US3750940A - Control means for self-discharging centrifuge - Google Patents

Control means for self-discharging centrifuge Download PDF

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Publication number
US3750940A
US3750940A US00204625A US3750940DA US3750940A US 3750940 A US3750940 A US 3750940A US 00204625 A US00204625 A US 00204625A US 3750940D A US3750940D A US 3750940DA US 3750940 A US3750940 A US 3750940A
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United States
Prior art keywords
rotor
liquid
separated
sensing
mixture
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Expired - Lifetime
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US00204625A
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English (en)
Inventor
V Nilsson
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Alfa Laval AB
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Alfa Laval AB
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
    • B04B1/10—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl
    • B04B1/14—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl with periodical discharge
    • B04B1/16—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl with periodical discharge with discharging outlets controlled by the rotational speed of the bowl
    • B04B1/18—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl with periodical discharge with discharging outlets controlled by the rotational speed of the bowl controlled by the centrifugal force of an auxiliary liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B11/00—Feeding, charging, or discharging bowls
    • B04B11/02—Continuous feeding or discharging; Control arrangements therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B13/00—Control arrangements specially designed for centrifuges; Programme control of centrifuges

Definitions

  • the centrifugal rotor has an inlet for the mixture to be e separated, a central outlet for a separated liquid component of the mixture, and peripheral outlets for separated sediment of the mixture, means being provided for alternately 0 enin and closing the eri heral out [58] Field of Search 233/12 14R 16 P g P P 20 46 4 lets.
  • the rotor is charged with a special liquid having 1 a density intermediate those of the separated liquid component and the separated sediment, whereby an [56] References Cited interface is formed in the rotor between the separated UNITED STATES PATENTS liquid component and the special liquid; and means are 3,410,479 I 1/1968 NilSOn 233/20 R provided for sensing when this interface has moved ra- 3301476 1/1967 Hemfo" 233/20 R dially inward to a predetermined level in the rotor.
  • the present invention relates to centrifugal separators of the type in which the rotor has an inlet for a mixture to be separated, a central outlet for a separated liquid component, and peripheral outlets for separated sediment.
  • An object of the present invention is to provide a centrifugal separator of the type mentioned, wherein the above-described measurement problem is solved in a satisfactory manner.
  • the centrifugal separator with means for charging the rotor with a special liquid having a density greater than that of the light liquid component but lower than that of the sediment, and means for sensing when an interface (formed in the rotor) between the separated light liquid component and the said special liquid has moved radially inward to a predetermined level in the rotor, the sensing means being arranged to actuate means for opening the outlets situated at the periphery of the rotor.
  • the invention thus resides in charging the rotor with a liquid having predetermined measurable properties or physical magnitudes, there being created in the rotor an interface between this special liquid and the separated light liquid component, so that the position of this interface can easily be determined.
  • separated sediment takes the place of the somewhat lighter liquid, so that the said interface is moved radially inward in the rotor.
  • the interface has reached a predetermined level in the rotor, this indicates (if a predetermined quantity of the spe cial liquid has been supplied to the rotor) that so much sediment has been separated that the peripheral outlets should be opened.
  • the said quantity of liquid is preferably supplied to the rotor immediately after the peripheral outlets have been opened.
  • a supply of this kind serves to limit the time interval between the occasions when the pcripheral outlets are opened. This prevents separated sediment from being packed too hard in the rotor and thereby making it difficult or impossible to empty the rotor.
  • the sensing of sediment in the centrifugal separator means sensing of the position of an interface between two liquids in the ro tor, conventional measuring methods may be used.
  • the rotor of the centrifugal separator is therefore provided with a channel extending from the radially outer part of the rotor toward the rotor axis, means being arranged to compare the liquid pressures at a certain distance from the rotor axis, on one hand in this channel, and on the other hand in the separating chamber of the rotor (see for instance British Patent Specification No. 1,236,718).
  • the said pressure comparing means may be constituted by a single pressure-sensing instrument connected tothe channel.
  • the invention opens the possibility of using those previously proposed measuring methods which could not be successfully used before.
