EP0616557B1 - Separateur centrifuge - Google Patents

Separateur centrifuge Download PDF

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Publication number
EP0616557B1
EP0616557B1 EP93923702A EP93923702A EP0616557B1 EP 0616557 B1 EP0616557 B1 EP 0616557B1 EP 93923702 A EP93923702 A EP 93923702A EP 93923702 A EP93923702 A EP 93923702A EP 0616557 B1 EP0616557 B1 EP 0616557B1
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EP
European Patent Office
Prior art keywords
liquid
rotor
outlet
chamber
centrifugal separator
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
EP93923702A
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German (de)
English (en)
Other versions
EP0616557A1 (fr
Inventor
Leonard Borgström
Claes-Göran Carlsson
Peter Franzen
Claes Inge
Torgny Lagerstedt
Hans Moberg
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.)
Alfa Laval Separation AB
Original Assignee
Alfa Laval Separation AB
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Filing date
Publication date
Application filed by Alfa Laval Separation AB filed Critical Alfa Laval Separation AB
Publication of EP0616557A1 publication Critical patent/EP0616557A1/fr
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    • 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

Definitions

  • the present invention concerns a centrifugal separator comprising a rotor, which forms a inlet chamber for liquid mixture of components, a separation chamber connected to the inlet chamber, an outlet chamber, which via a passage communicates with the separation chamber for the reception of a liquid separated in the separation chamber during operation of the rotor, and which is so designed that liquid present therein during operation forms a rotating liquid body with a radially inwards directed free liquid surface.
  • the centrifugal separator also comprises a stationary discharge device extending radially inwardly from the said liquid body to a central outlet, at least one outlet channel being formed in the discharge device one end of the outlet channel having an inlet located in said liquid body, and the other end of the outlet channel opening into an outlet connected to the discharge device.
  • the centrifugal separator comprises elongate elements connected to the rotor for entraining separated liquid present in the outlet chamber to rotate with the rotary during operation of the rotor, said members defining there between spaces extending in the axial and radial directions to permit flow of said liquid in said directions in the outlet chamber for said liquid to flow to the inlet of the outlet channel, said elongate elements being distributed in a group disposed around the rotational axis.
  • the object of the present invention is to provide a centrifugal separator of the kind initially described, in which the risk of air admixture in the discharged separated liquid is less than in hitherto known centrifugal separators of this kind with corresponding capability to entrain the separated liquid in the outlet chamber.
  • centrifugal separator characterised in that said elongate elements are separated from adjacent elements in different directions and a plurality of interconnected flow spaces are formed between the elements enabling liquid also to flow circumferentially between the elements within the volume of the outlet chamber occupied by the group of elongated elements.
  • the elongate elements are straight and regularly oriented and they extend substantially parallel to the rotor axis, but they can alternatively be directed substantially radially.
  • the elongate elements are irregularly oriented and they can with advantage abut against each other.
  • the elongate elements can be supplemented by at least one wing fixedly connected to the rotor, the wing extending radially and axially in the outlet chamber, in a way such that an efficient entrainment of the liquid in the outlet chamber is obtained.
  • the part of the centrifugal separator shown in Figure 1 comprises a rotor, which has a lower part 1 and an upper part 2, which are joined together by a locking ring 3. Inside the rotor an axially movable valve slide 4 is arranged.
  • This valve slide delimits together with the upper part 2 a separation chamber 5 and is arranged to open and close an outlet passage between the separation chamber 5 and outlet openings 6 to discharge intermittently a component, which has been separated from a mixture supplied to the rotor and has accumulated at the periphery of the separation chamber.
  • the valve slide 4 delimits together with the lower part 1 a closing chamber 7, which is provided with an inlet and a throttled outlet for a closing liquid. These inlets and outlets are not shown in the figure.
  • a disc stack 8 consisting of a number of conical separation discs is arranged between a distributor 9 and the upper part 2.
  • the upper part 2 forms in its upper end (as illustrated) a outlet chamber 10, to which a specific lighter liquid separated during operation from a mixture supplied to the rotor can flow from the separation chamber 5 via a passage 11.
