EP0240486B1 - Separateur a cyclone - Google Patents

Separateur a cyclone Download PDF

Info

Publication number
EP0240486B1
EP0240486B1 EP85903647A EP85903647A EP0240486B1 EP 0240486 B1 EP0240486 B1 EP 0240486B1 EP 85903647 A EP85903647 A EP 85903647A EP 85903647 A EP85903647 A EP 85903647A EP 0240486 B1 EP0240486 B1 EP 0240486B1
Authority
EP
European Patent Office
Prior art keywords
separating chamber
location
tract
vector
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
Application number
EP85903647A
Other languages
German (de)
English (en)
Other versions
EP0240486A1 (fr
EP0240486A4 (fr
Inventor
Gavan James Joseph Prendergast
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
Priority claimed from CA000472531A external-priority patent/CA1269952A/fr
Priority claimed from AU40909/85A external-priority patent/AU4090985A/en
Application filed by Conoco Specialty Products Inc filed Critical Conoco Specialty Products Inc
Priority to AT85903647T priority Critical patent/ATE57315T1/de
Publication of EP0240486A1 publication Critical patent/EP0240486A1/fr
Publication of EP0240486A4 publication Critical patent/EP0240486A4/fr
Application granted granted Critical
Publication of EP0240486B1 publication Critical patent/EP0240486B1/fr
Expired legal-status Critical Current

Links

Images

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
    • B04C5/08—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
    • B04C5/02—Construction of inlets by which the vortex flow is generated, e.g. tangential admission, the fluid flow being forced to follow a downward path by spirally wound bulkheads, or with slightly downwardly-directed tangential admission
    • B04C5/04—Tangential inlets

