FR2609459A1 - Apparatus for stirring and aerating a liquid mass, especially for a biological purification station - Google Patents

Apparatus for stirring and aerating a liquid mass, especially for a biological purification station Download PDF

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Publication number
FR2609459A1
FR2609459A1 FR8700604A FR8700604A FR2609459A1 FR 2609459 A1 FR2609459 A1 FR 2609459A1 FR 8700604 A FR8700604 A FR 8700604A FR 8700604 A FR8700604 A FR 8700604A FR 2609459 A1 FR2609459 A1 FR 2609459A1
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FR
France
Prior art keywords
propeller
turbine
liquid mass
height
aerator
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.)
Pending
Application number
FR8700604A
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French (fr)
Inventor
Jean Louis Saussac
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TECH MELANGE INDL
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TECH MELANGE INDL
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Filing date
Publication date
Application filed by TECH MELANGE INDL filed Critical TECH MELANGE INDL
Priority to FR8700604A priority Critical patent/FR2609459A1/en
Publication of FR2609459A1 publication Critical patent/FR2609459A1/en
Pending legal-status Critical Current

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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
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/14—Activated sludge processes using surface aeration
    • C02F3/16—Activated sludge processes using surface aeration the aerator having a vertical axis
    • 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
    • B01F23/234—Surface aerating
    • B01F23/2342—Surface aerating with stirrers near to the liquid surface, e.g. partially immersed, for spraying the liquid in the gas or for sucking gas into the liquid, e.g. using stirrers rotating around a horizontal axis or using centrifugal force
    • B01F23/23421—Surface aerating with stirrers near to the liquid surface, e.g. partially immersed, for spraying the liquid in the gas or for sucking gas into the liquid, e.g. using stirrers rotating around a horizontal axis or using centrifugal force the stirrers rotating about a vertical axis
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Abstract

The subject of the invention relates to the technical field of means for mixing fluids. This apparatus comprises, in combination on the same control shaft 2 coupled to a unit for driving in rotation, a turbine 3 and a propeller 4 which are superposed and suitably spaced in two horizontal planes so that the said turbine 3 is arranged at the surface of the liquid to act as an aerator while the propeller 4 is arranged at a lower level to ensure the mixing of the liquid mass.

Description

L'invention concerne un appareil agitateur et aéra- teur d'une masse liquide, notamment pour station d'épuration biologique. The invention relates to an agitator and aerator for a liquid mass, in particular for a biological treatment plant.

L'objet de l'invention se rattache au secteur techn1.- que des moyens de mélange des fluides. The object of the invention relates to the techn1.- sector that means for mixing fluids.

On sait que pour assurer le bon fonctionnement des systèmes d'épuration biologique, il est nécessaire d'introduire de l'oxygène das des quantités suffisantes pour permettre a micro-organismes de se développer normalement. De mème., l'ef- fluent doit être mélangé à la boue biologique qui est maintenue en suspension. Dans ce but, la plupart des bassins de stations d'épuration biologique sont équipés de système d'aération. It is known that to ensure the proper functioning of biological purification systems, it is necessary to introduce oxygen in sufficient quantities to allow microorganisms to develop normally. Likewise, the effluent must be mixed with the biological mud which is kept in suspension. For this purpose, most of the basins of biological treatment plants are equipped with aeration system.

On distingue essentiellement les systèmes d'insuffla- tion d'air et les aérateurs de surface. There are mainly air blast systems and surface aerators.

Dans le premier cas, la masse liquide est aérée par une insufflation d'air au moyen de surpresseur, afin d'injecter au fond des bassins par l'intermédiaire de poreux. des bulles d'air qui vont oxygéner le bassin au cors de leur trajet. De tels systèmes nécessitent des bassins assez profonds pour aug- menter le trajet des fines bulles. In the first case, the liquid mass is aerated by an air blast by means of a booster, in order to inject at the bottom of the basins via porous. air bubbles which will oxygenate the basin during their journey. Such systems require basins deep enough to increase the path of fine bubbles.

Le rendement obtenu est bon en eau claire mais devient médiocre lorsque 1 eau est charmée de boue. The yield obtained is good in clear water but becomes poor when 1 water is charmed with mud.

En ce qui concerne les aérateurs de surface, il exis te @ actuellement des brosses ou des turbines.  As far as surface aerators are concerned, there are currently brushes or turbines.

