EP1968749B1 - Centrifugeuse a vis sans fin a bol plein - Google Patents

Centrifugeuse a vis sans fin a bol plein Download PDF

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Publication number
EP1968749B1
EP1968749B1 EP06841363.2A EP06841363A EP1968749B1 EP 1968749 B1 EP1968749 B1 EP 1968749B1 EP 06841363 A EP06841363 A EP 06841363A EP 1968749 B1 EP1968749 B1 EP 1968749B1
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EP
European Patent Office
Prior art keywords
screw
blade
type solid
bowl centrifuge
main
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
EP06841363.2A
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German (de)
English (en)
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EP1968749A1 (fr
Inventor
Steffen Hruschka
Roger HÜLSMANN
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 EP1968749A1 publication Critical patent/EP1968749A1/fr
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Active legal-status Critical Current
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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
    • B04B2001/2033—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 feed accelerator inside the conveying screw
    • 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
    • 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
    • B04B2001/205—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 special construction of screw thread, e.g. segments, height
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S494/00—Imperforate bowl: centrifugal separators
    • Y10S494/901—Imperforate bowl: centrifugal separators involving mixture containing oil

Definitions

  • the invention relates to a solid bowl screw centrifuge according to the preamble of claim 1.
  • Decanter screws are known from the prior art, in which recesses are provided in the screw blade, such as from DE 41 32 693 A1 , In addition, it is also known to form leaf-segment-like flights, such as from WO 97/23295 , However, these blade segments may extend far into the conical section, which is unfavorable. Furthermore, they are distributed on the circumference of the screw body in its entire area, which has also proved to be less advantageous. In addition, not about additional leaf segments are placed in the conveyor track between the flights, but the blade segments themselves form the screw threads. With the two solutions mentioned above, therefore, can still achieve sufficient profitability of olive oil production.
  • a method, which has proven particularly useful in olive oil production, is from the EP 0 557 758 known.
  • a two-phase separation is carried out in which the oil is separated directly from a solid / water mixture.
  • a gentle inlet of the product is realized via at least one flight away. It is the blade segments in a first flight that is closer to a tapered portion than the other flights are aligned with the blade segments, rotated forward relative to the main scroll, and the other blade segments in the next scroll axially adjacent to the tapered portion are preferably trained or aligned parallel to the main worm blade.
  • the blade segments are arranged in the conveying path, wherein a part of the blade segments in a first of the two screw threads, which is closer in the direction of a tapered portion than the other of the two flights, relative to the main screw blade is rotated forward and wherein a further part of the blade segments is preferably formed parallel to the main worm blade in the axially adjacent next to the tapered section away next worm gear.
  • an auxiliary screw blade in the flight is arranged, which preferably extends over the entire tapered portion of the screw.
  • the power can be increased by about 20% (eg 6t / h instead of 5t / h).
  • the oil yield is increased by about 10%.
  • the solids phase can be adjusted, for example, to a residual moisture content of about 40% to 55%. It is thus possible to meet the essential requirements for a residual moisture content - also depending on the respective regulations to be observed.
  • With the screw according to the invention can be in a preferred embodiment probably improve the two- as well as the three-phase oil recovery, which is occasionally still used.
  • the oil is separated as the liquid phase in a three-phase separation section of a second phase - essentially of water - and a third - essentially solids.
  • the efficiency of various centrifugal separation processes in a three-phase separation can be surprisingly significantly increased again compared to the prior art, as an acceleration of the solid both in the circumferential direction This also results in a better phase separation of the viscoelastic and compressible paste.
  • the incoming paste is compacted in the rotor immediately after it has flowed on to the solid.
  • the screw can also be easily retrofitted to existing centrifuges.
  • the worm according to the invention is particularly suitable for use in a process for obtaining oil from fruits and seeds and for better dewatering and / or de-oiling of organic material pulp (for example seed pudding, pulp mash, animal tissues such as fish, egg, adipose tissue cells). It is also prevented that the incoming paste compacts immediately after flowing on impact with the solid in the rotor.
  • organic material pulp for example seed pudding, pulp mash, animal tissues such as fish, egg, adipose tissue cells.
  • the screw is also suitable for dewatering other compressible sludge. Also conceivable is an application in winemaking.
  • the recesses in the screw blades are formed to protrude radially at least into the region of the solid zone (e.g., 70-95%, preferably 70-100% of the screw blade height).
