EP1379325A1 - Device for stirring and aerating a liquid in a treatment vessel - Google Patents

Device for stirring and aerating a liquid in a treatment vessel

Info

Publication number
EP1379325A1
EP1379325A1 EP02727664A EP02727664A EP1379325A1 EP 1379325 A1 EP1379325 A1 EP 1379325A1 EP 02727664 A EP02727664 A EP 02727664A EP 02727664 A EP02727664 A EP 02727664A EP 1379325 A1 EP1379325 A1 EP 1379325A1
Authority
EP
European Patent Office
Prior art keywords
liquid
sheath
air
funnel
propeller
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Withdrawn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
EP02727664A
Other languages
German (de)
French (fr)
Inventor
Alain Boulant
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.)
Innova Environnement
Original Assignee
Innova Environnement
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 Innova Environnement filed Critical Innova Environnement
Publication of EP1379325A1 publication Critical patent/EP1379325A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/02Aerobic processes
    • C02F3/12Activated sludge processes
    • C02F3/14Activated sludge processes using surface aeration
    • C02F3/16Activated sludge processes using surface aeration the aerator having a vertical axis
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20Mixing gases with liquids
    • B01F23/23Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2334Mixing 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
    • B01F23/23341Mixing 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20Mixing gases with liquids
    • B01F23/23Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2336Mixing 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
    • B01F23/23363Mixing 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 above the stirrer
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/02Aerobic processes
    • C02F3/12Activated sludge processes
    • C02F3/22Activated sludge processes using circulation pipes
    • C02F3/226"Deep shaft" processes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/305Treatment of water, waste water or sewage
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05Stirrers
    • B01F27/11Stirrers characterised by the configuration of the stirrers
    • B01F27/113Propeller-shaped stirrers for producing an axial flow, e.g. shaped like a ship or aircraft propeller
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/10Biological treatment of water, waste water, or sewage

