EP1968749A1 - Centrifugeuse a vis sans fin a bol plein - Google Patents

Centrifugeuse a vis sans fin a bol plein

Info

Publication number
EP1968749A1
EP1968749A1 EP06841363A EP06841363A EP1968749A1 EP 1968749 A1 EP1968749 A1 EP 1968749A1 EP 06841363 A EP06841363 A EP 06841363A EP 06841363 A EP06841363 A EP 06841363A EP 1968749 A1 EP1968749 A1 EP 1968749A1
Authority
EP
European Patent Office
Prior art keywords
screw
blade
solid bowl
main
segments
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
EP06841363A
Other languages
German (de)
English (en)
Other versions
EP1968749B1 (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
Original Assignee
Westfalia Separator 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 Westfalia Separator GmbH filed Critical Westfalia Separator GmbH
Publication of EP1968749A1 publication Critical patent/EP1968749A1/fr
Application granted granted Critical
Publication of EP1968749B1 publication Critical patent/EP1968749B1/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
    • B04B2001/2033—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 in the prior art in which recesses are provided in the screw blade, e.g. from DE 41 32 693 Al.
  • blade segment-like screw flights for example from WO 97/23295.
  • These leaf segments may extend. but far into the conical section, which is unfavorable.
  • they are distributed on the circumference of the screw body in its entire area, which has also proved to be less advantageous.
  • additional sheet segments are not placed in the conveying path between the screw flights, but the blade segments themselves form the screw flights.
  • a process which has proven particularly useful in olive oil production is known from EP 0 557 758.
  • 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 with the blade segments oriented forward relative to the main scroll, and the other blade segments in the next scroll immediately adjacent the taper are preferably formed 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 screw is arranged, which preferably extends over the entire tapered portion of the screw.
  • a sibling invention which further develops the subject matter of claim 1, but is also to be considered independently, is specified in claim 9.
  • the power can be increased by about 20% (e.g., 6t / h instead of 5t / h).
  • the oil yield is increased by about 10%.
  • the solid phase can be e.g. 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 particular mood to be met.
  • 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, since an acceleration of the solid both in the circumferential direction This 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 screw 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. 2 shows a part of a development representation of the screw from Fig.1.
  • the main worm blade is inclined at an acute angle to the surface of the worm body towards the tapered end of the worm, i. 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 above), which is preferably smaller than 90 °.
  • the spiral pitch is designated by ß.
  • a “helical flight” is understood to mean a helical flight (360 °) of a catchy helix According to the terminology of this application, it is counted starting from the fluid discharge and denoted by Xl, 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 curve 23 has a cylindrical section 9 in the rear area in FIG. 1 and in its rear section in FIG. 1 front portion on a conically tapering portion 11.
  • the worm blade tapers so that the surrounding envelope curve 23, the contour of which almost corresponds to the surrounding drum contour of the only indicated drum 35, tapers from an axial region 13 conically towards the area of a solids output (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.
  • baffles 34 (of which in Fig. 2 only one can be seen) in the two screw flights arranged transversely to the actual screw blades, which is structurally particularly easy to implement.
  • the screw 1 shown in Fig. 2 has the peculiarity that it is suitable depending on the axial length of the exchangeable inlet pipe 15 for a two- and a three-phase separation.
  • 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.
  • two distributors with first and second inlet openings 17, 19 offset axially relative to one another in the direction of the worm axis A are formed.
  • the first distributor is closer to the cylindrical (in Fig. 1 and 2 right) end of the drum - so 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 than the first screw blade 5 with the extension Rl.
  • 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 essentially divides a partial passage 25 from the main worm gear, which is narrower here than the remaining main track 7.
  • the inlet openings 17 for the two-phase separation are opened only into the main track, and 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 Einlaufofmieux 17, 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 inlet pipe 15 is exchanged for one that extends up to the second inlet openings 19.
  • 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); see Fig. 2).
  • the conical region 11 of the drum (or the envelope curve of the screw) with the double screw begins directly 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 and is there possibly derived at different radii.

