EP0777531A1 - Separateur - Google Patents

Separateur

Info

Publication number
EP0777531A1
EP0777531A1 EP95930742A EP95930742A EP0777531A1 EP 0777531 A1 EP0777531 A1 EP 0777531A1 EP 95930742 A EP95930742 A EP 95930742A EP 95930742 A EP95930742 A EP 95930742A EP 0777531 A1 EP0777531 A1 EP 0777531A1
Authority
EP
European Patent Office
Prior art keywords
section
hydrocyclone
flow modifier
tapered
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Withdrawn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
EP95930742A
Other languages
German (de)
English (en)
Inventor
Bjorn Christiansen
Karl Petter Loken
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.)
Fjords Processing AS
Equinor ASA
Original Assignee
Den Norske Stats Oljeselskap AS
Kvaerner Process Systems AS
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 Den Norske Stats Oljeselskap AS, Kvaerner Process Systems AS filed Critical Den Norske Stats Oljeselskap AS
Publication of EP0777531A1 publication Critical patent/EP0777531A1/fr
Withdrawn legal-status Critical Current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
    • B04C5/08—Vortex chamber constructions
    • B04C5/107—Cores; Devices for inducing an air-core in hydrocyclones
    • 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
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/0042—Degasification of liquids modifying the liquid flow
    • B01D19/0052—Degasification of liquids modifying the liquid flow in rotating vessels, vessels containing movable parts or in which centrifugal movement is caused
    • 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
    • B04C5/181—Bulkheads or central bodies in the discharge opening

Definitions

  • the invention concerns a separator device comprising a preferably hollow section having decreasing diameter from the preferably open top towards a closed bottom, or preferably attached to a straight cylindrical tube, which may be closed at the bottom and which is arranged concentrically inside a tapered section of a hydrocyclone, having preferably the same shape as the invention, for separating gas or vapour from a liquid, or alternatively two other fluids with differing densities, i.e. oil/water.
  • the invention can either be attached to the hydrocyclone walls using fixed connections such as stay rods and the like, or the device can be allowed to rotate, either by means of a motor or by arranging turbine blades at the outlet of the invention's tube section.
  • classifiers which have the objective to separate solid particles of different diameters, or different densities, from a continuous liquid- or gas fluid.
  • Classifiers represent actually an integrated two stage cyclone separator.
  • the second stage separation chamber, removing the small/light particles, might at first hand look similar to the invention described in this patent application, i.e. US patent 2,706,045, but it has a completely different function.
  • the main object of the invention is to prevent gas from being entrained in the liquid phase in cases where it is desirable to separate gas and liquid.
  • a secondary object of the device is the ability to impart the gas-free liquid phase a substantial centrifugal field in order to achieve liquid/liquid (e.g. oil/water), or liquid/particle separation.
  • fig. 1 shows a side view of a conventional hydrocyclone containing a device which is according to the invention
  • fig. 2 shows a top view example of how the upper tapered part of the device may be affixed to the hydrocyclone's outer wall
  • fig. 3 illustrates an example how the lower part of the device's tube section may be affixed to the cyclone's tapered outlet section.
  • fig. 4 shows as an example a "cup" formed shape of the device.
  • fig. 5 illustrates a practical arrangement of the invention inside a hydrocyclone for gas/liquid separation when the cyclone liquid outlet is submerged beyond a free liquid surface, i.e. cyclone used as an inlet device inside gravity separators.
  • fig. 6 illustrates another practical arrangement of the invention inside a hydrocyclone for gas/liquid- or liquid/liquid separation where the cyclone body diameter is reduced in two or more sections.
  • the invention is used inside the last tapered section of the cyclone.
  • a "tapered" section means a section decreasing from a large diameter towards a smaller diameter.
  • the shape of the tapered section can be conically, as shown in Fig. 1, or any suitable shape, e.g. as illustrated in Fig. 4.
  • the preferably conically shaped annulus in Fig. 1 (can also have other shapes such as shown in fig. 4) which is formed by the tapered cyclone inner wall 5 and the tapered section of the device 6 will create a back pressure in the flow and thus build up a pressure in the center of the separation chamber 1 allowing the lighter phase (i.e. the gas) to be forced through the vortex finder 4.
  • This backpressure is developed according to the nature law of maintaing rotational momentum.
  • the tangential component of the flow will increase substantially due to the decrease in cross-sectional diameter.
  • the pressure from cross sections A-A to B-B will then decrease proportionally in order to maintain the total energy of the separated denser phase.
  • Fig. 1 shows the highest reccomended axial location of the device 6 where the inlet of the device 6 is at the same axial height as the start of the cyclone's tapered section 5.
  • the lowest reccomended location is determined by the cross- sectional inlet area of the formed annulus, which should preferably be larger than the cross-sectional area of the lower outlet pipe 10 of the cyclone.
  • the tapered inlet section 6 of the device should have a diameter greater than 0.9X the diameter of the cyclone's lower outlet pipe 10, and smaller than 0.99X the diameter of the cylindrical section 1 of the cyclone.
  • a conical section 6 is a preferred geometry of the device, it should be noted that it might have any shape when it is decreased from a large diameter to a smaller diameter.
  • Fig. 5 shows a cup shaped geometry as an example.
  • the preferred attached tube 7 shown in fig. 1 can be removed.
  • Fig. 1 illustrates a hydrocyclone consisting of a cylindrical section 1, a tangential inlet 2, a circular top plate 3 with a through-going pipe 4 for extraction of the gas phase, a section 5 where the cyclone body diameter is decreased from a large diameter to a smaller diameter and preferably a discharge pipe 10 for extraction of the liquid phase.
  • the invention comprises a device which is attached inside the cyclone's tapered section 5 consisting of a tapered section 6, having preferably a conical shape, which might be closed at the bottom or attached to a tube 7.
  • the top of the tapered section 6 should preferably be open, but can be closed with a cylindrical plane plate as well.
  • Fig. 1 illustrates how the invention is attached by stay rods 8 and 9 in a standard hydrocyclone.
  • Fig. 2 illustrates how the invention's tapered section 6 is attached to the hydrocy clone's tapered section 5 with stay rods 8.
  • Fig. 3 illustrates how the invention's tube section 7 is attached to the hydro- cyclone's outlet pipe 10 by stay rods 9.
  • Fig. 4 shows as an example a "cup" formed shape of the device.
  • Fig. 5 illustrates a practical arrangement of the invention inside a hydrocyclone for gas/liquid separation when the cyclone liquid outlet is submerged beyond a free liquid surface 1 1, i.e. the cyclone being used as an inlet device inside gravity separators.
  • Fig. 6 illustrates another practical arrangement of the invention inside a hydrocyclone for gas/liquid- or liquid/liquid separation where the cyclone body diameter is reduced in two or more sections.
  • the invention is used preferably inside the last tapered section of the cyclone.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Cyclones (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Refuse Collection And Transfer (AREA)

