WO1994013383A1 - Self-cleaning filtering device for fluids containing solid particles - Google Patents

Self-cleaning filtering device for fluids containing solid particles Download PDF

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Publication number
WO1994013383A1
WO1994013383A1 PCT/FR1993/001248 FR9301248W WO9413383A1 WO 1994013383 A1 WO1994013383 A1 WO 1994013383A1 FR 9301248 W FR9301248 W FR 9301248W WO 9413383 A1 WO9413383 A1 WO 9413383A1
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WO
WIPO (PCT)
Prior art keywords
edge
self
solid particles
profiles
filter cartridge
Prior art date
Application number
PCT/FR1993/001248
Other languages
French (fr)
Inventor
François LUGUE
Original Assignee
Flurial S.A.
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 Flurial S.A. filed Critical Flurial S.A.
Publication of WO1994013383A1 publication Critical patent/WO1994013383A1/en

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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
    • B30B9/12—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
    • B30B9/121—Screw constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/117—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for outward flow filtration
    • B01D29/118—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for outward flow filtration open-ended
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
    • B01D29/6469—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers
    • B01D29/6476—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers with a rotary movement with respect to the filtering element
    • 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
    • B30B9/128—Vertical or inclined screw presses

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filtration Of Liquid (AREA)

Abstract

Self-cleaning filtering device for fluids containing solid particles, of the type comprising a cylindrical filtration cartridge (12) wherein is arranged a movable assembly (2) of the Archimedes screw type. The external edges of said movable assembly (2) are maintained at a certain distance from the internal wall of said filtration cartridge (12) and the movable assembly (2) comprises, arranged between its turns, angularly positioned vertical profiles (3) so that their leading edge (30) is close to the external edge of said movable assembly (2) and so that their trailing edge is at a certain distance from said external edge.

