US3771715A - Self-cleaning centrifugal separator - Google Patents

Self-cleaning centrifugal separator Download PDF

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Publication number
US3771715A
US3771715A US00201314A US3771715DA US3771715A US 3771715 A US3771715 A US 3771715A US 00201314 A US00201314 A US 00201314A US 3771715D A US3771715D A US 3771715DA US 3771715 A US3771715 A US 3771715A
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US
United States
Prior art keywords
membrane
drum
centrifugal separator
sections
fluid
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Expired - Lifetime
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US00201314A
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English (en)
Inventor
M Baram
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Sulzer Escher Wyss AG
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Escher Wyss AG
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Publication date
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B15/00—Other accessories for centrifuges
    • B04B15/06—Other accessories for centrifuges for cleaning bowls, filters, sieves, inserts, or the like
    • 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
    • B04B11/04—Periodical feeding or discharging; Control arrangements therefor

Definitions

  • the present invention relates to new fluid controlled annular membrane linings to be used in particular but not exclusively in connection with a centrifugal separator with conical bowl and usually supported in a horizontal position where the precipitated sludge of a fluidsludge mixture is conveyed to the narrow end of the bowl to one or several ejection openings, while the fluid phase leaves the bowl via the wide end. It is known in the art to employ centrifugal separators with a bowl of a generally conical shape and incorporating a conveyor screw in a coaxial position.
  • the object of the present invention is to eliminate conveyor screw and differential gears, and to substitute instead one or several membrane liningsof a suitably resilient and or pliable material capable to generate pulsating movements in a predetermined direction and able to propel precipitated sludge and solids in a predetermined direction.
  • Another object of the invention is to provide a centrifugal bowl furnished with adjacent open annular grooves which in connection with the annular membrane linings or lining form annular pockets for sludge. and solids when deflated, and profilated chambers with slanting outer surfaces when inflated by a control fluid respectively.
  • a further object of the invention is to provide an advantageous hydraulic system incorporated in the bowl and or the membrane lining to generate predetermined pulsation sequences.
  • FIG. 2 is an enlarged diagrammatic detail in vertical sectional view of the bowl with membrane lining illustrating by way of examplea way of securing the lining to the bowl;
  • FIG. 3 is a diagrammatical sectional view'of a special type of lining attached to a bowl without said annular grooves;.and
  • FIG. 4 is a diagrammatical sectional view of another embodiment according to the invention.
  • FIG. 1 a centrifugalseparator bowl 1 with end sections 2 and'3 which are furnished with hollow shafts 4 and 5 respectively, said bowl and shafts l, 2, 3 rotating in connection with suitable bearings, supports and driving means not shown in the drawing;
  • the inner surface of bowl 1 is furnished with adjacent open annular grooves 6 each being covered by an annular membrane lining 7. All liningswill preferably be integ'rated into one single membrane lining 8 as indicated in the drawing made of a suitably pliable and or elastic material.
  • the individual membrane linings 7 are shown'altematingly in a deflated and in an inflated condition, thus either forming a kind of annular pocket together with grooves 6 or forming inflated chambers under the influence of a control fluid in- I jected through, channels 9 belonging to control fluid I clean phase leavesthe bowl 1 through openings 19 while the sludge is ejected through openings 20.
  • the'control fluid linings 7 will be inflated to form outer surfaces 21 which slant downwardly in the direction of ejection openings '20.
  • FIG. 2 exemplifies means of securing membrane lin ings 7 or lining 8 to the bowl 1.
  • a further narrow groove is provided to house a suitably formed part or lip of linings .7 or 8 respectively under the pressure of an expandable ring 22 of steel or other suitably resilient and strong material. Rings 22 may have advantageous slanting outer surfaces.
  • FIG-3 illustrates the-employment of an outer lining 23 preferably of the same material as the membrane linings 7 or 8 respectively, these parts being bonded together by way of example by welding along seams 24.
  • the outer lining 23 needs only to be fastened at its ends near end sections 2 and 3. Thus, the inside of bowl 1 needs no expensive machining.
  • bowl 1 is shown to include an alternative fluid conduit 25 which is in direct connection with the first channel 9 and from there through a short length of conduit 11 to chamber 13.
  • a bowl of this type has neither chamber 12, conduit 10 with its channels 9 and valve 16 nor the rest of conduit 11.
  • Pipe 14 is'not needed.
  • Conduits 25 may be holes interconnecting grooves 6 or open channels milled through the tops of the grooves.
  • centrifugal separator may work as follows:
  • the bowl 1 incorporates only control fluid conduit 26 with one channel and part of conduit 10 with chamber 12 and supply pipe 15, the transportation of the sludge will be obtained by intermittent opening and closing of pipe 15. As pipe 15 is opened, the control fluid will run through said conduits into the first groove 6. Conduits 26 must be dimensioned in such a manner that the first membrane lining is expanded entirely before the adjacent membrane lining changes considerably from its pocket shape inside groove 6. In this manner, membrane linings 7'will expand one after the other like a wave rolling through the length of bowl 1 propelling all the deposited sludge before it towards openings 20.
