Vorrichtung zur Belüftung oder Begasung von Flüssigkeiten im Durchlauf

Vorrichtung zur Belüftung oder Begasung von Flüssigkeiten dadurch gekennzeichnet, dass In einen zylindrischen Behälter der oben geschlossen ist, ein Rührwerk eingebaut ist, mit einem die Welle umfassenden Rohr, das am oberen Ende mit dem Motorflansch verschraubt ist und seitlich eine Ansaugöffnung hat, die durch den Behälter nach außen geführt ist, sowie einen verschiebbaren Abschlussflansch am unteren Ende der Welle aufweist, der so justiert wird, dass zwischen dem dort aufgesetzten Mischflügel und dem Flansch ein Spalt entsteht, der dazu dient Wasser seitlich einzusaugen und es durch den Mischflügel mit durch Unterdruck der in dem die Welle umfassenden Rohr entsteht, eingesaugter Außenluft so zu vermischen, dass durch die Drehzahl des Mischflügels die Luft in feine Bläschen zerschlagen wird und durch den Mischflügel nach unten ausgeworfen am Behälterboden sich radial verteilt und mit der Zulaufströmung radial kreisend langsam in Richtung Wasseroberfläche steigt und dort in ein Ablaufrohr ...

SCHWIMMFAEHIGE RUEHRVORRICHTUNG

Flotation tank impeller

Improved method of and apparatus for bringing gas and liquid into intimate contact

... 819,785. Contacting gases with liquids. ENTREPRISE RENE ET JEAN MORITZ. Sept. 12, 1955 [Sept. 11, 1954; Aug. 30, 1955], No. 25979/55. Class 55 (2). A gas-liquid contact apparatus comprises a container d (Fig. 2) for liquid, a gas inlet tube g within which is mounted a device with blades a rotatable to circulate liquid in the container and devices j for heating or cooling the liquid as desired, the liquid being drawn downwardly through a tube f and urged outwardly together with the gas through baffles b carried by the blades a and stationary baffles c. In modifications the liquid circulated in the container may be drawn from near the base of the container or the tube f may extend above and below the rotating blades a. In a further modification (Fig. 8) the device rotated comprises a tube with nozzles u and u1 which eject the circulated liquid into members c2 and in which it mixes with gas entering by the inlet g.

APPARATUS FOR DISPERSING A GAS IN A LIQUID

... 1521785 Aerating liquids; froth flotation apparatus UNITED STATES FILTER CORP 5 May 1976 18377/76 Headings B1C and B2H Apparatus for dispersing a gas in a liquid comprises a vessel 12 in which is an impeller 46 rotated by a vertical shaft 34 and surmounted by a fixed inclined shroud 52 having radial vanes 54 on its upper surface, with apertures 56 between them located in the region of the highest pressure generated by the impeller. The impeller 46 may be detachable. Gas is supplied below the shroud by a valve 74 and a trunk 30, and emerges as bubbles through the apertures 56 in a substantially radially upward and outward direction. Stator vanes 63 below the shroud may support a diapt tube 60 in which is a propeller 58 preferably located one propeller diameter above the vessel bottom. The apparatus may be used for aerating sewage, removing oxygen by displacement by an inert gas, or (as shown) for froth flotation in which the liquid is supplied and removed through a submerged inlet and outlet ...

DEVICE FOR THE VENTILATION OF LIQUIDS ON WATER BASIS, IN PARTICULAR GUELLE OR CHANNEL OF WASTE WATER

EINRICHTUNG ZUR BEGASUNG VON FLUESSIGKEIT

ANLAGE ZUR AUFBEREITUNG VON IN EINEM LANG- GESTRECKTEN BEHAELTER-SYSTEM BEFINDLICHEN, VERUNREINIGTEN FLUESSIGKEITEN - INSBESONDERE VON WASSER