Description

DISPOSITIF DE FILTRAGE AUTO-NETTOYANT POUR FLUIDES RENFERMANT DES PARTICULES SOLIDES. SELF-CLEANING FILTER DEVICE FOR FLUIDS CONTAINING SOLID PARTICLES.
La présente invention a pour objet un dispositif de filtrage auto-nettoyant notamment destiné au filtrage de fluides renfermant des particules de matières solides, permettant de réaliser le nettoyage en continu des filtres mis en oeuvre, concomitamment à l'opération de filtrage.The subject of the present invention is a self-cleaning filtering device, in particular intended for filtering fluids containing particles of solid matter, making it possible to continuously clean the filters used, concomitantly with the filtering operation.
On connaît déjà des appareils de filtrage auto-nettoyants, mais leur conception s'avère peu appropriée à la filtration de liquides de forte viscosité, convenant presque exclusivement à des fluides qui possèdent une différence de densité importante entre leurs impuretés et leur phase liquide, c'est à dire au cas où les particules se décantent facilement.Self-cleaning filtering devices are already known, but their design proves to be unsuitable for the filtration of liquids of high viscosity, suitable almost exclusively for fluids which have a significant difference in density between their impurities and their liquid phase, c 'is to say in case the particles settle easily.
L'inconvénient majeur inhérent à la mise en oeuvre de ces dispositifs réside dans l'accumulation contre la paroi de la cartouche filtrante de particules solides. Ur.d première solution proposée consiste en la mise en place de gratteurs à racloirs ou à brosses, qui entraînent toutefois l'usure de la cartouche filtrante et sa détérioration partielle, ces racleurs tendant en outre à forcer les impuretés dans les ouvertures de la cartouche filtrante.The major drawback inherent in the implementation of these devices lies in the accumulation against the wall of the filter cartridge of solid particles. Ur.d first proposed solution consists in the installation of scrapers with scrapers or brushes, which however cause the wear of the filter cartridge and its partial deterioration, these scrapers also tend to force the impurities in the openings of the cartridge filtering.
Une autre solution proposée consiste en un décolmatage sans frottement avec le filtre, effectué soit par inversion du sens de circulation du fluide, soit par injection d'un autre liquide dans le sens inverse d'injection du fluide à filtrer, toutefois la mise en oeuvre d'un tel décolmatage nécessite l'interruption du filtrage.Another proposed solution consists in unclogging without friction with the filter, carried out either by reversing the direction of circulation of the fluid, or by injection of another liquid in the opposite direction of injection of the fluid to be filtered, however the implementation such unclogging requires the interruption of filtering.
On a également proposé de réaliser le décolmatage du filtre à l'aide d'un système d'aspiration des particules solides collées sur sa paroi, toutefois la mise en oeuvre d'un tel système entraîne une perte importante du produit à filter, qui est partiellement aspiré en même temps que lesdites particules solides. La présente invention vise à remédier à ces divers inconvénients des systèmes connus en proposant un dispositif permettant d'empêcher les particules solides de s'accumuler sur la paroi de la cartouche filtrante et de les évacuer sans avoir recours à des racloirs et sans interrompre l'opération de filtrage.It has also been proposed to unclog the filter using a suction system for solid particles adhered to its wall, however the implementation of such a system results in a significant loss of the product to be filtered, which is partially aspirated at the same time as said solid particles. The present invention aims to remedy these various drawbacks of known systems by proposing a device making it possible to prevent solid particles from accumulating on the wall of the filter cartridge and to evacuate them without having to use scrapers and without interrupting the filtering operation.
Le dispositif objet de l'invention comporte, comme de nombreux dispositifs connus, une cartouche filtrante cylindrique verticale placée dans une enceinte de récupération du fluide filtré, dans laquelle agit un ensemble mobile, par exemple du type vis d'Archimède simple ou double, mû en rotation axiale par un otoréducteur.The device which is the subject of the invention comprises, like many known devices, a vertical cylindrical filter cartridge placed in an enclosure for recovering the filtered fluid, in which a mobile assembly acts, for example of the simple or double Archimedes screw type, moved in axial rotation by an otoréducteur.
Le dispositif selon l'invention se caractérise essentiellement en ce que les bords extérieurs dudit ensemble mobile sont maintenus à une certaine distance de la paroi interne de la cartouche filtrante, et en ce que ledit ensemble mobile comporte, fixés verticalement, parallèlement à l'axe de la cartouche, entre deux spires consécutives des profils nettoyants sensiblement plats, positionnés angulaire ent par rapport à la paroi intérieure de la cartouche filtrante, de telle manière que leur bord d'attaque soit le plus proche du bord extérieur dudit ensemble mobile. Ainsi, lors de la rotation de l'ensemble mobile, il se crée entre chacun desdits profils et la paroi de la cartouche filtrante, en arrière de leur bord d'attaque, un effet de dépression qui décolle de ladite cartouche filtrante les impuretés solides contenues dans le fluide, ledit effet de dépression étant bien entendu en proportion directe de la vitesse de rotation dudit ensemble mobile.The device