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EP3666391B1 - Séparateur centrifuge - Google Patents

Séparateur centrifuge Download PDF

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Publication number
EP3666391B1
EP3666391B1 EP19214930.0A EP19214930A EP3666391B1 EP 3666391 B1 EP3666391 B1 EP 3666391B1 EP 19214930 A EP19214930 A EP 19214930A EP 3666391 B1 EP3666391 B1 EP 3666391B1
Authority
EP
European Patent Office
Prior art keywords
phase
ejection
liquid food
discs
flow
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
EP19214930.0A
Other languages
German (de)
English (en)
Other versions
EP3666391A1 (fr
Inventor
Hoong Wai Yong
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.)
Tetra Laval Holdings and Finance SA
Original Assignee
Tetra Laval Holdings and Finance SA
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Publication date
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Publication of EP3666391A1 publication Critical patent/EP3666391A1/fr
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Publication of EP3666391B1 publication Critical patent/EP3666391B1/fr
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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
    • B04B1/04—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with inserted separating walls
    • B04B1/08—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with inserted separating walls of conical shape
    • 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
    • B04B1/10—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl
    • B04B1/14—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl with periodical discharge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B11/00—Feeding, charging, or discharging bowls
    • B04B11/04—Periodical feeding or discharging; Control arrangements therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B7/00—Elements of centrifuges
    • B04B7/08—Rotary bowls
    • B04B7/12—Inserts, e.g. armouring plates
    • B04B7/14—Inserts, e.g. armouring plates for separating walls of conical shape

