FR2773083A1 - Lamellar separator having textured plates and used for removal of solids and hydrocarbons from water - Google Patents
Lamellar separator having textured plates and used for removal of solids and hydrocarbons from water Download PDFInfo
- Publication number
- FR2773083A1 FR2773083A1 FR9716789A FR9716789A FR2773083A1 FR 2773083 A1 FR2773083 A1 FR 2773083A1 FR 9716789 A FR9716789 A FR 9716789A FR 9716789 A FR9716789 A FR 9716789A FR 2773083 A1 FR2773083 A1 FR 2773083A1
- Authority
- FR
- France
- Prior art keywords
- lamellar
- embossing
- plate according
- lamellar plate
- plates
- 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
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/0208—Separation of non-miscible liquids by sedimentation
- B01D17/0211—Separation of non-miscible liquids by sedimentation with baffles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/0003—Making of sedimentation devices, structural details thereof, e.g. prefabricated parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/0006—Settling tanks provided with means for cleaning and maintenance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/0024—Inlets or outlets provided with regulating devices, e.g. valves, flaps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/0039—Settling tanks provided with contact surfaces, e.g. baffles, particles
- B01D21/0045—Plurality of essentially parallel plates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/0039—Settling tanks provided with contact surfaces, e.g. baffles, particles
- B01D21/006—Settling tanks provided with contact surfaces, e.g. baffles, particles with co-current flow direction of liquid and solid particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/0039—Settling tanks provided with contact surfaces, e.g. baffles, particles
- B01D21/0069—Making of contact surfaces, structural details, materials therefor
- B01D21/0072—Means for adjusting, moving or controlling the position or inclination of the contact surfaces, e.g. for optimising the particle-liquid separation, for removing the settled particles, for preventing fouling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/10—Settling tanks with multiple outlets for the separated liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/24—Feed or discharge mechanisms for settling tanks
- B01D21/2405—Feed mechanisms for settling tanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/24—Feed or discharge mechanisms for settling tanks
- B01D21/2444—Discharge mechanisms for the classified liquid
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/001—Runoff or storm water
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Analytical Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
Abstract
Description
"Plaque lamellaire de décantation particulaire et de séparation de gouttelettes de
liquides légers pour la dépollution des eaux pluviales et industrielles et installation de
décantation la comprenant"
L'invention se rapporte à une plaque lamellaire de décantation particulaire et de séparation de gouttelettes de liquides légers pour la dépollution des eaux pluviales et industrielles. L'invention conceme également une installation de décantation comprenant cette nouvelle plaque lamellaire de décantation."Lamellar plate for particulate settling and separation of droplets
light liquids for the depollution of rain and industrial waters and installation of
settling including it "
The invention relates to a lamellar plate for particulate settling and separation of droplets of light liquids for the depollution of rain and industrial water. The invention also relates to a settling installation comprising this new lamellar settling plate.
Les eaux pluviales charrient des hydrocarbures provenant notamment des rejets des véhicules automobiles et des particules grenues, des sables, contenant des métaux lourds et piègent les hydrocarbures. Rainwater carries hydrocarbons coming notably from the discharges of motor vehicles and grainy particles, sands, containing heavy metals and traps hydrocarbons.
Les métaux lourds principalement, le plomb, le cuivre, le zinc et le cadmium, sont générés essentiellement par les véhicules automobiles qui circulent sur les routes et par le mobilier urbain. A titre d'exemple, la circulation de 10 000 véhicules par jour génère une pollution de 80 à 140 gljlkm pour le plomb et 40 g/j/km pour le zinc. Heavy metals mainly, lead, copper, zinc and cadmium, are mainly generated by motor vehicles on the roads and by street furniture. For example, the circulation of 10,000 vehicles per day generates pollution of 80 to 140 gljlkm for lead and 40 g / d / km for zinc.
Les décanteurs utilisés actuellement font appel à des plaques lamellaires. Decanters currently used use lamellar plates.
La décantation des particules grenues est effectuée à la partie inférieure des plaques lamellaires, tandis que la décantation des liquides légers est effectuée à la partie supérieure des plaques. The settling of grainy particles is carried out at the bottom of the lamellar plates, while the settling of light liquids is carried out at the top of the plates.
