EP0027630B1 - Zentrifuge zum Trennen von Feststoff-Flüssigkeitsgemischen - Google Patents

Zentrifuge zum Trennen von Feststoff-Flüssigkeitsgemischen Download PDF

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Publication number
EP0027630B1
EP0027630B1 EP80106240A EP80106240A EP0027630B1 EP 0027630 B1 EP0027630 B1 EP 0027630B1 EP 80106240 A EP80106240 A EP 80106240A EP 80106240 A EP80106240 A EP 80106240A EP 0027630 B1 EP0027630 B1 EP 0027630B1
Authority
EP
European Patent Office
Prior art keywords
opening
control arrangement
openings
centrifuge
drum
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP80106240A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0027630A1 (de
Inventor
Georg Hiller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19792942451 external-priority patent/DE2942451A1/de
Priority claimed from DE19803036550 external-priority patent/DE3036550A1/de
Application filed by Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Publication of EP0027630A1 publication Critical patent/EP0027630A1/de
Application granted granted Critical
Publication of EP0027630B1 publication Critical patent/EP0027630B1/de
Expired legal-status Critical Current

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Classifications

    • 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
    • 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
    • B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
    • 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
    • B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
    • B04B2001/2041—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl with baffles, plates, vanes or discs attached to the conveying screw
    • 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
    • B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
    • B04B2001/2066—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl with additional disc stacks

