EP2134971B1 - Pump system and method for pumping multi-phase compounds - Google Patents
Pump system and method for pumping multi-phase compounds Download PDFInfo
- Publication number
- EP2134971B1 EP2134971B1 EP08716841.5A EP08716841A EP2134971B1 EP 2134971 B1 EP2134971 B1 EP 2134971B1 EP 08716841 A EP08716841 A EP 08716841A EP 2134971 B1 EP2134971 B1 EP 2134971B1
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- EP
- European Patent Office
- Prior art keywords
- pumping
- separator
- stages
- multiphase
- axial
- Prior art date
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- 238000005086 pumping Methods 0.000 title claims description 115
- 238000000034 method Methods 0.000 title claims description 23
- 150000001875 compounds Chemical class 0.000 title 1
- 239000000203 mixture Substances 0.000 claims description 78
- 230000006835 compression Effects 0.000 claims description 37
- 238000007906 compression Methods 0.000 claims description 37
- 239000007789 gas Substances 0.000 claims description 36
- 239000007791 liquid phase Substances 0.000 claims description 26
- 239000007792 gaseous phase Substances 0.000 claims description 21
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 239000007788 liquid Substances 0.000 description 18
- 239000012071 phase Substances 0.000 description 13
- 230000007423 decrease Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000005191 phase separation Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D31/00—Pumping liquids and elastic fluids at the same time
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S415/00—Rotary kinetic fluid motors or pumps
- Y10S415/901—Drilled well-type pump
Definitions
- the invention relates to a pumping system for conveying multiphase mixtures according to the preamble of claim 1 and a method for conveying multiphase mixtures according to the preamble of claim 6 and to a conveyor system with such a pumping system.
- a multiphase pump downstream of the separator is used to deliver the liquid fraction, allowing a separator of smaller volume because the multiphase pump is capable of delivering multiphase mixtures having a volumetric gas / liquid ratio greater than 5%.
- the use of multiphase pumps has the disadvantage that the producible delivery height is limited to a maximum of 1000 m.
- the disclosed pumping apparatus is capable of delivering multiphase mixtures of any volumetric gas / liquid ratio, with an example of a volumetric gas / liquid ratio of at least 40%.
- the in US 5,961,282 disclosed pumping device for multi-phase mixtures especially at higher gas / liquid ratios of, for example, 40% and higher economically and in terms of reliability not optimal, since at higher gas / liquid ratios, a larger number of axial pumping stages are required, which make the pumping device more expensive, and / or higher speeds of 5000 revolutions / minute and more are necessary, which increases the cost of storage and lubrication and has a negative effect on the reliability.
- the object of the invention is to provide a conveyor system and a method for conveying multiphase mixtures, as well as a conveyor system for multiphase mixtures comprising such a conveyor system, which for a volumetric gas / liquid ratio of greater than 20% or greater than 40% or greater than 60% are suitable, and which a comparatively compact and space-saving construction, and, depending on the number of delivery stages, enable delivery heights of 50 m to 2000 m and larger.
- the inventive pumping system for conveying multiphase mixtures comprises a pumping device for multiphase mixtures having at least one liquid phase and at least one gaseous phase.
- the pumping device comprises one or more axial compression stages each having an axial or semi-axial impeller and one or more delivery stages, each with a radial impeller, which are then arranged on the axial compression stage or stages, wherein the pumping system on the inlet side of the pumping device additionally comprises a separator to separate the gaseous phase or a part thereof, and wherein the pumping device is designed for delivery heights greater than 50 m.
- the pumping device is designed to deliver a multiphase mixture having a volumetric gas / liquid ratio of up to 20% or up to 30%.
- the impeller is provided with helico-axially formed blades in one or more or all of the axial compression stages.
- the pumping device for multiphase mixture contains one to six, in particular two to four axial compression stages.
- a return line is provided on the output side of the pump device for multiphase mixtures in order to recycle multiphase mixture into the separator.
- the pumping system comprises a control unit for the speed of the pumping device for To control multi-phase mixtures, wherein at least one level sensor is provided on the separator, which is connected to the control unit to control the level of the liquid phase or phases in the separator by varying the speed of the pumping device.
- a multiphase mixture is conveyed by means of a pump device which contains one or more axial compression stages each with an axial or semi-axial impeller and one or more delivery stages each with a radial impeller , which are then arranged at the axial compression stage or stages.
- a pump device which contains one or more axial compression stages each with an axial or semi-axial impeller and one or more delivery stages each with a radial impeller , which are then arranged at the axial compression stage or stages.
- part of the gaseous phase is separated from the liquid phase, and the liquid phase or the remaining multiphase mixture by means of the pumping device to a delivery height of more than 50 m or more than 100 m or more than 200 m promoted.
- a multiphase mixture is returned to the separator via a return line when the level in the separator falls below a minimum value.
- the level of the liquid phase or phases in the separator is detected by means of one or more level sensors and automatically controlled or regulated as needed by varying the speed of the pump device.
- the supply of multiphase mixture is interrupted to the separator when the level in the separator has exceeded a maximum allowable value, and / or the gas outlet from the separator via a gas outlet line by closing the same interrupted when the level in the separator, the inlet of the gas outlet line has reached.
- the delivery flow is interrupted in an outlet-side delivery line connected to the pumping device, for example by means of a return valve or shut-off device, when the outlet-side delivery pressure and / or delivery flow falls below a minimum value.
- the invention comprises a conveyor system comprising a pumping system according to one or more of the above-described embodiments and variants and / or equipped for carrying out a method as described above.
- the inventive pumping system and the inventive method have the advantage that the volume of the separator can be kept small, because thanks to the combination of a separator with a subsequent pumping device for multi-phase mixtures with high gas content to the phase separation in the separator no special requirements must be made.
- the pumping device still satisfactorily conveys the liquid portion of the multiphase mixture from the separator even if only part of the gaseous phase or phases are separated and the liquid portion still contains larger amounts of gas.
- the Separatorvolumen can therefore be chosen much smaller than is possible in comparable conveyor systems with radial pumps.
- internals for gas separation in the separator can be largely or completely dispensed with, so that the weight of the separator can be reduced.
- control and regulating methods described in the embodiments and variants enable trouble-free operation since the level in the separator is kept at a safe value even with a small volume thereof and unwanted operating conditions such as insufficient filling or overfilling of the separator are avoided or at least avoided have no harmful effects on the pumping system.
- both the gas content of the multiphase mixtures to be delivered and the achievable delivery head can be comparatively high.
- the volumetric gas / liquid ratio may be 40% or 60% or more, based on the thermodynamic conditions at the inlet of the pumping system, while depending on the number and design of the radial delivery stages, the head may be between 50 m and 2000 m and more.
- Pumping system 1 shown for conveying multiphase mixtures comprises a pumping device 3 for multi-phase mixtures with at least one liquid phase and at least one gaseous phase.
- the pumping device 3 includes one or more axial compression stages each having an axial or semi-axial impeller and one or more delivery stages, each with a radial impeller, which are then arranged on the axial compression stage or stages, the pumping system 1 on the inlet side of the pumping device additionally a separator. 2 to separate the gaseous phase or a part thereof, and wherein the pumping device is designed for delivery heights greater than 50 m.
- the pumping device 3 is designed to deliver a multiphase mixture having a volumetric gas / liquid ratio of up to 20% or up to 30%.
- the impeller is provided with helico-axially formed blades in one or more or all of the axial compression stage.
- the pumping device 3 for multiphase mixture contains one to six, in particular two to four axial compression stages. With the specified number of axial compression stages can be economically produced particularly advantageous pumping systems for multi-phase mixtures.
- An embodiment of a pumping device for use in a pumping system according to the present invention will be described within the scope of the description of FIG Fig. 3 explained in more detail.
- the pumping system 1 may occasionally include one or more of the additional components described below.
