO1999035331A3 (fr) * 1998-01-09 1999-09-10 Albert M Huber Centrifugeuse a enveloppe pleine pour melanges, en particulier pour suspensions de matieres fibreuses utilisees dans l'industrie du papier

Also Published As

Publication number Publication date
EP0501134B1 (fr) 1995-06-07
DE59202422D1 (de) 1995-07-13
DE4105903C2 (de) 1994-10-06
US5257698A (en) 1993-11-02
DE4105903A1 (de) 1992-08-27

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