  • the height of the leaf segments is about 0 - 30% lower than the Schneckenblatt cramp.
  • the blade segments are formed as rectangular plates. Also conceivable are trapezoidal, rounded and / or tapered or widening outwardly from the screw body elements.
  • Fig. 1 shows a screw 1 for a solid bowl screw centrifuge - ie a decanter screw - which has a screw body 3 and here a worm body 3 multiple surrounding main screw blade 5, which forms a plurality of flights X1, X2, X3, ... Xn.
  • the main screw blade is inclined at an acute angle to the surface of the screw body in the direction of the tapered end of the screw, ie in the conveying direction for the solid to be discharged. It thus has an angle ⁇ to the screw axis A or to the screw body in the conical region (see below), which is preferably smaller than 90 °.
  • the helical pitch is denoted by ⁇ .
  • a “helical flight” is a helical turn (360 °) of a catchy helix. According to the terminology of this application, they are counted from the liquid discharge and designated X1, X2, X3, ..., Xn.
  • the worm threads X1,... Form a main conveying track 7 for conveying / transporting a material to be processed.
  • the drum 35 with the envelope 23 has in the in Fig. 1 rear portion of a cylindrical section 9 and in his in Fig. 1 follow it front portion on a conically tapering portion 11.
  • the worm blade tapers so that the surrounding envelope curve 23 whose contour corresponds almost to the surrounding drum contour of the only indicated drum 35, tapers from an axial region 13 conically to the region of a solids discharge (not shown here).
  • the worm body 3 tapers for solids discharge also the worm body 3 tapers.
  • a stowage device which closes or blocks the one or both screw flights up to a predetermined radius.
  • two weir-like barbs 34 (of which in Fig. 2 only one can be seen) arranged transversely to the actual screw blades in the two screw flights, which is structurally particularly easy to implement.
  • the decanter can thus by simple conversion, e.g. depending on the nature of the harvested olives used for a two- or a three-phase separation.
  • the first distributor is closer to the cylindrical (in Fig. 1 and 2 right) end of the drum - so to the liquid discharge (not visible here) - out.
  • the second manifold is formed to extend beyond the region 13 that defines the boundary between the conical and cylindrical portions 9 and 11 of the screw 1.
  • this distributor is used with its inlet openings 17 in the centrifugal space or in the drum interior as an inlet for introducing the centrifuged material into the drum.
  • This inlet is particularly suitable for a two-phase operation in which the oil is separated from a mixed phase of the water and the solids.
  • this distributor is used with its inlet openings 19 as an inlet.
  • This inlet is particularly suitable for a three-phase operation in which the oil is separated from a water phase and a solid phase.
  • a second auxiliary worm blade 21 is provided over a limited axial region, which is greater than or at least equal to the axial length a of its inlet openings 17, that viewed from the worm body 3 has a smaller radial extent R2 towards the outside outwardly as the first screw blade 5 with the extension R1.
  • auxiliary worm blade 21 has at least the radial height of the lighter oil phase collecting during operation. Water and solids continue to accumulate outside.
  • the auxiliary worm blade 21 divides from the main worm gear quasi a partial passage 25, which is narrower here than the remaining main track 7.
  • the inlet openings 17 for the two-phase separation are open only in the main path, in the area of the auxiliary track 25, they are closed.
  • Flowing oil can in a two-phase separation such axial region in which the first inlet openings 17 are on the - relative to the conical region - back of the coil - pass without the product flowing into the main web product its flow in the direction of diesstechniksaustragsötechnisch (here right located)).
  • the product - olive porridge - can flow into the remaining area of the main line.
  • the main worm blade has recesses 31 extending inwardly from the outer periphery of the main worm blade, leaving a butt portion of the main worm blade on the worm body.
  • leaf segments 27, 29, which are not fully revolving, are each arranged in the screw flights in a few, preferably only two passages, which preferably have a smaller radial extension than the main screw blade.
  • the centrifuged material should flow in the three-phase separation.
  • the blade segments 27, 29 are located between the recesses 31, that they prevent the formation of an axial flow in this area.
  • the first blade segments 27, 29 in the closer to the tapered portion 11 of the drum - especially just before the transition to the conical region - lying screw X6 are aligned in the direction of the tapered portion 11 forward (the angle gamma to the axis of rotation is greater than in the other leaf segments 29); please refer Fig. 2 ).
  • the conical region 11 of the drum begins with the double screw in the direction of the solids discharge.
  • the centrifuged material guided into the centrifugal space is accelerated to the operating speed.
  • the solid particles settle in a very short time on the drum wall.
  • the screw 1 rotates at a slightly lower or greater speed than the drum and promotes the ejected solid to the conical portion 11 out of the drum.
  • the liquid flows in one phase (two-phase separation) or in two phases (three-phase separation) to the larger drum diameter at the rear end of the drum, where it is possibly derived at different radii.

