EP0252903B1 - Procede et appareil pour acheminer du gaz ou un melange de gaz dans un liquide - Google Patents

Procede et appareil pour acheminer du gaz ou un melange de gaz dans un liquide Download PDF

Info

Publication number
EP0252903B1
EP0252903B1 EP85904821A EP85904821A EP0252903B1 EP 0252903 B1 EP0252903 B1 EP 0252903B1 EP 85904821 A EP85904821 A EP 85904821A EP 85904821 A EP85904821 A EP 85904821A EP 0252903 B1 EP0252903 B1 EP 0252903B1
Authority
EP
European Patent Office
Prior art keywords
liquid
tube
gas
impeller
baffles
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
Application number
EP85904821A
Other languages
German (de)
English (en)
Other versions
EP0252903A1 (fr
Inventor
Markus Sivonen
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.)
PLANSELL Oy
Original Assignee
PLANSELL Oy
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 PLANSELL Oy filed Critical PLANSELL Oy
Priority to AT85904821T priority Critical patent/ATE50925T1/de
Publication of EP0252903A1 publication Critical patent/EP0252903A1/fr
Application granted granted Critical
Publication of EP0252903B1 publication Critical patent/EP0252903B1/fr
Expired legal-status Critical Current

Links

Images

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
    • B01F23/2335—Mixing 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 direction of introduction of the gas relative to the stirrer
    • B01F23/23354—Mixing 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 direction of introduction of the gas relative to the stirrer the gas being driven away from the rotating stirrer
    • 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
    • B01F23/23341—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 with tubes surrounding the stirrer
    • 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
    • B01F23/2336—Mixing 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
    • B01F23/23362—Mixing 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 under the stirrer
    • 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
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms 
    • 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
    • B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
    • B01F27/1125—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades with vanes or blades extending parallel or oblique to the stirrer axis
    • 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
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/50—Movable or transportable mixing devices or plants
    • B01F33/503—Floating mixing devices

