[go: up one dir, main page]

WO1998011976A1 - Dispositifs de separation de fluides - Google Patents

Dispositifs de separation de fluides Download PDF

Info

Publication number
WO1998011976A1
WO1998011976A1 PCT/GB1997/002501 GB9702501W WO9811976A1 WO 1998011976 A1 WO1998011976 A1 WO 1998011976A1 GB 9702501 W GB9702501 W GB 9702501W WO 9811976 A1 WO9811976 A1 WO 9811976A1
Authority
WO
WIPO (PCT)
Prior art keywords
chamber
axis
settlement
tangential flow
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.)
Ceased
Application number
PCT/GB1997/002501
Other languages
English (en)
Inventor
Patrick Todkill
John Todkill
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AU42158/97A priority Critical patent/AU4215897A/en
Publication of WO1998011976A1 publication Critical patent/WO1998011976A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/2405—Feed mechanisms for settling tanks
    • B01D21/2416—Liquid distributors with a plurality of feed points
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/02—Settling tanks with single outlets for the separated liquid
    • B01D21/08—Settling tanks with single outlets for the separated liquid provided with flocculating compartments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/2405—Feed mechanisms for settling tanks
    • B01D21/2411—Feed mechanisms for settling tanks having a tangential inlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/26—Separation of sediment aided by centrifugal force or centripetal force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/26—Separation of sediment aided by centrifugal force or centripetal force
    • B01D21/267—Separation of sediment aided by centrifugal force or centripetal force by using a cyclone

