EP1594598B1 - Dispositif d'agitation d'un liquide et d'injection d'un gaz dans ce liquide a engorgement limite - Google Patents

Dispositif d'agitation d'un liquide et d'injection d'un gaz dans ce liquide a engorgement limite Download PDF

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Publication number
EP1594598B1
EP1594598B1 EP03799707A EP03799707A EP1594598B1 EP 1594598 B1 EP1594598 B1 EP 1594598B1 EP 03799707 A EP03799707 A EP 03799707A EP 03799707 A EP03799707 A EP 03799707A EP 1594598 B1 EP1594598 B1 EP 1594598B1
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EP
European Patent Office
Prior art keywords
turbine
liquid
gas
impeller
cylinder
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.)
Expired - Lifetime
Application number
EP03799707A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1594598A1 (fr
Inventor
Stéphane Melen
Martine Poux
Catherine Xuereb
Rodolphe Sardeing
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.)
Institut National Polytechnique de Toulouse INPT
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
Institut National Polytechnique de Toulouse INPT
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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 Institut National Polytechnique de Toulouse INPT, Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical Institut National Polytechnique de Toulouse INPT
Publication of EP1594598A1 publication Critical patent/EP1594598A1/fr
Application granted granted Critical
Publication of EP1594598B1 publication Critical patent/EP1594598B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/19—Stirrers with two or more mixing elements mounted in sequence on the same axis
    • B01F27/192—Stirrers with two or more mixing elements mounted in sequence on the same axis with dissimilar elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2334—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements provided with stationary guiding means surrounding at least partially the stirrer
    • B01F23/23342—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements provided with stationary guiding means surrounding at least partially the stirrer the stirrer being of the centrifugal type, e.g. with a surrounding stator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/111—Centrifugal stirrers, i.e. stirrers with radial outlets; Stirrers of the turbine type, e.g. with means to guide the flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/113—Propeller-shaped stirrers for producing an axial flow, e.g. shaped like a ship or aircraft propeller

