EP2658656A1 - Centrifugeuse à vis sans fin et à bol plein, munie d'un déversoir - Google Patents

Centrifugeuse à vis sans fin et à bol plein, munie d'un déversoir

Info

Publication number
EP2658656A1
EP2658656A1 EP11794487.6A EP11794487A EP2658656A1 EP 2658656 A1 EP2658656 A1 EP 2658656A1 EP 11794487 A EP11794487 A EP 11794487A EP 2658656 A1 EP2658656 A1 EP 2658656A1
Authority
EP
European Patent Office
Prior art keywords
drum
solid bowl
centrifuge according
discharge channel
angle
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
EP11794487.6A
Other languages
German (de)
English (en)
Other versions
EP2658656B1 (fr
Inventor
Stefan Terholsen
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
Original Assignee
GEA Mechanical Equipment 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 GEA Mechanical Equipment GmbH filed Critical GEA Mechanical Equipment GmbH
Publication of EP2658656A1 publication Critical patent/EP2658656A1/fr
Application granted granted Critical
Publication of EP2658656B1 publication Critical patent/EP2658656B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B04B2001/2075—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 with means for recovering the energy of the outflowing liquid
    • 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.
  • DE 102 03 652 B4 discloses a solid bowl screw centrifuge with a device for discharging clarified liquid from a drum, the one
  • Drum cover having a passage to which a throttle device, in particular a throttle plate, is assigned, whose distance from the passage is variable.
  • the passage further nozzles are assigned to the outlet of the clarified liquid, which are aligned for energy saving inclined to the radial direction through the drum axis.
  • Nozzles on solid bowl centrifuges and their effect of energy saving with a corresponding orientation inclined to the drum axis are further known from DE 39 04 151 A1.
  • baffles can be assigned which of the liquid emerging from the drum.
  • the baffles are mounted on the outside of the overflow weir, for example, on the weir plates, for example, they are formed as flat sheets which are aligned parallel to the drum rotation axis, with the plane in which the flat Plates lie, the drum axis does not intersect and about an angle of about 45 ° with the radially extending straight line, which runs through the drum rotation axis and the respective passage opening.
  • the object of the invention is to provide a solid shell screw centrifuge optimized with regard to energy saving, which can also be regarded as advantageous from a hygienic point of view.
  • the weir plate has a material recess, which at least part of a discharge channel or a complete
  • discharge channel forms, wherein the discharge channel is formed such that it deflects out of the drum flow at an angle ß> 0 ° to the axis of rotation.
  • Liquids with fibrous solids may, in a complicated designed passage opening to the problem that the 50 fibers on exiting the housing in certain areas, so in for the
  • Form product deposits since a near-surface layer flow is formed, which can not rinse the central regions of the housing of solids 5. Due to the open design of the drainage channels, the o.g.
  • Outlet flows and thus can entrain solid particles. This is an advantage from a sanitary point of view but also constructive with regard to the reduced risk of the formation of potential imbalances from non-rotationally symmetrical
  • Liquid ring are flushed out asymmetrically or even the solid itself flows out of the outlet elements asymmetrically.
  • the present invention leaves the overflow weir directly to the weir plates on the drum cover and only the liquid which has already left the rotating system via the weir weir is deflected in the circumferential direction , After leaving the drum, no clearing effect can occur, the whole
  • a further advantage is that it is also avoided by the chosen constructions that the liquid contained in the housing exert too high unwanted additional 50 centrifugal forces on the drum.
  • Discharge channels can not fill with liquid, it forms only a relatively thin layer of liquid that exerts relatively little additional forces.
  • Liquid outflow is minimized from the ideal tangential direction.
  • the storage distance is shortened, which can be achieved due to the improved machine dynamics properties higher rotational speeds of the centrifuge, as the speed limiting natural frequencies to higher values
  • the design with an insert embedded in the drum wall offers the advantage that adjustments of the inner contour to product properties and also to operating parameters, such as, for example, the throughput capacity without changes of the drum wall are possible.
  • the inserts can also be easily exchanged.
  • FIG. 1 is a schematic view of a known Vollmantel-
  • Figs. 2-14 show various views, sections, representations and embodiments 50 of devices for draining liquid from one
  • Centrifuge drum formed on a drum lid of a centrifuge drum.
  • the figures are partially a schematic representation of a
  • Fig. 1 should first illustrate the basic structure of a solid bowl centrifuge. The drive together with control, a hood and other for the expert obvious elements are not shown here.
  • Fig. 1 shows a solid bowl screw centrifuge 1 with a preferably horizontal axis of rotation D rotatable drum 3, in which a likewise rotatable screw 5 is arranged.
  • the drum 3 and the screw 5 each have a substantially cylindrical portion and a conically tapered L5 portion.
  • An axially extending centric inlet pipe 7 serves to supply the