Definitions

  • the invention relates to a centrifugal separator for separating liquid food into a light phase, a heavy phase, and an ejection phase that comprises solid impurities, and to a method of separating liquid food.
  • centrifugal separators Separators for separating liquid food into different phases of varying density under the influence of a centrifugal force are called centrifugal separators.
  • the liquid food is introduced in a rotating disc stack of the centrifugal separator.
  • heavier sediment and lighter particles in the liquid food begin to settle radially outwards respectively inwards in the separation channels according to their density.
  • Heavier solid impurities collect in a sediment space at the periphery of the separator, and are intermittently ejected as an ejection phase from an ejection port at the periphery.
  • this is achieved by a centrifugal separator according to claim 1.
  • this is achieved by a method for separating liquid food according to claim 11.
  • Having a first set of discs to limit the liquid food to flow between a periphery and a center portion of the disc stack, and a second set of discs comprising distribution openings for distributing a flow of the light phase from the distribution openings towards a center channel and a flow of the heavy phase from the distribution openings towards the periphery, provides for improved separation performance for liquid food containing particles of reduced size or increased density while minimizing product losses.
  • Fig. 1 is a schematic illustration of a centrifugal separator 100 for separating liquid food (RP) into a light phase (LP), a heavy phase (HP), and an ejection phase (SI) that comprises solid impurities (SI).
  • the separator 100 comprises a centrifuge bowl 101, and an inlet 102 for the liquid food (RP) at a bottom portion 103 of the centrifuge bowl 101.
  • the separator 100 comprises outlets 104, 104', for the heavy phase (HP) and the light phase (LP) at a top portion 105 of the centrifuge bowl 101.
  • An ejection port 106 is arranged at a periphery 107 of the centrifuge bowl 101 to eject the ejection phase (SI) from the centrifuge bowl 101.
  • Having a first set of discs 110 to limit the liquid food (RP) to flow between the periphery 107 and the center portion 113 of the disc stack 108 provides for maximizing the radial distance along which the liquid food (RP) flows, which allows for an efficient separation of solid impurities (SI).
  • the liquid food (RP) flows radially inwards through the interspaces 112 towards the center portion 113, and on the way through the disc stack 108 the solid impurities (SI) are separated and thrown back along the undersides of the discs 109 to the periphery 107 where they are collected and subsequently ejected through the ejection port 106.
  • the time of passage also allows very small particles to be separated. This is particularly advantageous in case the liquid food contains an increased ratio of fine particles, which may be the case for e.g. coconut water.
  • the first set of discs 110 provides for an efficient separation of small solid impurities (SI)
  • the second set of discs 111 provides for a separation of the heavy phase (HP) and the light phase (LP) via the distribution of flow through the distribution openings 114 as described above.
  • fat particles of lower density flows radially inwards from the distribution openings 114, as opposed to the heavy phase (HP), and the fat can be extracted through the outlet for the light phase (104').
  • the flow of liquid food (RF) through the inlet 102 may be reduced or completely stopped when the ejection phase (SI) is ejected through the ejection port 106. Completely stopping the flow of liquid food (RF) through the inlet 102 may provide for reducing the aforementioned turbulence further.
  • LP light phase
  • HP heavy phase
  • the first outlet valve 118 may be arranged to increase the flow of the light phase (LP) through the outlet 104' for the light phase (LP) for a defined second time interval ( ⁇ t 2 ).
  • the second time interval ( ⁇ t 2 ) may start at a predetermined first time (t' s ) before the ejection phase (SI) is ejected through the ejection port (106), as schematically illustrated in Fig. 2 . This provides for further avoiding the aforementioned backflow and mixing of the light phase (LP) and the heavy phase (HP).
  • the second time interval ( ⁇ t 2 ) may further end at a predetermined second time (t' e ) after the ejection phase (SI) is ejected through the ejection port 106.
  • the predetermined first time (t s ) of the first time interval ( ⁇ t 1 ) may be in the range of 1 to 4 seconds before the ejection phase (SI) is ejected through the ejection port 106.
  • the predetermined second time (t' s ) of the second time interval ( ⁇ t 2 ) may be in the range of 1 to 4 seconds before the ejection phase (SI) is ejected through the ejection port 106.
  • a range of 1 to 4 seconds may provide for a particularly efficient separation with reduced risk of mixing the light phase (LP) and the heavy phase (HP) as well as minimized product losses.
  • the separator 100 may comprise a second outlet valve 119 that is arranged at the outlet 104 for the heavy phase (HP) to reduce the flow of the heavy phase (HP) through the outlet 104 for the heavy phase (HP) when the ejection phase (SI) is ejected through the ejection port 106.
  • the extraction of the heavy phase (HP) may thus be reduced or avoided during the ejection of the solid impurities (SI). Any undesired turbulence or backflow as described above may thus not affect the heavy phase (HP) and the extraction thereof may be resumed as the ejection is completed.
  • Fig. 3b illustrates another flow chart of a method 200.
  • the method 200 may comprise reducing 203 the flow of the liquid food (RP) into the separator 100 while ejecting 204 the ejection phase (SI) from the separator 100. Turbulence in the separator 100 may thus be reduced, as described above.
  • RP liquid food
  • SI ejection phase
  • the liquid food (RP) may be coconut water. It is conceivable that the liquid food (RP) may comprise other food where separation of a light phase (LP), a heavy phase (HP), and solid impurities (IS) is desirable.
  • LP light phase
  • HP heavy phase
  • IS solid impurities
  • the method 200 may be carried out with a temperature of the liquid food (RP) in the range 4 - 15°C. This provides for facilitated separation of small solid impurities (SI) since the particles may form larger aggregates more easily in this temperature range. Hence, in case of separating coconut water, the coconut water may have a temperature in the range 4 - 15°C.

Landscapes

  • Meat, Egg Or Seafood Products (AREA)
  • Centrifugal Separators (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)

Claims (15)