Les systèmes d'aération utilisant les brosses sont très performants avec un trbs bon rendement. Cependant, leur coat est élevé ce qui limite considérablement leur utilisation. The ventilation systems using the brushes are very efficient with very good performance. However, their coat is high which considerably limits their use.

Quant aux turbines d'aération, elles sont couramment utilisées en épuration biologique et offrent des résultats intérestants. Toutefois des mesures d'oxygénation faites avec os sondes oxymétriques placées dans la masse liquide 3. des points déterminés selon des règles précises, font apparaître que les points près de la gerbe sont très vite =aturé-= er. n ox oxygène, la messe liquide s'oxygénant $grâce au débit de recirculation du mobile d'aération. Le pouvoir de brassage est limité, car la quasi-totalité de la puissance est absorbée par la turbine d'aération. As for aeration turbines, they are commonly used in biological purification and offer interesting results. However, oxygenation measurements made with bone oximetric probes placed in the liquid mass 3. points determined according to precise rules, show that the points near the sheaf are very quickly = aturé- = er. n oxygen oxygen, the liquid mass oxygenating $ thanks to the recirculation flow of the aeration mobile. The stirring power is limited, since almost all of the power is absorbed by the aeration turbine.

Le problème étant ainsi posé pour remédier à ces inconvénients, l'invention s'est fiée pour but de dissocier l'aération et la recirculation. The problem thus being posed to remedy these drawbacks, the invention relied on the aim of dissociating aeration and recirculation.

Pour atteindre ce résultat, il a été étudié un appa- reil qui est remarquable en ce qu'il comprend en combinaison sur le même arbre de commande accouplé à un groupe d'entraînement en rotation une turbine et une hélice superposées convenablement espacées de telle sorte que ladite turbine est disposée à la surface du liquide pour faire office d'aérateur tandis que l'hé- lice est disposée a un niveau inférieur pour assurer le mélange de la masse liquide. To achieve this result, an apparatus has been studied which is remarkable in that it comprises in combination on the same control shaft coupled to a rotary drive group a turbine and a propeller superimposed suitably spaced so that that said turbine is arranged on the surface of the liquid to act as an aerator while the propeller is arranged at a lower level to ensure mixing of the liquid mass.

L' invention est exposée ci-après plus en détail à l'aide des dessins qui représentent seulement un mode d'exécu- tion
- la figure 1 est une vue de face de l'appareil monté dans un bassin d'épuration
- la figure 2 est une vue en coupe considérée selon la ligne 2.2. de la figure 1,
- la figure .- est une vue en coupe considérée selon la ligne 3.3. de le figure 1.The invention is explained below in more detail with the aid of the drawings which represent only one embodiment.
- Figure 1 is a front view of the device mounted in a treatment tank
- Figure 2 is a sectional view taken along line 2.2. of figure 1,
- Figure .- is a sectional view taken along line 3.3. of figure 1.

Afin de rendre plus concret l'objet de l'invention, on le décrit maintenant sous une forme non limitative en se ré- forant aux exemples de réalisation des fiauxes des dessins. In order to make the object of the invention more concrete, it will now be described in a non-limiting form, referring to the examples of embodiments of the drawings.

L'appareil comprend un groupe d'entraînement (1) dont l'arbre de commande (2) est de longueur déterminés pour recevoir en combinaison une turbine (3) et une hélce (4) dans deu plans horizontaux et parallèles. L'arbre tsj d'une manière connue est dispos verticalement. The apparatus comprises a drive unit (1) whose control shaft (2) is of determined length to receive in combination a turbine (3) and a propeller (4) in two horizontal and parallel planes. The tsj tree in a known manner is arranged vertically.

Selon l'invention. la turbine (3) est accouplée sur l'arbre (2) pour être disposée, après fixetion du groupe d'en traînement (1), à la surface du liquide, pour 4aire office d'aérateur. Inversement, l'hélice (4) est accouplée sur l'arbre (2) a un niveau inférieur, pour assurer le mélange de la masse liquide. According to the invention. the impeller (3) is coupled to the shaft (2) to be placed, after fixing the drive unit (1), on the surface of the liquid, for 4th office of aerator. Conversely, the propeller (4) is coupled to the shaft (2) at a lower level, to ensure mixing of the liquid mass.

