EP1732697B9 - Centrifugeuse a bol plein comportant un deversoir et plaque de deviation stationnaire associee a ce dernier - Google Patents

Centrifugeuse a bol plein comportant un deversoir et plaque de deviation stationnaire associee a ce dernier Download PDF

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Publication number
EP1732697B9
EP1732697B9 EP05716484.0A EP05716484A EP1732697B9 EP 1732697 B9 EP1732697 B9 EP 1732697B9 EP 05716484 A EP05716484 A EP 05716484A EP 1732697 B9 EP1732697 B9 EP 1732697B9
Authority
EP
European Patent Office
Prior art keywords
solid
centrifuge according
drum
bowl centrifuge
deflection disc
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
EP05716484.0A
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German (de)
English (en)
Other versions
EP1732697A1 (fr
EP1732697B1 (fr
Inventor
Helmut Figgener
Markus Fleuter
Ulrich Horbach
Ludger HORSTKÖTTER
Martin Overberg
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
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GEA Mechanical Equipment GmbH
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Filing date
Publication date
Application filed by GEA Mechanical Equipment GmbH filed Critical GEA Mechanical Equipment GmbH
Publication of EP1732697A1 publication Critical patent/EP1732697A1/fr
Application granted granted Critical
Publication of EP1732697B1 publication Critical patent/EP1732697B1/fr
Publication of EP1732697B9 publication Critical patent/EP1732697B9/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 centrifuge according to the preamble of claim 1.
  • the annular gap creates a flow resistance which is greater, the smaller the axial distance between the weir and the throttle plate. As the flow resistance increases, however, a larger liquid pressure at the passage is required, which leads to an increase in the liquid level in the centrifugal drum. If the axial distance between the weir and the throttle plate is increased, falls the liquid level in the centrifugal drum to a value which is caused by the passage of the weir without such a throttle disk.
  • the DE PS 966,080 shows a Vollmantelschneckenzentrifuge, the liquid discharge from the drum is directed radially outward, where the liquid is collected in a kind of annulus with a nearly circular cross-section. Radial outward from the drum directed liquid discharges also shows the DE PS 706 968 ,
  • the DE 25 15 452 A1 also shows behind the axially directed liquid discharges a co-rotating with the drum plate, which deflects the exiting liquid almost 180 ° in the opposite axial direction.
  • the US 20 83 899 shows a centrifuge with vertical axis of rotation without throttle disc.
  • the FR 20 57 600 and the FR 20 54 722 show in each case solid bowl centrifuges with axially directed to the axis of rotation liquid discharge, where exiting liquid can splash back from a wall behind the outlets back to the drum.
  • the baffle is not a flat disc but a kind of "sleeve-like" component with an at least over part of the axial extension or the entire axial extension changing - here enlarging - inner diameter.
  • the deflection disc thus has a defined axial extension (in extension of the axis of rotation of the drum) and an inner and an outer sheath, wherein the distance of the inner shell to the axis of rotation is not constant but expands or increases.
  • an annular gap is formed between the passage and an orifice plate outside the centrifugal drum or between the passage and another component, which directs the liquid radially outward and preferably wholly or partially over its axial extent away from the expanding deflection disc is surrounded, so that the direct radial ejection of the liquid phase is prevented from this annular gap.
  • the deflection disk has an advantageous effect, because it prevents the exiting liquid from hitting the drum again.
  • the expanding baffle has an opening angle ⁇ to a perpendicular to the axis of rotation D of the drum or parallel to the drum cover extending plane which is greater than 0 ° and smaller than 90 °.
  • the expanding baffle on the inner shell at an angle 90 ° - ⁇ to the axis of rotation (D) of the drum, which is greater than 0 ° and less than 90 °.
  • the baffle preferably has such a shape and is arranged or integrated into the arrangement such that the liquid first emerges axially outwardly of the drum until it strikes a wall or disk from which it spouts substantially radially outward, wherein it impinges on the expanding baffle, which prevents the exiting liquid directly radially on wall (s) - in particular aligned parallel to the axis of rotation walls - the catching chamber, so that the noise is reduced compared to a configuration without a deflecting disc.
  • the liquid initially enters axially - i. parallel to the axis of rotation of the drum - outwardly of the drum until it hits a wall from which it is directed substantially radially outwards.
  • it meets the expanding baffle, which prevents the leaking fluid from getting back to the drum.
  • the expanding geometry of the baffle has several advantages. On the one hand, it makes it possible to significantly reduce the operating noise of the centrifuge, since the liquid is no longer injected directly from the annular gap, in particular between the throttle plate or other component and the drum lid against walls of the trap chamber but is deflected by an angle which the opening angle of the deflection disc equivalent. As a result, the liquid is no longer perpendicular to the housing walls of the catching chamber, what the noise significantly reduced. This is a great advantage in practice given the high RPM of eg 3500 RPM.
