EP0785029B1 - Horizontal centrifuge for an optimum oil extraction - Google Patents

Horizontal centrifuge for an optimum oil extraction Download PDF

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Publication number
EP0785029B1
EP0785029B1 EP19970830001 EP97830001A EP0785029B1 EP 0785029 B1 EP0785029 B1 EP 0785029B1 EP 19970830001 EP19970830001 EP 19970830001 EP 97830001 A EP97830001 A EP 97830001A EP 0785029 B1 EP0785029 B1 EP 0785029B1
Authority
EP
European Patent Office
Prior art keywords
oil
baffle plate
drum
nozzles
hollow shaft
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
EP19970830001
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0785029A1 (en
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
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
Priority claimed from IT96RM000033 external-priority patent/IT1283884B1/it
Priority claimed from IT96RM000314 external-priority patent/IT1284384B1/it
Application filed by RAPANELLI FIORAVANTE SpA filed Critical RAPANELLI FIORAVANTE SpA
Publication of EP0785029A1 publication Critical patent/EP0785029A1/en
Application granted granted Critical
Publication of EP0785029B1 publication Critical patent/EP0785029B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
    • C11B1/00—Production of fats or fatty oils from raw materials
    • C11B1/06—Production of fats or fatty oils from raw materials by pressing
    • 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 present invention relates to a horizontal centrifuge or "decanter” for oil extraction from an oily slurry obtained through the processing of olives or other oily fruits, and in particular it relates to a centrifuge in which the arrangement and/or the configuration of the baffle plates and the arrangement of the extraction nozzles, allow to realize optimum oil extraction conditions.
  • EP 0 140 672 discloses improvements in decanting type centrifuges. In particular, it discloses a method and apparatus used to remove carrier liquid from solid particles separated from a liquid slurry. As explained in the introduction of this cited document, decanter type centrifuges of both solid and screen bowl type accept an inflow of slurry consisting of a mixture of solid particles in a carrier liquid which the centrifuge separates. Normally a small quantity of the carrier liquid adheres to and contaminates the separated solids and very fine solids remain to contaminate the separated liquid (the centrate).
  • An object of the present invention is to find a solution for the above mentioned problems providing a centrifuge in which the location and the configuration of each baffle plate, the location of oil and water extraction nozzles with respect to these baffle plates, and finally the position of the oily slurry feed tube outlet with respect to both the baffle plates and oil extraction nozzles, are accurately chosen.
  • the residual oil percentage (proportion) is recovered from the olive husks using a single centrifugation process, carried out by means of a horizontal centrifuge of a special kind, which realizes the separation in two successive steps, in two corresponding separate extraction chambers of the centrifuge.
  • the horizontal centrifuge comprises a drum 3 with a cylindrical portion and a conical end; the latter could, if desired, also be cylindrical.
  • a screw (auger) conveyor 5 is integral with a central hollow shaft 14, provided with usual apertures 20 (Fig. 4) allowing the passage of the oily slurry which is fed through the feed tube 6.
  • mechanical means 17 are provided for the independent rotation of the drum 3 and the screw conveyor 5.
  • an oil column 8 is formed when the oily slurry (obtained from olives, etc.) is fed into the drum 3, due to the different specific weights of the components.
  • a baffle plate 9 has been provided, which stops the passage of oil towards the outlets for the olive husks 10. Therefore, the oil colums 8 becomes stable.
  • this oil is removed by means of the adjustable radial nozzles 15 arranged on the drum 3. Moreover, a baffle plate 2 is arranged immediately downstream of the inlet head 16. Water having a larger specific weight than oil 8 can get over this baffle plate 2, and it can be discharged through the nozzles 1 and the inlet head 16.
  • the uninterrupted oil column 8 is formed therefore between the two baffle plates 2 and 9 acting as weirs. The olive husks, which are even heavier, move more to the outside with respect to the shaft 14 of the screw conveyor, and are carried by the screw conveyor 5, towards the outlet nozzles 10.
  • a central baffle plate 7 has been applied - according to the invention - on the shaft 14 of the screw conveyor 5, between the outlet zone of the oily slurry from the feed tube 6, and the adjustable nozzles 12 for oil outlet.
  • This baffle plate 7 serves as an obstacle for the muds (mixtures of oil-water-solids) which may form inside the drum between the oil layer 8 and the water layer 4, downstream of the outlet of the feed tube 6.
  • these muds would come out together with the oil, from the nozzles 12; since they are forced to get over the baffle plate and to be directed to a more external region, the muds reach this more external region of the centrifugation space together with the olive husks, and are discharged together with the olive husks, without being able to reach the inlets of the nozzles 12, which are nearer to the shaft 14.
  • the baffle plate 9 is not located immediately downstream of the radial nozzles 12, but it is arranged so as to be shifted towards the outlets 10, so that the oil can form a long stable and uninterrupted column 8, reducing the probability that the oil gets over the baffle plate 9.
