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US2835387A - Centrifugal method and means for continuously fractionating solid particles in liquid suspension thereof - Google Patents

Centrifugal method and means for continuously fractionating solid particles in liquid suspension thereof Download PDF

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Publication number
US2835387A
US2835387A US80885A US8088549A US2835387A US 2835387 A US2835387 A US 2835387A US 80885 A US80885 A US 80885A US 8088549 A US8088549 A US 8088549A US 2835387 A US2835387 A US 2835387A
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Prior art keywords
liquid
suspension
cyclone
particles
apex
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Expired - Lifetime
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US80885A
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English (en)
Inventor
Freerk J Fontein
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Stamicarbon BV
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Individual
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/245—Discharge mechanisms for the sediments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/2488—Feed or discharge mechanisms for settling tanks bringing about a partial recirculation of the liquid, e.g. for introducing chemical aids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/26—Separation of sediment aided by centrifugal force or centripetal force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/26—Separation of sediment aided by centrifugal force or centripetal force
    • B01D21/267—Separation of sediment aided by centrifugal force or centripetal force by using a cyclone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/30—Control equipment
    • B01D21/34—Controlling the feed distribution; Controlling the liquid level ; Control of process parameters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/12—Construction of the overflow ducting, e.g. diffusing or spiral exits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/14—Construction of the underflow ducting; Apex constructions; Discharge arrangements ; discharge through sidewall provided with a few slits or perforations
    • B04C5/185—Dust collectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
    • B04C2009/002—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks with external filters

