EP0247401A2 - Centrifugeuse à filtration - Google Patents

Centrifugeuse à filtration Download PDF

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Publication number
EP0247401A2
EP0247401A2 EP87106568A EP87106568A EP0247401A2 EP 0247401 A2 EP0247401 A2 EP 0247401A2 EP 87106568 A EP87106568 A EP 87106568A EP 87106568 A EP87106568 A EP 87106568A EP 0247401 A2 EP0247401 A2 EP 0247401A2
Authority
EP
European Patent Office
Prior art keywords
gas
filter
pressure
discharge line
space
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.)
Granted
Application number
EP87106568A
Other languages
German (de)
English (en)
Other versions
EP0247401A3 (en
EP0247401B1 (fr
Inventor
Günther Hultsch
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.)
Mannesmann Demag Krauss Maffei GmbH
Original Assignee
Krauss Maffei 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 Krauss Maffei AG filed Critical Krauss Maffei AG
Publication of EP0247401A2 publication Critical patent/EP0247401A2/fr
Publication of EP0247401A3 publication Critical patent/EP0247401A3/de
Application granted granted Critical
Publication of EP0247401B1 publication Critical patent/EP0247401B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B04B11/00—Feeding, charging, or discharging bowls
    • B04B11/08—Skimmers or scrapers for discharging ; Regulating thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B13/00—Control arrangements specially designed for centrifuges; Programme control of centrifuges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B15/00—Other accessories for centrifuges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B3/00—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering

Definitions

  • the invention relates to a device for filtering suspensions in a filter centrifuge according to the preamble of claim 1.
  • a centrifuge of this type is known from CH-PS 580 986, in which the gas space radially adjoining the filter medium is connected to an external air suction device.
  • the so-called dry spin or pressure gas filtration in which gas flows through the filter cake, only a pressure difference can be set between the surface of the filter cake and the gas space, which is between the atmospheric pressure and the vapor pressure of the filtrate.
  • the generation of the negative pressure by the air suction device is relatively complex. Larger gas volumes must also be promoted when generating negative pressure.
  • the invention is therefore based on the object to achieve a greater pressure difference between the surface of the filter cake and the gas space behind the filter medium in the pressure gas filtration in order to improve the pressure gas filtration achievable by friction and the drying effects.
  • the gas discharge line is expediently provided with a shut-off valve, through which a gas cushion can be created in the gas discharge line, which, for example, prevents liquid from penetrating into the gas return line when the filter medium is backwashed.
  • the section of the gas discharge line arranged in the side wall of the filter centrifuge consists of a spacer grille arranged on the side wall, which extends from the hollow bore in the shaft of the filter centrifuge into the gas space and which has a disk on the side facing the interior of the centrifuge drum is covered from liquid and gas tight material.
  • This disk-shaped section of the gas discharge line acts as a droplet separator, since the gas which relaxes after passing through the solid cake flows radially inwards at a low flow rate due to the greatly enlarged flow cross section.
  • the disc resting on the spacer grille is made of rubber, so that it can be easily installed and replaced even when the filter centrifuge is very narrow.
  • the gas discharge line can optionally be connected to the overpressure generating means.
  • the gas is fed back from the gas discharge line to the suction side of the excess pressure generating means.
  • a suction pressure pump is preferably used as the excess pressure generating means, the suction side of which is connected to the gas discharge line and the pressure side of which is connected to the interior of the filter centrifuge.
  • gases and vapors of various types for example vaporous solvents, can be used in the closed circuit.
  • condensers, heating or cooling devices can be arranged as required.
  • a peeling knife which can be swiveled into the solid cake is provided with a collecting trough, to which a discharge pipe passing through the pressure housing is connected. This is equipped with a shut-off valve, after its opening the solid matter falling into the collecting trough is conveyed to the outside through the discharge pipe by the compressed gas in the pressure housing.
  • the overpressure generating means and / or the adjusting device of the peeling tube and / or the rotary drive for the filter centrifuge according to one or more of the measured variables of a pressure sensor arranged in the pressure housing , a peeling tube angle position indicator and a tachometer for the speed of the filter centrifuge controllable. It is useful to set the specific modes of operation via a programmed controller, so that, for. B.
  • the size r i can be converted into a size r i ⁇ by changing the pressure ratios, as a result of which the filtrate is pressed radially inwards through the filter medium, but it is ensured that no filtrate enters the shaft located section of the gas discharge line penetrates.
  • the filter centrifuge 1 consists of a solid jacket drum 2 which has a ring weir 3 on one side and the drum base 4 on the other side, in which the shaft 5 is fastened.
  • a cylindrical filter medium 6 is arranged within the solid jacket drum 2 and is attached on one side to the ring weir 3 and on the other side to the drum base 4.
  • a filtrate collecting space 7 is enclosed between the filter medium 6 and the solid jacket drum 2, which is composed of a gas space 7a directly adjoining the filter medium 6 and a filtrate liquid space 7b.
  • the filtrate liquid space 7b is connected via an outlet opening 8 arranged in the drum base 4 to an annular space 9 into which a peeling tube 10 projects.
  • a spacer grid 11 and a disk 12 made of elastomeric material are fastened to the drum base 4 and are sealed in the radially outer area from the filter medium 6 by means of a circumferential ring seal 13.
  • the space formed by the drum base 4, the spacer grid 11 and the disk 12 represents a partial area of a gas discharge line 14, which leads from the gas chamber 7a via the spacer grid 11 and a hollow bore in the shaft 5 to a rotary feedthrough 15.
  • the filter centrifuge 1 is enclosed by a pressure housing 16 in which the shaft 5 is mounted. Outside the pressure housing 16, the shaft 5 has a V-belt pulley 17 with which the filter centrifuge can be driven by the drive unit 19 via V-belts 18.
  • the pressure housing 16 On the side opposite the drive unit, the pressure housing 16 is penetrated by an inlet pipe 20, through which the filter centrifuge 1 suspension can be fed, the solid components of which settle on the filter medium 6 in the form of a solid cake 21 after dewatering.
  • the pressure housing 16 is also penetrated by the discharge tube 22 of a peeling device 23, which has a collecting trough 24 and a peeling knife 25 arranged in the interior of the filter centrifuge 1 and has a shut-off valve 22a outside the pressure housing 16.
  • a compressed gas line 26 leads into the interior of the pressure housing 16 and is fed by a compressor 27, the delivery rate of which can be controlled by a controllable drive motor 28.
  • the feed line 29 of the compressor 27 is connected to the gas discharge line 14, and a check valve 30, a condenser 30, a cooler 32 and a heater 33 can optionally be connected between the compressor 27 and the rotary union 15. Furthermore, a 4/2-way valve 34 can be arranged in the feed line 29 and in the pressure gas line 26, with which pressure gas can be applied to the interior of the pressure housing 16 in the position shown and with the gas discharge line 14 in the other switching position for the purpose of Reverse current application of the filter medium 6 compressed gas can be supplied.
  • a pressure sensor 35 for measuring the excess pressure p u is arranged in the interior of the pressure housing 16.
  • the peeling tube 10 has a device 36 for measuring the angular position ⁇ of the peeling tube, which is directly proportional to the radial liquid level r a in the annular space 9.
  • the device 36 for measuring the angular position ⁇ of the peeling tube 10 is coupled to a rotary actuator 37, with which the angular position ⁇ of the peeling tube 10 and thus also the liquid level r a in the annular space 9 can be adjusted.
  • a tachometer 38 is arranged, with which the speed or the angular velocity ⁇ of the shaft 5 can be measured.
  • the pressure sensor 35, the device 36 for measuring the angular position ⁇ of the peeling tube 10 and the tachometer 38 are connected via measured value lines 39, 40 and 41 to a control unit 42 in which the measured values transmitted from the measured value lines 39, 40 and 41 are connected for the overpressure p ü , the angular position ⁇ or the liquid level r a and the speed or angular velocity ⁇ are processed after appropriate preparation and forming, whereupon the drive motor 28, the drive unit 19 and the rotary actuator 37 can be controlled via the control lines 43, 44 and 45 shown in solid lines in accordance with certain selectable operating programs stored in the control unit 42.
  • the filter centrifuge in one embodiment, in which a compressor 27 is drawn in from the atmosphere as a positive pressure generating means, the compressed air is conducted via the pressure line 26 into the interior of the pressure housing 16.
  • the suspension the solids of which settle in the centrifugal field on the filter medium 6 in the form of a solid cake 21, is fed to the filter centrifuge 1 via the inlet pipe 20.
  • the filtrate enters the filtrate collecting space 7, a gas space 7a and a filtrate liquid space 7b with the radial liquid level r i being formed.
  • the filtrate passes through the discharge opening 8 into the annular space 9, the radial liquid level r a of which is determined by the angular position ⁇ of the peeling tube 10.
  • the gas can flow freely into the atmosphere or, as shown in the drawing, can be fed back in a closed circuit via the feed line 29 to the suction side of the compressor 27.
  • a capacitor 31, a cooler 32 or a heater 33 are acted.
  • These devices can also be arranged at a position other than that shown.
  • the heater 33 can be connected downstream of the compressor 27 in order to avoid the solid cake 21 to be able to apply greater heat losses with the hotest possible gas.
  • gases vapors of chemically or biologically reactive substances can also be conducted in a closed circuit.
  • the direction of flow of the gas can also be reversed (switch position not shown) in order to allow the filter medium 6 to flow through in the opposite direction for the purpose of loosening the solid cake 21.
  • the gas discharge line 14 is first shut off by means of the check valve 30. Then the peeling device 23 is pivoted by pivoting the discharge tube 22 in the direction of arrow 22b, whereupon the peeling knife 25 is pressed into the solid cake 21 and the solid parts detached from the solid cake 21 at a reduced speed of the filter centrifuge 1 fall into the collecting trough 24. After opening the shut-off valve, the solids are conveyed to the outside through the discharge pipe 22 by means of the compressed gas.
  • the speed or the angular velocity ⁇ of the filter centrifuge 1 the height .DELTA.h of the liquid column and the pressure difference .DELTA.p, controlled by the control unit 42, are coordinated with one another in such a way that in any case penetration of filtrate liquid into the horizontal area of the gas discharge line 14 is connected.
  • the parameters .DELTA.p, and .DELTA.h are coordinated with one another in normal operation so that gas or vapors flow through the solid cake 21 with the greatest effectiveness.
  • the aforementioned parameters are coordinated with one another in such a way that, at a reduced speed of the filter centrifuge 1, a good loosening effect for the solid cake, a good cleaning effect for an added filter medium 6 and a good discharge rate for peeled solids.
  • the control valve 42 can also be used to control the shut-off valve 22a, the pivoting device for the discharge pipe 22, the shut-off valve 3, the 4/2-way valve 34, the condenser 31, the cooler 32 and the heater 33 in order to ensure fully automatic operation with constant To achieve a succession of loading, drying, discharge and backwashing phases.