Definitions

  • the invention relates to a centrifuge for separating solid-liquid mixtures, in which at least one thickened solid phase is discharged at least partially through at least one opening arranged below the liquid level in the jacket, with at least one control device for periodically opening and closing the openings, the control device having a Screw body is connected, on which there is a screw helix, and wherein the control device is arranged rotatably relative to the drum, and whose interface parallel to the opening plane extends up to the openings and has a width which exceeds the diameter of the openings provided, the control device at least has a recess.
  • a known centrifuge has nozzles on the circumference of the drum with control devices for opening or closing the same.
  • the control devices are automatically acting valves which can be actuated by the pressure in the thickened solid phase and which allow this solid phase to be automatically discharged from the centrifuge (DE-B 1 482 708).
  • the valve-like control devices consist of complicated and high-precision mechanical parts, the sensitivity and susceptibility to failure of which are not suitable for the rough operation of a centrifuge.
  • the object of the invention is to provide a centrifuge of the type mentioned which avoids the above disadvantage.
  • the object is achieved in that the screw helix is passed through the recess in the control device and that the screw helix and the drum are conically tapered beyond the control device in the conveying direction of the screw helix.
  • the interface of the control device is cylindrical. This has the advantage that the control device can be made uncomplicated and robust and is therefore also insensitive to interference.
  • control device is designed with an elastic wiper for cleaning the openings.
  • the measure is particularly suitable in the event that a solid phase interspersed with coarser solid particles is present in addition to a sludge-liquid solid phase, which is usually discharged from the centrifuge drum with a screw discharge member.
  • control devices are provided and openings are arranged distributed in the jacket. This results in an increased sensitivity of the discharge control.
  • the distance between the opening and the control device is adjustable, the opening preferably being arranged in a nozzle body which can be screwed into the jacket from the outside.
  • the cross section of the opening of the nozzle body is expediently variable and is preferably formed by an insert made of elastic material.
  • the drum of the solid bowl screw centrifuge 2 is equipped with a number of outlet openings 3 on the circumference. These are arranged in nozzle-shaped bodies 4 in accordance with an enlarged and detailed illustration in FIGS. 2 to 6, the same parts being otherwise provided with the same reference numbers in these figures.
  • These openings 3 are covered by the control member 5 in the position shown, closed in this way, thereby preventing the flow of the thickened sludge phase.
  • this sludge phase sediments at the deepest point of the sewage pond pent up inside the drum 1, the mirror 6 of which is fixed by the height-adjustable weirs 7. These are located at the openings 8 of the front closure plate 9 of the drum 1 provided for the overflow of the center.
  • This drum 1 is otherwise received on the conically tapered side 10 by a support structure and holder 11, which in turn is rotatably supported in the bearing arrangement 12 .
  • the drum is driven via the V-belt pulley 13 by a V-belt transmission (not shown in detail) and a motor (also not shown).
  • the suspension is entered, as indicated by the arrow 14, through a feed pipe 14 ′ into the interior of the centrifuge 2.
  • the centrifuge 2 has a rotatably mounted screw body 15 which carries the screw spiral 16.
  • the direction of movement of the screw body 15 is indicated by the arrow 17.
  • the screw body 15 is rotatably supported within the drum 1 by the intermediate bearings 18 and 19.
  • the rotary motion transmitted by the V-belt drive 13 to the drum 1 is transmitted via the end plate 9 to a hollow shaft 21 'mounted in the bearing arrangement 20, and from there to a differential gear 21, which in turn is driven on the output side by the shaft 22 with the left-hand end plate 23 of the Snail body 15 is firmly connected.
  • the screw spirals 16 transport sedimented solid in the direction of arrow 24.
  • the screw spiral 16 is through a recess 25 according to the detailed illustration in FIG of the control member 5 passed.
  • 1b shows the arrangement of screw helix 16 and control disk 5 in section corresponding to section plane AA in FIG. 1.
  • the illustration according to FIG. 1b shows the cut screw body 15 with the screw helix 16 also cut, as well as the disk-shaped control device 5 in view the drum shell 1, as already described above, the nozzle body 4 with the opening 3 is screwed in from the outside.
  • the recess 25 through which - perpendicular to the viewing plane - solid is transported through the screw spiral 16.
  • the control device 5 is equipped with a rubber-elastic scraping element 26, which projects beyond the periphery 28 of the control element 5 by the amount 27. This scraper member 26 is fastened in a receptacle 29.
  • FIG. 1c The functional assignment of a control device 5 and a screw helix 16 is further illustrated in the sectional view according to FIG. 1c. It can be seen that the screw helix 16 passes through the recess 25 of the control shaft 5, the control disk 5 optically withdrawing to the edge portion 50 of the recess 25 on the right, since it is covered by the helix 16 for the viewer's eye while conversely to the left of the recess 25, the helix 16 which undercuts at an angle behind the control disk 5 is visually covered by the latter for the viewer's eye.
  • the helix 16 rotates in the direction of the arrow 17, solid is transported from the viewing plane towards the viewer.
  • the screw body 15 is equipped with the screw coils 16 and also equipped with the control element 5.
  • this is a disk-shaped member which has a width covering the opening 3.
  • the control function can be brought about either by recesses in width or recesses in diameter, the arrangement and design of which, however, fall within the skill of the skilled worker and are therefore not shown in detail in FIG.
  • FIG. 3 An embodiment of the control device 5 with a T-shaped cross section can be seen in FIG. 3.
  • FIG. 4 shows a U-shaped opening 3 curved in the direction of flow in cooperation with the disk-shaped control device 5.
  • this has control cams 51 which are placed on the end face and which close the drain opening 3 when they overlap, and in the release position to open.
  • FIG. 6 An arrangement of a nozzle body 4 containing the opening 3 with a wear-resistant insert 52 is shown in FIG. 6.
  • the control device 5 in the example shown is a disk with a T-shaped cross section.
  • the distance between the control device 5 and the wear-resistant mouthpiece 52 is designated by the number 53. This can be varied as desired by screwing the body 4 more or less deeply into the thread 54.
  • the gap width 53 is in the practical case, for example, between 20 and 500 microns.
  • the nozzle body 4 has an elastic insert 55 which is variable in cross section and which changes in diameter 57 within relatively wide limits by screwing in the screw 56 more or less deeply can be.
  • the differential gear 21 allows a differential speed to be set between the drum 1 and the worm body 15 by mechanical, electrical or hydraulic adjustment intervention, the size of which can be varied as desired.
  • the differential speed can be zero revolutions per minute on the one hand, and the speed of the drum casing 1 at zero speed of the screw body on the other hand. In practical operation, the speed difference is between 2 and 10 revolutions per minute.
  • the control device 5 rotates at a relative speed with respect to the drum casing 1 and moves with its edge part 50 past the nozzle bodies 4 receiving the openings 3.
  • this results in a gap width in the order of magnitude of, for example, 20 to 500 microns in the overlapping state, that is to say in the closed state.
  • the closed state is released and the opening 3 is released.
  • thickened sludge is expelled through the opening 3 in a controllable amount per unit of time resulting from the opening diameter, liquid pressure and viscosity.
  • the closed state between the control element 5 and the opening 3 is restored, after which the play of opening and closing is repeated periodically.
  • a technical control of the amount of sludge escaping per unit of time is possible on the one hand by the type and design of the control element and the differential speed, and on the other hand by an arbitrarily variable number of openings 3 on the circumference of the drum casing 1, and by variable choice of the diameter 57 of each Openings 3.

