US3749304A - Method of automatic control of the discharge of a concentrated traction of solid particles dispersed in liquids from a centrifuge rotor - Google Patents

Method of automatic control of the discharge of a concentrated traction of solid particles dispersed in liquids from a centrifuge rotor Download PDF

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Publication number
US3749304A
US3749304A US00214662A US3749304DA US3749304A US 3749304 A US3749304 A US 3749304A US 00214662 A US00214662 A US 00214662A US 3749304D A US3749304D A US 3749304DA US 3749304 A US3749304 A US 3749304A
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US
United States
Prior art keywords
rotor
elastically yieldable
concentrate
discharge
yieldable body
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Expired - Lifetime
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US00214662A
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English (en)
Inventor
J Putterlik
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Czech Academy of Sciences CAS
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Czech Academy of Sciences CAS
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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
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7781—With separate connected fluid reactor surface
    • Y10T137/7835—Valve seating in direction of flow
    • Y10T137/7836—Flexible diaphragm or bellows reactor

Definitions

  • the opening and closing of discharge valves is derived from changes of the shape of an elastically yieldable body, situated within the range of radial changes of the lower and .upper level of the concentrate in the rotor, which body is elongated and shortened in the radial direction of the centrifuge rotor due to increasing and decreasing centrifugal pressure of the concentrate, whereby the influence of pressure of the treated dispersion, which is centripetally above the level of the concentrate, on the elastically yieldable body is eliminated by using a material for said body, the volume compressibility of which corresponds to the volume compressibility of liquids.
  • a notable improvement in the control of discharge valves is thereby achieved, as due to the circumstance that this operation is derived solely from pressure differences caused by variations between an upper and lower level of the concentrate in the centrifuge rotor and by elimination of influences of any pressure variations of the dispersion which is centripetally above the concentrate, a discharge of such a volume of the concentrated fraction is secured, which corresponds exactly to the produced amount of concentrate.
  • Another advantage of this control is, that the regulators required for this control are simple and reliable, using an elastically yieldable body.
  • Each of these regulators may comprise an elastically yieldable body, capable to be extended and shortened in the radial direction of centrifuge rotor, the volume compressibility of which body corresponds to the volume compressibility of liquids, which body is anchored with its end distant from the rotor axis in a bracket of the centrifuge rotor and which is provided on its end closer to the rotor axis with a strap piece, on which a valve rod is suspended, passing through the axis of the elastically yieldable body.
  • a substantially simple embodiment of the object of this invention is thus created which is efficient, cheap in manufacture, easy to maintain and particularly reliable in operation as the major parts of the regulator consist of the elastically yieldable body with a valve rod passing through said body.
  • FIG. 1 shows a are rotor in a section perpendicularly to its rotation axis
  • FIGS. 2 and 3 ar longitudinal sectional views of regulators showing a closed and an open valve.
  • FIG. 1 we see a simplified view of part of a centrifuge rotor 1 in a section perpendicularly to the rotation axis of this rotor, passing through the discharge valves 2.
  • the centrifuge space 3 with a not shown centrifuge separator, for instance with a disk separator occupies the central part of the rotor 1, having a supply and a discharge of the centripetally separated fraction.
  • a concentration space 4 occupies the circumferential part of the rotor 1, whichspace is subdivided into a number of sector compartments A, B, C, D where the concentrated fraction is settling, the upper level of which concentrated fraction is indicated by a cylindrical surface of the radius R and its lower.
  • Each sector compartment A, B of the concentrating space 4 terminates in the radial direction from the rotor axis in a discharge valve 2, the passage through which is controlled by a regulator 5.
  • Each regulator 5 consists of an elastically yieldable body 6, a stiff strap piece 7, a valve rod 8 and a bracket 9.
  • the elastically yieldable body 6 is with its end distant from the axis of the centrifuge rotor I inserted and anchored in a bracket 9, fixed in the rotor 1.