Landscapes

  • Centrifugal Separators (AREA)

Claims (16)

  1. Centrifugeuse à vis sans fin à bol plein, qui présente :
    - un tambour tournant (35) possédant une zone conique et une zone cylindrique (9, 11),
    - une vis sans fin également tournante possédant un corps de vis sans fin,
    - au moins une lame hélicoïdale principale (5) entourant plusieurs fois le corps de vis sans fin (3), qui forme plusieurs filets hélicoïdaux (X1, X2, X..., ...),
    - dans laquelle les filets hélicoïdaux (X1, X2, ...) forment une voie de transport (7) pour le transport d'un produit à centrifuger à traiter,
    - dans laquelle, dans la voie de transport (7), des segments de lame supplémentaires (27, 29) sont disposés dans certaines zones dans les filets hélicoïdaux,
    - et dans laquelle la lame hélicoïdale (5) est pourvue dans la zone des segments de lame hélicoïdale (27, 29) d'évidements (31) qui sont formés de telle sorte qu'ils permettent un passage du produit à centrifuger (S) entre des filets hélicoïdaux adjacents (X, X+1, ...),
    caractérisée en ce que
    - les segments de lame (27, 29) sont disposés dans la voie de transport (7) seulement dans peu, de préférence seulement dans deux filets hélicoïdaux (X5, X6),
    - une partie des segments de lame (27) dans un premier filet hélicoïdal (X6), qui est plus proche en direction d'une partie conique (11) que le(s) autre(s) filet(s) hélicoïdal/hélicoïdaux (X5) avec les segments de lame, étant orientée tournée vers l'avant par rapport à la lame hélicoïdale principale (5) et
    - une autre partie des segments de lame (29) dans le filet hélicoïdal suivant se raccordant directement plus loin axialement de la partie conique étant de préférence réalisée parallèle à la lame hélicoïdale principale (5).
  2. Centrifugeuse à vis sans fin à bol plein selon l'une des revendications précédentes, caractérisée en ce que les segments de lame (27, 29) sont disposés dans la voie de transport (7) seulement dans deux filets hélicoïdaux (X5, X6), au moins une partie des segments de lame (27) dans un premier des deux filets hélicoïdaux (X6), qui est plus proche en direction d'une partie conique (11), étant orientée tournée vers l'avant par rapport à la lame hélicoïdale principale (5) et une autre partie des segments de lame (29) dans le filet hélicoïdal suivant (X5) se raccordant directement plus loin axialement de la partie conique (11) étant réalisée parallèle à la lame hélicoïdale principale (5).
  3. Centrifugeuse à vis sans fin à bol plein selon l'une des revendications précédentes, caractérisée en ce qu'une lame hélicoïdale auxiliaire (33) est disposée dans le filet hélicoïdal (7) dans la zone conique (11) de la vis sans fin (1).
  4. Centrifugeuse à vis sans fin à bol plein selon la revendication 3, caractérisée en ce que la lame hélicoïdale auxiliaire (33) s'étend sur toute la zone conique (11) de la vis sans fin (1).
  5. Centrifugeuse à vis sans fin à bol plein selon l'une des revendications précédentes, caractérisée en ce que les segments de lame (29) sont orientés parallèlement à la lame hélicoïdale principale (5) dans le filet hélicoïdal (X5) situé plus près de la décharge de liquide.
  6. Centrifugeuse à vis sans fin à bol plein selon l'une des revendications précédentes, caractérisée en ce que les évidements (31) s'étendent vers l'intérieur à la manière de fenêtres depuis la circonférence extérieure de la lame hélicoïdale principale, une zone de moignon de la lame hélicoïdale principale (5) restant sur le corps de vis sans fin (3).