Definitions

  • the present invention relates to a device for stirring a liquid in a reactor and injecting a gas into the liquid, using a self-suction turbine.
  • the document EP-A1-0 995 485 discloses a device for stirring a liquid in a reactor and injecting a gas into the liquid according to the preamble of claim 1.
  • This device comprises a drive motor of a vertical shaft disposed above the reactor.
  • the motor shaft carries and drives at its lower end a propeller immersed in the liquid; it also carries and drives a self-suction turbine placed between the surface of the liquid and the propeller.
  • the self-suction turbine is connected to a source of gas, generally an oxygenated gas, so that when it is driven by the motor shaft, it sucks both gas and liquid in which it is immersed thus forming a gas-liquid dispersion.
  • the gas-liquid dispersion generated by the self-suction turbine is directed towards the propeller by means of an annular baffle box which envelops the self-suction turbine.
  • the object of the present invention is to provide a device of this type according to claim 1 wherein the suction capacity of the gas in the turbine is increased.
  • the invention relates to a device for stirring a liquid and injecting a gas into the liquid as defined above, in which the surface of the lower disk of the self-suction turbine is lower than on the surface of the upper disk of said turbine.
  • reactor means "basin” natural and “reservoir” walls more or less close and more or less closed sky.
  • FIGS. 1A and 1B make it possible to characterize the device according to the prior art and which is improved by the present invention.
  • the device according to the invention comprises a drive device (1), for example a motor, arranged above the surface of the liquid, provided with a rotary output shaft (2) extending vertically and partially immersed in the liquid.
  • the shaft (2) carries at its lower end (3) a mobile axial flow, preferably a propeller (4), immersed in the liquid.
  • the shaft (2) also carries, arranged between the impeller (4) and the surface of the liquid, a self-suction turbine (5) which is consequently immersed in the reactor and is driven by the output shaft (2) at the same speed as the propeller (4).
  • the output shaft (2) is coaxially wrapped by a cylinder (6) connected at its upper end to the driving device (1), with the interposition of a sealing device (7), and whose lower end (6a) opens into the turbine (5) coaxially with the shaft (2).
  • a cylinder (6) connected at its upper end to the driving device (1), with the interposition of a sealing device (7), and whose lower end (6a) opens into the turbine (5) coaxially with the shaft (2).
  • an opening (14) for injecting a gas into the annular gap (15) delimited by the shaft (2) and by the cylinder (6).
  • the gas injection system in the orifice (14) is not shown.
  • the self-suction turbine (5) consists of two horizontally placed discs (8, 9) and a set of radial blades (11) placed between the discs (8, 9) and fixed thereto.
  • the essential characteristic of the invention lies in the nature of the self-suction turbine used. According to the invention, the surface of the lower disk (9) of the self-suction turbine (5) must be smaller than the surface of the upper disk (9) of said turbine. This characteristic can be obtained by the implementation of different types of turbine.
  • the lower disk (9) of the self-suction turbine (5) may have a smaller diameter than the diameter of the upper disk (8).
  • the diameter of the lower disk (9) is at least greater than or equal to the diameter of the at least partially annular space (13) through which the liquid is sucked into the turbine. This type of turbine is illustrated in FIG.
  • the lower disk (8) is at least partially hollowed out.
  • hollow out is meant to remove a part of the disk.
  • the lower disk (8) can be, for example, at least partially hollowed out in the form of a ring, that is to say that a ring shape is removed from the lower disk.
  • This type of turbine is illustrated in FIG. 3. It is also possible to use a turbine in which the entire center of the lower disk has been removed, except for an outer ring. In the latter case, the lower disk is composed only of a metal crown. It is also possible to use a turbine in which at least one angular sector has been removed, preferably several angular sectors distributed symmetrically.
  • the output shaft (2) passes axially through the disks (8, 9) of the turbine (5) and is fixed to the lower disk (9), so that when the drive device (1) is actuated, the shaft (2) drives the turbine (5) and the axial flow mobile (4) in rotation at the same speed.
  • the rotation of the turbine (5) creates the suction of the gas arriving through the orifice (14), via the cylinder (6), as well as the suction of a part of the liquid which is introduced by the annular gap (13) left free between the turbine (5) and the cylinder (6).
  • the device according to the invention comprises means for directing towards the propeller (4) the gas-liquid dispersion expelled radially by the turbine (5) between its blades (11).
  • these means may comprise an annular casing (16) forming a deflector, enveloping the turbine (5) and profiled in order to direct towards the mobile axial flow (4) a stream radially from the turbine, pierced with two openings central superimposed (17, 18) coaxial with the shaft (2).
  • the diameter of the lower opening (18) is greater than the diameter of the upper opening (17) and substantially equal to the diameter of the upper disc of the self-suction turbine (5).
  • the means for directing towards the propeller (4) the gas-liquid dispersion can also comprise a set of plates (19) substantially vertical, forming counter-blades, arranged radially around the baffle box (16) and fixed thereto .
  • each counter-blade (19) penetrates radially inside the baffle box (16), to which it is fixed by appropriate means, for example welding or riveting.
  • the counter-blades (19) can be arranged around the self-suction turbine (5) and the helix (4) in appropriate number at defined angular intervals.
  • a notch (21) in which may penetrate the ends of the blades of the propeller (4).
  • a device according to the invention makes it possible to push back the limit of clogging of a device of the same type according to the prior art.
  • a device according to the invention operates normally and will inject the gas into the liquid and stir the liquid, under conditions where the device according to the prior art is clogged.
  • An advantage of the device according to the invention is that with identical powers, the device according to the invention makes it possible to increase the flow rate of gas injected into the liquid with respect to the device according to the prior art. This increase is at least 30%.
  • the device according to the invention has a simplified operation compared to the device of the prior art.
  • no additional agitation mobile is placed on the output shaft below the self-suction turbine, unlike the optimized version of the device according to the prior art.
  • a first turbine series tested corresponds to the implementation of the first variant of the invention (surface of the lower disk of the turbine lower than the surface of the upper disk of the turbine).
  • the characteristics of these different turbines according to the first variant are defined in Table 1 below.
  • Table 1 Turbine Diameter of the upper disk Lower disc diameter Turbine 0 (prior art) 80 mm 80 mm Turbine 1 80 mm 0 Turbine 2 80 mm 50 mm Turbine 3 80 mm 60 mm
  • Turbine 4 has discs of diameter 80 mm and in its lower disc, was removed a ring 5 mm wide from a distance of 25 mm from the center of the disc.
  • the gas engorgement of the stirring devices according to FIG. 1 equipped by the different turbines 1 to 4 was compared with the clogging of the device according to the prior art equipped with the turbine 0 and an additional agitation device. placed on the output shaft below the turbine 0.
  • the gas flow rate in the device was increased while keeping the speed of the constant drive device.
  • the gas used is air at a pressure of 2 bar absolute. The detection of the clogging is done visually by observation, on the one hand, of the stop of the dispersion of the gas in the reactor and, on the other hand, of the evacuation of the gas by the liquid admission means in the turbine (annular space 13).
  • the curve of FIG. 4 represents for each device of FIG. 1 equipped with turbines 0, 1, 2, 3 and 4 the gas flow rates (Q in l / h) observed at the waterlogging for different values of rotation speed ( N in min -1 ). It is noted that at identical speed, the clogging of the devices implementing the turbines 1 to 4 is obtained for much higher gas flow rates than for the device using the turbine 0.
  • the depressions generated by each of these turbines in the cylinder (6) surrounding the shaft (2) and in which the gas circulates were also calculated.
  • the depressions were characterized by the measurement of the number of Euler and are collected in Table 2.
  • the number of Euler translates the capacity of the device to induce the gas in the turbine: the higher it is, the more the turbine creates a depression important in the cylinder (6).
  • Table 2 Turbine Number of Euler Eu Turbine 0 (prior art) 4.71 Turbine 1 1.30 Turbine 2 3.14 Turbine 3 3.97 Turbine 4 4.09
  • the device according to the invention equipped with Turbine 1 makes it possible to push back the waterlogging limit significantly, it has a low Euler number and thus a low gas induction capacity.
  • the devices according to the invention equipped with Turbines 2 to 4 have a satisfactory Euler number while pushing back the clogging limits of the device according to the prior art (Turbine 0).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
  • Accessories For Mixers (AREA)
  • Gas Separation By Absorption (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Nozzles (AREA)
EP03799707A 2002-12-12 2003-12-04 Dispositif d'agitation d'un liquide et d'injection d'un gaz dans ce liquide a engorgement limite Expired - Lifetime EP1594598B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0215733 2002-12-12
FR0215733A FR2848472B1 (fr) 2002-12-12 2002-12-12 Dispositif d'agitation d'un liquide et d'injection d'un gaz dans ce liquide a engorgement limite
PCT/FR2003/050151 WO2004054694A1 (fr) 2002-12-12 2003-12-04 Dispositif d’agitation d’un liquide et d’injection d’un gaz dans ce liquide a engorgement limite

