EP0138920B1 - Installation pour separer la partie liquide de la partie solide d'une barbotine ceramique - Google Patents

Installation pour separer la partie liquide de la partie solide d'une barbotine ceramique Download PDF

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Publication number
EP0138920B1
EP0138920B1 EP84901328A EP84901328A EP0138920B1 EP 0138920 B1 EP0138920 B1 EP 0138920B1 EP 84901328 A EP84901328 A EP 84901328A EP 84901328 A EP84901328 A EP 84901328A EP 0138920 B1 EP0138920 B1 EP 0138920B1
Authority
EP
European Patent Office
Prior art keywords
screw
filter medium
worm
housing
slime
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
EP84901328A
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German (de)
English (en)
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EP0138920A1 (fr
Inventor
Dietrich Dr. Ing. Schlegel
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0138920A1 publication Critical patent/EP0138920A1/fr
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Publication of EP0138920B1 publication Critical patent/EP0138920B1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/26—Permeable casings or strainers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing

Definitions

  • the invention relates to a device for separating the liquid component from the solid component of a liquid, finely dispersed material, in particular a ceramic slip, with a driven screw housed in a cylindrical housing, with a filter medium surrounding the screw, which is arranged on the housing and secured against rotation, which is provided with a plurality of circumferential grooves arranged at a distance and opening into a filtrate discharge, with a material feed at one housing end and with a narrow solids discharge located in the screw axis at the other housing end.
  • a device according to the preamble of claim 1 is known (FR-A-2 310 867), in which a screw conveyor is surrounded by a filter medium made of sintered metal and is accommodated within a cylindrical housing which supports the filter medium from the outside.
  • the filter cake settling on the filter medium is carried along from the screw to the solid discharge, the filter cake sliding in the form of a block flow on the filter medium.
  • This filter cake not only represents a considerable flow resistance for the filtrate drain, in the case of abrasive particles of the finely dispersed material, the filter cake also causes considerable abrasion on the filter medium, which not only reduces the life of the filter medium and thus the device, but also the pores of the Can clog filter media, so that there is an impairment of the filtrate discharge.
  • the object of the invention is to provide a generic device with which the abrasion of the filter medium is largely reduced and the filtrate outflow is increased.
  • the filter medium is arranged in the housing to form a flat-cut screw channel and is covered on the surface facing the screw with a sufficiently wide-meshed grid, on the one hand the build-up of a thick filter cake which is carried by the rotating screw is prevented and on the other hand the build-up of high pressures within the Device enables, above all, the filtrate flow and thus the performance of the device is increased.
  • a thin filter cake forms, which does not rotate with the rotating screw, but rests on the surface of the filter medium. This thin filter cake does not affect the filtrate removal, but prevents abrasion on the filter medium.
  • the resting filter cake layer also contributes to the filtration.
  • the grid also improves the conveying effect and the pressure build-up in the screw channel.
  • the cake which is at rest relative to the filter medium can be formed, on the basis of which the filter medium is protected against wear.
  • the thickness of the cake must of course be as small as possible so as not to unnecessarily impede the filtrate closure.
  • the filtration is additionally promoted by the resting filter cake layer.
  • the housing has a mouthpiece on the solids discharge, the opening cross section of which is controlled as a function of the pressure generated by the screw at the end of the screw channel in such a way that this pressure has a predetermined desired value.
  • This regulation of the mouthpiece provided on the solids discharge and thus the regulation of the moisture of the extruded plastic material depending on the pressure that the extruded material exerts on the screw end of the screw on the screw cylinder is of considerable importance for the success of the operation of the device.