Definitions

  • the present invention relates to a method for feeding gas or gas mixture into liquid, in which method a preferably vertical tube is arranged in a liquid contained in a tank or equivalent space, and the liquid is made to flow through the tube from top to bottom by means of a liquid transport device placed in the pipe and provided with an impeller, and gas is conducted into the liquid after the impeller, when seen in the flowing direction.
  • the present invention also relates to an apparatus for feeding gas or gas mixture into liquid, the said apparatus comprising a tube which is installed preferably vertically in a liquid containing tank or equivalent, which tube is provided with a liquid inlet and a liquid outlet, and inside which tube there is arranged a liquid transport device provided with an impeller and a gas feeding device located in the tube below the impeller when seen in the flowing direction, through which gas feeding device gas is fed into the liquid flow, and which impeller makes the liquid and the liquid and gas mixture to flow through the tube downwards, i.e. from top to bottom.
  • gas or gas mixture is blown onto the bottom of a liquid containing tank, wherefrom it rises in bubbles directly and rapidly to the surface of the liquid and is thereafter discharged into the environment. In this case only a small portion of the gas is transferred into the liquid, wherefore it is necessary to blow gas into the liquid continuously and in large quantities. With this method, energy consumption tends to rise immoderately high while the gas transfer efficiency remains poor.
  • gas or gas mixture is blown onto the bottom of a liquid containing tank, and the gas bubbles rising from the bottom are mixed into the liquid by means of a rapidly rotating flat blade turbine agitator.
  • the Finnish Patent Publication No. 35233 introduces a method and apparatus for aerating liquid effluents in the process of biological treatment.
  • water is made to flow within the tank at one or several spots through a cylindrical tube from top to bottom, essentially in vertical direction, first to the vicinicty of the tank bottom and subsequently sideways.
  • Air is mixed into the water flowing downwards in the tube so that the water and the air mixed therein both flow downwards together.
  • the flowing of the water downwards in the tube and the mixing of the air therein are carried out by means of an impeller, pulsator or the like, and air is conducted through a tubular pipe either to above or below the impeller.
  • the above described method is more advantageous than other prior art methods. It is not necessary to press air, or any gas, against a high liquid pressure down to the tank bottom, which procedure requires a lot of energy, but the mixture of air, water or gas and liquid is pumped deeper down by aid of the impeller, so that the energy consumption remains relatively low.
  • the impeller, pulsator or the like also sets the surrounding water and/or air and water mixture in a turbulent motion while in operation.
  • the air bubbles contained in the water or fed therein after the impeller may, as being lighter than water, be separated towards the vicinity of the centre axis of the tube and even be combined into large bubbles. Irrespective of the manner in which air is fed in, a homogeneous distribution of air into the water flowing in the tube is prevented. As a result, the air transfer efficiency in the liquid decreases.
  • the said apparatus comprises an elongate chamber at the upper end of a tube, in which chamber there are arranged an impeller, a blade wheel or the like, air feeding means and baffle plates.
  • the tube is narrower than the chamber and extends in the flow direction downwards, towards the bottom of the chamber. Air is admitted into the liquid effluent within the chamber, where the impeller agitates the water and the air, and pushes the mixture downwards into the subsequent tube.
  • the impeller agitates the water and the air, and pushes the mixture downwards into the subsequent tube.
  • planar baffle plates which are positioned parallel to the longitudinal axis of the pipe. The purpose of the said baffle plates is to prevent the air and water mixture agitated by the impeller from assuming turbulent motion and to convert its motion so that it is directed axially downwards.
  • the object of the present invention is to realize an improved method and apparatus for feeding gas or gas mixture into liquid wherein the drawbacks of the above described methods and apparatuses are eliminated.
  • the turbulent motion created by the impeller can be effectively attenuated.
  • the kinetic energy bound in the turbulent motion of the liquid is converted into kinetic energy of the flow which is directed parallel to the tube axis.
  • the impeller is fitted inside the tube so that the rotating area of the impeller covers at least 80% of the cross-sectional area of the tube, and secondly, the baffles are fitted in the tube so that they extend, in the direction of the tube radius, over the whole rotating area of the impeller. If the first requirement is not fulfilled, liquid flows in the tube at an irregular velocity, and part of the large quantity of gas fed into the liquid may escape upwards through the annular aperture left between the tips of the impeller blades and the tube casing, which may critically disturb both the liquid transport and the feeding of gas into the liquid.
  • the guide baffles extend over the whole cross-sectional area of the tube, and their influence in the flowing liquid at each specific spot in the tube is equally strong. As the intake edges of the baffles extend near to the trailing edges of the impeller blades, the influence of the matching operation is most effective, and turbulent currents are not formed in the liquid.
  • the feeding of gas into the flow is carried out immediately after the liquid flow has been directed and the current flows mainly parallel to the tube.
  • the pontoons 11 are arranged to support the apparatus in a water tank.
  • the apparatus comprises the cylindrical tube 1, which is located advantageously vertically in the water tank.
  • the tube is provided with at least one water inlet 2 and at least one water outlet 3.
  • the tube 1 comprises the guide baffles 5 and the gas feeding device 6.
  • the guide baffles 5 are located radially and mainly parallel to the tube 1.