according to the invention is essentially characterized in that the outer edges of said mobile assembly are kept at a certain distance from the internal wall of the filter cartridge, and in that said mobile assembly comprises, fixed vertically, parallel to the axis of the cartridge, between two consecutive turns of substantially flat cleaning profiles, positioned angularly with respect to the inner wall of the filter cartridge, so that their leading edge is closest to the outer edge of said movable assembly. Thus, during the rotation of the mobile assembly, it creates between each of said profiles and the wall of the filter cartridge, behind their leading edge, a vacuum effect which takes off from said filter cartridge the solid impurities contained in the fluid, said vacuum effect being of course in direct proportion to the speed of rotation of said mobile assembly.
L'effet de dépression peut être amplifié en donnant au profil nettoyant la forme d'une aile d'avion, permettant d'appliquer les lois hydrodynamiques bien connues de l'homme de l'art, à savoir la création d'un phénomène d'aspiration sur la surface du profil où le fluide parcourt le plus long chemin. Au cours de la rotation de l'ensemble mobile, les profils se trouvant à une certaine distance de la paroi interne de la cartouche filtrante,une dépression locale est générée dans l'espace délimité par leur extrados et la cartouche ayant pour effet d'empêcher les particules de se colmater, lesdites particules étant sont entraînées vers la partie inférieure du filtre où elles peuvent être stockées puis évacuées périodiquement, manuellement ou automatiquement.The depression effect can be amplified by giving the cleaning profile the shape of an airplane wing, making it possible to apply the hydrodynamic laws well known to those skilled in the art, namely the creation of a phenomenon of suction on the surface of the profile where the fluid travels the longest way. During the rotation of the mobile assembly, the profiles being at a certain distance from the internal wall of the filter cartridge, a local vacuum is generated in the space delimited by their upper surface and the cartridge having the effect of preventing the particles from clogging, said particles being entrained towards the lower part of the filter where they can be stored and then removed periodically, manually or automatically.
Il existe deux possibilités de disposition desdits profils en aile d'avion l'un avec le bord d'attaque arrondi l'autre avec le bord d'attaque effilé, mais il s'est avéré avantageux d'opter pour un bord d'attaque effilé, étant donné que dans le cas d'un bord d'attaque arrondi, il se crée sur celui-ci, préalablement au phénomène de dépression sur l'extrados, un phénomène de surpression qui peut nuire au décolmatage en repoussant les impuretés vers la paroi de la cartouche filtrante.There are two possibilities of arrangement of said airplane wing profiles, one with the rounded leading edge and the other with the tapered leading edge, but it has proved advantageous to opt for a leading edge. tapered, given that in the case of a rounded leading edge, it is created thereon, before the phenomenon of depression on the upper surface, a phenomenon of overpressure which can harm unclogging by pushing the impurities towards the wall of the filter cartridge.
Le dispositif selon l'invention, de construction robuste et muni desdits profils, peut autoriser des pressions de travail élevées, nécessaires, par exemple au traitement des pâtes à chocolat.The device according to the invention, of robust construction and provided with said profiles, can allow high working pressures, necessary, for example for the treatment of chocolate pastes.
Les avantages et les caractéristiques de la présente invention ressortiront plus clairement de la description qui suit et qui se rapporte au dessin annexé, lequel en représente un mode de réalisation non limitatif.The advantages and characteristics of the present invention will emerge more clearly from the description which follows and which refers to the appended drawing, which represents a non-limiting embodiment thereof.
Dans le dessin annexé :In the attached drawing:
- la figure 1 représente une vue en coupe longitudinale partielle d'un dispositif de filtrage d'un fluide intégrant un dispositif auto-nettoyant selon l'invention. la figure 2 représente une vue en perspective avec arraché partiel d'une cartouche filtrante et d'un ensemble mobile muni du dispositif auto-nettoyant selon l'invention. - la figure 3 représente une vue en coupe transversale d'un profil du dispositif selon l'invention selon le plan P porté sur la figure 2. Si on se réfère à la figure 1 on peut voir un dispositif de filtrage d'un fluide comportant une enceinte cylindrique 1, connectés en partie supérieure à deux conduits 10 et 11, le conduit 10 d'amenée du fluide débouchant à l'intérieur d'une cartouche filtrante cylindrique 12, et le conduit 11 d'évacuation du fluide débouchant à l'extérieur dans un espace tubulaire 13 ménagé entre l'enceinte 1 et la cartouche filtrante 12.- Figure 1 shows a partial longitudinal sectional view of a fluid filtering device incorporating a self-cleaning device according to the invention. 2 shows a perspective view with partial cutaway of a filter cartridge and a movable assembly provided with the self-cleaning device according to the invention. FIG. 3 represents a cross-sectional view of a profile of the device according to the invention according to the plane P shown in FIG. 2. If we refer to FIG. 1, we can see a device for filtering a fluid comprising a cylindrical enclosure 1, connected in the upper part to two conduits 10 and 11, the conduit 10 for supplying the fluid emerging inside d 'a cylindrical filter cartridge 12, and the duct 11 for evacuating the fluid opening to the outside in a tubular space 13 formed between the enclosure 1 and the filter cartridge 12.