  • This pressure can be measured with a pressure transducer built into the screw barrel. Tests have shown a direct connection between the moisture of the extruded plastic material and this pressure. If this pressure is kept constant in accordance with the proposal according to the invention, then the moisture of the extruded material also remains constant. This pressure is easier to measure than the humidity and is therefore suitable as a control variable for the opening cross section of the mouthpiece.
  • highly porous support means are arranged on the side of the filter means facing the channel system between the cylindrical housing and the filter means, thereby ensuring additional support of the filter means under high pressures.
  • abrasion-resistant tabs which are arranged on intermediate rings secured against rotation, or abrasion-resistant screen fabric. This not only ensures the build-up of a resting filter cake layer on the filter medium, but also increases the conveying effect of the screw.
  • the wire thickness of the sieve fabric should be as small as possible.
  • the free cross-section of the screen fabric should be as large as possible.
  • Fig. 1 the device for separating the liquid fraction from the solid fraction of a finely dispersed liquid material, e.g. of a ceramic slip generally designated 1. It contains a filter cylinder 2 in a housing 3, at one end of which the solid discharge is provided at 11.
  • the adjustment device for the opening cross section of the solids discharge is provided.
  • 3a indicates a pressure transmitter for measuring the final pressure in the screw channel.
  • the Schlikker is fed via the pressure line 6 from a pump 7, preferably a membrane pump, under pressure into the filter cylinder 2.
  • the suction line of the pump 7 is designated, through which the slip is sucked from a supply (not shown) by the pump 7.
  • a controllable drive is indicated for the here arranged in the interior of the filter cylinder 2, which is not visible and which is described later in more detail.
  • 10 means a bearing housing with devices for feeding the slip to the screw.
  • the screw can be seen at 12, which is surrounded by a fine-pored sintered metal cylinder 13 as a filter medium and, as already indicated in connection with FIG. 1, is driven by the controllable drive 9.
  • the sintered metal cylinder 13 is supported by a pressure-resistant housing 14.
  • a channel system for removing the filtrate in the form of annular grooves 15 and longitudinal grooves 16 can be attached without difficulty and without any significant weakening of the support effect.
  • Grooves 17 preferably provided at intervals in the sintered metal cylinder 13 on the surface facing the screw 12 improve the pressure build-up in the screw channel. These grooves 17 can either be formed directly in the sintered metal cylinder 13 or, as shown in FIG. 4, the sintered metal cylinder is divided into several successive cylinder sections 18.
  • Cylindrical, all-metal cylinder sections 20 provided with grooves 19 are then inserted between these cylinder sections 18, the inside diameter of which is greater than or equal to the inside diameter of the cylinder sections 18 made of sintered metal.
  • a feather key is indicated, which holds the sintered metal cylinder 13 or the succession of sintered metal sections 18 and all-metal sections 20 non-rotatably in the pressure-resistant housing 14, which preferably consists of pressure-resistant steel.
  • annular filter means is indicated, which is held between two cylindrical intermediate rings 23 and 24 and by a support means in the form of a porous support ring 22a, for. B.
  • a screen fabric is supported against the pressure-resistant housing 25.
  • the intermediate rings 23 and 24 are secured in the housing 25 against rotation by means of parallel keys 25a.
  • Tabs 26 sit on the rings 23 and 24, between which a filter cake can build up on the surface of the filter medium ring.
  • the screw 27 can be seen in the embodiment according to FIG. 8.
  • the cylindrical housing here consists of a plurality of cylinder sections 28, 29 and 30 which have flanges 31, 32, 33 and 34. Between these flanges there is in each case an intermediate ring 35, 36, which has an axially projecting collar 37, 38 on the inside on which one end of a screen fabric 40 covering the inner surface of the filter medium 39 is fastened, for example soldered.
  • the other end of this screen fabric 40 is fastened to a projecting collar 41 of an axially displaceable, but secured against rotation insert ring 42, which is accommodated in an annular recess of the adjacent intermediate ring 36.
  • the filter medium 39 for. B.
  • a filter cloth again through a highly porous support ring 45, which is z. B. can be a filter fabric and through which the filtrate flows to the filtrate outlet 44 is supported.
  • sealing rings 46, 47 and 48 are accommodated in corresponding annular grooves in the cylinder sections.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filtration Of Liquid (AREA)

