EP0554937B1 - Flüssigkeitsringpumpe - Google Patents

Flüssigkeitsringpumpe Download PDF

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Publication number
EP0554937B1
EP0554937B1 EP93200193A EP93200193A EP0554937B1 EP 0554937 B1 EP0554937 B1 EP 0554937B1 EP 93200193 A EP93200193 A EP 93200193A EP 93200193 A EP93200193 A EP 93200193A EP 0554937 B1 EP0554937 B1 EP 0554937B1
Authority
EP
European Patent Office
Prior art keywords
phase
liquid
casing
axis
fluid
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 - Lifetime
Application number
EP93200193A
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English (en)
French (fr)
Other versions
EP0554937A1 (de
Inventor
Alberto Dalla Rosa
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.)
Tecnomare SpA
Original Assignee
Tecnomare SpA
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Filing date
Publication date
Application filed by Tecnomare SpA filed Critical Tecnomare SpA
Publication of EP0554937A1 publication Critical patent/EP0554937A1/de
Application granted granted Critical
Publication of EP0554937B1 publication Critical patent/EP0554937B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C7/00—Rotary-piston machines or pumps with fluid ring or the like

Definitions

  • This invention relates to a new multi-phase pumping device which, by compressing the gas and simultaneously pumping the liquid by means of separate operations, enables any multi-phase fluid with any gas content to be effectively pumped in a simple, automatic and reliable manner with high efficiency.
  • the known purpose of a multi-phase pumping device is to increase the pressure of a multi-phase fluid to enable it to overcome considerable level differences and/or to travel through long distances in pipelines, as is currently required for example in the petroleum sector where the depletion of the available reserves in the major reservoirs has resulted in attention being turned towards reservoirs which are smaller and/or further from already existing process installations and/or located under deep water, in which the pressure is generally insufficient to effectively convey the two-phase fluid at an acceptable throughput through pipelines of reasonable dimensions for a production period of reasonable length.
  • a determined gas flow is conveyed within the pipeline connecting the reservoir to the well head and mixes with the reservoir fluid to reduce its average density, so facilitating the outflow of said fluid from the wells.
  • This method has however a series of drawbacks in that it requires the presence of a compression unit, a pipeline dedicated to the transport of the gas and finally the equipping of existing wells with gas injection devices. Again, the addition of gas to the reservoir fluid can result in the deleterious formation of gas bubbles and liquid pockets along the transport pipeline and in the possible riser used to connect the transport pipeline to a process installation, platform or the like.
  • a second known system consists of installing a specific liquid pumping device at the bottom of the well, utilizing the fact that at this point the reservoir fluid has a mainly liquid composition as a consequence of the high reservoir pressure.
  • This latter system is thermodynamically efficient but unfortunately requires energy to be continuously fed to a most difficult position for powering the pump located at the bottom of the well.
  • the pumping unit such a system, being very sensitive to the presence of gas and sand or solid particulate matter in general, is of limited operational life and requires frequent maintenance and/or repair, as has been found in practice.
  • Another known system uses a two-phase gas-liquid separator installed in the vicinity of a well head plus a pumping unit for operating on the liquid flow leaving the separator, whereas the gas leaving the separator, being a fluid of low density and viscosity and therefore undergoing only low pressure drop during transport, can be fed directly into a separate pipeline to the side of the liquid pipeline if the distance to be transported is not too great.
  • the gas leaving the separator must also be compressed by a suitable compressor unit, in which case it can be re-mixed with the previously pumped liquid and the resultant fluid fed through a single pipeline.
  • This latter system also suffers from installation and cost drawbacks as it requires the use of a separator, a pumping unit for the liquid and a compression unit for the gas, or alternatively a separate pipeline through which to feed the gas.
  • a multi-phase pumping device is used able to generate the necessary pressure increase, which can be considerable, for the required fluid flow.
  • the volumetric gas fraction contained in the fluid in that for volumetric fractions of between 30 and 80% the device has to be based on the principle of operation of liquid pumps, whereas for fractions exceeding 95% it has to be based on the principle of operation of wet gas compressors. From this, it is apparent that there are currently no devices able to operate with any gas content and hence able to operate under particular flow conditions, such as when the fluid stream conveys long gas bubbles alternating with pockets of liquid.