Publications (2)

Publication Number Publication Date
EP1594598A1 EP1594598A1 (fr) 2005-11-16
EP1594598B1 true EP1594598B1 (fr) 2007-10-31

Family

ID=32338728

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03799707A Expired - Lifetime EP1594598B1 (fr) 2002-12-12 2003-12-04 Dispositif d'agitation d'un liquide et d'injection d'un gaz dans ce liquide a engorgement limite

Country Status (14)

Country Link
US (1) US7431272B2 (da)
EP (1) EP1594598B1 (da)
JP (1) JP4373336B2 (da)
CN (1) CN100344355C (da)
AT (1) ATE376875T1 (da)
AU (1) AU2003299411B2 (da)
BR (1) BR0317264B1 (da)
CA (1) CA2508429C (da)
DE (1) DE60317241T2 (da)
DK (1) DK1594598T3 (da)
ES (1) ES2295689T3 (da)
FR (1) FR2848472B1 (da)
PT (1) PT1594598E (da)
WO (1) WO2004054694A1 (da)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2884442B1 (fr) * 2005-04-19 2007-05-25 Air Liquide Dispositif d'agitation d'un liquide et d'injection d'un gaz dans ce liquide adapte a des bassins de faibles profondeurs
US8172206B2 (en) * 2008-05-23 2012-05-08 St Lawrence Thomas System for forming mini microbubbles
CN102861548B (zh) * 2010-09-20 2014-01-15 浙江诚信医化设备有限公司 搅拌式反应釜
CN102527312B (zh) * 2010-12-29 2013-09-04 万华化学集团股份有限公司 一种快速混合反应器及其应用
CN102614794B (zh) * 2012-03-25 2015-01-07 浙江长城减速机有限公司 齿盘涡轮导流搅拌器
CN104307455B (zh) * 2014-10-28 2015-12-09 成都冠禹科技有限公司 一种适用于化工及医药料液的工业反应釜
JP6537318B2 (ja) * 2015-03-30 2019-07-03 株式会社住化分析センター 気液処理装置
US10683221B2 (en) 2017-12-14 2020-06-16 L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Gas injection and recycling apparatus and methods
DE102019101416B4 (de) * 2018-12-03 2020-07-16 Invent Umwelt- Und Verfahrenstechnik Ag Hyperboloid-Rührkörper zum Umwälzen von Flüssigkeiten sowie Rühr- und Begasungseinrichtung
US11406943B1 (en) * 2019-06-14 2022-08-09 Aeration Industries International, Llc Apparatus for treating fluids having improved aeration efficiency and dual function operation
KR102666608B1 (ko) * 2022-11-03 2024-05-16 주식회사 하도 반응 가속화 장치
CN116550225B (zh) * 2023-07-11 2023-09-01 天津市英创技术有限公司 一种宠物食品生产加工用混料装置