- the pumping system may include an inlet-side delivery line 4, which is conveniently connected to the separator 2 to supply the multiphase mixture to be conveyed to the separator, or a gas outlet line 5, which is conveniently connected to the separator 2, around the part of the separator separated in the separator leading away gaseous phase or phases. If the gaseous phase or phases are under pressure and / or lighter than air, they can escape through the gas outlet conduit 5 without additional funding.
- the pumping system 1 can include an outlet-side delivery line 6, which is expediently connected to an outlet of the pumping device 3 in order to forward liquid phases and / or multiphase mixtures conveyed by the pumping device.
- a reflux valve or shut-off means 8 is provided in the outlet-side delivery line 6 in order to interrupt the delivery flow when the outlet-side delivery pressure and / or delivery flow falls below a minimum value.
- a flow sensor 9 may be provided in the outlet-side delivery line 6.
- the pumping system 1 comprises a drive 13 for driving the pumping device 3 for multiphase mixtures and a control unit 10 which is connected to the drive 13 in order to control the rotational speed of the pumping device.
- a control unit 10 which is connected to the drive 13 in order to control the rotational speed of the pumping device.
- at least one level sensor 11 is provided on the separator 2, which is connected to the control unit 10 in order to automatically regulate the level of the liquid phase or phases in the separator by varying the speed of the pumping device 3.
- the pumping device 3 for multiphase mixtures is provided on the output side a return line 7 and optionally a shut-off valve 12 for shutting off the return line to recirculate multiphase mixture into the separator 2, especially if the level in the separator falls below a minimum value.
- the pumping system may additionally comprise a shut-off valve or shut-off means 14, which may be connected, for example, to the control unit 10 in order to interrupt the supply of multiphase mixture to the separator 2 via the inlet-side delivery line 4.
- a shut-off valve or shut-off means 14 which may be connected, for example, to the control unit 10 in order to interrupt the supply of multiphase mixture to the separator 2 via the inlet-side delivery line 4.
- the interruption of the supply of multiphase mixture to the separator is particularly advantageous when the level in the separator has exceeded a maximum allowable value.
- Fig. 2 shows a second embodiment of a pumping system for the promotion of multiphase mixtures according to the present invention.
- the pumping system 1 shown comprises a pumping device 3 for multiphase mixtures having at least one liquid phase and at least one gaseous phase.
- the pumping device 3 includes one or more axial compression stages each having an axial or semi-axial impeller and one or more delivery stages, each with a radial impeller, which are then arranged on the axial compression stage or stages, the pumping system 1 on the inlet side of the pumping device additionally a separator. 2 to separate the gaseous phase or a part thereof, and wherein the pumping device is designed for delivery heights greater than 50 m.
- the second embodiment differs from the first only in that in the second embodiment, a in Fig. 2 drawn return line 7 opens into an inlet-side delivery line 4 of the pumping system 1, while in the in Fig. 1 the embodiment shown, the return line opens into the separator 2.
- the return line 7 serves to return pumped by the pumping device 3 liquid phases and multiphase mixtures in the separator 2 and to avoid excessive reduction of the level in the separator.
- the recycled multiphase mixture in the separator subjected to the same separation process, as the freshly supplied multiphase mixture.
- shut-off valve 15 for shutting off a gas outlet line 5 of the separator, which, however, represents only one embodiment, which will be described separately below, since it can be used independently of the embodiment.
- This as part of Fig. 1 described shut-off valve 14 is in contrast Fig. 2 not redrawn, although it also represents an alternative embodiment, which can be used independently of the embodiment.
- the other features, characteristics and embodiments and variants of the second embodiment are identical to those of the first embodiment, which is why a repetition of the description is omitted below.
- a shut-off valve or shut-off 15 include, which may for example be connected to the control unit 10 in order to shut off a connected to the separator 2 gas outlet line 5.
- the shut-off of the gas outlet line 5 is particularly advantageous when the level in the separator has exceeded a maximum allowable value, for example, when the level reaches the gas outlet line.
- Fig. 3 shows an embodiment of a pumping device 30 for conveying multiphase mixtures for use in a pumping system according to the present invention.
- the pump device 30 comprises a first stage group with one or more, for example two axial compression stages 41.1, 41.2, each with one axial or semi-axial impeller to reduce the volumetric gas / liquid ratio of the multi-phase mixtures and to homogenize the phase distribution thereof, and additionally a second stage group with at least one conveyor stage 21.1 with a radial impeller 25.1, which is arranged on the outlet side of the first stage group.
- the one or more axial compression stages 41.1, 41.2 can, for example, according to the document GB-A-1 561 454 or document EP 0 486 877 A1 be designed pump or compression stages described.
- the first stage group may include one or more axial compression stages with an axial impeller on the inlet side and one or more axial compression stages with a semi-axial impeller on the outlet side.
- the second stage group of the pumping device 30 can be used for conveying multiphase mixtures to obtain larger delivery heights, as in FIG Fig. 3 shown to be equipped with, for example, two, three, four or more delivery stages.
- the axial compression stages 41.1, 41.2 of the first stage group and the radial delivery stages 21.1 of the second stage group are each arranged in series.
- the one or more axial compression stages 41.1, 41.2 of the first stage group each comprise an impeller 45.1, 45.2, which is helico-axially and / or helico-axially closed and / or semi-axial, and on which one or more blades, in particular at least two blades are formed.
- the blades are mounted, for example, on a hub, which may be mounted on a shaft 32 of the pumping device 30 for conveying multi-phase mixtures.
- the ratio between the inside and outside diameters of the one or more blades is typically between 0.3 and 0.95 on the inlet side and advantageously between 0.6 and 0.9.
- the one or more blades may, for example, have an entry angle between 2 ° and 50 °, and preferably between 4 ° and 25 °, and an exit angle that is between the entry angle and 60 °, and preferably between the entry angle and 25 °.
- the blades may have a profile formed by intersecting them with the surface of a cylinder coaxial with the impeller, in which the angle of inclination of the profile to the axial direction decreases continuously from the leading edge of the blade to the trailing edge, for example by the profile in the immediate vicinity Surrounding the leading edge has substantially no curvature and by the steepness of a curve of the blade profile curvature as a function of the axial distance from the leading edge with increasing distance from the leading edge constantly increases.
- the first step group comprises a first housing 43, 43 'and the second step group a second housing 23, 23', wherein the two housings 43, 43 ', 23, 23' are interconnected, and wherein the two housing a plurality of housing parts 43, 43 ', 23, 23' may be constructed.
- the first and second step group comprises a common holding device and / or a common housing 33, in which the first and second step groups are arranged, and which may, for example, contain a housing part that extends over at least a part of the first and a first Part of the second stage group extends.
- the one or more axial compression stages 41.1, 41.2 of the first stage group and the at least one conveyor stage 21.1 of the second stage group each comprise an impeller 45.1, 45.2, 25.1-25.4 and a guide 44.1, 44.2. 26.1, wherein the guide 44.2 of the last axial compression stage 41.2 of the first stage group is fluidly connected to the impeller 25.1 of the first conveyor stage 21.1 of the second stage group, for example via one or more connection channels or so-called return channels 36, in the housing or 33, 43rd , 43 ', 23, 23' are provided.
- guide elements 34 may be provided in the connection or return ducts 36.
- one or more of the axial compression stages 41.1, 41.2 of the first stage group each comprise a diffuser 44.1, 44.2, in particular a diffuser with a plurality Guide elements, which is fixedly connected to the first housing 43, 43 'and / or common housing 33.
- the guide elements may be formed as blades, wherein the diffuser may for example have between 6 and 50 blades, preferably between 12 and 30 blades.
- the blades may be oriented substantially tangentially to the flow and at the outlet substantially in the axial direction. If the associated impeller, as in Fig.