  • the pumping devices currently known in the art or under study represent adaptations of known machine types such as multi-stage centrifugal compressors or screw pumps which when operating with a two-phase fluid have an efficiency of the order of 30-40%, hence involving the delivery and the continuous consumption of considerable quantities of energy.
  • CH-A-228732 discloses a liquid ring pump for simultaneously pumping a gaseous and a liquid fluid by mixing them in adjustable proportion and then pumping the resulting mixture in a sole liquid ring pump giving separate streams of liquid and gaseous phase alone.
  • the object of the present invention is to obviate the aforesaid drawbacks by providing a multi-phase pumping device which allows effective pumping of any multi-phase fluid of any gas content in a simple and reliable manner without the need for additional equipment, and with high efficiency and hence low energy consumption.
  • the liquid part of the fluid to be pumped forms, concentric with the axis of said casing, a liquid ring which by rotating rigidly with said blades forms a peripheral seal for the gas of said fluid contained in the spaces between said blades, the volume of these spaces decreasing progressively from the intake pipe to the gas delivery pipe, so that the gas undergoes compression.
  • the liquid and gas delivery pipes are provided with suitable valves able to automatically close the pipes at certain pressures.
  • the pumping device for a multi-phase fluid comprising a disc casing on the inner periphery of which there is provided a tube of Pitot tube type connected to a delivery pipe, an intake pipe for said multi-phase fluid being connected to said casing in correspondence with the axis of this latter, is characterised according to the present invention in that said casing, of toroidal peripheral profile, is fixed and within it there is rotated by a motor a bladed impeller mounted eccentrically to said casing axis, in a position approximately diametrically opposite said Pitot tube, a second delivery pipe being provided in that casing region opposite said intake pipe about the plane containing both the axis of said casing and the axis of said impeller and in proximity to this latter axis, the two said delivery pipes each being provided with an automatic valve.
  • the reference numeral 1 indicates the disc casing of the multi-phase pumping device.
  • Said casing 1 is fixed on supports 2 and 3 and has a toroidal peripheral profile 4.
  • a tube orientated with its cross-section approximately perpendicular to the direction of circulation of the liquid part 22 of the multi-phase fluid to be pumped, and hence substantially a Pitot tube 5, which is connected to a delivery pipe 6 provided with an automatic valve 7, there being connected to the disc casing 1 in proximity to its axis 10 a multi-phase fluid intake pipe 8, also provided with an automatic valve 9.
  • a bladed impeller 11 is mounted eccentrically to said axis 10 inside the casing 1, and is rotated in the direction of the arrow 19 by a motor 12 (see specifically Figure 3) which drives the impeller shaft 13. Said eccentricity of the impeller 11 is such that the casing axis 14 is in a position approximately diametrically opposite said Pitot tube 5. Finally, in proximity to said impeller axis 14 in that casing region opposite said intake pipe 8 about the plane containing both the casing axis 10 and the impeller axis 13, this plane being indicated by the dashed and dotted line 15, there opens at 16 a second delivery pipe 17, also provided with an automatic valve 18.
  • the method of operating the multi-phase pumping device is as follows.
  • the multi-phase fluid which enters the chamber 20 defined by the casing 1 via the automatic valve 9, the pipe 8 and the entry hole 21, is rotated by the blades 11 of the eccentric impeller rotating in the direction of the arrow 19 about its axis 13, with the result that its liquid part 22 is centrifuged to form a liquid ring concentric with the axis 10 of the casing 1, the inner surface 23 of which forms a peripheral seal for the gas 24 of said fluid, which remains contained within the region 25 in the spaces between said blades 11.
  • the volume of said spaces decreases progressively from the intake pipe 8 to the delivery pipe 17, said gas undergoes compression and therefore flows from the pipe 17 at a pressure which is higher the greater the reduction in the volume of said spaces. That part of the centrifuged liquid which enters the Pitot tube converts its kinetic energy into pressure.
  • said liquid ring increases in thickness and tends to occupy the entire said chamber 20 until the insufficient pressure created in said region 25 causes the valve 18 to close, providing optimum high-efficiency pumping of the liquid.
  • said liquid ring decreases in thickness until the insufficient pressure at the Pitot tube causes the valve 7 to close before the seal against the impeller blades is broken, so allowing optimum high-efficiency compression of the gas.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Electromagnetic Pumps, Or The Like (AREA)
  • Non-Positive Displacement Air Blowers (AREA)
  • Fluid-Pressure Circuits (AREA)

Claims (1)

