EP1998896B1 - Centrifugeuse a vis et enveloppe pleine dotee d'ouvertures d'evacuation pour le vidage partiel et le vidage residuel du tambour - Google Patents

Centrifugeuse a vis et enveloppe pleine dotee d'ouvertures d'evacuation pour le vidage partiel et le vidage residuel du tambour Download PDF

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Publication number
EP1998896B1
EP1998896B1 EP07727173.2A EP07727173A EP1998896B1 EP 1998896 B1 EP1998896 B1 EP 1998896B1 EP 07727173 A EP07727173 A EP 07727173A EP 1998896 B1 EP1998896 B1 EP 1998896B1
Authority
EP
European Patent Office
Prior art keywords
drum
solid
screw centrifuge
centrifuge according
bowl screw
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.)
Not-in-force
Application number
EP07727173.2A
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German (de)
English (en)
Other versions
EP1998896A1 (fr
Inventor
Ludger HORSTKÖTTER
Hans-Joachim Beyer
Ulrich Horbach
Johannes Droste
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.)
GEA Mechanical Equipment GmbH
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GEA Mechanical Equipment GmbH
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Publication date
Application filed by GEA Mechanical Equipment GmbH filed Critical GEA Mechanical Equipment GmbH
Publication of EP1998896A1 publication Critical patent/EP1998896A1/fr
Application granted granted Critical
Publication of EP1998896B1 publication Critical patent/EP1998896B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
    • 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
    • B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
    • B04B2001/2083—Configuration of liquid outlets