  1. Séparateur centrifuge (100) pour séparer un aliment liquide (RP) en une phase légère (LP), en une phase lourde (HP), et en une phase d'éjection (SI) qui comporte des impuretés solides (SI), ce séparateur (100) comprenant :
    un bol centrifuge (101),
    une entrée (102) pour l'aliment liquide (RP) au niveau d'une partie inférieure (103) du bol centrifuge (101) et des sorties (104, 104') pour la phase lourde (HP) et la phase légère (LP) au niveau d'une partie supérieure (105) du bol centrifuge (101),
    un orifice d'éjection (106)) disposé sur un pourtour (107= du bol centrifuge (101) afin d'éjecter la phase d'éjection (SI) du bol centrifuge (101),
    une pile de disques (108) de disques coniques (109) disposés à l'intérieur du bol centrifuge (101), cette pile de disques (108) comportant un premier ensemble de disques (110) disposés dans la partie inférieure (103), et un deuxième ensemble de disques (111) disposés dans la partie supérieure (105),
    l'aliment liquide (RP) passant à travers le premier ensemble de disques (110) avant de passer à travers le deuxième ensemble de disques (111) lorsqu'il est reçu à travers l'entrée (102),
    les disques (109) dans le premier ensemble de disques (110) définissant des espaces intermédiaires (112) entre les disques (109), ces espaces intermédiaires (112) s'étendant depuis le pourtour (107) de la pile de disques (108) jusqu'à une partie centrale axiale (113) de la pile de disques (108) et limitant l'aliment liquide (RP) à un écoulement entre le pourtour (107) et la partie centrale (113) de la pile de disques (108), et
    les disques (109) dans le deuxième ensemble de disques (111) définissant des espaces intermédiaires (112') entre les disques (109) et comportent des ouvertures de distribution (114) qui sont situées entre le pourtour (107) et la partie centrale (113) de la pile de disques (108) pour distribuer un écoulement de l'aliment liquide (RP) lorsque la phase légère (LP) s'écoule depuis les ouvertures de distribution (114) vers un canal central (115) à l'endroit de la partie centrale (113) et lorsque la phase lourde (HP) s'écoule depuis les ouvertures de distribution (114) vers le pourtour (107), caractérisé par
    une première soupape de sortie (118) qui est disposée au niveau de la sortie (104') pour la phase légère (LP) afin d'augmenter l'écoulement de la phase légère (LP) à travers la sortie (104') pour la phase légère (LP) lorsque la phase d'éjection (SI) est éjectée à travers l'orifice d'éjection (106), cette première soupape de sortie (118) étant agencée de façon à augmenter l'écoulement de la phase légère (LP) à travers la sortie (104') pour la phase légère (LP) pendant un deuxième intervalle de temps défini (Δt2), ce deuxième intervalle de temps (Δt2) commençant à un premier moment prédéterminé ((t's) avant que la phase d'éjection (SI) ne soit éjectée à travers l'orifice d'éjection (106).
  2. Séparateur selon la revendication 1, dans lequel le nombre de disques (109) dans le premier ensemble de disques (110) est plus grand que le nombre de disques (109) dans le deuxième ensemble de disques (111).
  3. Séparateur selon la revendication 1 ou 2, comportant :
    une soupape d'entrée (116) qui est disposée au niveau de l'entrée (102) afin de réduire l'écoulement de l'aliment liquide (RP) à travers l'entrée (102) lorsque la phase d'éjection (SI) est éjectée à travers l'orifice d'éjection (106).
  4. Séparateur selon la revendication 3, dans lequel la soupape d'entrée (116) est agencée de façon à réduire l'écoulement de l'aliment liquide (RF) à travers l'entrée (102) pendant un premier intervalle de temps défini (Δt1), ce premier intervalle de temps (Δt1) commençant à un premier moment prédéterminé (ts) avant que la phase d'éjection (SI) ne soit éjectée à travers l'orifice d'éjection (106).
  5. Séparateur selon la revendication 4, dans lequel le premier intervalle de temps (Δt1) se termine à un deuxième moment prédéterminé (te) après que la phase d'éjection (SI) a été éjectée à travers l'orifice d'éjection (106).
  6. Séparateur selon la revendication 1, dans lequel le deuxième intervalle de temps (Δt2) se termine à un deuxième moment prédéterminé (t'e) après que la phase d'éjection (SI) a été éjectée à travers l'orifice d'éjection (106).
  7. Séparateur selon la revendication 4, dans lequel le premier intervalle de temps (Δt1) est égal au deuxième intervalle de temps (Δt2).
  8. Séparateur selon la revendication 4, dans lequel le premier moment prédéterminé te et/ou t'e est situé dans la plage allant de 1 à 4 secondes avant que la phase d'éjection (SI) ne soit éjectée à travers l'orifice d'éjection (106).
  9. Séparateur selon la revendication 5 et 6, dans lequel le deuxième moment prédéterminé te et/ou t'e est situé dans la plage allant de 1 à 6 secondes après que la phase d'éjection (SI) a été éjectée à travers l'orifice d'éjection (106).
  10. Séparateur selon l'une quelconque des revendications 1 à 9, comportant une deuxième soupape de sortie (119) qui est disposée au niveau de la sortie (104) de la phase lourde (HP) afin de réduire l'écoulement de la phase lourde (HP) à travers la sortie (104) pour la phase lourde (HP) lorsque la phase d'éjection (SI) est éjectée à travers l'orifice d'éjection (106).
  11. Procédé (200) pour séparer de l'aliment liquide (RP) en une phase légère (LP), en une phase lourde (HP) et en une phase d'éjection (SI) qui comporte des impuretés solides (SI), dans un séparateur (100), ce procédé comprenant :
    la distribution (201) d'un écoulement de l'aliment liquide (RP) à travers un premier ensemble de disques (110) dans une pile de disques (108) disposée dans le séparateur (100) de manière à ce que l'aliment liquide (RP) soit limité à un écoulement entre un pourtour (107) et une partie centrale (113) de la pile de disques (108), et
    la distribution (202) d'un écoulement de l'aliment liquide (RP) à travers un deuxième ensemble de disques (111) dans la pile de disques (108) de manière à ce que la phase légère (LP) s'écoule depuis les ouvertures de distribution (114), situées entre le pourtour (107) et la partie centrale (113), vers un canal central (115) à l'endroit de la partie centrale (113), et de manière à ce que la phase lourde (HP) s'écoule depuis les ouvertures de distribution (114) vers le pourtour (107), caractérisé par
    l'augmentation (203') de l'écoulement de la phase légère (LP) à travers une sortie (104') pour la phase légère (LP) tout en éjectant (204) la phase d'éjection (SI) du séparateur (100), pendant un deuxième intervalle de temps (Δt2), ce deuxième intervalle de temps (Δt2) commençant à un premier moment prédéterminé (t'e) avant que la phase d'éjection (SI) ne soit éjectée à travers l'orifice d'éjection (106).
  12. Procédé selon la revendication 11, comprenant :
    la réduction (203) de l'écoulement de l'aliment liquide (RP) entrant dans le séparateur (100) tout en éjectant (204) la phase d'éjection (SI) du séparateur (100) .
  13. Procédé selon l'une quelconque des revendications 11 à 12, comprenant :
    la réduction (203") de l'écoulement de la phase lourde (HP) à travers une sortie (104) pour la phase lourde (HP) tout en éjectant (204) la phase d'éjection (SI) du séparateur (100).
  14. Procédé selon l'une quelconque des revendications 11 à 13, dans lequel l'aliment liquide (RP) est de l'eau de coco.
  15. Procédé selon l'une quelconque des revendications 11 à 14, dans lequel la température de l'aliment liquide (RP) est située dans la plage allant de 4°C à 15°C.
EP19214930.0A 2018-12-13 2019-12-10 Séparateur centrifuge Active EP3666391B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18212162 2018-12-13