Definitions

  • This invention relates to a cyclone separator for separating a denser component of a mixture of liquids from a less dense component thereof, said separator being of the kind having an axially extending separating chamber having towards one end inlet means for admission of the mixture with a tangential flow component, the separating chamber having an axially positioned overflow outlet adjacent said one end and said separating chamber being of generally tapered form with a relatively larger cross-sectional size at said one end and a relatively small cross sectional size at an axially positioned underflow outlet at the end of the separating chamber opposite said one end, wherein in use the denser component is directed to the underflow outlet in a fashion such as to encompass an inner axially positioned core of the less dense component which is subjected at least over a substantial part of its length to a pressure differential causing it to flow to the overflow outlet.
  • a cyclone separator is described, for example in AU-B-521 482 (& US-A-4 237 006).
  • a cyclone separator as above described is characterised in that said inlet means is defined by a portion of the separating chamber and at least one inlet tract communicating with said portion, said portion being that portion of the separating chamber which is at the same lengthwise position as the or each that said inlet means is defined by a portion of the separating chamber and at least one inlet tract of involute form communicating with said portion, said portion being that portion of the separating chamber which is at the same lengthwise position as the or each inlet tract, and the or each said tract being of a profiled configuration and defined by vectors T and U.
  • the or each inlet tract presents inner and outer profiles, when viewed axially of the separator, the outer profile extending from a first location at which it meets the circumference of the aforementioned portion of the separating chamber and at least the inward projection of said inner profile extending from a second location at which the inner profile or its said projection meets said circumference, the outer profile being characterised in that a first vector T describing the location of any particular point on said outer profile and contained in a plane normal to said axis, and having its origin at said first location, is such that at the origin an angle 0 between the vector T and that tangent to said circumference which passes through said first location lies within the range of from-0.1 to O radians and, as the magnitude of vector T increases, never decreases substantially, at least for all values of T less than nD, where r I D is as hereinafter defined, the cross-sectional area of the inlet perpendicular to the flow direction contracting in the direction of flow.
  • the inner profile is characterised by a second vector U, describing the location of any particular point on the inner profile and having its point of origin at said second location is such that an angle L between vector U and that tangent to said circumference which passes through said second location is never less than-0.52 radian and, as the magnitude of vector U increases, never decreases substantially at least for all values of vector U less than aD, where aD is as hereinafter defined.
  • an end wall of the separating chamber, through which said overflow outlet communicates with the separating chamber is formed of curved configuration such as being concave or convex when viewed in axial section.
  • the overflow outlet is also preferably in the form of a duct which extends through an end wall of the separating chamber and projects into the separating chamber.
  • the separator 10 comprises a separating chamber 12 having three coaxially arranged separating chamber portions 14, 16, 18. These are of diameters and lengths d l , 1,; d 2 , 1 2 ; and d 3 , 1 3 respectively. Portion 14 is of greater diameter than portion 16 and portion 18 is of lesser diameter than portion 16. A tapered section 17 may be provided between portions 14 and 16. Although the portion 16 shown exhibits a first section of parallel sided form followed by a tapered section, in practice, it is possible to form a portion 16 as having a constant taper over its length.
  • An involute inlet pipe 20 is provided to the separating chamber portion 14, this opening onto a side wall of the separating chamber at an inlet opening 23.
  • An overflow outlet 25 is provided on the axis of the separating chamber portion 14, this leading to an axial overflow pipe 27.
  • the involute inlet pipe 20 spirals around the periphery of the separating chamber portion 14 and exhibits a gradually decreasing cross-sectional area as it approaches the opening 23.
  • the pipe 20 and opening 23 may be of rectangular cross-section.
  • the separator 10 functions generally in accordance with past practice in that the fluid mixture admitted into the separating chamber via the inlet pipe 20 is subjected to centrifugal action causing the separated liquid components to be ejected, on the one hand from the outlet 24 and on the other through the outlet 25.
  • the denser phase material flows to the underflow outlet 24 in an annular cross-sectioned flow around the wall of the separating chamber whilst the lighter phase forms a central core 40 which is subjected to differential pressure action driving the fluid therein out through the overflow outlet 25.
  • the separating chamber 12 is constructed somewhat in accordance with the teachings of patent specification AU-A-47105/79. In that specification the separating chamber is described as having the following dimensional relationships: where A, is the cross-sectional area of the feed inlet, provided by inlet opening 23, d. is the diameter of the overflow outlet 25 and the remaining terms have the meanings ascribed to above. Also, in the specification of Patent Application AU-A-84713/82 a variant construction is described having parameters as above described save for the ratio d o ld 2 which is specified in that case to be less than 0.1. Separators constructed in accordance with this variant form may also be adapted for use in the present invention.
  • the separator of this invention may advantageously be characterised by having the ratio 1 2 /d 2 at least equal to 10. Also, for separators intended for separating relatively small quantities of less dense liquid, such as oil, from relatively larger quantities of more dense liquid such as water, the ratio d l /d 2 may be in the range 1.5 to 3.0, such as 2.0.
  • the inlet means of the separator is shown as comprising an inlet tract 80 together with a portion of the separating chamber of the separator which is lengthwise adjacent thereto.
  • the separator shown in Figure 1 is described as having three distinct portions of successively decreasing diameters, it is not essential that the separator be so formed as it could, for example, exhibit any generally tapered configuration extending from a larger diameter end adjacent the overflow outlet to a smaller cross-section end adjacent the underflow outlet.
  • the tract 80 is shown as having an outer profile 82 and an inner profile 84.
  • the diameter D of the cyclone separator as shown in Figure 6 corresponds to the diameter d, in Figure 1, since the inlet tract 80 (as in the case of the Figure 1 construction) communicates with separating chamber at the larger diameter end thereof.
  • the tract 80 is considered as extending from a location indicated generally by reference numeral 85 inwardly towards the separating chamber.
  • the location 85 is defined as a point beyond which, reckoned in the direction inwardly towards the separating chamber the flow of inlet liquid cannot be described by the simple flow equations.
  • the points 83, 87 on the outer and inner profiles aligned with location 85 are points where, if the profiles were projected outwardly therefrom in parallel relationship the separator would operate substantially the same as if the profiles were continued in the profiled configurations defined in accordance with this invention.
  • outwardly projected is meant a projection from the respective profile which is substantially tangential at the point of meeting the respective profile.
  • Point 83 will in fact be very much further round the outer profile than shown in the drawings in order that this requirement can be met. From the respective points 83, 87 on the outer and inner profiles respectively the profiles extend in spiral fashion inwardly to meet the circumferential surface 86 of the separating chamber. Locations at which the profiles so meet circumferences 86 are designated respectively by letters "C” and "E". Practically, although the profile 84 is shown as joining circumference 86 by continuance of the profile inwardly until it meets the circumference 86 at the point "E", for mechanical reasons it is frequently simpler and more effective to round the junction between the profile 84 and the circumference 86 by providing a rounded portion 84a (indicated by broken lines).
  • the outer profile 82 is such that vector T describing the location of any particular point on outer profile and contained in a plane normal to said axis, and having its origin at location "C", is such that an angle 8 between the vector T and a tangent 92 to circumference 86 passing through said location "C" at the origin lies in the range of -0.1 to 0 radians and, as the magnitude of vector T increases, never decreases substantially for all the magnitudes of T less than Dn, where D ⁇ is the length of the outer profile 82 of the inlet tract, viewed axially of the separating chamber, D being the diameter of the portion of the separating chamber at which circumference 86 prevails.
  • This profile length is that extending between points "C" and 83.
  • a vector U describing the location of any particular point on the inner profile 84 and having its point of origin at location "E” is such that the angle L between vector U and the tangent 93 to said circumference which passes through said location "E” is never less than negative 0.52 radians and, as the magnitude of vector U increases, never decreases for all magnitudes of vector U less than aD, at least for substantial magnitudes of vector U, where aD is the length of the inner profile 84, viewed axially of the separating chamber. This profile length is that extending between points "E” and 87.
  • substantial magnitude of vector U we mean that in the vicinity of the location "E", vector U may not be defined because of possible rounding of the inner profile as previously described.
  • the cross-sectional area A, of the tract 80 measured in a radial and axial plane passing through the location where the inner profile 84 actually terminates is preferably defined as:
  • the angle measured about the axis of the separator between the points "C” and “E” was 86°.
  • the inner profile 84 was terminated by a curved portion 84a co-joining with circumference 86, this portion had a curvature of approximately 0.5 mm and located some 110° around the axis of the separator from the point "C".
  • the tract 80 may have a rectangular transverse cross-section such as having longer sides extending parallel to the axis of the separator and of length W and shorter sides contained in planes normal to the axis of the separator and of length t. In this case the following relationships may prevail and Generally, W will be greater than t.
  • Figure 8 shows a further modification of the separator in accordance with the invention where the inlet tract 80 is shown as extending with its mean flow path 93 for liquid flowing therein as being at an angle to the axis 95 of the separator rather than being normal thereto as illustrated in Figure 1.
  • the axis 93 of tract 80 makes an angle to axis in the range
  • the tract is of rectangular cross-section it is preferred that it be of such rectangular cross-section at least over a length qD where q is less than a.
  • the described separator inlet configuration may readily be employed where more than one tract 80 is provided.
  • the described separator has been found to provide excellent operating characteristics when separating smaller quantities of oil from larger quantities of water.
  • Figure 3 shows a modification of the separator of Figure 1.
  • the end wall 50 of the separating chamber portion 14, adjacent overflow outlet 25, is formed of concave form.
  • the end wall 50 is shown in a further modification as exhibiting a convex form when viewed in axial section.
  • Figure 5 shows a still further modification where the overflow inlet 25 is formed from a pipe 27 having a portion 27a which extends through wall 50 (in this case, shown as being linear in axial section) and into the separating chamber 14 a short distance.
  • involute is used in this specification to describe a curve being the locus of the end of a piece of string uncoiled from a base circle.
  • the inner and outer profiles of the or each inlet tract as described are generally formed as involute curves. Each profile may however, have conjoining sections defined by cojoining involute curves having respective defining base circles of differing diameters, or the projected start points on the respective base circles may be relatively circumferentially spaced.