Definitions

  • the invention relates to a centrifugal method and means for continuously fractionating solid particles in liquid suspension thereof.
  • the invention relates to the centrifugal method, which is usually referred to as cyclonic separation, the method being performed in a cyclone separator.
  • separators comprise a substantially conical separating chamber provided with a tangential infeed near the widest end thereof, a closure member with a central discharge aperture at the widest end and a second discharge aperture at the apex end of the conical separating chamber.
  • a mass of particles in liquid suspension is introduced under fluid pressure into the separating chamber through the-tangential infeed and as a result thereof the liquid body in the tank is compelled to rapidly rotate around the axis of the tank, so that centrifugal forces are substantially in excess of gravity, the greater part of the liquid continuously discharging through the central aperture in the closure member at the widest end side of the separating chamber whereas the minor part of said liquid discharges also continuously through the second discharge aperture at the apex end of the chamber.
  • the rotational movement in the tank is of the returnflow type, consisting of two concentric vortices of the same rotational direction but of opposite axial direction, the outer one rotating towards the apex of the tank, the inner one rotating towards its base end.
  • the major part of the liquid rotating in the outer vortex flows towards the axis of the tank into the inner vortex, the other part discharging through the apex aperture.
  • the apparatus used in obtaining this type of fluid flow may be entirely of conical shape, but for reasons of constructional simplicity it mostly comprises a relatively short cylindrical portion, tapering into a relatively long conical portion.
  • the denser and greater particles of a suspension of solids in a liquid medium introduced tangentially are thrown towards the circumference of the tank by the centrifugal force caused by the rotational movement, whereas the smaller ones are dragged along with the liquid into the center of the rotating liquid body and discharged therefrom through the base aperture.
  • the broad end side of the apparatus, near the tangential inlet may be called base, not only because it can be considered as the baseof a cone, but moreover as the rotational movement has its base at this side, the infeed of the liquid starting it along this side.
  • the other side may be related to as the top side.
  • Various separation processes may be performed in the apparatus described hereabove. It can be used not only for dividing a mixture of particles suspended in a liquid medium into two fractions, one of which containing the coarser and/ or the denser particles and the other containing the finer and/ or lighter particles, but also to separate solids from liquid suspension in order to recover said solids or to clean the liquid medium or to obtain said suspension in a more concentrated condition.
  • the discharge from the central aperture in the closure member at the widest end of the'separating chamber usually has been received in a receiving tank or overflow hood adjacent the said chamber.
  • the means for obtaining such thin circular stream may be a plate close to the closure member of the separator.
  • closure member and the plate which hereinafter will be referred to as difiusor-rnember, may be of several appropriate designs, corresponding to the common design of cyclonic separators, I prefer a special shape of the said closure member and diifusor member as a greater sharpness of separation will be obtained in this way.
  • This preferred closure member tapers into the separator space and at least its central part has a gradually inwardly curved shape so as to present, to the discharge, walls gradually flaring outwards.
  • the ditlusor-plates form will be adapted to the shape of the closure member in order to obtain a' passage of equal width throughout its annular length.
  • I further provide for reception of the discharge from the apex end aperture of the separating chamber in a' liquid body, which is in open communication with that separating chamber.
  • the receiving vessel being open at the top and the separating chamber being immersed at its apex end in the liquid body in said vessel, the latter and the separating chamber together constitute a set of c'om- Although the,
  • the vessel liquid will be forced to enter the said chamber through the apex aperture thereof. So two opposite streams of liquid will pass through the apex aperture, one of which along the circumference thereof and carrying the separated fraction from the inside of the separating chamber into the receiving vessel and the. other of which returning at least part of the liquid from: the said fraction into the separating chamber, which part of the said liquid also may contain the finer and lighter particles of said fraction. In this way an additional separation is obtained, increasing the sharpness of separation of the separating chamber. Moreover the concentration of the suspension product may be increased.
  • the discharge from the receiving vessel must be of suflrlcient capacity to pass the surplus liquid entering the said vessel.
  • the pressure in the core of the separating chamber may be adjusted in such a way that the two streams of liquid compensate each other whereby the amount of liquid in the receiving vessel may be held invariable. This enables the separated solids to accumulate in the vessel,
  • Another embodiment of the invention calls for the adjustment of the said core pressure at such a low value that the stream of liquid from the receiving vessel into the separating chamber will be in excess of the opposite stream and for supplying liquid from other source to said vessel to maintain the amount of liquid therein.
  • the adjustment of the cores pressure can be performed in a simple way by adjusting of the distance between the closure member and the diff-uso plate.
  • This plate therefore is provided with means for adjusting said distance, the said means being a screw spindle or the like.
  • Figure 1 showing diagrammatically a typicalinstalla- Fine and light tion for separating particles of different specific gravity including a cyclone in combination with an upward current classifier.
  • Figure 2 is a diagrammatic flow sheet of a similar installation showing a cyclone in combination with a rake-classifier and ' Figure 3 is a cyclone drawn on a somewhat larger scale.
  • like parts are indicated with like reference numerals.
  • reference numeral 1 designates a hopper containing the particles to be separated, for example, raw coal. These particles are delivered by a belt conveyor 2 to a tank 3.
  • Reference numeral 4 designates a hopper containing relatively fine particles of a specific gravity higher than the specific gravity of separation of the mixture to be separated. For example, these particles may be shale particles of a size below 0.2 mm. and are delivered to tank 3 by a screw conveyor 5.
  • a pipe 6 provided with a control valve 7 supplies water to tank 3 so that a suspension is formed in which the different sized particles are kept in a substantially uniform distribution or dispersion by means of an agitator 8.
  • This suspension is introduced by means of a pump 9 and a pipe 10 into a cyclone which is generally designated at 11.
  • the cyclone (see Figure 3) includes at its base end a shallow cylindrical portion 12 provided with an annular and conical base plate 13.
  • the pipe 10 communicates tangentially with portion 12 through an opening 14.
  • a lower conical portion 15 is connected at its upper end with the cylindrical portion by means of bolts 16, the two portions being coaxial.
  • the apex portion 15 has an axial opening 17.
  • a vortex finder 19 Screwed in the central opening 18 of the base plate is a vortex finder 19 having a vortex passage 20 in axial alignment with the apex opening 17 and flaring outwardly in the direction of flow.
  • a cyclindrical discharge hood 21 is connected by means of bolts 22 on the top of the cylindrical portion 12 and is closed by a cover plate 23 which is fixed to it by means of bolts 24.