  • the measuring may be performed by means arranged to sense a difference between the liquid component separated in the rotor and the said supplied special liquid, for instance the difference between the dielectric constants of these two liquids.
  • Several other physical magnitudes, such as viscosity, density, etc. may be the base for measurements.
  • Optical and electrical measurement methods of different kinds can also be used.
  • An arrangement for sensing a difference between the separated liquid component and a special liquid supplied to the rotor may be placed in the rotor and thus be rotated with it.
  • the centrifugal separator has a channel beginning at the previously-mentioned predetermined level in the rotor, and means for creating a liquid flow through this channel from the predetermined level in the rotor.
  • the arrangement for sensing a difference between the separated liquid component and the special liquid supplied to the rotor may then be arranged for a direct sensing of the liquid flowing through this channel.
  • the present invention provides a solution to the previously described measurement problem, which solution gives the desired re- I liability and accuracy of the measurement values.
  • the invention also makes it possible, by so-called partial emptying of the rotor through the outlets situated at its periphery, to discharge all of the separated sediment without having any part of the separated liquid component (of the mixture supplied to the rotor) leaving the rotor the same way.
  • the partial emptying of the rotor can be controlled so that all of the sediment and only a portion of the sepcial liquid supplied to the rotor (for sensing) leave the rotor through its periphery outlets. It is previously known per se to displace a liquid separated in the rotor by means of a somewhat heavier liquid, immediately before the rotors peripheral outlets are to be opened. In these cases, however, the opening in itself has been initiated by a special means for sensing how much sediment has been separated in the rotor. According to the invention, these two functions (i.e., on one hand the sensing operation and on the other hand the displacement) are combined so that separate equipments for these functions are not necessary.
  • FIG. 1 is a vertical sectional view of a rotor ofa centrifugal separator according to the invention
  • FIG. 2 is a flow chart wherein the centrifugal separator is a part
  • FIG. 3 is a schematic view of a sensing equipment in one embodiment.
  • the centrifuge rotor in FIG. 1 comprises a lower part 1 and an upper part 2, which parts are held together by means of a locking ring 3.
  • the rotor is supported by a drive shaft 4 having a central channel 5 for the supply of a mixture to be separated in the rotor.
  • the mixture is directed by a distributor 7, provided with entraining wings 6, into the rotor separating chamber 8, wherein a set of conical discs 9 is arranged. Sediment separated from the mixture supplied to the rotor is collected at 10 in the rotor sediment chamber 8.
  • the rotor has a number of openings 11 situated at the periphery.
  • a valve disc 12 forming the bottom of the separating chamber 8 is arranged to uncover and close these openings.
  • the valve disc 12 is operable in a known manner by means of a liquid supplied to the lower side of it through a supply member 13 surrounding the drive shaft 4.
  • the valve disc 12 When liquid is supplied to a space 14 between the lower part 1 of the rotor and the valve disc 12, the valve disc 12 is kept at its upper position, in which it is pressed against the upper part 2 of the rotor.
  • throttled openings 15 in the rotor part 1 liquid flows out of the space 14.
  • the valve disc being pressed downward by the liquid pressure in the separating chamber 8, so that the openings 11 are uncovered.
  • the valve disc 12 is pressed upward again, so that the openings 11 are closed.
  • the liquid component which is separated from the mixture supplied to the rotor leaves the separating chamber 8 through a centrally situated overflow outlet 16, and flows thence into a chamber 17.
  • a paring disc 18 arranged in this chamber the separated liquid component is then pumped through an outlet conduit 19.
  • a channel 20 extends inward toward the rotor axis to a central chamber 21.
  • a paring disc 22 is arranged to pump liquid from this chamher out through a conduit 23, which thus constitutes a continuation of the channel 20.
  • a conduit 24 supplies a mixture to be separated in a centrifugal separator S.
  • the conduit 24 is thus directly connected to the channel 5 in the drive shaft 4 (see FIG. 1). Sediment separated from the mixture is led away through the conduit 19.
  • the conduit 23 beginning at the paring disc 22 in the chamber 21 (FIG. 1) is connected to the inlet conduit 24, as can be seen from FIG. 2, and contains a throttling device or restriction 26 for restricting the flow through it.
  • a pump 28 for this supply is arranged in the conduit 27.
  • the control equipment 29 receives from a sensing means 31, connected to the conduit 23, a certain indication of the liquid flow in the conduit 23.
  • This indication can be the liquid pressure in the conduit 23, the rate of the flow through the conduit 23, or whether a liquid of one kind or the other is flowing through the conduit 23.
