EP0574364B1 - Ohne Zugabe von Trinkwasser arbeitende Zentrifuge zum Abscheiden von Öl aus Ölschlämmen - Google Patents

Ohne Zugabe von Trinkwasser arbeitende Zentrifuge zum Abscheiden von Öl aus Ölschlämmen Download PDF

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Publication number
EP0574364B1
EP0574364B1 EP93830235A EP93830235A EP0574364B1 EP 0574364 B1 EP0574364 B1 EP 0574364B1 EP 93830235 A EP93830235 A EP 93830235A EP 93830235 A EP93830235 A EP 93830235A EP 0574364 B1 EP0574364 B1 EP 0574364B1
Authority
EP
European Patent Office
Prior art keywords
drum
oil
nozzles
water
diaphragm
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.)
Expired - Lifetime
Application number
EP93830235A
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English (en)
French (fr)
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EP0574364A1 (de
Inventor
Ezio Rapanelli
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.)
RAPANELLI FIORAVANTE SpA
Original Assignee
RAPANELLI FIORAVANTE SpA
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Publication date
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Publication of EP0574364A1 publication Critical patent/EP0574364A1/de
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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
    • B04B2001/2041—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
    • B04B2001/2083—Configuration of liquid outlets

Definitions

  • the present invention relates to a horizontal centrifuge or "Decanter”, for oil extraction from an oily slurry obtained from the drupes of the olive-tree or possibly from other oily products, and in particular it relates to such a type of centrifugal separator in which it is not necessary to add drinkable water to the slurry.
  • centrifuges also known as "Decanters” essentially comprise the following elements: a drum with two or more sectors and with a cylindrical or conical end; a rotating helicoid screw located within the drum for conveying solids towards the outlet, the latter being provided on the end portion of the cylindrical or comical end; an inlet head with nozzles providing a way out to liquids, i.e. oil and water; a closure head with nozzles providing a way out to wet solids, located at the end portion of the cylindrical or comical end; an inlet tube for the oily slurry from which oil is to be extracted; mechanical devices for starting and controlling the independent rotary motion both of the drum and the helicoid screw.
  • a second generation of centrifugal separators included three nozzle systems in order to obtain a higher efficiency, one of which provided the way out for oil, the second one served to remove the water contained in the slurry and the last one was used for providing the way out for wet solids.
  • the applicantion EP-A-0 488 086 discloses a decanter which is used for dewatering a slurry.
  • This decanter comprises diaphragms which increase in diameter size towards the discharge port of the decanter. This allows a consolidation of the slurry which is dewatered step by step All diaphragms include overflow holes to enable the passage of water to the preceding centrifugation stage.
  • JP-A-59 169 551 discloses a decanter centrifuge provided with a weir plate fixed to the drum and located near the solid discharge nozzles.
  • the object of the present invention is to find a remedy for the above mentioned disadvantages, by providing a horizontal centrifugal separator capable of working with a greater efficiency as compared to the conventional centrifugal separators, and which doesn't need drinkable water addition.
  • the separation of oil from the solid remainders is best obtained by using only the water contained in the drupes or oily fruits, and this water is conveyed to the outside together with the solid remainders, without producing considerable amounts of polluting substances.
  • reference number 1 indicates the external body or drum of the conventional centrifuge, comprising a cylindrical part 1a and a conical end 1b.
  • a helicoid screw is mounted in the inside of the external body 1, which is formed by helicoidal coils 2 and a hollow body 2a, which is provided with a plurality of substantially rectangular apertures.
  • These rectangular apertures are located at regular intervals on the surface of the hollow body 2a, and they form different sets 8a, 8b, 8c and 8d of apertures, the sets being spaced apart by an angle of 90°.
  • the row or set 8d of apertures is not shown in Fig. 1, since it is arranged on the opposite side of the helicoid screw with respect to the set of apertures 8a.
  • the centrifugal separator of Fig. 1 is further provided with two closure heads 14, 15, the first one 14 being located on the left end (in Fig. 1) of external body 1, and the second one 15, on the right end of the same.
  • the centrifugal separator is filled with the oily slurry obtained by the processing of olive tree drupes or other oily products, through the feeding duct 9 which ends into the inlet tube 3.
  • the inlet tube 3 extends inside the hollow body 2a by more than one half of its length and the oily slurry reaches the region bounded by the surface of the hollow body 2a and by the inner part of the drum 1, by passing through the apertures 8a, 8b, 8c, 8d.
  • This type of conventional centrifuge is provided with oil exit nozzles 4a, 4b, 4c (Figs. 1 and 2) and with water exit nozzles 5a, 5b, 5c, the direction of the oil and water flow being shown by the arrows a, b, c and a' , b' , c' respectively.
  • the nozzles 4a,b,c and 5a,b,c are provided on the closure head 14, whereas the closure head 15 has nozzles 6 for the removal of solid remainders.
  • the centrifugal separator also comprises a motor reducer 7 for effecting an independent rotation of the external body 1 and the helicoid screw 2, 2a.
  • Fig. 3 shows the horizontal centrifuge of the present invention. It is provided with an inlet tube 3, having a very short length, since it terminates at the left end of the hollow body 2a (with reference to the figure). This feature is also disclosed in EP-A-0140672.
  • the water exit nozzles 5 are not provided, but only those nozzles 4 are present, which serve for the discharge of the oil to the outside, as can be seen also from Fig. 4.
  • the helicoid screw comprises two or more diaphragms. These diaphragms, indicated in the figures by reference numbers 11 and 12, have different dimensions, wherein, in particular, diaphragm 12 has a smaller diameter than diaphram 11.
  • the diaphragm 11 is provided with central passages 16.
  • Another diaphragm 13 is integral with the drum 1 and is located near the nozzles providing the way out for the olive husk and the water contained in the drupes.
  • the horizontal centrifugal separator also comprises an epicyclic motor reducer 7 which performs the speed differentiation between the drum and the helicoid screw.
  • the means provided by the present invention that is the diaphragms 11, 12 in which 12 has a diameter smaller than 11, in combination with diaphragm 13 and a shorter inlet tube 3 allow to carry out an excellent separation of the oil (which is discharged through the nozzles 4) from the solid remainders and from the water originally contained in the drupes (which are both discharged through the nozzles 6), without any addition of drinkable water; the centrifuge is also more efficient because, no drinkable water being added, the overall volume of material introduced in its inside is much less.
  • adjustable nozzles 4 for discharging oil to the outside, and they are separated from each other by an angle of 120° (Fig. 4), but obviously their number could also be different, or they could be arranged in a different fashion.