  • the discharge openings of the gas feeding device 6 are connected to the inside of the tube, at the earliest stage with respect to the flowing direction on such a horizontal plane in the tube where the liquid already flows mainly in the tube direction D-D.
  • the gas feeding device 6 is connected to the air blower 9.
  • the feeding device 6 can, however, also be connected to an oxygen container or other vessel or device transferring or producing oxygen.
  • the motor 8 On the raft 10, which floats in the water supported by the pontoons 11, there is installed the motor 8 and the air blower 9.
  • the motor 8 is connected to the fulcrum 42 of the impeller 4 by means of the axis 7.
  • the air blower 9 is connected by means of pipes 12 or hoses to the air feeding device 6 which is located in the tube 1.
  • the impeller 4 is provided with two or more blades 41, which are attached symmetrically around the fulcrum 42 of the impeller.
  • the measures of the impeller 4 are arranged in a generally known fashion so that the difference in pressure over the impeller, at each separate spot thereof is equally great during operation.
  • the impeller 4 is capable of pushing water in the tube 1 with equal power over the whole rotating area of the impeller.
  • the rotating area of the impeller is defined as the area of the circle drawn by the tips of the impeller blades 41 while in rotation, the distance of the said tips from the centre axis being r,.
  • the form of the blade 41 of the impeller 4 is such that the angle a between the tangent E of the trailing edge 41a of the blade ( Figure 2) and the rotating plane P-P of the impeller 41 changes as a function of the distance r ( Figure 1).
  • This is due to the fact that while the impeller is in rotation, the circumferential speed at separate points of the trailing edge 41a of the blade 41 at the distance r changes: near the tip of the blade 41 the circumferential speed is high and the trailing angle a of the blade is small, whereas near the fulcrum 42 of the impeller the circumferential speed is low and the trailing angle a is large.
  • the angle a of the trailing edge 41 a of the blade 41 determines the angle at which the water leaves the blade 41.
  • Figure 2 which illustrates the cross-section of the blade 41 and the baffle 5 for instance at the distance r from the impeller axis in Figure 1.
  • the impeller rotating direction is marked Pp and the direction of the impeller axis is marked P a , the latter being parallel to the axis D-D of the tube 1.
  • the circumferential speed vector of the impeller blade 41 is referred to as v P , and v, represents such a speed vector of the water which is parallel to the tube axis D-D and describes the direction and power of the water flow before the impeller when seen in the flowing direction C.
  • the vector v is divided into two components, i.e. v 1E parallel to the tangent E of the blade 41 and v 1p parallel to the circumferential speed vector vp of the impeller, and the circumferential speed vector v p of the impeller is taken into account
  • the resulting vector is V 2 which approximately represents the speed and direction of the water flow leaving the blade 41.
  • the angle of departure of the water flow, with respect to the rotating plane P-P is marked with ⁇ .
  • the impeller 4 and the baffles 5 are matched with each other so that the direction of the water flow leaving the blade 41 of the impeller 4, roughly parallel to the direction of the vector v 2 , is equal to the direction F of the tangent of the intake edge 51a of the baffle 5.
  • the baffles 5 are, at least at the end 51 which is first on the impeller side when seen in the tube direction D-D, members with an advantageously curved surface as is seen for example in Figure 2.
  • the tangent G of the trailing edge 52a of the baffle 5 is parallel to the tube axis D-D.
  • the baffles 5 can also be realized as members parallel to the axis D-D, i.e. to the tube 1. This embodiment is illustrated by dotted lines in Figure 2. In this case the first end 51' of the baffle 5 at the impeller side is straight and parallel to the other end 52. While employing a baffle of this type, the liquid flow leaving the impeller blade 41 hits the baffle at a certain angle 90°- ⁇ with respect to the axis D-D, the size of which angle 90°- ⁇ also depends on each separate point on the blade and the baffle, i.e. it is a function of the distance r. This results in turbulent flows, and the turbulence does not attenuate as easily as in the case of the curved baffle described above.
  • the impeller 4 is fitted within the tube 1 so that the ratio between the rotating area nr 2 of the impeller 4 and the cross-sectional area nR 2 of the tube, where R is the inner radius of the tube 1, is &0,8. This arrangement prevents back flows in the tube periphery and thus increases the efficiency.
  • baffles 5 fulfil their function as well as possible, their vertical width is roughly equal to the tube radius R. Moreover, the greatest distance h 1 between the impeller 4 and the baffles 5 in the tube direction should be shorter than the maximum height hp of the impeller ( Figure 1).
  • the gas feeding device 6 is formed of at least one member 61 with a blade-like profile. On the sides of this member, advantageously on its downwards curved parts and/or on its trailing edge, there are located discharge openings 62 at short intervals from each other.
  • the device 6 is connected to the air blower 9 or equivalent by means of the pipe 12 or the like.
  • At least one blade-like member 61 of the air feeding device 6 is placed at an interval from the baffles 5, when seen in the flow direction and advantageously so that the blade-like member 61 are located in between the imaginable continuations of the guide baffles 5 parallel to the tube axis, preferably in the middle of the said areas as is shown in Figure 4.
  • the blade-like members 61 also serve as members which stabilize the flow.
  • the distance h 2 of the blade-like members 61 of the air feeding device 6 from the baffles 5 in the direction D-D of the axis of the tube 1 is shorter than the length h s of the baffles 5 in the direction of the axis of the tube 1.
  • the blade-like members 61 can also be positioned between the baffles 5.
  • One viable solution is to leave out the blade-like members 61 and to feed the air into the water flow through the guide baffles 5.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)

