EP1949966B1 - Centrifugeuse à vis sans fin à bol plein dotée d'une chicane de mesure - Google Patents

Centrifugeuse à vis sans fin à bol plein dotée d'une chicane de mesure Download PDF

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Publication number
EP1949966B1
EP1949966B1 EP08001302.2A EP08001302A EP1949966B1 EP 1949966 B1 EP1949966 B1 EP 1949966B1 EP 08001302 A EP08001302 A EP 08001302A EP 1949966 B1 EP1949966 B1 EP 1949966B1
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EP
European Patent Office
Prior art keywords
screw
screw blade
solid wall
pressure plate
wall helical
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.)
Active
Application number
EP08001302.2A
Other languages
German (de)
English (en)
Other versions
EP1949966A1 (fr
Inventor
Martin Dr.-Ing. Overberg
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 EP1949966A1 publication Critical patent/EP1949966A1/fr
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Publication of EP1949966B1 publication Critical patent/EP1949966B1/fr
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    • 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
    • B04B2001/2041—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 baffles, plates, vanes or discs attached to the conveying screw

Definitions

  • the invention relates to a solid bowl screw centrifuge with a baffle plate according to the preamble of claim 1.
  • baffles With solid bowl centrifuges, the use of baffles causes a build-up effect that affects the flow in the axial direction. In addition to this desired effect, there is also an influence on the flow in the circumferential direction.
  • the solids cake In order to achieve effective conveying of the solids which form a solids cake with the screw, it is necessary for the solids cake not to rotate with respect to the drum, but to glide as close to it as possible. Between the solids cake and the screw only a relative movement in the circumferential direction is fed.
  • the invention has the object to remedy the above-described problem of relatively high forces during operation in the area in which the baffle plate and the screw blade or the worm helix meet in the conveying direction, with simpler design means.
  • the at least one or the window-like openings bring several advantages with it.
  • the measure is structurally particularly simple to implement and inexpensive.
  • the snail extends on either side of the baffle plate so that it is cut by it.
  • FIG. 3 shows a known solid bowl screw centrifuge with a rotatable drum 1 with horizontal axis of rotation D.
  • a rotatable with a differential speed to the drum 1 screw 2 is arranged, which has a helical screw blade 3, which is arranged on the outer circumference of a screw body 4.
  • An inlet pipe 5 serves to feed a product to be processed via a distributor 6 into the drum 1.
  • At least one liquid outlet 7 and a solids discharge 8 serve to discharge at least one liquid phase and at least one solid phase.
  • baffle plate 9 On the worm body 4, at least one baffle plate 9 is arranged in addition to the screw 3, which is formed from a substantially completely around the worm body 4 circumferential ring or disc element here.
  • the baffle plate 9 intersects in at least one peripheral region with the baffle plate 9, wherein wedge-shaped regions 10, 13 are formed between the baffle plate 9 and the screw blade 3.
  • first wedge region 10 In the flow direction of the solids for the solids discharge axially "first" wedge region 10 according to the invention at least one window-like opening 11, in the screw blade 3, formed, which allows a flow of material through the Scheckenblatt 3.
  • a corresponding window-like opening 12 may be provided in a further wedge area 13, which is formed on the other side of the baffle plate 9 in the region in which it meets the worm blade 3.
  • Each of the apertures 11, 12 is preferably formed such that in each case a web of material 14, 15 and 16, 17 of the screw blade 3 is still standing on the inner and / or outer circumference of the screw body 4.
  • the outer material webs 14, 15 may be reinforced by welds or the like. To strengthen the construction and to avoid imbalances by higher mass in this area.
  • the openings 11, 12 can also start directly on the outer circumference of the screw body and / or enforce it radially completely outwards.
  • the distance of the edge of the apertures 10, 11 to the baffle plate should be particularly preferred 0 mm, preferably less than 10 mm.