Definitions

  • the invention relates to a solid bowl screw centrifuge according to the preamble of claim 1.
  • Solid bowl centrifuges are known in various embodiments.
  • the liquid ring in the drum breaks down below a limit speed, so that the residual liquid collects at the bottom of the drum.
  • spring-loaded valves or valves are used.
  • the prior art is also the DE 36 209 12 mentioned, in which it is proposed to realize the liquid discharge solely through openings in the drum shell, which are associated with cone-like adjusting members, which are each actuated by means of separate piston-cylinder units or sliders.
  • Other constructions of the prior art disclose the DE 39 11 320 A1 and the DE 37 28 901 C1 ,
  • the at least one or more further outflow opening (s) is associated as closure means a relative to the drum axis axially displaceable, in-line with the drum co-rotating ring, which is associated with an actuator, with which the ring in a the Outlet opening (s) opening position and this - completely - closing position is displaceable.
  • Fig. 4 discloses a ring axially displaceable outside of a drum opening, but which can not close the opening, since its outer circumference is greater than the outer circumference of the drum in this area, that there is always a gap between the drum and ring elements.
  • the ring completely closes the drainage openings, since the inner diameter of the preferably circumferentially closed ring and the outer diameter of the drum are coordinated accordingly.
  • the actuating device is designed as a fluidic, in particular hydraulic actuator.
  • a fluidic, in particular hydraulic actuator builds compact, is particularly reliable and relatively easy to implement on the rotating drum.
  • the outflow openings are formed as openings, in particular holes or slots in the drum shell of the drum.
  • the latter variant lends itself to carry out particularly effective also a solid phase, as the slots one may have relatively large cross-section.
  • the elongated holes preferably extend in the circumferential direction.
  • the discharge openings are arranged axially in front of the continuously acting liquid discharge, which takes place in particular by means of a paring disc or by means of further openings in the drum lid.
  • drain openings are formed in the drum shell of the drum so that they lie radially outside of a separation and / or Klärtellerverses of plates, wherein the Klärtellerver is connected upstream of the continuous liquid discharge.
  • Plate packages in decanters are eg from the DE 100 65 060 A1 known.
  • the supplemental drainage holes are particularly useful because they can be used not only for draining a residual liquid level but also for partial draining (e.g., a partial volume of 101) during full speed production or processing.
  • an arrangement of the drainage openings in the drum cover can be realized.
  • Fig. 5 shows a solid bowl screw centrifuge with a rotatable about a horizontal axis of rotation drum 1, which has a cylindrical portion 2 and a tapered portion 3.
  • a rotatable screw 4 is arranged, wherein the design and operation is such that the drum 1 and the screw 4 during operation have a - usually relatively low - differential speed.
  • the drum bearing bears the reference number 26.
  • the solid bowl screw centrifuge serves to separate at least one solid phase and one or more liquid phases into a product passed through an inlet pipe 5 and a distributor 6 into the centrifugal space 7 in the drum 1. Due to the density difference, the solid phase accumulates outside in the drum 1, from where it is continuously conveyed from the drum 1 in the direction of a solids discharge 8 at the tapering end of the drum 1 and through the solids discharge 8.
  • the at least one liquid phase is continuously discharged at the opposite end of the drum by at least one liquid discharge.
  • This liquid discharge can in a generic drum on the type of Fig. 5 be realized according to the invention in various ways.
  • a drum cover 14 closing the drum 1 at the cylindrical end generally has at least one weir-like passage opening 9 which forms the liquid discharge (indicated in FIG Fig. 2 and 3 ). But it is also a derivative in another form, for example by a paring disc 22 ( Fig. 1 ) possible. If several liquid phases are to be discharged, these are removed by liquid outlets at different radii of the centrifugal space 7. The liquid discharge takes place continuously.
  • the centrifuge of Fig. 1 has in addition or modification of the known construction of Fig. 5 further - here advantageously circumferentially distributed on the outer circumference of the drum shell - discharge openings 10, which is associated with a closure device, which makes it possible to open the drain openings during operation of the drum 1 and to close.
  • a closure device which makes it possible to open the drain openings during operation of the drum 1 and to close.
  • at least two, in particular four or more, of the discharge openings 10 are distributed around the circumference.
  • discharge openings 10 are formed and distributed directly in the drum shell 15, has the advantage that they can be easily formed as breakthroughs in this component and that not a guide of drainage channels through the drum cover 14 is necessary.
