US3902658A - Ultra centrifugal cascade - Google Patents

Ultra centrifugal cascade Download PDF

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Publication number
US3902658A
US3902658A US258823A US25882372A US3902658A US 3902658 A US3902658 A US 3902658A US 258823 A US258823 A US 258823A US 25882372 A US25882372 A US 25882372A US 3902658 A US3902658 A US 3902658A
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United States
Prior art keywords
rotors
separator
perforations
groups
plate
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Expired - Lifetime
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US258823A
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English (en)
Inventor
Kristian Dahl Madsen
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ABB Norden Holding AB
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ASEA AB
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B5/00—Other centrifuges
    • B04B5/08—Centrifuges for separating predominantly gaseous mixtures
    • 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
    • Y10S423/00—Chemistry of inorganic compounds
    • Y10S423/07—Isotope separation
    • 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
    • Y10S494/00—Imperforate bowl: centrifugal separators
    • Y10S494/90—Imperforate bowl: centrifugal separators involving mixture containing one or more gases

Definitions

  • the present invention relates to an ultra centrifugal cascade, complete or partial, in a common outer vessel.
  • the present invention provides a solution of these and other similar problems and is characterized in that several, possibly all the ultra centrifugal rotors and possibly also their drive members are attached in common upper and lower perforated plates arranged inside an outer vessel common for the centrifuges.
  • Such a construction utilizes the space inside the vessel to the full while at the same time providing satisfactory stability in relation to the vessel and between the centrifuges.
  • the arrangement of the centrifuges in groups, with intermediate protection in the form of protective plates or rows of protective tubes, is'simple and the mutual configuration of the groups can be selected in many dif ferent ways without the need for reconstruction.
  • the arrangement of the centrifuges in this way in a common vessel also means that the wall thickness of protective plates and casing plate will be as great as the plate thickness which would be required to protect a single centrifuge and, therefore, the arrangement according to the invention also involves a considerable saving in material.
  • FIG. 1 is a section through a centrifuge
  • FIG. 2 a cascade vessel, partly exposed, I
  • FIG. 3 a cross-section through a cascade vessel
  • FIG. 4 a pipe-laying diagram for a cascade and FIG. 5 a cooling system for a cascade.
  • FIG. 6 shows a cascade connection diagram
  • FIG. 1 shows a single, vertical centrifuge C which is part of a cascade (see below).
  • a hollow rotor consisting of a cylindrical part 17 and two end pieces 14 and 15, is journalled in an upper perforated plate 33 via one of its perforations 33a.
  • the rotor is driven by an asynchronous motor (rotor 12, stator 13) or other drive means and the lower part of the non-rotative motor box 13a is attached in a lower perforated plate 29 (or grid plate 29) via one of its perforations 29a.
  • Lubrication is arranged via a lubricant storage space in a depending chamber 20 containing a lubricant wick 21 extending to the lower rotor bearing 19.
  • the upper and lower perforated plates and 29, respectively, are held together by support pipes 32.
  • the centrifuge rotor is journalled at its top in an upper electromagnetic bearing 22 supported on the upper plate 36 via its upper surface.
  • the gas or isotope mixture to be separated is introduced through thepipe 23, possibly coming from .a previous centrifuge or group or centrifuges in a cascade, and the concentrated gas is removed through the con duit 24, the depleted gas being removed through the conduit 25.
  • the gas is withdrawn from the interior of the rotor R through exhausts 27 and 28.
  • the motor stator 13 is attached in the motor box 13a the latter having a flange 18 attached to the lower perforated plate 29 via its lower surface.
  • An upstanding tube 16 connected to the top of the bearing 22, houses the conduits 23, 24,and 25 and mounts the exhausts 27 and 28 nonrotatively via the tube 26.
  • FIG. 2 shows a vessel for a centrifugal cascade with the various centrifuges C attached in the upper and lower perforated plates 36 and 29, respectively, and the whole cascade arranged inside the cylindrical containment casing37.
  • the individual centrifuges are shown at C, vertically positioned and parallel to each other, the casings axis being vertical.
  • FIG. 3 shows in cross-section a centrifugal cascade such as illustrated by FIG. 2, having rows of protective vertical tubes 40 which separate groups of the centrifuges C from other groups of these centrifuges so that a break down of one centrifuge will not cause any damage except possibly to those centrifuges within the same limited group within the cascade, the others being protected by the row of protective tubes 40.
  • the rows of protective tubes may be replaced by protective plates. This means of protection gives the advantage that whereas a protection was previously required around each centrifuge, such protection is now sufficient only at the outer walls of the vessel and/or between groups of centrifuges, which is a considerable saving in material.
  • FIG. 6 shows diagrammatically the invention used as an ultra centrifugal cascade in which U 0.71 percent is to be separated so that concentrated U is obtained. U is also contained in the depleting part.
  • Unseparated gas or isotope mixture
  • Unseparated gas is introduced at 42 and initially separated in fourteen centrifuges operating inparallel as indicated by the upper box 14, after which the partially enriched gas mixture is fed in the enriching direction (upwards in the figure) to the next layer or group in the cascade which has ten centrifuges operating in parallel as indicated by the upper box 10.