Les décanteurs utilisés actuellement sont satisfaisants mais leur efficacité peut être améliorée en ce qui conceme les liquides légers. The decanters currently used are satisfactory but their efficiency can be improved with regard to light liquids.
L'invention fournit un décanteur comprenant de nouvelles plaques lamellaires susceptible de séparer à la fois les liquides légers et les particules grenues. The invention provides a decanter comprising new lamellar plates capable of separating both light liquids and grainy particles.
La nouvelle plaque lamellaire de l'invention comporte deux parois frontales parallèles, au moins une paroi intermédiaire placée entre lesdites parois frontales et parallèle à celles-ci, lesdites au moins trois parois étant reliées entre elles par des cloisons transversales, dont deux latérales, sensiblement perpendiculaires à celles-ci, définissant des canaux parallèles s'étendant longitudinalement, chacun desdits canaux comportant intérieurement sur sa face parallèle auxdites parois frontales un gaufrage, en sorte que deux canaux contigus superposés aient leur gaufrage dirigé du même côté, ledit gaufrage faisant ainsi dans chaque canal face à une surface lisse, le gaufrage définissant tout état de surface permettant d'augmenter ladite surface. The new lamellar plate of the invention has two parallel front walls, at least one intermediate wall placed between said front walls and parallel to them, said at least three walls being interconnected by transverse partitions, two of which are lateral, substantially perpendicular thereto, defining parallel channels extending longitudinally, each of said channels internally having on its face parallel to said front walls an embossing, so that two adjacent superimposed channels have their embossing directed on the same side, said embossing thus doing in each channel facing a smooth surface, the embossing defining any surface condition making it possible to increase said surface.
Le gaufrage peut consister en des stries, des créneaux, des ondulations, des picots ou des peignes. Embossing can consist of ridges, slots, ripples, dots or combs.
Le gaufrage peut aussi être obtenu en augmentant la surface par tout moyen approprié, par exemple, par projection de grains collés ou par un processus de réaction chimique. Embossing can also be achieved by increasing the surface by any suitable means, for example, by spraying glued grains or by a chemical reaction process.
La surface inférieure des plaques lamellaires est plane. The lower surface of the lamellar plates is flat.
Une lamelle est constituée de canaux, les lamelles assemblées entre elles sur la largeur forment les plaques lamellaires, et les plaques lamellaires assemblées entre elles forment des blocs lamellaires. A lamella is made up of channels, the lamellae assembled together across the width form the lamellar plates, and the lamellar plates assembled together form lamellar blocks.
Afin d'obtenir, durant le fonctionnement du séparateur, un régime laminaire, chaque plaque lamellaire comporte des cloisons qui lui sont perpendiculaires, formant ainsi des canaux. Ceci permet, pour un même débit et une même section, de réduire le nombre de Reynolds et de rester ainsi en régime laminaire. In order to obtain, during the operation of the separator, a laminar regime, each lamellar plate has partitions which are perpendicular thereto, thus forming channels. This allows, for the same flow rate and the same section, to reduce the Reynolds number and thus remain in laminar regime.
Les plaques lamellaires peuvent être assemblées entre elles par clipsage à différents endroits soit aux extrémités de la plaque, soit à certaines parois des canaux, soit à toutes, par exemple sur deux axes par des éléments d'accrochage, comme des systèmes de clips. The lamellar plates can be assembled together by clipping at different locations either at the ends of the plate, or at certain walls of the channels, or at all, for example on two axes by hooking elements, such as clip systems.
Sur la largeur des plaques lamellaires les clips sont rigides, alors que sur la longueur des plaques lamellaires les clips sont avec du jeu. On the width of the lamellar plates the clips are rigid, while on the length of the lamellar plates the clips are with play.
Les clips avec du jeu sur la longueur permettent d'assembler plusieurs plaques lamellaires entre elles et ainsi de ramener les plaques lamellaires d'une position inclinée à une position verticale, ce qui facilite le nettoyage des plaques lamellaires. The clips with play on the length make it possible to assemble several lamellar plates together and thus to bring the lamellar plates from an inclined position to a vertical position, which facilitates the cleaning of the lamellar plates.