Landscapes

  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Fluid Mechanics (AREA)
  • Cyclones (AREA)

Abstract

Séparateur à cyclone (10) possédant une entrée avec des profilés intérieur et extérieur (84, 82), vus en coupe transversalement par rapport à l'axe du séparateur. Cet emplacement de tout point particulier sur le profilé extérieur (82) est défini par un vecteur contenu dans un plan perpendiculaire à l'axe du séparateur, et ayant son origine à un emplacement (C) où le profilé extérieur rencontre la circonférence intérieure adjacente (86) du séparateur. A mesure que la grandeur du vecteur (T) augmente, un angle compris entre le vecteur (T) et une tangente (92) à la circonférence (C) qui passe par l'emplacement (C) ne diminue jamais et ne devient jamais inférieur à 0,1 radian négatif. L'emplacement de tout point particulier sur le profilé intérieur (84) est défini par un vecteur (U) ayant son point départ à un emplacement (E) où le profilé intérieur ou au moins sa projection rencontre la circonférence (86) du séparateur. A mesure que la grandeur du vecteur (u) s'accroît, un angle zeta compris entre le vecteur (U) et une tangente (93) à la circonférence (86) qui passe par l'emplacement (E) ne diminue jamais et ne devient jamais inférieur à 0,52 radian négatif, au moins pour des grandeurs substantielles du vecteur (U).

