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EP0480921A1 - Separateur cyclone - Google Patents

Separateur cyclone

Info

Publication number
EP0480921A1
EP0480921A1 EP89904741A EP89904741A EP0480921A1 EP 0480921 A1 EP0480921 A1 EP 0480921A1 EP 89904741 A EP89904741 A EP 89904741A EP 89904741 A EP89904741 A EP 89904741A EP 0480921 A1 EP0480921 A1 EP 0480921A1
Authority
EP
European Patent Office
Prior art keywords
cyclone separator
separating chamber
inlet
axis
cyclone
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Withdrawn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
EP89904741A
Other languages
German (de)
English (en)
Other versions
EP0480921A4 (en
Inventor
Noel Carroll
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.)
Lubrizol Specialty Products Inc
Original Assignee
Conoco Specialty Products Inc
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 Conoco Specialty Products Inc filed Critical Conoco Specialty Products Inc
Publication of EP0480921A1 publication Critical patent/EP0480921A1/fr
Publication of EP0480921A4 publication Critical patent/EP0480921A4/en
Withdrawn legal-status Critical Current

Links

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
    • B04C5/24—Multiple arrangement thereof
    • B04C5/30—Recirculation constructions in or with cyclones which accomplish a partial recirculation of the medium, e.g. by means of conduits
    • 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
    • B01D17/0208—Separation of non-miscible liquids by sedimentation
    • B01D17/0214—Separation of non-miscible liquids by sedimentation with removal of one of the phases
    • 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
    • B04C3/00—Apparatus in which the axial direction of the vortex flow following a screw-thread type line remains unchanged ; Devices in which one of the two discharge ducts returns centrally through the vortex chamber, a reverse-flow vortex being prevented by bulkheads in the central discharge duct
    • B04C3/06—Construction of inlets or outlets to the vortex chamber
    • 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