- the diffuser is advantageously provided in the center with a hub or sheath having a decreasing diameter in the conveying direction and, if necessary, a cutting line in an axial longitudinal section, the axis of inlet and / or outlet parallel to the axis ,
- the one or more axial compression stages 41.1, 41.2 of the first stage group and the at least one conveyor stage 21.1 of the second stage group have a common axis of rotation, for example by the one or more wheels 45.1, 45.2 of the one or more axial compression stages and the radial Impeller 25.1 the at least one conveyor stage on a common shaft 32, 42 are arranged.
- the common shaft may have a modified, preferably enlarged diameter in the area 42 of the first step group or a corresponding hub with an enlarged diameter.
- the first and second stage groups of the pumping device 30 are for conveying multi-phase mixtures with a common drive, which in Fig. 3 not shown, provided.
- the impeller 25.1 advantageously comprises one or more blades for accelerating the multiphase mixtures to be delivered in at least partially radial direction.
- the impeller may be open, semi-open or closed.
- the conveyor stage 21.1 comprises a housing 33, 23, which may be composed of several housing parts 23, 23 ', for example.
- a guide device 26.1 is formed in the housing, which connects externally to the impeller 25.1 and, for example via an annular space with the impeller of the next conveyor stage or the outlet the pumping device 30 may be connected to promote multi-phase mixtures.
- the pumping device 30 is designed to deliver multiphase mixtures for a volumetric gas / liquid ratio of up to 15% or up to 20% or up to 30%, based on the thermodynamic conditions at the inlet of the first axial compression stage of the first stage group.
- a multiphase mixture is conveyed by means of a pumping device 3, which contains one or more axial compression stages, each with an axial or semi-axial impeller and one or more delivery stages, each with a radial impeller, which are then arranged on the axial compression stage or stages.
- the gaseous phase or a part thereof is separated, and the liquid phase or the remaining multiphase mixture by means of the pumping device to a delivery height of more than 50 m or more than 100 m or more than 200 m promoted.
- the level of the liquid phase or phases in the separator 2 is detected by means of one or more level sensors 11 and automatically controlled or regulated as needed by varying the speed of the pumping device 3.
- the supply of multiphase mixture to the separator 2 is interrupted, for example by means of a shut-off valve 14 when the level in the separator has exceeded a maximum allowable value, and / or the gas outlet from the Separator 2 via a gas outlet line 5 by closing the same interrupted, for example by means of a check valve 15 when the level in the separator has exceeded a maximum allowable value, for example, when the level has reached the inlet of the gas outlet line 5.
- the delivery flow is interrupted in an outlet line 6 connected to the pumping device 3, for example by means of a reflux valve or shut-off means 8, when the outlet-side delivery pressure and / or delivery flow falls below a minimum value.
- a multiphase mixture is fed back into the separator 2 via a return line 7 when the filling level falls below a minimum value.
- the aforementioned embodiments of the method are particularly advantageous when the level in the separator 2 can not be kept in the desired range despite varying the speed of the pumping device 3.
- the invention comprises a conveyor system comprising a pumping system for conveying multiphase mixtures according to one or more of the above-described embodiments and variants and / or equipped for carrying out a method as described above.
- the above-described pumping system and the method described above for conveying multiphase mixtures are suitable for volumetric gas / liquid ratios of greater than 40% or greater than 60%, allow a comparatively compact and space-saving design and safe operation despite highly fluctuating supply of To be promoted multi-phase mixture and allow depending on the number of stages conveyor heads from 50 m to 2000 m and larger.
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Description
Die Erfindung betrifft ein Pumpsystem zur Förderung von Mehrphasengemischen gemäss Oberbegriff von Anspruch 1 und ein Verfahren zur Förderung von Mehrphasengemischen gemäss Oberbegriff von Anspruch 6 sowie eine Förderanlage mit einem derartigen Pumpsystem.The invention relates to a pumping system for conveying multiphase mixtures according to the preamble of
Bei der Förderung von Mehrphasengemischen, wie beispielsweise Rohöl, das neben Erdöl auch Erdgas und häufig auch Wasser und Feststoffanteile wie z.B. Sand enthält, stellt sich das Problem, dass mit steigendem Gasanteil im Mehrphasengemisch der Wirkungsgrad der verwendeten Pumpvorrichtungen abnimmt. Beispielsweise ist bei niedrigen Gasdichten der Einsatz von Pumpvorrichtungen mit radialen Laufrädern bereits ab einem volumetrischen Gas/Flüssigkeitsverhältnis von grösser als 3 bis 5 % nicht mehr möglich oder wirtschaftlich. In herkömmlichen Förderanlagen wird deshalb bei höherem Gasanteil die gasförmige Phase der Mehrphasengemische in einem Separator von der flüssigen abgetrennt und die beiden Phasen getrennt gefördert, wobei für die Förderung der flüssigen Phase Radialpumpen eingesetzt werden. Der Nachteil derartiger Fördersysteme besteht darin, dass der darin verwendete Separator für die Phasentrennung ein vergleichsweise grosses Volumen aufweist.In the production of multiphase mixtures, such as crude oil, in addition to petroleum, natural gas and often water and solid components such. Contains sand, the problem arises that with increasing proportion of gas in the multiphase mixture, the efficiency of the pumping devices used decreases. For example, at low gas densities, the use of pumping devices with radial impellers is already no longer possible or economical from a volumetric gas / liquid ratio of greater than 3 to 5%. In conventional conveyor systems, therefore, the gaseous phase of the multiphase mixtures is separated in a separator from the liquid at a higher gas content and the two phases are conveyed separately, being used for the promotion of the liquid phase radial pumps. The disadvantage of such conveyor systems is that the separator used for the phase separation has a comparatively large volume.
Für Anwendungen, wo wenig Platz zur Verfügung steht, wird deshalb für die Förderung des Flüssiganteils eine Mehrphasenpumpe nach dem Separator eingesetzt, die es erlaubt, einen Separator mit einem kleineren Volumen zu verwenden, da die Mehrphasenpumpe in der Lage ist, Mehrphasengemische mit einem volumetrischen Gas/Flüssigkeitsverhältnis von mehr als 5 % zu fördern. Die Verwendung von Mehrphasenpumpen hat jedoch den Nachteil, dass die damit erzeugbare Förderhöhe auf maximal 1000 m begrenzt ist.For applications where space is limited, therefore, a multiphase pump downstream of the separator is used to deliver the liquid fraction, allowing a separator of smaller volume because the multiphase pump is capable of delivering multiphase mixtures having a volumetric gas / liquid ratio greater than 5%. However, the use of multiphase pumps has the disadvantage that the producible delivery height is limited to a maximum of 1000 m.
Für Anwendungen, wo wenig Platz zur Verfügung steht und gegebenenfalls eine grössere Förderhöhe benötigt wird, wurden zudem spezielle Pumpvorrichtungen für Mehrphasengemische entwickelt, die einlassseitig mindestens eine axiale Kompressionsstufe enthalten, um das volumetrische Gas/Flüssigkeitsverhältnis der zu fördernden Mehrphasengemische soweit zu verringern, dass anschliessend herkömmliche Förderstufen mit radialen Laufrädern eingesetzt werden können. Normalerweise ist für die axiale Kompressionsstufe und die radialen Förderstufen eine gemeinsame Welle vorgesehen. In Dokument
Aufgabe der Erfindung ist es, ein Fördersystem und ein Verfahren zur Förderung von Mehrphasengemischen zur Verfügung zu stellen, sowie eine Förderanlage für Mehrphasengemische umfassend ein derartiges Fördersystem, welche für ein volumetrisches Gas/Flüssigkeitsverhältnis von grösser als 20 % oder grösser als 40% oder grösser als 60 % geeignet sind, und welche einen vergleichsweise kompakten und Platz sparenden Aufbau, und je nach Anzahl der Förderstufen Förderhöhen von 50 m bis 2000 m und grösser ermöglichen.The object of the invention is to provide a conveyor system and a method for conveying multiphase mixtures, as well as a conveyor system for multiphase mixtures comprising such a conveyor system, which for a volumetric gas / liquid ratio of greater than 20% or greater than 40% or greater than 60% are suitable, and which a comparatively compact and space-saving construction, and, depending on the number of delivery stages, enable delivery heights of 50 m to 2000 m and larger.
