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WO1991018676A1 - Separateur cyclone a plusieurs etages - Google Patents

Separateur cyclone a plusieurs etages Download PDF

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Publication number
WO1991018676A1
WO1991018676A1 PCT/NO1991/000080 NO9100080W WO9118676A1 WO 1991018676 A1 WO1991018676 A1 WO 1991018676A1 NO 9100080 W NO9100080 W NO 9100080W WO 9118676 A1 WO9118676 A1 WO 9118676A1
Authority
WO
WIPO (PCT)
Prior art keywords
chambers
nozzle ducts
cyclone separator
medium
chamber
Prior art date
Application number
PCT/NO1991/000080
Other languages
English (en)
Inventor
Otto Mejlænder MARTENS
Original Assignee
Sinvent 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 Sinvent As filed Critical Sinvent As
Publication of WO1991018676A1 publication Critical patent/WO1991018676A1/fr

Links

Classifications

    • 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
    • B01D19/0047—Atomizing, spraying, trickling
    • 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
    • B04C3/04—Multiple arrangement thereof
    • 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
    • B04C5/26—Multiple arrangement thereof for series flow
    • 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
    • B04C7/00—Apparatus not provided for in group B04C1/00, B04C3/00, or B04C5/00; Multiple arrangements not provided for in one of the groups B04C1/00, B04C3/00, or B04C5/00; Combinations of apparatus covered by two or more of the groups B04C1/00, B04C3/00, or B04C5/00
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G31/00—Refining of hydrocarbon oils, in the absence of hydrogen, by methods not otherwise provided for
    • C10G31/10—Refining of hydrocarbon oils, in the absence of hydrogen, by methods not otherwise provided for with the aid of centrifugal force
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G33/00—Dewatering or demulsification of hydrocarbon oils
    • C10G33/06—Dewatering or demulsification of hydrocarbon oils with mechanical means, e.g. by filtration
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/34—Arrangements for separating materials produced by the well

Definitions

  • the invention comprises a device as stated in the introduction to Claim 1 for stabilizing gas saturated or vapour saturated fluid through combined pressure relief and separation of phases of a media into several pressure stages.
  • the invention is particularly suited for oil and gas separation in the production of petroleum. Other applications may also be relevant.
  • Another principle of separation is based on the application of centrifugal- rather than gravitational forces to separate media with different specific gravities.
  • This principle is used in various constructive designs of centrifuges and cyclones.
  • the medium is subjected to violent rotation meaning that the phase of the medium that has the highest specific gravity, such as water and sand particles are thrown out towards the periphery, whilst the phase that has the lowest specific gravity will be forced against the axis of rotation.
  • the medium in the centrifuge will rotate in a drum, this will normally be at the same rotational velocity as the drum.
  • the medium in a cyclone will rotate in a stationary cylindrical or conical chamber.
  • the main objective of the invention is to produce a device for stabilizing gas saturated fluid through pressure relief and separation of the phases in the media in a more optimal manner than previously.
  • the most important optimal criteria are: small volume, low weight, high separation effect, flexibility with reference to changes in the amount and phase condition of the inflowing medium, lack of sensitivity to movement, mechanical simplicity and functional reliability.
  • the invention is based on the principle stated in Claim 1, which can most easily be described as a cyclone comprising a series of separation chambers with different pressures.
  • the media are separated in each chamber.
  • Stabilized fluid is led out of the last chamber, while gas is led out of each chamber at the respective pressure levels.
  • the fluid part is led further from one chamber to the next chamber where there is a lower pressure level through a set of nozzles located near the periphery.
  • the nozzles can be placed either in dividing walls or in separate ducts that connect two neighbouring chambers on the outside of the container.
  • the means of controlling the level of liquid in each chamber is turning on or off a certain number of nozzles. Pressure relief and flashing occur in the nozzles at the same time as the flow velocity of the medium is accelerated when it proceeds from one pressure level to a lower pressure level.
  • the nozzles are located and designed so that the stream is made to flow in as tangential a direction as possible at the periphery, this will cause the medium to rotate at the inlet to each chamber thereby separating the phases through the influence of centrifugal force.
  • the principles of the function also include a tailored constructive design for multiphase separation.
  • the heaviest phase which, for example, can be water with solid particles can be led out of one or more chambers by separate outlets.
  • the invention is characterized by the pressure energy of the medium being utilized to generate centrifugal forces. This can lead to reduced volume and weight, as each pressure chamber will be considerably smaller and because all pressure stages are integrated in a single unit.
  • the efficiency of the invention is not influenced by motion. Also because of its reduced volume, a unit designed in accordance with the present invention can be designed for higher inflow pressures than large diameter containers.
  • the present invention has considerable advantages in that efficiency levels are maintained even if there are variations in the amount and phase conditions in the inflow medium.
  • This invention is also suitable for a design with multiple pressure stages in one and the same unit, i.e. a higher number of stages than is usually applied.
  • Fig. 1 shows part of a cross section of a cyclone separator designed in accordance with the invention.
  • Fig. 2 shows a perpendicular section on an axial plane along line 1-1 seen from the inflow endto the left in Figure 1.
  • Fig. 3 shows a section along line II-II in Fig. 1 seen facing the dividing wall, and
  • Fig. 4 shows details of a nozzle duct in a dividing wall.
  • Fig. 1 shows a four-stage cyclone separator for processing wellstream from an oil or condensate field.
  • the process consists of wellstream being led at high pressure through a pipe 1 and a tangentially-directed inflow section 2 at one end of a container 10, to the left in Figure 1.
  • the inflow medium is separated into three different outflow media, these are: gas, oil and water possibly with solid particles.
  • the gas phase is led out of the unit with four different pressures through coaxially located outflow pipes, respectively 3, 4, 5 and 6.
  • Stabilized oil is led out from the final chamber, to the right in Figure 1, through pipe spout 7.
  • Water and particles are led out of pipe spouts 8 and 9.
  • Outlet pipes 3, 4, 5 and 6 for gas are connected to their respective separation chambers, 14, 15, 16 and 17.
  • nozzles 18 close to the periphery in each of the dividing walls, these enable the fluid phase to flow through into the next chamber with a lower pressure.
  • the nozzles are located so that the outflow streams in as tangential a direction as possible , as shown in Figure 4.
  • the nozzles or some of them are located with a flap 19 that can be opened and closed, the control mechanism for this is not illustrated in Figure 4.
  • the purpose of opening and closing the nozzles is that this can regulate the level of fluid in each separation chamber when there are variations in the amount and phase conditions of the inflowing stream.
  • the operation is as follows:
  • the inflow stream that can be a mixture of gas, oil, water and solid particles flows at high velocity tangentially to the end of the first chamber 14 through the inflow pipe 1 and the inflow section 2.
  • the medium will then start to rotate because of the high inflow velocity and the circular design of the container 10.
  • the liquid phase is thrown out towards the periphery and the gas phase is forced in towards the centre.
  • the water and particles have the highest specific gravity and lie facing the outer periphery in a tubular layer, with oil in another tubular layer inside this. Controlled drawing off through pipe 9 leads the water and particles out of the container.
  • the gas is removed through pipe 3. Oil, and any possible water that remains, passes through the nozzles 18 in the dividing wall 11 to chamber 15, that maintains a lower pressure than chamber 14.
  • the remaining water is drawn off though outlet 8.
  • the gas pressure in each of the pressure chambers is controlled in a normal manner and adjusted so that the pressure relief gives a rotational velocity that is about the same in each chamber, at the same time as the other optimization criteria are met.
  • the number of chambers can vary, depending on the medium and the capacity requirements.
  • guidepipes can be placed on the outside of the container 10, with tangentially directed inlets and outlets,
  • the flap 19 can also be replaced by another valve mechanism of known principle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Chemical & Material Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Organic Chemistry (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Cyclones (AREA)