Definitions

  • the present invention relates to a device for brewing and aerating a liquid in a treatment tank.
  • Document DE 34 27 174 discloses a device for brewing and aerating a liquid in a treatment tank, comprising:
  • sheath connected to said funnel and intended to extend towards the bottom of said tank, said sheath comprising at least one opening in each of its upper and lower parts,
  • these air incorporation means consisting exclusively of means adapted to incorporate air into atmospheric pressure into said liquid under the sole effect of the movement of said liquid to inside said device.
  • the air incorporation means comprise a tubular element disposed around the propeller drive shaft, this hollow element extending between the exterior of the device and the interior sheath.
  • the object of the present invention is to remedy this drawback.
  • This object of the invention is achieved with a device for brewing and aerating a liquid in a treatment tank, comprising:
  • sheath connected to said funnel and intended to extend towards the bottom of said tank, said sheath comprising at least one opening in each of its upper and lower parts,
  • these air incorporation means consisting exclusively of means adapted to incorporate into said liquid air at atmospheric pressure under the sole effect of the movement of said liquid inside said device, this device being remarkable in that said means for incorporating air comprise the upper edge of said funnel, shaped to so as to form a cascade of liquid at the periphery of said funnel.
  • said funnel comprises a substantially conical bottom surmounted by a substantially cylindrical belt defining said edge
  • said air incorporation means comprise a plurality of projections distributed over the upper edge of said funnel
  • said means for incorporating air comprise an annular member extending inside said funnel
  • said annular member is shaped as an annular gutter
  • said annular member is shaped as an annular grid, - said sheath extends up above the upper edge of said funnel, and said air intake means comprise at least one window formed in the upper part of said sheath,
  • Said air incorporation means comprise anti-vortex means arranged inside said sheath above said main propeller, - said air incorporation means comprise a liquid accelerator inside said sheath,
  • said means for incorporating air comprise means for aerating the surface of said liquid
  • said air incorporation means comprise a vortex pump inside said sheath
  • said air incorporation means comprise a single-channel propeller inside said sheath
  • said air incorporation means comprise a two-channel propeller inside said sheath, said main propeller is of the mainly axial flow type, said device comprises anti-vortex means arranged inside said sheath below said main propeller,
  • said device comprises dynamic stirring means
  • said device comprises static means for stirring by turbulence arranged inside said sheath,
  • - Said device comprises means for sucking inside said sheath of the foam formed on the surface. of said liquid.
  • the present invention also relates to a liquid processing tank, remarkable in that it is equipped with a device according to any one of the preceding claims.
  • FIG. 1 is a schematic sectional view of a liquid treatment tank equipped with a first embodiment of the device according to the invention
  • FIG. 2 is a sectional view along line 2-2 of FIG. 1,
  • FIG. 3 is a perspective view of the treatment tank in FIG. 1,
  • FIG. 3bis is a schematic sectional view of a liquid treatment tank equipped with a second embodiment of the device according to the invention
  • FIG. 4 is a sectional view along line 4-4 of Figure 3
  • FIG. 5 is a partial schematic view in section of a third embodiment of the device according to the invention.
  • FIG. 6 is a schematic sectional view of a liquid accelerator, associated with the third embodiment of the device according to the invention
  • - Figure 7 is a schematic sectional view of means for aerating the surface of the liquid associated with the accelerator of Figure 6
  • FIG. 8 is a partial schematic view in section of a fourth embodiment of the device according to the invention.
  • FIG. 9 is a schematic view on a larger scale of the vortex pump of the fourth embodiment of the device according to the invention.
  • FIG. 10 is a sectional view along line 10-10 of FIG. 9,
  • FIG. 11 is a partial schematic view in section of a fifth embodiment of the device according to the invention.
  • FIG. 12 is a sectional view along line 12-12 of Figure 11
  • - Figure 13 is a partial schematic view in section of a sixth mode for producing the device according to the invention.
  • FIG. 14 is a sectional view along line 14-14 of Figure 13.
  • identical references designate identical or similar members or sets of members.
  • 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 treatment tank 1 can be covered on its external face with an insulator 4 and comprises a device for stirring and aerating the liquid according to the invention, generally designated by the reference 10.
  • This device 10 disposed inside the tank 1 comprises a funnel 11 flared upwards, placed in the upper part of the tank 1, the upper edge of which provides with the wall of the tank 1 a free space 11a for passage liquid 3.
  • This funnel comprises a substantially conical bottom 11b surmounted by a substantially cylindrical belt 11c.
  • This device also comprises a sheath 12 connected to this funnel and extending in the direction of the bottom of the tank 1, this sheath comprising an opening 12a in its upper part opening into the bottom of the funnel 11, and an opening 12b in its lower part opening into the vicinity of the bottom of the tank 1.
  • the device 10 is also provided with means for sucking the liquid inside the sheath 12, comprising a main propeller 13 arranged under the bottom of the funnel 11, fixed to a vertical shaft 14 itself capable of being driven in rotation by a geared motor 15.
  • the propeller 13 is preferably of the type known per se with predominantly axial flow, that is to say of the type capable of generating a field of speeds slightly inclined relative to the axis of the propeller.
  • This type of propeller is used in particular in applications where it is essential, for safety reasons, to fair the propeller: the fact that this propeller generates a mainly axial flow, it makes it possible to limit the energy losses on the fairing walls, and thus optimize performance.
  • This type of propeller is found, for example, in towing ships, the propellers of which it is essential to protect to prevent them from getting caught in the ropes of ships to be towed.
  • An anti-vortex member 16 is preferably placed inside the sheath 12 below the propeller 13 to prevent the rotation of the liquid 3 in the sheath 12. As shown in FIG. 2, this anti-vortex member 16 comprises three vertical plates 16a distributed at 120 ° inside said sheath 12.
  • the upper edge of the funnel 11 includes a plurality of projections 17 which may have the shape of regularly spaced teeth.
  • the device 10 may include an annular member 18 extending inside the funnel 11, in the vicinity of its upper part.
  • This member can for example be formed by an annular gutter, as shown, or by an annular metal grid.
  • the device 10 can be connected to the interior of the tank 1 by lugs 19a which provide between them passages for the liquid 3.
  • lugs 19a which provide between them passages for the liquid 3.
  • FIG. 3bis on which a second embodiment of the invention.
  • the sheath 12 extends to above the upper edge of the funnel 11, and the upper end of this sheath is closed by a plate 20 supporting the geared motor 15.
  • the sheath 12 has a first series of windows 21 uniformly distributed around the periphery of this sheath 12 and located at the level of the liquid 3 inside the funnel 11. This sheath 12 is also provided with a second series of windows 22 uniformly distributed around the circumference of the sheath 12 and located above the bottom of the funnel 11.
  • the device 10 is provided with means for adjusting the flow rate of liquid 3 and of foam 23 drawn in by the main propeller 13 inside the sheath 12 through the windows 21 and 22.
  • each sleeve 25 and 26 are formed, on the one hand, by a first sleeve 25 disposed around the sheath 12 at the first series of windows 21 and, on the other hand, by a second sleeve 26 disposed around said sheath 12 at the second series of windows 22. • The position of each sleeve 25 and 26 relative to the windows 21 and 22 is vertically adjustable by suitable clamping means, not shown.
  • the device 10 also comprises means for regulating the level of liquid 3 in the funnel 1.
  • These means may comprise an overflow pipe 27 disposed inside the funnel 11 and the position is vertically adjustable.
  • the device 10 also comprises static means 30 for turbulently stirring the liquid 3 inside the sheath 12 arranged below the anti-vortex member 16 in the sheath 12.
  • the static means 30 are formed, on the one hand, by a vertical tube 31 disposed inside the sheath 12 and extending from the bottom of the tank 1 to the underside of the anti-vortex member 16 and, on the other hand, by superimposed obstacles 32, disposed inside the sheath 12 and fixed to the tube 31.
  • the tube 31 is fixed to the bottom of the tank 1 by appropriate means .
  • the obstacles 32 form passages with the internal wall of the sheath 12 for the circulation of the liquid.
  • the obstacles 32 are preferably distributed over the tube 31, on the one hand, below the anti-vortex member 16 and, on the other hand, at the bottom of the sheath 12.
  • the tube 31 has at its upper part, below the anti-vortex member 16, two superimposed obstacles 32 and at the lower part of the sheath 12 also two superimposed obstacles 32.
  • the obstacles 32 can be regularly distributed over the entire portion of the tube 31 disposed in the sheath 12.
  • the obstacles 32 are preferably formed by cups whose concavity is directed towards the bottom of the tank 1.
  • the obstacles 32 can be formed by discs.
  • the static means for stirring by turbulence can be formed by obstacles placed on the internal wall of the sheath 12 and providing an axial passage for the circulation of the liquid 3.
  • These obstacles can be regularly distributed over the entire portion of the sheath 12 situated below the anti-vortex member 16, or be grouped on the one hand below the anti-vortex member 16 and on the other hand in the lower part of the sheath 12.
  • the obstacles can be formed by cups whose concavity is directed towards the bottom of the tank 1 or by discs.
  • the device 10 does not include an annular member 18 (see Figure 3).
  • the invention also relates to a device which, in addition to the characteristics of the second embodiment, would include such an annular member. More generally, it should be understood that the invention relates to any device for incorporating air into the liquid to be treated in which the means for incorporating air consist exclusively of means suitable for incorporating said liquid with air at pressure. atmospheric under the sole effect of the movement of said liquid inside said device, and in which these means for incorporating air comprise the upper edge of said funnel shaped so as to form a cascade of liquid at the periphery of said funnel .
  • the invention also relates to a device comprising windows 21, 22, but no static means 31 for swirling by turbulence.
  • the invention also relates to a device having dynamic means for stirring the liquid located in the sheath, for example in accordance with the teaching of patent application EP 0 687 497, but not comprising means for injecting air under pressure, contrary to what is taught by this request.
  • these dynamic stirring means may comprise a "long shaft”, that is to say a shaft extending under the main propeller 13 inside the sheath 12 and provided with means for brewing the liquid inside the sheath 12.
  • 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 to a level located above the upper edge of the funnel 11 (see Figures 1 and 3a).
  • This liquid 3 also pours inside this funnel 11.
  • the gear motor 15 rotates the shaft 14 which itself rotates the main propeller 13.
  • the rotation of the main propeller 13 causes a suction of the liquid 3 in the sheath 12 so that this liquid 3 circulates continuously from top to bottom, in this sheath 12, then passes into the space 33 separating the lower end of the sheath 12 from the bottom of the tank 1 and flows from bottom to top between the sheath 12 and the internal wall of the tank 1 and so on.
  • the anti-vortex member 16 prevents rotation of the liquid in the sheath 12 below the propeller 13.
  • the projections 17 make it possible to separate the flow of liquid 3 into a plurality of veins which, on joining, naturally trap air.
  • the annular member 18 it in fact makes it possible to create a second cascade contributing to the incorporation of air.
  • the depression caused by the propeller 13 also has the effect of creating an additional cascade inside the sheath 12, which contributes to the incorporation of air into the liquid 3.
  • overflow pipe 27 makes it possible to adjust the level of the liquid 3 inside the funnel 11 so that this level is located approximately halfway up the windows 21.
  • the windows 21 allow the foam 23 located on the surface of the liquid 3 to be absorbed in the sheath 12, thus preventing this foam from flying away and polluting the environment.
  • liquid flow rate 3 can be adjusted by moving the sleeves 25 and 26 relative to the windows 21 and 22.
  • the obstacles 32 create, below each of these, a turbulence effect, making it possible to divide the air bubbles 34 into micro-bubbles, which promotes the process of biological degradation, and thus the yield of the device according to the invention.
  • the gas bubbles between the inner wall of the tank 1 and the sheath 12 accelerate the ascent of the liquid, promoting the circulation of this liquid inside the tank 1, which improves the yield.
  • the liquid to be treated passes several times through the sheath 12 and therefore undergoes several oxygenation treatments.
  • FIG. 3a make it possible to incorporate air into the liquid 3 under the sole effect of the movement of this liquid, this air making it possible to implement the process of biological degradation of the liquid 3.
  • a main propeller 20 of the type described above that is to say with mainly axial flow.
  • the choice of the speed of rotation of the main propeller 20 makes it possible to adapt the speed of the device according to the invention to the nature of the liquid to be treated.
  • the device comprises a second anti-vortex member 40 disposed inside the sheath 12 and above the main propeller 13.
  • This second anti-vortex member 40 is formed by at least two vertical plates 40a and each extended upwards by a reinforcing rib 41 extending to the upper end of said sheath 12.
  • the second anti-vortex member -vortex 40 is formed by four plates 40a vertical uniformly distributed inside the sheath 12 and each extended upwards by a reinforcing rib 41.
  • the second anti-vortex member 40 makes it possible to create a friction force on the liquid 3, which force generates eddies facilitating the incorporation of air into the liquid 3.
  • the device comprises a liquid accelerator inside the sheath 12.
  • This liquid accelerator is formed by a secondary propeller 45 disposed above the second anti-vortex member 40 and integral in rotation with the shaft 14.
  • the secondary propeller 45 has a pitch oriented in the same direction as the pitch of the main propeller 13.
  • the liquid accelerator also comprises an anti-vortex member 46 disposed above the secondary propeller 45 and inside a cylindrical chimney 47.
  • the chimney 47 is fixed to the internal edge of the ribs of reinforcement 41 so as to provide with the sheath 12 and between the reinforcement ribs 41 passages 48 for the liquid.
  • the secondary propeller 45, the anti-vortex member 46 and the chimney 47 are located between the two series of windows 21 and 22 which are, in this variant, provided with adjustment sleeves 25, 26.
  • the rotation of the main propeller 13 causes a suction of the liquid 3 in the sheath 12 through the windows 21 and 22 so that this liquid 3 circulates continuously from top to bottom in this sheath 12.
  • the anti-vortex member 46 prevents the rotation of the liquid in the chimney 47.
  • the acceleration and aspiration of the liquid have the effect of subjecting it to significant eddies promoting the incorporation of air into this liquid.
  • This variant is particularly suitable for products which are particularly foaming.
  • the device comprises means for aerating the surface of the liquid 3 inside the tank 1.
  • the means for aeration of the surface of the liquid 3 are formed by a secondary propeller 50 disposed above the second anti-vortex member 40 and integral in rotation with the shaft 14.
  • This secondary propeller 50 has an inverted pitch with respect to the pitch of the main propeller 13.
  • the means for aerating the surface of the liquid 3 also comprise an anti-vortex member 51 disposed above the secondary propeller 50 and inside a cylindrical chimney 52.
  • the chimney 52 is fixed to the internal edges of the reinforcing ribs 48 so as to provide with the sheath 12 and said reinforcing ribs 48 passages 55 for the liquid 3.
  • the secondary propeller 50 and the anti-vortex member 51 are situated between the two series of windows 21 and 22 and the chimney 52 extends substantially from the middle part of the first series of windows 21 to the upper edge of the second series of windows 22.
  • a cover 53 is mounted on the shaft 14 above the upper edge of the chimney 52.
  • the vertical position of the cover 53 is adjustable so as to provide with the upper edge of the chimney 52 an adjustable passage 54.
  • the rotation of the main propeller 13 causes a suction of the liquid 3 through the windows 21 and 22 so that this liquid 3 circulates from bottom to top in the sheath 12.
  • part of the liquid 3 is drawn into the sheath 12 through the windows 22 and another part of the liquid 3 is sucked in through the windows 21 and flows from top to bottom in the passages 55 formed between the chimney 52 and the sheath 12.
  • the projection of part of the liquid makes it possible to incorporate air into this liquid and, moreover, to reduce the formation of foam on the surface of this liquid.
  • the anti-vortex member 51 prevents the rotation of the liquid in the chimney 52 above the secondary propeller 50. Also in this variant, the liquid flow rate 3 in the sheath 12 can be adjusted by moving the sleeves 25 and 26 relative to the windows 21 and 22.
  • the device according to the invention comprises a vortex pump 60 for suction from the surface of the liquid inside the sheath 12.
  • This vortex pump 60 is arranged above the second anti-vortex member 40 and at the level of the first series of windows 21.
  • This vortex pump 60 is driven in rotation by the shaft 14 and comprises, on the one hand, a circular plate 61 fixed on this shaft 14 and provided on its upper face with radial and vertical blades 62 and, on the other hand, a chimney 63 fixed to the upper edge of said blades 62.
  • the assembly constituted by the plate 61, the blades 62 and the chimney 63 is held on the shaft 14 by means of a sleeve 61a whose vertical position on this shaft 14 is adjustable.
  • the sleeve 61a is fixed to said shaft 14 by means of a member constituted for example by a fixing screw, not shown.
  • the upper edge of the blades 62 is fitted with a crown 64 extending towards the outside of the chimney 63.
  • This chimney 63 extends upwards from the tank 1 substantially from the middle part of the first series of windows 21 to the upper edge of the blades 62.
  • This chimney 63 provides an internal passage 65 which communicates, at its lower part, with the interior of the sheath 12 by annular passages 66 formed between the blades 62 and between the crown 64 and the plate 61.
  • the chimney 63 is conical and the conicity is directed towards the upper part of the tank 1, as shown in FIG. 9.
  • the chimney 63 can be cylindrical.
  • the blades 62 are flat or curved and are preferably three in number, regularly distributed over the plate 61, as shown in FIG. 10.
  • the rotation of the main propeller 13 causes a suction of the liquid 3 in the sheath 12 through the windows 21 and 22 so that this liquid 3 circulates continuously from top to bottom in the sheath 12.
  • the adjustment of the liquid flow rate through the sleeves 25 and 26 inside the sheath 12 is not necessary.
  • the liquid 3 is subjected to significant eddies promoting the incorporation of air into this liquid.
  • This embodiment is particularly suitable for very foaming products because the foam floating on the surface of the liquid 3 is sucked by the vortex pump 60 which allows this foam to be removed quickly and efficiently.
  • the device according to the invention comprises a single-channel propeller 70 for sucking the liquid 3 inside the sheath 12.
  • This single-channel propeller 70 is disposed above the second anti-vortex member 40 and at the level of the first series of windows 21.
  • the single-channel propeller 70 is rotated by the shaft 14 and comprises, on the one hand, a circular plate 71 fixed on this shaft 14 and disposed above the level of the liquid 3 in the tank 1 and, on the other part, inside the liquid 3, a vertical plate
  • the plate 72 delimits a lateral inlet 73 for the liquid extending over the entire height of said plate 72, a vertical channel 74 for circulation of this liquid from top to bottom and a lower outlet 75 of said liquid.
  • the assembly constituted by the plate 71 and the vertical plate 72 is held on the shaft 14 by means of a sleeve 71a whose vertical position on this shaft 14 is adjustable.
  • the sleeve 71a is fixed to said shaft 14 by means of a member constituted for example by a fixing screw, not shown.
  • the internal edge of the vertical plate 72 comprises a vertical deflector 76 inclined in the direction of the center of the spiral formed by said plate 72.
  • the distance separating the plate 72 and the axis of the shaft 14 gradually decreases, as shown in Figure 12.
  • This liquid is stirred inside the vertical channel 74 and circulates in this channel 74 from top to bottom to be evacuated inside the sheath 12 by the lower outlet 75.
  • the deflector 76 improves the stirring of the liquid inside the vertical channel 74 and prevents a return of the liquid through the lateral inlet 73.
  • the stirring carried out by the single-channel propeller 70 promotes the incorporation of air into the liquid 3.
  • the device according to the invention comprises a two-channel propeller 80 for sucking the liquid 3 inside the sheath 12.
  • This two-channel propeller 80 is arranged above the second anti-vortex organ
  • the two-channel propeller 80 is driven in rotation by the shaft 14 and comprises, on the one hand, a circular plate 81 fixed on this shaft 14 and disposed above the level of the liquid 3 in the tank 1 and, on the other part, inside the liquid 3, two vertical plates 82 and 83.
  • the vertical plates 82 and 83 are fixed on the underside of the plate 80 and each have the form of two half-shells which are opposite and offset with respect to each other as shown in FIG. 14.
  • the two plates 82 and 83 delimit two lateral inlets 84 and 85 of the liquid, two channels 86 and 87 for circulation of these liquids from top to bottom and a lower outlet 88 of said liquid.
  • the assembly constituted by the plate 81 and the vertical plates 82 and 83 is held on the shaft 14 by means of a sleeve 81a whose vertical position on this shaft 14 is adjustable.
  • the sleeve 81a is fixed to the shaft 14 by means of a member constituted for example by a fixing screw, not shown.
  • each plate 82 and 83 situated opposite the channel 86 or 87 delimited by the other plate comprises a vertical deflector, respectively 89 and 90.
  • the rotation of the two-channel propeller 80 driven by the shaft 14, that is to say the rotation of the assembly constituted by the plate 81 and the two vertical plates 82 and 83 in the direction indicated by the arrow in Figure 14 causes a suction of the liquid 3 through the windows 21.
  • This liquid enters through the lateral inlets 84 and 85 and is stirred inside the channels 86 and 87 and flows from top to bottom inside these channels 86 and 87, then is then discharged into the sheath 12 through the lower outlet 88.
  • the deflectors 89 and 90 increase the stirring of the liquid inside the channels 86 and 87 and prevent this liquid from flowing back through the lateral inlets 84 and 85.
  • the adjustment of the liquid flow rate through the sleeves 25 and 26 of the sheath 12 is not necessary and these latter two embodiments are more particularly used in the case where the liquid level at inside the tank 1 is variable.
  • a pumping propeller can be placed on the shaft 14 below the single-channel propeller or below the propeller dual-channel.
  • the device according to the invention applies for example to the treatment of water, urban effluents, industrial waste water, grease by biodegradation, draining materials, livestock waste and in general to all biodegradable industrial products.

