WO1997005956A1 - Hydrocyclone - Google Patents
Hydrocyclone Download PDFInfo
- Publication number
- WO1997005956A1 WO1997005956A1 PCT/GB1996/001946 GB9601946W WO9705956A1 WO 1997005956 A1 WO1997005956 A1 WO 1997005956A1 GB 9601946 W GB9601946 W GB 9601946W WO 9705956 A1 WO9705956 A1 WO 9705956A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- inlet
- chamber
- mixture
- hydrocyclone
- separating
- Prior art date
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
- B04C5/02—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
-
- 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
Definitions
- the present invention relates to a hydrocyclone for separating a liquid mixture into a more dense and a less dense component
- the hydrocyclone comprising an elongate separating chamber having a wall profile of the kind suitable for separating two liquids, at least one inlet in the sidewall of the chamber adjacent to one end through which inlet or inlets the mixture enters the chamber, the or each inlet being arranged so that the mixture swirls about the longitudinal axis of the chamber, an underflow outlet at the opposite end of the chamber for removal of the more dense component, and an overflow outlet extending through but not projecting from an end wall at the inlet end of the chamber for removal of the less dense component.
- Such a hydrocyclone will hereinafter be referred to as of the kind described. Examples of such a hydrocyclone can be found in GB 2248198, GB 2263077 and GB 2263245.
- the present invention relates to a modification of a hydrocyclone of the kind described in order to increase its capacity.
- the end wall is inclined so that as the mixture from the or each inlet swirls about the axis of the chamber, the end wall imparts to the mixture an axial component of momentum in a direction towards the opposite end.
- the size or number of the hydrocyclones required can be reduced.
- the end wall is substantially in the form of a helix which gradually extends axially towards the underflow outlet end as the circumferential distance away from the or a respective inlet in the direction of swirl of the mixture increases and terminates in a step adjacent to the inlet or the next inlet in the direction of swirl of the mixture.
- the hydrocyclone is configured to remove oil from an oil/water mixture containing predominantly oil, it is preferable for the ratio of the diameter of the overflow outlet to the diameter of the separating chamber adjacent to the inlet to be less than or equal to 0.15, both diameters being measured in a plane perpendicular to the longitudinal axis.
- Fig. 1 shows a section of a hydrocyclone having a single inlet
- Fig. 2 shows the profile of the inlet end wall of a hydrocyclone having two inlets.
- the hydrocyclone shown in Fig. 1 is, in most respects, a standard de-oiling hydrocyclone.
- the hydrocyclone has a separating chamber 1 which is provided at one end with a tangential or involute inlet 2, and at the opposite end with an underflow outlet 3, and gradually tapers from the inlet end to the underflow outlet end.
- the end wall at the inlet end is provided with an overflow outlet 4.
- the liquid mixture entering the separating chamber 1 through the inlet 2 swirls about the longitudinal axis 5 of the hydrocyclone causing centrifugal separation of the liquid mixture, so that a more dense component of the mixture flows out through the underflow outlet 3, while a less dense component flows out through the overflow outlet 4.
- the end wall of the separator adjacent to the inlet 2 has an inclined surface 6 which has a substantially helical configuration.
- the helix is of generally uniform pitch, so that it presents an inclined surface to the incoming mixture.
- the inclined surface 6 terminates at a step 7.
- the extent of the step is such that the mixture which has undergone one complete revolution within the separating chamber 1 is axially below the level of the inlet 2 , so that the two streams do not interfere with one another.
- Fig. 2 illustrates the end wall of a hydrocyclone having two inlets through which flow enters in the direction of the two arrows in Fig. 2.
- Each inlet is associated with a substantially helical surface 6'.
- Each helical surface terminates in a step 1 ' , which ensures that the mixture entering through one inlet does not interfere with that entering through the next inlet.