Claims (13)

1. Séparateur à cyclone destiné à séparer un constituant relativement dense d'un mélange de liquides d'un constituant moins dense du mélange, le séparateur étant d'un type ayant une chambre axiale de séparation (12) munie, vers une extrémité, d'un dispositif d'entrée (20) destiné à l'admission du mélange avec une composante tangentielle, la chambre de séparation (12) ayant une sortie axiale de débordement (25) qui est adjacente à la première extrémité, la chambre de séparation (12) ayant une forme évasée de façon générale de section relativement grande à la première extrémité et de section relativement plus faible à une sortie inférieure axiale (24) placée à l'extrémité de la chambre de séparation (12) qui est opposée à la première extrémité, afin que, pendant l'utilisation, le constituant relativement lourd soit dirigé vers la sortie inférieure (24) d'une manière telle qu'il entoure une âme interne axiale du constituant moins dense qui est soumise, au moins sur une partie importante de sa longueur, à une pression différentielle provoquant son écoulement vers la sortie de débordement (25), caractérisé en ce que le dispositif d'entrée (20) est délimité par une partie de la chambre de séparation (12) et au moins une région d'entrée (80) ayant une forme en développante communique avec cette partie, cette partie étant la partie de la chambre de séparation qui se trouve à la même position longitudinale que la région ou chaque région d'entrée (80), la région ou chaque région d'entrée (80) ayant des profils interne et externe (84, 82), en vue suivant l'axe du séparateur, le profil externe (82) partant d'un premier emplacement (C) auquel il se raccorde à la circonférence (86) de ladite partie de la chambre de séparation (12), et la projection vers l'intérieur au moins du profil interne (84) partant d'un second emplacement (E) auquel le profil interne (84) ou sa projection se raccorde à la circonférence (86), le profil externe (82) étant en outre caractérisé en ce que:
un premier vecteur T décrivant l'emplacement d'un point particulier quelconque placé sur le profil externe (82) et contenu dans un plan perpendiculaire à l'axe, le vecteur ayant son origine au premier emplacement (C), est tel que, à l'origine, l'angle 8 formé par le vecteur T et la tangente à la circonférence (86) qui passe par le premier emplacement (C) est compris entre -0,1 et 0 radian, et, lorsque la dimension du vecteur T augmente, l'angle ne diminue jamais notablement pour toutes les dimensions du vecteur T inférieures à nD,
D étant le diamètre de ladite partie de la chambre de séparation (12), et
nD étant la longueur du profil externe (82) de la région d'entrée (80) en vue suivant l'axe de la chambre de séparation (12) et étant mesurée à partir du premier emplacement (C) auquel le profil externe (82) se raccorde à la circonférence (86),
la section de la région d'entrée (80) perpendiculaire à la direction d'écoulement diminuant de façon générale dans la direction d'écoulement.
2. Séparateur à cyclone selon la revendication 1, dans lequel un second vecteur U qui décrit l'emplacement d'un point particulier quelconque placé sur le profil interne (84) et ayant son origine au second emplacement (E) est tel qu'un angle L formé par le vecteur U et la tangente à la circonférence (86) qui passe par le second emplacement (E) n'est jamais inférieur à -0,52 radian et, lorsque la dimension du vecteur U augmente, ne diminue jamais pour toutes les dimensions du vecteur U qui sont inférieures à aD,
aD étant la longueur du profil interne (84) de la région d'entrée (80) en vue suivant l'axe de la chambre de séparation (12), et étant mesurée à partir du second emplacement (E) auquel une projection vers l'intérieur au moins du profil interne (84) se raccorde à la circonférence (86).
3. Séparateur à cyclone selon la revendication 1 ou 2, dans lequel:
Figure imgb0032
A, étant la section de la région (80) ou la section combinée de toutes les régions (80), lorsque plusieurs régions (80) sont présentes, la section ou chaque section étant mesurée dans un plan sensiblement perpendiculaire au courant d'entrée dans la région et recoupant le point de terminaison du profil interne (84).
4. Séparateur à cyclone selon l'une quelconque des revendications 1 à 3, caractérisé en ce que:
Figure imgb0033
et
Figure imgb0034
5. Séparateur à cyclone selon l'une quelconque des revendications 1 à 4, dans lequel la région ou chaque région d'entrée (80) a une section rectangulaire sur au moins une longueur qD telle que q<a, la section ayant au moins une longueur W" et une largeur tn telles que
Figure imgb0035
et
Figure imgb0036
W" étant la longueur de la section de la nlème région (80) et tn étant la largeur de la nième région (80).
6. Séparateur à cyclone selon la revendication 5, dans lequel les côtés de la section ou de chaque section de longueur W sont alignés de façon générale dans la direction axiale du séparateur, et les côtés de largeur t sont alignés de façon générale en direction perpendiculaire à l'axe du séparateur (12).
7. Séparateur à cyclone selon la revendication 5 ou 6, dans lequel W>t.
8. Séparateur à cyclone selon l'une quelconque des revendications 1 à 7, dans lequel la région ou chaque région (80) est disposée suivant un angle respectif formé avec l'axe du séparateur, en vue perpendiculaire à l'axe, l'angle respectif p, formé entre l'axe et la direction moyenne du courant d'entrée de mélange de liquides lorsqu'il est admis par la région respective d'entrée (80), au point auquel le trajet moyen d'écoulement recoupe la section de la région respective pour laquelle la section A est mesurée, est tel que:
Figure imgb0037
l'angle p étant défini afin que, pour des valeurs inférieures à 90°, l'écoulement du liquide dans la chambre de séparation pendant l'utilisation, le long du trajet de circulation, possède une composante qui est dirigée de l'extrémité de plus grand diamètre vers l'extrémité de plus petit diamètre de la chambre de séparation (12).
9. Séparateur à cyclone selon l'une quelconque des revendications 1 à 8, dans lequel la paroi d'extrémité (50) de la chambre de séparation (12), par laquelle la sortie de débordement (25) communique avec la chambre de séparation, (12) est formée avec une configuration courbe.
10. Séparateur à cyclone selon la revendication 8, dans lequel la paroi d'extrémité (50) est concave.
11. Séparateur à cyclone selon la revendication 9, dans lequel la paroi d'extrémité (50) est convexe.
12. Séparateur à cyclone selon l'une quelconque des revendications 1 à 11, dans lequel la sortie de débordement (25) est sous forme d'une tuyauterie (27) qui traverse la paroi d'extrémité (50) de la chambre de séparation (12) et dépasse dans cette chambre.
13. Séparateur à cyclone selon l'une quelconque des revendications 1 à 12, ayant une seule région d'entrée (80).
EP85903647A 1985-01-22 1985-07-23 Separateur a cyclone Expired EP0240486B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85903647T ATE57315T1 (de) 1985-01-22 1985-07-23 Zyklonabscheider.