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

Abstract

The invention concerns a device (10) for stirring and aerating a liquid (3) in a treatment vessel (1), comprising: at least a funnel (11); at least a casing (12) connected to said funnel (11); at least a main stirrer (13) located in said casing (12); means (14, 15) for driving said stirrer (13) in rotation; and means (17, 18) for incorporating air in said liquid, said air incorporating means consisting exclusively of means adapted to incorporate in said liquid (3) air at atmospheric pressure under the sole effect of the movement of said liquid (3) inside the device (10). Said device is characterised in that said air incorporating means include the upper edge of said funnel (11), configured so as form a cascade of liquid (3) at the periphery of said funnel (11).

Description

Dispositif pour brasser et aérer un liquide dans une cuve de traitement La présente invention se rapporte à un dispositif pour brasser et aérer un liquide dans une cuve de traitement. The present invention relates to a device for brewing and aerating a liquid in a treatment tank.
On connaît du document DE 34 27 174 un dispositif pour brasser et aérer un liquide dans une cuve de traitement, comprenant :Document DE 34 27 174 discloses a device for brewing and aerating a liquid in a treatment tank, comprising:
- au moins un entonnoir destiné à être disposé dans la partie supérieure de ladite cuve en ménageant un passage avec cette cuve,- at least one funnel intended to be placed in the upper part of said tank by providing a passage with this tank,
- au moins une gaine reliée audit entonnoir et destinée à s'étendre en direction du fond de ladite cuve, ladite gaine comportant au moins une ouverture dans chacune de ses parties supérieure et inférieure,at least one sheath connected to said funnel and intended to extend towards the bottom of said tank, said sheath comprising at least one opening in each of its upper and lower parts,
- au moins une hélice principale située dans ladite gaine,- at least one main propeller located in said sheath,
- des moyens pour entraîner ladite hélice en rotation, etmeans for driving said propeller in rotation, and
- des moyens pour incorporer de l'air audit liquide, ces moyens d'incorporation d'air étant constitués exclusivement de moyens adaptés pour incorporer audit liquide de l'air à la pression atmosphérique sous le seul effet de la mise en mouvement dudit liquide à l'intérieur dudit dispositif.means for incorporating air into said liquid, these air incorporation means consisting exclusively of means adapted to incorporate air into atmospheric pressure into said liquid under the sole effect of the movement of said liquid to inside said device.
Dans ce dispositif de la technique antérieure, les moyens d'incorporation d'air comprennent un élément tubulaire disposé autour de l'arbre d'entraînement de l'hélice, cet élément creux s'étendant entre l'extérieur du dispositif et l'intérieur de la gaine.In this device of the prior art, the air incorporation means comprise a tubular element disposed around the propeller drive shaft, this hollow element extending between the exterior of the device and the interior sheath.
Bien qu'ils favorisent le processus d'aération du liquide notamment en vue de sa dégradation bactériologique, ces moyens d'incorporation d'air ne permettent d'obtenir qu'un rendement global médiocre.Although they promote the aeration process of the liquid, in particular with a view to its bacteriological degradation, these means of incorporating air allow only a mediocre overall yield to be obtained.
La présente invention a pour but de remédier à cet inconvénient. On atteint ce but de l'invention avec un dispositif pour brasser et aérer un liquide dans une cuve de traitement, comprenant :The object of the present invention is to remedy this drawback. This object of the invention is achieved with a device for brewing and aerating a liquid in a treatment tank, comprising:
- au moins un entonnoir destiné à être disposé dans la partie supérieure de ladite cuve en ménageant un passage avec cette cuve,- at least one funnel intended to be placed in the upper part of said tank by providing a passage with this tank,
- au moins une gaine reliée audit entonnoir et destinée à s'étendre en direction du fond de ladite cuve, ladite gaine comportant au moins une ouverture dans chacune de ses parties supérieure et inférieure,at least one sheath connected to said funnel and intended to extend towards the bottom of said tank, said sheath comprising at least one opening in each of its upper and lower parts,
- au moins une hélice principale située dans ladite gaine,- at least one main propeller located in said sheath,
- des moyens pour entraîner ladite hélice en rotation, etmeans for driving said propeller in rotation, and
- des moyens pour incorporer de l'air audit liquide, ces moyens d'incorporation d'air étant constitués exclusivement de moyens adaptés pour incorporer audit liquide de l'air à la pression atmosphérique sous le seul effet de la mise en mouvement dudit liquide à l'intérieur dudit dispositif, ce dispositif étant remarquable en ce que lesdits moyens d'incorporation d'air comprennent le bord supérieur dudit entonnoir, conformé de manière à former une cascade de liquide à la périphérie dudit entonnoir.- Means for incorporating air into said liquid, these air incorporation means consisting exclusively of means adapted to incorporate into said liquid air at atmospheric pressure under the sole effect of the movement of said liquid inside said device, this device being remarkable in that said means for incorporating air comprise the upper edge of said funnel, shaped to so as to form a cascade of liquid at the periphery of said funnel.
Grâce à la présence d'une telle cascade, on peut incorporer une grande quantité d'air au liquide à traiter sans qu'il soit nécessaire d'avoir recours à un quelconque apport d'énergie supplémentaire.Thanks to the presence of such a cascade, a large amount of air can be incorporated into the liquid to be treated without the need for any additional energy input.
On peut de la sorte améliorer notablement le rendement global du dispositif d'aération et de brassage.This can significantly improve the overall performance of the ventilation and stirring device.
Suivant d'autres caractéristiques du dispositif selon l'invention :According to other characteristics of the device according to the invention:
- ledit entonnoir comprend un fond sensiblement conique surmonté d'une ceinture sensiblement cylindrique définissant ledit bord,said funnel comprises a substantially conical bottom surmounted by a substantially cylindrical belt defining said edge,
- lesdits moyens d'incorporation d'air comprennent une pluralité de saillies réparties sur le bord supérieur dudit entonnoir,said air incorporation means comprise a plurality of projections distributed over the upper edge of said funnel,
- lesdits moyens d'incorporation d'air comprennent un organe annulaire s'étendant à l'intérieur dudit entonnoir,said means for incorporating air comprise an annular member extending inside said funnel,
- ledit organe annulaire est conformé en gouttière annulaire,- said annular member is shaped as an annular gutter,
- ledit organe annulaire est conformé en grille annulaire, - ladite gaine s'étend jusqu'au-dessus du bord supérieur dudit entonnoir, et lesdits moyens d'incorporation d'air comprennent au moins une fenêtre formée dans la partie supérieure de ladite gaine,- said annular member is shaped as an annular grid, - said sheath extends up above the upper edge of said funnel, and said air intake means comprise at least one window formed in the upper part of said sheath,
- lesdits moyens d'incorporation d'air comprennent des moyens anti-vortex disposés à l'intérieur de ladite gaine au-dessus de ladite hélice principale, - lesdits moyens d'incorporation d'air comprennent un accélérateur de liquide à l'intérieur de ladite gaine,- Said air incorporation means comprise anti-vortex means arranged inside said sheath above said main propeller, - said air incorporation means comprise a liquid accelerator inside said sheath,
- lesdits moyens d'incorporation d'air comprennent des moyens d'aération de la surface dudit liquide,said means for incorporating air comprise means for aerating the surface of said liquid,
- lesdits moyens d'incorporation d'air comprennent une pompe à vortex à l'intérieur de ladite gaine,said air incorporation means comprise a vortex pump inside said sheath,
- lesdits moyens d'incorporation d'air comprennent une hélice monocanal à l'intérieur de ladite gaine,said air incorporation means comprise a single-channel propeller inside said sheath,
- lesdits moyens d'incorporation d'air comprennent une hélice bicanaux à l'intérieur de ladite gaine, - ladite hélice principale est du type à flux majoritairement axial, - ledit dispositif comprend des moyens anti-vortex disposés à l'intérieur de ladite gaine au-dessous de ladite hélice principale,said air incorporation means comprise a two-channel propeller inside said sheath, said main propeller is of the mainly axial flow type, said device comprises anti-vortex means arranged inside said sheath below said main propeller,
- ledit dispositif comprend des moyens dynamiques de brassage,said device comprises dynamic stirring means,
- ledit dispositif comprend des moyens statiques de brassage par turbulence disposés à l'intérieur de ladite gaine,said device comprises static means for stirring by turbulence arranged inside said sheath,
- ledit dispositif comprend des moyens pour aspirer à l'intérieur de ladite gaine de la mousse formée à la surface. dudit liquide.- Said device comprises means for sucking inside said sheath of the foam formed on the surface. of said liquid.
La présente invention se rapporte également à une cuve de traitement de liquide, remarquable en ce qu'elle est équipée d'un dispositif conforme à l'une quelconque des revendications précédentes.The present invention also relates to a liquid processing tank, remarkable in that it is equipped with a device according to any one of the preceding claims.
D'autres caractéristiques et avantages de la présente invention apparaîtront à la lumière de la description qui va suivre et à l'examen du dessin annexé, dans lequel :Other characteristics and advantages of the present invention will become apparent in the light of the description which follows and on examination of the appended drawing, in which:
- la Figure 1 est une vue schématique en coupe d'une cuve de traitement d'un liquide équipée d'un premier mode de réalisation du dispositif selon l'invention,FIG. 1 is a schematic sectional view of a liquid treatment tank equipped with a first embodiment of the device according to the invention,
- la Figure 2 est une vue en coupe selon la ligne 2-2 de la Figure 1 ,FIG. 2 is a sectional view along line 2-2 of FIG. 1,
- la Figure 3 est une vue en perspective de la cuve de traitement de la Figure 1 ,FIG. 3 is a perspective view of the treatment tank in FIG. 1,
- la Figure 3bis est une vue schématique en coupe d'une cuve de traitement d'un liquide équipée d'un second mode de réalisation du dispositif selon l'invention, - la Figure 4 est une vue en coupe selon la ligne 4-4 de la Figure 3,- Figure 3bis is a schematic sectional view of a liquid treatment tank equipped with a second embodiment of the device according to the invention, - Figure 4 is a sectional view along line 4-4 of Figure 3,
- la Figure 5 est une vue schématique partielle en coupe d'un troisième mode de réalisation du dispositif selon l'invention,FIG. 5 is a partial schematic view in section of a third embodiment of the device according to the invention,
- la Figure 6 est une vue schématique en coupe d'un accélérateur de liquide, associé au troisième mode de réalisation du dispositif selon l'invention, - la Figure 7 est une vue schématique en coupe de moyens d'aération de la surface du liquide associés à l'accélérateur de la Figure 6,- Figure 6 is a schematic sectional view of a liquid accelerator, associated with the third embodiment of the device according to the invention, - Figure 7 is a schematic sectional view of means for aerating the surface of the liquid associated with the accelerator of Figure 6,
- la Figure 8 est une vue schématique partielle et en coupe d'un quatrième mode de réalisation du dispositif selon l'invention,FIG. 8 is a partial schematic view in section of a fourth embodiment of the device according to the invention,
- la Figure 9 est une vue schématique et à plus grande échelle de la pompe à vortex du quatrième mode de réalisation du dispositif selon l'invention,FIG. 9 is a schematic view on a larger scale of the vortex pump of the fourth embodiment of the device according to the invention,
- la Figure 10 est une vue en coupe selon la ligne 10-10 de la Figure 9,FIG. 10 is a sectional view along line 10-10 of FIG. 9,
- la Figure 11 est une vue schématique partielle et en coupe d'un cinquième mode de réalisation du dispositif selon l'invention,FIG. 11 is a partial schematic view in section of a fifth embodiment of the device according to the invention,