  • the liquid forms a rotating liquid body with a radially inwards directed free liquid surface at a certain radial level.
  • the outlet chamber 10 is delimited by two axial end walls 12, 13 and a circumferential wall 14 which extends between the end walls.
  • a stationary inlet tube 15 is arranged, which opens in the interior of the distributor 9.
  • a stationary outlet tube 16 is arranged for the specific lighter liquid in the supplied mixture.
  • the outlet tube 16 extends into the outlet chamber 10.
  • a stationary discharge device 17 is arranged around the inlet tube 15. The discharge device 17 extends radially inwardly from the rotating liquid body to the inlet tube 15 and forms inside itself at least one outlet channel 18, one end of which has a peripheral inlet 19, and the other end of which opens in the interior of the outlet tube 16.
  • an entraining device 20 is arranged fixedly connected to the end walls 12 and 13. This device 20 is arranged to entrain the liquid present in the outlet chamber 10 during operation in the rotation of the rotor and admit flow of the same radially outwards to the inlet 19 of the outlet channel 18.
  • Figure 2 and 3 show more in detail the design of said device 20.
  • the device 20 comprises an annular circular disc 21, which is fixedly connected to an end wall 12 or 13 and concentric with the rotation axis.
  • On the axial side of the disc, which is directed towards the stationary discharge device 17 several elongated elements 22 are distributed in an array around the rotational axis and these elements form between themselves flow spaces, which extend axially, radially and in the circumferential direction of the rotor allowing the liquid to flow in these directions within the volume occupied by the elongated elements.
  • the elongated elements 22 are fixedly connected to each other via the disc 21 and are directed axially.
  • the flow spaces between the elongated elements 22 are open in the direction toward the stationary discharge device 17.
  • three wings are fixedly connected to the disc 21 to extend radially and axially in the outlet chamber 10.
  • a centrifugal separator which is designed according to the invention works in the following manner:
  • the rotor Upon start of the centrifugal separator the rotor is brought to rotate and the separation chamber 5 is closed by supplying a closing liquid to the closing chamber 7 through an inlet (not shown). After the separation chamber 5 has been closed the liquid mixture, which is to be centrifugally treated is supplied to the separation chamber 5 through the inlet tube 15 and the distributor 9. Gradually the separation chamber 5 is filled up, the rotor reaches the operational rotational speed and the conditions are stabilized inside the separation chamber. The components contained in the liquid mixture are separated under the influence of the centrifugal forces acting on the same.
  • the separation takes place mainly in the inter-spaces between the conical discs in the disc stack 8.
  • the specific heavier component is thrown radially outwards and is accumulated in the radially outermost part of the separation chamber, whereas the specific lighter liquid flows radially inwards in these interspaces.
  • the specific heavier component is intermittently discharged during operation by causing the valve slide 4 to uncover the peripheral outlet openings 6.
  • the specific lighter liquid flows out through the separation chamber 5 through the passage 11 to the outlet chamber 10, in which it forms a rotating liquid body with a radially inwards directed free liquid surface.
  • the liquid present in the outlet chamber 10 is discharged through the outlet channel 18 in the stationary discharge device 17 via its inlet 19.
  • the entrainment of the liquid present in the outlet chamber 10 effected gently by the device 20 rotating with the rotor and by other internal surfaces of the walls of the outlet chamber.
  • the liquid located closest to the discharge device 17 is slowed down by the contact with the external surfaces of the discharge device 17. Thereby, different parts of the liquid volume located in the outlet chamber 10 will obtain different rotational speeds.
  • the contact between the liquid and the external surfaces of the discharge device 17 results in that a circulating flow is generated in the outlet chamber 10, the liquid flowing radially inwards along the external surfaces of the discharge device 17 and radially outwards in layers, which extend along and connect the elongated elements 22 and along internal surfaces of the walls of the outlet chamber 10.
  • said device 20 also comprises a wing 23, liquid also flows radially outwards in layers along this wing.
  • passage 11 is arranged at essentially the same radius as the radius at which the inlet 19 of the outlet channel 18 is located the radial outwardly directed flow is to be referred to the internal circulation in the outlet chamber 10.