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
CA000472531A CA1269952A (fr) 1984-01-24 1985-01-22 Separateur de type cyclone
PH3175485 1985-01-22
PH3175485 1985-01-22
CA472531 1985-01-22
AU40909/85 1985-04-04
AU40909/85A AU4090985A (en) 1985-04-04 1985-04-04 Cyclone separator

Publications (3)

Publication Number Publication Date
EP0240486A1 EP0240486A1 (fr) 1987-10-14
EP0240486A4 EP0240486A4 (fr) 1988-03-21
EP0240486B1 true EP0240486B1 (fr) 1990-10-10

Family

ID=27154041

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85903647A Expired EP0240486B1 (fr) 1985-01-22 1985-07-23 Separateur a cyclone

Country Status (8)

Country Link
EP (1) EP0240486B1 (fr)
BR (1) BR8507311A (fr)
DE (1) DE3580112D1 (fr)
DK (1) DK164491C (fr)
GB (1) GB2191720B (fr)
IT (1) IT1212056B (fr)
NL (1) NL8520210A (fr)
WO (1) WO1986004271A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5139652A (en) * 1990-12-31 1992-08-18 A. Ahlstrom Corporation Centrifugal cleaner
FR2788453B1 (fr) * 1999-01-18 2001-02-23 Alstom Gaine d'entree de fumees dans un separateur cyclone