- la Figure 12 est une vue en coupe selon la ligne 12-12 de la Figure 11 , - la Figure 13 est une vue schématique partielle et en coupe d'un sixième mode de réalisation du dispositif selon l'invention, et- Figure 12 is a sectional view along line 12-12 of Figure 11, - Figure 13 is a partial schematic view in section of a sixth mode for producing the device according to the invention, and
- la Figure 14 est une vue en coupe selon la ligne 14-14 de la Figure 13. Sur ces figures, des références identiques désignent des organes ou ensembles d'organes identiques ou analogues. Sur la Figure 1 , on a représenté une cuve 1 munie à sa partie supérieure d'un orifice 2 d'entrée d'un liquide 3 à traiter, comme par exemple des effluents graisseux extraits des effluents urbains d'eaux usées.- Figure 14 is a sectional view along line 14-14 of Figure 13. In these figures, identical references designate identical or similar members or sets of members. In Figure 1, there is shown 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.
La cuve de traitement 1 peut être recouverte sur sa face externe d'un isolant 4 et comporte un dispositif de brassage et d'aération du liquide selon l'invention, désigné dans son ensemble par la référence 10.The treatment tank 1 can be covered on its external face with an insulator 4 and comprises a device for stirring and aerating the liquid according to the invention, generally designated by the reference 10.
Ce dispositif 10 disposé à l'intérieur de la cuve 1 comprend un entonnoir 11 évasé vers le haut, placé dans la partie supérieure de la cuve 1 , dont le bord supérieur ménage avec la paroi de la cuve 1 un espace libre 11a pour le passage du liquide 3.This device 10 disposed inside the tank 1 comprises a funnel 11 flared upwards, placed in the upper part of the tank 1, the upper edge of which provides with the wall of the tank 1 a free space 11a for passage liquid 3.
Cet entonnoir comprend un fond sensiblement conique 11b surmonté d'une ceinture sensiblement cylindrique 11 c.This funnel comprises a substantially conical bottom 11b surmounted by a substantially cylindrical belt 11c.
Ce dispositif comprend également une gaine 12 reliée à cet entonnoir et s'étendant en direction du fond de la cuve 1 , cette gaine comportant une ouverture 12a dans sa partie supérieure débouchant dans le fond de l'entonnoir 11 , et une ouverture 12b dans sa partie inférieure débouchant au voisinage du fond de la cuve 1. Le dispositif 10 est aussi pourvu de moyens d'aspiration du liquide à l'intérieur de la gaine 12, comprenant une hélice principale 13 disposée sous le fond de l'entonnoir 11 , fixée à un arbre vertical 14 lui-même susceptible d'être entraîné en rotation par un moto-réducteur 15.This device also comprises a sheath 12 connected to this funnel and extending in the direction of the bottom of the tank 1, this sheath comprising an opening 12a in its upper part opening into the bottom of the funnel 11, and an opening 12b in its lower part opening into the vicinity of the bottom of the tank 1. The device 10 is also provided with means for sucking the liquid inside the sheath 12, comprising a main propeller 13 arranged under the bottom of the funnel 11, fixed to a vertical shaft 14 itself capable of being driven in rotation by a geared motor 15.
L'hélice 13 est de préférence du type connu en soi à flux majoritairement axial, c'est-à-dire du type susceptible d'engendrer un champ de vitesses faiblement inclinées par rapport à l'axe de l'hélice.The propeller 13 is preferably of the type known per se with predominantly axial flow, that is to say of the type capable of generating a field of speeds slightly inclined relative to the axis of the propeller.
On utilise notamment ce type d'hélice dans des applications où il est indispensable, pour des raisons de sécurité, de caréner l'hélice : du fait que cette hélice engendre un flux majoritairement axial, elle permet de limiter les pertes d'énergie sur les parois du carénage, et ainsi d'optimiser le rendement.This type of propeller is used in particular in applications where it is essential, for safety reasons, to fair the propeller: the fact that this propeller generates a mainly axial flow, it makes it possible to limit the energy losses on the fairing walls, and thus optimize performance.
On trouve par exemple ce type d'hélice dans les navires remorqueurs, dont il est indispensable de protéger les hélices pour éviter qu'elles ne se prennent dans les cordages des navires à remorquer.This type of propeller is found, for example, in towing ships, the propellers of which it is essential to protect to prevent them from getting caught in the ropes of ships to be towed.
Un organe anti-vortex 16 est de préférence disposé à l'intérieur de la gaine 12 au-dessous de l'hélice 13 pour éviter la rotation du liquide 3 dans la gaine 12. Comme cela est représenté sur la Figure 2, cet organe anti-vortex 16 comprend trois plaques verticales 16a réparties à 120° à l'intérieur de ladite gaine 12.An anti-vortex member 16 is preferably placed inside the sheath 12 below the propeller 13 to prevent the rotation of the liquid 3 in the sheath 12. As shown in FIG. 2, this anti-vortex member 16 comprises three vertical plates 16a distributed at 120 ° inside said sheath 12.
Aucun moyen d'injection d'air sous pression n'est prévu dans le dispositif selon l'invention. En option, comme cela est représenté sur les figures 1 et 3, le bord supérieur de l'entonnoir 11 comprend une pluralité de saillies 17 pouvant présenter la forme de dents régulièrement espacées.No means for injecting pressurized air is provided in the device according to the invention. Optionally, as shown in Figures 1 and 3, the upper edge of the funnel 11 includes a plurality of projections 17 which may have the shape of regularly spaced teeth.
En option également, comme cela est représenté sur les figures 1 et 3, le dispositif 10 peut comporter un organe annulaire 18 s'étendant à l'intérieur de l'entonnoir 11 , au voisinage de sa partie supérieure.Also optionally, as shown in Figures 1 and 3, the device 10 may include an annular member 18 extending inside the funnel 11, in the vicinity of its upper part.
Cet organe peut par exemple être formé par une gouttière annulaire, comme cela est représenté, ou par une grille métallique annulaire.This member can for example be formed by an annular gutter, as shown, or by an annular metal grid.
Le dispositif 10 peut être relié à l'intérieur de la cuve 1 par des pattes 19a qui ménagent entre elles des passages pour le liquide 3. On se reporte à présent à la Figure 3bis, sur laquelle on a représenté un second mode de réalisation de l'invention.The device 10 can be connected to the interior of the tank 1 by lugs 19a which provide between them passages for the liquid 3. Reference is now made to FIG. 3bis, on which a second embodiment of the invention.
On se contentera de décrire dans ce qui suit les caractéristiques qui différencient ce mode de réalisation du précédent.We will content ourselves with describing in the following the characteristics which differentiate this embodiment from the previous one.
La gaine 12 s'étend jusqu'au-dessus du bord supérieur de l'entonnoir 11 , et l'extrémité supérieure de cette gaine est obturée par une plaque 20 supportant le moto- réducteur 15.The sheath 12 extends to above the upper edge of the funnel 11, and the upper end of this sheath is closed by a plate 20 supporting the geared motor 15.
La gaine 12 comporte une première série de fenêtres 21 uniformément réparties sur le pourtour de cette gaine 12 et situées au niveau du liquide 3 à l'intérieur de l'entonnoir 11. Cette gaine 12 est également pourvue d'une seconde série de fenêtres 22 uniformément réparties sur le pourtour de la gaine 12 et situées au-dessus du fond de l'entonnoir 11.The sheath 12 has a first series of windows 21 uniformly distributed around the periphery of this sheath 12 and located at the level of the liquid 3 inside the funnel 11. This sheath 12 is also provided with a second series of windows 22 uniformly distributed around the circumference of the sheath 12 and located above the bottom of the funnel 11.
Le dispositif 10 est pourvu de moyens de réglage du débit de liquide 3 et de mousse 23 aspiré par l'hélice principale 13 à l'intérieur de la gaine 12 par les fenêtres 21 et 22.The device 10 is provided with means for adjusting the flow rate of liquid 3 and of foam 23 drawn in by the main propeller 13 inside the sheath 12 through the windows 21 and 22.
Ces moyens de réglage sont formés, d'une part, par un premier manchon 25 disposé autour de la gaine 12 au niveau de la première série de fenêtres 21 et, d'autre part, par un second manchon 26 disposé autour de ladite gaine 12 au niveau de la seconde série de fenêtres 22. La position de chaque manchon 25 et 26 par rapport respectivement aux fenêtres 21 et 22 est réglable verticalement par des moyens de serrage appropriés, non représentés.These adjustment means are formed, on the one hand, by a first sleeve 25 disposed around the sheath 12 at the first series of windows 21 and, on the other hand, by a second sleeve 26 disposed around said sheath 12 at the second series of windows 22. The position of each sleeve 25 and 26 relative to the windows 21 and 22 is vertically adjustable by suitable clamping means, not shown.
Dans ce deuxième mode de réalisation, le dispositif 10 comprend également des moyens de régulation du niveau de liquide 3 dans l'entonnoir 1. Ces moyens peuvent comprendre un tuyau de trop plein 27 disposé à l'intérieur de l'entonnoir 11 et dont la position est réglable verticalement.In this second embodiment, the device 10 also comprises means for regulating the level of liquid 3 in the funnel 1. These means may comprise an overflow pipe 27 disposed inside the funnel 11 and the position is vertically adjustable.
Dans ce deuxième mode de réalisation, le dispositif 10 comprend également des moyens statiques 30 de brassage par turbulence du liquide 3 à l'intérieur de la gaine 12 disposés au-dessous de l'organe anti-vortex 16 dans la gaine 12. Comme représenté sur les Figures 3bis et 4, les moyens statiques 30 sont formés, d'une part, par un tube vertical 31 disposé à l'intérieur de la gaine 12 et s'étendant du fond de la cuve 1 jusqu'au dessous de l'organe anti-vortex 16 et, d'autre part, par des obstacles 32 superposés, disposés à l'intérieur de la gaine 12 et fixés sur le tube 31. Le tube 31 est fixé sur le fond de la cuve 1 par des moyens appropriés.In this second embodiment, the device 10 also comprises static means 30 for turbulently stirring the liquid 3 inside the sheath 12 arranged below the anti-vortex member 16 in the sheath 12. As shown in FIGS. 3bis and 4, the static means 30 are formed, on the one hand, by a vertical tube 31 disposed inside the sheath 12 and extending from the bottom of the tank 1 to the underside of the anti-vortex member 16 and, on the other hand, by superimposed obstacles 32, disposed inside the sheath 12 and fixed to the tube 31. The tube 31 is fixed to the bottom of the tank 1 by appropriate means .
Les obstacles 32 ménagent avec la paroi interne de la gaine 12 des passages pour la circulation du liquide.The obstacles 32 form passages with the internal wall of the sheath 12 for the circulation of the liquid.
Comme cela est représenté à la Figure 3bis, les obstacles 32 sont de préférence répartis sur le tube 31 , d'une part, au-dessous de l'organe anti-vortex 16 et, d'autre part, à la partie inférieure de la gaine 12.As shown in FIG. 3a, the obstacles 32 are preferably distributed over the tube 31, on the one hand, below the anti-vortex member 16 and, on the other hand, at the bottom of the sheath 12.
Par exemple, le tube 31 comporte à sa partie supérieure, au-dessous de l'organe anti-vortex 16, deux obstacles 32 superposés et à la partie inférieure de la gaine 12 également deux obstacles 32 superposés.For example, the tube 31 has at its upper part, below the anti-vortex member 16, two superimposed obstacles 32 and at the lower part of the sheath 12 also two superimposed obstacles 32.
Selon une variante non représentée, les obstacles 32 peuvent être régulièrement répartis sur toute la portion du tube 31 disposée dans la gaine 12.According to a variant not shown, the obstacles 32 can be regularly distributed over the entire portion of the tube 31 disposed in the sheath 12.
Comme cela est représenté sur la Figure 3bis, les obstacles 32 sont de préférence formés par des coupelles dont la concavité est dirigée vers le fond de la cuve 1.As shown in FIG. 3a, the obstacles 32 are preferably formed by cups whose concavity is directed towards the bottom of the tank 1.
Selon une variante non représentée, les obstacles 32 peuvent être formés par des disques.According to a variant not shown, the obstacles 32 can be formed by discs.
Selon une autre variante non représentée, les moyens statiques de brassage par turbulence peuvent être formés par des obstacles disposés sur la paroi interne de la gaine 12 et ménageant un passage axial pour la circulation du liquide 3.According to another variant, not shown, the static means for stirring by turbulence can be formed by obstacles placed on the internal wall of the sheath 12 and providing an axial passage for the circulation of the liquid 3.
Ces obstacles peuvent être régulièrement répartis sur toute la portion de la gaine 12 située au-dessous de l'organe anti-vortex 16, ou être groupés d'une part au- dessous de l'organe anti-vortex 16 et d'autre part dans la partie inférieure de la gaine 12.These obstacles can be regularly distributed over the entire portion of the sheath 12 situated below the anti-vortex member 16, or be grouped on the one hand below the anti-vortex member 16 and on the other hand in the lower part of the sheath 12.