Landscapes

  • Centrifugal Separators (AREA)
  • Water Treatment By Sorption (AREA)
  • Fats And Perfumes (AREA)
  • Extraction Or Liquid Replacement (AREA)

Claims (1)

  1. Horizontale Zentrifuge zum Abscheiden von Öl aus Ölschlämmen, bestehend aus einer Trommel (1) mit einem konischen und einem zylindrischen Teil und zwei Verschlussköpfen (14, 15), einem Zufuhrrohr (3) für den Ölschlamm, der sich durch den ersten (14) der beiden Verschlussköpfe erstreckt und nahe dem ersten Verschlusskopf (14) innerhalb eines Hohlkörpers (2a) mündet, welcher zusammen mit den schraubenförmigen Windungen (2) die Zentrifugenschnecke bildet, einer Reihe von Durchbrüchen (8a, 8b, 8c, 8d) längs des Hohlkörpers (2a), Düsen (6) zur Wasser- und Festkörperentnahme, und mechanischen Mitteln, die eine unabhängige Rotation der Trommel (1) und der Schnecke (2, 2a) erlauben, dadurch gekennzeichnet, dass es umfasst: verstellbare Dürsen (4) für den Ölabfluss, eine Blende bzw. Trennscheibe (13), die fest mit der Trommel (1) verbunden ist und nahe der Düsen (6) für den Wasser- und Festkörperabfluss angeordnet ist, wobei letztere Düsen ihrerseits an den zweiten Verschlusskopf (15) angebracht sind, zwei weitere Blenden bzw. Trennscheiben (11, 12), die mit dem Hohlkörper (2a) fest verbunden sind, von denen die erste (11) zentrale Durchgänge (16) und eine grössere Ausdehnung als die zweite (12) aufweist, wobei die genannte erste Blende (11) in der Übergangszone liegt, wo die Form der Trommel (1) von der zylindrischen in die kegelstumpfartige Form übergeht, während die zweite Trennscheibe bzw. Blende (12) zwischen der ersten Trennscheibe (11) und der mit der Trommel (1) fest verbundenen Trennscheibe (13) liegt.
EP93830235A 1992-06-11 1993-05-27 Ohne Zugabe von Trinkwasser arbeitende Zentrifuge zum Abscheiden von Öl aus Ölschlämmen Expired - Lifetime EP0574364B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRM920439A IT1255667B (it) 1992-06-11 1992-06-11 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.
ITRM920439 1992-06-11