Definitions

  • the present invention relates to separation devices for separating particulate matter and contaminants from carrier fluids and in particular to those deploying tangential flow separation techniques.
  • a base fluid which is contaminated with particulates is fed tangentially into a pre-charged elongate tube of circular cross-section at an inlet which is situated in the circular wall of the tube.
  • the tangential ingress of the contaminated fluid generates a laminar vortex flow of the fluid within the tube.
  • the laminar vortex flow causes heavy contaminates within the fluid to remain close to the tube wall, with decontaminated fluid found on and near the central axis of the tube.
  • the decontaminated fluid is then drawn off from the central axis of the tube in an upward axial direction by an outlet pipe extending down into the tube on its axis and having an outlet orifice which is orthogonal to the tube.
  • Particulates which have been propelled toward the outer circular wall of the tube may then be extracted by routine removal from the sides of the tube, or by a draw off point at the base of the tube to which heavy particulates will gradually migrate under the influence of gravity.
  • a particular problem with such tangential flow separators is that particle contaminates which are at or close to the central axis of the tube will simply be drawn off into the outlet pipe because the particle energy near the axis is very low.
  • the radially outward (centrifugal) force is therefore correspondingly low and insufficient to convey the particles in a radially outward direction.
  • a further problem with prior art separators is that where fluid flows through the separator are sufficiently high, the flows through the outlet pipe are sufficient to cause a general flow toward the outlet pipe which will carry unwanted particulates toward the outlet, ie. , counteracting any centrifugal force separating the particulates.
  • the present invention improves upon the separation of contaminants from the base fluid by providing a tangential flow separator with a generally extended fluid path length between an inlet and an outlet without extending the distance between the inlet and a particulate collecting zone.
  • the present invention provides a settlement zone in the extended path, between the inlet and the outlet, which settlement zone lies beyond a separation zone lying between the inlet and the particle collection zone.
  • the present invention provides an outlet aperture which draws off decontaminated fluid in a radially inward direction through apertures displaced from the axis of the separator thereby ensuring that outflow of decontaminated fluid is taken only from a zone of the separator in which the fluid has a predetermined minimum angular velocity.
  • the present invention provides a tangential flow separator comprising: a separation chamber defined by a substantially circular outer wall extending along an axis of the chamber between a first end and a second end of the chamber; an inlet adapted to direct fluid into the chamber in a substantially tangential direction; an outlet located at or close to the chamber axis; a settlement chamber surrounding the outlet, having a substantially circular outer wall concentric with the separation chamber outer wall and extending along the axis part way between the first and second ends of the separation chamber.
  • the present invention provides a tangential flow separator comprising: a separation chamber defined by a substantially circular outer wall extending along an axis of the chamber between a first end and a second end of the chamber; an inlet adapted to direct fluid into the chamber in a substantially tangential direction; an outlet comprising a pipe extending into the separation chamber and including at least one orifice which is radially displaced from the central axis of the chamber.
  • the present invention provides a tangential flow separator having an inlet adapted to direct fluid into a separation chamber in a substantially tangential direction, a particulate collection zone in a radially outward portion of the separation chamber, an outlet for drawing off decontaminated fluid from the separator, and a settlement zone lying between the separation zone and the outlet and at least partly separated from the separation zone by an inner wall.
  • Figure 1 shows a schematic diagram of a single ended tangential flow separator including: in figure 1(a), a bottom plan view of a half section of the separator; in figure 1(b), a side cross-sectional view of the separator; and in figure 1(c), a top plan view of the half section of the separator;
  • Figure 2 shows a schematic diagram of a double ended tangential flow separator including: in figure 2(a), a side cross-sectional view of the separator; and in figure 2(b), a top or bottom plan view of the separator;
  • Figure 3 shows a schematic diagram of a single ended tangential flow separator according to an alternative embodiment.
  • the separator 10 comprises a separation chamber 15 which is defined by a circular cylindrical outer wall 20 about the chamber axis 12, the outer wall 20 extending down to conical tapered portion 22 at a first (lower) end of the separation chamber 15, and being open at a second (upper) end of the separation chamber 15.
  • An inlet pipe 25 is connected to an opening in the outer wall 20 towards the upper end of the separation chamber and extends tangentially away from the outer wall.
  • outlet pipe 30 which extends along the axis 12, through the separation chamber 15.
  • the outlet pipe includes one or more outlet orifices 32,33 in the wall of the pipe allowing fluid to pass from the chamber into the outlet pipe 30.
  • a settlement chamber 40 defined by a circular cylindrical inner wall 42, ie. which is concentric with the circular outer wall 20.
  • the inner wall extends down to a tapered portion 44 at a fust (lower) end of the settlement chamber 40 and is open at the second (upper) end of the settlement chamber 40.
  • Fluid is able to pass between the separation chamber 15 and the settlement chamber 40 by way of an aperture 46 in between the lower end of the settlement chamber wall 42 and the outlet pipe 30.
  • the aperture 46 has a cross- sectional area which is greater than the cross-sectional area of the outlet orifices 32,33.
  • the aperture 46 incorporates a flow modifier device 47 which acts as a baffle to fluid passing between the separation chamber 15 and the settlement chamber 40 and generates non-laminar (turbulent) flow into the settlement chamber.
  • a flow modifier device 47 acts as a baffle to fluid passing between the separation chamber 15 and the settlement chamber 40 and generates non-laminar (turbulent) flow into the settlement chamber.
  • Such flow modifiers enhance the performance of the separator, particularly when handling contaminated fluids in which the contaminant has a density similar to that of the carrier medium.
  • the outer wall 20 of the separator 10 also includes a plurality of apertures 26 used to draw off contaminant particulates and/or contaminated medium from the separation chamber 15. These may be coupled to suitable pipes or to a collection vessel in which the entire separator or lower part thereof is incorporated, not shown.
  • contaminated fluid is admitted under pressure to the separator 10 by way of the inlet pipe 25 which causes the fluid to move through the separation chamber 15 in a vortex flow, substantially filling the separator.
