EP0963243B1 - Dispositif de brassage de contenu d'une cuve comprenant un elevateur a bulles - Google Patents
Dispositif de brassage de contenu d'une cuve comprenant un elevateur a bulles Download PDFInfo
- Publication number
- EP0963243B1 EP0963243B1 EP98910820A EP98910820A EP0963243B1 EP 0963243 B1 EP0963243 B1 EP 0963243B1 EP 98910820 A EP98910820 A EP 98910820A EP 98910820 A EP98910820 A EP 98910820A EP 0963243 B1 EP0963243 B1 EP 0963243B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube
- liquid
- content
- stirring
- elevator
- 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
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/50—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/234—Surface aerating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/234—Surface aerating
- B01F23/2341—Surface aerating by cascading, spraying or projecting a liquid into a gaseous atmosphere
- B01F23/23413—Surface aerating by cascading, spraying or projecting a liquid into a gaseous atmosphere using nozzles for projecting the liquid into the gas atmosphere
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/20—Jet mixers, i.e. mixers using high-speed fluid streams
- B01F25/21—Jet mixers, i.e. mixers using high-speed fluid streams with submerged injectors, e.g. nozzles, for injecting high-pressure jets into a large volume or into mixing chambers
Definitions
- the invention relates to a device for mixing the contents of a tank.
- bubble elevator uses a device already used to this and commonly used especially in industry nuclear: it is called bubble elevator and consists of a generally vertical tube, open to its ends and which still includes an inlet nozzle air at an intermediate height. The end is always immersed in the liquid of the tank and corresponds to a liquid inlet opening, while the upper end can be emerged or submerged according to the circumstances and corresponds to a air and liquid mixture ejection opening: indeed, the air introduced into the tube by the tapping rises by carrying with it the liquid occupying the tube, until it comes out of the end the ejected liquid is replaced by liquid from the tank entering through the lower opening. Bubble elevators do not require the use of moving mechanical parts and can therefore be used even in corrosive liquids; they are very effective in stirring and homogenizing the liquid in tanks, in particular for resuspending deposits accumulated at the bottom of the tank.
- the performance of a bubble elevator can be defined as the quotient of the entrained liquid flow by the air flow supplied. We see that it is very variable and highly dependent on the submergence rate, either the ratio between the height separating the nozzle of air from the level of the tank liquid and the height, unchanging, between the air connection and the top of the elevator; the first of these heights corresponds actually the difference in level between the air intake and the free surface of the liquid. If the liquid is flush with height of the top of the elevator, this is fully submerged and the submergence rate is 100%; this rate decreases as the liquid drops in the tank.
- the subject of the invention is a bubble elevator which provides both good performance and possibility of auxiliary operation in tanks little filled. It can replace several elevators ordinary.
- This bubble elevator includes an open tube a lower liquid inlet end, at a upper end of gas mixture ejection and liquid and a gas injection nozzle at a intermediate height between the ends, and it distinguishes in that the tube still comprises at least an additional opening at a height intermediate between the upper end and the air injection nozzle. This new opening can be used to suck up an additional flow of liquid in certain circumstances or to eject on the contrary The mixture.
- a tube is generally connected to this opening.
- the bubble elevator in Figure 1 is shown housed in a tank 1 and includes a main tube 2 open at its lower end 3 and at its end upper 4 where, as usual, it is curved in butt shape to reject the gas mixture lift and horizontally driven liquid or even down.
- An intermediate opening corresponding to an air nozzle 5 is made at little height of the lower end 3; we connect a compressed air line 6 which supplies the mixing gas.
- the essential element of the invention consists of a additional opening 7 of the main tube 2, located between the tap 5 and the upper end 4 and at which can be connected to a connection tube 8 which from there horizontally or down, and opens in tank 1 below the end superior 4.
- connection tube 8 lends itself both when drawing the liquid from the tank and ejecting a mixture. It is worth mentioning previously certain geometric characteristics of the elevator and explain their interest. This is how as the main tube widens upward, passing with a diameter D1 on the side of the lower end 3 to a larger diameter D2 on the end side superior 4. The variation in diameter is located a little below the connection opening 7 and it is abrupt, but correct operation would be obtained with a gradual variation in diameter over a small height of the main tube 2.
- the elevation b a value of about 5 cm for a main tube 2, without notice air exhaust even by increasing the injection rate through the nozzle 5 until tripling.
- This possibility of reducing the difference in height b is beneficial because it increases the submergence rate of the elevator, all other things being equal, and therefore the extent of its operation in little tanks filled, since the submergence rate corresponding to the operating cut-off remains 1/3. Even when operation is possible with an air connection 5 high, its lowering increases the yield of the lift.
- the diameter D3 of the connection tube 8, its angle of inclination and its length are determined empirically.
- the diameter D3 must be smaller than the diameter D2, and the length smaller than that of the lower part (of diameter D1) of the main tube 2.
- Figure 2a illustrates a situation where the tank 1 is almost empty but where a homogenization of its content is still sought. Air is supplied at the desired rate and it entrains the liquid present in the bottom of tube 2 to connection opening 7 before discharging it through connection tube 8: on thus obtains an operation of the "first stage" of the elevator which only concerns its lower part, while the rest, between the opening of connection 7 and the upper end 4, consists of a "second floor” which remains entirely empty for this operating mode apart from an air leak rate, because its submergence is too low.
- connection tube 8 which becomes a suction tube for a liquid flow additional.
- Liquid aspiration at two altitudes further promotes significant mixing of the content of the tank, together with an increase in the flow of liquid entrained in the main tube 2.
- the opening connection 7 then optimizes the operation of the bubble elevator by allowing suction then to eject a greater flow of liquid than in an ordinary elevator, with identical air flow.
- Figure 3 shows that the orifice concept intermediate can be generalized to a forklift bubbles with more than two ejection stages: the elevator which is illustrated therein thus comprises a second orifice intermediate 17 above the first (referenced by 7 as in the previous example), and a second tube of connection 18 is connected to it. It is sloping down to tank 1 like the previous one, and its diameter D5 can be similar to the diameter D3 of the first connection tube 8 or slightly higher.
- the tube 2 then comprises three sections, of diameters D1, D2 and D4, which connect 7 and 17 with variations abrupt or progressive in diameter as previously.
- the mixture of air and liquid comes out of the elevator 7 and 17 or by the upper end 4 of the tube 2, or more of these places at once function of submergence and air flow, such as previously.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
Description
- la figure 1 représente un élévateur à bulles conforme à l'invention,
- les figures 2a à 2d illustrent plusieurs modes de fonctionnement qu'on peut distinguer,
- et la figure 3 représente un autre élévateur à bulles.
Claims (6)
- Dispositif de brassage du contenu liquide d'une cuve, comprenant au moins un élévateur à bulles comprenant un tube (2) ouvert à une extrémité inférieure (3) d'entrée du liquide, à une extrémité supérieure (4) d'éjection d'un mélange du liquide et de gaz et à un piquage (5) d'injection d'air à une hauteur intermédiaire entre les extrémités, caractérisé en ce que le tube (2) comprend encore une ouverture supplémentaire (7) à une hauteur intermédiaire entre. l'extrémité supérieure et le piquage d'injection d'air et par laquelle le liquide peut être aspiré dans le tube ou en être éjecté.
- Dispositif suivant la revendication 1, caractérisé en ce que le tube est composé d'une portion inférieure finissant un peu au-dessous de l'ouverture de raccordement et d'une portion supérieure de plus gros diamètre (D2) que la portion inférieure.
- Dispositif suivant la revendication 2, caractérisé en ce que les portions du tube se raccordent en une variation brusque de diamètre.
- Dispositif suivant 1a revendication 2, caractérisé en ce que les portions du tube se raccordent en une variation progressive de diamètre.