  1. Pumpvorrichtung für ein Mehrphasenfluid mit einem beliebigen Gasgehalt, insbesondere für Mehrphasenfluide, die von Kohlenwasserstoff-Reservoirs kommen, mit einem Scheibengehäuse (1) mit einem ringförmigen Umfangprofil (4), einem mit Schaufeln versehenen Pumpenrad (11), das exzentrisch an dem Gehäuse (1) angebracht ist, einem Eintrittsloch (21), das mit dem Einlaßrohr (8) für das Mehrphasenfluid verbunden ist, zwei Lieferöffnungen, die mit den Lieferrohren (6, 17) verbunden sind, einer Öffnung (16) des Lieferrohres (17), die in der Nähe der Pumpenradachse (14) und gegenüberliegend zu dem Einlaßrohr (8) angeordnet ist; wobei die innere Kammer (20) der Pumpvorrichtung in einen äußeren Flüssigkeitsring (22) und einen inneren Bereich (25) zwischen den Schaufeln (11) aufgeteilt ist, in dem die gasförmige Phase enthalten ist,
    dadurch gekennzeichnet,
    daß der innere Bereich (25) die gasförmige Phase als Blasen (24) enthält, die in die flüssige Phase dispergiert sind, wobei gepumptes Mehrphasenfluid von dem inneren Bereich (25) durch die Öffnung (16) geliefert wird; daß der Teil der zentrifugierten Flüssigkeit mittels dem Staurohr (5) durch das Rohr (6) geliefert wird, wobei das Lieferrohr (6) exzentrisch und in einer Position diametral gegenüberliegend zu der Achse (14) des Pumpenrades (11) angeordnet ist, und daß die Lieferrohre (6, 17) mit automatischen Ventilen (7, 18) versehen sind, von denen das Ventil (7) automatisch geschlossen wird, wenn das Mehrphasenfluid auf nur eine gasförmige Phase reduziert ist und das Ventil (18) automatisch geschlossen wird, wenn das Mehrphasenfluid auf nur eine flüssige Phase reduziert ist, wodurch so eine Komprimierung der Gasphase bzw. ein Pumpen der flüssigen Phase ermöglicht wird.
EP93200193A 1992-01-29 1993-01-26 Flüssigkeitsringpumpe Expired - Lifetime EP0554937B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI920160 1992-01-29
ITMI920160A IT1260466B (it) 1992-01-29 1992-01-29 Dispositivo di pompaggio multifase perfezionato

Publications (2)

Publication Number Publication Date
EP0554937A1 EP0554937A1 (de) 1993-08-11
EP0554937B1 true EP0554937B1 (de) 1997-08-06

Family

ID=11361709

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93200193A Expired - Lifetime EP0554937B1 (de) 1992-01-29 1993-01-26 Flüssigkeitsringpumpe

Country Status (5)

Country Link
EP (1) EP0554937B1 (de)
AT (1) ATE156570T1 (de)
DE (1) DE69312753D1 (de)
IT (1) IT1260466B (de)
NO (1) NO179807C (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4234936A1 (de) * 2022-02-25 2023-08-30 Airbus Operations GmbH Zentrifugalreservoirpumpe zur verarbeitung eines wasserstoffstroms in einem flugzeug

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE313262C (de) *
FR645464A (fr) * 1927-06-21 1928-10-26 Pompe d'évacuation d'air
GB296726A (en) * 1927-09-06 1929-11-27 Irving Callender Jennings Improvements in pumps
DE689489C (de) * 1936-03-28 1940-03-26 Siemens Schuckertwerke Akt Ges Fluegelradverdichter mit abdichtendem kreisenden Fluessigkeitsring
DE735626C (de) * 1937-09-22 1943-05-20 Siemens Ag Wasserringpumpe
FR861453A (fr) * 1938-11-18 1941-02-10 Masch Fabrikburckhardt A G Pompe rotative à roue à ailettes, à anneau de liquide, pourle déplacement simultané d'un gaz et d'un liquide
US4946349A (en) * 1989-07-19 1990-08-07 National Space Development Agency Of Japan Water ring vacuum pump

Also Published As

Publication number Publication date
IT1260466B (it) 1996-04-09
NO930270D0 (no) 1993-01-27
ATE156570T1 (de) 1997-08-15
EP0554937A1 (de) 1993-08-11
NO179807B (no) 1996-09-09
NO930270L (no) 1993-07-30
ITMI920160A0 (it) 1992-01-29
ITMI920160A1 (it) 1993-07-30
NO179807C (no) 1996-12-18
DE69312753D1 (de) 1997-09-11

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