Diese Aufgabe wird erfindungsgemäss durch das in Anspruch 1 definierte Pumpsystem, und das in Anspruch 6 definierte Verfahren gelöst, sowie durch die in Anspruch 10 definierte Förderanlage.This object is achieved according to the invention by the defined in
Das erfindungsgemässe Pumpsystem zur Förderung von Mehrphasengemischen umfasst eine Pumpvorrichtung für Mehrphasengemische mit mindestens einer flüssigen Phase und mindestens einer gasförmigen Phase. Die Pumpvorrichtung enthält eine oder mehrere axiale Kompressionsstufen mit jeweils einem axialen oder halbaxialen Laufrad und eine oder mehrere Förderstufen mit jeweils einem radialen Laufrad, die anschliessend an die axiale Kompressionsstufe oder -stufen angeordnet sind, wobei das Pumpsystem einlassseitig der Pumpvorrichtung zusätzlich einen Separator umfasst, um die gasförmige Phase oder einen Teil derselben abzutrennen, und wobei die Pumpvorrichtung für Förderhöhen grösser als 50 m ausgebildet ist. In einer typischen Anwendung ist die Pumpvorrichtung ausgelegt, um ein Mehrphasengemisch mit einem volumetrischen Gas/Flüssigkeitsverhältnis von bis zu 20 % oder bis zu 30 % zu fördern. In einer vorteilhaften Ausführungsvariante ist in einer oder mehreren oder sämtlichen der axialen Kompressionsstufen das Laufrad mit helico-axial ausgebildeten Schaufeln versehen. In einer weiteren vorteilhaften Ausführungsvariante enthält die Pumpvorrichtung für Mehrphasengemisch eine bis sechs, insbesondere zwei bis vier axiale Kompressionsstufen.The inventive pumping system for conveying multiphase mixtures comprises a pumping device for multiphase mixtures having at least one liquid phase and at least one gaseous phase. The pumping device comprises one or more axial compression stages each having an axial or semi-axial impeller and one or more delivery stages, each with a radial impeller, which are then arranged on the axial compression stage or stages, wherein the pumping system on the inlet side of the pumping device additionally comprises a separator to separate the gaseous phase or a part thereof, and wherein the pumping device is designed for delivery heights greater than 50 m. In a typical application, the pumping device is designed to deliver a multiphase mixture having a volumetric gas / liquid ratio of up to 20% or up to 30%. In an advantageous embodiment, the impeller is provided with helico-axially formed blades in one or more or all of the axial compression stages. In a further advantageous embodiment, the pumping device for multiphase mixture contains one to six, in particular two to four axial compression stages.
Erfindungsgemäss ist ausgangsseitig der Pumpvorrichtung für Mehrphasengemische eine Rückführleitung vorgesehen, um Mehrphasengemisch in den Separator zurückzuführen.According to the invention, a return line is provided on the output side of the pump device for multiphase mixtures in order to recycle multiphase mixture into the separator.
In einer vorteilhaften Ausführungsform weist die Pumpvorrichtung für Mehrphasengemisch einen Nennförderstrom Qmax auf und der Separator ein Volumen von höchstens V = 60s · Qmax oder höchstens V = 20s · Qmax.In an advantageous embodiment, the multiphase mixture pumping device has a nominal delivery flow Q max and the separator has a volume of at most V = 60s * Q max or at most V = 20s * Q max .
In einer weiteren vorteilhaften Ausführungsform umfasst das Pumpsystem eine Steuereinheit, um die Drehzahl der Pumpvorrichtung für Mehrphasengemische zu steuern, wobei am Separator mindestens ein Füllstandssensor vorgesehen ist, der mit der Steuereinheit verbunden ist, um den Füllstand der flüssigen Phase oder Phasen im Separator durch Variieren der Drehzahl der Pumpvorrichtung zu regeln.In a further advantageous embodiment, the pumping system comprises a control unit for the speed of the pumping device for To control multi-phase mixtures, wherein at least one level sensor is provided on the separator, which is connected to the control unit to control the level of the liquid phase or phases in the separator by varying the speed of the pumping device.
In dem erfindungsgemässen Verfahren zur Förderung von Mehrphasengemischen mit mindestens einer flüssigen Phase und mindestens einer gasförmigen Phase wird ein Mehrphasengemisch mittels einer Pumpvorrichtung gefördert, die eine oder mehrere axiale Kompressionsstufen mit jeweils einem axialen oder halbaxialen Laufrad enthält und eine oder mehrere Förderstufen mit jeweils einem radialen Laufrad, die anschliessend an die axialen Kompressionsstufe oder -stufen angeordnet sind. Zusätzlich wird in dem Verfahren in einem Separator einlassseitig der Pumpvorrichtung ein Teil der gasförmigen Phase von der flüssigen Phase abgetrennt, und die flüssige Phase beziehungsweise das restliche Mehrphasengemisch mittels der Pumpvorrichtung auf eine Förderhöhe von mehr als 50 m oder mehr als 100 m oder mehr als 200 m gefördert.In the method according to the invention for conveying multiphase mixtures having at least one liquid phase and at least one gaseous phase, a multiphase mixture is conveyed by means of a pump device which contains one or more axial compression stages each with an axial or semi-axial impeller and one or more delivery stages each with a radial impeller , which are then arranged at the axial compression stage or stages. In addition, in the process in a separator on the inlet side of the pumping device part of the gaseous phase is separated from the liquid phase, and the liquid phase or the remaining multiphase mixture by means of the pumping device to a delivery height of more than 50 m or more than 100 m or more than 200 m promoted.
Erfindungsgemäss wird über eine Rückführleitung Mehrphasengemisch in den Separator zurückgeführt, wenn der Füllstand im Separator einen minimalen Wert unterschreitet.According to the invention, a multiphase mixture is returned to the separator via a return line when the level in the separator falls below a minimum value.
In einer vorteilhaften Ausführungsform des Verfahrens wird der Füllstand der flüssigen Phase oder Phasen im Separator mittels eines oder mehreren Füllstandsensoren erfasst und bei Bedarf durch Variieren der Drehzahl der Pumpvorrichtung automatisch gesteuert oder geregelt.In an advantageous embodiment of the method, the level of the liquid phase or phases in the separator is detected by means of one or more level sensors and automatically controlled or regulated as needed by varying the speed of the pump device.
In einer vorteilhaften Ausführungsvariante wird die Zufuhr von Mehrphasengemisch zum Separator unterbrochen, wenn der Füllstand im Separator einen maximal zulässigen Wert überschritten hat, und/oder der Gasaustritt aus dem Separator über eine Gasaustrittsleitung durch Schliessen derselben unterbrochen, wenn der Füllstand im Separator den Einlass der Gasaustrittsleitung erreicht hat. In einer weiteren vorteilhaften Ausführungsvariante wird der Förderstrom in einer an die Pumpvorrichtung angeschlossen auslassseitigen Förderleitung unterbrochen, beispielsweise mittels eines Rückflussventils oder Absperrmittels, wenn der auslassseitige Förderdruck und/oder Förderstrom unter einen minimalen Wert fällt.In an advantageous embodiment, the supply of multiphase mixture is interrupted to the separator when the level in the separator has exceeded a maximum allowable value, and / or the gas outlet from the separator via a gas outlet line by closing the same interrupted when the level in the separator, the inlet of the gas outlet line has reached. In a further advantageous embodiment variant, the delivery flow is interrupted in an outlet-side delivery line connected to the pumping device, for example by means of a return valve or shut-off device, when the outlet-side delivery pressure and / or delivery flow falls below a minimum value.