  • the baffle plate 7 has apertures 21 (Figs. 4 and 5) and has therefore no effect on the formation of the oil column 8, which settles inside the drum 3 between the baffle plate 2 and the baffle plate 9. From the continuity of the oil column 8, it follows that the oil extracted from the radial nozzles 12 and 15 has a purity degree which does not vary appreciably.
  • the advantage of the present centrifuge with respect to those which have been produced until now, is that with the arrangement of two sets of adjustable nozzles for the outlet of oil 15 and 12, which are installed in a radial position with respect to the drum 3, the first ones being disposed on the drum at equal angles near the inlet head where the slurry is fed and being separated therefrom by the baffle plate 2, the second ones being installed on the drum 3 at equal angles in the intermediate zone between the outlet of the tube 6 where the slurry comes out and the baffle plate 9, it can be ensured that the whole continuous oil column 8 which is formed due to its different specific weight with respect to water 4 and to the olive husks, can be conveyed by the adjustable nozzles 15, 12 to the outside of the drum, in the interior of appropriate containers, thereby ensuring the maximum recovering of the oil 8 which is present inside the drum 3, sensibly reducing in this way the residual oil in the olive husks.
  • baffle plate 9 By arranging the baffle plate 9 not in the immediate neighbourhood of the radial nozzles 12, it can be ensured that the oil 8 will hardly get over this latter baffle plate 9 and the oil recover operation will be the best possible.
  • the present invention provides therefore a plurality of means which, when combined with each other, in the manner described and according to the particular arrangement shown, ensure an optimum extraction of substantially the same oil quality, for the same kind of olives and equal operative conditions.
  • the oils extracted from the nozzles 12 and 15 have slightly different properties, because the baffle plate 7' is not pierced.
  • the oil extraction is also carried out in an optimum way.
  • the central baffle plate 7' has been arranged on the shaft 14 of the screw conveyor 5, in order to form two separate chambers 22,23 inside the drum 3.
  • This baffle plate 7' does not have apertures (the apertures 21 of baffle plate 7 in the first embodiment) and allows the passage of the olive husks from the first chamber 22 to the second chamber 23, and stops simultaneously the passage of oil from the chamber 23 towards the chamber 22.
  • the feed tube 6 ends on the side of the chamber 22 with respect to the baffle plate 7', that is on the left of the baffle plate 7, in Fig. 6.
  • the separation of the three substances "water-oil-olive husks" of the olive slurry is performed inside the chamber 22, said olive slurry being supplied by the feed tube 6. Because of the centrifugal force, the olive husks move towards the periphery, that is to the inner wall of the drum 3, and are carried by the screw conveyor 5, to the second extraction chamber 23.
  • the oil which has a lower specific weight with respect to water, settles between the water outflow level corresponding to the position of the nozzles 1, and the oil outflow level determined by the special adjustable nozzles 15 through which oil is discharged.
  • the baffle plate 2 which is arranged at the leading end of the shaft 14 of the screw conveyor, between the water outlet nozzles 1 and the oil outlet nozzles 15, prevents oil from flowing out together with water, and moreover, forces water to get over it before being discharged through the special nozzles 1, as has been said before, during the description of the first embodiment.
  • the olive husks containing the residual water and a reduced oil percentage are dehydrated in the trailing zone of the drum 3.
  • the residual oil contained in the olive husks forms a ring inside the chamber 23, due to the centrifugal force, and flows out from the adjustable nozzles 12.
  • baffle plate 9 On the shaft 14 of the screw conveyor 5, another baffle plate 9 has been provided according to the prior art, as in the first embodiment, said baffle plate stopping the passage of oil which otherwise would be discharged together with olive husks.
  • the olive husks are carried by the screw conveyor 5 towards the outlet 10 and are discharged to the outside.
  • a supply duct 24 is provided to let the washing water arrive in the interior of the second chamber 23.
  • the advantage of the present centrifuge with respect to those produced until now, is that by means of a single centrifuge it is possible to perform a two-step (double) extraction: oil is extracted from the olive slurry inside the first extraction chamber 22, and oil is extracted also from the olive husks, in the second extraction chamber 23. In other words, it is the same as if the olive husks coming from a centrifuge involving a single extraction, would be processed again inside a second centrifuge, with consequent econmical advantages.
  • the second embodiment (Fig. 6) has some aspects which are different from the first embodiment (Figs. 1-5).
  • the oil extracted from the second chamber 23 is likely to be slightly different from that recovered from the first chamber 22.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Centrifugal Separators (AREA)
  • Extraction Or Liquid Replacement (AREA)
EP19970830001 1996-01-18 1997-01-09 Horizontal centrifuge for an optimum oil extraction Expired - Lifetime EP0785029B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
IT96RM000033 IT1283884B1 (it) 1996-01-18 1996-01-18 Centrifuga orizzontale per l'estrazione di olio da un impasto oleoso, operante senza aggiunta di acqua, con doppia camera di centrifugazione
ITRM960033 1996-01-18
ITRM960314 1996-05-08
IT96RM000314 IT1284384B1 (it) 1996-05-08 1996-05-08 Centrifuga orizzontale per l'estrazione di olio da un impasto oleoso, operante senza aggiunta di acqua e dotata di mezzi per l'estrazione