  • a cover plate 23 which is fixed to it by means of bolts 24.
  • Welded on the cover plate is a nipple 25, provided with a threaded central opening 26, in which a spindle 27 can be screwed up and down by rotating the hand-wheel 28, the hand-Wheel being fixed on the spindle by means of a nut 29.
  • the spindle protrudes through the opening 26 into the discharge hood of the cyclone.
  • a diffuser plate 30 of which the surface facing the flaring vortex opening diverges in the same way as this opening.
  • the discharge hood is further provided with an opening 31 in the cylindrical wall from which a pipe 32 extends tangentially and is arranged to discharge onto a draining screen 33.
  • the through-fall of this screen collects in a receiver 34 and is directed through pipe 35 to a froth flotation machine 36.
  • This machine may be of the Kleinbentinck type and serves for removing the very fine coal particles from the suspension.
  • the remaining suspension flows through a pipe 37 to a pump 33 from which it returns through a pipe 39 to the tank 3, to be reused as separating suspension. Obviously, fresh suspension material from hopper 4 and water from pipe 6 will only be introduced into the tank 3 to replace suspension lost in the separation circuit.
  • the suspension particles which are not removed from the separated fraction on the draining screen 33 are removed on a second screen 40 by spraying water through the spray-heads 41 on the separated fraction.
  • the recovered diluted suspension is collected in a receiver 42 from Where it flows through a pipe 43 to a thickener 44.
  • This thickener may be of the Dorr-bowl type.
  • the thickened slurry flows through a pipe 45 to the pump 38 and is returned through pipe 39 to tank 3.
  • the clarified liquid flows over at 46 andthrough a pipe 47 to a tank 48.
  • This tank is provided with an adjustable weir 49.
  • the overflowing liquid flows through pipe 50 to a pump 51 from where it is delivered through pipe 52 to the spray heads 41. If necessary the excess of liquid may be withdrawn from the system through a pipe 53 and a valve 54.
  • the cyclone discharges through the apex opening 17 into an open receiver 55.
  • the receiver is at the bottom provided with a conduit 56 to which 'at the lower end liquid may be supplied from the tank 48 via a pipe 57, and a jacket 58 through the opening 59.
  • a screw conveyor 60 is arranged at the bottom of the conduit 56 and is adapted to discharge the separated particles at 61 at a level above the level of the liquid in the receivers 48 and 55.
  • the conveyor is driven by an electric motor 62 via a gear transmission 63.
  • the suspension from the tank 3 is delivered under such a pressure by the pump 9 into the cyclone that vortices will be developed in the cyclone wherein the centrifugal force is much greater than the gravitational force acting on the particles.
  • the specifically heavy particles move into an outer stratum against the wall of the cyclone and towards and through the apex opening 17, whereas the specifically lighter particles gather in an inner stratum which ascends and discharge through the vortex passage 20 into the compartment formed by hood 21.'
  • a great deal of the relatively fine heavy particles leave the cyclone at the apex. Due to the centrifugal force a column of air is present in the core of the cyclone of which the pressure is lower than the atmospheric pressure and which pressure may be regulated by adjusting the distance between the diffusor 30 and the base plate 13 of the cyclone.
  • the cyclone being provided at its apex with an open receiver 55 filled with liquid, the under pressure in the core of the cyclone can be increased by suitable adjusting the diffuser to such an extent that the liquid in the receiver rises inside the core.
  • the bottom outlet of the receiver is constructed as a hydraulic classifier by supplying liquid from tank 48 in an upward direction through the conduit 56'. In this way the relatively fine particles that might be entrained by the descending fraction will be sent back to the receiver and from there to the cyclone so that the loss of suspension material in the fraction discharged by the conveyor 60 is nil.
  • the upward current classifier will cause an additional separation of the discharge from the cyclonic separator.
  • the subsequent classifier can be omitted, the receiving vessel 55 being provided with a discharge valve at or near the bottom thereof.
  • the cyclone discharges with its apex in a rake-classifier 64.
  • the clarified liquid from the thickener 44 is sent to a receiver 65.
  • a part of the liquid is pumped from this receiver by pump 51 through pipe 52 to the spray heads 41 and another part is pumped by a pump 66 through a pipe 67 into hutch-boxes 68 where the liquid enters the inclined trough through perforations in the bottom.
  • a reciprocating rake mechanism schematically indicated at 69 carriesthe heavy solids discharged through the apex of the cyclone step by step to the outlet 70 against the current of water 1 flowing through the hutch-boxes in the direction of the cyclone. In this way the relatively fine heavy particles are washed from the separated products and returned to the cyclone.
  • Reference numerals 71 and '72 indicate a bottom outlet for the receiver 65 and a discharge valve for withdrawing the excess of liquid from the circuit.
  • Operational instructions of this set up for a coal washery plant of 10 tons raw coal per hour calls for a cyclone having a maximum diameter of 350 mm., an apex angle of 20 degrees, inlet-, base and apex apertures of 50, 70 and 45 mm., respectively, and a feeding pressure of 1 ate.
  • the feed consists of raw fine coal with a size up to 4 mm. in 3.5 to 4 times the amount of suspension of a specific gravity of 1.2 with which suspension a separation at a specificgravity of 1.5 can be obtained.
  • the capacity of this cyclone is about 35 to 40 tons of water per hour.
  • the rake classifier is of a commercially known type 200" long and 28" wide. Two tons of water per hour are introduced through the hutch boxes and this water and the discharging liquid from the apex of the cyclone are sucked up by this cyclone.
  • a substantially conical separating chamber having a tangential inlet near the widest end thereof, a closure member with a central aperture at said end, a second aperture at the apex end of said chamber, which end is positioned in a liquid receiving vessel at a point substantially below the level of the liquid therein, the liquid in said vessel being in open communication with atmospheric air, means for outwardly directing the discharge from the said central aperture in a thin circu- 7 hr stream and means for varying the distance in axial relation between said means and said closure member.
  • the said means for outwardly directing thedischarge from the said central aperture comprise a difiusor-member facing the closure member of the separating chamber from the outside, the surface of which diffusor-member facing the said closure member being substantially in conformity with the outer surface of the said closure member whereby an outwardly diverging circular passage for the said discharge is created.
  • the said means for outwardly directing the discharge from the said central aperture comprise a diffusor-member facing the closure member of the separating chamber from the outside and enclosed in a discharge hood adjacent the separating chamber and being an integrating part thereof and supporting the means for varying the distance in axial relation between the said members.
  • Apparatus according to claim 6 in which at least the central part of the said closure member is curved inwardly and protruding into the separating chamber whereby to present, to the discharge, walls gradually 13. Apparatus according to claim 6, with the addition of an outlet at the bottom of the said receiving vessel.
  • Apparatus according to claim 6 with the addition of an upward current classifier directing its upward current into the receiving vessel in counter-current with the solids therefrom.