  • the settlement chamber 40 also fills with fluid at least up to the level of the outlet pipe orifices 32,33. Normally, this constitutes a pre-charging operation, after which the separator will operate in steady-state condition, ie. full or stable fluid level.
  • the vortex flow of contaminated fluid forces the separation of particulates and other contaminants from the base fluid, the particulates being forced to the outer wall 20 by centrifugal force.
  • Gravitational forces cause the gradual migration of the particulates to the bottom of the separation chamber 15, ie. into the conical end portion 22, where they are continuously extracted via the contaminant outlet apertures 26, as indicated by arrow A on figure 1(b).
  • Contaminants or particulates which are lighter than the fluid medium will tend to collect against the inner wall 42 from where they will gradually rise to the top of the separation chamber 15, as indicated by arrow C. From there, they may be removed by a weir or similar suitable unrestricted outlet.
  • Decontaminated fluid tends to collect at a radially central part of the separation chamber 15 at the input level, and alsoat a radially inward part of the separation chamber lower down ie. where the lighter particulates have floated out, ie. following the first part of arrow B.
  • a flow of decontaminated fluid is set up as indicated by arrow B in figure 1(b).
  • the flow velocity falls owing to the geometry of the lower portion of the settlement chamber and any flow modifier present in the aperture 46. Any contaminant which has failed to be removed from the generally decontaminated fluid will tend to be obstructed from entry into the settlement chamber by the action of the flow modifier at aperture 46, or will tend to settle out in the reduced energy zone of the settlement chamber 40.
  • the occluding of the radially inward portions of the separation chamber 15 by the inner wall 42 is advantageous in minimizing or eliminating any slowly moving fluid from the separation chamber, thereby ensuring that particles within the fluid are effectively moved to the outer wall 20.
  • the geometry of the settlement chamber and the aperture between the separation chamber 15 and the settlement chamber 40 are determined according to the required application of the tangential flow separator. Factors such as the relative density of the carrier fluid to contaminants and flow rates must be taken into account when optimising the design.
  • a separator 100 is similar to that described in connection with figure 1, but includes an upper end portion 52 of the separation chamber 15 which is preferably a mirror image of the lower end portion 22, and an upper end portion 54 of the settlement chamber 40 which is preferably a mirror image of the lower end portion 44.
  • Energized lighter particles or flocks will similarly be accumulated near to the inner wall 42 of the separation chamber 15 where they will rise to the upper end portion 52 to be extracted from the separation chamber via contaminant outlets 56, as indicated by arrows C.
  • Decontaminated fluid will be drawn into the settlement chamber 40 either from below (arrow B,) or from above (arrow B 2 ).
  • floating particulates carried into the settlement chamber 40 will tend to rise out of the chamber through apertures 58.
  • the apex of the upper end portion 52 may be provided with air vents for egress of gaseous material which could otherwise collect there.
  • the settlement chamber forms a quiet zone in which particles will have a low energy. Gravitational forces are therefore able to dominate over those provided by the fluid motion, causing the particulates to either sink out of the settlement chamber or float out of the settlement chamber dependent upon their specific gravity.
  • the embodiment of figure 2 thus has the advantages of enabling efficient removal of both heavy and light contaminants from a carrier fluid within a single piece of apparatus.
  • the dual ended configuration of separator of figure 2 also confers significant advantages with respect to temperature immunity of the system. Because the relative density of the contaminants to the carrier fluid is a function of temperature, a separator design adapted to remove particulates from a lower end of the separation chamber may fail to function correctly as temperatures fall because the density of the carrier fluid increases faster than that of the contaminants. Similar problems may occur in reverse.
  • the dual ended system operates independently of temperature.
  • the separators of figures 1 and 2 may be varied in a number of ways.
  • the outlet pipe may extend in from one end and terminate at a convenient location within the settlement chamber 40.
  • the orifices 32,33 may be of any suitable number, located around the circumference of the outlet pipe 30, or may be a simple single orifice defined by the end of the pipe, ie. facing upward or downward in the plane perpendicular to the axis 12.
  • the orifices may include a mesh filter or the like.
  • the separation and settlement chambers may be differently shaped provided that the appropriate vortex flow around the separation chamber can be achieved.
  • the separator 200 includes a separation chamber 215 and inlet pipe 225 similar to that described in connection with figures 1 and 2.
  • the outlet pipe extends at least part way through the separation chamber along the axis thereof, preferably the full extent of the length of the chamber, as shown in dotted outline.
  • Outlet pipe orifices 232,233 are provided in the circumferential wall of the outlet pipe such that they act to extract fluid from the chamber in a radially inward direction, rather than extracting fluid in an axial direction from a stagnant zone on the axis.
  • the distance of the outlet pipe orifices 232,233 from the axis determines the angular velocity of the fluid at the point of extraction.
  • An important aspect here is that the outlet orifice is provided off the central axis of the separation chamber and thus fluid is not drawn off from a zone in which particles may reside by virtue of the fact that the fluid in that zone has zero or low angular velocity. It will be understood that this could be achieved by an off-axis pipe extending into the separation chamber.
  • removal of the sludge or scum from the bottom or top of the separation chamber through apertures 26, 56 may be effected intermittently or in a continuous mode, dependent upon the application, eg. taking into account the ratio of contaminant to carrier fluid.
  • a continuous negative pressure may be applied to the restricted apertures 26,56 to maintain a minimum velocity of fluid and contaminants out of the apertures 26,56 in order to counteract tendency of particulates to enter the settlement chamber 40.
  • Apertures 26,56 may lead to a further chamber for collection of the contaminants and/or further separation from the carrier fluid.
  • the separators herein described may also operate in a recirculation mode, in which the chambers are always pre-charged with fluid. This is achieved by use of an appropriate feedback loop by which a proportion of decontaminated fluid is recirculated to the input. This ensures that minimum flow velocities are maintained in the separation chamber for all input flows, ensuring correct operation of the settlement zone within the settlement chamber.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Cyclones (AREA)