Publications (2)

Publication Number Publication Date
EP0785029A1 EP0785029A1 (en) 1997-07-23
EP0785029B1 true EP0785029B1 (en) 2001-05-30

Family

ID=26332092

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970830001 Expired - Lifetime EP0785029B1 (en) 1996-01-18 1997-01-09 Horizontal centrifuge for an optimum oil extraction

Country Status (4)

Country Link
EP (1) EP0785029B1 (el)
DE (1) DE69704963T2 (el)
ES (1) ES2158477T3 (el)
GR (1) GR3036050T3 (el)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120149867A1 (en) * 2008-09-12 2012-06-14 Emerald Fisheries Method For Processing Crustaceans And Products Thereof
US9167832B2 (en) 2008-09-12 2015-10-27 Emerald Fisheries As Low flouride crustacean concentrated hydrolysate fraction compositions
US10499673B2 (en) 2008-09-12 2019-12-10 Rimfrost Technologies As Method for processing crustaceans to produce low fluoride/low trimethyl amine products thereof

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2189564B1 (es) * 1998-11-16 2004-06-16 Nuova M.A.I.P. Macchine Agricole Industriali Pieralisi S.P.A. Aparato para la extraccion centrifuga, a partir de productos que producen aceite, tales como aceitunas y similares, de dos componentes liquidos, utilizacion del mismo y procedimiento para el secado y la separacion del aceite.
GR1004822B (el) * 1998-11-16 2005-02-23 Nuova M.A.I.P. Macchine Agricole Industriali Pieralisi S.P.A. Συσκευη για τη φυγοκεντρικη εκχυλιση υγρων συστατικων απο ελαιοφορα προιοντα και παρομοια, εφοδιασμενη με μεσα για την ακτινικη εκχυλιση του υγρου συστατικου με μεγαλυτερο ειδικο βαρος
DE19952804C2 (de) 1999-11-02 2003-07-03 Westfalia Separator Ind Gmbh Vollmantel-Schneckenzentrifuge zur Verarbeitung eines zur Schäumung neigenden Schleudergutes
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.
GR1004594B (el) * 2001-04-12 2004-06-10 Nuova M.A.I.P. Macchine Agricole Industriali Pieralisi S.P.A. Συσκευη για τη φυγοκεντρικη εκχυλιση υγρων συστατικων απο ζυμες / υπολειμματα ελαιουχων καρπων με κινηση του ελαφροτερου υγρου συστατικου κατα την αυτη φορα με εκεινη του στερεου υπολειμματος
DE10125096A1 (de) * 2001-05-23 2002-11-28 Hiller Gmbh Dekantierzentrifuge
DK200200598A (da) * 2002-04-22 2003-10-23 Alfa Laval Copenhagen As Dekantercentrifuge
DE10220757B4 (de) 2002-05-08 2004-06-24 Westfalia Separator Ag Zentrifuge, insbesondere Separator
DE10223802B4 (de) 2002-05-29 2005-06-09 Westfalia Separator Ag Vollmantel-Schneckenzentrifuge
SE525413C2 (sv) * 2003-06-18 2005-02-15 Alfa Laval Corp Ab En skruvtransportör för en dekantercentrifug