  • the closure device for the discharge openings 10 is after Fig. 1 formed in a simple constructive design as a cylindrical ring 11 which rotates during operation with the drum 1 and which is guided axially displaceably on the drum cover 14 and / or connected to the drum cover member.
  • the discharge openings 10 are formed axially just before the drum cover 14 facing end portion of the drum shell.
  • the drum shell has at its axial end in front of the drum cover 14 on a radially projecting collar 15 which is provided with a gradation 12.
  • the outflow openings are advantageously formed in this area.
  • the ring 11 is guided here displaceably on the outer circumference of the drum cover 14.
  • the ring 11 rotates during operation with the drum 1, it is necessary to be able to move it axially in operation in a simple manner. This is preferably effected fluidically, in particular hydraulically.
  • an exemplified, advantageous hydraulic chamber 13 is formed, in which an inner, preferably disc-like, radial projection 16 of the ring 11 extends into, so that on one side of the neck 16 an opening chamber 13a (here left of the approach) and on the other side of the approach forms a closing chamber 13b.
  • the opening chamber has a larger radial extent than the closing chamber 13b.
  • the projection 16 extends radially from outside to inside into the hydraulic chamber 13. Radially inwardly, the opening chamber 13a and the closing chamber 13b are operatively connected.
  • Ribs 28 are arranged in the annular chamber 24 in order to take along the fluid, in particular water, which passes from the feed line 18, which is not rotating during operation, into the rotating annular chamber 24.
  • the ring 11 rests against the step 12 and closes the drainage openings 10 (Fig.l; Fig. 2 ). In the other operating position, however, he releases them ( Fig. 3 ), so that liquid is discharged from the drum through these further drainage openings 10.
  • a seal 27 in a groove in the step 12 seals the gap between the ring 11 and the drum in the closed position safely.
  • the hydraulic chamber 13 In the area facing away from the drum, the hydraulic chamber 13 is closed by a ring 19 fastened on the drum cover 14, which also allows the mounting of the ring 11.
  • a ring 19 is also found in Fig. 2 and 3 ,
  • the illustrated hydraulic chamber 13 is compact and simple. It could alternatively be realized in other constructive ways, as far as it realizes the required function.
  • the ring 11 of Fig. 1 to 3 rotates with the drum 1, since he must be able to completely close the discharge openings 10. He also lies directly outside on the drum 1 and the drum cover 14.
  • seals 29, 30 arranged on the outer circumference of the drum and the ring 19 to the inner periphery of the ring 11, so that substantially no fluid can escape through the gap between the ring and the drum or the drum cover and the ring 19.
  • sealing ring 31 between the drum cover 14 and the drum 1 and there is a sealing ring 32 between the ring 19 and the drum cover 14. Also between the drum cover 14 and the part 23, a sealing ring 33 is disposed around the hydraulic line 17 around. Additional seals 35, 36 can be found inside the paring disc.
  • the drum lid is internally conical.
  • this area could optionally be a separation and / or Klärtelleron from plates (not shown here), as it is known from DE 10065 060 is known.
  • the drainage openings 10 are then preferably formed in the drum shell of the drum 1 so that they lie radially outside of the separation and / or Klärtellerpaktes, the screw 4 nach- and the liquid discharge 9 is connected upstream.
  • the discharge openings 10 can also be used for the discharge of product and / or solid, which is located on the inner circumference of the drum shell has accumulated in this axial region of the drum.
  • the outflow openings 10 can also be located radially outside the screw 4 (not shown here).
  • drum cover is internally conical, so that on its outer peripheral contour is a very good possibility to accommodate the mechanism or here the hydraulic system for moving the ring 11.
  • the hydraulic chamber has an opening chamber and that one or more spring elements are provided for generating the closing force on the ring (not shown).
  • FIG. 4 An alternative embodiment still shows Fig. 4 , The structure of this embodiment largely corresponds to that of Fig. 1 , In contrast to Fig. 1 However, it is provided that the discharge openings 10 are still formed in the drum cover 14.
  • the outer contour of the drum 1 with the drum cover 14 as a whole does not change as a result, because only the contact area or the "interface" between the drum cover 14 and the drum 1 shifts:
  • the discharge openings 10 are formed axially in the end facing the drum 1 of the drum cover 14.
  • the drum cover 14 also has, at its axial end in front of the drum 1, preferably a radially projecting collar 37, which is provided with the step 12 and here outwardly aligned with the collar 15 of the drum 1.
  • the ring 11 is in turn guided displaceably on the outer circumference of the drum cover 14 here.