  • Means of sensing a difference between two different liquids is previously known in varying embodiments depending on which property or physical magnitude of the liquids is to be sensed and compared (FIG. 3). If the indication is the pressure of the liquid in the conduit 23, the conduit can be essentially closed beyond the pressure indicator (in other words, no flow of liquid through the conduit is necessary).
  • the liquid pressure in the chamber 21 can be sensed in many other ways.
  • the rotor Through the conduit 24 and the channel 5 the rotor is charged with a mixture consisting mainly of one liquid component and one solid component, here referred to as the sediment. Simultaneously a further or special liquid is supplied by means of the pump 28 to the rotor through the conduits 27 and 24 and the channel 5, the density of this liquid being lower than that of the sediment separated in the rotor but greater than that of the liquid component separated in the rotor. In the rotor, the sediment will consequently be collected at the rotor periphery, and an interface will be formed between the separated liquid component and the said special liquid.
  • the said interface is slowly displaced radially inward in the rotor, partly depending on the fact that the amount of so-called special liquid in the rotor is increasing, and on the other hand depending on the fact that the amount of sediment separated in the rotor is increasing.
  • the amount of special liquid supplied to the rotor per unit of time may be varied with regard to the expected content of sediment in the separated mixture and/or the tendency toward hard packing of sediment at the rotor periphery. Normally the supplied amount of so-called special liquid is considerably smaller than the amount of mixture to .be separated.
  • the sensing means 31 When the interface reaches the opening of the channel 20 in the rotor, this is sensed by the sensing means 31, regardless of whether such means are arranged to sense the liquid pressure in the conduit 23 or to sense a change of another kind in the liquid flowing through the conduit.
  • the control equipment 29 of the centrifugal separator is informed of this sensing and then functions, in a previously described manner, so that the rotor peripheral outlets 11 are uncovered to discharge separated sediment.
  • the so-called special liquid may be supplied to the rotor in other ways than described here. It is also possible to omit the pumping arrangement for the circulation of liquid through the conduit 23.
  • the position of the interface fon'ned in the rotor between separated liquid component and said special liquid can be sensed in otherways, as by means of members placed within or at the outside of the rotor. If the liquid pressure in chamber 21 is chosen as the value indicating the position of the said interface, this pressure can be sensed by pumping in air at a suitable level below the liquid surface formed in the chamber 21, a change of resistance to thus supply of air being'measured.
  • FIG. 3 there is schematically shown a previously known arrangement for sensing the dielectric constant of a liquid flowing through a conduit.
  • This equipment comprises a sensing member 33 arranged in the eonduit, and an indicator 35 connected to a source of power 34 and including an oscillator.
  • the indiator is connected on one hand to the sensing member-33 and on the other hand to the conduit 23, through which the liquid to be sensed is flowing.
  • this equipment is conventional, there is no need for any further description of it here.
  • a centrifugal separator comprising a rotor having a separating chamber provided with an inlet for a mixture to be separated, said mixture including a liquid component and sediment, the separating chamber having a central outlet for said liquid component separated from the mixture, said chamber also having peripheral outlets for said sediment separated from said mixture, control means for alternately closing and opening said pripheral outlets during operation of the rotor, a source of special liquid having a density greater than that of said liquid component but smaller than that of said sediment, and means for charging the separating chamber with said special liquid, whereby an interface is formed in said chamber between said separated liquid component and said special liquid, the separator being characterized by means for sensing when said interface has moved radially inward to a predetermined level in the separating chamber.
  • a separator according to claim 1 comprising also means operatively connected to said sensing means, and responsive to said sensing, for actuating said control means to open said peripheral outlets.
  • a separator according to claim 1 in which said charging means are operable to feed said special liquid to the rotor at a predetermined rate.
  • a separator according to claim 1 in which said charging means areoperable to feed said special liquid continuously to the rotor.
  • sensing means include a device for sensing a difference between said separatedv liquid component and said special liquid.
  • a separator accordingto claim 5 in which said device is operable to sense a difference between the dielectric constants of said liquid component and said special liquid.
  • a separator according to claim 7, comprising also a conduit for supplying said mixture to said rotor inlet, said channel having its outlet end in communication with said conduit.