  • This elastically yieldable body 6 must be made of a material which is sufficiently elastic so as to return to its original shape after forces which caused its deformation have ceased and its volume should depend on pressure in a negligible way only, similarly as liquids, for which this is a characteristic property.
  • the specific weight of the material from which the elastically yieldable body 6 is made is rather close to the specific weight of the treated dispersion in the centrifuge space 3. Both these requirements are met for instance by full rubber, the volume compressibility of which is practically negligible, which is perfectly elastic and its specific weight can be adjusted by fillers to the required value. Rubber made from natural rubber without fillers has for instance a specific weight about 960 kg m, whereby the treated dispersions have generally a higher specific weight and the higher specific weight can be easily adjusted by fillers.
  • the concentrated fraction of the treated dispersion is separated in the centrifuge space 3 and settles due to centrifugal forces in the cause of proceeding concentration in the individual sector compartments A, B of the concentrating space 4, which sector compartments are filled with concentrate within the range of its upper level and lower level, determined by cylindrical surfaces of radii R and R So far the concentrate does not surpass the lower level, determined by a cylindrical surface of the radius R,, as indicated for sector B, the surface of the regulator is exposed to the pressure of the treated dispersion, surrounding the regulator 5 and occupying the centrifuge space 3 centripetally above the concentrate.
  • the volume compressibility of the elastically yieldable body 6 is the same as of liquids, this elastically yieldable body 6 forms an adequate part of the hydraulic content, represented by the treated dispersion.
  • the centrifugal pressure of the treated dispersion therefore causes no deformation of this elastically yieldable body 6 even if it varies due to not uniform conditions of operation. Therefore so far the level of the concentrate does not surpass the lower value determined by a cylindrical surface of a radius R, shown in sector B in FIG. 1 and in FIG. 2, the discharge valve 2 remains closed by the valve rod 8 of the regulator 5.
  • the settled concentrated fraction with a higher specific weight surrounds the elastically yieldable body 6 with a lower specific weight, compresses it perpendicularly to the axis of the regulator 5 and elongates it by hydrostatic pressure, lifting thereby simultaneously the stiff strap piece 7 with the suspended valve rod 8 and opening thus the discharge valve 2.
  • the opening of the discharge valve 2 introduces a centrifugal discharge of the settled concentrated fraction from this sector C from the rotor I up to a moment where the concentrate drops to the lower level deter mined by cylindrical surface of the radius R,, where again conditions indicated in sector B are prevailing, where the regulator 5 is surrounded by the still not concentrated dispersion, the centrifugal pressure of which does not cause any deformation of the elastically yieldable body 6, so that this body 6 takes its original shape, lowering the stiff strap piece 7 with the suspended valve rod 8, which closes again the discharge valve 2.
  • the centrifugal discharge ceases and the settled concentrated fraction starts again to rise.
  • the described cycle is constantly repeated.
  • the object of this invention can be used for separating and concentrating fine grain dispersions of solid materials in liquids such as are all suspensions and of heavier components in a combination of liquids.
  • a possibility of extensive application is given by the extraordinary simplicity as shown by the described solution of regulators 5 with elastically yieldable bodies 6.
  • a method of automatic control of the discharge of a concentrated fraction of a dispersion of solid particles in a liquid and of a heavier component in a combination of liquids from a centrifuge rotor by discharge valves, in dependence on an increasing and decreasing level of the concentrate comprising the steps of utilizing for this control changes of longitudinal dimensions of a solid elastically yieldable body which changes being caused by the variations in pressure of an increasing and decreasing level of the concentrate at the circumference of a centrifuge rotor, simultaneously eliminating the influence of the treated nonconcentrated dispersion occupying the rotor space centripetally from the concentrate on the elastically yieldable body by employing an elastically yieldable body having a volume compressibility corresponding to the volume compressibility of the liquids.
  • a centrifuge comprising a rotor for separating a liquid dispersion of solid particles into a concentrated fraction and a heavier component, an arrangement for the automatic control of the discharge of the concentrated fraction comprising a plurality of discharge openings situated at the circumference of the rotor,