Claims (9)

  1. Séparateur centrifuge comprenant
    un rotor formant une chambre d'entrée pour un mélange liquide de constituants, une chambre de séparation (5) raccordée à la chambre d'entrée et une chambre de sortie (10), par l'intermédiaire de laquelle un passage (11) communique avec la chambre de séparation pour la réception d'un liquide séparé dans la chambre de séparation pendant le fonctionnement du rotor et qui est agencé de telle sorte que le liquide présent dans cette chambre pendant le fonctionnement forme un corps liquide en rotation avec une surface libre du liquide dirigée radialement vers l'intérieur,
    un dispositif fixe de décharge (17) qui s'étend radialement vers l'intérieur à partir dudit corps liquide en direction d'une sortie centrale, au moins un canal de sortie (18) étant formé dans le dispositif de décharge, une extrémité du canal de sortie possédant une entrée (19) située dans ledit corps liquide, et l'autre extrémité du canal de sortie débouchant au niveau d'une sortie raccordée au dispositif de décharge, et
    des éléments allongés (22) raccordés au rotor pour l'entraínement du liquide séparé présent dans la chambre de sortie (10) de manière à tourner avec le rotor pendant le fonctionnement du rotor, lesdits éléments définissant entre eux des espaces d'écoulement s'étendant dans les directions axiale et radiale pour permettre un écoulement dudit liquide dans lesdites directions dans la chambre de sortie (10) pour que ledit liquide soit entrainé jusqu'à l'entrée (19) du canal de sortie (18),
    lesdits éléments allongés (22) sont répartis dans un groupe disposé autour de l'axe de rotation,
    caractérisé en ce que les éléments sont séparés d'éléments adjacents dans des directions différentes et qu'une pluralité d'espaces d'écoulement interconnectés sont formés entre les éléments en permettant au liquide de circuler également circonférentiellement entre les éléments à l'intérieur du volume de la chambre de sortie occupé par le groupe d'éléments allongés (22).
  2. Séparateur centrifuge selon la revendication 1, caractérisé en ce que les éléments allongés (22) sont raccordés de façon fixe les uns aux autres.
  3. Séparateur centrifuge selon la revendication 1 ou 2, caractérisé en ce que les éléments allongés (22) sont essentiellement rectilignes et orientés régulièrement.
  4. Séparateur centrifuge selon la revendication 2 ou 3, caractérisé en ce qu'au moins certains des éléments allongés (22) s'étendent essentiellement parallèlement à l'axe du rotor.
  5. Séparateur centrifuge selon la revendication 2 ou 3, caractérisé en ce qu'au moins certains des éléments allongés (22) s'étendent essentiellement radialement dans la chambre de sortie.
  6. Séparateur centrifuge selon la revendication 1 ou 2, caractérisé en ce que les éléments allongés (22) sont orientés de façon irrégulière.
  7. Séparateur centrifuge selon la revendication 6, caractérisé en ce que des éléments allongés (22) sont en butée les uns contre les autres.
  8. Séparateur centrifuge selon l'une quelconque des revendications précédentes, caractérisé en ce qu'en plus des éléments allongés (22), au moins une ailette (23) est raccordée de façon fixe au rotor et s'étend radialement et axialement dans la chambre de sortie (10).
  9. Séparateur centrifuge selon l'une quelconque des revendications précédentes, caractérisé en ce que les espaces entre les éléments allongés sont ouverts dans une direction tournée vers le dispositif fixe de sortie (17).
EP93923702A 1992-10-19 1993-10-15 Separateur centrifuge Expired - Lifetime EP0616557B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9203056A SE470493B (sv) 1992-10-19 1992-10-19 Centrifugalseparator med i en utmatningskammare anordnade långsträckta medbringande element
SE9203056 1992-10-19
PCT/SE1993/000845 WO1994008723A1 (fr) 1992-10-19 1993-10-15 Separateur centrifuge

Publications (2)

Publication Number Publication Date
EP0616557A1 EP0616557A1 (fr) 1994-09-28
EP0616557B1 true EP0616557B1 (fr) 1999-02-03

Family

ID=20387506

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93923702A Expired - Lifetime EP0616557B1 (fr) 1992-10-19 1993-10-15 Separateur centrifuge

Country Status (6)

Country Link
EP (1) EP0616557B1 (fr)
JP (1) JP3165443B2 (fr)
DE (1) DE69323416T2 (fr)
ES (1) ES2129524T3 (fr)
SE (1) SE470493B (fr)
WO (1) WO1994008723A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10143405C2 (de) * 2001-09-05 2003-12-18 Westfalia Separator Ag Schälscheibenvorrichtung zum Ableiten von Flüssigkeit aus einer Zentrifugentrommel
US8598022B2 (en) 2009-10-27 2013-12-03 Advanced Technology Materials, Inc. Isotopically-enriched boron-containing compounds, and methods of making and using same
TWI689467B (zh) 2010-02-26 2020-04-01 美商恩特葛瑞斯股份有限公司 用以增進離子植入系統中之離子源的壽命及性能之方法與設備
SG11201601015RA (en) 2013-08-16 2016-03-30 Entegris Inc Silicon implantation in substrates and provision of silicon precursor compositions therefor
DE102017103065B4 (de) 2017-02-15 2021-01-21 Flottweg Se Auslasseinrichtung eines Separators

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE176539C (fr) *
CH156097A (fr) * 1930-12-30 1932-07-31 Leonard Ringius Carlos Dispositif pour machines purifieuses et écrémeuses de lait.
US2125453A (en) * 1934-06-30 1938-08-02 Laval Separater Company De Antifroth discharging means for centrifugal separators
SE459159B (sv) * 1987-10-08 1989-06-12 Alfa Laval Separation Ab Centrifugalseparator med utmatningsorgan

Also Published As

Publication number Publication date
SE470493B (sv) 1994-06-06
EP0616557A1 (fr) 1994-09-28
SE9203056L (sv) 1994-04-20
SE9203056D0 (sv) 1992-10-19
DE69323416D1 (de) 1999-03-18
DE69323416T2 (de) 1999-06-10
JPH07502454A (ja) 1995-03-16
JP3165443B2 (ja) 2001-05-14
ES2129524T3 (es) 1999-06-16
WO1994008723A1 (fr) 1994-04-28

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