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  • Centrifugal Separators (AREA)
US00204625A 1970-12-07 1971-12-03 Control means for self-discharging centrifuge Expired - Lifetime US3750940A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE16514/70D SE345603B (ja) 1970-12-07 1970-12-07

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US (1) US3750940A (ja)
JP (1) JPS5648217B1 (ja)
DE (1) DE2160476A1 (ja)
FR (1) FR2117188A5 (ja)
GB (1) GB1315250A (ja)
IT (1) IT941789B (ja)
SE (1) SE345603B (ja)
SU (1) SU597323A3 (ja)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1982002153A1 (en) * 1980-12-23 1982-07-08 Co Inc Donaldson Self-purging centrifuge
US4347971A (en) * 1977-03-03 1982-09-07 Joy Manufacturing Company Centrifuge apparatus
US4392846A (en) * 1981-05-18 1983-07-12 Joy Manufacturing Company Centrifuge apparatus
US4432748A (en) * 1976-09-03 1984-02-21 Joy Manufacturing Company Centrifuge apparatus and method of operating a centrifuge
US4475897A (en) * 1982-07-28 1984-10-09 Westfalia Separator Ag Method of and apparatus for optimizing the clarified phase and concentration of solids in a continuous solids-discharge centrifuge
US4525155A (en) * 1983-04-20 1985-06-25 Alfa-Laval Marine And Powering Engineering Ab Centrifugal separator and method of operating the same
US4643709A (en) * 1985-05-01 1987-02-17 Alfa-Laval, Inc. Method of operating nozzle centrifuges
US4662866A (en) * 1984-12-12 1987-05-05 Alfa-Laval Ab Arrangement for controlling discharge of a separated component from a centrifuge
US4662867A (en) * 1984-12-12 1987-05-05 Alfa-Laval Ab Outlet arrangement for centrifuges
US4718886A (en) * 1986-02-05 1988-01-12 Westfalia Separator Ag Continuous-operation centrifuge bowl for concentrating suspended solids
US5318500A (en) * 1992-10-15 1994-06-07 Eli Lilly And Company Method for controlling intermittently discharged centrifuges
US6346069B1 (en) 1999-08-06 2002-02-12 Separation Process Technology, Inc. Centrifugal pressurized separators and methods of controlling same
WO2003064053A1 (en) * 2002-01-25 2003-08-07 Econova Inc. Methods for centrifugally separating mixed components of a fluid stream
US6607473B2 (en) * 1999-08-06 2003-08-19 Econova Inc. Methods for centrifugally separating mixed components of a fluid stream under a pressure differential
US6719681B2 (en) 1999-08-06 2004-04-13 Econova, Inc. Methods for centrifugally separating mixed components of a fluid stream
US20080171645A1 (en) * 2005-03-08 2008-07-17 Alfa Laval Corporate Ab Centrifugal Separator
US20100184579A1 (en) * 2007-06-30 2010-07-22 Traeger Kim Three-phase separator
US20130029828A1 (en) * 2010-01-29 2013-01-31 Alfa Laval Corporate Ab System comprising centrifugal separator and method for controlling such a system
US20130065744A1 (en) * 2010-03-19 2013-03-14 Per Karlsson Device and method for monitoring and adjusting the radial position of an interface layer in a nozzle centrifuge
US20150149098A1 (en) * 2013-11-12 2015-05-28 SYNCRUDE CANADA LTD. in trust for the owners of the Syncrude Project, as such owners exist now and Method of detecting and controlling e-line loss
CN113164977A (zh) * 2018-12-10 2021-07-23 阿法拉伐股份有限公司 离心分离器和用于消除离心分离器中的气锁的方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3314859A1 (de) * 1983-04-23 1984-10-25 Westfalia Separator Ag, 4740 Oelde Verfahren und vorrichtung zur zentrifugalen reinigung von gebrauchten mineraloelen
DE3601814A1 (de) * 1986-01-22 1987-07-23 Westfalia Separator Ag Verfahren und vorrichtung zum trennen von zwei fluessigen phasen mittels einer zentrifuge
SE503017C2 (sv) * 1994-07-22 1996-03-11 Tetra Laval Holdings & Finance Sätt och anordning för övervakning av centrifugalseparator