  • the number is fewer here because the quantity of gas is less as indicated by .the encircled numerals representing flow. quantity.
  • Depleted gas is carried at 24 to the nearestpreceding group where it is introduced at 23 and en riched again.
  • the enriched gas contains 2.1 percent U It is seen that depleted gas in all the groups is led to a preceding centrifuge in the cascade direction.
  • Depleted gas 0.25 percent U is removed from the three centrifuges, represented by the lower box 14, furthest away in the depletion direction, which operate in parallel.
  • the underlined number in each .of the boxes represents the number of centrifuges of FIG. 1, connected in parallel to form a cascade stage in all of the above.
  • FIG. 4 shows the pipe system for gas transfer between the various cascade groups, in principle in accordance with FIG. 6.
  • Natural UF is supplied to a cascade at 44 and from this branching point the gas mixture is introduced to common pipe conduits (main conduits) for several centrifuges within the same group.
  • the various groups are designated 1 to 11 in FIG. 4, one figuredenoting centrifuges belonging to the same group but in this case not indicating groups of centricentrifuges operating in parallel and in the enriching direction the partically U enriched gas is taken out through conduits 46 and 47, connection details not shown but being the same as in the depleting direction and shown at 23, 24 and 25 in that instance.
  • all complicated pipe-laying is avoided using a large number of pipes, and all pipes are located within the casing 37. This means that any leakage at pipe joints will only have any effect inside the cascade vessel.
  • Depleted gas is removed at 48 from group 1, enriched gas at 49 from group 11.
  • the cooling system is shown in FIG. and consists of a number of horizontal tubes 30 and 31 which run in contact with the upper and lower horizontal perforated plates 29, 36 (see FIG. 1), not vertically along the length of the centrifuges between the perforated plates.
  • the number of cooling systems is thus reduced to one per cascade instead of requiring one per centrifuge.
  • centrifuges lying nearest the cascade inlet are provided with perforations for vertical passage of the tubes 30 and 31 through the perforated plates 29 and 36.
  • a pressure gauge is suitably introduced in the outer vessel to indicate if one or more of the centrifuges stops functioning. The reason is that a centrifuge unit which has stopped functioning gives greater pressure leakage than one which is rotating.
  • the upper perforated plate 36 has an aperture, or perforation, 33a for each centrifuge unit C, said aperture having a diameter slightly greater than that of the centrifuge cylinder, so that the cylinder can be passed through the aperture.
  • the magnetic bearing stator of the centrifuge unit (at 22) has greater diameter than said aperture and is firmly bolted to the upper side of the upper plate (FIG. 1).
  • the tube or hold er 16 for the stationary inner parts of the centrifuge unit is formly bolted to the upper side of the perforated plate via the said magnet bearing stator.
  • centrifuge unit bearing casing (18) and bearing box .are attached to said lower perforated plate 29, and are removable via the aperture 29a (FIG. 1
  • the vertically positioned centrifuge units are suitably arranged in transverse, parallel rows (FIG. 3) in the cascade ves sel and are connected so that the centrifuge units in one and the same row process uranium hexafluoride having almost the same concentration.
  • Collection tubes (46,47) for uranium hexafluoride (FIG. 4) having approximately the same concentration are arranged ,in parallel with said rows.
  • the shortest of said rows on one side of the cascade vessel (11, FIG.
  • the short row (1) opposite said row (1 l is connected in similar manner to the outer main conduit for enriched uranium (48 FIG. 4) and at least one of the longer rows (3 8) positioned substantially cen-, trally between said two short rows, which are diametrically opposite to each other, comprises a number of centrifugal units which are connected by pipes 45 to the outer main conduit for the supply of uranium hexafluoride having the isotope content of the starting material.
  • the cascade containment vessel 37 forms internally enclosed spaces above and below the horizontal perfoupper one of these spaces, above the upper plate 36, asv
  • each centrifuge has its own individual bearing system and driving motor, each forming a unit that can be installed in any.of the perforations of the perforated plates, in any grouping desiredv
  • These perforations are formed as pairs of perforations which are axially aligned vertically and to which the rotor bearing and motors of the centrifuges are applied removably.
  • An ultra centrifugal separator comprising a plurality of ultra centrifugal vertical rotors clustered together, upper and lower plates positioned above and below said rotors and forming upper and lower perforations aligned with the rotors in each instance, said rotors each having a top end piece forming a hollow extension having an open top and porjecting upwardly at least partially into the one of said upper perforations with which the rotor is aligned in each instance, bearings mounted by said upper plate and journaling said rotors via their said extensions in each instance and with their said open tops unobstructed, said rotors each having a closed bottom piece, motors mounted by said lower plate in said' lower perforations and journaling and driving said rotors in each instance via their said bottom pieces, and a single protective containment vessel for said separator and having a side wall peripherally surrounding all of said clustered rotors and a top wall covering said upper plate and forming an enclosed space above said upper plate and the open top