  • the screw 5 rotates at a slightly lower or greater speed than the drum 3 and promotes the ejected solid to the conical portion out of the drum 3 to the solids discharge 1 third
  • This adjustability can be achieved e.g. also simple manner via hole patterns 37 (see Fig. 5) with selectable radial
  • the hole patterns are shown for the sake of simplicity only in Fig. 5, but preferably provided in all embodiments.
  • the drum cover and / or the at least one device 23 for discharging liquid from the centrifuge drum can be replaced by a corresponding device 23 'of FIGS. 2 to 14 in the case of a solid bowl screw centrifuge.
  • FIGS. 2 to 4 First, the embodiments of FIGS. 2 to 4 will be described.
  • FIG. 3 and 4 show plan views of two different devices 23 'and Fig. 2 shows a section through a corresponding device 23'.
  • Passage opening 15 fully or partially covering weir plate 1 9.
  • the devices 23 'further each have a discharge channel 25, which is formed on the respective weir plate 1 9 and / or formed integrally therewith.
  • the weir plate 1 9 of Fig. 2 to 4 is preferably directly au Shen on
  • Drum cover 1 7 aligned parallel to the drum cover 17 at.
  • the weir 21 is placed in this area on a further au Shen at the bottom of the recess radius R27.
  • the material recess 27 on the outer side of the weir plate 1 9 preferably passes in alignment with the discharge channel 25. It thus forms the beginning of the discharge channel 25 itself.
  • the discharge channel 25 can (see Fig. 5) only from the
  • Material recess 27 are made when the weir plate 1 9 is sufficiently thick and the material recess corresponding to an inclination angle ⁇ (see Fig. 6) to the rotational direction U, is aligned.
  • the material recess but by a the weir plate on its side facing away from the drum 1 side
  • the discharge channel 25 is open at least on its radially inward-facing side and preferably also at its end facing away from the weir plate 1 9.
  • the discharge channel has lateral deflection walls 31 a, 31 b, which may be flat or bent.
  • the cross section of the drainage trough 25 - see e.g. Fig. 2 - can be designed in various ways. It is essential that the discharge channel 25 radially to
  • Deriving trough 25 can be reduced.
  • the cross-section of the discharge channel 25 can be configured correspondingly square (FIG. 3) or rather rounded (FIG. 4).
  • the cross-section can be constant over the length of the discharge channel or change.
  • the drainage channel 25 is formed on structurally particularly simple and inexpensive, and again insensitive to contamination manner only in that the weir plates 1 9 each no lengthening
  • the side walls 31 a, 31 b are not axially aligned in the circumferential direction but opposite to the direction of rotation obliquely or bent, in order to redirect the outflowing flow counter to the direction of rotation.
  • the weir plates 19 of FIGS. 5 and 6 are due to their
  • the overflow weir 21 of the embodiments according to FIGS. 2 to 6 is located at the entrance of the liquid in the material recess 27 of the weir plate 1 9, which thus determines the diameter of the liquid level in the drum.
  • the bottom wall 35 of the channel 25 extends in a straight line in the tangential direction.
  • the angle ⁇ is smaller than 0 °
  • FIGS. 7 and 8 show further embodiments of outlet elements which have a discharge channel 25 which is open radially inwardly.
  • the channel element 29 of the discharge channel has a shape running concentrically on a circular arc section with a constant radius. Therefore, in particular, the bottom wall 35, in whole or in sections, a rounded, in particular concentric to
  • FIGs. 2 to 8 relate to embodiments in which at least on one side of completely open drainage channels 25 in a weir plate 1 9 and preferably in an axial groove-like extension - channel element 29 -
  • Weir plate 1 9 are formed, it is also conceivable to deflect the effluent from the drum 1 liquid in the circumferential direction, that the drum cover itself has passage openings 1 5, which do not extend in the axial direction, but which with respect to the longitudinal axis D of the drum to a Angle ß are inclined.
  • the passage openings 1 5 are thus, for example, although cylindrical in itself, but oriented obliquely to the axis of rotation, wherein the angle ⁇ between the axis of rotation D and the central axis of the passage openings 1 5 sections in each case greater than 0 ° and less than 90 °.
  • the passage opening can also be curved in itself. Mixed forms of the described embodiments are readily feasible.
  • Each of the "inclined" passage openings 15 is preferably covered by a corresponding weir plate 19 up to a predetermined radius, whereby this covering weir plate 19 can itself be a "straight" one.
  • Overflow edge or weir edge 21 which is on a predetermined, preferably by means of hole patterns or the like. Adjustable radius.
  • FIGS. 1 and 12 show embodiments with inclined passage openings 15 in the end-face drum wall 17 and weir plates 19, which have a "grooved" bevelled contour in the manner of FIG. 6 or 7.
  • Fig. 1 3 further shows an embodiment which advantageously the inclined
  • FIG. 14 further illustrates the possibility in which
  • Drum cover may be used and then in turn may have holes 43 which are inclined to the drum axis D and D 'aligned.
  • the inserts 41 in the drum wall or in the drum cover can be configured in various ways.
  • the axial extent of the insert 41 may correspond to the axial thickness of the drum wall or the axial thickness of the drum cover (FIG. 14).