Abstract

Installation pour séparer la partie liquide de la partie solide d'un système liquide finement dispersé, par exemple une barbotine céramique, au moyen d'une hélice (12) entraînée, logée dans un boîtier cylindrique (14) et entourée d'un élément de filtrage (13), d'une conduite de barbotine située à une extrémité du boîtier et d'une étroite sortie de matière solide située dans l'axe de l'hélice à l'autre extrémité du boîtier. L'élément de filtrage (13) est monté dans une enveloppe massive formant le boîtier cylindrique (14) où il est assuré contre la rotation (en 21); cette enveloppe est dotée, sur sa surface tournée vers l'élément de filtrage (13), de plusieurs rainures périphériques écartées (15) qui débouchent sur un conduit de filtrat (5). La surface supérieure de l'élément de filtrage (13) qui est tournée vers l'hélice (12) est recouverte d'un grillage à mailles suffisamment larges (17) résistant à l'abrasion, si bien qu'est formé un canal hélicoïdal plat dans lequel, en raison du mouvement relatif entre l'hélice et le cylindre de l'hélice, la barbotine circule si rapidement que la concentrationde liquide au-dessus de la section transversale du canal hélicoïdal reste approximativement constante et que la barbotine liquide ne peut pas être entraînée par le noyau de l'hélice jusqu'à l'orifice de sortie de presse.

Claims (7)

1. Dispositif pour séparer la partie liquide de la partie solide d'un matériau liquide et finement dispersé et notamment d'une barbotine céramique, comprenant une vis sans fin (12) entraînée et montée dans un logement cylindrique (114), un moyen de filtration (13, 22, 39) entourant la vis sans fin (12) et monté dans le logement (14) en étant fixe en rotation, muni de plusieurs gorges périphériques disposées à distance les unes des autres et débouchant dans une sortie de filtrat (5), avec une amenée de matériau (6,7,8) à une extrémité du logement et une étroite sortie de matières solides à l'autre extrémité du logement et située dans l'axe de la vis sans fin, caractérisé en ce que le moyen de filtration (13, 22, 39) limite avec la vis sans fin (12) un canal de vis sans fin plat et est recouvert sur sa surface qui est tournée vers la vis sans fin (12) par un treillis (17; 24, 26; 40) à mailles suffisamment larges et résistant à un frottement abrasif.
2. Dispositif selon la revendication 1, caractérisé en ce que le logement (14) comprend au niveau de la sortie de matières solides une embouchure dont la section d'ouverture est commandée en fonction de la pression produite à l'extrémité du canal de la vis sans fin par la vis sans fin (12) de manière que cette pression présente une valeur de consigne prédéterminée.
3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que des moyens d'appui (22a, 45) fortement poreux sont disposés sur le côté du moyen de filtration (22, 39) qui est tourné vers le système de canalisations (15, 16) entre le logement cylindrique (14) et le moyen de filtration (22, 39).
4. Dispositif selon la revendication 3, caractérisé en ce que le moyen d'appui fortement poreux est constitué par des anneaux d'appui (22a, 45) en tissu métallique de tamisage.
5. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le treillis est formé par des languettes (26) résistant à un frottement abrasif qui sont montées sur des anneaux intermédiaires (24) fixes en rotation, ou par un tissu métallique de tamisage (40) résistant au frottement abrasif.
6. Dispositif selon la revendication 5, caractérisé en ce que le tissu métallique de tamisage (40) est fixé sur ses côtés frontaux à des collerettes (37,41) d'anneaux intermédiaires (42) qui sont fixes en rotation.
7. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le moyen de filtration est formé par un tissu filtrant (39).
EP84901328A 1983-03-25 1984-03-23 Installation pour separer la partie liquide de la partie solide d'une barbotine ceramique Expired EP0138920B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833311054 DE3311054A1 (de) 1983-03-25 1983-03-25 Vorrichtung zum trennen des fluessiganteils vom feststoffanteil eines keramischen schlickers
DE3311054 1983-03-25

Publications (2)

Publication Number Publication Date
EP0138920A1 EP0138920A1 (fr) 1985-05-02
EP0138920B1 true EP0138920B1 (fr) 1988-06-01

Family

ID=6194743

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84901328A Expired EP0138920B1 (fr) 1983-03-25 1984-03-23 Installation pour separer la partie liquide de la partie solide d'une barbotine ceramique

Country Status (4)

Country Link
US (1) US4624786A (fr)
EP (1) EP0138920B1 (fr)
DE (2) DE3311054A1 (fr)
WO (1) WO1984003660A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0685325B1 (fr) * 1994-05-04 1999-09-01 SCHLEGEL, Dietrich, Dr. Ing. Dispositif pour separer la partie liquide de la partie solide dans des systèmes à deux phases
AUPN221795A0 (en) * 1995-04-07 1995-05-04 Dowmus Pty Ltd Biofilter
DE19944110A1 (de) * 1999-09-15 2001-03-22 Kufferath Andreas Gmbh Verfahren und Mittel zum Entwässern einer Suspension
US20050199267A1 (en) * 2004-03-15 2005-09-15 Oakes Kenton T. Washing system using recycled cleaning liquid
ITMO20120068A1 (it) * 2012-03-15 2013-09-16 R E M S R L Lamina strutturata per la realizzazione di un elemento di supporto per filtri, un elemento di supporto per filtri ed un dispositivo filtrante.
US11484818B2 (en) * 2019-02-11 2022-11-01 North Carolina State University Self-cleaning screen
AT523264B1 (de) * 2020-03-16 2021-07-15 Andritz Ag Maschf Verfahren zur Herstellung eines Siebkörpers sowie Sieb

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE259812C (fr) *
DE195508C (fr) *
US1772262A (en) * 1920-03-31 1930-08-05 John J Naugle Filtering method and means
CH110800A (fr) * 1924-10-07 1925-07-16 William Sizer Albert Machine pour exprimer du liquide de substances telles que des graines oléagineuses ou autres.
NL29087C (fr) * 1927-02-05
FR634303A (fr) * 1927-05-12 1928-02-16 Presse à vis sans fin
US1993214A (en) * 1932-11-21 1935-03-05 Paul O Hass Thickener for pulp stock or the like
CH276136A (de) * 1948-05-24 1951-06-30 Bataafsche Petroleum Verfahren zum Filtrieren von Flüssigkeiten.
FR975518A (fr) * 1948-11-27 1951-03-06 Doulton & Co Ltd Filtre-presse
US2565947A (en) * 1950-10-06 1951-08-28 Burghauser Franz Screw press
FR1126882A (fr) * 1954-07-03 1956-12-03 Traitement des suspensions
US2877903A (en) * 1956-11-29 1959-03-17 Arrow Tools Inc Filter unit
BE578628A (fr) * 1958-05-14
DE1823332U (de) * 1960-06-10 1960-12-15 Uhde Gmbh Friedrich Vorrichtung zum schonenden trennen von schlammigen fluessigkeiten.
US3093579A (en) * 1960-11-23 1963-06-11 Vyzk Ustav Energeticky Separation of solid substances from liquids
DE1219444B (de) * 1960-11-25 1966-06-23 Vyzk Ustav Energetichy Schneckenpresse zur kontinuierlichen Trennung fester und fluessiger Stoffe
NL294351A (fr) * 1962-06-22 1900-01-01
DE1461417A1 (de) * 1963-03-21 1969-04-10 Laeis Werke Ag Filterpresse,besonders fuer keramisches Gut
DE1611150A1 (de) * 1967-08-17 1973-02-01 Bohmter Maschf Kontinuierliche filterpresse mit wandernden filterspalten und selbstreinigung
LU72485A1 (fr) * 1975-05-15 1975-08-28
US4186100A (en) * 1976-12-13 1980-01-29 Mott Lambert H Inertial filter of the porous metal type
DE2837633A1 (de) * 1978-08-29 1980-03-06 Wilhelm Haeberle Trennvorrichtung

Also Published As

Publication number Publication date
WO1984003660A1 (fr) 1984-09-27
EP0138920A1 (fr) 1985-05-02
DE3471604D1 (en) 1988-07-07
DE3311054A1 (de) 1984-09-27
US4624786A (en) 1986-11-25

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