Le clipsage peut se faire verticalement en faisant glisser deux longueurs de lamelles l'une dans l'autre ou horizontalement par pression. Clipping can be done vertically by sliding two lengths of slats into each other or horizontally by pressure.
Les lamelles sont de longueur variable selon la taille de l'installation. Elles ont par exemple une longueur de 0,5 à 2 m. Leur largeur est d'environ 0,5 m. The slats vary in length depending on the size of the installation. They have, for example, a length of 0.5 to 2 m. Their width is about 0.5 m.
Les sections des canaux forment sensiblement des carrés dont les côtés ont une longueur d'environ 20 à 25 mm. The sections of the channels substantially form squares whose sides have a length of about 20 to 25 mm.
Les clips avec du jeu sur la longueur permettent d'assembler plusieurs lamelles entre elles. The clips with play on the length make it possible to assemble several strips together.
Le matériau constituant les plaques selon l'invention est par exemple une matière plastique appropriée, telle que du PVC. The material constituting the plates according to the invention is for example an appropriate plastic material, such as PVC.
Dans une installation de dépollution, les plaques lamellaires selon l'invention peuvent être inclinées ou "tête-bêche". In a depollution installation, the lamellar plates according to the invention can be inclined or "head to tail".
Les eaux à dépolluer entrent par le dessus des blocs lamellaires, ceux-ci étant inclinés dans le sens du courant pour éviter le passage du régime laminaire au régime turbulent, elles ressortent par le dessous des blocs lamellaires et se dirigent vers une canalisation de sortie. The water to be decontaminated enters from above the lamellar blocks, these being inclined in the direction of the current to avoid the transition from the laminar regime to the turbulent regime, they emerge from below the lamellar blocks and go towards an outlet pipe.
La section et le nombre de canaux permettent d'obtenir un nombre de Reynolds favorisant le régime laminaire. The section and the number of channels make it possible to obtain a Reynolds number favoring the laminar regime.
La surface projetée choisie d'échange permet de vérifier le diamètre de particule piégée (liquide léger ou particule grenue) en fonction de la vitesse de séparation et de décantation. The projected projected exchange surface makes it possible to check the diameter of trapped particle (light liquid or grainy particle) as a function of the speed of separation and decantation.
L'invention sera à présent décrite plus en détail en référence aux Figures annexées dans lesquelles:
- la Figure 1 est une vue en perspective d'une plaque lamellaire selon l'invention;
- la Figure 2 est une vue en bout d'un assemblage de quatre plaques lamellaires selon l'invention;
- la Figure 3 est une vue agrandie d'un détail de la Figure 2;
- les Figures 4, 5, 6 et 7 sont chacune une vue agrandie d'une partie de paroi comportant un gaufrage selon l'invention;
- la Figure 8 est une vue schématique de plaques lamellaires selon l'invention en cours de fonctionnement;
- la Figure 9 est une vue schématique d'une installation de décantation comportant des plaques lamellaires selon l'invention;
- la Figure 10 est une vue agrandie d'un détail de la Figure 9 montrant le pivotement des lamelles;
- la Figure 11 est une section de l'installation de la Figure 9;
- les Figures 12 et 13 sont des vues schématiques montrant diverses possibilités de disposition des plaques lamellaires de l'invention dans une installation.The invention will now be described in more detail with reference to the attached Figures in which:
- Figure 1 is a perspective view of a lamellar plate according to the invention;
- Figure 2 is an end view of an assembly of four lamellar plates according to the invention;
- Figure 3 is an enlarged view of a detail of Figure 2;
- Figures 4, 5, 6 and 7 are each an enlarged view of a wall portion having an embossing according to the invention;
- Figure 8 is a schematic view of lamellar plates according to the invention during operation;
- Figure 9 is a schematic view of a settling installation comprising lamellar plates according to the invention;
- Figure 10 is an enlarged view of a detail of Figure 9 showing the pivoting of the slats;
- Figure 11 is a section of the installation of Figure 9;
- Figures 12 and 13 are schematic views showing various possibilities of arrangement of the lamellar plates of the invention in an installation.