Dans ce cas également, les obstacles peuvent être formés par des coupelles dont la concavité est dirigée vers le fond de la cuve 1 ou par des disques. Dans le deuxième mode de réalisation, le dispositif 10 ne comporte pas d'organe annulaire 18 (voir Figure 3).In this case also, the obstacles can be formed by cups whose concavity is directed towards the bottom of the tank 1 or by discs. In the second embodiment, the device 10 does not include an annular member 18 (see Figure 3).
Cependant, il faut comprendre que l'invention concerne également un dispositif qui, outre les caractéristiques du deuxième mode de réalisation, comprendrait un tel organe annulaire. Plus généralement, il faut comprendre que l'invention concerne tout dispositif pour incorporer de l'air au liquide à traiter dans lequel les moyens d'incorporation d'air sont constitués exclusivement de moyens adaptés pour incorporer audit liquide de l'air à la pression atmosphérique sous le seul effet de la mise en mouvement dudit liquide à l'intérieur dudit dispositif, et dans lequel ces moyens d'incorporation d'air comprennent le bord supérieur dudit entonnoir conformé de manière à former une cascade de liquide à la périphérie dudit entonnoir.However, it should be understood that the invention also relates to a device which, in addition to the characteristics of the second embodiment, would include such an annular member. More generally, it should be understood that the invention relates to any device for incorporating air into the liquid to be treated in which the means for incorporating air consist exclusively of means suitable for incorporating said liquid with air at pressure. atmospheric under the sole effect of the movement of said liquid inside said device, and in which these means for incorporating air comprise the upper edge of said funnel shaped so as to form a cascade of liquid at the periphery of said funnel .
Ainsi, par exemple, l'invention concerne également un dispositif comprenant des fenêtres 21 , 22, mais pas de moyens statiques 31 de brassage par turbulence.Thus, for example, the invention also relates to a device comprising windows 21, 22, but no static means 31 for swirling by turbulence.
L'invention concerne également un dispositif présentant des moyens dynamiques de brassage du liquide situé dans la gaine, conformes par exemple à l'enseignement de la demande de brevet EP 0 687 497, mais ne comportant pas de moyens d'injection d'air sous pression, contrairement à ce qui est enseigné par cette demande.The invention also relates to a device having dynamic means for stirring the liquid located in the sheath, for example in accordance with the teaching of patent application EP 0 687 497, but not comprising means for injecting air under pressure, contrary to what is taught by this request.
On rappelle ici que ces moyens dynamiques de brassage peuvent comprendre un « arbre long », c'est-à-dire un arbre s'étendant sous l'hélice principale 13 à l'intérieur de la gaine 12 et pourvu de moyens pour brasser le liquide situé à l'intérieur de la gaine 12.It will be recalled here that these dynamic stirring means may comprise a "long shaft", that is to say a shaft extending under the main propeller 13 inside the sheath 12 and provided with means for brewing the liquid inside the sheath 12.
Le dispositif qui vient d'être décrit fonctionne de la manière suivante.The device which has just been described operates in the following manner.
Le liquide 3 à traiter est déversé par l'orifice 2 dans la cuve 1 jusqu'à un niveau situé au-dessus du bord supérieur de l'entonnoir 11 (voir Figures 1 et 3bis).The liquid 3 to be treated is poured through the orifice 2 into the tank 1 to a level located above the upper edge of the funnel 11 (see Figures 1 and 3a).
Ce liquide 3 se déverse également à l'intérieur de cet entonnoir 11.This liquid 3 also pours inside this funnel 11.
Le moto-réducteur 15 entraîne en rotation l'arbre 14 qui lui-même entraîne en rotation l'hélice principale 13.The gear motor 15 rotates the shaft 14 which itself rotates the main propeller 13.
La rotation de l'hélice principale 13 provoque une aspiration du liquide 3 dans la gaine 12 de sorte que ce liquide 3 circule en continu de haut en bas, dans cette gaine 12, puis passe dans l'espace 33 séparant l'extrémité inférieure de la gaine 12 du fond de la cuve 1 et circule de bas en haut entre la gaine 12 et la paroi interne de la cuve 1 et ainsi de suite.The rotation of the main propeller 13 causes a suction of the liquid 3 in the sheath 12 so that this liquid 3 circulates continuously from top to bottom, in this sheath 12, then passes into the space 33 separating the lower end of the sheath 12 from the bottom of the tank 1 and flows from bottom to top between the sheath 12 and the internal wall of the tank 1 and so on.
L'organe anti-vortex 16 empêche la rotation du liquide dans la gaine 12 au- dessous de l'hélice 13.The anti-vortex member 16 prevents rotation of the liquid in the sheath 12 below the propeller 13.
Du fait de la dépression provoquée par l'hélice 13, le niveau de liquide 3 à l'intérieur de l'entonnoir 11 se trouve au-dessous du niveau de liquide à l'intérieur de la cuve 1.Due to the depression caused by the propeller 13, the liquid level 3 inside the funnel 11 is below the liquid level inside the tank 1.
Grâce à la forme particulière de l'entonnoir 11 (voir ci-dessus : partie sensiblement conique 11b surmontée d'une partie sensiblement cylindrique 11c), il en résulte la formation d'une cascade de liquide 3 sur toute la périphérie de l'entonnoir 11 , laquelle cascade entraîne l'incorporation d'air 34 dans ce liquide.Thanks to the particular shape of the funnel 11 (see above: substantially conical part 11b surmounted by a substantially cylindrical part 11c), this results in the formation of a cascade of liquid 3 over the entire periphery of the funnel 11, which cascade causes the incorporation of air 34 in this liquid.
La présence des saillies 17 et/ou de l'organe annulaire 18 dans le premier mode de réalisation (voir Figures 1 et 3) permet d'augmenter l'efficacité de l'incorporation d'air dans le liquide 3 dans la région où ce liquide se déverse dans l'entonnoir 11.The presence of the projections 17 and / or of the annular member 18 in the first embodiment (see FIGS. 1 and 3) makes it possible to increase the efficiency of the incorporation of air into the liquid 3 in the region where this liquid spills into funnel 11.
En effet, les saillies 17 permettent de séparer le flux de liquide 3 en une pluralité de veines qui, en se rejoignant, emprisonnent naturellement de l'air.In fact, the projections 17 make it possible to separate the flow of liquid 3 into a plurality of veins which, on joining, naturally trap air.
Quant à l'organe annulaire 18, il permet en fait de créer une deuxième cascade contribuant à l'incorporation d'air. Dans le deuxième mode de réalisation (voir Figure 3bis), la dépression provoquée par l'hélice 13 a également pour effet de créer une cascade supplémentaire à l'intérieur de la gaine 12, laquelle contribue à l'incorporation d'air dans le liquide 3.As for the annular member 18, it in fact makes it possible to create a second cascade contributing to the incorporation of air. In the second embodiment (see Figure 3bis), the depression caused by the propeller 13 also has the effect of creating an additional cascade inside the sheath 12, which contributes to the incorporation of air into the liquid 3.
On notera que le tuyau de trop plein 27 permet de régler le niveau du liquide 3 à l'intérieur de l'entonnoir 11 de manière que ce niveau se trouve sensiblement à mi- hauteur des fenêtres 21.It will be noted that the overflow pipe 27 makes it possible to adjust the level of the liquid 3 inside the funnel 11 so that this level is located approximately halfway up the windows 21.
On notera également que les fenêtres 21 permettent d'absorber dans la gaine 12 la mousse 23 située à la surface du liquide 3, évitant ainsi que cette mousse ne s'envole et n'aille polluer l'environnement.It will also be noted that the windows 21 allow the foam 23 located on the surface of the liquid 3 to be absorbed in the sheath 12, thus preventing this foam from flying away and polluting the environment.
On notera encore qu'on peut régler le débit de liquide 3 en déplaçant les manchons 25 et 26 par rapport aux fenêtres 21 et 22.It will also be noted that the liquid flow rate 3 can be adjusted by moving the sleeves 25 and 26 relative to the windows 21 and 22.
Lors de la circulation du liquide 3 à l'intérieur de la gaine 12, les obstacles 32 créent, au-dessous de chacun de ceux-ci, un effet de turbulence, permettant de diviser les bulles d'air 34 en micro-bulles, ce qui favorise le processus de dégradation biologique, et ainsi le rendement du dispositif selon l'invention. Dans chacun des modes de réalisation sus-décrits, les bulles de gaz entre la paroi interne de la cuve 1 et la gaine 12 accélèrent la remontée du liquide, favorisant la circulation de ce liquide à l'intérieur de la cuve 1, ce qui permet d'améliorer le rendement.During the circulation of the liquid 3 inside the sheath 12, the obstacles 32 create, below each of these, a turbulence effect, making it possible to divide the air bubbles 34 into micro-bubbles, which promotes the process of biological degradation, and thus the yield of the device according to the invention. In each of the embodiments described above, the gas bubbles between the inner wall of the tank 1 and the sheath 12 accelerate the ascent of the liquid, promoting the circulation of this liquid inside the tank 1, which improves the yield.
Ainsi, le liquide à traiter passe plusieurs fois dans la gaine 12 et subit donc plusieurs traitements d'oxygénation.Thus, the liquid to be treated passes several times through the sheath 12 and therefore undergoes several oxygenation treatments.
A chaque passage, la cascade naissant sur le bord de l'entonnoir 11 et/ou les saillies 17 et/ou l'organe annulaire 18 (voir Figures 1 et 3) et/ou les fenêtres 21 (voirAt each passage, the cascade emerging on the edge of the funnel 11 and / or the projections 17 and / or the annular member 18 (see Figures 1 and 3) and / or the windows 21 (see
Figure 3bis) permettent d'incorporer de l'air dans le liquide 3 sous le seul effet de la mise en mouvement de ce liquide, cet air permettant de mettre en oeuvre le processus de dégradation biologique du liquide 3.FIG. 3a) make it possible to incorporate air into the liquid 3 under the sole effect of the movement of this liquid, this air making it possible to implement the process of biological degradation of the liquid 3.
On s'est rendu compte que cette incorporation d'air pouvait être suffisante pour traiter avec un rendement global satisfaisant notamment des liquides peu chargés en matières organiques dans des cuves de taille relativement petite, et qu'il n'était pas nécessaire d'avoir recours à un apport d'énergie supplémentaire, par exemple sous la forme d'injection d'air sous pression dans la gaine.It has been realized that this incorporation of air could be sufficient to treat with an overall satisfactory yield in particular of liquids with little organic matter in tanks of relatively small size, and that it was not necessary to have use of additional energy, for example in the form of injecting pressurized air into the duct.
Pour le traitement de liquides chargés et/ou pour des cuves de taille relativement grande, il est préférable d'utiliser une hélice principale 20 du type sus- décrit, c'est-à-dire à flux majoritairement axial.For the treatment of charged liquids and / or for tanks of relatively large size, it is preferable to use a main propeller 20 of the type described above, that is to say with mainly axial flow.
Avec une telle hélice en effet, on peut augmenter la hauteur de chute du liquide 3 dans l'entonnoir 11 et dans la gaine 12, et ainsi améliorer le processus d'incorporation d'air dans ce liquide.With such a propeller, in fact, it is possible to increase the height of fall of the liquid 3 in the funnel 11 and in the sheath 12, and thus improve the process of incorporating air into this liquid.
Il va également de soi qu'en combinant les différents moyens d'incorporation d'air sus-décrits, on augmente le rendement du dispositif.It also goes without saying that by combining the various means of incorporating air described above, the efficiency of the device is increased.
Le choix de la vitesse de rotation de l'hélice principale 20 permet d'adapter le régime du dispositif selon l'invention à la nature du liquide à traiter.The choice of the speed of rotation of the main propeller 20 makes it possible to adapt the speed of the device according to the invention to the nature of the liquid to be treated.
On va à présent passer en revue d'autres modes de réalisation comprenant des moyens contribuant à l'incorporation d'air dans le liquide 3 sous l'effet de la cascade formée à la périphérie de l'entonnoir 11.We will now review other embodiments comprising means contributing to the incorporation of air into the liquid 3 under the effect of the cascade formed at the periphery of the funnel 11.
