EP0138920A1 - 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.

Info

Publication number
EP0138920A1
EP0138920A1 EP84901328A EP84901328A EP0138920A1 EP 0138920 A1 EP0138920 A1 EP 0138920A1 EP 84901328 A EP84901328 A EP 84901328A EP 84901328 A EP84901328 A EP 84901328A EP 0138920 A1 EP0138920 A1 EP 0138920A1
Authority
EP
European Patent Office
Prior art keywords
filter
filter medium
housing
screw
solid
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
EP84901328A
Other languages
German (de)
English (en)
Other versions
EP0138920B1 (fr
Inventor
Dietrich Schlegel
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0138920A1 publication Critical patent/EP0138920A1/fr
Application granted granted Critical
Publication of EP0138920B1 publication Critical patent/EP0138920B1/fr
Expired legal-status Critical Current

Links

Classifications

    • 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

  • Such a device is described, for example, in "International Chemical Engineering” (Vol. 18, No. 4) pages 680 to 688 (Japan).
  • the filter cake settling on the filter medium is carried along by a conveyor screw up to the solids discharge.
  • the filter cake slides in the form of a block flow on the filter medium.
  • This filter cake represents a considerable flow resistance for the filtrate drain.
  • the filter medium consists of a perforated cylinder which is surrounded by a hose made of filter cloth.
  • filter cakes build up in the holes of the perforated cylinder, which further increases the flow resistance for the filtrate outflow.
  • the filtrate outflow is therefore comparatively low in this device.
  • the filter hose is not supported from the outside, so that it is not able to absorb higher internal pressures.
  • DE-AS 12 55 084, DE-AS 12 19 444, DE-OS 14 61 417 and in DE-GM document 18 23 332 Other devices of this or similar training are e.g. B described in DE-AS 12 55 084, DE-AS 12 19 444, DE-OS 14 61 417 and in DE-GM document 18 23 332.
  • the object of the invention is to improve such a device in such a way that the build-up of a filter cake on the filter medium is practically completely prevented, so that the filtrate outflow is increased. Furthermore, it should be possible to build up high pressures within the device and thus also be able to increase the concentration of the solid concentrate.
  • the filter medium is secured against rotation to form a flat-cut screw channel in a solid casing forming the cylindrical housing, which on its surface facing the filter medium with a plurality of spaced circumferential grooves is provided, which open into a filtrate discharge and that the surface of the filter medium facing the screw is covered with an abrasion-resistant, sufficiently wide-meshed grid.
  • this grid also improves the delivery effect and the pressure build-up in the screw channel.
  • What is essential for the device according to the invention is a laugh-cut worm channel, in which the ceramic slip or the like is circulated so strongly by the relative movement between the worm and the worm cylinder that the liquid concentration over the worm channel cross-section, at least in the last section of the Mouthpiece is approximately constant and the liquid slip cannot penetrate through the screw core to the mouthpiece.
  • Such a device also has the advantage that it is possible to use high feed pressures for the slip and to build up high pressures due to the screw rotating within the filter medium cylinder.
  • the filter medium forming the thickness of the screw channel is additionally supported by the cylindrical housing consisting of a solid jacket.
  • the corresponding discharge grooves or channels for the filtrate can be accommodated in the jacket without difficulty and without a substantial weakening of the support effect.
  • the filter medium can additionally support, strongly porous solids, such as, for. B. screen fabric, which oppose the filtrate flow only little resistance.
  • a fine-pored sintered metal cylinder is used as the filter medium, it is possible to provide interrupted grooves, preferably at intervals, in the surface of the sintered metal facing the screw. These grooves take the place of the above-mentioned, wide-meshed grid arranged on the filter medium surface and also improve the pressure build-up in the screw channel. she
  • REPLACEMENT SHEET / ⁇ jü can either be formed directly in this sintered metal cylinder or, in a further development of the invention, the sintered metal cylinder is subdivided into a plurality of successive cylinder sections, between which cylindrical all-metal cylinder sections provided with hats are provided, the inside diameter of which is greater than or equal to the inside diameter of the sintered metal cylinder sections is.
  • the housing cylinder preferably has a mouthpiece on the solids discharge, the opening cross section of which is regulated 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 setpoint with only slight fluctuations points.
  • OMPI Pressure is easier to measure than the humidity and is therefore suitable as a control variable for the opening cross-section of the mouthpiece.
  • the abrasion on the filter medium even if it is a relatively abrasion-resistant sintered metal, can be very high, it may be appropriate to allow a filter cake to rest on the filter medium relative to the filter medium. It has been shown that in some cases, especially in the area of the mouthpiece, where the largely drained plastic material rubs over the filter medium under high pressure of, for example, 40 to 80 bar, the pores on the surface are largely emery closed we can.
  • the abrasion-resistant grid covering the filter medium surface form a thin as possible, but on the
  • the expedient sintered metal cylinder forming the filter medium should consist of several successive cylinder sections, between which cylindrical all-metal sections, secured against rotation, are arranged, on the inside of which tabs are attached which protrude beyond the surface of the filter medium.
  • the result is an abrasion-resistant, sufficiently wide-meshed grid directly on the filter medium surface, in the meshes of which are at rest relative to the filter medium, the cake resting relative to the filter medium can form.
  • the thickness of the cake ie the thickness of these protruding flaps must of course be as small as possible so as not to unnecessarily impede the filtrate drain.
  • the filter means is only of minor importance.