  • the scope of the present invention is not necessarily limited to parallel annular grooves 6. Especially in connection with said wave-principle propulsion, it is possible to use one single groove spiralling through the length of the bowl beginning in connection with channel 9 and ending blindly near openings 20. This feature applies also to the embodiment shown in FIG. 3.
  • the scope of the present invention also embraces the employmentof a membranelining which is inflatable in a rolling wave fashion without any grooves'either in the wall of the bowl or integrated in outerlining 23. In that case, the lining will have suitably elastic and or pliable parts either parallel and adjacent to each other or in the shape of a spiral acting as a rolling wave by expanding pro gressively under the influence of the progressively advancing control fluid as described above.
  • a centrifugal separator comprising a conical bowl having an inner surface presenting a wide end and a narrow end opposite thereto, means for delivering a fluid-sledge mixture into said bowl, in which the bowl is provided with discharge opening means at said wide end for discharging fluid phase of said mixture and discharge means at said narrowfend for discharging a precipitated sludge of said fluid-sludge mixture while the fluid phase leaves the bowl via the wide end, a plurality of ring-shaped elastic membrane sections covering said inner wall of the bowl, means engaging opposite ends of said sections in fluid tight relation to said inner surface for allowing said sections to be inwardly flexed therebetween, the bowl being provided with an opening below each membrane section, and means connected with said openings for the supply and the withdrawal of a pressure fluid to flex and release said sections and including means for controlling the supply and withdrawal of the pressure fluid such that when supplying pressure fluid the membrane section are flexed away from the wall of the bowl in a predetermined sequence which progresses from the wide toward the narrow end of the
  • Centrifugal separator according to claim 1 in which the inner surface of the bowl is provided with adjacent open annular grooves, said membrane sections being in fluid tight connection with the rims of the grooves, the membrane sections following the shape of the grooves when the membrane is not pressurized.
  • Centrifugal separator according to claim 1 in which the ring-shaped sections are divided in two or more groups, each group being connected with a common supply for pressure fluid, such that the groups can be pressurized at will.
  • Centrifugal separator according to claim 1 characterized in that only the membrane section lying at the end remote from the end where the precipitated sludge is ejected is directlyconnected with the supply for pressurized fluid, each section communicating with the adjacent section through a duct with a flow restriction.
  • Centrifugal separator according to claim 1 in which the several membrane sections are combined to one single membrane extending through the whole length of the bowl of the separator.
  • Centrifugal separator according to claim 5 in which the membrane between the ring-shaped sections is connected with the wall of the bowl.
  • said means for periodically deforming said membrane means comprises a pressure fluid-conveying system communicating with the interface between said interior surface and said membrane means, and means for periodically conveying pressure fluid to such interface.
  • said pressure fluid-conveying system includes means for conveying pressure fluid to different longitudinal sections of said drum in time-delayed relation from said one end of the drum to said opposite end thereof.
  • centrifugal separator as defined in claim 10 wherein the interior surface of said drum is formed as a series of frusto-conical sections.
  • said pressure fluid conveying system includes inlet means, discharge means having a restricted opeining, and means for introducing pressure fluid through said inlet means alternately at rates exceeding and less than the rate at which pressure fluid escapes through said restricted opening.
  • the centrifugal separator as defined in claim 9 including anchoring means spaced longitudinally of said drum for anchoring said membrane means to the interior surface of said drum, said interior surface of the drum and those portions of the membrane means between said anchoring means being detailed in design to allow said solids to'be worked toward and discharged from said opposite end of the drum without affecting the normal centrifugal separating .action of the separator. I r
  • said pressure fluid-conveying system includes means for conveying pressure fluid to different longitudinal sections of said drum in time-delayed relation from said one end of the drum to said opposite end thereof.
  • said pressure fluid-conveying system includes means for conveying pressure fluid to different longitudinal sections of said drum in time-delayed relation from said one end of the drum to said opposite end thereof.
  • each of said portions of the membrane means is of annular form and of V-shaped cross section.
  • centrifugal separator as defined in claim 9 wherein said membrane means comprises a plurality of annular sections each of generally V-shaped cross section, and including anchoring means attaching the opposite edges of each such annular section to the interior surface of said drum.
  • centrifugal separator as defined in claim 21 wherein said means for periodically deforming said membrane means comprises a pressure fluid-conveying system communicating with the interfaces between said portions of the membrane means between said anchoring means and said interior surface of the drum.
  • centrifugal separator as defined in claim 21 wherein said interior surface of the drum is formed as a series of frusto-conical sections mating with said V- shaped annular sections of the membrane means.
  • a centrifugal separator as defined in claim 9 "wherein said. means for introducing said fluid-solids mixture continuously maintains a body of fluid in said chamber which terminates short of said opposite end thereof whereby separation of said .solids from said fluid phase and discharge of said fluid phase occur continuously and discharge of said solids occurs during such continuous separation and such continuous discharge of fluid phase.