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  • Centrifugal Separators (AREA)
US00214662A 1971-01-18 1972-01-03 Method of automatic control of the discharge of a concentrated traction of solid particles dispersed in liquids from a centrifuge rotor Expired - Lifetime US3749304A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS33071*#A CS153120B1 (de) 1971-01-18 1971-01-18

Publications (1)

Publication Number Publication Date
US3749304A true US3749304A (en) 1973-07-31

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ID=5335220

Family Applications (1)

Application Number Title Priority Date Filing Date
US00214662A Expired - Lifetime US3749304A (en) 1971-01-18 1972-01-03 Method of automatic control of the discharge of a concentrated traction of solid particles dispersed in liquids from a centrifuge rotor

Country Status (18)

Country Link
US (1) US3749304A (de)
JP (1) JPS546743B1 (de)
AT (1) AT313178B (de)
BE (1) BE778182A (de)
BR (1) BR7200291D0 (de)
CA (1) CA946802A (de)
CS (1) CS153120B1 (de)
DD (1) DD95790A5 (de)
DE (1) DE2200559C3 (de)
ES (1) ES398841A1 (de)
FR (1) FR2122447B1 (de)
GB (1) GB1339411A (de)
HU (1) HU171240B (de)
IT (1) IT946648B (de)
NL (1) NL7200340A (de)
PL (1) PL77355B1 (de)
SE (1) SE390258B (de)
SU (1) SU550176A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4078718A (en) * 1976-02-12 1978-03-14 Ceskoslovenska Akademie Ved Apparatus and method for automatically discharging a thickened fraction from a centrifuge rotor
US4120448A (en) * 1977-06-08 1978-10-17 Baxter Travenol Laboratories, Inc. Centrifugal liquid processing apparatus with automatically positioned collection port
US4403061A (en) * 1982-06-29 1983-09-06 Standard Oil Company (Indiana) Injection moldable amide-imide polymers and copolymers containing metal oxides capable of forming hydrates stable at temperatures in excess of 500° F.
US4402680A (en) * 1981-07-09 1983-09-06 Haemonetics Corporation Apparatus and method for separating fluid into components thereof
US20080005478A1 (en) * 2006-06-30 2008-01-03 Seagate Technology Llc Dynamic adaptive flushing of cached data
US20110263405A1 (en) * 2010-04-22 2011-10-27 Specialist Process Technologies Limited Separator

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2173579A (en) * 1935-05-23 1939-09-19 Fawcett Harold William Centrifugal cream separator
US2365752A (en) * 1942-04-11 1944-12-26 Timken Roller Bearing Co Fuel injector
US2623535A (en) * 1944-12-06 1952-12-30 Burton D Morgan Valve control mechanism
US3114655A (en) * 1961-11-16 1963-12-17 Buckau Wolf Maschf R Centrifugal separator
US3341093A (en) * 1964-04-14 1967-09-12 Ceskoslovenska Akademie Ved Centrifuge with automatic control of the discharge of concentrated solids

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1431454A (fr) * 1964-04-14 1966-03-11 Ceskoslovenska Akademie Ved Dispositif notamment pour la vidange automatique d'un fractionnement concentré d'une essoreuse centrifuge ainsi que les essoreuses pourvues de ce dispositif

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2173579A (en) * 1935-05-23 1939-09-19 Fawcett Harold William Centrifugal cream separator
US2365752A (en) * 1942-04-11 1944-12-26 Timken Roller Bearing Co Fuel injector
US2623535A (en) * 1944-12-06 1952-12-30 Burton D Morgan Valve control mechanism
US3114655A (en) * 1961-11-16 1963-12-17 Buckau Wolf Maschf R Centrifugal separator
US3341093A (en) * 1964-04-14 1967-09-12 Ceskoslovenska Akademie Ved Centrifuge with automatic control of the discharge of concentrated solids

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4078718A (en) * 1976-02-12 1978-03-14 Ceskoslovenska Akademie Ved Apparatus and method for automatically discharging a thickened fraction from a centrifuge rotor
US4120448A (en) * 1977-06-08 1978-10-17 Baxter Travenol Laboratories, Inc. Centrifugal liquid processing apparatus with automatically positioned collection port
US4402680A (en) * 1981-07-09 1983-09-06 Haemonetics Corporation Apparatus and method for separating fluid into components thereof
US4403061A (en) * 1982-06-29 1983-09-06 Standard Oil Company (Indiana) Injection moldable amide-imide polymers and copolymers containing metal oxides capable of forming hydrates stable at temperatures in excess of 500° F.
US20080005478A1 (en) * 2006-06-30 2008-01-03 Seagate Technology Llc Dynamic adaptive flushing of cached data
US20110263405A1 (en) * 2010-04-22 2011-10-27 Specialist Process Technologies Limited Separator

Also Published As

Publication number Publication date
DD95790A5 (de) 1973-02-12
PL77355B1 (de) 1975-04-30
IT946648B (it) 1973-05-21
DE2200559B2 (de) 1974-03-07
DE2200559A1 (de) 1972-07-27
ES398841A1 (es) 1974-09-16
BE778182A (fr) 1972-05-16
BR7200291D0 (pt) 1973-06-12
HU171240B (hu) 1977-12-28
FR2122447B1 (de) 1978-03-03
FR2122447A1 (de) 1972-09-01
NL7200340A (de) 1972-07-20
CA946802A (en) 1974-05-07
SU550176A1 (ru) 1977-03-15
JPS546743B1 (de) 1979-03-31
AT313178B (de) 1974-02-11
SE390258B (sv) 1976-12-13
GB1339411A (en) 1973-12-05
DE2200559C3 (de) 1974-10-17
CS153120B1 (de) 1974-02-25

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