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB315007A (en) * 1928-01-05 1929-07-05 Thomas Morgan Barlow Improvements in or relating to steam separators
DE681033C (de) * 1937-06-29 1939-09-13 Theodor Froehlich A G Fliehkraftstaubabscheider
GB535886A (en) * 1940-06-28 1941-04-24 Buell Comb Company Ltd Improvements in cyclone dust separators
DE1090940B (de) * 1954-07-30 1960-10-13 Reinhold Kamps Dipl Ing Dr Fliehkraftstaubabscheider mit einem oder mehreren in einem Gehaeuse angeordneten Zyklonen, insbesondere fuer Krackanlagen
US3091334A (en) * 1959-07-20 1963-05-28 Denver Equip Co Centrifugal separation method and means
CH385170A (de) * 1960-07-06 1964-12-15 Fetzer Erich Dipl Ing Verfahren zum Aufbereiten von Flüssigkeiten und Hydrozyklon zur Durchführung dieses Verfahrens
US3306461A (en) * 1964-08-18 1967-02-28 Int Minerals & Chem Corp Hydrocyclone
DE2038045C3 (de) * 1970-07-31 1981-12-10 Siemens AG, 1000 Berlin und 8000 München Zyklon
HU165483B (fr) * 1970-12-04 1974-09-28
US3745752A (en) * 1970-12-30 1973-07-17 Envirotech Corp Fluid inlet structure for cyclone collectors
US3953184A (en) * 1974-09-18 1976-04-27 Stockford William F Cyclone-type dust separator
SU827181A1 (ru) * 1979-01-03 1981-05-07 Makhortov Anatolij V Циклон дл очистки потока газа отпыли

Also Published As

Publication number Publication date
EP0240486A1 (fr) 1987-10-14
WO1986004271A1 (fr) 1986-07-31
BR8507311A (pt) 1987-12-01
DK448886A (da) 1986-09-19
DK448886D0 (da) 1986-09-19
EP0240486A4 (fr) 1988-03-21
DK164491B (da) 1992-07-06
DE3580112D1 (de) 1990-11-15
IT1212056B (it) 1989-11-08
GB8716797D0 (en) 1987-08-19
GB2191720A (en) 1987-12-23
IT8548392A0 (it) 1985-07-23
NL8520210A (nl) 1987-10-01
DK164491C (da) 1992-11-23
GB2191720B (en) 1989-06-07

Similar Documents

Publication Publication Date Title
US4710299A (en) Cyclone separator
US3947364A (en) Apparatus for removing particles from fluid
US5017288A (en) Cyclone separator
US4810382A (en) Cyclone separator
WO1987005234A1 (fr) Separateur a cyclone
US5108608A (en) Cyclone separator with multiple outlets and recycling line means
WO1989007490A1 (fr) Separation de liquides
AU755383B2 (en) Hydrocyclone
US5049277A (en) Cyclone separator
EP0203065B1 (fr) Separateur cyclonique
EP0240486B1 (fr) Separateur a cyclone
GB2263652A (en) Hydrocyclone
US4976872A (en) Cyclone separator
SK279559B6 (sk) Ponorná rúrka zariadenia na oddeľovanie aspoň jedn
AU620437B2 (en) Cyclone separator
WO1989009653A1 (fr) Separateur cyclone
AU629992B2 (en) Cyclone separator
JPS62501685A (ja) サイクロン分離器
EP0843596A1 (fr) Hydrocyclone
SU1018694A1 (ru) Сепаратор
WO1989002785A1 (fr) Separateur a cyclone dote d&#39;une partie aval courbee
NO172629B (no) Syklonseparator

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19870721

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR IT LI LU NL SE

A4 Supplementary search report drawn up and despatched

Effective date: 19880321

17Q First examination report despatched

Effective date: 19880712

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: CONOCO SPECIALTY PRODUCTS INC.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR IT LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19901010

Ref country code: LI

Effective date: 19901010

Ref country code: CH

Effective date: 19901010

Ref country code: AT

Effective date: 19901010

REF Corresponds to:

Ref document number: 57315

Country of ref document: AT

Date of ref document: 19901015

Kind code of ref document: T

ITF It: translation for a ep patent filed

Owner name: JACOBACCI & PERANI S.P.A.

ET Fr: translation filed
REF Corresponds to:

Ref document number: 3580112

Country of ref document: DE

Date of ref document: 19901115

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19910731

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19920812

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19930706

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19930728

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19930731

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19930731

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19930922

BERE Be: lapsed

Owner name: CONOCO SPECIALTY PRODUCTS INC.

Effective date: 19930731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19950201

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19950331

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST