EP1594598A1 - Vorrichtung zum rühren einer flüssigkeit und zum einspritzen eines gases in dieser flüssigkeit mit einer beschränkten sperrung - Google Patents

Vorrichtung zum rühren einer flüssigkeit und zum einspritzen eines gases in dieser flüssigkeit mit einer beschränkten sperrung

Info

Publication number
EP1594598A1
EP1594598A1 EP03799707A EP03799707A EP1594598A1 EP 1594598 A1 EP1594598 A1 EP 1594598A1 EP 03799707 A EP03799707 A EP 03799707A EP 03799707 A EP03799707 A EP 03799707A EP 1594598 A1 EP1594598 A1 EP 1594598A1
Authority
EP
European Patent Office
Prior art keywords
turbine
liquid
gas
axial flow
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.)
Granted
Application number
EP03799707A
Other languages
English (en)
French (fr)
Other versions
EP1594598B1 (de
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 a Directoire et Conseil de Surveillance 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 a Directoire et Conseil de Surveillance pour lEtude et lExploitation des Procedes Georges Claude filed Critical Institut National Polytechnique de Toulouse INPT
Publication of EP1594598A1 publication Critical patent/EP1594598A1/de
Application granted granted Critical
Publication of EP1594598B1 publication Critical patent/EP1594598B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2334—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements provided with stationary guiding means surrounding at least partially the stirrer
    • B01F23/23342—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
    • B01F27/19—Stirrers with two or more mixing elements mounted in sequence on the same axis
    • B01F27/192—Stirrers with two or more mixing elements mounted in sequence on the same axis with dissimilar elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—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 agitating a liquid in a reactor and for injecting a gas in this liquid, using a self-aspirating turbine.
  • Document EP-A1-0 995 485 describes a device for agitating a liquid in a reactor and for injecting a gas into this liquid.
  • This device comprises a motor for driving 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-aspirating turbine placed between the surface of the liquid and the propeller.
  • the self-aspirating turbine is connected to a source of gas, usually oxygenated gas, so that when driven by the motor shaft, it sucks both gas and the liquid in which it is immersed , thus forming a gas-liquid dispersion.
  • the gas-liquid dispersion generated by the self-aspirating turbine is directed towards the propeller using an annular box forming a deflector which envelops the self-aspirating turbine. It has been observed that, under certain conditions of use of this type of device of the prior art, the gas suction capacity in the turbine was limited due to the engorgement of gas of the volume defined by the turbine and the annular box.
  • the evacuation of the gas-liquid mixture from the annular box is difficult: on the one hand, there is no dispersion of the gas in the reactor, on the other hand, the gas present under the annular box attempts to s escape by the means of admission of the liquid into the turbine, which leads to an absence of transfer of the gas in the liquid and to a waste of the gas which rises to the surface without being used.
  • the object of the present invention is to provide a device of this type in which the gas suction capacity in the turbine is increased.
  • the invention relates to a device for agitating a liquid and injecting a gas into this liquid as defined above, in which the surface of the lower disc of the self-aspirating turbine is smaller. on the surface of the upper disc of said turbine.
  • FIGS. 1A and 1B are schematic views of a device according to the prior art
  • FIGS. 2 and 3 are schematic views of self-aspirating turbines usable in the device according to the invention
  • - Figure 4 shows the engorgement limit curves of different devices according to the invention and according to the prior art.
  • reactor means natural “basin” as well as “reservoir” with more or less close walls and with more or less closed skies.
  • the invention therefore relates to a device for agitating a liquid and injecting a gas into said liquid, comprising:
  • the output shaft being wrapped coaxially by a cylinder whose lower end opens into the self-aspirating turbine and whose upper end is linked in a manner tight to the drive device and is pierced with a gas injection opening in an annular interval delimited by the shaft and the cylinder, the turbine being made up of two superimposed discs and a set of radial blades disposed between the discs and fixed to them, the upper disc being pierced with a central hole into which penetrates the lower end of the cylinder which delimits with the edge of said hole an at least partially annular space through which liquid is drawn into the turbine, - means for directing towards the mobile with axial flow the gas-liquid dispersion expelled radially by the turbine, and in which the surface of the lower disc of the turbine e self-suction is less than the surface of the upper disc of said turbine.
  • FIGS 1A and 1B are used 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 (L), provided with a rotary outlet shaft (2) extending vertically and partially immersed in the liquid (L).
  • the shaft (2) carries at its lower end (3) a mobile with axial flow, preferably a propeller (4), immersed in the liquid.
  • the shaft (2) also carries, arranged between the propeller (4) and the surface of the liquid (L), a self-aspirating 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) linked at its upper end (6b) to the drive device (1), with the interposition of a sealing device (7), and of which l 'lower end (6a) opens into the turbine (5) coaxially with the shaft (2).
  • a sealing device (7) In the upper end of the cylinder (6) is pierced 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-aspirating turbine (5) consists of two discs (8, 9) placed horizontally, and a set of radial vanes (11), placed between the discs (8, 9) and fixed to them.
  • the essential characteristic of the invention derives from the nature of the self-aspirating turbine used.
  • the surface of the lower disc (9) of the self-aspirating turbine (5) must be less than the surface of the upper disc (9) of said turbine. This characteristic can be obtained by the use of different types of turbine.
  • the lower disc (9) of the self-aspirating turbine (5) may have a diameter less than the diameter of the upper disc (8).
  • the diameter of the lower disc (9) is at least greater than or equal to the diameter of the at least partially annular space (13) through which the liquid is drawn into the turbine.
  • This type of turbine is illustrated in FIG. 2.
  • the lower disc (8) is at least partially hollowed out.
  • hollow out is meant removing part of the disc.
  • the lower disc (8) can be, for example, at least partially hollowed out in the form of a ring, that is to say a form of ring is removed from the lower disc.
  • FIG. 3 A turbine can also be used in which the entire center of the lower disc has been removed except for an outer ring. In the latter case, the lower disc is only composed of a metal crown.
  • the output shaft (2) passes axially through the discs (8, 9) of the turbine (5) while being fixed to the lower disc (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 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 box (16) forming a deflector, enveloping the turbine (5) and profiled in order to direct towards the mobile with axial flow (4) a flow coming radially from the turbine, pierced with two openings superimposed central units (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-aspirating turbine (5).
  • the means for directing the gas-liquid dispersion towards the propeller (4) may also comprise a set of substantially vertical plates (19), forming counterblades, arranged radially around the deflector box (16) and fixed to it .
  • each counterblade (19) penetrates radially inside the deflector box (16), to which it is fixed by suitable means, for example welding or riveting.
  • the counter blades (19) can be arranged around the self-aspirating turbine (5) and the propeller (4) in an appropriate number at determined angular intervals.
  • a notch (21) In the inner edge of each counterblade (19) is formed, at the level of the propeller (4), a notch (21) into which the blades of the propeller blades (4) can penetrate.
  • a device according to the invention makes it possible to push the congestion limit of a device of the same type according to the prior art.
  • a device according to the invention operates normally and will make it possible to inject the gas into the liquid and to stir the liquid, under conditions where the device according to the prior art is clogged with it.
  • An advantage of the device according to the invention is that at identical powers, the device according to the invention makes it possible to increase the flow rate of gas injected into the liquid compared 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 stirring mobile is placed on the output shaft below the self-aspirating turbine, unlike the optimized version of the device according to the prior art.
  • FIG. 1 Devices as described in FIG. 1 have been equipped with different types of self-aspirating turbine.
  • a first series of turbine 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.
  • Impeller Disc diameter Lower upper disc diameter
  • the gas used is air at a pressure of 2 bar absolute.
  • the detection of engorgement is done visually by observing, on the one hand, the stopping of the dispersion of the gas in the reactor and, on the other hand, by the evacuation of the gas by the means of admission of the liquid in the turbine (annular space 13).
  • the curve of FIG. 4 represents for each device of FIG. 1 equipped with the turbines 0, 1, 2, 3 and 4 the gas flow rates (Q in l / h) observed during blockage for different values of rotation speed ( N in min "1 ). It can be seen that at identical speed, the congestion of the devices implementing the turbines 1 to 4 is obtained for much higher gas flow rates than for the device implementing the turbine 0.
  • N in min "1 ) the congestion of the devices implementing the turbines 1 to 4 is obtained for much higher gas flow rates than for the device implementing the turbine 0.
  • the depressions were characterized by the measurement of the Euler number and are collated in table 2. The Euler number reflects the capacity of the device to induce gas in the turbine: the higher it is, the more the turbine creates a depression important in the cylinder (6).
  • the device according to the invention equipped with the Turbine 1 makes it possible to push the congestion limit significantly, it has a low Euler number and therefore a low gas induction capacity.
  • the devices according to the invention equipped with Turbines 2 to 4 have a satisfactory Euler number while pushing the congestion 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 Vorrichtung zum rühren einer flüssigkeit und zum einspritzen eines gases in diese flüssigkeit mit einer beschränkten sperrung Expired - Lifetime EP1594598B1 (de)

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 true EP1594598A1 (de) 2005-11-16
EP1594598B1 EP1594598B1 (de) 2007-10-31

Family

ID=32338728

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03799707A Expired - Lifetime EP1594598B1 (de) 2002-12-12 2003-12-04 Vorrichtung zum rühren einer flüssigkeit und zum einspritzen eines gases in diese flüssigkeit mit einer beschränkten sperrung

Country Status (14)

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

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

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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
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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
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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
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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
EP1594598B1 (de) 2007-10-31
DK1594598T3 (da) 2008-02-11
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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