Dans le troisième mode de réalisation représenté à la Figure 5, le dispositif comprend un second organe anti-vortex 40 disposé à l'intérieur de la gaine 12 et au- dessus de l'hélice principale 13.In the third embodiment shown in FIG. 5, the device comprises a second anti-vortex member 40 disposed inside the sheath 12 and above the main propeller 13.
Ce second organe anti-vortex 40 est formé par au moins deux plaques 40a verticales et prolongées chacune vers le haut par une nervure de renfort 41 s'étendant jusqu'à l'extrémité supérieure de ladite gaine 12. De préférence, le second organe anti-vortex 40 est formé par quatre plaques 40a verticales uniformément réparties à l'intérieur de la gaine 12 et prolongées chacune vers le haut par une nervure de renfort 41.This second anti-vortex member 40 is formed by at least two vertical plates 40a and each extended upwards by a reinforcing rib 41 extending to the upper end of said sheath 12. Preferably, the second anti-vortex member -vortex 40 is formed by four plates 40a vertical uniformly distributed inside the sheath 12 and each extended upwards by a reinforcing rib 41.
Le second organe anti-vortex 40 permet de créer un effort de friction sur le liquide 3, lequel effort engendre des remous facilitant l'incorporation d'air dans le liquide 3.The second anti-vortex member 40 makes it possible to create a friction force on the liquid 3, which force generates eddies facilitating the incorporation of air into the liquid 3.
Selon une variante représentée à la Figure 6, le dispositif comprend un accélérateur de liquide à l'intérieur de la gaine 12.According to a variant shown in FIG. 6, the device comprises a liquid accelerator inside the sheath 12.
Cet accélérateur de liquide est formé par une hélice secondaire 45 disposée au- dessus du second organe anti-vortex 40 et solidaire en rotation de l'arbre 14. L'hélice secondaire 45 a un pas orienté dans le même sens que le pas de l'hélice principale 13.This liquid accelerator is formed by a secondary propeller 45 disposed above the second anti-vortex member 40 and integral in rotation with the shaft 14. The secondary propeller 45 has a pitch oriented in the same direction as the pitch of the main propeller 13.
De plus, l'accélérateur de liquide comprend également un organe anti-vortex 46 disposé au-dessus de l'hélice secondaire 45 et à l'intérieur d'une cheminée cylindrique 47. La cheminée 47 est fixée sur le bord interne des nervures de renfort 41 de façon à ménager avec la gaine 12 et entre les nervures de renfort 41 des passages 48 pour le liquide.In addition, the liquid accelerator also comprises an anti-vortex member 46 disposed above the secondary propeller 45 and inside a cylindrical chimney 47. The chimney 47 is fixed to the internal edge of the ribs of reinforcement 41 so as to provide with the sheath 12 and between the reinforcement ribs 41 passages 48 for the liquid.
L'hélice secondaire 45, l'organe anti-vortex 46 et la cheminée 47 sont situés entre les deux séries de fenêtres 21 et 22 qui sont, dans cette variante, pourvues de manchons de réglage 25, 26.The secondary propeller 45, the anti-vortex member 46 and the chimney 47 are located between the two series of windows 21 and 22 which are, in this variant, provided with adjustment sleeves 25, 26.
La rotation de l'hélice principale 13 provoque une aspiration du liquide 3 dans la gaine 12 par les fenêtres 21 et 22 de telle sorte que ce liquide 3 circule en continu de haut en bas dans cette gaine 12.The rotation of the main propeller 13 causes a suction of the liquid 3 in the sheath 12 through the windows 21 and 22 so that this liquid 3 circulates continuously from top to bottom in this sheath 12.
De plus, du fait de la rotation de l'hélice secondaire 45, l'aspiration du liquide 3 dans la gaine 12 par les fenêtres 21 et 22 est accélérée et une partie du liquide remonte par les passages 48 ménagés entre la gaine 12 et la cheminée 47 ce qui accentue encore ce phénomène d'accélération du liquide à l'intérieur de ladite gaineIn addition, due to the rotation of the secondary propeller 45, the aspiration of the liquid 3 into the sheath 12 through the windows 21 and 22 is accelerated and part of the liquid rises through the passages 48 formed between the sheath 12 and the chimney 47 which further accentuates this phenomenon of acceleration of the liquid inside said sheath
12.12.
L'organe anti-vortex 46 empêche la rotation du liquide dans la cheminée 47. L'accélération et l'aspiration du liquide ont pour effet de soumettre celui-ci à d'importants remous favorisant l'incorporation d'air à ce liquide.The anti-vortex member 46 prevents the rotation of the liquid in the chimney 47. The acceleration and aspiration of the liquid have the effect of subjecting it to significant eddies promoting the incorporation of air into this liquid.
Cette variante convient notamment pour des produits qui sont particulièrement moussants.This variant is particularly suitable for products which are particularly foaming.
En effet, du fait de l'accélération de l'aspiration du liquide 3 à l'intérieur de la cheminée 47 et d'une recirculation d'une partie de ce liquide dans les passages 48, la mousse flottant à la surface du liquide 3 est aspirée à l'intérieur de ladite cheminée 47.Indeed, due to the acceleration of the suction of the liquid 3 inside the chimney 47 and a recirculation of part of this liquid in the passages 48, the foam floating on the surface of the liquid 3 is sucked inside said chimney 47.
Selon une variante représentée à la Figure 7, le dispositif comporte des moyens d'aération de la surface du liquide 3 à l'intérieur de la cuve 1.According to a variant shown in FIG. 7, the device comprises means for aerating the surface of the liquid 3 inside the tank 1.
Comme cela est représenté sur cette figure, les moyens d'aération de la surface du liquide 3 sont formés par une hélice secondaire 50 disposée au-dessus du second organe anti-vortex 40 et solidaire en rotation de l'arbre 14.As shown in this figure, the means for aeration of the surface of the liquid 3 are formed by a secondary propeller 50 disposed above the second anti-vortex member 40 and integral in rotation with the shaft 14.
Cette hélice secondaire 50 a un pas inversé par rapport au pas de l'hélice principale 13.This secondary propeller 50 has an inverted pitch with respect to the pitch of the main propeller 13.
Les moyens d'aération de la surface du liquide 3 comprennent également un organe anti-vortex 51 disposé au-dessus de l'hélice secondaire 50 et à l'intérieur d'une cheminée cylindrique 52.The means for aerating the surface of the liquid 3 also comprise an anti-vortex member 51 disposed above the secondary propeller 50 and inside a cylindrical chimney 52.
La cheminée 52 est fixée sur les bords internes des nervures de renfort 48 de façon à ménager avec la gaine 12 et lesdites nervures de renfort 48 des passages 55 pour le liquide 3. L'hélice secondaire 50 et l'organe anti-vortex 51 sont situés entre les deux séries de fenêtres 21 et 22 et la cheminée 52 s'étend sensiblement de la partie médiane de la première série de fenêtres 21 jusqu'au bord supérieur de la seconde série de fenêtres 22.The chimney 52 is fixed to the internal edges of the reinforcing ribs 48 so as to provide with the sheath 12 and said reinforcing ribs 48 passages 55 for the liquid 3. The secondary propeller 50 and the anti-vortex member 51 are situated between the two series of windows 21 and 22 and the chimney 52 extends substantially from the middle part of the first series of windows 21 to the upper edge of the second series of windows 22.
Un couvercle 53 est monté sur l'arbre 14 au-dessus du bord supérieur de la cheminée 52.A cover 53 is mounted on the shaft 14 above the upper edge of the chimney 52.
La position verticale du couvercle 53 est réglable de façon à ménager avec le bord supérieur de la cheminée 52 un passage 54 réglable.The vertical position of the cover 53 is adjustable so as to provide with the upper edge of the chimney 52 an adjustable passage 54.
La rotation de l'hélice principale 13 provoque une aspiration du liquide 3 par les fenêtres 21 et 22 de telle sorte que ce liquide 3 circule de bas en haut dans la gaine 12. Ainsi, une partie du liquide 3 est aspirée dans la gaine 12 par les fenêtres 22 et une autre partie du liquide 3 est aspirée par les fenêtres 21 et circule de haut en bas dans les passages 55 ménagés entre la cheminée 52 et la gaine 12.The rotation of the main propeller 13 causes a suction of the liquid 3 through the windows 21 and 22 so that this liquid 3 circulates from bottom to top in the sheath 12. Thus, part of the liquid 3 is drawn into the sheath 12 through the windows 22 and another part of the liquid 3 is sucked in through the windows 21 and flows from top to bottom in the passages 55 formed between the chimney 52 and the sheath 12.
De plus, compte tenu du pas de l'hélice secondaire 50 qui est inversé par rapport au pas de l'hélice principale 13, une partie du liquide est aspirée dans la cheminée 52 de bas en haut et est projetée dans l'air sur la surface du liquide 3 à l'intérieur de l'entonnoir 11 en passant par le passage 54.In addition, taking into account the pitch of the secondary propeller 50 which is reversed with respect to the pitch of the main propeller 13, part of the liquid is drawn into the chimney 52 from bottom to top and is projected into the air on the surface of the liquid 3 inside the funnel 11 passing through the passage 54.
Ainsi, la projection d'une partie du liquide permet d'incorporer de l'air à ce liquide et, par ailleurs, de diminuer la formation de mousse à la surface de ce liquide.Thus, the projection of part of the liquid makes it possible to incorporate air into this liquid and, moreover, to reduce the formation of foam on the surface of this liquid.
L'organe anti-vortex 51 empêche la rotation du liquide dans la cheminée 52 au- dessus de l'hélice secondaire 50. Dans cette variante également, le débit de liquide 3 dans la gaine 12 peut être réglé en déplaçant les manchons 25 et 26 par rapport aux fenêtres 21 et 22.The anti-vortex member 51 prevents the rotation of the liquid in the chimney 52 above the secondary propeller 50. Also in this variant, the liquid flow rate 3 in the sheath 12 can be adjusted by moving the sleeves 25 and 26 relative to the windows 21 and 22.
Selon un quatrième mode de réalisation représenté aux Figures 8 à 10, le dispositif selon l'invention comprend une pompe à vortex 60 d'aspiration de la surface du liquide à l'intérieur de la gaine 12.According to a fourth embodiment shown in FIGS. 8 to 10, the device according to the invention comprises a vortex pump 60 for suction from the surface of the liquid inside the sheath 12.
Cette pompe à vortex 60 est disposée au-dessus du second organe anti-vortex 40 et au niveau de la première série de fenêtres 21.This vortex pump 60 is arranged above the second anti-vortex member 40 and at the level of the first series of windows 21.
Cette pompe à vortex 60 est entraînée en rotation par l'arbre 14 et comprend, d'une part, un plateau circulaire 61 fixé sur cet arbre 14 et muni sur sa face supérieure de pales 62 radiales et verticales et, d'autre part, une cheminée 63 fixée sur le bord supérieur desdites pales 62.This vortex pump 60 is driven in rotation by the shaft 14 and comprises, on the one hand, a circular plate 61 fixed on this shaft 14 and provided on its upper face with radial and vertical blades 62 and, on the other hand, a chimney 63 fixed to the upper edge of said blades 62.
L'ensemble constitué par le plateau 61 , les pales 62 et la cheminée 63 est maintenu sur l'arbre 14 au moyen d'un manchon 61a dont la position verticale sur cet arbre 14 est réglable. Le manchon 61a est fixé sur ledit arbre 14 au moyen d'un organe constitué par exemple par une vis de fixation, non représentée.The assembly constituted by the plate 61, the blades 62 and the chimney 63 is held on the shaft 14 by means of a sleeve 61a whose vertical position on this shaft 14 is adjustable. The sleeve 61a is fixed to said shaft 14 by means of a member constituted for example by a fixing screw, not shown.
Comme représenté sur les Figures 8 et 9, le bord supérieur des pales 62 est équipé d'une couronne 64 s'étendant vers l'extérieur de la cheminée 63.As shown in FIGS. 8 and 9, the upper edge of the blades 62 is fitted with a crown 64 extending towards the outside of the chimney 63.
Cette cheminée 63 s'étend vers le haut de la cuve 1 sensiblement de la partie médiane de la première série de fenêtres 21 jusqu'au bord supérieur des pales 62.This chimney 63 extends upwards from the tank 1 substantially from the middle part of the first series of windows 21 to the upper edge of the blades 62.
Cette cheminée 63 ménage un passage interne 65 qui communique, à sa partie inférieure, avec l'intérieur de la gaine 12 par des passages annulaires 66 ménagés entre les pales 62 et entre la couronne 64 et le plateau 61.This chimney 63 provides an internal passage 65 which communicates, at its lower part, with the interior of the sheath 12 by annular passages 66 formed between the blades 62 and between the crown 64 and the plate 61.