  7. Centrifugeuse à vis sans fin à bol plein selon l'une des revendications précédentes, caractérisée en ce que les segments de lame (27, 29) sont réalisés moins hauts radialement que le reste de la lame hélicoïdale principale (5).
  8. Centrifugeuse à vis sans fin à bol plein selon l'une des revendications précédentes, caractérisée en ce que les évidements (31) s'étendent seulement sur deux filets hélicoïdaux.
  9. Centrifugeuse à vis sans fin à bol plein selon l'une des revendications précédentes, caractérisée en ce qu'un dispositif de barrage est disposé dans le filet hélicoïdal dans la zone de transition entre la partie cylindrique (9) et la partie conique (11).
  10. Centrifugeuse à vis sans fin à bol plein selon la revendication 9, caractérisée en ce que le dispositif de barrage dans le filet hélicoïdal est formé d'une ou plusieurs tôle(s) de barrage (34) qui ferme(nt) le filet hélicoïdal jusqu'à un rayon prédéfini transversalement à la lame hélicoïdale.
  11. Centrifugeuse à vis sans fin à bol plein mit vis sans fin selon l'une des revendications précédentes, caractérisée en ce que
    - deux répartiteurs décalés axialement l'un par rapport à l'autre dans la direction de l'axe de vis sans fin A, pourvus de premières et deuxièmes ouvertures d'entrée (17, 19), sont formés sur le corps de vis sans fin (3),
    - la vis sans fin (1) présente un tube d'entrée échangeable (15) et
    - les premières et deuxièmes ouvertures d'entrée (17, 19) sont utilisables pour une séparation di- et triphasique en fonction de la longueur axiale du tube d'entrée échangeable (15).
  12. Centrifugeuse à vis sans fin à bol plein selon l'une des revendications précédentes, caractérisée en ce qu'une deuxième lame hélicoïdale auxiliaire (21) est formée dans la voie de transport dans la zone du premier répartiteur (17), sur une zone axiale limitée qui est supérieure ou au moins égale à la longueur axiale de ses ouvertures d'entrée (17).
  13. Centrifugeuse à vis sans fin à bol plein selon la revendication 12, caractérisée en ce que la deuxième lame hélicoïdale auxiliaire (21) présente une extension radiale plus petite que la première lame hélicoïdale (5).
  14. Centrifugeuse à vis sans fin à bol plein selon l'une des revendications précédentes 12 ou 13, caractérisée en ce que la deuxième lame hélicoïdale auxiliaire (21) présente au moins la hauteur radiale de la phase huileuse plus légère qui s'accumule à l'intérieur en fonctionnement.
  15. Centrifugeuse à vis sans fin à bol plein selon l'une des revendications précédentes 3 à 14, caractérisée en ce que la lame hélicoïdale auxiliaire (21) sépare de la voie de transport une voie auxiliaire (25) qui est de préférence plus étroite que la voie principale restante et qui se situe - par rapport à la partie conique - sur le côté arrière de la lame hélicoïdale principale.
  16. Centrifugeuse à vis sans fin à bol plein selon l'une des revendications précédentes, caractérisée en ce que les ouvertures d'entrée (17) du premier répartiteur (17) pour la séparation diphasique sont conçues ouvertes seulement dans la voie principale, par contre fermées dans la zone de la voie auxiliaire (25).
EP06841363.2A 2005-12-22 2006-12-14 Centrifugeuse a vis sans fin a bol plein Active EP1968749B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005061461A DE102005061461A1 (de) 2005-12-22 2005-12-22 Vollmantel-Schneckenzentrifuge
PCT/EP2006/069718 WO2007074076A1 (fr) 2005-12-22 2006-12-14 Centrifugeuse a vis sans fin a bol plein

