WO2024251953A1 - Ensemble de décantation d'un effluent - Google Patents
Ensemble de décantation d'un effluent Download PDFInfo
- Publication number
- WO2024251953A1 WO2024251953A1 PCT/EP2024/065743 EP2024065743W WO2024251953A1 WO 2024251953 A1 WO2024251953 A1 WO 2024251953A1 EP 2024065743 W EP2024065743 W EP 2024065743W WO 2024251953 A1 WO2024251953 A1 WO 2024251953A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- settling
- basin
- effluent
- compartment
- assembly according
- 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.)
- Ceased
Links
Classifications
-
- 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
- B01D21/0012—Settling tanks making use of filters, e.g. by floating layers of particulate material
-
- 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
- B01D21/24—Feed or discharge mechanisms for settling tanks
- B01D21/2405—Feed mechanisms for settling tanks
- B01D21/2416—Liquid distributors with a plurality of feed points
-
- 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
-
- 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
- B01D21/245—Discharge mechanisms for the sediments
- B01D21/2466—Mammoth pumps, e.g. air lift pumps
Definitions
- the present invention relates to the field of water treatment and, in particular, to an assembly for settling an effluent.
- the invention relates to the supply of the effluent into a circular lamellar decanter.
- Lamellar settlers are commonly used in effluent treatment to separate particles suspended in water.
- an effluent settling unit comprising a settling basin and a device for supplying said settling basin with effluent
- said settling basin comprises a bottom and an external wall in the general shape of a right circular cylinder delimiting a settling volume
- said settling assembly being characterized in that it comprises a flow distribution and energy dissipation compartment capable of directly receiving the effluent from the feed device, said compartment being installed in the settling basin and delimited by at least a portion of the external wall of the settling basin, by at least one other liquid-tight side wall, and by a bottom wall perforated with a plurality of orifices, forming an intermediate volume; said plurality of orifices providing fluid communication between the intermediate volume and the settling volume.
- the assembly further comprises lamellar modules installed in said settling volume of said settling basin and chutes for recovering the settled water on the surface of said settling basin.
- lamellar modules installed in said settling volume of said settling basin and chutes for recovering the settled water on the surface of said settling basin.
- said bottom wall of said flow distribution and energy dissipation compartment is mounted at a height from the bottom of the settling basin lower than the height of the recovery chutes.
- said bottom wall is mounted at a height from the bottom, greater than or equal to two thirds of the total height of the pool.
- the orifices are uniformly distributed on the bottom wall. This allows for improved flow distribution.
- each orifice has a diameter between 3 cm and 40 cm.
- the holes are spaced 5 cm to 60 cm apart from each other.
- said portion of the external wall extends so that between its ends it forms an angle with respect to the center of the basin of between 20° and 160°.
- FIG. 1 is a schematic side view of a decantation assembly according to the main embodiment of the invention.
- FIG. 1 is a schematic perspective view of the decantation assembly according to the main embodiment of the invention.
- FIG. 1 is a top view of the flow distribution and energy dissipation compartment of the decantation assembly according to the main embodiment of the invention.
- FIG. 1 is a perspective view of the flow distribution and energy dissipation compartment, the external wall of the settling basin not being shown;
- FIG. 1 is a top view of the decantation assembly according to the main embodiment of the invention.
- a settling assembly 1 for an effluent comprises a settling basin 2 and a device 9 for supplying said basin with effluent.
- the settling basin 2 generally comprises at least a bottom 21 and an external wall 22 in the general shape of a right circular cylinder, defining a settling volume.
- such a pool can have a diameter ranging from 5m to 30m, and a depth, also called total height, of between 2m and 10m.
- the basin further comprises a recovery pit 20 for the settled particles.
- the settling assembly 1 comprises lamellar modules 10 installed in said settling basin 2, and recovery chutes 11 for the settled water.
- the lamellar modules 10 are known to be formed of lamellae, frequently in a “ honeycomb " cross section, which can be inclined at an angle of between 45 and 60 degrees relative to the horizontal so as to promote the separation and fallout of solid particles.
- the heaviest particles suspended in the effluent fall by gravity to the bottom of the basin.
- a scraper bridge not shown, then scrapes these particles and causes them to fall into the recovery pit 20, comprising a suction nozzle allowing the particles to be collected.
- This decantation is made possible by the low turbulence of the effluent in basin 2, which explains in particular the desire to dissipate the energy of the effluent flow brought into basin 2.
- the lightest particles suspended in the effluent are separated during the passage of the effluent through the lamellar modules, the operation of which is known to those skilled in the art, the clear water then being collected in the upper part of the lamellar modules by overflowing into recovery chutes 11.
- chutes 11 the edges of which extend above the level of the effluent from the basin 2, have partly submerged openings, so that the water leaving the lamellar modules flows into the recovery chutes 11 through these openings.
- the assembly 1 comprises a flow distribution and energy dissipation compartment 4, intended to receive the effluent arriving from the feed device 9, before it enters the settling basin 2.