Zusätzlich umfasst die Erfindung eine Förderanlage umfassend ein Pumpsystem nach einer oder mehreren der oben beschriebenen Ausführungsformen und Ausführungsvarianten und/oder ausgestattet zur Ausführung eines Verfahrens nach oben stehender Beschreibung.In addition, the invention comprises a conveyor system comprising a pumping system according to one or more of the above-described embodiments and variants and / or equipped for carrying out a method as described above.
Das erfindungsgemässe Pumpsystem und das erfindungsgemässe Verfahren haben den Vorteil, dass das Volumen des Separators klein gehalten werden kann, da dank der Kombination eines Separators mit einer nachfolgenden Pumpvorrichtung für Mehrphasengemische mit hohem Gasanteil an die Phasentrennung im Separator keine besonderen Anforderungen gestellt werden müssen. Die Pumpvorrichtung fördert den flüssigen Anteil des Mehrphasengemisches aus dem Separator auch dann noch zufriedenstellend, wenn nur ein Teil der gasförmigen Phase oder Phasen abgetrennt werden und der flüssige Anteil noch grössere Mengen Gas enthält. Das Separatorvolumen kann deshalb wesentlich kleiner gewählt werden, als dies in vergleichbaren Fördersystemen mit Radialpumpen möglich ist. Darüber hinaus kann im erfindungsgemässen Pumpsystem und Verfahren auf Einbauten für die Gastrennung im Separator weitgehend oder ganz verzichtet werden, sodass das Gewicht des Separators gesenkt werden kann. Die in den Ausführungsformen und -varianten beschriebenen Steuer- und Regelverfahren ermöglichen darüber hinaus einen störungsfreien Betrieb, da damit der Füllstand im Separator auch bei kleinem Volumen desselben auf einem sicheren Wert gehalten wird und unerwünschte Betriebszustände wie mangelnde Füllung oder Überfüllung des Separators vermieden werden oder wenigstens keine schädlichen Auswirkungen auf das Pumpsystem haben.The inventive pumping system and the inventive method have the advantage that the volume of the separator can be kept small, because thanks to the combination of a separator with a subsequent pumping device for multi-phase mixtures with high gas content to the phase separation in the separator no special requirements must be made. The pumping device still satisfactorily conveys the liquid portion of the multiphase mixture from the separator even if only part of the gaseous phase or phases are separated and the liquid portion still contains larger amounts of gas. The Separatorvolumen can therefore be chosen much smaller than is possible in comparable conveyor systems with radial pumps. Moreover, in the pumping system and method according to the invention, internals for gas separation in the separator can be largely or completely dispensed with, so that the weight of the separator can be reduced. In addition, the control and regulating methods described in the embodiments and variants enable trouble-free operation since the level in the separator is kept at a safe value even with a small volume thereof and unwanted operating conditions such as insufficient filling or overfilling of the separator are avoided or at least avoided have no harmful effects on the pumping system.
Von Vorteil ist auch, dass trotz des vergleichsweise geringen Platzbedarfs sowohl der Gasanteil der zu fördernden Mehrphasengemische als auch die erzielbare Förderhöhe vergleichsweise hoch sein können. So kann beispielsweise das volumetrische Gas/Flüssigkeitsverhältnis 40 % oder 60 % oder mehr betragen, bezogen auf die thermodynamischen Bedingungen am Einlass des Pumpsystems, während die Förderhöhe je nach Anzahl und Ausgestaltung der radialen Förderstufen zwischen 50 m und 2000 m und mehr betragen kann.It is also advantageous that, despite the comparatively small footprint, both the gas content of the multiphase mixtures to be delivered and the achievable delivery head can be comparatively high. For example, the volumetric gas / liquid ratio may be 40% or 60% or more, based on the thermodynamic conditions at the inlet of the pumping system, while depending on the number and design of the radial delivery stages, the head may be between 50 m and 2000 m and more.
Die obige Beschreibung von Ausführungsformen dient lediglich als Beispiel. Weitere vorteilhafte Ausführungsformen gehen aus den abhängigen Ansprüchen hervor.The above description of embodiments is merely an example. Further advantageous embodiments will become apparent from the dependent claims.
Im Folgenden wird die Erfindung an Hand der Ausführungsbeispiele und an Hand der Zeichnung näher erläutert. Es zeigen:
- Fig. 1
- ein Ausführungsbeispiel eines Pumpsystems gemäss vorliegender Erfindung,
- Fig. 2
- ein zweites Ausführungsbeispiel eines Pumpsystems gemäss vorliegender Erfindung, und
- Fig. 3
- ein Ausführungsbeispiel einer Pumpvorrichtung zur Verwendung in einem Pumpsystem gemäss vorliegender Erfindung.
- Fig. 1
- an embodiment of a pumping system according to the present invention,
- Fig. 2
- A second embodiment of a pumping system according to the present invention, and
- Fig. 3
- an embodiment of a pumping device for use in a pumping system according to the present invention.
Das in
In einer vorteilhaften Ausführungsvariante ist in einer oder mehreren oder sämtlichen der axialen Kompressionsstufe das Laufrad mit helico-axial ausgebildeten Schaufeln versehen. In einer weiteren vorteilhaften Ausführungsvariante enthält die Pumpvorrichtung 3 für Mehrphasengemisch eine bis sechs, insbesondere zwei bis vier axiale Kompressionsstufen. Mit der angegebenen Anzahl axialer Kompressionsstufen lassen sich wirtschaftlich besonders vorteilhafte Pumpsysteme für Mehrphasengemische herstellen. Ein Ausführungsbeispiel einer Pumpvorrichtung zur Verwendung in einem Pumpsystem gemäss vorliegender Erfindung wird im Rahmen der Beschreibung von
Zusätzlich kann das Pumpsystem 1 fallweise eines oder mehrere der nachfolgend beschriebenen zusätzlichen Bauteile umfassen. Beispielsweise kann das Pumpsystem eine einlassseitige Förderleitung 4 enthalten, die zweckmässigerweise mit dem Separator 2 verbunden ist, um das zu fördernde Mehrphasengemisch dem Separator zu zuführen, oder eine Gasaustrittsleitung 5, die zweckmässigerweise mit dem Separator 2 verbunden ist, um den im Separator abgetrennten Teil der gasförmigen Phase oder Phasen wegzuführen. Falls die gasförmige Phase oder Phasen unter Überdruck stehen und/oder leichter als Luft sind, können diese ohne zusätzliche Fördermittel durch die Gasaustrittsleitung 5 entweichen. Weiter kann das Pumpsystem 1 eine auslassseitige Förderleitung 6 enthalten, die zweckmässigerweise mit einem Auslass der Pumpvorrichtung 3 verbunden ist, um von der Pumpvorrichtung geförderte Flüssigphasen und/oder Mehrphasengemische weiterzuleiten. Vorteilhafterweise wird in der auslassseitigen Förderleitung 6 ein Rückflussventil oder Absperrmittel 8 vorgesehen, um den Förderstrom zu unterbrechen, wenn der auslassseitige Förderdruck und/oder Förderstrom unter einen minimalen Wert fällt. Zur Erfassung des auslassseitigen Förderstromes kann zum Beispiel ein Durchflussaufnehmer 9 in der auslassseitigen Förderleitung 6 vorgesehen sein.In addition, the
In einer vorteilhaften Ausführungsform weist die Pumpvorrichtung 3 für Mehrphasengemische einen maximalen Förderstrom Qmax auf und der Separator 2 ein Volumen von höchstens V = 60s · Qmax oder höchstens V = 20s · Qmax.In an advantageous embodiment, the