Family Cites Families (13)

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US3067988A (en) * 1958-04-30 1962-12-11 Penarroya Miniere Metall Flotation with mechanical agitation
DE1189952B (de) * 1959-06-30 1965-04-01 Basf Ag Vorrichtung zum Begasen von Fluessigkeiten in einem Druckbehaelter
US3490996A (en) * 1968-04-10 1970-01-20 Herbert C Kelly Jr Solar heated water vapor lifting and condensing system
DE2404032C3 (de) * 1974-01-29 1979-07-05 Kloeckner-Humboldt-Deutz Ag, 5000 Koeln Rührwerksflotationszelle zur Aufbereitung von Mineralien und Kohlen
DE2823801A1 (de) * 1977-06-23 1979-01-18 Makoto Naito Vorrichtung zum verteilen von gas in form von feinen gasblaeschen in einer fluessigkeit
US4454078A (en) * 1980-11-10 1984-06-12 General Signal Corporation Mixing systems having agitators for mixing gas with liquid
FR2732236B1 (fr) * 1995-04-03 1997-06-06 Roland Jean Louis Dispositif pour introduire un gaz dans un liquide
DE29506955U1 (de) * 1995-04-28 1995-06-29 Charatjan Manuela Dipl Ing Vorrichtung zum Rühren bzw. zum Rühren und gleichzeitigen Begasen von Flüssigkeiten, Suspensionen und heterogenen Fluiden
US5660766A (en) * 1995-09-22 1997-08-26 Van Dyek; Bernhard Aerator
FR2784311B1 (fr) * 1998-10-09 2000-12-08 Air Liquide Dispositif d'agitation d'un liquide dans un reacteur et d'injection d'un gaz dans ce liquide
US6109449A (en) * 1998-11-04 2000-08-29 General Signal Corporation Mixing system for separation of materials by flotation
SE513821C2 (sv) * 1999-01-15 2000-11-13 Gefle Virvelteknik Ab Omrörare och förfarande för behandling av förorenade medier
FI109181B (fi) * 2000-07-21 2002-06-14 Outokumpu Oy Vaahdotusmekanismi ja menetelmä kaasun dispergoimiseksi ja virtauksen hallitsemiseksi vaahdotuskennossa

Also Published As

Publication number Publication date
CN100344355C (zh) 2007-10-24
AU2003299411B2 (en) 2009-01-29
ES2295689T3 (es) 2008-04-16
ATE376875T1 (de) 2007-11-15
AU2003299411A1 (en) 2004-07-09
JP2006509625A (ja) 2006-03-23
CN1729045A (zh) 2006-02-01
CA2508429C (fr) 2011-05-10
PT1594598E (pt) 2008-01-24
FR2848472A1 (fr) 2004-06-18
US20060151897A1 (en) 2006-07-13
US7431272B2 (en) 2008-10-07
DE60317241T2 (de) 2008-08-14
WO2004054694A1 (fr) 2004-07-01
FR2848472B1 (fr) 2005-02-18
DK1594598T3 (da) 2008-02-11
EP1594598A1 (fr) 2005-11-16
BR0317264A (pt) 2006-01-17
CA2508429A1 (fr) 2004-07-01
JP4373336B2 (ja) 2009-11-25
BR0317264B1 (pt) 2010-11-30
DE60317241D1 (de) 2007-12-13

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