EP0687497A1 - Flüssigkeitsbelüftungs- und Rührvorrichtung, beispielsweise für fetthaltige Abwässer - Google Patents

Flüssigkeitsbelüftungs- und Rührvorrichtung, beispielsweise für fetthaltige Abwässer Download PDF

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Publication number
EP0687497A1
EP0687497A1 EP95401088A EP95401088A EP0687497A1 EP 0687497 A1 EP0687497 A1 EP 0687497A1 EP 95401088 A EP95401088 A EP 95401088A EP 95401088 A EP95401088 A EP 95401088A EP 0687497 A1 EP0687497 A1 EP 0687497A1
Authority
EP
European Patent Office
Prior art keywords
chimney
liquid
shaft
vortex
tank
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.)
Withdrawn
Application number
EP95401088A
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English (en)
French (fr)
Inventor
Alain Boulant
Daniel Villessot
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
D'AMENAGEMENT URBAIN ET RURAL - SAUR Ste
Original Assignee
Internationale De Services Et D'environnement Cise Internationale Cie
SERVICES ET D ENVIRONNEMENT C
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 Internationale De Services Et D'environnement Cise Internationale Cie, SERVICES ET D ENVIRONNEMENT C filed Critical Internationale De Services Et D'environnement Cise Internationale Cie
Publication of EP0687497A1 publication Critical patent/EP0687497A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2334—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements provided with stationary guiding means surrounding at least partially the stirrer
    • B01F23/23341—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements provided with stationary guiding means surrounding at least partially the stirrer with tubes surrounding the stirrer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2336—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the location of the place of introduction of the gas relative to the stirrer
    • B01F23/23362—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the location of the place of introduction of the gas relative to the stirrer the gas being introduced under the stirrer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/113—Propeller-shaped stirrers for producing an axial flow, e.g. shaped like a ship or aircraft propeller
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/119—Stirrers with rigid wires or flexible rods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/19—Stirrers with two or more mixing elements mounted in sequence on the same axis
    • B01F27/192—Stirrers with two or more mixing elements mounted in sequence on the same axis with dissimilar elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis

Definitions

  • the subject of the present invention is a device for aeration and mixing of a liquid, such as for example greasy effluents extracted from urban effluents of wastewater.
  • This purification produces by-products linked to the purification such as grease, sludge ...
  • Landfills are less and less accepting this type of product, so that wastewater treatment plants must now be able to treat them to limit them as much as possible.
  • the fat trapped at the entrance to the treatment plant is poured into a biological degradation tank, which has internally and at its lower part injection ramps in the liquid of the pressurized air.
  • the rising bubbles allow to aerate and stir the liquid naturally.
  • this type of aeration and stirring device is more particularly suitable for lightly loaded fluids, that is to say of low viscosity and its yield decreases rapidly for fluids loaded in particular with grease.
  • the object of the invention is to avoid these drawbacks by proposing a device for aeration and stirring of a liquid such as for example the greasy effluents extracted from urban effluents of wastewater which allows, by simple means and consuming little d energy, to effectively treat this kind of liquid.
  • a tank 1 provided at its upper part with an orifice 2 for entering a liquid 3 to be treated, such as for example greasy effluents extracted from urban effluents of wastewater.
  • the tank 1 is provided with at least one device for aerating and stirring the liquid 3 and generally designated by the reference 10.
  • the ventilation and stirring device 10 according to the invention arranged inside the tank 1 consists of a vertical chimney 11 extending over part of the height of said tank 1 and open at its two ends 11a and 11b.
  • the upper end 11a of the chimney 11 is provided with a funnel 12 flared upwards.
  • the upper edge 12a of the funnel 12 provides a free space 13 with the wall of the tank 1 for the passage of the liquid 3 and this upper edge 12a is situated just below the surface 3a of the liquid 3.
  • the lower end 11b of the chimney 11 provides with the bottom of the tank 1 a passage 14 for the liquid 3.
  • the assembly constituted by the chimney 11 and the funnel 12 is fixed inside the tank by suitable means not shown in FIG. 1.
  • the device also includes a vertical shaft 15 driven in rotation by a gear motor 16.
  • This shaft 15 is placed inside and extends over the entire height of the chimney 11.
  • the vertical shaft 15 rotates a propeller 18 disposed inside the chimney 11 below the upper orifice 11a of this chimney 11 for the suction of the liquid from the top to the bottom in said chimney 11.
  • the diameter of the propeller 18 is slightly less than the inside diameter of the chimney 11.
  • a first anti-vortex member 19 is disposed inside the chimney 11 below the propeller 18 to prevent the rotation of the liquid 3 in said chimney 11.
  • this anti-vortex member 19 consists of three vertical plates 19a distributed at 120 ° inside the chimney 11.
  • a second anti-vortex member 20 can also be placed above the propeller 18 in the funnel 12.
  • this anti-vortex member 20 also consists of three vertical plates 20a distributed at 120 ° inside the funnel 12.
  • the device also includes means 22 for stirring of the liquid 3 integral in rotation with the shaft 15 and disposed inside the chimney 11 below the anti-vortex member 19 relative to the direction of circulation of the liquid in the chimney 11.
  • the means 22 for stirring the liquid 3 are formed by several filiform members 23 each forming an arc in a substantially vertical plane and distributed over at least part of the length of said shaft 15 between the anti-vortex member 19 and the lower end 11b of the chimney 11.
  • the filiform members 23 are arranged over the entire length of the shaft 15 between the anti-vortex member 19 and the lower end 11b of the chimney 11.
  • the filiform members 23 can be arranged in the same vertical plane or staggered.
  • each filiform member 23 is formed by a cable 24, the two ends of which are integral with the shaft 15.
  • each filiform member 23 is formed by a rod 25 of which only the end 25a located highest on the shaft 15 is fixed on the latter so as to avoid the hanging of tows inside the chimney 11.
  • Each filiform member 23 has any cross section and preferably circular with a diameter between 3 to 5 mm.
  • the device also comprises means 27 for injecting a pressurized gas such as, for example, air into the chimney 11 below the anti-vortex member 19.
  • a pressurized gas such as, for example, air
  • injection means 26 are formed by at at least one pipe 27 opening into the chimney 11 at a level situated between the filiform member 23 situated below the anti-vortex member 19 and the middle of the portion of the chimney 11 comprised between the first anti-vortex member 19 and the lower part 11b of the chimney 11.
  • the shaft 15 may also comprise, just below the surface 3a of the liquid 3, a member 28 for forming a vortex at the level of said surface 3a of the liquid 3 so as to promote the suction of the foam. by the propeller 18 inside said chimney 11.
  • the device which has just been described operates in the following manner.
  • the liquid 3 to be treated is poured through the orifice 2 into the tank 1 up to a level situated just above the upper edge 12a of the funnel 12.
  • the geared motor 16 rotates the shaft 15 which itself rotates the member 28, the propeller 18 and the filiform members 23.
  • the gas under pressure is injected into the chimney 11 via the conduits 27.
  • the rotation of the propeller 18 causes a suction of the liquid 3 in the chimney 11 so that this liquid 3 circulates continuously from top to bottom, in this chimney 11, then passes into the space 14 and circulates from bottom to top between said chimney 11 and the internal wall of the tank 1 and so on.
  • the anti-vortex members 19 and 20 prevent the rotation of the liquid 3 in the chimney 11.
  • the bubbles of gas under pressure disperse in the liquid 3 inside the chimney 11 and under the effect of the rotation of the filiform organs 23, the liquid 3 is stirred and the gas bubbles are divided into micro-bubbles promoting the dispersion of the gas and therefore the aeration of the liquid 3.
  • the liquid to be treated passes several times in the chimney and undergoes including several oxygenation treatments.
  • the flow rate of such a device is approximately 800m3 / hour on a pilot with a grease capacity of 17.5m3.
  • the device according to the invention applies for example to the treatment of water, urban effluents, industrial waste water, grease by biodegradation, waste materials, to the ozonation of water by an ozonated gas with or without catalyst, to stabilize sludge or can be used in thermophilic treatment.
  • This device can also be used as a reactor operating in a fluidized bed.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
EP95401088A 1994-06-16 1995-05-10 Flüssigkeitsbelüftungs- und Rührvorrichtung, beispielsweise für fetthaltige Abwässer Withdrawn EP0687497A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9407394 1994-06-16
FR9407394A FR2721229B1 (fr) 1994-06-16 1994-06-16 Dispositif d'aération et de brassage d'un liquide comme par exemple les effluents graisseux.