Abstract

Dans le procédé ci-décrit, un tube vertical (1) est disposé dans un liquide contenu dans un réservoir, et on provoque l'écoulement du liquide à travers le tube de haut en bas à l'aide d'un dispositif de transport du liquide placé dans le tube et pourvu d'un rotor (4), et le gaz est conduit dans le liquide via un dispositif d'acheminement du gaz (6) placé en aval du rotor, vu dans le sens d'écoulement du liquide. La turbulence du liquide, provoquée parle rotor, est atténuée du fait que dans le tube, en aval et au voisinage du rotor, des déflecteurs (5) sont montés radialement et essentiellemnt parallèlement au tube. Le gaz est acheminé dans leliquide, le plus tôt possible, par rapport au sens d'écoulement du liquide, après atténuation de la turbulence et écoulement du liquide principalement dans le sens du tube. Le rotor (4) et les déflecteurs (5) sont appariés de sorte que le sens d'écoulement du liquide quittant la pale du rotor est approximativement parallèle à la tangente du bord d'admission du déflecteur.

Claims (11)

1. Procédé pour introduire un gaz ou un mélange de gaz dans un liquide, selon lequel on dispose un tube de préférence vertical dans un liquide contenu dans un réservoir au dans un espace équivalent et on amène le liquide à circuler dans le tube depuis la partie supérieure jusqu'à la partie inférieure au moyen d'un dispositif d'entraînement du liquide, qui est monté à l'intérieur du tube et comporte un rotor, et on introduit un gas dans le liquide en aval du rotor, lorsqu'on regarde dans la direction d'écoulement, et le déplacement turbulent du liquide, créé par le rotor, est atténué moyennant la mise en place de chicanes de guidage en aval du rotor à l'intérieur du tube, lesquelles chicanes sont disposées radialement en étant sensiblement parallèles au tube, caractérisé en ce que le tube possède une section transversale sensiblement constante, que les chicanes sont montées dans le tube de manière à s'étendre, dans la direction radiale du tube, sensiblement sur toute la zone de rotation du rotor et que leur bord supérieur est à proximité directe du rotor, et que la totalité du gaz est introduite dans le liquide au stade le plus précoce, en rapport avec la direction d'écoulement, une fois que le déplacement turbulent s'est atténué et que le liquide circule principalement dans la direction du tube.
2. Procédé selon la revendication 1 pour introduire un gaz ou un mélange de gas dans un liquide, caractérisé en ce que le rotor et les chicanes sont adaptés de telle sorte que la direction de l'écoulement d'eau quittant la pale du rotor est approximativement parallèle à la tangente du bord d'entrée de la chicane.
3. Procédé selon la revendication 1 ou 2, pour introduire un gaz ou un mélange de gas dans un liquide, caractérisé en ce que le rotor est disposé dans le tube de manière que la zone de rotation du rotor occupe au moins 80% de la surface en coupe transversale du tube.
4. Procédé selon la revendication 3, pour introduire un gaz ou un mélange de gas dans un liquide, caractérisé en ce qu'on introduit le gaz dans le liquide, dans la zone subsistant entre des chicanes ou leurs prolongements imaginables, et ce de telle sorte que l'écoulement de gaz est dirigé dans le liquide principalement dans la direction d'écoulement du liquide.
5. Procédé selon la revendication 3 pour introduire un gaz ou un mélange de gas dans un liquide, caractérisé en ce qu'on introduit le gaz dans le liquide au moyen des chicanes et ce de telle sorte que l'écoulement de gaz est dirigé dans le liquide principalement dans la direction d'écoulement du liquide.
6. Dispositif pour introduire un gaz ou un mélange de gaz dans un liquide, comprenant un tube (1) installé de préférence dans une position verticale dans un réservoir contenant le liquide ou dans un espace équivalent, et comportant une entrée (2) et une sortie (3) pour le liquide et à l'intérieur duquel se trouve intallé le dispositif d'entraînement du liquide comportant un rotor (4), en aval duquel est disposé, lorsqu'on regarde dans la direction d'écoulement, le dispositif (6) d'introduction du gaz, au moyen duquel un gaz est introduit dans l'écoulement de liquide, lequel rotor (4) est utilisé pour amener le liquide et le mélange du liquide et du gaz à circuler dans le