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  • Centrifugal Separators (AREA)
US258823A 1971-06-07 1972-06-01 Ultra centrifugal cascade Expired - Lifetime US3902658A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE07308/71A SE354200B (de) 1971-06-07 1971-06-07

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US (1) US3902658A (de)
DE (1) DE2227317A1 (de)
GB (1) GB1383124A (de)
SE (1) SE354200B (de)

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4167244A (en) * 1976-11-11 1979-09-11 Exxon Nuclear Company, Inc. Gas-centrifuge unit and centrifugal process for isotope separation
US4193775A (en) * 1976-07-27 1980-03-18 Wang Chia Gee Methods and apparatus for separating gases with ventilated blades
US4290781A (en) * 1977-08-15 1981-09-22 Wang Chia Gee Methods and apparatus for separating gases with ventilated blades
US5417944A (en) * 1982-03-29 1995-05-23 Husian; Mohammad Q. Centrifuge process to separate the isotopes of uranium hexafluoride
US5505684A (en) * 1994-08-10 1996-04-09 Piramoon Technologies, Inc. Centrifuge construction having central stator
US20040112800A1 (en) * 2002-12-17 2004-06-17 Hideki Ogino Centrifugal extractor of non-contact journaled construction
US20070227357A1 (en) * 2006-03-31 2007-10-04 Mcdermott Wayne T Turbomolecular pump system for gas separation
US10914274B1 (en) 2019-09-11 2021-02-09 General Electric Company Fuel oxygen reduction unit with plasma reactor
US11015534B2 (en) 2018-11-28 2021-05-25 General Electric Company Thermal management system
US11085636B2 (en) 2018-11-02 2021-08-10 General Electric Company Fuel oxygen conversion unit
US11131256B2 (en) 2018-11-02 2021-09-28 General Electric Company Fuel oxygen conversion unit with a fuel/gas separator
US11148824B2 (en) 2018-11-02 2021-10-19 General Electric Company Fuel delivery system having a fuel oxygen reduction unit
US11161622B2 (en) 2018-11-02 2021-11-02 General Electric Company Fuel oxygen reduction unit
US11186382B2 (en) 2018-11-02 2021-11-30 General Electric Company Fuel oxygen conversion unit
US11193671B2 (en) 2018-11-02 2021-12-07 General Electric Company Fuel oxygen conversion unit with a fuel gas separator
US11319085B2 (en) 2018-11-02 2022-05-03 General Electric Company Fuel oxygen conversion unit with valve control
US11391211B2 (en) 2018-11-28 2022-07-19 General Electric Company Waste heat recovery system
US11420763B2 (en) 2018-11-02 2022-08-23 General Electric Company Fuel delivery system having a fuel oxygen reduction unit
US11434824B2 (en) 2021-02-03 2022-09-06 General Electric Company Fuel heater and energy conversion system
US11447263B2 (en) 2018-11-02 2022-09-20 General Electric Company Fuel oxygen reduction unit control system
