WO1994008723A1 - Separateur centrifuge - Google Patents

Separateur centrifuge Download PDF

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Publication number
WO1994008723A1
WO1994008723A1 PCT/SE1993/000845 SE9300845W WO9408723A1 WO 1994008723 A1 WO1994008723 A1 WO 1994008723A1 SE 9300845 W SE9300845 W SE 9300845W WO 9408723 A1 WO9408723 A1 WO 9408723A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid
rotor
outlet
centrifugal separator
chamber
Prior art date
Application number
PCT/SE1993/000845
Other languages
English (en)
Inventor
Leonard Borgström
Claes-Göran Carlsson
Peter Franzén
Claes Inge
Torgny Lagerstedt
Hans Moberg
Original Assignee
Alfa Laval Separation Ab
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 Alfa Laval Separation Ab filed Critical Alfa Laval Separation Ab
Priority to EP93923702A priority Critical patent/EP0616557B1/fr
Priority to JP50991394A priority patent/JP3165443B2/ja
Priority to DE69323416T priority patent/DE69323416T2/de
Publication of WO1994008723A1 publication Critical patent/WO1994008723A1/fr

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
    • B04B1/04—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 an 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 during operation in the separation chamber, 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, which from the said liquid body extends radially inwards to a central outlet, and in which at least one outlet channel is formed, one end of which has an inlet located in said liquid body, and the other end of which opens into an outlet connected to the discharge device.
  • the centrifugal separator comprises means connected to the rotor, which are arranged to entrain the separated liquid present in the outlet chamber in the rotation of the rotor during operation of the rotor and at the same time admit flow of such liquid in the outlet chamber radially outwards to the inlet of the outlet channel.
  • the means, which in the outlet chamber shall entrain the liquid into the rotation of the rotor is designed as at least one disk fixedly connected to the rotor and con- centrical to the same.
  • the outwardly directed liquid flow in the outlet chamber is distributed in more layers having a large total cross-sectional area, where ⁇ by the flow velocities in the layers and consequently the risk of air admixture decreases.
  • 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 a discharge separated liquid is less than in hitherto known centri- fugal separators of this kind with corresponding capa ⁇ bility to entrain the separated liquid in the outlet chamber.
  • the means to entrain, during the operation of the rotor, the separated liquid present in the outlet chamber comprises several around the rota ⁇ tional axis distributed and with the rotor rotating elongated elements, which between themselves form flow spaces, which extend axially, radially and in a circum ⁇ ferential direction of the rotor.
  • the elongated elements are straight and regularly oriented in an essential axial direction but they can alternatively be directed radially.
  • the elongated elements are irregularly oriented and abut with advantage against each other.
  • the elongated 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.
  • FIG. 1 schematically shows an axial section through a part of a centrifugal separator according to the invention
  • Fig 2 shows a view of a detail in a centrifugal separator according to the invention
  • Fig 3 shows a section along the line III-III in figure 2.
  • 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 let out inter ⁇ mittently a component, which has been separated from a mixture supplied to the rotor and been 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 in- and outlets are not shown in the figure.
  • a disc stack 8 consis ⁇ ting 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, in the figure shown, upper end an 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 and in the outlet chamber 10 form 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 these.
  • 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 from the rotational liquid body radially inwards 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.
  • means 20 are arranged fixedly connected to the end walls 12 and 13. These means 20 are 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 means 20.
  • the means 20 comprise an annular circular disc 21, which is fixedly connected to an end wall 12 or 13 concent- rical to 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 around the rotational axis and form between themselves flow spaces, which extend axially, radially and in the circumferential direction of the rotor.
  • the elongated elements 22 are fixedly connec ⁇ ted to each other via the disc 21 and is directed axially.
  • the flow spaces between the elongated elements 22 are open in the direction toward the stationary discharge device 17.
  • the means 20 shown as an example also comprises three wings fixedly connected to the disc 21, which extends 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 rotational speed in operation 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 is then mainly taken place 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 dis ⁇ charged during operation by bringing the valve slide 4 during periods of time 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 is taking place gently by the means 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 result 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 out ⁇ wards in layers, which extend along and connect the elongated elements 22 and along internal surfaces of the walls of the outlet chamber 10.
  • said means also comprise a wing liquid also flows radially outwards in layers along this. This flow radially outwards is distributed over relatively large layers.
  • the local maximum flow velocities can be kept low, which is especially important at the free liquid surface as the risk of air admixture is especially high there.
  • the 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.