Abstract

La présente invention se rapporte à un séparateur à écoulement tangentiel permettant de séparer de façon améliorée les contaminants d'un fluide de base au moyen d'une zone de décantation aménagée dans le circuit du fluide, entre une zone de séparation à écoulement tangentiel et la bouche de décharge du fluide décontaminé. Le séparateur comprend une chambre (15) de séparation définie par une paroi extérieure (20) sensiblement circulaire s'étendant le long de l'axe (12) de la chambre entre une première extrémité et une deuxième extrémité de la chambre, une bouche d'admission (25) destinée à diriger le fluide vers la chambre dans une direction sensiblement tangentielle, une bouche de décharge (30) située dans l'axe de la chambre ou à proximité de celui-ci, et une chambre de décantation (40) entourant la bouche de décharge (30), laquelle chambre de décantation comprend une paroi extérieure (42) sensiblement circulaire, concentrique par rapport à la paroi extérieure (20) de la chambre de séparation et s'étendant en partie le long de l'axe (12) entre la première et la deuxième extrémité de la chambre de séparation (15).
PCT/GB1997/002501 1996-09-19 1997-09-17 Dispositifs de separation de fluides Ceased WO1998011976A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU42158/97A AU4215897A (en) 1996-09-19 1997-09-17 Fluid separation devices

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9619599A GB2317351A (en) 1996-09-19 1996-09-19 A tangential flow separator with inner settlement chamber
GB9619599.5 1996-09-19

Publications (1)

Publication Number Publication Date
WO1998011976A1 true WO1998011976A1 (fr) 1998-03-26

Family

ID=10800190

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1997/002501 Ceased WO1998011976A1 (fr) 1996-09-19 1997-09-17 Dispositifs de separation de fluides

Country Status (3)

Country Link
AU (1) AU4215897A (fr)
GB (1) GB2317351A (fr)
WO (1) WO1998011976A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1208897A1 (fr) * 2000-11-21 2002-05-29 Epcon Norge AS Réservoir pour flottation et dégazage combiné
CN114025884A (zh) * 2019-06-27 2022-02-08 巴格知识产权有限公司 用于流体净化装置的螺旋形分离装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113199297A (zh) * 2021-06-16 2021-08-03 嘉兴职业技术学院 一种数控机床加工生产用工件清洗装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3885933A (en) * 1974-09-20 1975-05-27 Stratford Eng Corp Classifying centrifugal separator
US4120673A (en) * 1976-02-19 1978-10-17 Klockner-Humboldt-Deutz Aktiengesellschaft Apparatus for separating gases from liquids
US4834586A (en) * 1986-06-19 1989-05-30 Filter Queen Ltd. Feed and separation device
US5236587A (en) * 1989-05-18 1993-08-17 Josef Keuschnigg Process and apparatus for the separation of materials from a medium
JPH06205917A (ja) * 1993-01-08 1994-07-26 Nkk Corp 気水分離器
JPH06246118A (ja) * 1993-02-26 1994-09-06 Mitsubishi Heavy Ind Ltd 気水分離器

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2443325C3 (de) * 1974-09-06 1980-03-06 Mannesmann Ag, 4000 Duesseldorf Vorrichtung zum kontinuierlichen Abscheiden
GB8713308D0 (en) * 1987-06-06 1987-07-08 Clean Water Co Ltd Separators
GB2223958B (en) * 1988-10-07 1992-12-23 Hydro Int Ltd Separator
GB2233255B (en) * 1989-06-21 1993-07-14 Hydro Int Ltd Separator
GB2241904B (en) * 1990-03-16 1993-12-01 Hydro Int Ltd Separator