Un ensemble mobile 2, en l'occurrence un arbre 20 porteur d'une vis d'Archimède 21, mû par un motoréducteur 22 extérieur, est positionné dans la cartouche filtrante 12, ses bords extérieurs étant disposés à une certaine distance de la paroi interne de cette dernière. La partie inférieure 14 de l'enceinte 1, en deçà du bord inférieur de la cartouche filtrante 12 est tronconique et sert au stockage des particules contenues dans le fluide.A movable assembly 2, in this case a shaft 20 carrying an Archimedes screw 21, moved by an external gear motor 22, is positioned in the filter cartridge 12, its external edges being arranged at a certain distance from the internal wall of the latter. The lower part 14 of the enclosure 1, below the lower edge of the filter cartridge 12 is frustoconical and is used for the storage of the particles contained in the fluid.
Sur la vis d'Archimède 21 sont solidarisés, entre ses spires, des profils 3 auto-nettoyants verticaux, sensiblement plats et positionnés angulairement de façon leur bord d'attaque 30 soit proche du bord extérieur de la vis d'archimède 21 et que leur bord arrière se rapproche de l'arbre 20. Ainsi le fluide à filtrer est acheminé par le conduit d'amenée 10 et déversé dans la cartouche filtrante 12, puis sous l'action de la rotation de la vis d'Archimède 21 le fluide est comprimé vers la base de la cartouche 12 qui retient les impuretés solides et laisse passer le filtrat qui se répand dans l'espace tubulaire 13 et est évacué par le conduit 11.On the Archimedes 21 screw are joined, between its turns, vertical self-cleaning profiles 3, substantially flat and angularly positioned so their leading edge 30 is close to the outer edge of the Archimedes screw 21 and that their rear edge approaches the shaft 20. Thus the fluid to be filtered is routed through the supply conduit 10 and discharged into the filter cartridge 12, then under the action of the rotation of the Archimedes screw 21 the fluid is compressed towards the base of the cartridge 12 which retains the solid impurities and lets pass the filtrate which spreads in the tubular space 13 and is evacuated by the conduit 11.
Lors de la rotation de la vis d'Archimède 21, il se crée en arrière des profils 3 une dépression qui empêche les impuretés solides de s'agglutiner sur la paroi interne de la cartouche filtrante 12. Ces particules solides sont au fur et à mesure de l'opération drainées vers le bas où elles s'accumulent dans la partie tronconique 14 avant d'être évacuées régulièrement, manuellement ou automatiquement.During the rotation of the Archimedes screw 21, a depression is created behind the profiles 3 which prevents solid impurities from clumping on the internal wall of the filter cartridge 12. These solid particles are gradually of the operation drained down where they accumulate in the part frustoconical 14 before being evacuated regularly, manually or automatically.
Si on se réfère maintenant aux figures 2 et 3 on peut voir que l' ensemble mobile 2 est un hélicoïde 24 relié à l'arbre central 20 par des bras radiaux 25. Cet hélicoïde * 24 comporte également des profils auto¬ nettoyants 30 positionnés de la même manière que les profils 3. Ces profils 30 affectent une forme en aile d'avion, c'est-à-dire avec un extrados 31, un intrados 32, un bord arrondi 33 et un bord effilé 34, de manière à en utiliser les propriétés hydrodynamiques, à savoir la création, lors de la rotation de 1 'hélicoïde 24, en surface de la paroi interne de la cartouche filtrante 12, d'une dépression apte à pouvoir empêcher les particules solides de s'y coller.If we now refer to Figures 2 and 3 we can see that the mobile assembly 2 is a helicoid 24 connected to the central shaft 20 by radial arms 25. This helicoid * 24 also includes self-cleaning profiles 30 positioned the same way as the profiles 3. These profiles 30 have the shape of an airplane wing, that is to say with an upper surface 31, a lower surface 32, a rounded edge 33 and a tapered edge 34, so as to use the hydrodynamic properties, namely the creation, during the rotation of the helicoid 24, on the surface of the internal wall of the filter cartridge 12, of a depression capable of preventing solid particles from sticking to it.
Ces profils 30 sont préférentiellement disposés de manière à ce que le bord d'attaque soit le bord effilé 34, ceci afin d'é-^ ter la création, préalablement à la dépression, d'une surpression au niveau dudit bord d'attaque, phénomène apparaissant dans le cas d'un bord d'attaque arrondi.These profiles 30 are preferably arranged so that the leading edge or the tapered edge 34, in order to e ^ ter creating, prior to depression of an overpressure at said leading edge, phenomenon appearing in the case of a rounded leading edge.
Il est à noter qu'il n'est pas nécessaire que les profils 3 soient épais, une simple tôle cintrée représentant l'extrados, étant suffisante pour créer un effet hydrodynamique.It should be noted that the profiles 3 need not be thick, a simple curved sheet representing the upper surface, being sufficient to create a hydrodynamic effect.
Il va de soi que la présente invention ne saurait être limitée à la description qui précède d'un de ses modes de réalisation, susceptible de subir un certain nombre de modifications sans pour autant sortir du cadre de l'invention. It goes without saying that the present invention cannot be limited to the preceding description of one of its embodiments, capable of undergoing a certain number of modifications without departing from the scope of the invention.