Landscapes

  • Centrifugal Separators (AREA)
EP80106240A 1979-10-20 1980-10-15 Zentrifuge zum Trennen von Feststoff-Flüssigkeitsgemischen Expired EP0027630B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19792942451 DE2942451A1 (de) 1979-10-20 1979-10-20 Zentrifuge zum trennen von feststoff-fluessigkeitsgemischen
DE2942451 1979-10-20
DE3036550 1980-09-27
DE19803036550 DE3036550A1 (de) 1980-09-27 1980-09-27 Zentrifuge zum trennen von feststoff-fluessigkeitsgemischen

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP83112794A Division-Into EP0115018A3 (de) 1979-10-20 1980-10-15 Zentrifuge zum Trennen von Feststoff-Flüssigkeitsgemischen
EP83112794A Division EP0115018A3 (de) 1979-10-20 1980-10-15 Zentrifuge zum Trennen von Feststoff-Flüssigkeitsgemischen

Publications (2)

Publication Number Publication Date
EP0027630A1 EP0027630A1 (de) 1981-04-29
EP0027630B1 true EP0027630B1 (de) 1984-12-12

Family

ID=25781583

Family Applications (2)

Application Number Title Priority Date Filing Date
EP80106240A Expired EP0027630B1 (de) 1979-10-20 1980-10-15 Zentrifuge zum Trennen von Feststoff-Flüssigkeitsgemischen
EP83112794A Withdrawn EP0115018A3 (de) 1979-10-20 1980-10-15 Zentrifuge zum Trennen von Feststoff-Flüssigkeitsgemischen

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP83112794A Withdrawn EP0115018A3 (de) 1979-10-20 1980-10-15 Zentrifuge zum Trennen von Feststoff-Flüssigkeitsgemischen

Country Status (6)

Country Link
US (1) US4339072A (da)
EP (2) EP0027630B1 (da)
AU (1) AU538688B2 (da)
DD (1) DD153583A5 (da)
DE (1) DE3069806D1 (da)
DK (1) DK156815C (da)