- the supply device 9 for said effluent may comprise distribution pipes, pumps or channels for conveying the effluent to the flow distribution and energy dissipation compartment 4.
- the flow distribution and energy dissipation compartment 4 is made in basin 2.
- said compartment 4 is contained in the volume defined by the external wall 22 in the general shape of a right circular cylinder.
- This flow distribution and energy dissipation compartment 4 is formed by at least one portion 23 of the external wall 22 of the settling basin 2, and by a liquid-tight side wall 6 formed in said settling basin 2, forming an intermediate volume.
- the side wall 6 thus takes the form of a chord to the circle formed by the external wall 22.
- the portion 23 of the external wall 22 extends here, seen from above, over an arc forming an angle with the center of the basin of between 20° and 160°.
- the side wall 6 is positioned so that the surface area occupied by the compartment 4 is between 5% and 40% of the general surface area of the pool.
- the side wall 6 extends on either side to the external wall 22.
- the compartment 4 is delimited by the portion 23 of the external wall 22 and by one or more side walls.
- side wall(s) 6 do not necessarily extend in a flat manner, but may have curved, concave or convex shapes, or any other shape suitable for the decanter.
- the lamellar modules 10 are mounted in the basin outside the compartment 4, and preferably in an arrangement allowing maximum distance between these lamellar modules 10 and the compartment 4, so as to limit the interactions of the fluids penetrating into the basin 2 and the fluids rising towards the lamellar modules 10.
- the lamellar modules extend into the basin from an edge diametrically opposite the portion 23 of the external wall 22 of the compartment 4.
- the side wall 6 forms a chord of the circle delimiting the periphery of the basin 2, so that the outline of the compartment 4 is formed by the chord and by the arc of the circle delimited by the chord.
- This flow distribution and energy dissipation compartment 4 comprises a bottom wall 7 perforated with a plurality of orifices 8 opening into the settling volume of the settling basin 2.
- the bottom wall 7 extends substantially parallel to the bottom 21 of the settling basin 2, which ensures an advantageous distribution of the effluent in the compartment 4.
- bottom wall 7 could also present a total or partial variation, relative to the bottom 21.
- the feed device 9 discharges an effluent into said compartment 4.
- This feed device 9 is installed and opens from the portion of the cylindrical surface 22 forming the flow distribution and energy dissipation compartment 4.
- the effluent supply device 9 emerges from the periphery of the settling basin 2, which in particular allows for simplified technical implementation, in particular in civil engineering, of the effluent supply, unlike supplies to the centre of the settling basin.
- This bottom wall 7 is here made of concrete, but can be made of any other suitable material, whether plastic, polymer materials, metals, composites, adapted in particular to the type of effluent to be treated.
- the bottom wall has a thickness depending on the material used.
- the invention is not limited to a particular thickness, but may range, for example, from 1 mm to 50 cm, depending on the material used.
- the bottom wall 7 of the compartment 4 is formed so that its level, or height, relative to the bottom of the settling basin 21, is lower than a minimum level of effluent present in the settling basin under operational conditions.
- the bottom wall 7 is mounted at a height, starting from the bottom 21, greater than or equal to two thirds of the total height of the basin 2 and less than the total height of the basin 2.
- the effluent level 12 in the settling basin is higher than the level of the bottom wall 7 of compartment 4.
- the effluent in flow distribution and energy dissipation compartment 4 enters the basin by balancing the effluent levels between compartment 4 and settling basin 2.
- the water is extracted as described by overflowing into the recovery chutes 11, which allows the effluent contained in the compartment 4 to penetrate into the basin 2.
- the level of the bottom wall 7 has a height lower than the height of the recovery chutes 11.
- the bottom wall 7 comprises a plurality of orifices 8, distributed substantially uniformly over its entire surface.
- These orifices 8 are sized to allow free passage of the effluent, while ensuring dissipation of its energy.
- the orifices 8 are, in the main embodiment of the invention, uniformly distributed on the bottom wall 7.
- the orifices 8 may have a diameter of between 3 and 40 cm and may be spaced 5 to 60 cm from each other, depending on the surface area of the bottom wall 7 and the properties of the effluent.
- the invention is however not limited to a uniform distribution of the orifices on the bottom wall 7.
- the bottom wall 7 may in particular comprise an orifice arrangement according to a predefined non-regular pattern.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Sewage (AREA)
- Details Of Heat-Exchange And Heat-Transfer (AREA)
Abstract
Description
Claims (8)
- Ensemble de décantation (1) d’un effluent comprenant un bassin de décantation (2) et un dispositif d’alimentation (9) dudit bassin de décantation (2) en effluent,
ledit bassin de décantation (2) comprend un fond (21) et une paroi externe (22) en forme générale de cylindre circulaire droit délimitant un volume de décantation,
ledit ensemble de décantation (1) étant caractérisé en ce qu’il comprend un compartiment de répartition du flux et de dissipation de l’énergie (4) apte à recevoir directement l’effluent du dispositif d’alimentation (9), ledit compartiment (4) étant installé dans le bassin de décantation (2) et délimité par au moins une portion (23) de la paroi externe (22) du bassin de décantation (2), par au moins une autre paroi latérale (6) étanche aux liquides, et par une paroi de fond (7) perforée d’une pluralité d’orifices (8), formant un volume intermédiaire ; ladite pluralité d’orifices (8) mettant un communication fluidique le volume intermédiaire avec le volume de décantation. - Ensemble selon la revendication 1, caractérisé en ce qu’il comprend en outre des modules lamellaires (10) installés dans le volume de décantation dudit bassin de décantation (2) et des goulottes de récupération (11) des eaux décantées à la surface dudit bassin de décantation (2).