Landscapes

  • Centrifugal Separators (AREA)

Abstract

Centrifugeuse à vis et paroi pleine comprenant au moins un dispositif (23') pour évacuer des liquides clarifiés d'un tambour (3), a. le dispositif (23') comprenant au moins une ou plusieurs ouvertures de passage (15) ménagées dans un couvercle de tambour (17), b. respectivement une plaque de débordement (19) étant associée de préférence à ladite au moins une ouverture (15), chaque plaque de débordement comprenant et formant un déversoir (21) sur son bord intérieur radial, c. la plaque de débordement (19) présentant un évidement ménagé dans le matériau, ledit évidement formant au moins une partie d'une rigole d'évacuation (25) ou une rigole d'évacuation complète (25) et d. la rigole d'évacuation (25) étant formée de manière à dévier le flux sortant du tambour à un angle > 0° par rapport à l'axe de rotation.
EP11794487.6A 2010-12-27 2011-12-13 Centrifugeuse à vis sans fin et à bol plein, munie d'un déversoir Active EP2658656B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010061563A DE102010061563A1 (de) 2010-12-27 2010-12-27 Vollmantel-Schneckenzentrifuge mit Überlaufwehr
PCT/EP2011/072539 WO2012089492A1 (fr) 2010-12-27 2011-12-13 Centrifugeuse à vis sans fin et à bol plein, munie d'un déversoir

Publications (2)

Publication Number Publication Date
EP2658656A1 true EP2658656A1 (fr) 2013-11-06
EP2658656B1 EP2658656B1 (fr) 2018-01-31

Family

ID=45319113

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11794487.6A Active EP2658656B1 (fr) 2010-12-27 2011-12-13 Centrifugeuse à vis sans fin et à bol plein, munie d'un déversoir

Country Status (4)

Country Link
EP (1) EP2658656B1 (fr)
DE (1) DE102010061563A1 (fr)
DK (1) DK2658656T3 (fr)
WO (1) WO2012089492A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK176946B1 (da) * 2007-05-09 2010-06-14 Alfa Laval Corp Ab Centrifugalseparator og et væskefaseafløbsportelement
DK200801848A (en) * 2008-12-30 2010-07-01 Alfa Laval Corp Ab A decanter centrifuge and a decanter centrifuge discharge port memeber.
DK2659985T4 (da) * 2011-07-29 2020-02-03 Flottweg Se Fuldkappe-snekkecentrifuge med overløbskant
PL2551021T3 (pl) * 2011-07-29 2017-02-28 Andritz S.A.S. Wirówka i człon otworu wypływowego wirówki do zmniejszenia mocy
DE102012106226A1 (de) * 2012-07-11 2014-01-16 Gea Mechanical Equipment Gmbh Vollmantel-Schneckenzentrifuge mit Überlaufwehr
JP5220950B1 (ja) 2012-11-02 2013-06-26 巴工業株式会社 分離液噴射ノズル付き遠心分離機
EP2789395B2 (fr) * 2013-04-08 2019-11-06 Flottweg SE Centrifugeuse à vis a bol plein dotée d'un dispositif de récupération d'énergie
JP2017018868A (ja) * 2015-07-08 2017-01-26 株式会社Ihi 遠心分離装置
DE102017130904B4 (de) * 2017-12-21 2019-07-11 Flottweg Se Auslassvorrichtung einer Vollmantelschneckenzentrifuge mit einem Umlenkgerinne

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56129842U (fr) * 1980-03-03 1981-10-02
DE3822983A1 (de) * 1988-07-07 1990-01-11 Hiller Gmbh Vollmantel-schneckenzentrifuge
DE3900415A1 (de) 1989-01-09 1990-07-12 Teves Gmbh Alfred Unterdruck-bremskraftverstaerker
DE3904151A1 (de) 1989-02-11 1990-08-16 Heckmann Wolfgang Zentrifuge
JP3543597B2 (ja) 1997-12-22 2004-07-14 株式会社クボタ 横型遠心分離機における分離水の排出装置
DE10203652B4 (de) 2002-01-30 2006-10-19 Westfalia Separator Ag Vollmantel-Schneckenzentrifuge mit einem Wehr
US20040072668A1 (en) 2002-10-15 2004-04-15 Baker Hughes Incorporated Liquid phase discharge port incorporating chamber nozzle device for centrifuge
DK176946B1 (da) 2007-05-09 2010-06-14 Alfa Laval Corp Ab Centrifugalseparator og et væskefaseafløbsportelement
JP5009764B2 (ja) * 2007-12-06 2012-08-22 巴工業株式会社 横型遠心分離装置およびダム形成部材

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2012089492A1 *

Also Published As

Publication number Publication date
EP2658656B1 (fr) 2018-01-31
DK2658656T3 (en) 2018-05-07
WO2012089492A1 (fr) 2012-07-05
DE102010061563A1 (de) 2012-06-28

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