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US4575370A (en) * 1984-11-15 1986-03-11 Pennwalt Corporation Centrifuge employing variable height discharge weir
AU580696B2 (en) * 1985-11-18 1989-01-27 Decanter Pty. Limited Decanter centrifuge
DE3627826C2 (de) * 1986-08-16 1995-02-09 Westfalia Separator Ag Schleudertrommel
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DE4013388A1 (de) * 1990-04-26 1991-10-31 Titus Hans Joachim Zentrifugen-trockner
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US5403486A (en) * 1991-12-31 1995-04-04 Baker Hughes Incorporated Accelerator system in a centrifuge
DE4208104A1 (de) * 1992-01-31 1993-08-05 Kloeckner Humboldt Deutz Ag Vorrichtung und verfahren zur nassmechanischen aufbereitung von feststoffen
US5354255A (en) * 1992-12-17 1994-10-11 Alfa Laval Separation Inc. Decanter centrifuge with conveyor capable of high speed and higher flow rates
US5695442A (en) * 1995-06-06 1997-12-09 Baker Hughes Incorporated Decanter centrifuge and associated method for producing cake with reduced moisture content and high throughput
US5643169A (en) * 1995-06-06 1997-07-01 Baker Hughes Incorporated Decanter centrifuge with adjustable gate control
US5653674A (en) * 1996-03-27 1997-08-05 Baker Hughes Incorporated Decanter centrifuge with discharge opening adjustment control and associated method of operating
US5899844A (en) * 1997-06-23 1999-05-04 Eberle, Sr.; Louis C. Method of controlling the density of the solids separated from a feed slurry in a separator
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US7018326B2 (en) * 2000-08-31 2006-03-28 Varco I/P, Inc. Centrifuge with impellers and beach feed
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US6605029B1 (en) 2000-08-31 2003-08-12 Tuboscope I/P, Inc. Centrifuge with open conveyor and methods of use
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US8172740B2 (en) 2002-11-06 2012-05-08 National Oilwell Varco L.P. Controlled centrifuge systems
US8312995B2 (en) 2002-11-06 2012-11-20 National Oilwell Varco, L.P. Magnetic vibratory screen clamping
US7491263B2 (en) 2004-04-05 2009-02-17 Technology Innovation, Llc Storage assembly
US7540838B2 (en) * 2005-10-18 2009-06-02 Varco I/P, Inc. Centrifuge control in response to viscosity and density parameters of drilling fluid
US7540837B2 (en) * 2005-10-18 2009-06-02 Varco I/P, Inc. Systems for centrifuge control in response to viscosity and density parameters of drilling fluids
US20080083566A1 (en) 2006-10-04 2008-04-10 George Alexander Burnett Reclamation of components of wellbore cuttings material
US8622220B2 (en) 2007-08-31 2014-01-07 Varco I/P Vibratory separators and screens
US9073104B2 (en) 2008-08-14 2015-07-07 National Oilwell Varco, L.P. Drill cuttings treatment systems
US8556083B2 (en) 2008-10-10 2013-10-15 National Oilwell Varco L.P. Shale shakers with selective series/parallel flow path conversion
US9079222B2 (en) 2008-10-10 2015-07-14 National Oilwell Varco, L.P. Shale shaker
DE102009024029A1 (de) * 2009-06-05 2010-12-09 Winkelhorst, Markus Selbstentleerender Tellerseparator
DK2582440T3 (da) 2010-06-15 2019-07-22 Centrisys Corp Centrifugal væskeseparationsmaskine med brug af trykluft til at fremme faststoffremføring
WO2012003407A2 (en) 2010-07-01 2012-01-05 Michael Kopper Centrifugal liquid separation machine to efficiently flow multi-phase solids from a heavy phase discharge stream
DK178254B1 (da) * 2010-11-12 2015-10-12 Alfa Laval Corp Ab Centrifugalseparator, slidbestandigt element og sæt af slidbestandige elementer til en centrifugalseparator
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EP3727639B1 (en) * 2017-12-19 2023-06-14 Xeros Limited Filter for a treatment apparatus
CN110918454B (zh) * 2019-11-15 2021-05-28 安徽省宣城市联通塑业有限责任公司 一种物料筛分装置

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Also Published As

Publication number Publication date
US4339072A (en) 1982-07-13
DK156815B (da) 1989-10-09
DK156815C (da) 1990-03-05
DE3069806D1 (en) 1985-01-24
AU6325780A (en) 1981-04-30
AU538688B2 (en) 1984-08-23
DD153583A5 (de) 1982-01-20
EP0115018A2 (de) 1984-08-08
DK441780A (da) 1981-04-21
EP0027630A1 (de) 1981-04-29
EP0115018A3 (de) 1985-10-30

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