Landscapes

  • Centrifugal Separators (AREA)
EP87106568A 1986-05-27 1987-05-06 Centrifugeuse à filtration Expired - Lifetime EP0247401B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3617768 1986-05-27
DE19863617768 DE3617768A1 (de) 1986-05-27 1986-05-27 Filterzentrifuge

Publications (3)

Publication Number Publication Date
EP0247401A2 true EP0247401A2 (fr) 1987-12-02
EP0247401A3 EP0247401A3 (en) 1987-12-23
EP0247401B1 EP0247401B1 (fr) 1992-01-08

Family

ID=6301710

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87106568A Expired - Lifetime EP0247401B1 (fr) 1986-05-27 1987-05-06 Centrifugeuse à filtration

Country Status (4)

Country Link
US (1) US4997575A (fr)
EP (1) EP0247401B1 (fr)
JP (1) JPH0720558B2 (fr)
DE (1) DE3617768A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0335278A2 (fr) * 1988-03-31 1989-10-04 E.I. Du Pont De Nemours And Company Contrôle de la pompe de vidange d'un appareil centrifuge
EP0342455A2 (fr) * 1988-05-19 1989-11-23 Krauss-Maffei Aktiengesellschaft Centrifugeuse filtrante pour la séparation de suspensions
RU2468870C2 (ru) * 2007-04-03 2012-12-10 Сергей Александрович Харитонов Центрифуга непрерывного действия с цилиндрической саморазгружающейся фильтрующей стенкой

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5227066A (en) * 1988-11-10 1993-07-13 Hitachi, Ltd. Apparatus for separating living cells
DE4032402A1 (de) * 1990-10-12 1992-04-16 Menninger Iro Gmbh Verfahren und einrichtung zur fadensteuerung bei maschenbildenden textilmaschinen
US5246600A (en) * 1992-01-24 1993-09-21 Reichner Thomas W Centrifugal vacuum filter
US5332499A (en) * 1992-10-28 1994-07-26 Spencer Glenn E Self-cleaning filter
US5250180A (en) * 1992-11-10 1993-10-05 Fwu Kuang Enterprises Co., Ltd. Oil recovering apparatus from used lubricant
US5326470A (en) * 1992-12-08 1994-07-05 Bird Escher Wyss Inc. Non-compressive loading of a screen basket for a pulp pressure screening apparatus
US6440316B1 (en) 2000-03-21 2002-08-27 Virginia Tech Intellectual Properties, Inc. Methods of improving centrifugal filtration
JP4483370B2 (ja) * 2004-03-30 2010-06-16 Ｄｉｃ株式会社 遠心濾過機の基礎層除去方法
BRPI0515177A (pt) * 2004-09-13 2007-11-13 Steve C Benesi métodos para separar uma quantidade de suspensão em sólidos e lìquidos e de separar uma quantidade de suspensão em sólidos em suspensão e lìquidos em suspensão, filtro de pressão para filtrar uma suspensão, métodos para separar uma porção de lìquido de uma porção de sólido de uma suspensão de lìquido/sólido misturados e para otimizar a eficácia de secagem em um processo de separação de lìquido/sólido, e, sistema para separar sólidos de lìquidos de uma suspensão de lìquido/sólido
US7686965B2 (en) * 2006-05-31 2010-03-30 Cook Melvin W Centrifugal fluid filtration devices, systems and methods
JP5026387B2 (ja) * 2008-10-17 2012-09-12 株式会社西原環境 遠心分離装置
FR2962049B1 (fr) * 2010-07-02 2015-04-24 Veolia Water Solutions & Tech Dispositif de traitement d'eau comprenant un tambour filtrant plein
RU2631951C1 (ru) * 2017-01-19 2017-09-29 Федеральное казенное предприятие "Научно-исследовательский институт "Геодезия" (ФКП "НИИ "Геодезия") Вакуумная центрифуга
AU2018390481A1 (en) * 2017-12-19 2020-07-09 Xeros Limited Filter for a treatment apparatus
KR102445715B1 (ko) * 2019-11-11 2022-09-21 주식회사 엘지화학 원심 탈수기 및 원심 탈수 방법
KR102504657B1 (ko) * 2019-11-18 2023-02-27 주식회사 엘지화학 가압 원심 탈수기

