EP0189164A2 - Procédé et dispositif de régulation de la différence de vitesse de rotation entre le tambour et la vis transporteuse d'une centrifugeuse à vis - Google Patents

Procédé et dispositif de régulation de la différence de vitesse de rotation entre le tambour et la vis transporteuse d'une centrifugeuse à vis Download PDF

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Publication number
EP0189164A2
EP0189164A2 EP86100699A EP86100699A EP0189164A2 EP 0189164 A2 EP0189164 A2 EP 0189164A2 EP 86100699 A EP86100699 A EP 86100699A EP 86100699 A EP86100699 A EP 86100699A EP 0189164 A2 EP0189164 A2 EP 0189164A2
Authority
EP
European Patent Office
Prior art keywords
hydraulic
screw conveyor
centrifuge
hydraulic fluid
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.)
Withdrawn
Application number
EP86100699A
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German (de)
English (en)
Inventor
Paul Krämer
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
Application filed by Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Publication of EP0189164A2 publication Critical patent/EP0189164A2/fr
Withdrawn legal-status Critical Current

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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
    • B04B1/20—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
    • B04B1/2016—Driving control or mechanisms; Arrangement of transmission gearing

Definitions

  • the invention relates to a method and a device for regulating the differential speed between the centrifuge drum and the screw conveyor of a screw centrifuge, the centrifuge drum and screw conveyor of which are each driven by a hydraulic motor, the torque of the screw conveyor and / or the centrifuge drum being measured or monitored and depending on it of the torque, the hydraulic fluid quantity supplied to the hydraulic motors is changed.
  • the object of the invention is to provide a method which, while avoiding the abovementioned disadvantages with optimum load distribution to the screw conveyor and centrifuge drum, provides a stepless and practically energy loss-free control of the Differential speed between the centrifuge drum and the screw conveyor allows in a particularly simple manner.
  • the considerably lower energy expenditure for the operation of the screw centrifuge according to the invention compared to known screw centrifuges of a similar design, also has the advantage that the drive motor and feed pump can be designed with lower energy requirements and can be dimensioned correspondingly smaller in terms of their construction, which means a not insignificant reduction Acquisition cost is achieved.
  • the sum of the hydraulic fluid quantities supplied to the hydraulic motors is kept constant. This is Particularly expedient if the suspension to be dewatered is a suspension with a substantially constant mixture of solids and liquids.
  • the device for carrying out the method according to the invention consists of a screw centrifuge 1, the centrifuge drum 2 and screw conveyor 3 of which are each connected to a hydraulic motor 4 and 5.
  • the hydraulic motor 4 is coupled to the worm shaft 6 of the screw conveyor 3 and takes over its drive, while the hydraulic motor 5 arranged on the frame of the centrifuge takes over the drive of the centrifuge drum 2 via V-belts 7 and via a housing of the hydraulic motor 4 connected to the centrifuge drum .
  • Hydraulic fluid supply lines 8 and 9 are connected to the hydraulic motors 4 and 5 and are connected to control valves 11 and 12 arranged in a control block 10.
  • the control valves 11 and 12 are designed as three-way valves.
  • the control valve 12 is connected via a pressure line 13 to a hydraulic pump 14, which can be designed very advantageously as an axial piston pump and which, in operation, takes pressure fluid 15 from a reservoir 16 via a suction line 15.
  • a hydraulic pump 14 which can be designed very advantageously as an axial piston pump and which, in operation, takes pressure fluid 15 from a reservoir 16 via a suction line 15.
  • the screw conveyor 3 and the centrifuge drum 2 are driven by the hydraulic motors 4 and 5 at a predetermined differential speed which is optimally adjusted to the respective solid-liquid mixture to be separated.
  • the torque of the screw conveyor 3 and / or the centrifuge drum 2 is measured or monitored in a manner known per se and as a function of the torque, which changes the quantity of hydraulic fluid supplied to the hydraulic motors 4 and 5 via the hydraulic fluid supply lines 8 and 9.
  • the change in the quantity of hydraulic fluid supplied to the hydraulic motors 4 and 5 takes place in accordance with Invention in such a way that with increasing torque of the screw conveyor 3 via the control valves 11 and 12, the hydraulic fluid quantity 4 supplied to the screw conveyor 3 is increased by an amount by which the hydraulic fluid quantity 5 supplied to the centrifuge drum 2 is reduced.
  • the difference in speed between the centrifuge drum 2 and the screw conveyor 3 can be maintained, increased or reduced very advantageously with increasing solids content in the sludge to be dewatered in the screw centrifuge 1, without special additional pumping units or the like.