Definitions

  • This invention relates to a cyclone separator.
  • the invention is concerned with a cyclone separator having an axially extending elongate separating chamber with inlet means adjacent a first end thereof, for introducing liquid mixture thereinto with a tangential component of motion so that a less dense component of the mixture tends to form a lengthwise extending central core in the separating chamber, said core being surrounded by a more dense component of the mixture, and wherein the separating chamber is so configured as to in use cause the denser component to flow to a first outlet at a second end of the separating chamber opposite said first end.
  • the invention provides a cyclone separator having an axially extending elongate separating chamber with inlet means adjacent a first end thereof for introducing liquid mixture thereinto with a tangential component of motion so that a less dense component of the mixture tends to form a lengthwise extending central core in the separating chamber, said core being surrounded by a more dense component of the mixture and wherein the separating chamber is so configured as to in use cause the more dense component to flow to a first outlet at a second end of the separating chamber opposite said first end, the separator further including second and third outlets disposed within the separating chamber, the second and third outlets being arranged to receive liquid in use flowing in the separating chamber, in the direction away from said first end, the second outlet being disposed to receive such liquid at a location within the separating chamber close to the axis of the separating chamber, and the third outlet being disposed to receive such liquid so flowing in the separating chamber at a location radially outwardly disposed relative to the radial position of the second outlet
  • a recycling line is preferably provided to provide for flow of liquid from the third outlet back to the separating chamber, such as at said first end thereof.
  • the recycling line may be open to the separating chamber axially at said first end.
  • the separator is preferably characterised by,
  • d. is twice the radius at which flow enters the
  • A. is the projection of the cross sectional area of xth inlet measured at entry to the cyclone separator in a plane parallel to the axis of the cyclone separator which is normal to the plane, also parallel to the cyclone axis which contains the tangential component of the inlet centre line, and where:
  • the separating chamber is of tapered configuration, being tapered over at least a part thereof and possibly over the whole length thereof, exhibiting a taper angle, the "half angle of conicity", being the angle made between a tangent to the separating chamber surface, viewed in axial section, and the separator axis, at the location where the tangent meets the surface.
  • the parameter d is undefined.
  • the chamber possibly with a part adjacent said one end which has substantially zero taper, has a part over which the taper angle varies from a value greater than the predetermined small angle to a value equal to or less than the predetermined small angle d- is defined as the diameter of the chamber at the lengthwise location at which the taper angle first becomes so equal to or less than the predetermined small angle i.e., d_ is the diameter of the chamber measured at the point z 2 w ⁇ ere he condition first applies that:
  • the term d. above may be replaced by a term d, being the diameter of the said separating chamber where flow enters, preferably in an inlet portion at said first end of said separating chamber, (but neglecting any feed channel) .
  • the said portion may be straight sided, or exhibit a variation in taper over its length, such as wherein the aforedescribed taper angle varies from a relatively greater angle at locations towards said larger diameter end of the chamber to a relatively lesser angle at locations towards said smaller diameter end.
  • the tapered portion extends over substantially the whole length of the chamber.
  • the chamber may be provided, adjacent said first end thereof, with an inlet portion into which the or each said inlet extends, the inlet portion being substantially cylindrical.
  • the second and third outlets may conveniently be formed at the ends of ducts coaxially arranged within the separating chamber adjacent the first outlet, such as coaxially therewithin, and extending from the first outlet a predetermined distance towards the first end of the separating chamber.
  • the or each of the second and third outlets may be provided with means for applying a reduced pressure thereat.
  • the separating chamber may include first, second and third coaxially arranged portions arranged in that order from the first end to the second end of the separating chamber, with the inlet means being provided at the first portion. These portions may be of decreasing cross-sectional size, from the first to the second to the third such portion. These portions may be cylindrical, but not necessarily so. They do not need in all cases to present a side surface which is linear in cross-section or which is parallel to the axis of the separating chamber.
  • the first portion may, however, be cylindrical in one embodiment of the invention, and there may also be a frusto-conical section adjacent the first portion and leading to the second portion, and which provides a taper between the largest diameter of the first portion and the diameter of the second portion at the end thereof closest said first end of the separating chamber.
  • the second portion may itself taper over at least part thereof from a larger diameter adjacent the first portion down to a smaller diameter, for example equal to the diameter of the third portion, at the junction of the second portion with the third portion.
  • the second portion may exhibit a constant taper over the whole length.
  • a fourth portion may also be added adjacent the third portion, as described in International application PCT/AU83/00028.
  • Figure 1 is a cutaway perspective view of a cylone separator constructed in accordance with the present invention
  • Figure 2 is a diagrammatic axial section of a further cyclone separator constructed in accordance with the invention.
  • FIG. 3 is a diagrammatic axial section of a still further separator constructed in accordance with the invention.
  • Figure 4 is a section on the line 4-4 in figure 3.
  • the separator 10 shown in figure 1 has a separating chamber 25 in the form of an elongate generally tapered surface of revolution defined about a lengthwise extending axis of the separator.
  • the separating chamber has first second and third portions 12, 14, and 16, coaxially arranged in that order from the first or largest diameter end of the separating chamber, at which portion 12 is located, to the. second or smaller diameter end of the separating chamber, at which end portion 16 is located.
  • These portions are generally similar to corresponding first, second and third portions of the separating chamber of the cyclone separators described in United States patent 4,237,006 and 4,576,724, the disclosures of which are hereby incorporated into the present specification to form and part thereof.
  • the first portion 12 is of generally cylindrical form and has two feed pipes 26, 28 associated therewith, these being arranged to feed tangentially into the portion 12 via respective inlet apertures of which only one aperture, namely aperture 30 associated with pipe 26, is visible in the drawing.
  • the two feed inlet apertures are diametrically arranged one relative to the other and positioned close to the end of portion 12 remote from portion 14.