tube de la partie supérieure à la partie inférieure, des chicanes (5), qui sont disposées radialement et principalement parallèlement au tube (1), étant situées entre le rotor (4) et le dispositif (6) d'introduction du gaz, caractérisé en ce que le tube possède une section transversale sensiblement constante, les chicanes (5) sont montées dans le tube (1) de manière à s'étendre dans la direction radiale du tube, sensiblement sur la totalité de la zone de rotation du rotor (4) et leur bord supérieur étant situé au voisinage immédiat du rotor (4), et que les ouvertures de refoulement dudit dispositif (6) d'introduction du gaz sont raccordées à l'intérieur du tube (1), au stade le plus précoce, en rapport avec la direction d'écoulement, dans le plan perpendiculaire à l'axe (D-D) du tube (1), dans lequel le liquide circule déjà essentiellement dans la direction (D-D) du tube (1), et qu'il est prévu des moyens (9, 12) pour réaliser l'introduction du gaz au moyen dudit dispositif (6) d'introduction du gaz.
7. Dispositif selon la revendication 6 servant à introduire un gaz ou un mélange de gaz dans un liquide, caractérisé en ce que les chicanes (5) sont recourbées au niveau de l'extrémité (51), qui est la première du côté du rotor, lorsqu'on regarde dans la direction du tube (1), et sont de préférence parallèles à l'axe (D-D) du tube (1) au niveau de l'autre extrémité (52) du côté de la sortie, et que la tangente (E) à la surface intérieure de l'aube, tracée de façon imaginaire en un point du bord arrière (41A) de chaque pale (41) du rotor (4) et déterminant la direction (V2) de l'écoulement d'eau quittant ledit point, et la tangente (F) tracée de façon imaginaire en chaque point respectif du bord d'entrée (51 a), situé du côté du rotor, de chaque aube (5) sont adaptées l'une à l'autre de manière que la direction (V2) de l'écoulement d'eau quittant la pale (41) du rotor est approximativement parallèle à la tangente (F) au bord d'entrée (51a) de la pale (5), lesdits deux points étant situés à une même distance (r) de l'axe (D-D) du tube dans le plan en coupe transversale de ce tube.
8. Dispositif selon la revendication 6 ou 7 pour introduire un gaz ou un mélange de gaz dans un liquide, caractérisé en ce que le rapport entre la surface en rotation (nr2) du rotor (4) et la surface en coupe transversale (nR2) du tube (1) est <0,8.
9. Dispositif selon la revendication 6, 7 ou 8 pour introduire un gaz ou une mélange de gaz dans un liquide, caractérisé en ce que la largeur des chicanes (5) dans le plan perpendiculaire à l'axe (D-D) du tube (1) est de préférence approximativement égale au rayon (R) du tube et que la distance maximale (h1) entre le rotor et les chicanes dans la direction du tube est inférieure à la hauteur maximale (hp) du rotor.
10. Dispositif selon la revendication 8 ou 9 pour introduire un gaz ou un mélange de gaz dans un liquide, caractérisé en ce que le dispositif (6) d'introduction du gaz comporte au moins un élément (61) possédant un profil en forme de pale, et que sur les côtés de cet élément de préférence sur les parties courbes descendantes et/ou sur le bord arrière, il est prévu des ouvertures de refoulement (62) situées à certains intervalles les unes des autres, et que ledit dispositif (6) d'introduction du gaz est raccordé à une soufflerie à gaz ou analogue au moyen d'une canalisation (12) ou d'un élément équivalent.
11. Dispositif selon la revendication 8, 9 ou 10 pour introduire un gaz ou un mélange de gaz dans un liquide, caractérisé en ce que la distance (h2) des éléments en forme de pales (61) du dispositif (6) d'introduction du gaz à partir des chicanes (5) dans la direction de l'axe (D-D) du tube (1) est inférieure à la longueur (hs) des chicanes (5) dans la direction du tube.
EP85904821A 1985-03-07 1985-09-30 Procede et appareil pour acheminer du gaz ou un melange de gaz dans un liquide Expired EP0252903B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85904821T ATE50925T1 (de) 1985-03-07 1985-09-30 Verfahren und vorrichtung zur zufuehrung eines gases oder einer gasmischung in eine fluessigkeit.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI850918 1985-03-07
FI850918A FI74628C (fi) 1985-03-07 1985-03-07 Foerfarande och anordning foer tillfoersel av gas eller gasblandning till vaetska.