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  • Centrifugal Separators (AREA)
US00201314A 1970-11-24 1971-11-23 Self-cleaning centrifugal separator Expired - Lifetime US3771715A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK598970 1970-11-24

Publications (1)

Publication Number Publication Date
US3771715A true US3771715A (en) 1973-11-13

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ID=8146640

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US00201314A Expired - Lifetime US3771715A (en) 1970-11-24 1971-11-23 Self-cleaning centrifugal separator

Country Status (7)

Country Link
US (1) US3771715A (xx)
CH (1) CH532423A (xx)
DE (1) DE2157900C3 (xx)
FR (1) FR2116014A5 (xx)
GB (1) GB1371227A (xx)
SE (1) SE372429B (xx)
SU (1) SU460608A3 (xx)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3910489A (en) * 1973-02-13 1975-10-07 Pellerin Zenith As Centrifuge
US3930608A (en) * 1972-09-11 1976-01-06 Escher Wyss Limited Centrifuge
US3997103A (en) * 1974-09-02 1976-12-14 Escher Wyss Limited Path of conveyance with membrane
US4009822A (en) * 1974-09-02 1977-03-01 Escher Wyss Limited Weir in a path of conveyance
US5674173A (en) * 1995-04-18 1997-10-07 Cobe Laboratories, Inc. Apparatus for separating particles
US5906570A (en) * 1995-04-18 1999-05-25 Cobe Laboratories, Inc. Particle filter apparatus
US6022306A (en) * 1995-04-18 2000-02-08 Cobe Laboratories, Inc. Method and apparatus for collecting hyperconcentrated platelets
US6053856A (en) * 1995-04-18 2000-04-25 Cobe Laboratories Tubing set apparatus and method for separation of fluid components
US6334842B1 (en) 1999-03-16 2002-01-01 Gambro, Inc. Centrifugal separation apparatus and method for separating fluid components
US6354986B1 (en) 2000-02-16 2002-03-12 Gambro, Inc. Reverse-flow chamber purging during centrifugal separation
US7279107B2 (en) 2002-04-16 2007-10-09 Gambro, Inc. Blood component processing system, apparatus, and method
US20080272067A1 (en) * 2007-05-01 2008-11-06 Cavaliere William A Methods and Apparatus for Classification of Suspended Materials
US9248446B2 (en) 2013-02-18 2016-02-02 Terumo Bct, Inc. System for blood separation with a separation chamber having an internal gravity valve
CN105562220A (zh) * 2016-03-02 2016-05-11 苏州盛天力离心机制造有限公司 刮刀式离心机的残余滤饼清除装置
CN105562222A (zh) * 2016-03-02 2016-05-11 苏州盛天力离心机制造有限公司 电机上悬式的立式刮刀离心机的残余滤饼清除装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US556567A (en) * 1896-03-17 John b
US2186836A (en) * 1937-07-10 1940-01-09 John P Mcglaughlin Process and apparatus for treating materials in centrifugals
US2661150A (en) * 1947-12-17 1953-12-01 Jr William G Abbott Centrifuge
US3244362A (en) * 1959-06-24 1966-04-05 George N Hein Centrifuging apparatus and fractionating system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US556567A (en) * 1896-03-17 John b
US2186836A (en) * 1937-07-10 1940-01-09 John P Mcglaughlin Process and apparatus for treating materials in centrifugals
US2661150A (en) * 1947-12-17 1953-12-01 Jr William G Abbott Centrifuge
US3244362A (en) * 1959-06-24 1966-04-05 George N Hein Centrifuging apparatus and fractionating system