  • the filter medium can made of sintered metal, porous plastic or a simple hose made of filter cloth and others.
  • the cylindrical housing be constructed from a plurality of cylindrical ring sections, between each of which an intermediate ring is arranged, which on the inside, ie on the side facing the screw, has an axially projecting collar on the one side, to the one end of a sieve cloth covering the inner surface of the filter medium is fastened, the other end of which is fastened to a projecting collar of an axially displaceable but secured against rotation insert ring, which is accommodated in a ring recess of the adjacent intermediate ring.
  • This filter fabric has the same purpose as the wide-meshed grid described above, namely to increase the conveying action of the screw and to build up a resting filter cake layer on the filter medium.
  • the prior art also includes a disc filter according to "Filtration and Separation" September / October 1977, pages 455 to 458.
  • the slip is also introduced under pressure into a space surrounded by a filter medium, the liquid portion is pressed out through the filter medium and the Solids content retained in the space surrounded by the filter medium, conveyed in the direction of flow of the slip and discharged from the latter at the end of the space.
  • the retained solids content which is deposited on the filter medium is not completely removed after the deposition, but remains partly on the filter medium because it is intended to support the filtration process.
  • webs are arranged on circumferential disks, which partially remove the filter cake.
  • the concentrated material will slide on the smooth surface of the filter medium, which is not covered by a grid, whereby at least in the case of abrasive, e.g. B. ceramic materials strong abrasion can occur on the filter medium surface.
  • abrasive e.g. B. ceramic materials strong abrasion can occur on the filter medium surface.
  • the conveying effect of the spirally arranged webs on the rotating disk is comparatively low.
  • pressure is continuously reduced again during the transition from one chamber to the other, so that pressures and solids concentrations, as can be achieved in a screw filter press, are not to be expected.
  • OMPI arranged resting cylinders, both of which are covered with filter medium. Dynamic forces form at the boundary layers of the movement of the two cylinders into one another, which lead to a vortex-shaped circulating flow and to a continuous removal of the filter cake. Since the pressure in the flow channel continuously decreases, it is not possible to reach high pressures which alone guarantee a high concentration of the concentrate.
  • Figure 1 shows the device in side view.
  • Fig. 2 shows a partial longitudinal section through the
  • Fig. 3 is a section along III-III of Fig. 2;
  • FIG. 6 shows a partial longitudinal section through a modified embodiment of a press cylinder
  • Fig. 7 is a section along the line VII-VII of Fig. 6;
  • Section of Figure 6 of another modified embodiment. 1 shows the device for separating the liquid portion from the solid portion of a finely dispersed liquid system, e.g. B. 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. In part 4, the adjusting device is provided for the opening cross section of the solids discharge. 3a indicates a pressure transmitter for measuring the final pressure in the screw channel. The liquid portion outflow is provided at 5.
  • the slip is fed under pressure into the filter cylinder 2 by a pump 7, preferably a membrane pump. 8 designates the suction line of the pump 7, via which the slip is sucked in by the pump 7 from a supply (not shown).
  • a controllable drive is indicated for the here arranged in the interior of the filter cylinder 2, which is not visible and is described later by means of a worm. 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 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.
  • this housing 14 there can be removal grooves for the filtrate in the form of ring grooves 15 and longitudinal grooves 16 without difficulty and without any significant weakening of the support effect
  • 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 a plurality of 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.
  • Indicated at 21 is a feather key which non-rotatably holds the sintered metal cylinder 13 or the sequence of sintered metal sections 18 and all-metal sections 20 in the pressure-resistant housing 14, which preferably consists of pressure-resistant steel.
  • FIG. 6, 22 denotes a filter medium ring which is held between two cylinder sections 23 and 24 and is formed by a porous support ring 22a, e.g. a screen fabric against which pressure-resistant housing 25 is supported.
  • the annular cylinder sections 23 and 24 are secured in the housing 25 against rotation by means of parallel keys 25a.
  • the cylindrical housing here consists of several cylindrical ring sections 28, 29 and 30 which have flanges 31, 32, 33 and 34. Between these flanges
  • OMPI there is in each case an intermediate ring 35, 36 which has an axially projecting collar 37, 38 on the inside on one side, to which one end of a screen fabric 40 covering the inner surface of the filter medium 39 is fastened, for example soldered on .
  • 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 a ring recess of the adjacent intermediate ring 36.
  • the filter medium 39 for example a filter cloth
  • a highly porous support ring 45 which can be a filter fabric, for example, and through which the filtrate flows into the filtrate outlet 44.
  • sealing rings 46, 47 and 48 which are accommodated in corresponding annular grooves in the cylinder sections.

Landscapes

  • 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.
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
DE3311054 1983-03-25
DE19833311054 DE3311054A1 (de) 1983-03-25 1983-03-25 Vorrichtung zum trennen des fluessiganteils vom feststoffanteil eines keramischen schlickers

Publications (2)

Publication Number Publication Date
EP0138920A1 true EP0138920A1 (fr) 1985-05-02
EP0138920B1 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
DE195508C (fr) *
DE259812C (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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8403660A1 *

Also Published As

Publication number Publication date
US4624786A (en) 1986-11-25
WO1984003660A1 (fr) 1984-09-27
EP0138920B1 (fr) 1988-06-01
DE3311054A1 (de) 1984-09-27
DE3471604D1 (en) 1988-07-07

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