  • Another advantage is a reduction in power consumption due to the initially rapid discharge from the inner region, in particular away from the centrifugal drum surface.
  • the inner diameter of the baffle is larger than the outer diameter, on which the passage openings of the centrifugal drum are arranged.
  • the baffle connects axially directly to the passage openings, so that leakage of liquid between the drum cover and the baffle is prevented.
  • lugs or the like are provided at the passage openings - which axially overlap the deflection disk.
  • the deflection disk has an annular, conically widening shape.
  • the opening angle of the inner jacket of the deflection disk is preferably between 5 and 45 °, in particular 10 to 30 °. Especially by the latter angular range can be particularly advantageous results, in particular a particularly significant noise minimization achieve.
  • the opening angle of the deflection disc may be constant or vary over the axial extent and / or in the circumferential direction.
  • Fig. 1 shows a Vollmantelzentrifuge trained as a solid bowl screw centrifuge with a rotatable centrifugal drum 1 with a horizontal axis of rotation.
  • a likewise rotatable screw 2 is arranged, wherein in operation i.allg .. between the centrifugal drum 1 and the screw 2, a differential speed is maintained.
  • the centrifugal drum 1 is closed by an axial drum cover 3, which is provided with at least one - fixed or adjustable by means of diaphragms 13 - weir 4 for discharging a liquid phase from the centrifugal drum.
  • the weir 4 comprises a passage with at least one or more passage openings 5 in the drum cover 3 and with a throttle disk 6 arranged outside the centrifugal drum 3 in front of the passage openings 5, which is designed as a non-co-rotating part during operation and whose distance from the passage openings 5 is variable.
  • a collar-like projection 19 of the weir axially from the drum cover 3. This can be realized, for example, by by means of sleeves in / at the passage openings 5 or by means of a ring or a second diaphragm of a different diameter.
  • the changing of the axial distance between the passage openings 5 and the throttle disk 6 can be achieved, for example, by an axial movement by displacing or pivoting the throttle disk 6 in front of the passage openings 5, e.g. done by means of actuators.
  • the construction corresponds in principle to the generic state of the art.
  • the throttle plate 6 is associated with a ring-shaped deflection (or “deflecting") 12, which here has a particularly advantageous tapered shape, wherein the deflection plate 12 preferably covers the annular gap 8 over its entire length and expands away from the passage openings 5 away.
  • the opening angle ⁇ of the inner shell 7 of the baffle 12 - see Fig. 2 - Relative to the perpendicular to the axis of rotation D of the drum or to a parallel to the drum cover extending plane E is preferably between 5 and 45 °, in particular between 10 ° and 30 °.
  • the opening angle ⁇ is preferably constant over the entire radial and axial extent of the deflection disk 12. It may also change abruptly or continuously, e.g. at a crease of 15 to 20 °.
  • baffle 12 it is also conceivable in particular a multi-part, in particular two-part design of the baffle 12 in order to realize the widening shape of the baffle 12 constructively in a simple manner.
  • the opening angle is selected such that the wall 9 is not reached directly outside of the catching chamber 11 from the exiting product jet.
  • a spiral housing geometry of the deflection disk 12, similar to the spiral housing of centrifugal pumps, is conceivable (not shown here).
  • the weir comprises the passage openings 5 in the drum cover 3 but no throttle disk 6.
  • the liquid flows rather directly against another component - here an annular disk 14 in front of or on a transmission housing 18 - which is designed as non-co-rotating during operation part.
  • the annular gap 8 ' which the deflecting disk 12 partially covers outwards here, is formed between the drum cover 3 and the further component annular disk 14.
  • the flow conditions are similar here to Fig. 2 optimized (see Fig. 4 ).
  • the baffle 12 may also have a relative to the axial length of the annular gap 8 'greater extent than shown in the figures.
  • the attachment of the preferably made of sheet metal or sheets cheap manufactured baffle 12 can be done in various ways, so via bolts 15 or 16 in axial ( Fig. 1 and 3 ) or radial ( Fig. 5 ) Alignment which extend from surrounding walls 9, 10 or 10 to the baffle 12 or by means of a particularly advantageous stabilizing planar ring 17 between the outer jacket of the baffle 12 and the wall 9 (FIG. Fig. 6 ).
  • the arrangement of the fastening bolt or the fastening ring 17 in the radial direction reduces the risk of erosion thereof, since this is arranged quasi in the flow shadow of the baffle 12.
  • the number of fastening bolts is variable and will usually be at least three. ⁇ U> reference numerals ⁇ / u> centrifugal drum 1 slug 2 drum lid 3 weir 4 passage opening 5 throttle disc 6 inner sheath 7 annular gap 8, 8 ' walls 9, 10 trap chamber 11 deflector 12 weir 13 washer 14 bolt 15, 16 ring 17 gearbox 18 approach 19