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3930608A (en) * 1972-09-11 1976-01-06 Escher Wyss Limited Centrifuge
US3910489A (en) * 1973-02-13 1975-10-07 Pellerin Zenith As Centrifuge
US3997103A (en) * 1974-09-02 1976-12-14 Escher Wyss Limited Path of conveyance with membrane
US4009822A (en) * 1974-09-02 1977-03-01 Escher Wyss Limited Weir in a path of conveyance
US5906570A (en) * 1995-04-18 1999-05-25 Cobe Laboratories, Inc. Particle filter apparatus
US5722926A (en) * 1995-04-18 1998-03-03 Cobe Laboratories, Inc. Method for separating particles
US6022306A (en) * 1995-04-18 2000-02-08 Cobe Laboratories, Inc. Method and apparatus for collecting hyperconcentrated platelets
US6053856A (en) * 1995-04-18 2000-04-25 Cobe Laboratories Tubing set apparatus and method for separation of fluid components
US5674173A (en) * 1995-04-18 1997-10-07 Cobe Laboratories, Inc. Apparatus for separating particles
US7549956B2 (en) 1999-03-16 2009-06-23 Caridianbct, Inc. Centrifugal separation apparatus and method for separating fluid components
US6334842B1 (en) 1999-03-16 2002-01-01 Gambro, Inc. Centrifugal separation apparatus and method for separating fluid components
US6514189B1 (en) 1999-03-16 2003-02-04 Gambro, Inc. Centrifugal separation method for separating fluid components
US7029430B2 (en) 1999-03-16 2006-04-18 Gambro, Inc. Centrifugal separation apparatus and method for separating fluid components
US6354986B1 (en) 2000-02-16 2002-03-12 Gambro, Inc. Reverse-flow chamber purging during centrifugal separation
US7497944B2 (en) 2002-04-16 2009-03-03 Caridianbct, Inc. Blood component processing system, apparatus, and method
US7279107B2 (en) 2002-04-16 2007-10-09 Gambro, Inc. Blood component processing system, apparatus, and method
US7708889B2 (en) 2002-04-16 2010-05-04 Caridianbct, Inc. Blood component processing system method
US20080272067A1 (en) * 2007-05-01 2008-11-06 Cavaliere William A Methods and Apparatus for Classification of Suspended Materials
US9248446B2 (en) 2013-02-18 2016-02-02 Terumo Bct, Inc. System for blood separation with a separation chamber having an internal gravity valve
CN105562220A (zh) * 2016-03-02 2016-05-11 苏州盛天力离心机制造有限公司 刮刀式离心机的残余滤饼清除装置
CN105562222A (zh) * 2016-03-02 2016-05-11 苏州盛天力离心机制造有限公司 电机上悬式的立式刮刀离心机的残余滤饼清除装置

Also Published As

Publication number Publication date
GB1371227A (en) 1974-10-23
DE2157900B2 (de) 1979-05-03
SU460608A3 (ru) 1975-02-15
FR2116014A5 (xx) 1972-07-07
DE2157900A1 (de) 1972-05-25
SE372429B (xx) 1974-12-23
DE2157900C3 (de) 1980-01-03
CH532423A (de) 1973-01-15

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