  • the differential speed between the centrifuge drum 2 and the screw conveyor 3 is regulated in the opposite manner according to the invention , namely by the falling torque of the screw conveyor, the amount of hydraulic fluid supplied to the hydraulic motor 4 of the screw conveyor 3 via the hydraulic fluid supply line 8 is reduced by an amount corresponding to the decreasing torque via the control valves 11 and 12 and at the same time that of the hydraulic motor 5
  • Centrifuge drum 2 increased by the amount of hydraulic fluid supplied via the hydraulic fluid supply line 9.
  • the quantity of pressure fluid conveyed by the hydraulic pump 14 and circulated via the hydraulic motors 4 and 5 and reservoir 16 remains constant.
  • the main advantage of this inventive control of the differential speed between the centrifuge drum 2 and the screw conveyor 3 compared to known control systems is that the entire energy applied by the drive motor 17 of the hydraulic pump 14 - except for the insignificantly low usual friction losses - for driving the screw centrifuge 1 and Regulation of the differential speed between the centrifuge drum 2 and the screw conveyor 3 can be fully utilized, whereby a considerable reduction in systems and in particular operating costs is achieved compared to known drive systems of a similar design.
  • the measures according to the invention thus enable the screw centrifuge to be optimally adapted to the particular solid-liquid mixture to be separated in a particularly simple manner and practically without energy losses, by simply changing the quantity of the hydraulic motors 4 and 5 via the hydraulic fluid feed lines 8 and 9 with the aid of the control valves 11 and 12 increasing solids concentration in the feed material and with the same throughput, the differential speed between the centrifuge drum 2 and the screw conveyor 3 is increased accordingly and when the solids concentration in the feed material is reduced, the differential speed between the centrifuge drum 2 and the screw conveyor 3 is reduced accordingly.
  • the screw centrifuge can be adapted in a simple manner with the regulation designed according to the invention while maintaining optimal separation results to a feed material with very different and strongly fluctuating solids concentrations, for example, with a very low solids concentration in the feed material Line 20 'is discharged from the control block 10 into the liquid reservoir 16, or if the solids concentration in the feed material is very high, the delivery capacity of the hydraulic pump 14 is increased accordingly.
  • the hydraulic pump 14 is therefore equipped with a power controller, not shown in the drawing.
  • the solid-liquid mixture or the suspension to be separated is fed to the centrifuge drum and the quantity of hydraulic fluid supplied to the hydraulic motors 4 and 5 is adjusted or redistributed on the basis of control curves via the control valves 11 and 12 such that the screw conveyor 3 and the centrifuge drum 2 circulate at a differential speed which, in addition to optimal separation of the solid-liquid mixture, ensures trouble-free discharge of solids.
  • the regulation of the differential speed between the centrifuge drum 2 and the screw conveyor 3 takes place automatically according to the invention in the manner already described, namely when increasing the amount of solids in the feed material, the differential speed is supplied by simple quantitative redistribution of the hydraulic motors 4 and 5 via the hydraulic fluid supply lines 8 and 9 Hydraulic fluid increased accordingly and when the amount of solids in the feed decreases, the differential speed between the screw conveyor and the centrifuge drum is reduced accordingly.
  • the screw centrifuge 1 with the hydraulic motors 4 and 5 can be arranged separately (dash-dotted line 23) from the drive motor 17 or 18, hydraulic pump 14 with control block 10 and hydraulic fluid reservoir 16 in a gas and / or pressure-tight space.
  • the units arranged below the dash-dotted line 23 in the drawing can also be accommodated very advantageously in a dry and / or soundproof space in a simple and space-saving manner due to their compact design in a space-saving manner.

Landscapes

  • Centrifugal Separators (AREA)
EP86100699A 1985-01-24 1986-01-20 Procédé et dispositif de régulation de la différence de vitesse de rotation entre le tambour et la vis transporteuse d'une centrifugeuse à vis Withdrawn EP0189164A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3502252 1985-01-24
DE19853502252 DE3502252A1 (de) 1985-01-24 1985-01-24 Verfahren und vorrichtung zur regelung der differenzdrehzahl zwischen der zentrifugentrommel und der foerderschnecke einer schneckenzentrifuge

Publications (1)

Publication Number Publication Date
EP0189164A2 true EP0189164A2 (fr) 1986-07-30

Family

ID=6260610

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86100699A Withdrawn EP0189164A2 (fr) 1985-01-24 1986-01-20 Procédé et dispositif de régulation de la différence de vitesse de rotation entre le tambour et la vis transporteuse d'une centrifugeuse à vis