Claims (7)

  1. Centrifugeuse à vis sans fin à bol plein avec
    a. un tambour (1) rotatif et une vis sans fin (2) disposée dans le tambour (1) et pouvant tourner à une vitesse de rotation différente de celle du tambour (1), qui comporte au moins une pale de vis sans fin (3) en spirale qui est disposée sur la surface extérieure d'un corps de vis sans fin (4),
    b. et avec au moins une chicane de mesure (9) disposée sur le corps de vis sans fin (4) qui rencontre la pale de vis sans fin (3) dans au moins une zone (19, 18) de sorte qu'il se crée une zone en forme de coin (10, 13) entre la chicane de mesure (9) et la pale de vis sans fin (3),
    c. dans laquelle au moins une ouverture en forme de fenêtre (11), permettant l'écoulement de matière à travers la pale de vis sans fin (3), est formée dans la pale de vis sans fin (3) dans l'au moins une zone en forme de coin (10),
    caractérisée en ce que
    d. la chicane de mesure rencontre la pale de vis sans fin (3) dans deux zones en forme de coin (19, 18) et en ce qu'une des ouvertures en forme de fenêtre (11, 12) est formée dans la pale de vis sans fin (3) de part et d'autre de la chicane de mesure (9) dans une des deux zones en forme de coin (10, 13).
  2. Centrifugeuse à vis sans fin à bol plein selon la revendication 1, caractérisée en ce que l'au moins une ouverture ou chacune des ouvertures (11, 12) est limitrophe dans le sens de la circonférence de la zone (18, 19) correspondante dans laquelle la chicane de mesure (9) rencontre la pale de vis sans fin (3).
  3. Centrifugeuse à vis sans fin à bol plein selon l'une des revendications précédentes, caractérisée en ce que l'au moins une ouverture (11, 12) est conformée de telle manière qu'il reste sur la circonférence intérieure du corps de vis sans fin (3) une barrette de matériau (16, 17) de la pale de vis sans fin (3).
  4. Centrifugeuse à vis sans fin à bol plein selon l'une des revendications précédentes, caractérisée en ce que l'au moins une ouverture (11, 12) est conformée de telle sorte qu'il reste sur la circonférence extérieure du corps de vis sans fin (3) une barrette de matériau (14, 15) de la pale de vis sans fin (3).
  5. Centrifugeuse à vis sans fin à bol plein selon la revendication 4, caractérisée en ce que les barrettes de matériau extérieures (14, 15) sont renforcées.
  6. Centrifugeuse à vis sans fin à bol plein selon l'une des revendications précédentes, caractérisée en ce que les ouvertures (11, 12) s'amorcent directement sur la circonférence extérieure du corps de vis sans fin (4).
  7. Centrifugeuse à vis sans fin à bol plein selon la revendication 6, caractérisée en ce que les ouvertures (11, 12) s'amorcent directement sur la circonférence extérieure du corps de vis sans fin (4) et traversent complètement la pale de vis sans fin (3) dans le sens radial.
EP08001302.2A 2007-01-26 2008-01-24 Centrifugeuse à vis sans fin à bol plein dotée d'une chicane de mesure Active EP1949966B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007003928A DE102007003928A1 (de) 2007-01-26 2007-01-26 Vollmantel-Schneckenzentrifuge mit einer Stauscheibe

Publications (2)

Publication Number Publication Date
EP1949966A1 EP1949966A1 (fr) 2008-07-30
EP1949966B1 true EP1949966B1 (fr) 2016-05-04

Family

ID=39295058

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08001302.2A Active EP1949966B1 (fr) 2007-01-26 2008-01-24 Centrifugeuse à vis sans fin à bol plein dotée d'une chicane de mesure

Country Status (2)

Country Link
EP (1) EP1949966B1 (fr)
DE (1) DE102007003928A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009001054A1 (de) 2009-02-20 2010-09-02 Hiller Gmbh Vollmantel-Schneckenzentrifuge mit Grobstoff-Auslass

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE543072A (fr)
CH144065A (de) * 1930-01-24 1930-12-15 Ruesch Friedrich Werkzeug für spanabhebende Bearbeitungsmaschinen.
US4245777A (en) * 1979-08-30 1981-01-20 Pennwalt Corporation Centrifuge apparatus
DE4408717A1 (de) * 1994-03-15 1995-09-21 Metallgesellschaft Ag Schichtverbundelemente für den Verschleißschutz
DK143295A (da) * 1995-12-18 1997-06-19 Tetra Laval Holdings & Finance Dekantercentrifuge
US6572524B1 (en) * 2000-07-14 2003-06-03 Alfa Laval Inc. Decanter centrifuge having a heavy phase solids baffle
DE10125096A1 (de) * 2001-05-23 2002-11-28 Hiller Gmbh Dekantierzentrifuge

Also Published As

Publication number Publication date
DE102007003928A1 (de) 2008-08-07
EP1949966A1 (fr) 2008-07-30

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