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1374135A (fr) * 1962-11-14 1964-10-02 Escher Wyss Sa Centrifugeuse pousseuse
DE2056893A1 (de) * 1970-06-09 1972-05-04 Titus, Hans-Joachim, 6148 Heppenheim Vorrichtung zum Schälen und pneumatischen Austragen von Filterzentrifugen. Ausscheidung aus: 2028267
US3709428A (en) * 1970-04-13 1973-01-09 Garrett Corp Centrifuge vent
US3864256A (en) * 1972-12-11 1975-02-04 Krauss Maffei Ag Filter centrifuge and method of operating same
DE2649037A1 (de) * 1975-11-14 1977-06-08 Sandoz Ag Verfahren zur konstanthaltung des suspensionsniveaus in einer filterzentrifuge und filter-zentrifuge zur durchfuehrung des verfahrens

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3385443A (en) * 1967-08-14 1968-05-28 Cuza Cerso Roberto Continuously operating centrifugal device
US3504794A (en) * 1968-02-12 1970-04-07 Laval Separator Co De Method and apparatus for controlling operation of a centrifugal
DE2603610A1 (de) * 1976-01-30 1977-08-04 Krauss Maffei Ag Zentrifugentrommel mit seitenfiltration

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1374135A (fr) * 1962-11-14 1964-10-02 Escher Wyss Sa Centrifugeuse pousseuse
US3709428A (en) * 1970-04-13 1973-01-09 Garrett Corp Centrifuge vent
DE2056893A1 (de) * 1970-06-09 1972-05-04 Titus, Hans-Joachim, 6148 Heppenheim Vorrichtung zum Schälen und pneumatischen Austragen von Filterzentrifugen. Ausscheidung aus: 2028267
US3864256A (en) * 1972-12-11 1975-02-04 Krauss Maffei Ag Filter centrifuge and method of operating same
DE2649037A1 (de) * 1975-11-14 1977-06-08 Sandoz Ag Verfahren zur konstanthaltung des suspensionsniveaus in einer filterzentrifuge und filter-zentrifuge zur durchfuehrung des verfahrens

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0335278A2 (fr) * 1988-03-31 1989-10-04 E.I. Du Pont De Nemours And Company Contrôle de la pompe de vidange d'un appareil centrifuge
EP0335278A3 (en) * 1988-03-31 1990-08-22 E.I. Du Pont De Nemours And Company Evacuation pump control for a centrifuge instrument
EP0342455A2 (fr) * 1988-05-19 1989-11-23 Krauss-Maffei Aktiengesellschaft Centrifugeuse filtrante pour la séparation de suspensions
EP0342455A3 (en) * 1988-05-19 1990-11-07 Krauss-Maffei Aktiengesellschaft Filter centrifuge for the separation of suspensions
RU2468870C2 (ru) * 2007-04-03 2012-12-10 Сергей Александрович Харитонов Центрифуга непрерывного действия с цилиндрической саморазгружающейся фильтрующей стенкой

Also Published As

Publication number Publication date
JPH0720558B2 (ja) 1995-03-08
JPS62289251A (ja) 1987-12-16
DE3617768A1 (de) 1987-12-03
EP0247401A3 (en) 1987-12-23
US4997575A (en) 1991-03-05
DE3617768C2 (fr) 1991-10-10
EP0247401B1 (fr) 1992-01-08

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