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3189268A (en) * 1961-12-22 1965-06-15 Ab Device for determining the position of the interface between two separated components in a centrifugal separator
US3261546A (en) * 1962-10-29 1966-07-19 Pfaudler Permutit Inc Method for clarifying fats and oils
US3301476A (en) * 1963-01-26 1967-01-31 Westfalia Separator Ag Apparatus for signaling a predetermined level in the sludge chamber of a centrifugaldrum
US3396910A (en) * 1965-08-17 1968-08-13 Westfalia Separator Ag Method and apparatus for sensing the fullness of the mud chamber in a centrifugal separator
US3410479A (en) * 1965-08-23 1968-11-12 Alfa Laval Ab Sludge level indicating device for centrifugal separators
US3445061A (en) * 1966-11-14 1969-05-20 Alfa Laval Ab Apparatus for indicating sludge level in centrifuges
US3508704A (en) * 1967-02-08 1970-04-28 Westfalia Separator Ag Centrifugal separator control
GB1203177A (en) * 1967-10-31 1970-08-26 Alfa Laval Ab Discharge arrangement in connection with centrifugals separators

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL280990A (ja) * 1961-09-29

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3189268A (en) * 1961-12-22 1965-06-15 Ab Device for determining the position of the interface between two separated components in a centrifugal separator
US3261546A (en) * 1962-10-29 1966-07-19 Pfaudler Permutit Inc Method for clarifying fats and oils
US3301476A (en) * 1963-01-26 1967-01-31 Westfalia Separator Ag Apparatus for signaling a predetermined level in the sludge chamber of a centrifugaldrum
US3396910A (en) * 1965-08-17 1968-08-13 Westfalia Separator Ag Method and apparatus for sensing the fullness of the mud chamber in a centrifugal separator
US3410479A (en) * 1965-08-23 1968-11-12 Alfa Laval Ab Sludge level indicating device for centrifugal separators
US3445061A (en) * 1966-11-14 1969-05-20 Alfa Laval Ab Apparatus for indicating sludge level in centrifuges
US3508704A (en) * 1967-02-08 1970-04-28 Westfalia Separator Ag Centrifugal separator control
GB1203177A (en) * 1967-10-31 1970-08-26 Alfa Laval Ab Discharge arrangement in connection with centrifugals separators