  • a tapered part 12a of the separating chamber is positioned between the second portion 14 and the portion 12, although such tapered part is not essential.
  • the second portion 14 exhibits a taper over its length, tapering from a diameter, at the end adjacent part 12a, equal to the diameter of part 12a to a somewhat lesser dimension at its opposite end.
  • Portion 16 is of constant diameter, equal to the minimum diameter of portion 14.
  • parameters such as the length ft. of portion 12, its diameter d ⁇ , the taper angle ⁇ of the tapered part 12a (i.e., the half angle of conicity thereof) the length and diameter mXrm , d- of the second portion 14, the taper angle ⁇ of the second portion 14 and the length fi_ and diameter d, of the third portion as well as total area A. of the two feed inlet apertures 30 may all be selected in accordance with parameters mentioned in the aforementioned United States patent specifications, such as follows:
  • a frusto-conical or otherwise shaped portion may be added to the separating chamber 25 at the smaller diameter end of the separating chamber, such as at the remote end of portion 16, but this is not essential.
  • An underflow outlet 23 from the separating chamber 25 is defined at the end of separating chamber portion 16 which is remote from the larger diameter end of the separating chamber.
  • the outer periphery of the duct 56 is radially spaced from the inner peripery of the duct 72, whilst the outer periphery of the duct 72 is radially spaced from the inner periphery of the portion 16 of the separator.
  • the larger diameter duct, duct 72 communicates externally of the separating chamber 25 with a return line or duct 90 which opens to the interior of chamber 25 at an axial inlet 92 in an end wall 44 of the separating chamber at the larger diameter end thereof.
  • the smaller diameter duct 56 extends exterially of the separator, such as through a side wall of the duct 90.
  • a liquid to be separated is admitted tangentially to the interior of portion 12 via the feed pipes 26, 28, the more dense component of the liquid then travelling lengthwise, in spiral fashion, adjacent the peripheral wall of the separating chamber 25 through the separating chamber to emerge from outlet 23.
  • the less dense component tends to form a central tapered core designated by reference numeral 50, this being surrounded by the more dense component, within the chamber 25, this more dense component being designated by reference numeral 52.
  • core 50 is widest at the larger diameter end of the separator and, generally, the flow of the lighter component therewithin is directed axially of the separator in the direction toward the smaller diameter end of the separating chamber.
  • Outlet 54 is designed to receive, and transmit exterially of the separator through duct 56, the less dense component of the liquid mixture within the core 50.
  • the outlet 78 which is of annular form, is designed and sized so as to receive liquid from the interior of the separating chamber at around the location of the boundary between the core 50 and the more dense surrounding liquid component.
  • This liquid may have therewithin a proportion of the more dense component of a liquid mixture which proportion, although somewhat reduced by centrifical action, may not result in the less dense component being as free of the more dense component as is desired.
  • the liquid admitted to duct 72 via outlet 78 is transmitted through ducts 72 and 90 and returned to the separating chamber 25 at the inlet 92, for mixing with the liquid in the separating chamber 25 and for reprocessing within the separating chamber.
  • Figure 2 shows a separator 51 like that in figure 1 save that, here, the duct 56 is connected, at an end exterior to the separating chamber 25, to a positive displacement vacuum pump 36 to apply a reduced pressure to the interior of the duct 56 and thus to the outlet 54, to facilitate flow of less dense component through the duct 56. Liquid so flowing is expressed from the outlet 38 of the pump.
  • the separating chamber 25 is provided with an additional fourth portion 18 at the end of portion 16, in accordance with the teachings with the aforementioned International application PCT/AU83/00028 and, in this instance, the ducts 72 and 56 are positioned within portion 18.
  • an axial overflow outlet opening 32 which communicates with an axial overflow outlet pipe 34.
  • the overflow outlet 32 may receive a certain proportion of the less dense mixture component for direction from core 50 outwardly through pipe 34.
  • Duct 90 is shown in this instance as extending concentrically within pipe 34 and thence axially through opening 32 some distance into the separating chamber. The opening 32 and pipe 34 may however be omitted.
  • FIG 3 a still further, similar, separator 60 is shown wherein pump 36 is provided, in this instance, to provide a reduced pressure within duct 72 and thus at outlet 78.
  • the outlet 38 of the pump 36 communicates via duct 90 with inlet 92.
  • the separator 60 is somewhat modified in that the portion 18 of the separating chamber terminates in a closed wall 18c, with the underflow outlet from the separator being provided as an opening 62 to a tangential outlet duct 64 arranged to receive the helical flow of the liquid in separating chamber 25, rather than being provided as an axial opening 23 as in the case of the separator of figure 1.
  • the helical flow of the more dense liquid flowing within the separating chamber, as applied to the mixture components component in the separator arises because of the tangential positioning of the inlet pipes 26, 28.
  • the described separator comprises three distinct portions 12, 14, 16 as above described, possibly with an additional portion 18 also as described. Further portions may also be added. It is not essential, however that the separator be so characterised. Generally speaking, the separating chamber should principally be characterised in that,
  • d. is twice the radius at which flow enters the cyclone through the inlet (i.e., twice the minimum distance of the tangential component of the inlet centre line from the axis)
  • the parameter d_ is undefined.
  • the chamber possibly with a part adjacent said one end which has substantially zero taper, has a part over which the taper angle varies from a value greater than the predetermined small angle to a value equal to or less than the predetermined small angle, d, is defined as the diameter of the chamber at the lengthwise location at which the taper angle first becomes so equal to or less than the predetermined small angle i.e., d 2 is the diameter of the chamber measured at the point z- where the condition first applies that
  • zx is the axial position of the xth inlet
  • d is the diameter of the said separating chamber where flow enters, preferably in an inlet portion at said one end of said separating chamber, (but neglecting any feed channel) .
  • the said portion may be straight sided, or exhibit a variation in taper over its length, such as wherein the aforedescribed taper angle varies from a relatively greater angle at locations towards said larger diameter end of the chamber to a relatively lesser angle at locations towards said smaller diameter end.
  • the tapered portion extends over substantially the whole length of the chamber.
  • the chamber may be provided, adjacent said larger diameter end thereof, with an inlet portion into which the or each said inlet extends, the inlet portion being substantially cylindrical.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Geometry (AREA)
  • Cyclones (AREA)