- Ensemble de décantation selon la revendication 2, caractérisé en ce que ladite paroi de fond (7) dudit compartiment de répartition du flux et de dissipation de l’énergie (4) est montée à une hauteur du fond (21) du bassin de décantation (2) inférieure à la hauteur des goulottes de récupération (11).
- Ensemble de décantation selon la revendication 3, caractérisé en ce que ladite paroi de fond (7) est montée à une hauteur du fond (21), supérieure ou égale aux deux tiers de la hauteur totale du bassin (2).
- Ensemble selon l’une quelconque des revendications 1 à 4, caractérisé en ce que les orifices (8) sont uniformément répartis sur la paroi de fond.
- Ensemble selon l’une quelconque des revendications 1 à 5, caractérisé en ce que chaque orifice (8) présente un diamètre compris entre 3 cm et 40 cm.
- Ensemble selon l’une quelconque des revendications 1 à 6, caractérisé en ce que les orifices (8) sont espacés de 5 cm à 60 cm les uns des autres.
- Ensemble selon l’une quelconque des revendication 1 à 7, caractérisé en ce que ladite portion (23) de la paroi externe (22) s’étend de sorte qu’entre ses extrémités elle forme un angle par rapport au centre du bassin (2) compris entre 20° et 160°.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP24732437.9A EP4724166A1 (fr) | 2023-06-08 | 2024-06-07 | Ensemble de décantation d'un effluent |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FRFR2305772 | 2023-06-08 | ||
| FR2305772A FR3149518B1 (fr) | 2023-06-08 | 2023-06-08 | Ensemble de décantation d’un effluent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024251953A1 true WO2024251953A1 (fr) | 2024-12-12 |
Family
ID=88585142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2024/065743 Ceased WO2024251953A1 (fr) | 2023-06-08 | 2024-06-07 | Ensemble de décantation d'un effluent |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4724166A1 (fr) |
| FR (1) | FR3149518B1 (fr) |
| WO (1) | WO2024251953A1 (fr) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1535591A (en) * | 1976-04-29 | 1978-12-13 | See Soc D Epuration Et D Entre | Preparation of drinkable water |
| US4194976A (en) * | 1977-10-05 | 1980-03-25 | Robinsky Eli I | Gravitational separator having membrane baffles therein |
| DE10128062A1 (de) * | 2001-06-09 | 2002-12-12 | Henkel Kgaa | Entschlammungseinrichtung und Verfahren zum Entschlammen einer Flüssigkeit |
| US20170065908A1 (en) * | 2015-09-08 | 2017-03-09 | Daniel Charhut | Continuous Dewatering Recirculation System with Integral Coal Combustion Residual High Flow Plate Separator |
| CN106731046A (zh) * | 2016-12-30 | 2017-05-31 | 日照市光润模具制造有限公司 | 石材切割污水细砂沉淀出砂系统 |
-
2023
- 2023-06-08 FR FR2305772A patent/FR3149518B1/fr active Active
-
2024
- 2024-06-07 WO PCT/EP2024/065743 patent/WO2024251953A1/fr not_active Ceased
- 2024-06-07 EP EP24732437.9A patent/EP4724166A1/fr active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1535591A (en) * | 1976-04-29 | 1978-12-13 | See Soc D Epuration Et D Entre | Preparation of drinkable water |
| US4194976A (en) * | 1977-10-05 | 1980-03-25 | Robinsky Eli I | Gravitational separator having membrane baffles therein |
| DE10128062A1 (de) * | 2001-06-09 | 2002-12-12 | Henkel Kgaa | Entschlammungseinrichtung und Verfahren zum Entschlammen einer Flüssigkeit |
| US20170065908A1 (en) * | 2015-09-08 | 2017-03-09 | Daniel Charhut | Continuous Dewatering Recirculation System with Integral Coal Combustion Residual High Flow Plate Separator |
| CN106731046A (zh) * | 2016-12-30 | 2017-05-31 | 日照市光润模具制造有限公司 | 石材切割污水细砂沉淀出砂系统 |
Also Published As
| Publication number | Publication date |
|---|---|
| FR3149518B1 (fr) | 2025-10-17 |
| FR3149518A1 (fr) | 2024-12-13 |
| EP4724166A1 (fr) | 2026-04-15 |
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