Publications (2)

Publication Number Publication Date
EP0574364A1 EP0574364A1 (de) 1993-12-15
EP0574364B1 true EP0574364B1 (de) 1997-01-22

Family

ID=11401054

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93830235A Expired - Lifetime EP0574364B1 (de) 1992-06-11 1993-05-27 Ohne Zugabe von Trinkwasser arbeitende Zentrifuge zum Abscheiden von Öl aus Ölschlämmen

Country Status (5)

Country Link
EP (1) EP0574364B1 (de)
AT (1) ATE148008T1 (de)
DE (1) DE69307604T2 (de)
ES (1) ES2098714T4 (de)
IT (1) IT1255667B (de)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69704963T2 (de) * 1996-01-18 2002-01-24 Rapanelli Fioravante Spa Horizontale Zentrifuge für eine optimale Ölextraktion
IT1285052B1 (it) * 1996-10-18 1998-06-03 Gennaretti S P A Centrifuga orizzontale per l'estrazione di olio da un impasto oleoso
KR100398168B1 (ko) * 2000-10-10 2003-09-19 임광석 산업용 원심분리기
IT1316021B1 (it) * 2000-12-13 2003-03-26 Rapanelli Fioravante Spa Coclea che non produce rimescolamento di liquidi, utilizzabile in unacentrifuga orizzontale per l'estrazione di olio da un impasto oleoso.
DE102005061461A1 (de) * 2005-12-22 2007-07-05 Westfalia Separator Ag Vollmantel-Schneckenzentrifuge
DK200800555A (en) 2008-04-16 2009-10-17 Alfa Laval Corp Ab Centrifugal separator
DK201070482A (en) 2010-11-12 2012-05-13 Alfa Laval Corp Ab A centrifugal separator
US8677894B2 (en) * 2011-08-01 2014-03-25 Olive X-Press Ltd. Device for preparing olive paste for oil extraction
KR101224309B1 (ko) * 2012-10-25 2013-01-21 김은수 슬러지 원심 분리 장치
CN103008119A (zh) * 2012-12-03 2013-04-03 常州大学 一种用于果胶分离的卧式离心设备
CN106475234B (zh) * 2015-08-26 2018-10-26 苏州瑞威离心分离技术有限公司 卧式螺旋卸料沉降离心机
CN105170342A (zh) * 2015-09-06 2015-12-23 广州金康源环保设备有限公司 一种卧螺离心机
DE102017215244A1 (de) * 2017-08-31 2019-02-28 Südzucker AG Verfahren zur Reduktion des Zuckerverlustes bei der Abtrennung eines Koagulats aus Vorkalkungssaft und zur Eindickung des Koagulats
CN109731700A (zh) * 2019-01-29 2019-05-10 山东理工大学 一种带有预锁定安全机关的卧式离心机
WO2021122890A1 (de) * 2019-12-19 2021-06-24 Flottweg Se Schneckennabe, zentrifugenschnecke und vollmantelschneckenzentrifuge

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1388992A (fr) * 1964-01-03 1965-02-12 Procédé d'extraction de l'huile contenue dans une pâte d'olives broyées et extracteur centrifuge perfectionné servant à la mise en oeuvre de ce procédé
DE1918130C3 (de) * 1968-04-18 1980-06-12 Mario De Dr.-Ing. Genua Martini (Italien) Vollmantel-Schneckenzentrifuge
FR2054722A5 (en) * 1969-07-24 1971-05-07 Saget Pierre Centrifuge sepg two liquids and a solid
GB8328894D0 (en) * 1983-10-28 1983-11-30 Broadbent & Sons Ltd Thomas Decanting type centrifuges
US5156751A (en) * 1991-03-29 1992-10-20 Miller Neal J Three stage centrifuge and method for separating water and solids from petroleum products

Also Published As

Publication number Publication date
ATE148008T1 (de) 1997-02-15
DE69307604T2 (de) 1997-09-04
IT1255667B (it) 1995-11-09
ES2098714T3 (es) 1997-05-01
DE69307604D1 (de) 1997-03-06
ES2098714T4 (es) 1997-06-16
EP0574364A1 (de) 1993-12-15
ITRM920439A0 (it) 1992-06-11
ITRM920439A1 (it) 1993-12-11

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