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3885933A (en) * 1974-09-20 1975-05-27 Stratford Eng Corp Classifying centrifugal separator
US4120673A (en) * 1976-02-19 1978-10-17 Klockner-Humboldt-Deutz Aktiengesellschaft Apparatus for separating gases from liquids
US4834586A (en) * 1986-06-19 1989-05-30 Filter Queen Ltd. Feed and separation device
US5236587A (en) * 1989-05-18 1993-08-17 Josef Keuschnigg Process and apparatus for the separation of materials from a medium
JPH06205917A (ja) * 1993-01-08 1994-07-26 Nkk Corp 気水分離器
JPH06246118A (ja) * 1993-02-26 1994-09-06 Mitsubishi Heavy Ind Ltd 気水分離器

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 018, no. 562 (C - 1265) 27 October 1994 (1994-10-27) *
PATENT ABSTRACTS OF JAPAN vol. 018, no. 634 (C - 1281) 2 December 1994 (1994-12-02) *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1208897A1 (fr) * 2000-11-21 2002-05-29 Epcon Norge AS Réservoir pour flottation et dégazage combiné
WO2002041965A3 (fr) * 2000-11-21 2003-02-06 Epcon Norge As Reservoir de flottaison et de degazage combines
AU2001294085B2 (en) * 2000-11-21 2005-03-24 Schlumberger Norge As Combined degassing and flotation tank
US7144503B2 (en) 2000-11-21 2006-12-05 M-I Epcon As Combined degassing and flotation tank
US7534354B2 (en) 2000-11-21 2009-05-19 M-I Epcon As Combined degassing and flotation tank
US8119000B2 (en) 2000-11-21 2012-02-21 Schlumberger Norge As Combined degassing and floatation tank
US8440077B2 (en) 2000-11-21 2013-05-14 Schlumberger Norge As Combined degassing and flotation tank
CN114025884A (zh) * 2019-06-27 2022-02-08 巴格知识产权有限公司 用于流体净化装置的螺旋形分离装置
US12179221B2 (en) 2019-06-27 2024-12-31 Paques I.P. B.V. Spiral-shaped separation device for fluid purification device

Also Published As

Publication number Publication date
GB2317351A (en) 1998-03-25
GB9619599D0 (en) 1996-10-30
AU4215897A (en) 1998-04-14

Similar Documents

Publication Publication Date Title
CA2687349C (fr) Separateur de particules a vortex induit
US4857197A (en) Liquid separator with tangential drive fluid introduction
US3529724A (en) Hydrocyclone filter
US4378289A (en) Method and apparatus for centrifugal separation
US3771290A (en) Vortex de-aerator
US3439810A (en) Centrifugal separator
KR890000527B1 (ko) 유체 분리방법 및 사이클론 분리기
EP0046070A2 (fr) Séparateur
US5080792A (en) Apparatus and method for separating fluids
US6767459B1 (en) Fluid processing for separating emulsions
US20130153472A1 (en) Apparatus and method for efficient particle to gas bubble attachment in a slurry
WO1996002309A1 (fr) Appareil et procede multi-etages de separation de fluides immiscibles
US5073266A (en) Apparatus for separating commingling heavier and lighter immiscible
EP0095382A2 (fr) Séparateurs cyclones
US3776385A (en) Hydroclone for simultaneously separating immiscible heavier liquids and solids from a liquid medium
US6544416B2 (en) Systems and methods for separating solids from a fluid environment
EP0566792A1 (fr) Séparateur
US20230302468A1 (en) A compact disc stack cyclone separator
JPH0748791A (ja) 浮選装置
WO1998011976A1 (fr) Dispositifs de separation de fluides
EP1180400A1 (fr) Appareil de séparation par cyclone
WO2000002637A1 (fr) Appareil permettant de separer des fluides immiscibles et procede afferent
US3376977A (en) System for separating solids from an oil-water fluid mixture
EP0069119B1 (fr) Systeme de recuperation de fluides
CA2019390C (fr) Separateur

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE GH HU ID IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV GH

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH KE LS MW SD SZ UG ZW AT BE CH DE DK ES FI FR GB GR IE IT LU MC

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: JP

Ref document number: 1998514389

Format of ref document f/p: F

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: CA