FR2699089A1 - Self-cleaning filtering device for fluids containing solid particles. - Google Patents
Self-cleaning filtering device for fluids containing solid particles. Download PDFInfo
- Publication number
- FR2699089A1 FR2699089A1 FR9215286A FR9215286A FR2699089A1 FR 2699089 A1 FR2699089 A1 FR 2699089A1 FR 9215286 A FR9215286 A FR 9215286A FR 9215286 A FR9215286 A FR 9215286A FR 2699089 A1 FR2699089 A1 FR 2699089A1
- Authority
- FR
- France
- Prior art keywords
- filter cartridge
- edge
- self
- profiles
- solid particles
- 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
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 17
- 239000002245 particle Substances 0.000 title claims abstract description 14
- 238000001914 filtration Methods 0.000 title claims abstract description 13
- 239000007787 solid Substances 0.000 title claims abstract description 13
- 238000004140 cleaning Methods 0.000 title claims abstract description 12
- 239000002184 metal Substances 0.000 claims 1
- 239000012535 impurity Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 235000019219 chocolate Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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
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. Les bords extérieurs dudit ensemble mobile (2) sont maintenus à une certaine distance de la paroi interne de ladite cartouche filtrante (12) et 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.Self-cleaning filtering device for fluids containing solid particles, of the type comprising a cylindrical filter cartridge (12) in which is placed a movable assembly (2) of the Archimedean screw type. The outer edges of said movable assembly (2) are kept at a certain distance from the inner wall of said filter cartridge (12) and said movable assembly (2) comprises, arranged between its turns, vertical profiles (3) positioned angularly, of 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.
Description
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 for filtering fluids containing particles of solids, making it possible to carry out the continuous cleaning of the filters used, concomitantly with the filtering operation.
On connaît déjà des appareils de filtrage autonettoyants, mais leur conception 5r 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, crest à dire au cas où les particules se décantent facilement. Self-cleaning filtering devices are already known, but their 5r design is not very suitable for the filtration of liquids of high viscosity, suitable almost exclusively for fluids which have a difference in density between their impurities and their liquid phase, ie case where 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. The major disadvantage inherent in the implementation of these devices lies in the accumulation against the wall of the filter cartridge of solid particles.
Une 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. A first proposed solution consists of the establishment of scrapers scrapers or brushes, which however cause wear of the filter cartridge and its partial deterioration, these scrapers tending to further force impurities in the openings of the filter cartridge.
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 drinjectjon du fluide à filtrer, toutefois la mise en oeuvre d'un tel décolmatage nécéssite l'interruption du filtrage. Another solution proposed consists of a decolouring without friction with the filter, carried out either by inversion of the direction of circulation of the fluid, or by injection of another liquid in the opposite direction injection of the fluid to be filtered, however the implementation of such declogging requires the interruption of the 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. It has also been proposed to carry out the unclogging of the filter by means of a suction system for solid particles bonded to its wall, however the implementation of such a system results in a significant loss of the filter product, which is partially sucked at the same time as said solid particles.
La présente invention vise à remédier à ces divers inconvénients des sytèmes 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. The present invention aims to remedy these various disadvantages of known systems by proposing a device for preventing the solid particles from accumulating on the wall of the filter cartridge and to evacuate them without resorting to 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 motoréducteur. The device according to the invention comprises, like many known devices, a vertical cylindrical filter cartridge placed in a filtered fluid recovery chamber, in which a moving assembly operates, for example of the single or double Archimedean screw type, in axial rotation by a geared motor.
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 angulairement 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. The device according to the invention is essentially characterized in that the outer edges of said moving assembly are maintained at a distance from the inner wall of the filter cartridge, and in that said movable assembly comprises, fixed vertically, parallel to the axis. the cartridge, between two consecutive turns 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 moving assembly.
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. Thus, during the rotation of the moving assembly, there is created 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 depression effect being of course in direct proportion to the rotational speed of said moving 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 1'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 effect of depression 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 an airfoil phenomenon. suction on the surface of the profile where the fluid travels the longest path. During the rotation of the moving assembly, the profiles being at a distance from the inner wall of the filter cartridge, a local depression is generated in the space delimited by their extrados and the cartridge has the effect of preventing particles to clog, said particles being are driven to 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 for disposing said airfoil profiles, one with the rounded leading edge the other with the tapered leading edge, but it has proven advantageous to opt for a leading edge. tapered, because in the case of a rounded leading edge, it is created on it, prior to the phenomenon of depression on the upper surface, a phenomenon of overpressure which can affect the declogging 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 in 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
- la figure 1 représente une vue en coupe longitudinale partielle drun dispositif de filtrage d'un fluide intégrant un dispositif auto-nettoyant selon l'invention.In the attached drawing
- Figure 1 shows a partial longitudinal sectional view of a filtering device of a fluid incorporating a self-cleaning device according to the 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. - Figure 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.
- 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. 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.
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 Il d'évacuation du fluide débouchant à l'extérieur dans un espace tubulaire 13 ménagé entre l'enceinte 1 et la cartouche filtrante 12. With reference to FIG. 1, a filtering device for a fluid comprising a cylindrical enclosure 1, connected at the top to two ducts 10 and 11, can be seen, the conduit 10 for supplying the fluid opening into the interior of the chamber. a cylindrical filter cartridge 12, and the conduit 11 for discharging the fluid opening out into a tubular space 13 formed between the chamber 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. A moving assembly 2, in this case a shaft 20 carrying an Archimedean screw 21, driven by an external geared motor 22, is positioned in the filter cartridge 12, its outer edges being arranged at a certain distance from the inner wall. of the latter.