In einer weiteren vorteilhaften Ausführungsform umfasst das Pumpsystem 1 einen Antrieb 13 zum Antreiben der Pumpvorrichtung 3 für Mehrphasengemische und eine Steuereinheit 10, die mit dem Antrieb 13 verbunden ist, um die Drehzahl der Pumpvorrichtung zu steuern. Vorteilhafterweise ist am Separator 2 mindestens ein Füllstandssensor 11 vorgesehen, der mit der Steuereinheit 10 verbunden ist, um den Füllstand der flüssigen Phase oder Phasen im Separator durch Variieren der Drehzahl der Pumpvorrichtung 3 automatisch zu regeln.In a further advantageous embodiment, the
In dem Pumpensystem zur Förderung von Mehrphasengemischen gemäss vorliegender Erfindung ist ausgangsseitig der Pumpvorrichtung 3 für Mehrphasengemische eine Rückführleitung 7 und optional ein Absperrventil 12 zum Absperren der Rückführleitung vorgesehen, um Mehrphasengemisch in den Separator 2 zurückzuführen, insbesondere wenn der Füllstand im Separator einen minimalen Wert unterschreitet.In the pump system for conveying multiphase mixtures according to the present invention, the
Das Pumpsystem kann zusätzlich ein Absperrventil oder Absperrmittel 14 umfassen, das beispielsweise mit der Steuereinheit 10 verbunden sein kann, um die Zufuhr von Mehrphasengemisch zum Separator 2 über die einlassseitige Förderleitung 4 zu unterbrechen. Die Unterbrechung der Zufuhr von Mehrphasengemisch zum Separator ist vor allem dann vorteilhaft, wenn der Füllstand im Separator einen maximal zulässigen Wert überschritten hat.The pumping system may additionally comprise a shut-off valve or shut-off means 14, which may be connected, for example, to the
Das zweite Ausführungsbeispiel unterscheidet sich von dem ersten lediglich darin, dass im zweiten Ausführungsbeispiel eine in
Das Pumpsystem kann, wie erwähnt und in
Mit Vorteil werden die axialen Kompressionsstufen 41.1, 41.2 der ersten Stufengruppe und die radialen Förderstufen 21.1 der zweiten Stufengruppe jeweils in Reihe angeordnet. Es ist jedoch beispielsweise auch möglich, die radialen Förderstufen der zweiten Stufengruppe in zwei gegenläufige Untergruppen aufzuteilen, wodurch der Axialschubausgleich vereinfacht wird.Advantageously, the axial compression stages 41.1, 41.2 of the first stage group and the radial delivery stages 21.1 of the second stage group are each arranged in series. However, it is also possible, for example, to divide the radial conveyor stages of the second stage group into two counter-rotating subgroups, whereby the axial thrust compensation is simplified.
In einer vorteilhaften Ausführungsform umfassen die eine oder mehreren axialen Kompressionsstufen 41.1, 41.2 der ersten Stufengruppe jeweils ein Laufrad 45.1, 45.2, welches helico-axial und/oder helico-axial geschlossen und/oder halbaxial ausgeführt ist, und an welchem eine oder mehrere Schaufeln, insbesondere mindestens zwei Schaufeln, ausgebildet sind. Vorteilhafterweise werden die Schaufeln z.B. auf einer Nabe befestigt, die auf einer Welle 32 der Pumpvorrichtung 30 zur Förderung von Mehrphasengemischen aufgezogen sein kann. Das Verhältnis zwischen Innen- und Aussendurchmesser der einen oder mehreren Schaufeln liegt einlassseitig typisch zwischen 0.3 und 0.95 und mit Vorteil zwischen 0.6 und 0.9. Die eine oder mehreren Schaufeln können beispielsweise einen Eintrittswinkel zwischen 2° und 50° und vorzugsweise zwischen 4° und 25° aufweisen sowie einen Austrittswinkel, der zwischen dem Eintrittswinkel und 60° liegt und vorzugsweise zwischen dem Eintrittswinkel und 25°. Weiter können die Schaufeln ein Profil aufweisen, das durch den Schnitt derselben mit der Oberfläche eines zum Laufrad koaxialen Zylinders gebildet wird, in welchem der Neigungswinkel des Profils zur axialen Richtung von der Eintrittskante der Schaufel bis zur Austrittskante kontinuierlich abnimmt, beispielsweise indem das Profil in der unmittelbaren Umgebung der Eintrittskante im Wesentlichen keine Krümmung aufweist und indem sich die Steilheit einer Kurve der Schaufelprofilkrümmung als Funktion des axialen Abstandes von der Eintrittskante mit zunehmendem Abstand von der Eintrittskante ständig vergrössert.In an advantageous embodiment, the one or more axial compression stages 41.1, 41.2 of the first stage group each comprise an impeller 45.1, 45.2, which is helico-axially and / or helico-axially closed and / or semi-axial, and on which one or more blades, in particular at least two blades are formed. Advantageously, the blades are mounted, for example, on a hub, which may be mounted on a
In einer vorteilhaften Ausführungsvariante umfasst die erste Stufengruppe ein erstes Gehäuse 43, 43' und die zweite Stufengruppe ein zweites Gehäuse 23, 23', wobei die beiden Gehäuse 43, 43', 23, 23' miteinander verbunden sind, und wobei die beiden Gehäuse aus mehreren Gehäuseteilen 43, 43', 23, 23' aufgebaut sein können. In einer weiteren vorteilhaften Ausführungsvariante umfasst die erste und zweite Stufengruppe eine gemeinsame Haltevorrichtung und/oder ein gemeinsames Gehäuse 33, in welchem die erste und zweite Stufengruppe angeordnet sind, und welches beispielsweise ein Gehäuseteil enthalten kann, das sich wenigstens über einen Teil der ersten sowie einen Teil der zweiten Stufengruppe erstreckt.In an advantageous embodiment variant, the first step group comprises a
Mit Vorteil umfassen die eine oder mehreren axialen Kompressionsstufen 41.1, 41.2 der ersten Stufengruppe und die mindestens eine Förderstufe 21.1 der zweiten Stufengruppe jeweils ein Laufrad 45.1,45.2, 25.1-25.4 und eine Leitvorrichtung 44.1, 44.2. 26.1, wobei die Leitvorrichtung 44.2 der letzten axialen Kompressionsstufe 41.2 der ersten Stufengruppe fluidleitend mit dem Laufrad 25.1 der ersten Förderstufe 21.1 der zweiten Stufengruppe verbunden ist, beispielsweise über einen oder mehrere Verbindungskanäle oder so genannte Rückführkanäle 36, die in dem oder den Gehäusen 33, 43, 43', 23, 23' vorgesehen sind. In einer vorteilhaften Ausführungsvariante können in dem oder den Verbindungs- oder Rückführkanälen 36 Leitelemente 34 vorgesehen sein.Advantageously, the one or more axial compression stages 41.1, 41.2 of the first stage group and the at least one conveyor stage 21.1 of the second stage group each comprise an impeller 45.1, 45.2, 25.1-25.4 and a guide 44.1, 44.2. 26.1, wherein the guide 44.2 of the last axial compression stage 41.2 of the first stage group is fluidly connected to the impeller 25.1 of the first conveyor stage 21.1 of the second stage group, for example via one or more connection channels or so-called
In einer weiteren vorteilhaften Ausführungsform umfassen eine oder mehrere der axialen Kompressionsstufen 41.1, 41.2 der ersten Stufengruppe, jeweils einen Diffusor 44.1, 44.2, insbesondere einen Diffusor mit mehreren Leitelementen, der fest mit dem ersten Gehäuse 43, 43' und/oder gemeinsamen Gehäuse 33 verbunden ist. Die Leitelemente können als Schaufeln ausgebildet sein, wobei der Diffusor beispielsweise zwischen 6 und 50 Schaufeln, vorzugsweise zwischen 12 und 30 Schaufeln aufweisen kann. Am Einlass des Diffusors 44.1, 44.2 können die Schaufeln z.B. im Wesentlichen tangential zur Strömung ausgerichtet sein und am Auslass im Wesentlichen in axialer Richtung. Falls das zugehörige Laufrad, wie in