- Dispositif suivant la revendication 1, caractérisé en ce qu'un tube de branchement (8) est raccordé au tube (2) à l'ouverture supplémentaire (7), le tube de branchement débouchant au-dessous de l'extrémité supérieure (4).
- Dispositif suivant la revendication 1, caractérisé par au moins une seconde ouverture supplémentaire (17) à une hauteur intermédiaire entre l'extrémité supérieure (4) du tube (2) et 1e piquage (5) d'injection d'air, les ouvertures intermédiaires (7, 17) étant à des hauteurs différentes.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9702427A FR2760197B1 (fr) | 1997-02-28 | 1997-02-28 | Dispositif de brassage de contenu d'une cuve comprenant un elevateur a bulles |
FR9702427 | 1997-02-28 | ||
PCT/FR1998/000359 WO1998037956A1 (fr) | 1997-02-28 | 1998-02-24 | Dispositif de brassage de contenu d'une cuve comprenant un elevateur a bulles |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0963243A1 EP0963243A1 (fr) | 1999-12-15 |
EP0963243B1 true EP0963243B1 (fr) | 2002-07-31 |
Family
ID=9504300
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98910820A Expired - Lifetime EP0963243B1 (fr) | 1997-02-28 | 1998-02-24 | Dispositif de brassage de contenu d'une cuve comprenant un elevateur a bulles |
Country Status (7)
Country | Link |
---|---|
US (1) | US6237898B1 (fr) |
EP (1) | EP0963243B1 (fr) |
JP (1) | JP3727072B2 (fr) |
KR (1) | KR100501917B1 (fr) |
DE (1) | DE69806906T2 (fr) |
FR (1) | FR2760197B1 (fr) |
WO (1) | WO1998037956A1 (fr) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6322055B1 (en) * | 2000-10-02 | 2001-11-27 | Eco-Oxygen Technologies, Llc | Gas dissolving apparatus and method |
US7566397B2 (en) * | 2004-02-09 | 2009-07-28 | Eco Oxygen Technologies, Llc | Superoxygenation of raw wastewater for odor/corrosion control |
US7320749B2 (en) * | 2004-02-09 | 2008-01-22 | Eco-Oxygen Technologies, Llc | Method and apparatus for control of a gas or chemical |
US7267328B2 (en) * | 2004-04-22 | 2007-09-11 | Anthony John Witheridge | Aeration of wastewater ponds using airlift pumps |
US20080261299A1 (en) * | 2007-04-23 | 2008-10-23 | Zeikus J Gregory | Pneumatic Bioreactor |
US7628528B2 (en) * | 2005-10-26 | 2009-12-08 | PRS Biotech, Inc. | Pneumatic bioreactor |
US8790913B2 (en) * | 2005-10-26 | 2014-07-29 | Pbs Biotech, Inc. | Methods of using pneumatic bioreactors |
US7600741B2 (en) | 2006-02-07 | 2009-10-13 | Piotr Lipert | Gas bubble mixer |
DE102006044624B4 (de) * | 2006-09-19 | 2008-07-10 | Koch Membrane Systems Gmbh | Vorrichtung zur Begasung einer Flüssigkeit |
US7713730B2 (en) * | 2007-04-24 | 2010-05-11 | Pbs Biotech, Inc. | Pneumatic bioreactor |
US20090240640A1 (en) * | 2008-03-21 | 2009-09-24 | David Alan Blain | Apparatus and method for predicting engine test performance from bench test data |
EP2279240A2 (fr) * | 2008-04-25 | 2011-02-02 | PBS Biotech, Inc | Appareil de bioréacteur |
JP5296565B2 (ja) * | 2009-01-28 | 2013-09-25 | 株式会社 米崎 | 攪拌装置 |
DE102009013930B4 (de) | 2009-03-22 | 2011-05-05 | Stiftung Alfred-Wegener-Institut Für Polar- Und Meeresforschung | Einrichtung zum Rühren von Fluiden mittels Gasblasen |