Landscapes

  • Centrifugal Separators (AREA)

Claims (19)

  1. Centrifugeuse à bol plein, en particulier centrifugeuse à vis sans fin à bol plein, avec
    a) un tambour centrifuge (1) capable de rotation autour d'un axe horizontal,
    b) présentant un déversoir pour évacuer un liquide hors du tambour centrifuge (1),
    c) lequel présente un passage avec au moins une ou plusieurs ouvertures d'écoulement (5) dans une partie d'extrémité axiale ou un couvercle de tambour (3),
    caractérisée en ce que
    d) il est prévu avant le couvercle de tambour (3) à l'extérieur du tambour centrifuge (1) une plaque formant déflecteur (12) fixe en fonctionnement qui s'écarte au moins par zones du couvercle de tambour (3) et qui présente une enveloppe intérieure dont la distance par rapport à l'axe de rotation n'est pas constante mais s'élargit ou augmente,
    e) un espace annulaire (8, 8') étant formé entre le passage (4) et la plaque formant déflecteur (6) à l'extérieur du tambour centrifuge ou entre le passage (4) et une autre pièce, lequel est de préférence entouré entièrement ou partiellement, au-delà de son étendue axiale, par la plaque formant déflecteur (12) évasée.
  2. Centrifugeuse à bol plein selon la revendication 1, caractérisée en ce que la plaque formant déflecteur (12) évasée présente sur l'enveloppe intérieure (7) un angle d'ouverture γ supérieur à 0° et inférieur à 90° par rapport à un plan (c) perpendiculaire à l'axe de rotation (D) du tambour ou parallèle au couvercle de tambour (3).
  3. Centrifugeuse à bol plein selon l'une des revendications précédentes, caractérisée en ce que la plaque formant déflecteur présente une forme annulaire s'élargissant en cône.
  4. Centrifugeuse à bol plein selon l'une des revendications précédentes, caractérisée en ce que le liquide sort d'abord du tambour vers l'extérieur dans le sens axial jusqu'à ce qu'il atteigne une paroi ou une plaque à partir de laquelle il est projeté vers l'extérieur sensiblement dans le sens radial et atteint alors la plaque formant déflecteur évasée qui empêche le liquide sortant de frapper directement la ou les parois (9) de la chambre de collecte, ce qui diminue le bruit produit.
  5. Centrifugeuse à bol plein selon l'une des revendications précédentes, caractérisée en ce que la plaque formant déflecteur (12) évasée présente sur l'enveloppe intérieur (7) un angle 90°-γ supérieur à 0° et inférieur à 90° par rapport à l'axe de rotation (D) du tambour.
  6. Centrifugeuse à bol plein selon l'une des revendications précédentes, caractérisée en ce que le plus petit diamètre intérieur de la plaque formant déflecteur (12) est plus grand que le diamètre extérieur sur lequel sont disposées les ouvertures de passage (5).
  7. Centrifugeuse à bol plein selon l'une des revendications précédentes, caractérisée en ce que la plaque formant déflecteur se raccorde directement aux ouvertures de passage (5) dans le sens axial.
  8. Centrifugeuse à bol plein selon l'une des revendications précédentes, caractérisée en ce qu'est formé sur les ouvertures de passage (5) une saillie (19) qui dépasse du tambour dans le sens axial et qui chevauche la plaque formant déflecteur (12) dans le sens axial.