Country Status (3)

Country Link
US (1) US4668213A (fr)
EP (1) EP0189164A2 (fr)
DE (1) DE3502252A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022271802A1 (fr) * 2021-06-24 2022-12-29 Elgin Separation Solutions Industrials, Llc Centrifugeuse de décantation hydraulique à commande électronique

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US5529566A (en) * 1990-12-11 1996-06-25 Weil; Hans A. Method for controlling a solid-shell centrifuge
US5156751A (en) * 1991-03-29 1992-10-20 Miller Neal J Three stage centrifuge and method for separating water and solids from petroleum products
US5342279A (en) * 1992-08-18 1994-08-30 Alfa Laval Separation Inc. Decanter centrifuge having dual motor drive
US5344570A (en) * 1993-01-14 1994-09-06 James E. McLachlan Method and apparatus for removing solids from a liquid
DK0868215T3 (da) * 1995-12-01 2002-05-06 Baker Hughes Inc Fremgangsmåde og apparat til styring og overvågning af en centrifuge med kontinuerlig tilførsel
US5857955A (en) * 1996-03-27 1999-01-12 M-I Drilling Fluids L.L.C. Centrifuge control system
US5919123A (en) * 1997-01-29 1999-07-06 M-I Drilling Fluids L.L.C. Method for controlling a centrifuge system utilizing stored electrical energy generated by braking the centrifuge bowl
US6368264B1 (en) * 1999-03-29 2002-04-09 M-I L.L.C. Centrifuge control system and method with operation monitoring and pump control
US6605029B1 (en) * 2000-08-31 2003-08-12 Tuboscope I/P, Inc. Centrifuge with open conveyor and methods of use
US6905452B1 (en) * 2002-04-26 2005-06-14 Derrick Manufacturing Corporation Apparatus for centrifuging a slurry
US20050242003A1 (en) 2004-04-29 2005-11-03 Eric Scott Automatic vibratory separator
US7387602B1 (en) * 2002-04-26 2008-06-17 Derrick Corporation Apparatus for centrifuging a slurry
GB2393142B (en) * 2002-09-21 2004-11-10 Incentra Ltd Centrifuge with viscous clutch for decanter drive mechanism
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
US20060105896A1 (en) * 2004-04-29 2006-05-18 Smith George E Controlled centrifuge systems
US20040138040A1 (en) * 2003-01-15 2004-07-15 Hensley Gary L. Decanter centrifuge control
AU2003224114A1 (en) * 2003-04-22 2004-11-19 Viscotherm Ag Centrifuge comprising hydraulic differential speed determination
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
US20110034313A1 (en) * 2009-08-06 2011-02-10 Andritz Separation Inc. Centrifuge with hydraulic drive unit
US9643111B2 (en) 2013-03-08 2017-05-09 National Oilwell Varco, L.P. Vector maximizing screen
CN104084317A (zh) * 2013-08-15 2014-10-08 飞翼股份有限公司 一种煤矿井下专用固液分离机

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DE2551788A1 (de) * 1975-11-18 1977-06-02 Flottweg Werk Bruckmayer Vollmantel-schneckenzentrifuge mit differenzdrehzahlvariabler kupplung zwischen mantelteil und schneckenteil
GB1583517A (en) * 1977-05-04 1981-01-28 Jackson J F Solid bowl decanter centrifuges of the scroll discharge type
DE2842575A1 (de) * 1977-10-04 1979-04-12 Broadbent & Sons Ltd Thomas Vollmantel-abklaerzentrifuge
CH647959A5 (de) * 1980-05-16 1985-02-28 Glyco Antriebstechnik Gmbh Dekanterzentrifuge mit hydraulischem differenzantrieb.
DE3103029A1 (de) * 1981-01-30 1982-08-26 Klöckner-Humboldt-Deutz AG, 5000 Köln Schneckenzentrifuge
DE3115692A1 (de) * 1981-04-18 1982-11-11 Klöckner-Humboldt-Deutz AG, 5000 Köln Adaptives regelverfahren

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022271802A1 (fr) * 2021-06-24 2022-12-29 Elgin Separation Solutions Industrials, Llc Centrifugeuse de décantation hydraulique à commande électronique

Also Published As

Publication number Publication date
US4668213A (en) 1987-05-26
DE3502252A1 (de) 1986-07-24

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Inventor name: KRAEMER, PAUL