Landscapes

  • Centrifugal Separators (AREA)

Claims (19)

  1. Centrifugeuse à vis à bol plein dotée d'un tambour (1) muni d'un couvercle de tambour (14) qui peut tourner autour d'un axe de rotation de préférence horizontal et dans lequel est disposée une vis rotative (4), ainsi que d'une extraction continue de matières solides (8) à une extrémité du tambour (1) et d'une extraction continue de liquide à l'extrémité opposée du tambour (1) et d'au moins une ou plusieurs autre(s) ouverture(s) d'évacuation (10) dotée(s) d'un dispositif de fermeture et qui agit ou agissent de manière discontinue, caractérisée en ce qu'à la ou aux plusieurs autre(s) ouverture(s) d'évacuation (10) est associé un anneau (11) servant de dispositif de fermeture, qui peut coulisser axialement par rapport à l'axe du tambour et qui tourne avec le tambour (1) pendant le fonctionnement, auquel est associé un dispositif d'actionnement par lequel l'anneau peut être déplacé dans une position qui ouvre la ou les ouverture(s) d'évacuation (10) et une position qui la ou les ferme, l'anneau (11) étant guidé en coulissement sur la circonférence extérieure du couvercle de tambour (14).
  2. Centrifugeuse à vis à bol plein selon la revendication 1, caractérisée en ce que le dispositif d'actionnement est réalisé sous la forme d'un dispositif d'actionnement fluidique.
  3. Centrifugeuse à vis à bol plein selon la revendication 2, caractérisée en ce que le dispositif d'actionnement est réalisé sous la forme d'un dispositif d'actionnement hydraulique.
  4. Centrifugeuse à vis à bol plein selon l'une des revendications précédentes, caractérisée en ce que les ouvertures d'évacuation (10) sont réalisées sous la forme de percements, en particulier de trous ou de trous oblongs, dans l'enveloppe de tambour du tambour (1).
  5. Centrifugeuse à vis à bol plein selon l'une des revendications précédentes, caractérisée en ce que les ouvertures d'évacuation (10) sont disposées axialement avant l'extraction de liquide agissant de manière continue.
  6. Centrifugeuse à vis à bol plein selon l'une des revendications précédentes, caractérisée en ce que les ouvertures d'évacuation (10) sont réalisées dans l'enveloppe de tambour du tambour (1) de telle sorte qu'elles se situent radialement à l'extérieur d'un paquet de disques de séparation et/ou de clarification composé de disques, le paquet de disques de clarification étant placé avant l'extraction continue de liquide (9).
  7. Centrifugeuse à vis à bol plein selon l'une des revendications précédentes, caractérisée en ce que les ouvertures d'évacuation (10) sont situées radialement à l'extérieur de la vis (4).
  8. Centrifugeuse à vis à bol plein selon l'une des revendications précédentes, caractérisée en ce que les ouvertures d'évacuation (10) sont réalisées dans la zone d'extrémité de l'enveloppe de tambour tournée vers le couvercle de tambour (14).
  9. Centrifugeuse à vis à bol plein selon l'une des revendications précédentes, caractérisée en ce que l'enveloppe de tambour présente à son extrémité axiale, avant le couvercle de tambour (14), un collet (15) en saillie radiale qui est pourvu d'un gradin (12) et que les ouvertures d'évacuation (10) sont réalisées dans la zone de ce gradin (12).
  10. Centrifugeuse à vis à bol plein selon l'une des revendications précédentes, caractérisée en ce qu'une chambre hydraulique (13) est réalisée sur ou dans le couvercle de tambour (14).
  11. Centrifugeuse à vis à bol plein selon l'une des revendications précédentes, caractérisée en ce que le couvercle de tambour est réalisé intérieurement en forme de cône et que la chambre hydraulique (13) est réalisée sur sa circonférence extérieure.
  12. Centrifugeuse à vis à bol plein selon l'une des revendications précédentes, caractérisée en ce que la chambre hydraulique (13) présente une chambre d'ouverture et une chambre de fermeture (13a, 13b) qui sont en liaison fonctionnelle.
  13. Centrifugeuse à vis à bol plein selon l'une des revendications précédentes, caractérisée en ce que la chambre hydraulique (13) présente une chambre d'ouverture (13) et qu'un ou plusieurs éléments à ressort sont prévus pour produire la force de fermeture.
  14. Centrifugeuse à vis à bol plein selon l'une des revendications précédentes, caractérisée en ce qu'une saillie radiale intérieure (16), de préférence en forme de disque, de l'anneau (11) s'étend à l'intérieur de la chambre hydraulique (13), une conduite hydraulique (17) débouchant dans la chambre hydraulique (13).
  15. Centrifugeuse à vis à bol plein selon l'une des revendications précédentes, caractérisée en ce que la conduite hydraulique (17) traverse le couvercle de tambour (14) et les pièces s'y raccordant le cas échéant et est en liaison fonctionnelle avec une conduite hydraulique (18) sur le tube d'alimentation (5) non rotatif.
  16. Centrifugeuse à vis à bol plein selon l'une des revendications précédentes, caractérisée en ce que la chambre hydraulique (13) est fermée, dans sa zone éloignée du tambour, par un anneau (19) fixé sur le couvercle de tambour (14).
  17. Centrifugeuse à vis à bol plein selon l'une des revendications précédentes, caractérisée en ce que la chambre d'ouverture (13a) présente une ouverture de type buse (25) qui conduit de la chambre annulaire hydraulique (13) vers l'extérieur hors du tambour, pour évacuer du fluide hydraulique de la chambre hydraulique.
  18. Centrifugeuse à vis à bol plein selon l'une des revendications précédentes, caractérisée en ce que les ouvertures d'évacuation 10 sont réalisées dans le couvercle de tambour (14).
  19. Centrifugeuse à vis à bol plein selon l'une des revendications précédentes, caractérisée en ce que le couvercle de tambour (14) présente un collet (37) en saillie radiale qui est pourvu d'un gradin (12).
EP07727173.2A 2006-03-30 2007-03-21 Centrifugeuse a vis et enveloppe pleine dotee d'ouvertures d'evacuation pour le vidage partiel et le vidage residuel du tambour Not-in-force EP1998896B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102006015211 2006-03-30
DE102006030477A DE102006030477A1 (de) 2006-03-30 2006-07-01 Vollmantel-Schneckenzentrifuge mit Abflußöffnungen zur Teil- und Restentleerung der Trommel
PCT/EP2007/052697 WO2007113113A1 (fr) 2006-03-30 2007-03-21 Centrifugeuse a vis et enveloppe pleine dotee d'ouvertures d'evacuation pour le vidage partiel et le vidage residuel du tambour

Publications (2)

Publication Number Publication Date
EP1998896A1 EP1998896A1 (fr) 2008-12-10
EP1998896B1 true EP1998896B1 (fr) 2017-12-13

Family

ID=38008353

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07727173.2A Not-in-force EP1998896B1 (fr) 2006-03-30 2007-03-21 Centrifugeuse a vis et enveloppe pleine dotee d'ouvertures d'evacuation pour le vidage partiel et le vidage residuel du tambour

Country Status (8)