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  • Chemical Kinetics & Catalysis (AREA)
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US80885A 1948-03-25 1949-03-11 Centrifugal method and means for continuously fractionating solid particles in liquid suspension thereof Expired - Lifetime US2835387A (en)

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NL669194X 1948-03-25

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US (1) US2835387A (fi)
BE (1) BE488071A (fi)
DE (1) DE846987C (fi)
FR (1) FR983650A (fi)
GB (1) GB669194A (fi)
NL (1) NL67429C (fi)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2975896A (en) * 1955-05-02 1961-03-21 Hirsch Siegfried Hydrocyclone for fibres suspension
US2996182A (en) * 1957-04-18 1961-08-15 Stamicarbon Process and apparatus for wet screening
US3016962A (en) * 1959-10-09 1962-01-16 Pan American Petroleum Corp Automatic acting hydrocyclones for drilling fluids
US3105044A (en) * 1960-03-14 1963-09-24 Bird Machine Co Separator
US3166496A (en) * 1960-08-01 1965-01-19 Commw Scient Ind Res Org Method and apparatus for the separation of solid particles into sized fractions
US3415375A (en) * 1964-03-05 1968-12-10 Wikdahl Nils Anders Lennart Method and apparatus for vortical separation of solids
US3568847A (en) * 1968-12-09 1971-03-09 Wayne F Carr Hydrocyclone
FR2514668A1 (fr) * 1981-10-16 1983-04-22 Nat Res Dev Dispositif de reglage de la surface de sortie d'un separateur a cyclone
US5817230A (en) * 1997-08-29 1998-10-06 University Of Kentucky Research Foundation Method for improving the pozzolanic character of fly ash
US6533848B1 (en) 2000-03-13 2003-03-18 University Of Kentucky Research Foundation Technology and methodology for the production of high quality polymer filler and super-pozzolan from fly ash
US20100056356A1 (en) * 2008-08-29 2010-03-04 Robl Thomas L Methodology and technology for the production of improved coal derived fly ash for the production of metal matrix composites
JP2013031826A (ja) * 2011-06-28 2013-02-14 Industria:Kk 微細物除去装置及び微細物除去システム
WO2013040678A1 (en) 2011-09-19 2013-03-28 Daniel Guy Pomerleau Three-phase separation system for drilling fluids and drill cuttings
CN103008122A (zh) * 2012-12-28 2013-04-03 刘晔 旋流器
US10081994B2 (en) 2015-01-30 2018-09-25 Fp Marangoni Inc. Screened enclosure with vacuum ports for use in a vacuum-based drilling fluid recovery system
US20190015766A1 (en) * 2017-07-14 2019-01-17 Vermeer Manufacturing Company Cyclonic Separation Systems And Hydro Excavation Vacuum Apparatus Incorporating Same
US20220055038A1 (en) * 2018-12-21 2022-02-24 Thomas A. Valerio System and method for four dimensionally separating materials
US11420140B2 (en) * 2020-02-21 2022-08-23 Zhejiang Shuren College (Zhejiang Shuren University) Integrated separation unit for microplastics in the coastal sediments and collection method of microplastics
WO2022232197A1 (en) * 2021-04-26 2022-11-03 Black Sand Technology, Llc Systems and methods for mixture separation
WO2023132100A1 (ja) * 2022-01-06 2023-07-13 株式会社ブンリ 分離装置の消泡構造
WO2023212617A1 (en) * 2022-04-26 2023-11-02 Black Sand Technology, Llc Systems and methods for mixture separation