Publications (2)

Publication Number Publication Date
EP1968749A1 EP1968749A1 (fr) 2008-09-17
EP1968749B1 true EP1968749B1 (fr) 2018-06-06

Family

ID=37758597

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06841363.2A Active EP1968749B1 (fr) 2005-12-22 2006-12-14 Centrifugeuse a vis sans fin a bol plein

Country Status (9)

Country Link
US (1) US7549957B2 (fr)
EP (1) EP1968749B1 (fr)
AR (1) AR058115A1 (fr)
AU (1) AU2006331435C1 (fr)
CL (1) CL2006003689A1 (fr)
DE (1) DE102005061461A1 (fr)
ES (1) ES2686314T3 (fr)
PT (1) PT1968749T (fr)
WO (1) WO2007074076A1 (fr)

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DE102005061461A1 (de) * 2005-12-22 2007-07-05 Westfalia Separator Ag Vollmantel-Schneckenzentrifuge
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PT2586533T (pt) * 2011-10-28 2019-11-21 Flottweg Se Centrífuga de parafuso contínuo de parede sólida com um parafuso contínuo
DK177710B1 (en) 2012-09-14 2014-03-31 Alfa Laval Corp Ab Auger conveyor for a centrifugal separator, in particular a decanter centrifuge, and a centrifugal separator
CN108126834B (zh) * 2017-12-25 2023-12-22 大连理工大学 一种脱水、除油及排渣三相卧式螺旋沉降离心机
CN108067358B (zh) * 2017-12-25 2023-12-22 大连理工大学 一种油水砂分离三相卧式螺旋离心机
DE102020129478A1 (de) 2020-11-09 2022-06-02 Flottweg Se Schneckennabe, Zentrifugenschnecke und Vollmantelschneckenzentrifuge
CN112191372A (zh) * 2020-09-24 2021-01-08 兰州石化职业技术学院 一种餐厨垃圾处理装置
CN112827665B (zh) * 2021-01-21 2024-11-22 江苏巨能机械有限公司 带副叶片的螺旋输送器与螺旋卸料沉降离心机
CN113927939B (zh) * 2021-11-03 2024-01-30 浙江国丰油脂有限公司 一种智能压榨食用油的设备
DE202022101838U1 (de) 2022-04-06 2023-07-10 Gea Westfalia Separator Group Gmbh Vollmantel-Schneckenzentrifuge

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Also Published As

Publication number Publication date
PT1968749T (pt) 2018-10-10
US20080312060A1 (en) 2008-12-18
AR058115A1 (es) 2008-01-23
AU2006331435C1 (en) 2012-09-13
AU2006331435A1 (en) 2007-07-05
EP1968749A1 (fr) 2008-09-17
CL2006003689A1 (es) 2008-04-04
ES2686314T3 (es) 2018-10-17
AU2006331435B2 (en) 2011-04-14
WO2007074076A1 (fr) 2007-07-05
US7549957B2 (en) 2009-06-23
DE102005061461A1 (de) 2007-07-05

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