  9. Centrifugeuse à bol plein selon l'une des revendications précédentes, caractérisée en ce que l'angle d'ouverture (γ) de la plaque formant déflecteur (12) est compris entre 5° et 45°.
  10. Centrifugeuse à bol plein selon la revendication 9, caractérisée en ce que l'angle d'ouverture (γ) de la plaque formant déflecteur (12) est compris entre 10° et 30°.
  11. Centrifugeuse à bol plein selon l'une des revendications précédentes, caractérisée en ce que l'angle d'ouverture (γ) de la plaque formant déflecteur (12) est constant.
  12. Centrifugeuse à bol plein selon l'une des revendications 1 à 10, caractérisée en ce que l'angle d'ouverture (γ) de la plaque formant déflecteur (12) change sur l'étendue axiale de celle-ci et/ou dans le sens de la circonférence.
  13. Centrifugeuse à bol plein selon la revendication 11, caractérisée en ce que l'angle d'ouverture (γ) de la plaque formant déflecteur (12) change, en particulier augmente, de façon continue au-delà du tracé axial de la plaque formant déflecteur (12) ou se modifie brusquement.
  14. Centrifugeuse à bol plein selon l'une des revendications précédentes, caractérisée en ce que la plaque formant déflecteur (12) est conçue en plusieurs parties, en particulier en deux parties.
  15. Centrifugeuse à bol plein selon l'une des revendications précédentes, caractérisée en ce que la distance entre le passage (4) et la plaque d'étranglement (6) est variable.
  16. Centrifugeuse à bol plein selon l'une des revendications précédentes, caractérisée en ce qu'elle est conçue comme une centrifugeuse à vis sans fin à bol plein avec une vis sans fin (2) rotative disposée dans le tambour centrifuge (1).
  17. Centrifugeuse à bol plein selon l'une des revendications précédentes, caractérisée en ce que la plaque formant déflecteur (12) est fixée sur une paroi d'entourage (9, 10) dans le sens axial à l'aide de boulons (15 ou 16).
  18. Centrifugeuse à bol plein selon l'une des revendications précédentes, caractérisée en ce que la plaque formant déflecteur (12) est fixée sur une paroi (9, 10) qui l'entoure dans le sens radial à l'aide de boulons (15 ou 16).
  19. Centrifugeuse à bol plein selon l'une des revendications précédentes, caractérisée en ce que la plaque formant déflecteur (12) est fixée sur une paroi (9, 10) qui l'entoure à l'aide d'un anneau (17).
EP05716484.0A 2004-04-06 2005-03-31 Centrifugeuse a bol plein comportant un deversoir et plaque de deviation stationnaire associee a ce dernier Not-in-force EP1732697B9 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202004005353U DE202004005353U1 (de) 2004-04-06 2004-04-06 Vollmantelzentrifuge mit einem Wehr mit einer Drosselscheibe
PCT/EP2005/003399 WO2005097336A1 (fr) 2004-04-06 2005-03-31 Centrifugeuse a bol plein comportant un deversoir et plaque de deviation stationnaire associee a ce dernier

Publications (3)

Publication Number Publication Date
EP1732697A1 EP1732697A1 (fr) 2006-12-20
EP1732697B1 EP1732697B1 (fr) 2016-05-04
EP1732697B9 true EP1732697B9 (fr) 2016-10-19

Family

ID=34877804

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05716484.0A Not-in-force EP1732697B9 (fr) 2004-04-06 2005-03-31 Centrifugeuse a bol plein comportant un deversoir et plaque de deviation stationnaire associee a ce dernier