Landscapes

  • Centrifugal Separators (AREA)

Abstract

L'invention concerne une centrifugeuse à vis sans fin à bol plein comprenant: un corps fileté (3); au moins une ailette hélicoïdale principale (5) qui entoure plusieurs fois le corps fileté (3) et forme plusieurs pas de vis (X1, X2, X...,...). Des segments d'ailette (27, 29) supplémentaires sont placés dans certaines sections de la voie de transport (7) tandis que l'ailette hélicoïdale (5) est pourvue, au niveau des segments d'ailette hélicoïdale (27, 29), d'évidements (31) qui sont réalisés de manière à permettre un écoulement du produit centrifugé (S) entre des pas de vis (X, X+1,...) adjacents. Dans la voie de transport (7), les segments d'ailette (27, 29) sont placés seulement dans deux pas de vis (X5, X6). Certains segments d'ailette (27) dans un premier pas de vis (X6) sont orientés de manière à faire face à l'avant, tandis que d'autres segments d'ailette (29) dans le pas de vis suivant, situé dans le prolongement axial direct, est parallèle à l'ailette hélicoïdale (5).
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 true EP1968749A1 (fr) 2008-09-17
EP1968749B1 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)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005061461A1 (de) * 2005-12-22 2007-07-05 Westfalia Separator Ag Vollmantel-Schneckenzentrifuge
DK200970028A (en) * 2009-06-12 2010-12-13 Alfa Laval Corp Ab A decanter centrifuge and a screw conveyor
KR101010056B1 (ko) 2009-07-08 2011-01-21 박정숙 3상원심분리기
DE102010027598A1 (de) 2010-07-20 2012-01-26 Gea Mechanical Equipment Gmbh Verfahren zur Klärung eines Wein-Gelägers
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
CN103143453B (zh) * 2010-12-30 2015-11-18 中国石油天然气股份有限公司 一种三相卧螺离心机
EP2586533B1 (fr) * 2011-10-28 2019-08-14 Flottweg SE Centrifugeuse à vis a bol plein dotée d'une vis sans fin
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
CN112827665A (zh) * 2021-01-21 2021-05-25 巨能机械(中国)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

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JPS6182855A (ja) 1984-02-14 1986-04-26 Ishikawajima Harima Heavy Ind Co Ltd スクリユ−デカンタ型遠心分離機
US4731182A (en) * 1985-11-18 1988-03-15 Decanter Pty. Limited Decanter centrifuge
JP2540198B2 (ja) * 1988-12-08 1996-10-02 アルファーラバル エービー デカンタ型遠心分離機を用いる汚泥の脱水方法および装置
DE4132693A1 (de) 1991-10-01 1993-04-08 Messer Griesheim Gmbh Verfahren und vorrichtung zur herstellung von pulvern
DE4206006C1 (fr) 1992-02-27 1993-09-16 Westfalia Separator Ag, 59302 Oelde, De
IT1255667B (it) * 1992-06-11 1995-11-09 Centrifuga estrattrice per l'estrazione di olio da impasti oleosi provenienti dalla lavorazione delle drupe dell'olivo e di altri fruttioleosi, operante senza aggiunta di acqua potabile.
US5653673A (en) * 1994-06-27 1997-08-05 Amoco Corporation Wash conduit configuration in a centrifuge apparatus and uses thereof
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DK143295A (da) * 1995-12-18 1997-06-19 Tetra Laval Holdings & Finance Dekantercentrifuge
SE505557C2 (sv) 1995-12-21 1997-09-15 Alfa Laval Separation Ab Dekantercentrifug
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SE525413C2 (sv) * 2003-06-18 2005-02-15 Alfa Laval Corp Ab En skruvtransportör för en dekantercentrifug
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Also Published As

Publication number Publication date
AU2006331435A1 (en) 2007-07-05
DE102005061461A1 (de) 2007-07-05
AU2006331435C1 (en) 2012-09-13
PT1968749T (pt) 2018-10-10
ES2686314T3 (es) 2018-10-17
EP1968749B1 (fr) 2018-06-06
AU2006331435B2 (en) 2011-04-14
US20080312060A1 (en) 2008-12-18
CL2006003689A1 (es) 2008-04-04
WO2007074076A1 (fr) 2007-07-05
US7549957B2 (en) 2009-06-23
AR058115A1 (es) 2008-01-23

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