La distance (D) entre la turbine et l'hélice, le diamètre des pales (4a) de l'hélice, le diamètre, l'inclinaison et le nombre de pales (3a) de la turbine sont fonction de la profondeur (P) du bassin. The distance (D) between the turbine and the propeller, the diameter of the blades (4a) of the propeller, the diameter, the inclination and the number of blades (3a) of the turbine are a function of the depth (P) of the pelvis.

D'une manière pré+érée, la turbine (3) est composée de plusieurs pales minces (3a) convenablement orientées et soudées sur un moyeu (3b) pour assurer une valeur élevée du ta de transfert d'oxygène ainsi qu'une bonne mise en suspension des boues. L'hélice (4) est composée de 3 pales (42i à profil mince décale da le et convenablement orientées pour créer un effet d' asplrstion.  In a pre + ered manner, the turbine (3) is composed of several thin blades (3a) suitably oriented and welded on a hub (3b) to ensure a high value of the oxygen transfer ta as well as a good setting suspended sludge. The propeller (4) is made up of 3 blades (42i with a thin profile, offset from it and suitably oriented to create an asplrstion effect.

L'hélice (4) peut être montée d'une manière réglable sur 1 'arbre de commande (2).  The propeller (4) can be mounted in an adjustable manner on one control shaft (2).

Compte-tenu de l effet conjugué de la turbine qui travaille en surface pour provoquer une gerbe et du travail @ de l'hélice en profondeur pour assurer un mélange de la masse liqui de on améliore grandement le système d'aération classique de l'ordre de 20 a 30 > . Les valeurs d'oxygénation donnees par les sondes oxymétriques (S1) et (52) respectivement piacées en partie haute et bars de la masse liquide, sont égales. Given the combined effect of the turbine which works on the surface to cause a spray and the work @ of the propeller in depth to ensure mixing of the liquid mass, the conventional aeration system is greatly improved from 20 to 30>. The oxygenation values given by the oximetric probes (S1) and (52) respectively pinned in the upper part and bars of the liquid mass, are equal.

Il est bien évident que la fixation du groupe d'entraînement (1) sur une partie du bassin ou autre, s'effectue par tout moyen connu et approprié. It is obvious that the attachment of the drive unit (1) to a part of the pool or the like is carried out by any known and appropriate means.

Les avantages ressortent bien de la description.  The advantages are apparent from the description.

Claims (5)

REVENDICATIONS - 1 - Appareil agitateur et aérateur d'une masse liquide notamment pour station d'épuration biologique, caractérisé en ce qu'il comprend en combinaison sur le meme arbre de commande (2) accouplé à un groupe d'entraînement en rotation, une turbine (3) et une hélice (4) superposées et convenablement espacées dans plans horizontaux de telle sorte que ladite turbine (3) est disposée à la surface du liquide pour faire office d'aérateur tandis que l'hélice (4) est disposée à un niveau inférieur pour assurer le mélange de la masse liquide.- 1 - Stirrer and aerator for a liquid mass, in particular for biological treatment plant, characterized in that it comprises in combination on the same control shaft (2) coupled to a rotary drive group, a turbine (3) and a propeller (4) superimposed and suitably spaced in horizontal planes so that said turbine (3) is arranged on the surface of the liquid to act as an aerator while the propeller (4) is arranged at a lower level to ensure mixing of the liquid mass. - 2 - Appareil selon la revendication i, cara-térisé en ce que la distance (D) entre la turbine et l'hélice est fonction de la hauteur de la masse d'eau.- 2 - Apparatus according to claim i, cara-terized in that the distance (D) between the turbine and the propeller is a function of the height of the body of water. - 3 - Appareil selon la revendication i, caractérisé en ce que le diamètre, l'inclinaison et le nombre de paies (38) de la turbine (3) sont fonction de la hauteur de la masse d'eau.- 3 - Apparatus according to claim i, characterized in that the diameter, the inclination and the number of pays (38) of the turbine (3) are a function of the height of the body of water. - 4 - appareil selon la revendication 1, caractérisé en ce que le diamètre de l'hélice est fonction de la hauteur de la masse d'eau. - 4 - Apparatus according to claim 1, characterized in that the diameter of the propeller is a function of the height of the body of water. - 5 - Appareil selon la revendication 1, caractérisé en ce que la turbine (a) est composée de plusieurs pales minces (a) convenablement orientées et soudées sur un moyeu (3b) pour assurer une valeur levée du taux de transfert d'oxygène et une bonne mise en suspension des boues.- 5 - Apparatus according to claim 1, characterized in that the turbine (a) is composed of several thin blades (a) suitably oriented and welded to a hub (3b) to ensure a raised value of the oxygen transfer rate and good sludge suspension. - t Appareil selon la revendication i, caractérisé e ce que l'hélice (3a) est composée de parles à profil mince convenablement orientées pour crier un effet d'aspiration. - t Apparatus according to claim i, characterized e that the propeller (3a) is composed of thin profile speakers suitably oriented to shout a suction effect. - 7 - Appareil selon la revendication 6, caractérisé en ce que l'hélice (3) est montée d'une manière réglable sur l'arbre de commande 12). - 7 - Apparatus according to claim 6, characterized in that the propeller (3) is mounted in an adjustable manner on the control shaft 12).
FR8700604A 1987-01-12 1987-01-12 Apparatus for stirring and aerating a liquid mass, especially for a biological purification station Pending FR2609459A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8700604A FR2609459A1 (en) 1987-01-12 1987-01-12 Apparatus for stirring and aerating a liquid mass, especially for a biological purification station

