WO1989002785A1 - Separateur a cyclone dote d'une partie aval courbee - Google Patents
Separateur a cyclone dote d'une partie aval courbee Download PDFInfo
- Publication number
- WO1989002785A1 WO1989002785A1 PCT/AU1988/000384 AU8800384W WO8902785A1 WO 1989002785 A1 WO1989002785 A1 WO 1989002785A1 AU 8800384 W AU8800384 W AU 8800384W WO 8902785 A1 WO8902785 A1 WO 8902785A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cyclone separator
- cyclone
- curved
- inlet
- diameter
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/0217—Separation of non-miscible liquids by centrifugal force
-
- 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
- B04C5/08—Vortex chamber constructions
- B04C5/081—Shapes or dimensions
-
- 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
- B04C5/14—Construction of the underflow ducting; Apex constructions; Discharge arrangements ; discharge through sidewall provided with a few slits or perforations
Definitions
- This invention relates to a cyclone separator with curved downstream portion.
- the invention concerns cyclone separators for separating multi-phase mixtures such as, for example, oil/water mixtures.
- Separators of the present invention may find application in separating a lighter phase of a mixture from a denser phase of a mixture such as oil from water. Such separators are often referred to as “de-oilers”. There are also cyclone separators which are used for removing substantial quantities of the lighter phase from the denser phase and these are often referred to as “de-waterers”.
- Cyclone separators of this type generally comprise an elongated separating chamber having a feed inlet proximate to one end and outlets for the lighter and denser phases.
- these outlets are generally in the form of an overflow outlet at the same end of the separating chamber as the feed inlet and an underflow outlet at the other end.
- the overflow outlet is normally adapted for removing the less dense phase and the underflow outlet for removing the more dense phase.
- the cyclone separator of the present invention comprises elements designed, sized and arranged for treating a mixture of fluids for separating at least in part a more dense component of the mixture from a less dense component thereof, the cyclone separator comprising a separating chamber having first and second ends, inlet means at the first end for introducing feed to be separated into the cyclone separator and at least two outlets, including an underflow outlet at said second end for outflow of the more dense component of the mixture, said separating chamber including a curved portion extending to said underflow outlet whereby the denser component in use passing to the underflow outlet has its path of movement deflected, from the upstream end of the curved portion to the underflow outlet, by a substantial angular displacement.
- the cyclone separator may include a primary portion at the first end, a secondary portion which is co-axial with and adjacent the primary portion and a tertiary portion at the end of the secondary portion remote from the primary portion and co-axial with the secondary portion, at least where it joins the secondary portion.
- the cyclone separator of the present invention is characterised in that the tertiary portion at least is in part curved, and defines said curved portion.
- 2R/d 2 is within the range 10 to 30 and more preferably 18 to 28 where R is the radius of curvature of the curved tertiary portion and d 2 is the nominal diameter of the cyclone separator i.e., the diameter at the downstream end of the primary portion.
- Figure 1 is a schematic side elevation of a typical cyclone separator which is of the general type to which the present invention relates except that the tertiary portion is not curved.
- Figure 2 is a cross-sectional view of the cyclone separator of Figure 1 taken along the axis of the inlet;
- Figures 3, 4, 5, 6 and 7 are various configurations of cyclone separator according to the invention.
- Figure 1 illustrates a typical exemplary of cyclone separator which is modified in accordance with the present invention.
- the cyclone separator comprises a primary portion 1 which includes a generally cylindrical section 6 and a tapered section 7, with a side inlet duct 5 for delivering the mixture to the separating chamber with a tangential flow component.
- the separator further includes a secondary or separating portion 2 which is tapered and a tertiary or downstream portion 3 at the end of the secondary portion remote from the primary portion, this being cylindrical.
- the end of the tertiary portion 3 defines an underflow outlet 12.
- An axial overflow outlet 48 is also provided, positioned either in the end wall of the primary portion or, as shown, at the inner end of an axial vortex finder 4.
- the nominal diameter of the cyclone separator is defined by diameter d 2 and the following geometrical relationships may, for example, apply;
- the inlet duct 5 feeds into a spiral feed channel 8 which in one form may be involute.
- the separating chamber shown has side wall portions which are linear, this is not essential.
- cyclone separators to which the invention is best applicable may be characterised as comprising:
- a vortex finder in the form of an axial tube projecting through the end wall of the separating chamber at the inlet end into the inlet portion and in this case defining at its inner end the overflow outlet.