Abstract

Séparateur cyclone servant à stabiliser un fluide saturé par du gaz ou par de la vapeur ou un mélange de fluides. On fait passer la phase fluide d'une chambre de séparation (14) à une seconde chambre (15) à pression inférieure par l'intermédiaire d'un ou plusieurs conduits à ajutage (18) disposés dans ou à côté d'une cloison (11) séparant les deux chambres dans un même récipient (10). Les conduits à ajutage sont conçus et disposés de sorte qu'un dégazage ou une effulguration rapides se produisent en même temps que l'accélération du milieu dans lesdits conduits (18). Le flux sortant de ces derniers est orienté de manière quasi tangentielle vers la périphérie du récipient (10). Certains conduits à ajutage (18) peuvent être munis de dispositifs (19) de réduction et de réglage de la section de l'ouverture.
PCT/NO1991/000080 1990-06-07 1991-06-03 Separateur cyclone a plusieurs etages WO1991018676A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO902519 1990-06-07
NO902519A NO170136C (no) 1990-06-07 1990-06-07 Flertrinns syklonseparator.

Publications (1)

Publication Number Publication Date
WO1991018676A1 true WO1991018676A1 (fr) 1991-12-12

Family

ID=19893238

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1991/000080 WO1991018676A1 (fr) 1990-06-07 1991-06-03 Separateur cyclone a plusieurs etages

Country Status (3)

Country Link
AU (1) AU7986591A (fr)
NO (1) NO170136C (fr)
WO (1) WO1991018676A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999043439A1 (fr) * 1998-02-24 1999-09-02 Read Process Engineering A/S Dispositif et procede de separation de fluides
WO2001044118A3 (fr) * 1999-11-30 2002-09-19 Engineering Specialities Inc Dispositif a recipient de traitement mixte

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985000851A1 (fr) * 1983-08-04 1985-02-28 Noel Carroll Systemes de recuperation de petrole

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985000851A1 (fr) * 1983-08-04 1985-02-28 Noel Carroll Systemes de recuperation de petrole

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DERWENT'S ABSTRACT, No. 84-4 385/01; & SU,A,1 000 114, publ. week 8401. *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999043439A1 (fr) * 1998-02-24 1999-09-02 Read Process Engineering A/S Dispositif et procede de separation de fluides
WO2001044118A3 (fr) * 1999-11-30 2002-09-19 Engineering Specialities Inc Dispositif a recipient de traitement mixte

Also Published As

Publication number Publication date
AU7986591A (en) 1991-12-31
NO170136C (no) 1992-09-16
NO902519D0 (no) 1990-06-07
NO170136B (no) 1992-06-09
NO902519L (no) 1991-12-09

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