In einer weiteren bevorzugten Ausführungsform weisen die eine oder mehreren axialen Kompressionsstufen 41.1, 41.2 der ersten Stufengruppe und die mindestens eine Förderstufe 21.1 der zweiten Stufengruppe eine gemeinsame Rotationsachse auf, beispielsweise indem das oder die Laufräder 45.1, 45.2 der einen oder mehreren axialen Kompressionsstufen und das radiale Laufrad 25.1 der mindestens einen Förderstufe auf einer gemeinsamen Welle 32, 42 angeordnet sind. Die gemeinsame Welle kann im Bereich 42 der ersten Stufengruppe einen geänderten, vorzugsweise vergrösserten Durchmesser aufweisen oder eine entsprechende Nabe mit vergrössertem Durchmesser. Vorteilhafterweise ist die erste und zweite Stufengruppe der Pumpvorrichtung 30 zur Förderung von Mehrphasengemischen mit einem gemeinsamen Antrieb, der in
In der mindestens einen Förderstufe 21.1 der zweiten Stufengruppe umfasst das Laufrad 25.1 vorteilhafterweise eine oder mehrere Schaufeln zur Beschleunigung der zu fördernden Mehrphasengemische in zumindest teilweise radialer Richtung. Das Laufrad kann offen, halboffen oder geschlossen ausgeführt sein. Zweckmässigerweise umfasst die Förderstufe 21.1 ein Gehäuse 33, 23, das z.B. aus mehreren Gehäuseteilen 23, 23' aufgebaut sein kann. Vorteilhafterweise ist im Gehäuse eine Leitvorrichtung 26.1 ausgebildet, die aussen an das Laufrad 25.1 anschliesst und z.B. über einen Ringraum mit dem Laufrad der nächsten Förderstufe oder dem Auslass der Pumpvorrichtung 30 zur Förderung von Mehrphasengemischen verbunden sein kann.In the at least one conveying stage 21.1 of the second step group, the impeller 25.1 advantageously comprises one or more blades for accelerating the multiphase mixtures to be delivered in at least partially radial direction. The impeller may be open, semi-open or closed. Conveniently, the conveyor stage 21.1 comprises a
Vorteilhafterweise ist die Pumpvorrichtung 30 zur Förderung von Mehrphasengemischen für ein volumetrisches Gas/Flüssigkeitsverhältnis von bis zu 15 % oder bis zu 20% oder bis zu 30%, ausgebildet, bezogen auf die thermodynamischen Bedingungen am Einlass der ersten axialen Kompressionsstufe der ersten Stufengruppe.Advantageously, the
Ein Ausführungsbeispiel des erfindungsgemässen Verfahrens zur Förderung von Mehrphasengemischen mit mindestens einer flüssigen Phase und mindestens einer gasförmigen Phase wird im Folgenden an Hand der
Eine der Schwierigkeiten bei der Förderung von Mehrphasengemischen ist die unregelmässige Zufuhr und Zusammensetzung des zu fördernden Mehrphasengemisches, die bei einem kleinen Volumen des Separators besonders störend in Erscheinung tritt. In einer vorteilhaften Ausführungsform des Verfahrens wird deshalb der Füllstand der flüssigen Phase oder Phasen im Separator 2 mittels eines oder mehreren Füllstandsensoren 11 erfasst und bei Bedarf durch Variieren der Drehzahl der Pumpvorrichtung 3 automatisch gesteuert oder geregelt.One of the difficulties in conveying multiphase mixtures is the irregular supply and composition of the multiphase mixture to be delivered, which is particularly troublesome in the case of a small volume of the separator. In an advantageous embodiment of the method, therefore, the level of the liquid phase or phases in the separator 2 is detected by means of one or
In einer vorteilhaften Ausführungsvariante wird die Zufuhr von Mehrphasengemisch zum Separator 2 unterbrochen, beispielsweise mittels eines Absperrventils 14, wenn der Füllstand im Separator einen maximal zulässigen Wert überschritten hat, und/oder der Gasaustritt aus dem Separator 2 über eine Gasaustrittsleitung 5 durch Schliessen derselben unterbrochen, beispielsweise mittels eines Absperrventils 15, wenn der Füllstand im Separator einen maximal zulässigen Wert überschritten hat, zum Beispiel wenn der Füllstand den Einlass der Gasaustrittsleitung 5 erreicht hat. In einer weiteren vorteilhaften Ausführungsvariante wird der Förderstrom in einer an die Pumpvorrichtung 3 angeschlossen auslassseitigen Förderleitung 6 unterbrochen, beispielsweise mittels eines Rückflussventils oder Absperrmittels 8, wenn der auslassseitige Förderdruck und/oder Förderstrom unter einen minimalen Wert fällt. Gemäss der Erfindung wird über eine Rückführleitung 7 Mehrphasengemisch in den Separator 2 zurückgeführt, wenn der Füllstand einen minimalen Wert unterschreitet. Die erwähnten Ausführungsvarianten des Verfahrens sind besonders dann vorteilhaft, wenn der Füllstand im Separator 2 trotz Variieren der Drehzahl der Pumpvorrichtung 3 nicht im gewünschten Bereich gehalten werden kann.In an advantageous embodiment, the supply of multiphase mixture to the separator 2 is interrupted, for example by means of a shut-off
Zusätzlich umfasst die Erfindung eine Förderanlage umfassend ein Pumpsystem zur Förderung von Mehrphasengemischen nach einer oder mehreren der oben beschriebenen Ausführungsformen und Ausführungsvarianten und/oder ausgestattet zur Ausführung eines Verfahrens nach oben stehender Beschreibung.In addition, the invention comprises a conveyor system comprising a pumping system for conveying multiphase mixtures according to one or more of the above-described embodiments and variants and / or equipped for carrying out a method as described above.
Das oben stehend beschriebene Pumpsystem und das oben stehend beschriebene Verfahren zur Förderung von Mehrphasengemischen sind für volumetrische Gas/Flüssigkeitsverhältnisse von grösser als 40 % oder grösser als 60% geeignet, erlauben einen vergleichsweise kompakten und Platz sparenden Aufbau und einen sicheren Betrieb trotz stark schwankender Zufuhr des zu fördernden Mehrphasengemisches und ermöglichen je nach Anzahl der Förderstufen Förderhöhen von 50 m bis 2000 m und grösser.The above-described pumping system and the method described above for conveying multiphase mixtures are suitable for volumetric gas / liquid ratios of greater than 40% or greater than 60%, allow a comparatively compact and space-saving design and safe operation despite highly fluctuating supply of To be promoted multi-phase mixture and allow depending on the number of stages conveyor heads from 50 m to 2000 m and larger.
Claims (10)
- A pump system for the pumping of multiphase mixtures comprising a pumping apparatus (3, 30) for multiphase mixtures with at least one liquid phase and at least one gaseous phase, wherein the pumping apparatus (3, 30) comprises one or more axial compression stages (41.4, 41.2) with each stage comprising an axial or semi-axial impeller (45.1, 45.2), and one or more pumping stages (21.1) with one radial impeller (25.1 - 25.6), wherein the pumping stage or stages are arranged to adjoin the axial compression stage or stages, the pumping apparatus (3, 30) is made for delivery height larger than 50 m, characterised in that the pump system (1) additionally includes a separator (2) at the inlet side of the pumping apparatus (3, 30) to separate the gaseous phase or a portion thereof; and in that a return line (7) is provided at the output side of the pumping apparatus (3, 30) to return a multiphase mixture into the separator (2).
- A pump system in accordance with claim 1, wherein the pumping apparatus (3, 30) for multiphase mixtures comprises one to six axial compression stages (41.1, 41.2) and in particular two to four axial compression stages.
- A pump system in accordance with claim 1 or claim 2, wherein the impeller (45.1, 45.2) is provided with vanes made in helico-axial form in one or more, or all, of the axial compression stages (41.1, 41.2).