US11542870B1 (en) 2021-11-24 2023-01-03 General Electric Company Gas supply system
US11577852B2 (en) 2018-11-02 2023-02-14 General Electric Company Fuel oxygen conversion unit
US11591965B2 (en) 2021-03-29 2023-02-28 General Electric Company Thermal management system for transferring heat between fluids
US11773776B2 (en) 2020-05-01 2023-10-03 General Electric Company Fuel oxygen reduction unit for prescribed operating conditions
US11774427B2 (en) 2019-11-27 2023-10-03 General Electric Company Methods and apparatus for monitoring health of fuel oxygen conversion unit
US11851204B2 (en) 2018-11-02 2023-12-26 General Electric Company Fuel oxygen conversion unit with a dual separator pump
US11866182B2 (en) 2020-05-01 2024-01-09 General Electric Company Fuel delivery system having a fuel oxygen reduction unit
US11906163B2 (en) 2020-05-01 2024-02-20 General Electric Company Fuel oxygen conversion unit with integrated water removal
US12005377B2 (en) 2021-06-15 2024-06-11 General Electric Company Fuel oxygen reduction unit with level control device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2623729B1 (fr) * 1973-01-16 1990-09-28 Commissariat Energie Atomique Multi machine de centrifugation
CN108479091A (zh) * 2018-05-22 2018-09-04 安徽瑞旭搅拌设备有限公司 一种恒流式搅拌机

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2663718A (en) * 1950-04-20 1953-12-22 Laval Separator Co De Clarification of distillery slop and the like
US2779537A (en) * 1950-08-01 1957-01-29 Samuel D Jarvis Fluid contacting apparatus
US2936110A (en) * 1945-01-31 1960-05-10 Cohen Karl Method of centrifuge operation
US2947472A (en) * 1944-09-20 1960-08-02 Skarstrom Charles Centrifuge apparatus
US3052504A (en) * 1960-03-17 1962-09-04 Reactor Centrum Nederland Point bearings for the support of a rotor rotating with high speed
US3281067A (en) * 1959-08-28 1966-10-25 Beyerle Konrad Gas centrifuge with rotating drum
US3309016A (en) * 1965-11-04 1967-03-14 Paul R O'brien Desalinization of salt water and apparatus therefor

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2947472A (en) * 1944-09-20 1960-08-02 Skarstrom Charles Centrifuge apparatus
US2936110A (en) * 1945-01-31 1960-05-10 Cohen Karl Method of centrifuge operation
US2663718A (en) * 1950-04-20 1953-12-22 Laval Separator Co De Clarification of distillery slop and the like
US2779537A (en) * 1950-08-01 1957-01-29 Samuel D Jarvis Fluid contacting apparatus
US3281067A (en) * 1959-08-28 1966-10-25 Beyerle Konrad Gas centrifuge with rotating drum
US3052504A (en) * 1960-03-17 1962-09-04 Reactor Centrum Nederland Point bearings for the support of a rotor rotating with high speed
US3309016A (en) * 1965-11-04 1967-03-14 Paul R O'brien Desalinization of salt water and apparatus therefor