Abstract

Le séparateur cyclone décrit (10), qui sert à séparer l'huile et l'eau dans un mélange de ces deux éléments, comprend deux conduits de sortie (54, 78) disposés axialement à l'intérieur de la sortie (23) de l'orifice de sortie (54) pour l'eau pour permettre le retrait de l'huile épurée, l'autre conduit de sortie (78) étant disposé de façon concentrique autour du premier conduit, pour le retrait de l'huile moins épurée. Cette dernière retourne par l'intermédiaire d'un tuyau (90) au séparateur au niveau d'une extrémité placée à proximité adjacente des orifices d'entrée (26, 28), par exemple axialement.
EP19890904741 1988-04-08 1989-04-07 Cyclone separator Withdrawn EP0480921A4 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AUPI763588 1988-04-08
AU7635/88 1988-04-08
AUPJ094388 1988-10-14
AU943/88 1988-10-14

Publications (2)

Publication Number Publication Date
EP0480921A1 true EP0480921A1 (fr) 1992-04-22
EP0480921A4 EP0480921A4 (en) 1992-05-20

Family

ID=25643455

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890904741 Withdrawn EP0480921A4 (en) 1988-04-08 1989-04-07 Cyclone separator

Country Status (4)

Country Link
EP (1) EP0480921A4 (fr)
JP (1) JPH04502421A (fr)
BR (1) BR8906648A (fr)
WO (1) WO1989009653A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9625999D0 (en) * 1996-12-13 1997-01-29 Hesse Wayne W Hydrocyclone
RU2153917C1 (ru) * 1999-12-29 2000-08-10 Леонов Владимир Артемович Влагомаслоотделитель
JP6604601B2 (ja) * 2014-06-05 2019-11-13 永進テクノ株式会社 サイクロン式分離装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1374128A (fr) * 1963-11-12 1964-10-02 Procédé et dispositif de triage de matières fibreuses en suspension dans des séparateurs à tourbillonnement
CA1212648A (fr) * 1981-02-14 1986-10-14 John D. Peel Cyclone separateur a decharge axiale descendante pour fractions legeres
WO1985001454A1 (fr) * 1983-10-06 1985-04-11 Noel Carroll Separateur cyclone
GB8515264D0 (en) * 1985-06-17 1985-07-17 Colman D A Cyclone separator
DE3525485A1 (de) * 1985-07-17 1987-01-29 Voith Gmbh J M Hydrozyklon

Also Published As

Publication number Publication date
JPH04502421A (ja) 1992-05-07
BR8906648A (pt) 1990-11-13
EP0480921A4 (en) 1992-05-20
WO1989009653A1 (fr) 1989-10-19

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Legal Events

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