DK200400388A (da) * 2004-03-09 2005-09-10 Alfa Laval Copenhagen As Centrifuge til separering af en tilfört væske omfattende en emulsion af to væskefaser med forskellige massefylder i en let væskefase og en tung væskefase
ITMI20070345A1 (it) * 2007-02-22 2008-08-23 Nuova Maip Macchine Agricole Industriali Procedimento e apparecchiatura per la separazione e l'estrazione di differenti prodotti di paste di oleaginose e simili
CN102423549B (zh) 2011-08-02 2013-12-18 中国科学院力学研究所 一种管道式导流片型油水分离器的除水装置和油水旋流分离器
CN102600992B (zh) * 2012-03-28 2013-11-06 湖南省三力士农机制造有限公司 卧式螺旋离心滤油机的油室
CN102824966B (zh) * 2012-07-31 2014-08-13 天圣环保工程（成都）有限公司 一种螺旋推料器及其应用的卧螺离心机
KR101831556B1 (ko) 2017-05-11 2018-02-22 허승우 폐기물의 오일추출이 가능한 원심분리기
CN110639239B (zh) * 2019-09-25 2021-04-02 杨凤凯 一种污油过滤装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK87580A (da) * 1979-03-15 1980-09-16 R E High Centrifuge
DE3202294C1 (de) * 1982-01-26 1983-04-21 Westfalia Separator Ag, 4740 Oelde Kontinuierlich arbeitender Vollmantel-Gegenstrom-Zentrifugalextraktor
GB8328894D0 (en) * 1983-10-28 1983-11-30 Broadbent & Sons Ltd Thomas Decanting type centrifuges
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.
EP0704248B1 (en) * 1994-09-29 1997-12-17 Nuova M.A.I.P., Macchine Agricole Industriali Pieralisi S.P.A. Process and apparatus for the centrifugal extraction of oil of first and second pressings

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120149867A1 (en) * 2008-09-12 2012-06-14 Emerald Fisheries Method For Processing Crustaceans And Products Thereof
US8557297B2 (en) * 2008-09-12 2013-10-15 Olympic Seafood, As Method for processing crustaceans and products thereof
US9068142B2 (en) 2008-09-12 2015-06-30 Olympic Seafood As Reduced fluoride crustacean oil compositions
US9167832B2 (en) 2008-09-12 2015-10-27 Emerald Fisheries As Low flouride crustacean concentrated hydrolysate fraction compositions
US9480273B2 (en) 2008-09-12 2016-11-01 Rimfrost As Reduced flouride crustacean de-oiled protein-phospholipid complex compositions
US9907321B2 (en) 2008-09-12 2018-03-06 Rimfrost Technologies As Separating crustacean polar phospholipid compositions without emulsification
US10499673B2 (en) 2008-09-12 2019-12-10 Rimfrost Technologies As Method for processing crustaceans to produce low fluoride/low trimethyl amine products thereof
US10701954B2 (en) 2008-09-12 2020-07-07 Rimfrost Technologies As Reduced fluorine crustacean polar phospholipid compositions

Also Published As

Publication number Publication date
DE69704963D1 (de) 2001-07-05
DE69704963T2 (de) 2002-01-24
GR3036050T3 (en) 2001-09-28
EP0785029A1 (en) 1997-07-23
ES2158477T3 (es) 2001-09-01

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