Country Status (6)

Country Link
US (1) US7753834B2 (fr)
EP (1) EP1732697B9 (fr)
CN (1) CN1938099B (fr)
DE (1) DE202004005353U1 (fr)
DK (1) DK1732697T3 (fr)
WO (1) WO2005097336A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10203652B4 (de) * 2002-01-30 2006-10-19 Westfalia Separator Ag Vollmantel-Schneckenzentrifuge mit einem Wehr
DE202004005353U1 (de) * 2004-04-06 2005-08-18 Westfalia Separator Ag Vollmantelzentrifuge mit einem Wehr mit einer Drosselscheibe
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.
US9321058B2 (en) * 2010-07-01 2016-04-26 Centrisys Corp. Centrifugal liquid separation machine to efficiently flow multi-phase solids from a heavy phase discharge stream with a solids plow
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
US8956272B2 (en) * 2011-12-30 2015-02-17 Vanderbeken Ent. Ltd Method and apparatus for removal of tars or resins from a scrubber liquid using a centrifuge with a discharge chamber scraper
DE102012106226A1 (de) * 2012-07-11 2014-01-16 Gea Mechanical Equipment Gmbh Vollmantel-Schneckenzentrifuge mit Überlaufwehr
DE102019135215A1 (de) * 2019-12-19 2021-06-24 Flottweg Se Querscheibe einer Zentrifugenschnecke und Vollmantelschneckenzentrifuge

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US2083899A (en) * 1932-11-30 1937-06-15 Centrifuge Company Apparatus for centrifugal separation
DE706968C (de) * 1936-06-23 1941-06-10 Gutehoffnungshuette Oberhausen Schleuder fuer Fluessigkeiten mit schlammigen bis feinkoernigen Bestandteilen
DE966080C (de) * 1941-08-14 1957-07-04 Starcosa Maschinen Und Appbau Trennschleuder
NL157912B (fr) 1941-08-14 Schering Ag
FR2054722A5 (en) * 1969-07-24 1971-05-07 Saget Pierre Centrifuge sepg two liquids and a solid
FR2057600A5 (en) * 1969-08-29 1971-05-21 Saget Pierre Centrifuge with modified solids discharge - conveyor
FR2120537A5 (en) * 1971-01-07 1972-08-18 Saget Pierre Continuous centrifugal separator - for liquids of similar density applicable with sediment present
DE2515452A1 (de) * 1975-04-09 1976-10-21 Mono Pumps Ltd Abscheidezentrifuge
DE2901607C2 (de) * 1979-01-17 1981-03-12 Westfalia Separator Ag, 4740 Oelde Vollmantelschneckenzentrifuge
SE459234B (sv) * 1987-10-15 1989-06-19 Alfa Laval Marine Power Eng Saett och utrustning foer invaendig diskning av en centrifugrotor
CN2157195Y (zh) * 1992-10-23 1994-02-23 农业部种子项目办公室 棉种稀硫酸脱绒离心机
DE4320265C2 (de) * 1993-06-18 1995-08-03 Westfalia Separator Ag Wehr für Vollmantelschleudertrommeln
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
JPH11197547A (ja) * 1998-01-13 1999-07-27 Kubota Corp 横型遠心分離機における分離水の排出装置
DE19948115A1 (de) * 1999-10-06 2001-04-12 Baker Hughes De Gmbh Zentrifuge zur Trennung von Feststoff-Flüssigkeitsgemischen
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DE202004005353U1 (de) * 2004-04-06 2005-08-18 Westfalia Separator Ag Vollmantelzentrifuge mit einem Wehr mit einer Drosselscheibe

Also Published As

Publication number Publication date
CN1938099A (zh) 2007-03-28
DK1732697T3 (en) 2016-08-22
DE202004005353U1 (de) 2005-08-18
CN1938099B (zh) 2010-07-07
EP1732697A1 (fr) 2006-12-20
US7753834B2 (en) 2010-07-13
US20080248940A1 (en) 2008-10-09
EP1732697B1 (fr) 2016-05-04
WO2005097336A1 (fr) 2005-10-20

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