- d o is the minimum internal diameter of the overflow outlet at the separator end wall if no vortex finder is provided, or where provided, within 3d 2 of the inlet plane or at the vortex finder end if this is not within 3d 2 of the inlet plane
- d 1 is the diameter of the cyclone in the inlet portion where the feed enters, neglecting any inlet channel
- d 2 is the diameter of the cyclone where the inlet portion joins the separation portion, the junction being as hereinafter defined
- d 3 is the diameter of the cyclone where the separation portion ends or joins the downstream portion, the junction being as hereinafter defined
- d ix is twice the radius at which flow enters the cyclone through the x th inlet, (i.e., twice the minimum distance of the tangential component of the inlet centre line from the axis)
- a ix is the cross-sectional area of the x th inlet, as hereinafter defined
- ⁇ is the half angle of convergence of the separation portion as hereinafter defined:
- 1° ⁇ ⁇ ⁇ 3° suitably 1 1/2° ⁇ ⁇ ⁇ 3o, conveniently 2° ⁇ ⁇ ⁇ 3°;
- the inlet plane is defined as the plane perpendicular to the axis of the cyclone at the mean axial position of the weighted areas of the inlets such that the injection of angular momentum into the hydrocyclone is equally distributed axially about it and is thus such that
- Z x is the axial position of the centre line of the x th inlet.
- the inlet plane is designated by reference numeral 8 in Figure 1.
- the junction of the separation portion and the downstream, outlet portion, if present, is defined as the diameter at z 3 where d/d 3 ⁇ 0.98 for all
- a is defined as
- a ix is the minimum cross section of the inlet at entry to the cyclone in a plane parallel to the axis of the cyclone.
- the so provided vortex finder outlet preferably terminates within 3d 2 of the inlet plane, this distance being defined as 1 o .
- the axial overflow outlet i.e., the vortex finder outlet, projects into the cyclone at least as far as the inlet plane.
- S the "swirl coefficient" and designated S, is a reasonable predictor of the ratio of velocities tangentially: axially of flow which has entered the cyclone and which has reached the plane of d 2 .
- each inlet channel is preferably fed from a duct directed substantailly tangentially into the inlet portion.
- Each inlet channel may spiral inwardly in a volute entry.
- the outer surface of the channel may converge to the diameter of the inlet portion d 1 after 360o around the axis, wherein n is n the number of feed channels.
- the inlet channel(s) need not be in a plane normal to the axis and may be offset in a generally helical form. They may attain the diameter d 1 after more than 360° around the axis. n
- the diameter will be approximately d 1 .
- the convergence averaged from the diameter d 1 measured in the inlet plane to the diameter d 2 may have the greatest cone half-angle ⁇ in the cyclone, which may be in the range 5° to 45°.
- the dimensions of the inlet portion should be such that the angular momentum of feed entering from the inlets is substantially conserved into the separation portion.
- the lengths of the portions 1, 2 and 3 are designated 1 1 , 1 2 , 1 3 respectively in Figure 1.
- the generator may be, for example, (i) a monotonic curve (having no points of inflexion) steepest at the inlet-portion end and tending to a cone-angle of zero at its open end, or (ii) a curve with one or more points of inflexion but overall converging towards the downstream outlet portion, preferably never diverging towards the downstream outlet portion.
- the tertiary portion 3 is in accordance with this invention is curved.
- the tertiary portion 3 comprises a straight section of length 1 3 equal to 20d 2 plus a curved section having two parts each having a radius of curvature R.
- the tertiary portion 3 comprises a straight section of length 1 3 equal to 20d 2 , and a curved portion with a radius of curvature R.
- the tertiary portion 3 comprises a curved portion of radius of curvature R.
- FIG. 6 a plurality of relatively reversely oriented curved portions 16, 18, 20, 22, make up an end section 3B of tertiary portion 3, adjacent straight section 3A. Portions 16, 18, 20, 22 are arranged so that such end section 3B is sinuous.
- straight section 3A of the portion 3 cojoins with an end section 3B made up of coiled circular or part circular portions 24, 26.
- each curved portion be part circular or circular, that is exhibit constant curvature such as equal as between portions where there is more than one. This is not essential as the or each curved portion may exhibit varying curvature and/or the curvatures may differ for each. Curved portions may also be interconnected by straight sections.