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4193775A (en) * 1976-07-27 1980-03-18 Wang Chia Gee Methods and apparatus for separating gases with ventilated blades
US4167244A (en) * 1976-11-11 1979-09-11 Exxon Nuclear Company, Inc. Gas-centrifuge unit and centrifugal process for isotope separation
US4290781A (en) * 1977-08-15 1981-09-22 Wang Chia Gee Methods and apparatus for separating gases with ventilated blades
US5417944A (en) * 1982-03-29 1995-05-23 Husian; Mohammad Q. Centrifuge process to separate the isotopes of uranium hexafluoride
US5505684A (en) * 1994-08-10 1996-04-09 Piramoon Technologies, Inc. Centrifuge construction having central stator
US20040112800A1 (en) * 2002-12-17 2004-06-17 Hideki Ogino Centrifugal extractor of non-contact journaled construction
US6976947B2 (en) * 2002-12-17 2005-12-20 Japan Nuclear Cycle Development Institute Centrifugal extractor of non-contact journaled construction
US20070227357A1 (en) * 2006-03-31 2007-10-04 Mcdermott Wayne T Turbomolecular pump system for gas separation
US11085636B2 (en) 2018-11-02 2021-08-10 General Electric Company Fuel oxygen conversion unit
US11193671B2 (en) 2018-11-02 2021-12-07 General Electric Company Fuel oxygen conversion unit with a fuel gas separator
US11577852B2 (en) 2018-11-02 2023-02-14 General Electric Company Fuel oxygen conversion unit
US11131256B2 (en) 2018-11-02 2021-09-28 General Electric Company Fuel oxygen conversion unit with a fuel/gas separator
US11148824B2 (en) 2018-11-02 2021-10-19 General Electric Company Fuel delivery system having a fuel oxygen reduction unit
US11161622B2 (en) 2018-11-02 2021-11-02 General Electric Company Fuel oxygen reduction unit
US11186382B2 (en) 2018-11-02 2021-11-30 General Electric Company Fuel oxygen conversion unit
US11851204B2 (en) 2018-11-02 2023-12-26 General Electric Company Fuel oxygen conversion unit with a dual separator pump
US11319085B2 (en) 2018-11-02 2022-05-03 General Electric Company Fuel oxygen conversion unit with valve control
US11447263B2 (en) 2018-11-02 2022-09-20 General Electric Company Fuel oxygen reduction unit control system
US11420763B2 (en) 2018-11-02 2022-08-23 General Electric Company Fuel delivery system having a fuel oxygen reduction unit
US11945600B2 (en) 2018-11-02 2024-04-02 General Electric Company Fuel delivery system having a fuel oxygen reduction unit
US11391211B2 (en) 2018-11-28 2022-07-19 General Electric Company Waste heat recovery system
US11506131B2 (en) 2018-11-28 2022-11-22 General Electric Company Thermal management system
US11015534B2 (en) 2018-11-28 2021-05-25 General Electric Company Thermal management system
US10914274B1 (en) 2019-09-11 2021-02-09 General Electric Company Fuel oxygen reduction unit with plasma reactor
US11774427B2 (en) 2019-11-27 2023-10-03 General Electric Company Methods and apparatus for monitoring health of fuel oxygen conversion unit
US11773776B2 (en) 2020-05-01 2023-10-03 General Electric Company Fuel oxygen reduction unit for prescribed operating conditions
US11866182B2 (en) 2020-05-01 2024-01-09 General Electric Company Fuel delivery system having a fuel oxygen reduction unit
US11906163B2 (en) 2020-05-01 2024-02-20 General Electric Company Fuel oxygen conversion unit with integrated water removal
US11767793B2 (en) 2021-02-03 2023-09-26 General Electric Company Fuel heater and energy conversion system
US11434824B2 (en) 2021-02-03 2022-09-06 General Electric Company Fuel heater and energy conversion system
US11591965B2 (en) 2021-03-29 2023-02-28 General Electric Company Thermal management system for transferring heat between fluids
US12005377B2 (en) 2021-06-15 2024-06-11 General Electric Company Fuel oxygen reduction unit with level control device
US11542870B1 (en) 2021-11-24 2023-01-03 General Electric Company Gas supply system
US11879392B2 (en) 2021-11-24 2024-01-23 General Electric Company Gas supply system

Also Published As

Publication number Publication date
SE354200B (de) 1973-03-05
DE2227317A1 (de) 1972-12-28
GB1383124A (en) 1975-02-05

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