US9469426B2 (en) | 2010-03-08 | 2016-10-18 | Therapeutic Proteins International, LLC | Single-use stationary bioreactors and mixing vessels |
DK3582883T3 (da) * | 2017-02-20 | 2021-08-09 | Oxymem Ltd | Indkapslingssystem til anvendelse med et membranmodul af en membranbeluftet biofilmsreaktor og omfattende et lavtryks-lufttransport-blandingssystem |
US11839830B2 (en) | 2022-01-22 | 2023-12-12 | Stallion Sport Limited | Portable electric foam maker |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1936308A (en) * | 1930-11-10 | 1933-11-21 | Mueller Wilhelm | Apparatus for mixing gaseous and liquid substances |
FR41531E (fr) * | 1932-03-08 | 1933-01-28 | Appareil à saturer de vapeur d'eau l'air soufflé par un ventilateur | |
US3840216A (en) * | 1972-10-26 | 1974-10-08 | Clark & Vicario Corp | Vacuum aeration of liquid waste effluent |
US3953003A (en) * | 1974-06-06 | 1976-04-27 | Aluterv Aluminiumipari Tervezo Vallalat | Tank provided with pneumatic mixing pipe |
US4187263A (en) * | 1979-01-15 | 1980-02-05 | Aero-Hydraulics Corporation | Liquid circulating device |
US4569757A (en) * | 1980-12-10 | 1986-02-11 | Champion International Corporation | Adapter skirt for static aerator mixer |
JPS5870895A (ja) * | 1981-10-26 | 1983-04-27 | Hisao Makino | 多段浄化方法および装置 |
US4439316A (en) * | 1982-06-14 | 1984-03-27 | Kaiyo Koggyo Co. Ltd. | Water purifier |
US4569804A (en) * | 1985-02-13 | 1986-02-11 | Atara Corporation | Large bubble flow generator-interface for liquid circulating device |
US4911838A (en) * | 1987-02-27 | 1990-03-27 | Kabushiki Kobe Seiko Sho | Pluri-tubular aerator |
US4789503A (en) * | 1987-06-15 | 1988-12-06 | Atara Corporation | Air removal snorkel device |
SU1527186A1 (ru) * | 1987-09-18 | 1989-12-07 | Научно-Исследовательский И Проектно-Конструкторский Институт Комплектно-Блочного Строительства | Аэратор-эрлифт |
US6017020A (en) * | 1990-02-01 | 2000-01-25 | Baughman; Michael L. | System and method for diffusing gas bubbles into a body of water |
US5755976A (en) * | 1996-11-13 | 1998-05-26 | Kortmann; Robert W. | Pneumatic bubble aeration reactor and method of using same |
-
1997
- 1997-02-28 FR FR9702427A patent/FR2760197B1/fr not_active Expired - Lifetime
-
1998
- 1998-02-24 EP EP98910820A patent/EP0963243B1/fr not_active Expired - Lifetime
- 1998-02-24 US US09/355,618 patent/US6237898B1/en not_active Expired - Lifetime
- 1998-02-24 WO PCT/FR1998/000359 patent/WO1998037956A1/fr active IP Right Grant
- 1998-02-24 DE DE69806906T patent/DE69806906T2/de not_active Expired - Lifetime
- 1998-02-24 JP JP53736998A patent/JP3727072B2/ja not_active Expired - Fee Related
- 1998-02-24 KR KR10-1999-7007860A patent/KR100501917B1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
US6237898B1 (en) | 2001-05-29 |
FR2760197A1 (fr) | 1998-09-04 |
KR100501917B1 (ko) | 2005-07-18 |
FR2760197B1 (fr) | 1999-03-26 |
EP0963243A1 (fr) | 1999-12-15 |
JP2001513018A (ja) | 2001-08-28 |
DE69806906T2 (de) | 2003-03-13 |
JP3727072B2 (ja) | 2005-12-14 |
DE69806906D1 (de) | 2002-09-05 |
WO1998037956A1 (fr) | 1998-09-03 |
KR20000075787A (ko) | 2000-12-26 |
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