Les lamelles 2 assemblées entre elles sur la largeur forment les plaques lamellaires 1, et les plaques lamellaires assemblées entre elles forment des blocs lamellaires ou modules de séparation 15. The lamellae 2 assembled together over the width form the lamellar plates 1, and the lamellar plates assembled together form lamellar blocks or separation modules 15.
La plaque lamellaire 1 de l'invention comporte deux parois frontales parallèles 3 et 3', une paroi intermédiaire 4 placée entre les parois frontales et parallèle à celles-ci, ces trois parois étant reliées entre elles par des cloisons transversales 5, dont deux latérales 5', sensiblement perpendiculaires à celles-ci, définissant des canaux 6 parallèles s'étendant longitudinalement, chacun desdits canaux comportant intérieurement sur sa face parallèle auxdites parois frontales un gaufrage 7 en sorte que deux canaux contigus superposés aient leur gaufrage dirigé du même côté, ledit gaufrage faisant ainsi dans chaque canal face à une surface lisse 8. The lamellar plate 1 of the invention has two parallel front walls 3 and 3 ', an intermediate wall 4 placed between the front walls and parallel to them, these three walls being connected to each other by transverse partitions 5, two of which are lateral 5 ′, substantially perpendicular thereto, defining parallel channels 6 extending longitudinally, each of said channels internally having on its face parallel to said front walls an embossing 7 so that two contiguous superimposed channels have their embossing directed on the same side, said embossing thus making in each channel facing a smooth surface 8.
Le gaufrage peut consister en des stries 9 (Figure 4), des créneaux 10 (Figure 5), des ondulations Il (Figure 6), des picots 12 (Figure 7), ou des peignes. The embossing may consist of ridges 9 (Figure 4), slots 10 (Figure 5), corrugations II (Figure 6), pins 12 (Figure 7), or combs.
Les plaques lamellaires sont assemblées entre elles par des systèmes de clips 13, 13', 14,14'. The lamellar plates are joined together by clip systems 13, 13 ', 14.14'.
Sur la largeur des plaques lamellaires les clips 14, 14' sont rigides, alors que sur la longueur des plaques lamellaires les clips 13,13' sont avec du jeu. On the width of the lamellar plates the clips 14, 14 'are rigid, while on the length of the lamellar plates the clips 13,13' are with play.
Dans la Figure 8, I'eau à épurer, chargée de liquides légers, par exemple des hydrocarbures (HC), et des particules grenues, par exemple des boues, arrive en 16 dans un module de séparation 15 contenant les plaques lamellaires 1 et 1'. Les boues sortent par la partie inférieure en 17 alors que les hydrocarbures HC sont absorbés par coalescence sur les surfaces comportant un gaufrage 7 et 7', remontent suivant F et F' et flottent à la surface en 18. L'eau épurée est recueillie en 19. In FIG. 8, the water to be purified, loaded with light liquids, for example hydrocarbons (HC), and grainy particles, for example sludge, arrives at 16 in a separation module 15 containing the lamellar plates 1 and 1 '. The sludge exits from the lower part at 17 while the HC hydrocarbons are absorbed by coalescence on the surfaces having an embossing 7 and 7 ′, rise again along F and F ′ and float on the surface at 18. The purified water is collected in 19.
Le schéma de principe de l'installation de dépollution est représenté sur la
Figure 9.The schematic diagram of the depollution installation is shown on the
Figure 9.
Les eaux polluées, contenant des hydrocarbures et des particules grenues rentrent par 22 dans l'installation de dépollution 20 comprenant les plaques lamellaires 1 formant des blocs lamellaires 14 et un flotteur 21. Elles se dirigent selon les flèches F1 par le dessus des blocs lamellaires 14. Les boues de particules grenues sortent suivant les flèches F3 par la partie inférieure, les hydrocarbures remontent suivant les flèches F2 et flottent à la surface en 18. Les eaux épurées sortent de l'installation en 23 selon les flèches F4. Polluted water, containing hydrocarbons and grainy particles, enters 22 in the pollution control installation 20 comprising the lamellar plates 1 forming lamellar blocks 14 and a float 21. They are directed according to the arrows F1 through the top of the lamellar blocks 14 The sludge of grainy particles leaves according to the arrows F3 by the lower part, the hydrocarbons go up according to the arrows F2 and float on the surface at 18. The purified water leaves the installation in 23 according to the arrows F4.