Country Link
US (1) US8465405B2 (fr)
EP (1) EP1998896B1 (fr)
CN (1) CN101516519B (fr)
AR (1) AR060333A1 (fr)
CL (1) CL2007000871A1 (fr)
DE (1) DE102006030477A1 (fr)
RU (1) RU2442659C2 (fr)
WO (1) WO2007113113A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10336350B4 (de) * 2003-08-08 2007-10-31 Westfalia Separator Ag Vollmantel-Schneckenzentrifuge, mit Schälscheibe
US8579783B2 (en) * 2009-07-02 2013-11-12 Andritz S.A.S. Weir and choke plate for solid bowl centrifuge
DK178254B1 (en) 2010-11-12 2015-10-12 Alfa Laval Corp Ab Centrifugal separator, abrasion resistant element and set of abrasion resistant elements for a centrifugal separator
CN107321507A (zh) * 2017-05-27 2017-11-07 宜兴市华鼎机械有限公司 一种可清除积液的卧式离心机

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GB998669A (en) * 1964-06-18 1965-07-21 Starcosa Gmbh Centrifugal separators
DE3620912A1 (de) * 1986-06-21 1987-12-23 Kloeckner Humboldt Deutz Ag Zentrifuge zum kontinuierlichen trennen von stoffen unterschiedlicher dichte
DE3728901C1 (en) * 1987-08-29 1988-11-17 Westfalia Separator Ag Weir for adjusting the level of liquid in solid-bowl centrifuge drums of worm centrifuges
DE3821486A1 (de) * 1988-06-25 1989-12-28 Westfalia Separator Ag Selbstentleerende schleudertrommel
DE3829158A1 (de) * 1988-08-27 1990-03-01 Heckmann Wolfgang Selbstentleerender trommelseparator
CN1033162A (zh) * 1988-12-06 1989-05-31 苏州市化工设备三厂 螺旋卸料沉降离心机
DE3911320A1 (de) * 1989-04-07 1990-10-11 Kloeckner Humboldt Deutz Ag Zentrifuge zum kontinuierlichen trennen von stoffen unterschiedlicher dichte
DE3921327A1 (de) * 1989-06-29 1991-01-03 Kloeckner Humboldt Deutz Ag Wehr zum einstellen des fluessigkeitsstandes in vollmantelzentrifugen
DE4130759A1 (de) * 1991-09-16 1993-03-18 Flottweg Gmbh Zentrifuge zur kontinuierlichen trennung von stoffen unterschiedlicher dichte
DE4320265C2 (de) * 1993-06-18 1995-08-03 Westfalia Separator Ag Wehr für Vollmantelschleudertrommeln
DE10021983A1 (de) * 2000-05-05 2001-11-08 Baker Hughes De Gmbh Vollmantelzentrifuge zur Trennung von Feststoff-Flüssigkeitsgemischen
DE10065060B4 (de) * 2000-12-27 2004-07-08 Westfalia Separator Ag Vollmantel-Schneckenzentrifuge mit Tellereinsatz
DE10148774B4 (de) * 2001-10-02 2005-08-11 Westfalia Separator Ag Vollmantel-Schneckenzentrifuge mit Druckgehäuse
JP3942402B2 (ja) * 2001-11-01 2007-07-11 寿工業株式会社 遠心分離装置
DE10203652B4 (de) * 2002-01-30 2006-10-19 Westfalia Separator Ag Vollmantel-Schneckenzentrifuge mit einem Wehr
DE10209925B4 (de) * 2002-03-07 2010-06-17 Gea Westfalia Separator Gmbh Dreiphasen-Vollmantel-Schneckenzentrifuge, Vollmantel-Schneckenzentrifuge und Verfahren zum Betreiben einer Dreiphasen-Vollmantel-Schneckenzentrifuge
DE10336350B4 (de) * 2003-08-08 2007-10-31 Westfalia Separator Ag Vollmantel-Schneckenzentrifuge, mit Schälscheibe

Also Published As

Publication number Publication date
CL2007000871A1 (es) 2011-03-25
DE102006030477A1 (de) 2007-10-04
US20100035742A1 (en) 2010-02-11
RU2442659C2 (ru) 2012-02-20
CN101516519B (zh) 2013-12-18
US8465405B2 (en) 2013-06-18
EP1998896A1 (fr) 2008-12-10
RU2008142859A (ru) 2010-05-10
CN101516519A (zh) 2009-08-26
WO2007113113A1 (fr) 2007-10-11
AR060333A1 (es) 2008-06-11

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