Publications (2)

Publication Number Publication Date
EP3666391A1 EP3666391A1 (fr) 2020-06-17
EP3666391B1 true EP3666391B1 (fr) 2023-08-23

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EP19214930.0A Active EP3666391B1 (fr) 2018-12-13 2019-12-10 Séparateur centrifuge

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EP (1) EP3666391B1 (fr)
PH (1) PH12021551358A1 (fr)
WO (1) WO2020120499A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10654050B1 (en) 2019-05-21 2020-05-19 Empirical Innovations, Inc. Centrifugal separators and separation methods employing multiple pistons and facilitating intermediate material ejection
CN112170029A (zh) * 2020-08-12 2021-01-05 郑州天一萃取科技有限公司 一种新型高效转鼓及包括其的离心机

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2500100A (en) * 1946-08-10 1950-03-07 Laval Separator Co De Centrifugal bowl
SE227107C1 (fr) * 1967-05-18 1969-07-29 Alfa Laval Ab
DE2363741B2 (de) * 1973-12-21 1976-06-16 Steuergeraet fuer eine selbstentleerende vollmantelzentrifuge
SE520744C2 (sv) * 1999-03-08 2003-08-19 Alfa Laval Corp Ab Förfarande och anordning för indikering av ett oönskat drifttillstånd vid en centrifugalseparator

Also Published As

Publication number Publication date
PH12021551358A1 (en) 2021-11-22
BR112021008196A2 (pt) 2021-08-03
WO2020120499A1 (fr) 2020-06-18
EP3666391A1 (fr) 2020-06-17

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