La Figure 10 illustre le pivotement des plaques lamellaires 1 selon les flèches Fv jusqu'à une position verticale Pv. Figure 10 illustrates the pivoting of the lamellar plates 1 according to the arrows Fv to a vertical position Pv.
Les Figures 12 et 13 illustrent des configurations dans lesquelles les plaques lamellaires sont respectivement inclinées et "tête-bêche". Figures 12 and 13 illustrate configurations in which the lamellar plates are respectively inclined and "head to tail".
L'homme de l'art comprendra que bien que l'invention ait été décrite et illustrée pour des modes de réalisation particuliers, de nombreuses variantes peuvent être envisagées tout en restant dans le cadre de l'invention tel que défini dans les revendications annexées. Those skilled in the art will understand that although the invention has been described and illustrated for particular embodiments, many variants can be envisaged while remaining within the scope of the invention as defined in the appended claims.
Claims (14)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9716789A FR2773083B1 (en) | 1997-12-31 | 1997-12-31 | LAMELLAR PLATE FOR PARTICULATE DECANTATION AND SEPARATION OF DROPS OF LIGHT LIQUIDS FOR THE DEPOLLUTION OF RAINWATER AND INDUSTRIAL WATERS AND DECANTATION PLANT COMPRISING SAME |
| FR9816667A FR2773084B1 (en) | 1997-12-31 | 1998-12-30 | LAMELLAR PLATE FOR PARTICULATE DECANTATION AND SEPARATION OF DROPS OF LIGHT LIQUIDS FOR THE DEPOLLUTION OF RAINWATER AND INDUSTRIAL WATERS AND DECANTATION PLANT COMPRISING SAME |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9716789A FR2773083B1 (en) | 1997-12-31 | 1997-12-31 | LAMELLAR PLATE FOR PARTICULATE DECANTATION AND SEPARATION OF DROPS OF LIGHT LIQUIDS FOR THE DEPOLLUTION OF RAINWATER AND INDUSTRIAL WATERS AND DECANTATION PLANT COMPRISING SAME |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2773083A1 true FR2773083A1 (en) | 1999-07-02 |
| FR2773083B1 FR2773083B1 (en) | 2000-03-31 |
Family
ID=9515370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9716789A Expired - Fee Related FR2773083B1 (en) | 1997-12-31 | 1997-12-31 | LAMELLAR PLATE FOR PARTICULATE DECANTATION AND SEPARATION OF DROPS OF LIGHT LIQUIDS FOR THE DEPOLLUTION OF RAINWATER AND INDUSTRIAL WATERS AND DECANTATION PLANT COMPRISING SAME |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2773083B1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB382711A (en) * | 1931-09-17 | 1932-11-03 | Cornelis Joannes Hugo Penning | Improvements in or relating to apparatus for use in the settling of liquids containing matter in suspension |
| US4039449A (en) * | 1976-05-20 | 1977-08-02 | Ecodyne Corporation | Floc barrier |
| US4213865A (en) * | 1978-07-21 | 1980-07-22 | Fabrication Unlimited, Inc. | Apparatus for separating sludge, oil and the like from contaminated water |
| GB2150039A (en) * | 1983-11-24 | 1985-06-26 | Permutit Boby Ltd | Process and apparatus for separating a dispersed phase from a liquid |
-
1997
- 1997-12-31 FR FR9716789A patent/FR2773083B1/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB382711A (en) * | 1931-09-17 | 1932-11-03 | Cornelis Joannes Hugo Penning | Improvements in or relating to apparatus for use in the settling of liquids containing matter in suspension |
| US4039449A (en) * | 1976-05-20 | 1977-08-02 | Ecodyne Corporation | Floc barrier |
| US4213865A (en) * | 1978-07-21 | 1980-07-22 | Fabrication Unlimited, Inc. | Apparatus for separating sludge, oil and the like from contaminated water |
| GB2150039A (en) * | 1983-11-24 | 1985-06-26 | Permutit Boby Ltd | Process and apparatus for separating a dispersed phase from a liquid |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2773083B1 (en) | 2000-03-31 |
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|---|---|---|---|
| ST | Notification of lapse |