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4432748A (en) * 1976-09-03 1984-02-21 Joy Manufacturing Company Centrifuge apparatus and method of operating a centrifuge
US4347971A (en) * 1977-03-03 1982-09-07 Joy Manufacturing Company Centrifuge apparatus
WO1982002153A1 (en) * 1980-12-23 1982-07-08 Co Inc Donaldson Self-purging centrifuge
US4350282A (en) * 1980-12-23 1982-09-21 Donaldson Company, Inc. Self-purging centrifuge
US4392846A (en) * 1981-05-18 1983-07-12 Joy Manufacturing Company Centrifuge apparatus
US4475897A (en) * 1982-07-28 1984-10-09 Westfalia Separator Ag Method of and apparatus for optimizing the clarified phase and concentration of solids in a continuous solids-discharge centrifuge
US4525155A (en) * 1983-04-20 1985-06-25 Alfa-Laval Marine And Powering Engineering Ab Centrifugal separator and method of operating the same
US4662866A (en) * 1984-12-12 1987-05-05 Alfa-Laval Ab Arrangement for controlling discharge of a separated component from a centrifuge
US4662867A (en) * 1984-12-12 1987-05-05 Alfa-Laval Ab Outlet arrangement for centrifuges
US4643709A (en) * 1985-05-01 1987-02-17 Alfa-Laval, Inc. Method of operating nozzle centrifuges
US4718886A (en) * 1986-02-05 1988-01-12 Westfalia Separator Ag Continuous-operation centrifuge bowl for concentrating suspended solids
US5318500A (en) * 1992-10-15 1994-06-07 Eli Lilly And Company Method for controlling intermittently discharged centrifuges
US20040192533A1 (en) * 1999-08-06 2004-09-30 Econova, Inc. Centrifugal separators
US6607473B2 (en) * 1999-08-06 2003-08-19 Econova Inc. Methods for centrifugally separating mixed components of a fluid stream under a pressure differential
US6719681B2 (en) 1999-08-06 2004-04-13 Econova, Inc. Methods for centrifugally separating mixed components of a fluid stream
US6346069B1 (en) 1999-08-06 2002-02-12 Separation Process Technology, Inc. Centrifugal pressurized separators and methods of controlling same
US7060017B2 (en) 1999-08-06 2006-06-13 Econova, Inc. Centrifugal separators
US20060217255A1 (en) * 1999-08-06 2006-09-28 Econova, Inc. Method for separating particulate matter from a fluid stream
US7314441B2 (en) 1999-08-06 2008-01-01 Econova, Inc. Method for separating particulate matter from a fluid stream
WO2003064053A1 (en) * 2002-01-25 2003-08-07 Econova Inc. Methods for centrifugally separating mixed components of a fluid stream
US7485084B2 (en) 2005-03-08 2009-02-03 Alfa Laval Corporate Ab Apparatus and method for controlling the radial level of an interface in a centrifugal separator
US20080171645A1 (en) * 2005-03-08 2008-07-17 Alfa Laval Corporate Ab Centrifugal Separator
US20100184579A1 (en) * 2007-06-30 2010-07-22 Traeger Kim Three-phase separator
US8628458B2 (en) * 2007-06-30 2014-01-14 Gea Mechanical Equipment Gmbh Three-phase separator having an overflow outlet for one phase and a centripetal pump for another phase
US20130029828A1 (en) * 2010-01-29 2013-01-31 Alfa Laval Corporate Ab System comprising centrifugal separator and method for controlling such a system
US9186687B2 (en) * 2010-01-29 2015-11-17 Alfa Laval Corporate Ab Centrifugal separator with pressure or recirculation control or monitoring devices
US20130065744A1 (en) * 2010-03-19 2013-03-14 Per Karlsson Device and method for monitoring and adjusting the radial position of an interface layer in a nozzle centrifuge
US8702576B2 (en) * 2010-03-19 2014-04-22 Alfa Laval Corporate Ab Device and method for monitoring and adjusting the radial position of an interface layer in a nozzle centrifuge
US20150149098A1 (en) * 2013-11-12 2015-05-28 SYNCRUDE CANADA LTD. in trust for the owners of the Syncrude Project, as such owners exist now and Method of detecting and controlling e-line loss
US9400196B2 (en) * 2013-11-12 2016-07-26 Syncrude Canada Ltd. Method of detecting and controlling E-line loss in a centrifuge
CN113164977A (zh) * 2018-12-10 2021-07-23 阿法拉伐股份有限公司 离心分离器和用于消除离心分离器中的气锁的方法
US11311889B2 (en) * 2018-12-10 2022-04-26 Alfa Laval Corporate Ab Centrifugal separator and method for eliminating air locks in a centrifugal separator

Also Published As

Publication number Publication date
SU597323A3 (ru) 1978-03-05
SE345603B (ja) 1972-06-05
DE2160476A1 (de) 1972-06-15
GB1315250A (en) 1973-05-02
JPS5648217B1 (ja) 1981-11-14
IT941789B (it) 1973-03-10
FR2117188A5 (ja) 1972-07-21

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