- A pump system in accordance with any one of the preceding claims, wherein the pumping apparatus (3, 30) for multiphase mixture has a maximum flow rate Qmax and the separator (2) has a volume of maximal V = 60s · Qmax.
- A pump system in accordance with any one of the preceding claims, wherein the pumping system (1) includes a control unit (10) to control the speed of the pumping apparatus (3, 30) for multiphase mixtures, and wherein at least one filling sensor (11) provided at the separator (2) is connected to the control unit (10) to regulate the filling level of the liquid phase or phases in the separator (2) by varying the speed of the pumping apparatus (3, 30).
- A method for the pumping of multiphase mixtures with at least one liquid phase and at least one gaseous phase, the method including pumping a multiphase mixture by means of a pumping apparatus (3, 30) which comprises one or more axial compression stages (41.1, 41.2) with each stage comprising anaxial or semi-axial impeller (45.1, 45.2), and one or more pumping stages (21.1) with one radial impeller (25.1 - 25.6), wherein the pumping stage or stages are arranged to adjoin the axial compression stage or stages, and pumping the liquid phase or the residual multiphase mixture to a delivery height of more than 50 m by means of the pumping apparatus (3, 30), characterised in that the gaseous phase or a portion thereof is separated in a separator (2) at the inlet side of the pumping apparatus (3, 30); and in that the multiphase mixture is led back into the separator (2) via a return line (7) when the filling level in the separator has fallen below a minimum value.
- A method in accordance with claim 6, wherein the filling level of the liquid phase or phases is detected in the separator (2) by means of one or more filling level sensors (11) and is automatically controlled or regulated by varying the speed of the pumping apparatus (3, 30).
- A method in accordance with one of the claims 6 or 7, wherein the supply of multiphase mixture to the separator (2) is interrupted when the filling level in the separator has exceeded a maximum permitted value and/or wherein the gas discharge from the separator (2) via a gas discharge line (5) is interrupted by closing thereof when the filling level in the separator has reached a maximum permitted value, and in particular when the filling level has reached the inlet of the gas discharge line (5).
- A method in accordance with any one of the claims 6 to 8, wherein the flow rate in a pumping line (6) connected to the pumping device (3, 30) at the outlet side is interrupted, for example by means of a return valve (8) when the pumping pressure and/or flow rate at the outlet side falls below a minimum value.
- A pumping unit including a pump system in accordance with any one of the claims 1 to 5.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO08716841A NO2134971T3 (en) | 2007-03-08 | 2008-02-14 | |
EP08716841.5A EP2134971B1 (en) | 2007-03-08 | 2008-02-14 | Pump system and method for pumping multi-phase compounds |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07103800 | 2007-03-08 | ||
EP08716841.5A EP2134971B1 (en) | 2007-03-08 | 2008-02-14 | Pump system and method for pumping multi-phase compounds |
PCT/EP2008/051767 WO2008107276A1 (en) | 2007-03-08 | 2008-02-14 | Pump system and method for delivering multi-phase mixtures |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2134971A1 EP2134971A1 (en) | 2009-12-23 |
EP2134971B1 true EP2134971B1 (en) | 2018-01-10 |
Family
ID=38462369
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08716841.5A Active EP2134971B1 (en) | 2007-03-08 | 2008-02-14 | Pump system and method for pumping multi-phase compounds |
Country Status (5)
Country | Link |
---|---|
US (1) | US8858154B2 (en) |
EP (1) | EP2134971B1 (en) |
BR (1) | BRPI0808047B1 (en) |
NO (1) | NO2134971T3 (en) |
WO (1) | WO2008107276A1 (en) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0718846D0 (en) | 2007-09-27 | 2007-11-07 | Cummins Turbo Tech Ltd | Compressor |
GB2470151B (en) * | 2008-03-05 | 2012-10-03 | Dresser Rand Co | Compressor assembly including separator and ejector pump |
DE102009016392A1 (en) * | 2009-04-07 | 2010-10-14 | Man Turbo Ag | compressor assembly |
IT1401868B1 (en) | 2010-08-31 | 2013-08-28 | Nuova Pignone S R L | TURBOMACCHINA WITH MIXED FLOW STAGE AND METHOD. |
US9624930B2 (en) | 2012-12-20 | 2017-04-18 | Ge Oil & Gas Esp, Inc. | Multiphase pumping system |
US10801482B2 (en) | 2014-12-08 | 2020-10-13 | Saudi Arabian Oil Company | Multiphase production boost method and system |
US10208745B2 (en) | 2015-12-18 | 2019-02-19 | General Electric Company | System and method for controlling a fluid transport system |
US11835270B1 (en) | 2018-06-22 | 2023-12-05 | Booz Allen Hamilton Inc. | Thermal management systems |
US11384960B1 (en) * | 2018-11-01 | 2022-07-12 | Booz Allen Hamilton Inc. | Thermal management systems |
US11293673B1 (en) | 2018-11-01 | 2022-04-05 | Booz Allen Hamilton Inc. | Thermal management systems |
US11536494B1 (en) | 2018-11-01 | 2022-12-27 | Booz Allen Hamilton Inc. | Thermal management systems for extended operation |
CA3061943A1 (en) * | 2018-11-21 | 2020-05-21 | Sulzer Management Ag | Multiphase pump |
US11644221B1 (en) | 2019-03-05 | 2023-05-09 | Booz Allen Hamilton Inc. | Open cycle thermal management system with a vapor pump device |
US11561033B1 (en) | 2019-06-18 | 2023-01-24 | Booz Allen Hamilton Inc. | Thermal management systems |
US11752837B1 (en) | 2019-11-15 | 2023-09-12 | Booz Allen Hamilton Inc. | Processing vapor exhausted by thermal management systems |
US11561030B1 (en) | 2020-06-15 | 2023-01-24 | Booz Allen Hamilton Inc. | Thermal management systems |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5254292A (en) * | 1989-02-02 | 1993-10-19 | Institut Francais Du Petrole | Device for regulating and reducing the fluctuations in a polyphasic flow, and its use |
US4981175A (en) * | 1990-01-09 | 1991-01-01 | Conoco Inc | Recirculating gas separator for electric submersible pumps |
FR2699986B1 (en) * | 1992-12-29 | 1995-02-24 | Inst Francais Du Petrole | Device and method for transferring a multiphase type effluent in a single pipe. |
FR2748533B1 (en) * | 1996-05-07 | 1999-07-23 | Inst Francais Du Petrole | POLYPHASIC AND CENTRIFUGAL PUMPING SYSTEM |
FR2788815B1 (en) | 1999-01-26 | 2005-11-18 | Inst Francais Du Petrole | SYSTEM COMPRISING A SINGLE-PHASE COMPRESSION UNIT ASSOCIATED WITH A POLYPHASE COMPRESSION UNIT |
US6989103B2 (en) * | 2000-10-13 | 2006-01-24 | Schlumberger Technology Corporation | Method for separating fluids |
-
2008
- 2008-02-14 EP EP08716841.5A patent/EP2134971B1/en active Active
- 2008-02-14 BR BRPI0808047A patent/BRPI0808047B1/en active IP Right Grant
- 2008-02-14 WO PCT/EP2008/051767 patent/WO2008107276A1/en active Application Filing
- 2008-02-14 US US12/529,524 patent/US8858154B2/en active Active
- 2008-02-14 NO NO08716841A patent/NO2134971T3/no unknown
Also Published As
Publication number | Publication date |
---|---|
NO2134971T3 (en) | 2018-06-09 |
EP2134971A1 (en) | 2009-12-23 |
US20100098525A1 (en) | 2010-04-22 |
BRPI0808047A2 (en) | 2014-06-24 |
BRPI0808047B1 (en) | 2019-08-27 |
US8858154B2 (en) | 2014-10-14 |
WO2008107276A1 (en) | 2008-09-12 |
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