EP0815944A2 - Zyklonabscheider - Google Patents

Zyklonabscheider Download PDF

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Publication number
EP0815944A2
EP0815944A2 EP97304879A EP97304879A EP0815944A2 EP 0815944 A2 EP0815944 A2 EP 0815944A2 EP 97304879 A EP97304879 A EP 97304879A EP 97304879 A EP97304879 A EP 97304879A EP 0815944 A2 EP0815944 A2 EP 0815944A2
Authority
EP
European Patent Office
Prior art keywords
aperture
chamber
oil
cyclone separator
wall
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.)
Withdrawn
Application number
EP97304879A
Other languages
English (en)
French (fr)
Other versions
EP0815944A3 (de
Inventor
Peter Gould
Martin Dennis Grewer
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.)
Fjords Processing AS
Original Assignee
Kvaerner Process Systems AS
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 Kvaerner Process Systems AS filed Critical Kvaerner Process Systems AS
Publication of EP0815944A2 publication Critical patent/EP0815944A2/de
Publication of EP0815944A3 publication Critical patent/EP0815944A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/12—Construction of the overflow ducting, e.g. diffusing or spiral exits

Definitions

  • This invention relates to a cyclone separator of the type used to separate a mixture comprising a fluid of a first density and fluid of a second density, for example, oil and water.
  • the separation of a mixture of fluids, for example oil and water, into its individual constituents is achieved in a known type of hydrocyclone by the generation of a vortex in the mixture within the hydrocyclone effecting centrifugal separation of the mixture so as to produce an "oil-core".
  • the separated oil and water are collected individually at respective output ports.
  • transfer of the oil from the oil-core to the oil output port may be less than optimum, especially when the hydrocyclone is operating at low flow/pressure with consequent reduction in centrifugal forces in the mixture.
  • a cyclone separator comprising a first chamber within which a separation vortex is generated in use, said chamber having an end wall, an aperture in said end wall, and, directing means tapering inwardly from said chamber towards said aperture for guiding a core of said vortex within the first chamber towards the aperture.
  • said wall defines said directing means.
  • said directing means substantially surrounds said aperture.
  • said directing means is a frustum of a cone defined by said wall with said aperture at its apical region.
  • the hydrocyclone 2 of Figure 1 comprises a tapering tube element 4 having a water output port 10 at its narrower end and an opposite end portion 6 having one or more, desirably tangential, input ports 8, and an oil output port 12.
  • the end portion 6 comprises a first chamber 14 defined in part by the tapering outer wall 26 of the tapering element 4.
  • the mixture inlet ports 8 are disposed in the wall 26 of the chamber 14 so as to be in fluid communication therewith and the portion 6 further includes a second chamber 16, and a dividing wall 18 separating the first and second chambers 14, 16.
  • the dividing wall 18 has an aperture 20 located centrally therein and providing access from the chamber 14 to the chamber 16, the chamber 16 including the oil outlet port 12.
  • the dividing wall 18 has a main, annular portion 28 of frusto-conical shape which extends into the chamber 14 and tapers inwardly, having a generatrix inclined at an angle to a plane P which is perpendicular to a central axis A of the hydrocyclone 2.
  • the central portion 34 of the dividing wall 18 is also of a frusto-conical shape which tapers inwardly, but the portion 34 extends in the opposite direction to the portion 28, towards the second chamber 16, and has the aperture 20 disposed at its apical region 36.
  • an oil-water mixture is introduced into the hydrocyclone 2 via the inlet ports 8 so that a vortex is created within the first chamber 14 and the tube element 4.
  • the individual constituents i.e. the oil and the water are separated, the water component residing at the periphery of the vortex and the oil component residing at the core of the vortex (known as an "oil-core").
  • the pressure balance within the hydrocyclone creates a back pressure providing the oil-core with an axial velocity towards the dividing wall 18.
  • the inwardly tapering portion 34 of the wall 18 directs the peripheral portion of the oil-core towards the aperture 20 thereby minimising loss of transfer of the oil core from the first chamber to the oil output port 12 in low inlet flow and pressure operating conditions.
  • the oil channelled from the oil-core towards the aperture 20 by the portion 34 passes through the aperture 20 into the second chamber 16 and leaves the hydrocyclone 2 via the oil output port 12.
  • the water at the periphery of the vortex travels along the tube element 4 towards the water output port 10.
  • the main portion 28 can be formed so as to have a flat or bulged shape.
  • the portion 34 may have a shape other than a frusto-conical configuration provided that it possesses a shape having an opening wider than the widest expected "core" in use and capable of collecting and guiding fluid inwardly towards the aperture 20, for example a curved, dished shape.

Landscapes

  • Cyclones (AREA)
EP97304879A 1996-07-06 1997-07-03 Zyklonabscheider Withdrawn EP0815944A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9614258.3A GB9614258D0 (en) 1996-07-06 1996-07-06 A cyclone
GB9614258 1996-07-06

Publications (2)

Publication Number Publication Date
EP0815944A2 true EP0815944A2 (de) 1998-01-07
EP0815944A3 EP0815944A3 (de) 1998-11-18

Family

ID=10796506

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97304879A Withdrawn EP0815944A3 (de) 1996-07-06 1997-07-03 Zyklonabscheider

Country Status (4)

Country Link
EP (1) EP0815944A3 (de)
CA (1) CA2209954A1 (de)
GB (1) GB9614258D0 (de)
NO (1) NO973130L (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB260776A (en) * 1925-11-05 1926-11-11 Wilfred Rothery Wood Improvements in cyclone separators or driers
DE1245267B (de) * 1958-08-22 1967-07-20 Siemens Ag Fliehkraft-Staubabscheidevorrichtung mit einem Zyklon und einem Feinstaub-Nachabscheider in Form eines Drehstroemungswirblers
EP0566432A1 (de) * 1992-04-15 1993-10-20 Elf Aquitaine Production Dreiphasen-Zyklonabscheider
DE9412631U1 (de) * 1994-08-05 1994-10-13 Ltg Lufttechnische Gmbh Zyklon

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB260776A (en) * 1925-11-05 1926-11-11 Wilfred Rothery Wood Improvements in cyclone separators or driers
DE1245267B (de) * 1958-08-22 1967-07-20 Siemens Ag Fliehkraft-Staubabscheidevorrichtung mit einem Zyklon und einem Feinstaub-Nachabscheider in Form eines Drehstroemungswirblers
EP0566432A1 (de) * 1992-04-15 1993-10-20 Elf Aquitaine Production Dreiphasen-Zyklonabscheider
DE9412631U1 (de) * 1994-08-05 1994-10-13 Ltg Lufttechnische Gmbh Zyklon

Also Published As

Publication number Publication date
NO973130D0 (no) 1997-07-04
NO973130L (no) 1998-01-07
GB9614258D0 (en) 1996-09-04
EP0815944A3 (de) 1998-11-18
CA2209954A1 (en) 1998-01-06

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