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8700604A FR2609459A1 (en) 1987-01-12 1987-01-12 Apparatus for stirring and aerating a liquid mass, especially for a biological purification station

Publications (1)

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FR2609459A1 true FR2609459A1 (en) 1988-07-15

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999001386A1 (en) * 1997-06-30 1999-01-14 Aquasystems International N.V. Device for mixing and aerating liquids
EP2492003A1 (en) 2011-02-25 2012-08-29 Jean-Pierre Grasa Device for mechanical treatment of a liquid composition and method for mechanical treatment of such a liquid composition

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR725375A (en) * 1931-10-28 1932-05-11 Maschf Augsburg Nuernberg Ag Propeller stirrer-mixer
DE1632423A1 (en) * 1968-01-04 1969-10-23 Uhde Gmbh Friedrich Device for fumigation of liquids
FR1598796A (en) * 1968-03-14 1970-07-06
DE1964125A1 (en) * 1969-12-22 1971-06-24 Babcock & Wilcox Ag Surface aerator for liquids
DE2606121A1 (en) * 1976-02-16 1977-08-18 Baum Franz Josef Dipl Ing Activated sludge treatment with surface aerator - and immersed pump to ensure forced circulation throughout tank depth

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR725375A (en) * 1931-10-28 1932-05-11 Maschf Augsburg Nuernberg Ag Propeller stirrer-mixer
DE1632423A1 (en) * 1968-01-04 1969-10-23 Uhde Gmbh Friedrich Device for fumigation of liquids
FR1598796A (en) * 1968-03-14 1970-07-06
DE1964125A1 (en) * 1969-12-22 1971-06-24 Babcock & Wilcox Ag Surface aerator for liquids
DE2606121A1 (en) * 1976-02-16 1977-08-18 Baum Franz Josef Dipl Ing Activated sludge treatment with surface aerator - and immersed pump to ensure forced circulation throughout tank depth

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999001386A1 (en) * 1997-06-30 1999-01-14 Aquasystems International N.V. Device for mixing and aerating liquids
BE1011246A5 (en) * 1997-06-30 1999-06-01 Aquasystems Int Nv Device for mixing and aerating of liquids.
US6227525B1 (en) 1997-06-30 2001-05-08 Aquasystems International N.V. Device for mixing and aerating liquids
EP2492003A1 (en) 2011-02-25 2012-08-29 Jean-Pierre Grasa Device for mechanical treatment of a liquid composition and method for mechanical treatment of such a liquid composition
WO2012113931A1 (en) 2011-02-25 2012-08-30 Jean-Pierre Grasa Apparatus for mechanically treating a liquid composition and method for mechanically treating such a liquid composition
FR2971951A1 (en) * 2011-02-25 2012-08-31 Jean Pierre Grasa APPARATUS FOR THE MECHANICAL TREATMENT OF A LIQUID COMPOSITION AND METHOD FOR THE MECHANICAL TREATMENT OF SUCH A LIQUID COMPOSITION
CN103391807A (en) * 2011-02-25 2013-11-13 J-P·格拉萨 Apparatus for mechanically treating a liquid composition and method for mechanically treating such a liquid composition
US9187919B2 (en) 2011-02-25 2015-11-17 Jean-Pierre Grasa Apparatus for mechanically treating a liquid composition and method for mechanically treating such a liquid composition

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