- each curved portion should be characterised by:
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Geometry (AREA)
- Cyclones (AREA)
Abstract
Séparateur à cyclone doté d'une chambre de séparation comportant une partie primaire (1) munie d'une arrivée latérale (5) et d'une sortie terminale axiale (48), une partie secondaire (2) et une partie tertiaire (3) laquelle (3) est courbée sur une partie de sa longueur, et dans laquelle 10 2R/d2 30 où (R) représente le rayon de courbure de la partie courbée et (d2) représente le diamètre de la chambre de séparation située à l'extrémité aval de la partie primaire (1).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9007160A GB2229656A (en) | 1987-10-01 | 1990-03-30 | Cyclone separator with curved downstream portion |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPI4663 | 1987-10-01 | ||
AUPI466387 | 1987-10-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1989002785A1 true WO1989002785A1 (fr) | 1989-04-06 |
Family
ID=3772483
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU1988/000384 WO1989002785A1 (fr) | 1987-10-01 | 1988-09-30 | Separateur a cyclone dote d'une partie aval courbee |
Country Status (2)
Country | Link |
---|---|
GB (1) | GB2229656A (fr) |
WO (1) | WO1989002785A1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999025454A1 (fr) * | 1997-11-18 | 1999-05-27 | Kvaerner Process Systems A.S. | Separateurs |
US7967975B2 (en) | 1999-12-14 | 2011-06-28 | Petróleo Brasileiro S.A. - Petrobras | Sealing system for cyclone leg |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU1189652A (en) * | 1952-08-11 | 1952-10-16 | Victor Rakowsky | Improvements in or relating tothe separation of mixtures |
DE2051357A1 (en) * | 1970-10-20 | 1972-05-31 | J.M. Voith Gmbh, 7920 Heidenheim | Fibrous suspensions centrifugal separator - with curved coarse material discharge pipe acting as air trap |
US4251368A (en) * | 1978-05-31 | 1981-02-17 | National Research Development Corporation | Cyclone separator |
GB2081691A (en) * | 1980-06-27 | 1982-02-24 | Seitz Werke Gmbh | Recycling of gas used in counterpressure filling of vessels with liquid |
AU8471382A (en) * | 1981-06-25 | 1983-01-06 | Conoco Specialty Products Inc. | Cyclone separator |
AU4675385A (en) * | 1984-08-02 | 1986-03-07 | Conoco Specialty Products Inc. | Cyclone separator |
-
1988
- 1988-09-30 WO PCT/AU1988/000384 patent/WO1989002785A1/fr unknown
-
1990
- 1990-03-30 GB GB9007160A patent/GB2229656A/en not_active Withdrawn
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU1189652A (en) * | 1952-08-11 | 1952-10-16 | Victor Rakowsky | Improvements in or relating tothe separation of mixtures |
AU253354A (en) * | 1954-08-20 | 1955-02-24 | Stamicarbon N. V | Apparatus forand process of concentrating or classifying particles suspended ina liquid |
AU4010558A (en) * | 1958-07-31 | 1959-02-05 | Rakowski Victor | Centrifugal method and apparatus for separating solids. v |
AU4443858A (en) * | 1958-12-19 | 1959-06-25 | Imperial Chemical Industries Limited | Improvements in or relating to cyclones |
DE2051357A1 (en) * | 1970-10-20 | 1972-05-31 | J.M. Voith Gmbh, 7920 Heidenheim | Fibrous suspensions centrifugal separator - with curved coarse material discharge pipe acting as air trap |
US4251368A (en) * | 1978-05-31 | 1981-02-17 | National Research Development Corporation | Cyclone separator |
GB2081691A (en) * | 1980-06-27 | 1982-02-24 | Seitz Werke Gmbh | Recycling of gas used in counterpressure filling of vessels with liquid |
AU8471382A (en) * | 1981-06-25 | 1983-01-06 | Conoco Specialty Products Inc. | Cyclone separator |
AU4675385A (en) * | 1984-08-02 | 1986-03-07 | Conoco Specialty Products Inc. | Cyclone separator |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999025454A1 (fr) * | 1997-11-18 | 1999-05-27 | Kvaerner Process Systems A.S. | Separateurs |
US6409808B1 (en) | 1997-11-18 | 2002-06-25 | Kvaerner Process Systems A.S. | Separators |
US7967975B2 (en) | 1999-12-14 | 2011-06-28 | Petróleo Brasileiro S.A. - Petrobras | Sealing system for cyclone leg |
Also Published As
Publication number | Publication date |
---|---|
GB9007160D0 (en) | 1990-06-20 |
GB2229656A (en) | 1990-10-03 |
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