Claims

REVENDICATIONS 1) Dispositif de filtrage auto-nettoyant pour fluides renfermant des particules solides, du type comportant une cartouche filtrante (12) cylindrique dans laquelle est placé un ensemble mobile (2) du type vis d'Archimède, caractérisé en ce que les bords extérieurs dudit ensemble mobile (2) sont maintenus à une certaine distance de la paroi interne de ladite cartouche filtrante (12) et en ce que ledit ensemble mobile ( 2 ) comporte, disposés entre ses spires, des profils verticaux (3) positionnés angulairement, de manière que leur bord d'attaque (30) soit proche du bord extérieur dudit ensemble mobile (2) et que leur bord arrière soit à une certaine distance dudit bord extérieur. 2) Dispositif selon la revendication 1 caractérisé en ce que les profils (3) présentent une forme en aile d'avion avec un extrados et un intrados. CLAIMS 1) Self-cleaning filtering device for fluids containing solid particles, of the type comprising a cylindrical filter cartridge (12) in which is placed a mobile assembly (2) of the Archimedes screw type, characterized in that the outer edges of said mobile assembly (2) are kept at a certain distance from the internal wall of said filter cartridge (12) and in that said mobile assembly (2) comprises, arranged between its turns, vertical profiles (3) angularly positioned, so that their leading edge (30) is close to the outer edge of said movable assembly (2) and that their rear edge is at a certain distance from said outer edge. 2) Device according to claim 1 characterized in that the profiles (3) have an airplane wing shape with an upper surface and a lower surface.
3) Dispositif selon la revendication 1 ou la revendication 2 caractérisé en ce que chaque profil (3) est disposé de manière que son bord d'attaque (30) soit le bord effilé.3) Device according to claim 1 or claim 2 characterized in that each profile (3) is arranged so that its leading edge (30) is the tapered edge.
4) Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce que les profils (3) sont réalisés en tôle cintrée. 4) Device according to any one of the preceding claims, characterized in that the profiles (3) are made of curved sheet metal.
PCT/FR1993/001248 1992-12-14 1993-12-14 Self-cleaning filtering device for fluids containing solid particles WO1994013383A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9215286A FR2699089B1 (en) 1992-12-14 1992-12-14 SELF-CLEANING FILTER DEVICE FOR FLUIDS CONTAINING SOLID PARTICLES.
FR92/15286 1992-12-14

Publications (1)

Publication Number Publication Date
WO1994013383A1 true WO1994013383A1 (en) 1994-06-23

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Application Number Title Priority Date Filing Date
PCT/FR1993/001248 WO1994013383A1 (en) 1992-12-14 1993-12-14 Self-cleaning filtering device for fluids containing solid particles

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FR (1) FR2699089B1 (en)
WO (1) WO1994013383A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016074856A1 (en) * 2014-11-10 2016-05-19 Georg Klass Screw filter press and method for operating a screw filter press
EP3120995A1 (en) * 2015-07-20 2017-01-25 Talleres Mercier, S.A. Double-flighted thread pulp press screws
ITUA20164711A1 (en) * 2016-06-28 2017-12-28 Gogreeen S A S Di Rossi Maurizio SELF-CLEANING FILTER STRUCTURE

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19830412C1 (en) * 1998-07-08 2000-02-03 Edwin Ell Backwashable filter for liquids
US7192989B2 (en) 2002-12-20 2007-03-20 Akzo Nobel N.V. Method and expansion device for preparing expanded thermoplastic microspheres
MXPA05005875A (en) * 2002-12-20 2005-08-29 Akzo Nobel Nv Method and device for pre- expanding thermoplastic microspheres.

Citations (2)

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Publication number Priority date Publication date Assignee Title
SU640859A1 (en) * 1977-01-13 1979-01-05 Всесоюзное Научно-Производственное Объединение Целлюлозо-Бумажной Промышленности Vertical worm-screw press
FR2578441A1 (en) * 1985-03-05 1986-09-12 Assainissement Distr Ste Gle Self-cleaning filter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU640859A1 (en) * 1977-01-13 1979-01-05 Всесоюзное Научно-Производственное Объединение Целлюлозо-Бумажной Промышленности Vertical worm-screw press
FR2578441A1 (en) * 1985-03-05 1986-09-12 Assainissement Distr Ste Gle Self-cleaning filter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section PQ Week B40, 14 November 1979 Derwent World Patents Index; Class P71, AN 73165B *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016074856A1 (en) * 2014-11-10 2016-05-19 Georg Klass Screw filter press and method for operating a screw filter press
EP3120995A1 (en) * 2015-07-20 2017-01-25 Talleres Mercier, S.A. Double-flighted thread pulp press screws
ITUA20164711A1 (en) * 2016-06-28 2017-12-28 Gogreeen S A S Di Rossi Maurizio SELF-CLEANING FILTER STRUCTURE
EP3263206A1 (en) * 2016-06-28 2018-01-03 Gogreeen S.a.s. di Rossi Maurizio Self-cleaning filter

Also Published As

Publication number Publication date
FR2699089A1 (en) 1994-06-17
FR2699089B1 (en) 1995-06-16

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