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2849117A (en) * 1958-08-26 Rietema
DE929119C (de) * 1951-09-05 1955-07-11 Stamicarbon Verfahren zur Gewinnung von Staerke
DE929120C (de) * 1951-09-05 1955-06-20 Stamicarbon Verfahren zur Gewinnung reiner Staerke
DE1153611B (de) * 1955-05-02 1963-08-29 Waldhof Zellstoff Fab Hydrozyklon fuer Fasersuspensionen
DE1085413B (de) * 1956-09-25 1960-07-14 Rauma Repola Oy Vorrichtung zum Behandeln, insbesondere Waschen und Eindicken, von Faserstoffaufschwemmungen
US3024909A (en) * 1959-04-27 1962-03-13 Process Engineers Inc Vortical type grit separator
US3071249A (en) * 1959-11-13 1963-01-01 Phillips Petroleum Co Mine water desanding apparatus
US3341983A (en) * 1964-10-06 1967-09-19 Baldenhofer Method and apparatus for continuously clarifying machine tool coolant and the like
DE2160747C2 (de) * 1971-12-08 1983-06-01 Metallgesellschaft Ag, 6000 Frankfurt Zyklonabscheider
NO157285C (no) * 1983-01-12 1988-02-24 Andresen J H Titech Hydrosyklon.
DE4334527A1 (de) * 1993-10-09 1995-04-13 Voith Gmbh J M Wirbelströmungsabscheider

Citations (10)

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US1149463A (en) * 1913-05-02 1915-08-10 Frank Pardee Apparatus for separating coal, ore, &c.
US1197946A (en) * 1913-05-02 1916-09-12 Frank Pardee Apparatus for separating coal, ore, &c.
US2312706A (en) * 1938-11-19 1943-03-02 Nichols Eng & Res Corp Method and apparatus for separating heavy particles from paper pulp suspensions
GB563408A (en) * 1943-02-08 1944-08-14 Powell Duffryn Associated Coll Improvements in or relating to cyclone separators
US2377721A (en) * 1941-07-15 1945-06-05 Vickerys Ltd Separator of the vortex type for paper pulp
US2377524A (en) * 1939-11-21 1945-06-05 Hammermill Paper Co Method of and means for separating solid particles in pulp suspensions and the like
CH238137A (de) * 1942-08-17 1945-06-30 W Eicher Zyklon.
US2422203A (en) * 1942-10-12 1947-06-17 Harry L Mcneill Specific gravity separation of solids in liquid suspension
US2533655A (en) * 1947-04-04 1950-12-12 Wilmot Eng Co Apparatus for separating materials of different specific gravities
US2550340A (en) * 1945-08-07 1951-04-24 Directie Staatsmijnen Nl Process for the separation of solid substances of different specific gravity and grain size

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1149463A (en) * 1913-05-02 1915-08-10 Frank Pardee Apparatus for separating coal, ore, &c.
US1197946A (en) * 1913-05-02 1916-09-12 Frank Pardee Apparatus for separating coal, ore, &c.
US2312706A (en) * 1938-11-19 1943-03-02 Nichols Eng & Res Corp Method and apparatus for separating heavy particles from paper pulp suspensions
US2377524A (en) * 1939-11-21 1945-06-05 Hammermill Paper Co Method of and means for separating solid particles in pulp suspensions and the like
US2377721A (en) * 1941-07-15 1945-06-05 Vickerys Ltd Separator of the vortex type for paper pulp
CH238137A (de) * 1942-08-17 1945-06-30 W Eicher Zyklon.
US2422203A (en) * 1942-10-12 1947-06-17 Harry L Mcneill Specific gravity separation of solids in liquid suspension
GB563408A (en) * 1943-02-08 1944-08-14 Powell Duffryn Associated Coll Improvements in or relating to cyclone separators
US2550340A (en) * 1945-08-07 1951-04-24 Directie Staatsmijnen Nl Process for the separation of solid substances of different specific gravity and grain size
US2533655A (en) * 1947-04-04 1950-12-12 Wilmot Eng Co Apparatus for separating materials of different specific gravities