De préférence, la cheminée 63 est conique et la conicité est dirigée vers la partie supérieure de la cuve 1, comme représentée à la Figure 9. Selon une variante, la cheminée 63 peut être cylindrique. Les pales 62 sont planes ou incurvées et sont, de préférence, au nombre de trois, régulièrement réparties sur le plateau 61 , ainsi que représenté à la Figure 10.Preferably, the chimney 63 is conical and the conicity is directed towards the upper part of the tank 1, as shown in FIG. 9. According to a variant, the chimney 63 can be cylindrical. The blades 62 are flat or curved and are preferably three in number, regularly distributed over the plate 61, as shown in FIG. 10.
La rotation de l'hélice principale 13 provoque une aspiration du liquide 3 dans la gaine 12 par les fenêtres 21 et 22 de telle sorte que ce liquide 3 circule en continu de haut en bas dans la gaine 12.The rotation of the main propeller 13 causes a suction of the liquid 3 in the sheath 12 through the windows 21 and 22 so that this liquid 3 circulates continuously from top to bottom in the sheath 12.
De plus, la rotation de la pompe à vortex 60 entraînée par l'arbre 14, c'est à dire la rotation de l'ensemble constitué par le plateau 61 , les pales 62 et la cheminée 63 provoque une aspiration de la surface du liquide 3 dans le passage 65 de telle sorte que ce liquide passe ensuite par les passages annulaires 66 et soit réinjecté dans la cuve 1.In addition, the rotation of the vortex pump 60 driven by the shaft 14, that is to say the rotation of the assembly constituted by the plate 61, the blades 62 and the chimney 63 causes suction of the surface of the liquid. 3 in the passage 65 so that this liquid then passes through the annular passages 66 and is reinjected into the tank 1.
Dans ce mode de réalisation, le réglage du débit de liquide par les manchons 25 et 26 à l'intérieur de la gaine 12 n'est pas nécessaire.In this embodiment, the adjustment of the liquid flow rate through the sleeves 25 and 26 inside the sheath 12 is not necessary.
Sous l'effet de la pompe à vortex 60, le liquide 3 est soumis à d'importants remous favorisant l'incorporation d'air à ce liquide.Under the effect of the vortex pump 60, the liquid 3 is subjected to significant eddies promoting the incorporation of air into this liquid.
Ce mode de réalisation convient particulièrement pour les produits très moussants du fait que la mousse flottant sur la surface du liquide 3 est aspirée par la pompe à vortex 60 ce qui permet d'éliminer rapidement et efficacement cette mousse.This embodiment is particularly suitable for very foaming products because the foam floating on the surface of the liquid 3 is sucked by the vortex pump 60 which allows this foam to be removed quickly and efficiently.
Selon un cinquième mode de réalisation représenté aux Figures 11 et 12, le dispositif selon l'invention comprend une hélice monocanal 70 d'aspiration du liquide 3 à l'intérieur de la gaine 12.According to a fifth embodiment shown in FIGS. 11 and 12, the device according to the invention comprises a single-channel propeller 70 for sucking the liquid 3 inside the sheath 12.
Cette hélice monocanal 70 est disposée au-dessus du second organe anti- vortex 40 et au niveau de la première série de fenêtres 21.This single-channel propeller 70 is disposed above the second anti-vortex member 40 and at the level of the first series of windows 21.
L'hélice monocanal 70 est entraînée en rotation par l'arbre 14 et comprend, d'une part, un plateau circulaire 71 fixé sur cet arbre 14 et disposé au-dessus du niveau du liquide 3 dans la cuve 1 et, d'autre part, à l'intérieur du liquide 3, une plaque verticaleThe single-channel propeller 70 is rotated by the shaft 14 and comprises, on the one hand, a circular plate 71 fixed on this shaft 14 and disposed above the level of the liquid 3 in the tank 1 and, on the other part, inside the liquid 3, a vertical plate
72 formant une spirale et fixée sur la face inférieure dudit plateau 71 autour de l'arbre72 forming a spiral and fixed on the underside of said plate 71 around the shaft
14.14.
Ainsi que représenté plus particulièrement à la Figure 12, la plaque 72 délimite une entrée latérale 73 du liquide s'étendant sur toute la hauteur de ladite plaque 72, un canal vertical 74 de circulation de ce liquide de haut en bas et une sortie inférieure 75 dudit liquide.As shown more particularly in FIG. 12, the plate 72 delimits a lateral inlet 73 for the liquid extending over the entire height of said plate 72, a vertical channel 74 for circulation of this liquid from top to bottom and a lower outlet 75 of said liquid.
L'ensemble constitué par le plateau 71 et la plaque verticale 72 est maintenu sur l'arbre 14 au moyen d'un manchon 71a dont la position verticale sur cet arbre 14 est réglable.The assembly constituted by the plate 71 and the vertical plate 72 is held on the shaft 14 by means of a sleeve 71a whose vertical position on this shaft 14 is adjustable.
A cet effet, le manchon 71a est fixé sur ledit arbre 14 au moyen d'un organe constitué par exemple par une vis de fixation, non représentée.To this end, the sleeve 71a is fixed to said shaft 14 by means of a member constituted for example by a fixing screw, not shown.
Le bord interne de la plaque verticale 72 comporte un déflecteur vertical 76 incliné en direction du centre de la spirale formée par ladite plaque 72. D'autre part, la distance séparant la plaque 72 et l'axe de l'arbre 14 diminue progressivement, ainsi que représenté à la Figure 12.The internal edge of the vertical plate 72 comprises a vertical deflector 76 inclined in the direction of the center of the spiral formed by said plate 72. On the other hand, the distance separating the plate 72 and the axis of the shaft 14 gradually decreases, as shown in Figure 12.
La rotation de l'hélice monocanal 70 entraînée par l'arbre 19, c'est à dire la rotation de l'ensemble constitué par le plateau 71 et la plaque 72 dans le sens indiqué par la flèche sur la Figure 12, provoque une aspiration du liquide à l'intérieur de ladite plaque 72 par l'entrée latérale 73. Ce liquide est brassé à l'intérieur du canal vertical 74 et circule dans ce canal 74 de haut en bas pour être évacué à l'intérieur de la gaine 12 par la sortie inférieure 75.The rotation of the single-channel propeller 70 driven by the shaft 19, that is to say the rotation of the assembly formed by the plate 71 and the plate 72 in the direction indicated by the arrow in Figure 12, causes suction liquid inside said plate 72 through the lateral inlet 73. This liquid is stirred inside the vertical channel 74 and circulates in this channel 74 from top to bottom to be evacuated inside the sheath 12 by the lower outlet 75.
Le déflecteur 76 améliore le brassage du liquide à l'intérieur du canal vertical 74 et évite un retour du liquide par l'entrée latérale 73. Le brassage effectué par l'hélice monocanal 70 favorise l'incorporation d'air au liquide 3.The deflector 76 improves the stirring of the liquid inside the vertical channel 74 and prevents a return of the liquid through the lateral inlet 73. The stirring carried out by the single-channel propeller 70 promotes the incorporation of air into the liquid 3.
Selon un sixième mode de réalisation représenté sur les Figures 13 et 14, le dispositif selon l'invention comprend une hélice bicanaux 80 d'aspiration du liquide 3 à l'intérieur de la gaine 12. Cette hélice bicanaux 80 est disposée au-dessus du second organe anti-vortexAccording to a sixth embodiment shown in Figures 13 and 14, the device according to the invention comprises a two-channel propeller 80 for sucking the liquid 3 inside the sheath 12. This two-channel propeller 80 is arranged above the second anti-vortex organ
40 et au niveau de la première série de fenêtres 21.40 and at the level of the first series of windows 21.
L'hélice bicanaux 80 est entraînée en rotation par l'arbre 14 et comprend, d'une part, un plateau circulaire 81 fixé sur cet arbre 14 et disposé au-dessus du niveau du liquide 3 dans la cuve 1 et, d'autre part, à l'intérieur du liquide 3, deux plaques verticales 82 et 83.The two-channel propeller 80 is driven in rotation by the shaft 14 and comprises, on the one hand, a circular plate 81 fixed on this shaft 14 and disposed above the level of the liquid 3 in the tank 1 and, on the other part, inside the liquid 3, two vertical plates 82 and 83.
Les plaques verticales 82 et 83 sont fixées sur la face inférieure du plateau 80 et ont chacune la forme de deux demi-coquilles qui sont opposées et décalées l'une par rapport à l'autre ainsi que représenté à la Figure 14.The vertical plates 82 and 83 are fixed on the underside of the plate 80 and each have the form of two half-shells which are opposite and offset with respect to each other as shown in FIG. 14.
Les deux plaques 82 et 83 délimitent deux entrées latérales 84 et 85 du liquide, deux canaux 86 et 87 de circulation de ces liquides de haut en bas et une sortie inférieure 88 dudit liquide.The two plates 82 and 83 delimit two lateral inlets 84 and 85 of the liquid, two channels 86 and 87 for circulation of these liquids from top to bottom and a lower outlet 88 of said liquid.
L'ensemble constitué par le plateau 81 et les plaques verticales 82 et 83 est maintenu sur l'arbre 14 au moyen d'un manchon 81a dont la position verticale sur cet arbre 14 est réglable. Le manchon 81a est fixé sur l'arbre 14 au moyen d'un organe constitué par exemple par une vis de fixation, non représentée.The assembly constituted by the plate 81 and the vertical plates 82 and 83 is held on the shaft 14 by means of a sleeve 81a whose vertical position on this shaft 14 is adjustable. The sleeve 81a is fixed to the shaft 14 by means of a member constituted for example by a fixing screw, not shown.
Comme représenté plus particulièrement à la Figure 14, le bord de chaque plaque 82 et 83 situé en regard du canal 86 ou 87 délimité par l'autre plaque comporte un déflecteur vertical, respectivement 89 et 90. La rotation de l'hélice bicanaux 80 entraînée par l'arbre 14, c'est à dire la rotation de l'ensemble constitué par le plateau 81 et les deux plaques verticales 82 et 83 dans le sens indiqué par la flèche sur la Figure 14 provoque une aspiration du liquide 3 par les fenêtres 21.As shown more particularly in FIG. 14, the edge of each plate 82 and 83 situated opposite the channel 86 or 87 delimited by the other plate comprises a vertical deflector, respectively 89 and 90. The rotation of the two-channel propeller 80 driven by the shaft 14, that is to say the rotation of the assembly constituted by the plate 81 and the two vertical plates 82 and 83 in the direction indicated by the arrow in Figure 14 causes a suction of the liquid 3 through the windows 21.
Ce liquide pénètre par les entrées latérales 84 et 85 et est brassé à l'intérieur des canaux 86 et 87 et circule de haut en bas à l'intérieur de ces canaux 86 et 87, puis est ensuite évacué dans la gaine 12 par la sortie inférieure 88.This liquid enters through the lateral inlets 84 and 85 and is stirred inside the channels 86 and 87 and flows from top to bottom inside these channels 86 and 87, then is then discharged into the sheath 12 through the lower outlet 88.
Les déflecteurs 89 et 90 augmentent le brassage du liquide à l'intérieur des canaux 86 et 87 et évitent que ce liquide reflue par les entrées latérales 84 et 85.The deflectors 89 and 90 increase the stirring of the liquid inside the channels 86 and 87 and prevent this liquid from flowing back through the lateral inlets 84 and 85.
Sous l'effet du brassage provoqué par l'hélice bicanaux 80, on favorise l'incorporation d'air dans le liquide 3.Under the effect of stirring caused by the two-channel propeller 80, the incorporation of air into the liquid is favored 3.
Dans ces deux derniers modes de réalisation, le réglage du débit de liquide par les manchons 25 et 26 de la gaine 12 n'est pas nécessaire et ces deux derniers modes de réalisation sont plus particulièrement utilisés dans le cas où le niveau de liquide à l'intérieur de la cuve 1 est variable. Pour améliorer le débit de l'hélice monocanal 70 ou de l'hélice bicanaux 80, une hélice de pompage, non représentée, peut être disposée sur l'arbre 14 au-dessous de l'hélice monocanal ou au-dessous de l'hélice bicanaux.In these latter two embodiments, the adjustment of the liquid flow rate through the sleeves 25 and 26 of the sheath 12 is not necessary and these latter two embodiments are more particularly used in the case where the liquid level at inside the tank 1 is variable. To improve the flow rate of the single-channel propeller 70 or the two-channel propeller 80, a pumping propeller, not shown, can be placed on the shaft 14 below the single-channel propeller or below the propeller dual-channel.
Le dispositif selon l'invention s'applique par exemple au traitement de l'eau, des effluents urbains, des eaux usées industrielles, des graisses par biodégradation, des matières de vidange, des déchets d'élevage et d'une manière générale à tous produits industriels biodégradables.The device according to the invention applies for example to the treatment of water, urban effluents, industrial waste water, grease by biodegradation, draining materials, livestock waste and in general to all biodegradable industrial products.
Bien entendu, la présente invention n'est pas limitée aux modes de réalisation décrits et représentés, fournis à titre d'exemple illustratif et non limitatif. Of course, the present invention is not limited to the embodiments described and shown, provided by way of illustrative and nonlimiting example.