Abstract

Afin d'empêcher la pénétration de gaz dans la phase liquide d'un séparateur se présentant sous la forme d'un hydrocyclone, on utilise un dispositif pourvu d'une section d'entrée conique (6), qui peut être creuse ou obturée par une plaque plane cylindrique, fixée à un tube cylindrique droit (7) qui peut être bouché, ou qui traverse les parois latérales ou le fond du cyclone.
EP95930742A 1994-08-31 1995-08-30 Separateur Withdrawn EP0777531A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NO943226A NO180258C (no) 1994-08-31 1994-08-31 Anordning ved separator
PCT/NO1995/000144 WO1996006683A1 (fr) 1994-08-31 1995-08-30 Separateur
NO943226 1995-08-31

Publications (1)

Publication Number Publication Date
EP0777531A1 true EP0777531A1 (fr) 1997-06-11

Family

ID=19897359

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95930742A Withdrawn EP0777531A1 (fr) 1994-08-31 1995-08-30 Separateur

Country Status (5)

Country Link
EP (1) EP0777531A1 (fr)
AU (1) AU3400795A (fr)
CA (1) CA2198697A1 (fr)
NO (1) NO180258C (fr)
WO (1) WO1996006683A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9174223B2 (en) 2011-08-29 2015-11-03 Process Group Pty Ltd Compact separation apparatus

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2603303B1 (fr) 2010-08-11 2019-05-29 FMC Separation Systems, BV Séparateur de phases à haut rendement
CN112691798B (zh) * 2019-10-22 2022-11-15 中国石油化工股份有限公司 一种旋风分离器及其应用方法和一种流化床反应器
JP6948742B1 (ja) * 2021-05-13 2021-10-13 株式会社Ａｍｂｉｔｉｏｕｓ Ｔｅｃｈｎｏｌｏｇｉｅｓ 凝集サイクロン装置、それを用いた海洋プラスチック除去システム及びそのシステムを搭載した船舶並びにその船舶の運航方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2706045A (en) * 1955-04-12 Liquid separation
JPH02501045A (ja) * 1986-11-26 1990-04-12 デラウッド　ピーティーワイ　リミテッド ハイドロサイクロン
DE8807792U1 (de) * 1988-06-15 1988-12-15 Dozent Doppelzyklon-Entstaubungsanlagen GmbH, 4300 Essen Zyklonabscheider
US5071542A (en) * 1989-06-01 1991-12-10 Tuszko Wlodzimierz J Anti-suction cyclone separation method and apparatus
JP2509374B2 (ja) * 1990-07-23 1996-06-19 株式会社クボタ 粉粒体分級装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9606683A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9174223B2 (en) 2011-08-29 2015-11-03 Process Group Pty Ltd Compact separation apparatus

Also Published As

Publication number Publication date
NO943226L (no) 1996-03-01
NO180258C (no) 1997-03-19
WO1996006683A1 (fr) 1996-03-07
AU3400795A (en) 1996-03-22
NO180258B (no) 1996-12-09
CA2198697A1 (fr) 1996-03-07
NO943226D0 (no) 1994-08-31

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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: 19970227

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DK GB IT NL

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

Owner name: DEN NORSKE STATS OLJESELSKAP A.S.

Owner name: KVAERNER PROCESS SYSTEMS A.S.

17Q First examination report despatched

Effective date: 19970825

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19981126