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2975896A (en) * 1955-05-02 1961-03-21 Hirsch Siegfried Hydrocyclone for fibres suspension
US2996182A (en) * 1957-04-18 1961-08-15 Stamicarbon Process and apparatus for wet screening
US3016962A (en) * 1959-10-09 1962-01-16 Pan American Petroleum Corp Automatic acting hydrocyclones for drilling fluids
US3105044A (en) * 1960-03-14 1963-09-24 Bird Machine Co Separator
US3166496A (en) * 1960-08-01 1965-01-19 Commw Scient Ind Res Org Method and apparatus for the separation of solid particles into sized fractions
US3415375A (en) * 1964-03-05 1968-12-10 Wikdahl Nils Anders Lennart Method and apparatus for vortical separation of solids
US3568847A (en) * 1968-12-09 1971-03-09 Wayne F Carr Hydrocyclone
US4629555A (en) * 1981-10-16 1986-12-16 Colman Derek A Cyclone separator
FR2514668A1 (fr) * 1981-10-16 1983-04-22 Nat Res Dev Dispositif de reglage de la surface de sortie d'un separateur a cyclone
US5817230A (en) * 1997-08-29 1998-10-06 University Of Kentucky Research Foundation Method for improving the pozzolanic character of fly ash
US6533848B1 (en) 2000-03-13 2003-03-18 University Of Kentucky Research Foundation Technology and methodology for the production of high quality polymer filler and super-pozzolan from fly ash
US20100056356A1 (en) * 2008-08-29 2010-03-04 Robl Thomas L Methodology and technology for the production of improved coal derived fly ash for the production of metal matrix composites
JP2013031826A (ja) * 2011-06-28 2013-02-14 Industria:Kk 微細物除去装置及び微細物除去システム
US9375732B2 (en) 2011-09-19 2016-06-28 Fp Marangoni Inc. Three-phase separation system for drilling fluids and drill cuttings
WO2013040678A1 (en) 2011-09-19 2013-03-28 Daniel Guy Pomerleau Three-phase separation system for drilling fluids and drill cuttings
EP2758145A4 (en) * 2011-09-19 2015-06-17 Fp Marangoni Inc THREE-PHASE SEPARATION SYSTEM FOR DRILLING FLUIDS AND DRILLING DRAIN
CN103008122A (zh) * 2012-12-28 2013-04-03 刘晔 旋流器
CN103008122B (zh) * 2012-12-28 2016-02-03 刘晔 旋流器
US10081994B2 (en) 2015-01-30 2018-09-25 Fp Marangoni Inc. Screened enclosure with vacuum ports for use in a vacuum-based drilling fluid recovery system
US20190015766A1 (en) * 2017-07-14 2019-01-17 Vermeer Manufacturing Company Cyclonic Separation Systems And Hydro Excavation Vacuum Apparatus Incorporating Same
US10655300B2 (en) * 2017-07-14 2020-05-19 Vermeer Manufacturing Company Cyclonic separation systems and hydro excavation vacuum apparatus incorporating same
US20220055038A1 (en) * 2018-12-21 2022-02-24 Thomas A. Valerio System and method for four dimensionally separating materials
US11420140B2 (en) * 2020-02-21 2022-08-23 Zhejiang Shuren College (Zhejiang Shuren University) Integrated separation unit for microplastics in the coastal sediments and collection method of microplastics
WO2022232197A1 (en) * 2021-04-26 2022-11-03 Black Sand Technology, Llc Systems and methods for mixture separation
IL308040B1 (en) * 2021-04-26 2025-01-01 Black Sand Tech Llc Systems and methods for separating mixtures
WO2023132100A1 (ja) * 2022-01-06 2023-07-13 株式会社ブンリ 分離装置の消泡構造
JP2023100348A (ja) * 2022-01-06 2023-07-19 株式会社ブンリ 分離装置
WO2023212617A1 (en) * 2022-04-26 2023-11-02 Black Sand Technology, Llc Systems and methods for mixture separation

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GB669194A (en) 1952-03-26
FR983650A (fr) 1951-06-26
NL67429C (fi)
BE488071A (fi)
DE846987C (de) 1952-08-18

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