Publications (2)

Publication Number Publication Date
EP0252903A1 EP0252903A1 (fr) 1988-01-20
EP0252903B1 true EP0252903B1 (fr) 1990-03-14

Family

ID=8520476

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85904821A Expired EP0252903B1 (fr) 1985-03-07 1985-09-30 Procede et appareil pour acheminer du gaz ou un melange de gaz dans un liquide

Country Status (7)

Country Link
EP (1) EP0252903B1 (fr)
CN (1) CN86101405A (fr)
AU (1) AU4956085A (fr)
DD (1) DD243434A5 (fr)
DE (1) DE3576464D1 (fr)
FI (1) FI74628C (fr)
WO (1) WO1986005123A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR9205151A (pt) * 1992-08-17 1994-03-01 Praxair Technology Inc Dissolucao aumentada de gas
DE102012100339A1 (de) * 2012-01-16 2013-07-18 Universität der Bundeswehr München Verfahren und Vorrichtung zur Stabilisierung eines Verdichterstroms
SE536982C2 (sv) * 2013-03-18 2014-11-25 Xylem Ip Man S R L Luftarsammansättning för spridning av en gas i en vätska
NO345652B1 (en) * 2020-04-30 2021-05-31 Nippon Gases Norge As A system and a method for supplying gas bubbles into a fluid

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE756252A (fr) * 1969-09-17 1971-03-01 Procedes Sem Procede et appareil pour realiser le melange entre une phase gazeuse etune phase liquide
US3643403A (en) * 1970-04-29 1972-02-22 Richard E Speece Downflow bubble contact aeration apparatus and method

Also Published As

Publication number Publication date
DE3576464D1 (de) 1990-04-19
AU4956085A (en) 1986-09-24
DD243434A5 (de) 1987-03-04
FI850918A0 (fi) 1985-03-07
FI74628C (fi) 1988-03-10
WO1986005123A1 (fr) 1986-09-12
EP0252903A1 (fr) 1988-01-20
FI74628B (fi) 1987-11-30
CN86101405A (zh) 1986-09-03
FI850918L (fi) 1986-09-08

Similar Documents

Publication Publication Date Title
EP0099078B1 (fr) Procédé et appareil de mélange d&#39;un gaz et d&#39;un liquide
EP1001840B1 (fr) Melangeur gaz-liquide a effet venturi
CA1124415A (fr) Appareil melangeur de fluides
EP0026493B1 (fr) Appareil pour la gazéification de liquides
US5451348A (en) Variable liquid level eductor/impeller gas-liquid mixing apparatus and process
US4844843A (en) Waste water aerator having rotating compression blades
US6158722A (en) Mixing system for introducing and dispersing gas into liquids
PL186826B1 (pl) Urządzenie do mieszania i napowietrzania cieczy oraz usuwania piany ze zbiornika do obróbki tej cieczy
AU2001279844A1 (en) Flotation mechanism and method for dispersing gas and controlling flow in a flotation cell
EP1309407A1 (fr) Mecanisme de flottation et procede permettant de disperser un gaz et d&#39;agir sur le debit dans une cellule de flottation
EP0058225B1 (fr) Réservoir sous pression pour aérer des eaux usées en les traitant par un procédé par boues activées
WO1997041952A1 (fr) Turbo-aerateur
EP0027912A1 (fr) Appareil pour mettre en contact un liquide avec un gaz
AU2009305321B2 (en) Mixer and method for mixing a gas and solution
FI87893C (fi) Saett att anrika malmsuspension med hjaelp av kraftig foerberedande blandning och samtidig flotation samt anordningar foer genomfoerande av detta
US20040245151A1 (en) Flotation mechanism and cell
WO1986005123A1 (fr) Procede et appareil pour acheminer du gaz ou un melange de gaz dans un liquide
EP0027911B1 (fr) Appareil pour mettre en contact un liquide avec un gaz
JP4987811B2 (ja) 曝気攪拌機
KR102382198B1 (ko) 수중 포기장치
EP0262717A2 (fr) Appareil pour mettre en contact un gaz avec un liquide, en particulier pour l&#39;aération d&#39;eau usée
JPH08173987A (ja) 高水深槽に適した曝気装置
JPH0314520B2 (fr)
JP3629979B2 (ja) 水中攪拌装置
SU1212541A1 (ru) Аппарат дл контакта газа и жидкости

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19871005

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT DE FR GB IT SE

17Q First examination report despatched

Effective date: 19880627

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE FR GB IT SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 19900314

Ref country code: AT

Effective date: 19900314

REF Corresponds to:

Ref document number: 50925

Country of ref document: AT

Date of ref document: 19900315

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3576464

Country of ref document: DE

Date of ref document: 19900419

ET Fr: translation filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19900723

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19900807

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19900918

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19901130

Year of fee payment: 6

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19910930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19911001

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19920529

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19920602

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 85904821.7

Effective date: 19920510