La partie inférieure 14 de l'enceinte 1, en deça du bord inférieur de la cartouche filtrante 12 est tronconique et sert au stockage des particules contenues dans le fluide. The lower part 14 of the chamber 1, below the lower edge of the filter cartridge 12 is frustoconical and serves to store 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. On the Archimedean screw 21 are secured, between its turns, vertical self-cleaning profiles 3, substantially flat and positioned angularly so that their leading edge 30 is close to the outer edge of the archimedean screw 21 and that their rear edge is getting closer to the shaft 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. Thus the fluid to be filtered is conveyed by the supply duct 10 and discharged into the filter cartridge 12, then under the action of the rotation of the Archimedean screw 21 the fluid is compressed towards the base of the cartridge 12 which holds the solid impurities and passes the filtrate which spreads in the tubular space 13 and is discharged through 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 Archimedean screw 21, behind the profiles 3 is created a depression which prevents the solid impurities from clumping on the inner wall of the filter cartridge 12. These solid particles are progressively the operation drained down where they accumulate in the frustoconical portion 14 before being discharged regularly, manually or automatically.
Si on se réfère maintenant aux figures 2 et 3 on peut voir que 1' ensemble mobile 2 est un hélicoïde 24 relié à l'arbre central 20 par des bras radiaux 25. Cet hélicoide 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, ctest-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 l'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. Referring now to FIGS. 2 and 3, it can be seen that the moving 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 in the same as the profiles 3. These profiles 30 affect an airfoil shape, 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 properties hydrodynamic, namely the creation, during the rotation of the helicoid 24, the surface of the inner wall of the filter cartridge 12, a depression capable of preventing the solid particles to stick 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'éviter la création, préalablement à la dépression, d'une surpression au niveau dudit bord d'attaque, phénomène apparaissant dans le cas dfun bord d'attaque arrondi. These profiles 30 are preferably arranged in such a way that the leading edge is the tapered edge 34, this in order to avoid the creation, prior to the depression, of an overpressure at said leading edge, a phenomenon occurring 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 tale cintrée représentant l'extrados, étant suffisante pour créer un effet hydrodynamique. It should be noted that it is not necessary that the profiles 3 be thick, a simple curved tale representing the extrados, 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 can not be limited to the foregoing description of one of its embodiments, capable of undergoing a number of modifications without departing from the scope of the invention.
Claims (4)
Priority Applications (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. |
| PCT/FR1993/001248 WO1994013383A1 (en) | 1992-12-14 | 1993-12-14 | Self-cleaning filtering device for fluids containing solid particles |
Applications Claiming Priority (1)
| 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. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2699089A1 true FR2699089A1 (en) | 1994-06-17 |
| FR2699089B1 FR2699089B1 (en) | 1995-06-16 |
Family
ID=9436763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9215286A Expired - Fee Related FR2699089B1 (en) | 1992-12-14 | 1992-12-14 | SELF-CLEANING FILTER DEVICE FOR FLUIDS CONTAINING SOLID PARTICLES. |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR2699089B1 (en) |
| WO (1) | WO1994013383A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0970736A2 (en) * | 1998-07-08 | 2000-01-12 | EWT Wassertechnik GmbH | Back-flushable filter for liquids |
| WO2004056549A1 (en) * | 2002-12-20 | 2004-07-08 | Akzo Nobel N.V. | Method and device for pre- expanding thermoplastic microspheres |
| US7192989B2 (en) | 2002-12-20 | 2007-03-20 | Akzo Nobel N.V. | Method and expansion device for preparing expanded thermoplastic microspheres |
Families Citing this family (3)
| 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 |
| ES2551254B2 (en) * | 2015-07-20 | 2016-03-22 | Talleres Mercier, S.A. | Pulp press propellers with double turns |
| ITUA20164711A1 (en) * | 2016-06-28 | 2017-12-28 | Gogreeen S A S Di Rossi Maurizio | SELF-CLEANING FILTER STRUCTURE |
Citations (2)
| 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 |
-
1992
- 1992-12-14 FR FR9215286A patent/FR2699089B1/en not_active Expired - Fee Related
-
1993
- 1993-12-14 WO PCT/FR1993/001248 patent/WO1994013383A1/en active Application Filing
Patent Citations (2)
| 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)
| Title |
|---|
| SOVIET PATENTS ABSTRACTS Week 40, 14 Novembre 1979 Derwent Publications Ltd., London, GB; AN 73165B/40 & SU-A-640 859 (CELLULOSE PAPER IND RES) 13 Janvier 1977 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0970736A2 (en) * | 1998-07-08 | 2000-01-12 | EWT Wassertechnik GmbH | Back-flushable filter for liquids |
| EP0970736A3 (en) * | 1998-07-08 | 2000-12-13 | EWT Wassertechnik GmbH | Back-flushable filter for liquids |
| WO2004056549A1 (en) * | 2002-12-20 | 2004-07-08 | Akzo Nobel N.V. | Method and device for pre- expanding thermoplastic microspheres |
| US7192989B2 (en) | 2002-12-20 | 2007-03-20 | Akzo Nobel N.V. | Method and expansion device for preparing expanded thermoplastic microspheres |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1994013383A1 (en) | 1994-06-23 |
| FR2699089B1 (en) | 1995-06-16 |
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