Claims

/085502/ 085502
1616
REVENDICATIONS 1. Dispositif (10) pour brasser et aérer un liquide (3) dans une cuve de traitement (1), comprenant :CLAIMS 1. Device (10) for stirring and aerating a liquid (3) in a treatment tank (1), comprising:
- au moins un entonnoir (11) destiné à être disposé dans la partie supérieure de ladite cuve (1) en ménageant un passage (11a) avec cette cuve (1),- at least one funnel (11) intended to be placed in the upper part of said tank (1) by providing a passage (11a) with this tank (1),
- au moins une gaine (12) reliée audit entonnoir (11) et destinée à s'étendre en direction du fond de ladite cuve (1), ladite gaine (12) comportant au moins une ouverture (12a, 12b) dans chacune de ses parties supérieure et inférieure,- At least one sheath (12) connected to said funnel (11) and intended to extend towards the bottom of said tank (1), said sheath (12) comprising at least one opening (12a, 12b) in each of its upper and lower parts,
- au moins une hélice principale (13) située dans ladite gaine (12), - des moyens (14, 15) pour entraîner ladite hélice (13) en rotation, et- at least one main propeller (13) located in said sheath (12), - means (14, 15) for driving said propeller (13) in rotation, and
- des moyens (17, 18 ; 21 ; 40 ; 45, 46, 47 ; 50, 51 , 52 ; 60 ; 70 ; 80) pour incorporer de l'air audit liquide, ces moyens d'incorporation d'air étant constitués exclusivement de moyens adaptés pour incorporer audit liquide (3) de l'air à la pression atmosphérique sous le seul effet de la mise en mouvement dudit liquide (3) à l'intérieur dudit dispositif (10), caractérisé en ce que lesdits moyens d'incorporation d'air comprennent le bord supérieur dudit entonnoir (11), conformé de manière à former une cascade de liquide (3) à la périphérie dudit entonnoir (11).- means (17, 18; 21; 40; 45, 46, 47; 50, 51, 52; 60; 70; 80) for incorporating air into said liquid, these means for incorporating air being constituted exclusively means adapted to incorporate into said liquid (3) air at atmospheric pressure under the sole effect of the movement of said liquid (3) inside said device (10), characterized in that said means air incorporation comprise the upper edge of said funnel (11), shaped so as to form a cascade of liquid (3) at the periphery of said funnel (11).
2. Dispositif (10) selon la revendication 1 , caractérisé en ce que ledit entonnoir (11) comprend un fond sensiblement conique (11b) surmonté d'une ceinture sensiblement cylindrique (11c) définissant ledit bord.2. Device (10) according to claim 1, characterized in that said funnel (11) comprises a substantially conical bottom (11b) surmounted by a substantially cylindrical belt (11c) defining said edge.
3. Dispositif (10) selon l'une des revendications 1 ou 2, caractérisé en ce que lesdits moyens d'incorporation d'air comprennent une pluralité de saillies (17) réparties sur le bord supérieur dudit entonnoir (11). 3. Device (10) according to one of claims 1 or 2, characterized in that said air incorporation means comprise a plurality of projections (17) distributed over the upper edge of said funnel (11).
4. Dispositif (10) selon l'une quelconque des revendications 1 à 3, caractérisé en ce que lesdits moyens d'incorporation d'air comprennent un organe annulaire (18) s'étendant à l'intérieur dudit entonnoir (11).4. Device (10) according to any one of claims 1 to 3, characterized in that said air intake means comprise an annular member (18) extending inside said funnel (11).
5. Dispositif (10) selon la revendication 4, caractérisé en ce que ledit organe annulaire (18) est conformé en gouttière annulaire. 5. Device (10) according to claim 4, characterized in that said annular member (18) is shaped as an annular gutter.
6. Dispositif (10) selon la revendication 4, caractérisé en ce que ledit organe annulaire (18) est conformé en grille annulaire.6. Device (10) according to claim 4, characterized in that said annular member (18) is shaped as an annular grid.
7. Dispositif (10) selon l'une quelconque des revendications précédentes, caractérisé en que ladite gaine (12) s'étend jusqu'au-dessus du bord supérieur dudit entonnoir (11), et en ce que lesdits moyens d'incorporation d'air comprennent au moins une fenêtre (21) formée dans la partie supérieure de ladite gaine (12). 7. Device (10) according to any one of the preceding claims, characterized in that said sheath (12) extends up above the upper edge of said funnel (11), and in that said means for incorporating air include at least one window (21) formed in the upper part of said sheath (12).
8. Dispositif (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que lesdits moyens d'incorporation d'air comprennent des moyens anti-vortex (40) disposés à l'intérieur de ladite gaine (12) au-dessus de ladite hélice principale (13). 8. Device (10) according to any one of the preceding claims, characterized in that said means for incorporating air comprise anti-vortex means (40) arranged inside said sheath (12) above of said main propeller (13).
9. Dispositif (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que lesdits moyens d'incorporation d'air comprennent un accélérateur (45, 46, 47) de liquide (3) à l'intérieur de ladite gaine (12).9. Device (10) according to any one of the preceding claims, characterized in that the said air incorporation means comprise an accelerator (45, 46, 47) of liquid (3) inside the said sheath ( 12).
10. Dispositif (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que lesdits moyens d'incorporation d'air comprennent des moyens d'aération (50, 51 , 52) de la surface dudit liquide (3).10. Device (10) according to any one of the preceding claims, characterized in that said means for incorporating air comprise means for aerating (50, 51, 52) the surface of said liquid (3).
11. Dispositif (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que lesdits moyens d'incorporation d'air comprennent une pompe à vortex (60) à l'intérieur de ladite gaine (12).11. Device (10) according to any one of the preceding claims, characterized in that said air incorporation means comprise a vortex pump (60) inside said sheath (12).
12. Dispositif (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que lesdits moyens d'incorporation d'air comprennent une hélice monocanal (70) à l'intérieur de ladite gaine (12).12. Device (10) according to any one of the preceding claims, characterized in that said means for incorporating air comprise a single-channel propeller (70) inside said sheath (12).
13. Dispositif (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que lesdits moyens d'incorporation d'air comprennent une hélice bicanaux (80) à l'intérieur de ladite gaine (12). 13. Device (10) according to any one of the preceding claims, characterized in that the said air incorporation means comprise a two-channel propeller (80) inside the said sheath (12).
14. Dispositif (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que ladite hélice principale (13) est du type à flux majoritairement axial.14. Device (10) according to any one of the preceding claims, characterized in that said main propeller (13) is of the mainly axial flow type.
15. Dispositif (10) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend des moyens anti-vortex (40) disposés à l'intérieur de ladite gaine (12) au-dessous de ladite hélice principale (13).15. Device (10) according to any one of the preceding claims, characterized in that it comprises anti-vortex means (40) arranged inside said sheath (12) below said main propeller (13 ).
16. Dispositif (10) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend des moyens dynamiques de brassage.16. Device (10) according to any one of the preceding claims, characterized in that it comprises dynamic stirring means.
17. Dispositif (10) selon l'une quelconque des revendications 1 à 15, caractérisé en ce qu'il comprend des moyens statiques de brassage par turbulence (30) disposés à l'intérieur de ladite gaine (12).17. Device (10) according to any one of claims 1 to 15, characterized in that it comprises static turbulence stirring means (30) arranged inside said sheath (12).
18. Dispositif (10) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend des moyens pour aspirer à l'intérieur de ladite gaine (12) de la mousse (23) formée à la surface dudit liquide (3).18. Device (10) according to any one of the preceding claims, characterized in that it comprises means for sucking inside said sheath (12) foam (23) formed on the surface of said liquid (3 ).
19. Cuve (1) de traitement de liquide, caractérisée en ce qu'elle est équipée d'un dispositif (10) conforme à l'une quelconque des revendications précédentes. 19. Liquid treatment tank (1), characterized in that it is equipped with a device (10) according to any one of the preceding claims.
EP02727664A 2001-04-19 2002-04-17 Device for stirring and aerating a liquid in a treatment vessel Withdrawn EP1379325A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0105293 2001-04-19
FR0105293A FR2823743B1 (en) 2001-04-19 2001-04-19 DEVICE FOR BREWING AND AERATING A LIQUID IN A TREATMENT TANK
PCT/FR2002/001315 WO2002085502A1 (en) 2001-04-19 2002-04-17 Device for stirring and aerating a liquid in a treatment vessel

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EP1379325A1 true EP1379325A1 (en) 2004-01-14

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US (1) US20040130043A1 (en)
EP (1) EP1379325A1 (en)
JP (1) JP4532829B2 (en)
CN (1) CN1298415C (en)
CA (1) CA2443684C (en)
EE (1) EE05061B1 (en)
FR (1) FR2823743B1 (en)
IL (1) IL158483A0 (en)
NO (1) NO327915B1 (en)
RU (1) RU2292941C2 (en)
WO (1) WO2002085502A1 (en)

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US20040130043A1 (en) 2004-07-08
CA2443684A1 (en) 2002-10-31
RU2003133324A (en) 2005-04-10
NO327915B1 (en) 2009-10-19
EE200300516A (en) 2004-02-16
NO20034671L (en) 2003-10-17
FR2823743A1 (en) 2002-10-25
CN1298415C (en) 2007-02-07
IL158483A0 (en) 2004-05-12
CA2443684C (en) 2010-03-30
WO2002085502A1 (en) 2002-10-31
RU2292941C2 (en) 2007-02-10
NO20034671D0 (en) 2003-10-17
EE05061B1 (en) 2008-08-15
FR2823743B1 (en) 2004-03-12
JP2004528973A (en) 2004-09-24
JP4532829B2 (en) 2010-08-25
CN1503689A (en) 2004-06-09

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