Landscapes

  • Centrifugal Separators (AREA)

Abstract

L'invention se rapporte à un séparateur centrifuge comprenant un rotor qui forme une chambre d'admission, une chambre de séparation (5) et une chambre d'évacuation (10), dans laquelle un liquide, séparé lors du fonctionnement, forme un corps liquide rotatif avec une surface liquide libre dirigée radialement vers l'intérieur. Un dispositif d'évacuation (17) et un élément (20) sont disposés pour entraîner, lors du fonctionnement du rotor, le liquide présent dans la chambre d'évacuation (10), pendant la rotation du rotor, et pour laisser passer l'écoulement de ce liquide radialement vers l'extérieur, dans l'admission (19) avec un léger risque d'addition d'air. Ledit élément (20) comprend un nombre d'éléments allongés répartis autour de l'axe rotatif et tournant avec le rotor qui forment entre eux des espaces d'écoulement s'étendant axialement radialement et dans le sens de la circonférence.
PCT/SE1993/000845 1992-10-19 1993-10-15 Separateur centrifuge WO1994008723A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP93923702A EP0616557B1 (fr) 1992-10-19 1993-10-15 Separateur centrifuge
JP50991394A JP3165443B2 (ja) 1992-10-19 1993-10-15 遠心分離器
DE69323416T DE69323416T2 (de) 1992-10-19 1993-10-15 Trennzentrifuge

Applications Claiming Priority (2)

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
SE9203056-8 1992-10-19

Publications (1)

Publication Number Publication Date
WO1994008723A1 true WO1994008723A1 (fr) 1994-04-28

Family

ID=20387506

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1993/000845 WO1994008723A1 (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)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7041045B2 (en) * 2001-09-05 2006-05-09 Westfalia Separator Ag Skimmer device for discharging liquid from a centrifugal drum
DE102017103065A1 (de) 2017-02-15 2018-08-16 Flottweg Se Auslasseinrichtung eines Separators

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8598022B2 (en) 2009-10-27 2013-12-03 Advanced Technology Materials, Inc. Isotopically-enriched boron-containing compounds, and methods of making and using same
TWI582836B (zh) 2010-02-26 2017-05-11 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
WO2015023903A1 (fr) 2013-08-16 2015-02-19 Entegris, Inc. Implantation de silicium dans des substrats et fourniture de compositions de précurseur du silicium à cette fin

Citations (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
US5024648A (en) * 1987-10-08 1991-06-18 Alfa-Laval Separation Ab Centrifugal separator with a discharge device

Patent Citations (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
US5024648A (en) * 1987-10-08 1991-06-18 Alfa-Laval Separation Ab Centrifugal separator with a discharge device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7041045B2 (en) * 2001-09-05 2006-05-09 Westfalia Separator Ag Skimmer device for discharging liquid from a centrifugal drum
DE102017103065A1 (de) 2017-02-15 2018-08-16 Flottweg Se Auslasseinrichtung eines Separators
WO2018149452A1 (fr) 2017-02-15 2018-08-23 Flottweg Se Dispositif de sortie d'un séparateur
DE102017103065B4 (de) * 2017-02-15 2021-01-21 Flottweg Se Auslasseinrichtung eines Separators
US11446679B2 (en) 2017-02-15 2022-09-20 Flottweg Se Outlet device of a separator

Also Published As

Publication number Publication date
DE69323416T2 (de) 1999-06-10
SE9203056D0 (sv) 1992-10-19
SE470493B (sv) 1994-06-06
SE9203056L (sv) 1994-04-20
DE69323416D1 (de) 1999-03-18
ES2129524T3 (es) 1999-06-16
JPH07502454A (ja) 1995-03-16
JP3165443B2 (ja) 2001-05-14
EP0616557B1 (fr) 1999-02-03
EP0616557A1 (fr) 1994-09-28

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