Abstract
Cet hydrocyclone liquide/liquide dont la paroi d'extrémité, au niveau de l'extrémité d'entrée, est hélicoïdale, est conçu pour imprimer au mélange, à travers l'orifice (2) d'entrée, une constituante axiale d'une énergie cinétique qui soit dirigée vers l'extrémité opposée de l'hydrocyclone.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP96927138A EP0843596A1 (fr) | 1995-08-10 | 1996-08-08 | Hydrocyclone |
NO980558A NO980558L (no) | 1995-08-10 | 1998-02-09 | Hydrosyklon |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9516381.2 | 1995-08-10 | ||
GBGB9516381.2A GB9516381D0 (en) | 1995-08-10 | 1995-08-10 | Hydrocyclone |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997005956A1 true WO1997005956A1 (fr) | 1997-02-20 |
Family
ID=10779029
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1996/001946 WO1997005956A1 (fr) | 1995-08-10 | 1996-08-08 | Hydrocyclone |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0843596A1 (fr) |
GB (1) | GB9516381D0 (fr) |
NO (1) | NO980558L (fr) |
WO (1) | WO1997005956A1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001012334A1 (fr) * | 1999-08-17 | 2001-02-22 | Baker Hughes Limited | Dessableur circulaire |
WO2008085042A1 (fr) | 2007-01-11 | 2008-07-17 | Schinfa Engineering | Dispositif et procédé de séparation d'un mélange de milieu fluide au moyen d'un cyclone |
EP2711082A3 (fr) * | 2012-09-22 | 2018-03-28 | Hydac Process Technology GmbH | Hydrocyclone |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3288300A (en) * | 1962-02-14 | 1966-11-29 | Bauer Bros Co | Centrifugal cleaner |
US3494474A (en) * | 1968-12-26 | 1970-02-10 | Barnes Drill Co | Hydrocyclone separator with vortex starter |
WO1986007548A1 (fr) * | 1985-06-17 | 1986-12-31 | B.W.N. Vortoil Rights Co. Pty. Ltd. | Separateur a cyclone |
GB2248198A (en) * | 1990-08-30 | 1992-04-01 | Conoco Specialty Prod | High efficiency liquid/liquid hydrocyclone |
-
1995
- 1995-08-10 GB GBGB9516381.2A patent/GB9516381D0/en active Pending
-
1996
- 1996-08-08 WO PCT/GB1996/001946 patent/WO1997005956A1/fr not_active Application Discontinuation
- 1996-08-08 EP EP96927138A patent/EP0843596A1/fr not_active Withdrawn
-
1998
- 1998-02-09 NO NO980558A patent/NO980558L/no not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3288300A (en) * | 1962-02-14 | 1966-11-29 | Bauer Bros Co | Centrifugal cleaner |
US3494474A (en) * | 1968-12-26 | 1970-02-10 | Barnes Drill Co | Hydrocyclone separator with vortex starter |
WO1986007548A1 (fr) * | 1985-06-17 | 1986-12-31 | B.W.N. Vortoil Rights Co. Pty. Ltd. | Separateur a cyclone |
GB2248198A (en) * | 1990-08-30 | 1992-04-01 | Conoco Specialty Prod | High efficiency liquid/liquid hydrocyclone |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001012334A1 (fr) * | 1999-08-17 | 2001-02-22 | Baker Hughes Limited | Dessableur circulaire |
AU755383B2 (en) * | 1999-08-17 | 2002-12-12 | Petreco International Limited | Hydrocyclone |
US6743359B1 (en) | 1999-08-17 | 2004-06-01 | Petreco International Ltd. | Hydrocyclone |
WO2008085042A1 (fr) | 2007-01-11 | 2008-07-17 | Schinfa Engineering | Dispositif et procédé de séparation d'un mélange de milieu fluide au moyen d'un cyclone |
US8343360B2 (en) | 2007-01-11 | 2013-01-01 | Advanced Tail-End Oil Company N.V. | Device and method for separating a flowing medium mixture with a stationary cyclone |
EP2711082A3 (fr) * | 2012-09-22 | 2018-03-28 | Hydac Process Technology GmbH | Hydrocyclone |
Also Published As
Publication number | Publication date |
---|---|
NO980558L (no) | 1998-04-08 |
EP0843596A1 (fr) | 1998-05-27 |
GB9516381D0 (en) | 1995-10-11 |
NO980558D0 (no) | 1998-02-09 |
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