Publications (1)

Publication Number Publication Date
EP0687497A1 true EP0687497A1 (de) 1995-12-20

Family

ID=9464299

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95401088A Withdrawn EP0687497A1 (de) 1994-06-16 1995-05-10 Flüssigkeitsbelüftungs- und Rührvorrichtung, beispielsweise für fetthaltige Abwässer

Country Status (2)

Country Link
EP (1) EP0687497A1 (de)
FR (1) FR2721229B1 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0818422A1 (de) * 1996-07-12 1998-01-14 Compagnie Internationale De Services Et D'environnement C.I.S.E. Internationale Vorrichtung zur Rückgewinnung und Zurückführung des Schaumes in einem Abwasserbehandlungsreaktor
FR2758094A1 (fr) * 1997-01-08 1998-07-10 Alain Boulant Dispositif de brassage et d'aeration d'un liquide et d'elimination de la mousse dans une cuve de traitement de ce liquide
US6460830B1 (en) * 1997-01-08 2002-10-08 Carbofil International Device for stirring and aerating a liquid and eliminating foam in a tank for treating said liquid
FR2823743A1 (fr) * 2001-04-19 2002-10-25 Alain Boulant Dispositif pour brasser et aerer un liquide dans une cuve de traitement
FR2860168A1 (fr) * 2003-09-30 2005-04-01 Bio Armor Environnement Dispositif d'evacuation des mousses produites dans des bassins aerateurs
US7261279B2 (en) 2001-04-19 2007-08-28 Innova Environnement Device for stirring and aerating a liquid in a treatment vessel
WO2011101580A1 (fr) 2010-02-18 2011-08-25 Carbofil France Installation de traitement de digestats provenant d'au moins une enceinte de méthanisation de matières essentiellement organiques
CN110605047A (zh) * 2019-09-12 2019-12-24 重庆市三叶家具有限责任公司 一种软体家具加工生产线

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0264905A1 (de) * 1986-10-21 1988-04-27 Union Carbide Corporation Verfahren und Vorrichtung zum Mischen von Gasen und Flüssigkeiten
EP0374967A1 (de) * 1988-12-23 1990-06-27 Praxair Technology, Inc. Gas-/Flüssigkeits-Mischer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0264905A1 (de) * 1986-10-21 1988-04-27 Union Carbide Corporation Verfahren und Vorrichtung zum Mischen von Gasen und Flüssigkeiten
EP0374967A1 (de) * 1988-12-23 1990-06-27 Praxair Technology, Inc. Gas-/Flüssigkeits-Mischer

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0818422A1 (de) * 1996-07-12 1998-01-14 Compagnie Internationale De Services Et D'environnement C.I.S.E. Internationale Vorrichtung zur Rückgewinnung und Zurückführung des Schaumes in einem Abwasserbehandlungsreaktor
FR2750890A1 (fr) * 1996-07-12 1998-01-16 Services Et D Environnement Ci Dispositif de recuperation et de recyclage de mousse dans une cuve de traitement d'un liquide
CZ297858B6 (cs) * 1997-01-08 2007-04-18 Carbofil International Zarízení pro míchání a provzdusnování kapaliny a pro eliminaci peny uvnitr nádrze pri zpracování této kapaliny
WO1998030319A1 (fr) * 1997-01-08 1998-07-16 Carbofil International Dispositif de brassage et d'aeration d'un liquide et d'elimination de la mousse dans une cuve de traitement de ce liquide
AU720825B2 (en) * 1997-01-08 2000-06-15 Carbofil International Device for stirring and aerating a liquid and eliminating the foam in a tank for treating said liquid
US6460830B1 (en) * 1997-01-08 2002-10-08 Carbofil International Device for stirring and aerating a liquid and eliminating foam in a tank for treating said liquid
FR2758094A1 (fr) * 1997-01-08 1998-07-10 Alain Boulant Dispositif de brassage et d'aeration d'un liquide et d'elimination de la mousse dans une cuve de traitement de ce liquide
FR2823743A1 (fr) * 2001-04-19 2002-10-25 Alain Boulant Dispositif pour brasser et aerer un liquide dans une cuve de traitement
WO2002085502A1 (fr) * 2001-04-19 2002-10-31 Innova Environnement Dispositif pour brasser et aerer un liquide dans une cuve de traitement
US7261279B2 (en) 2001-04-19 2007-08-28 Innova Environnement Device for stirring and aerating a liquid in a treatment vessel
FR2860168A1 (fr) * 2003-09-30 2005-04-01 Bio Armor Environnement Dispositif d'evacuation des mousses produites dans des bassins aerateurs
WO2011101580A1 (fr) 2010-02-18 2011-08-25 Carbofil France Installation de traitement de digestats provenant d'au moins une enceinte de méthanisation de matières essentiellement organiques
CN110605047A (zh) * 2019-09-12 2019-12-24 重庆市三叶家具有限责任公司 一种软体家具加工生产线

Also Published As

Publication number Publication date
FR2721229B1 (fr) 1996-09-06
FR2721229A1 (fr) 1995-12-22

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