VERFAHREN UND VORRICHTUNG ZUM BELUFTEN VON GULLENGRUBEN UND GRABEN

DEVICE FOR THE VENTILATION OF LIQUIDS ON WATER BASIS, IN PARTICULAR LIQUID MANURE OR CHANNEL OF WASTE WATER

Rührwerk für Flüssigkeiten, insbesondere für Gülle

Es wird ein Rührwerk für Flüssigkeiten, insbesondere für Gülle, mit einem angetriebenen, leitringlosen Propeller (4) beschrieben, der wenigstens einen entlang einer Propellerwelle (2) wendeiförmig verlaufenden Propellerflügel (3) mit einer Saug- und einer Druckkante (5,11) aufweist. Um vorteilhafte Strömungsverhältnisse sicherzustellen, wird vorgeschlagen, dass die Saugkante (5) des Propellerflügels (3) zumindest angenähert entlang der Schnittlinie zwischen der Wendelfläche des Propellerflügels (3) und einer zur Propellerwelle (2) tangentialen Schnittfläche (6) verläuft und dann in eine Verbindungskante (7) übergeht, die im Wesentlichen der Schnittlinie der Wendelfläche mit einer zur Propellerwelle (2) parallelen, quer zur tangentialen Schnittfläche (6) ausgerichteten Fläche (8) folgt.

DEVICE FOR THE TREATMENT OF LIQUIDS

Method and apparatus for effecting gas-liquid contact

Wet process or ozonizing oxidation method

FLOATING-BAFFLE-MOUNTED DRAFT TUBE CIRCULATOR WITH VENTED GLAND SEAL

LIQUID AERATING APPARATUS

LIQUID AERATING APPARATUS Apparatus for aerating a pool of liquid has a hollow, rotatable drive shaft journaled for rotation about an axis and coupled at one end to a driving motor. A propeller is mounted at the other end of the drive shaft. The propeller has a plurality of hollow blades in communication with an internal aerating fluid passage in the drive shaft. A plurality of air inlets is provided in the drive shaft and at least one outlet port is provided in each blade at the zone of highest negative pressure resulting from rotation of the blade in the liquid. The drive shaft automatically is movable from a drydocked position in which the shaft is out of the liquid to an operating position in which the propeller blades are immersed in the liquid. A seal is provided between the propeller and the shaft journal to protect the latter against exposure to the liquid. The shaft is continuously pressurized between the journal and the seal to prevent liquid from passing through the seal should ...

Installation pour le traitement d'un liquide.

Ungekapseltes Motoraggregat für Flüssigkeitsrührer

Aggregat zur Herstellung von Gemischen, Lösungen, Emulsionen und Suspensionen

Verfahren und Einrichtung zur Begasung von Flüssigkeiten, insbesondere bei biologischen Prozessen

Procédé de traitement d'un liquide au moyen d'un fluide gazeux et installation pour la mise en oeuvre de ce procédé

Vorrichtung zum Vermischen von strömungsfähigen Medien

Verfahren und Vorrichtung zur biologischen Abwasserreinigung durch Sauerstoffeintrag mittels Luft

ROTATIONSSYMMETRISCHER MISCHER.

Device for admixing a liquid with gas.

Aeration of fermenting liquid fertilisers - using propeller with surrounding flow guide into which air is drawn

Aeration of liquids is achieved by motor driven propeller. This is surrounded by a concentric, circular flow guide into which an airline discharges. The other end of this air line may be open to atmosphere or connected to a blown air supply. The flow guide can be a ring shaped pipe or be a cylindrical sheath surrounding the propeller. The airline may be joined to the ring shaped pipe. The air line may be formed from the hollow shaft of the propeller. Also, it may form a concentric pipe around the shaft. Used in the treatment of liquid manures. The fertiliser value of these is improved if anaerobic digestion is replaced by aerobic. The device permit intense aeration even in the presence of other substances.

PLANT FOR THE PROCESSING OF POLLUTED LIQUIDS.

Method and device for purification of industrial waste water

DISPOSITIF PERMETTANT L'INCORPORATION D'ADJUVANTS LIQUIDES OU GAZEUX DANS UN MILIEU FLUIDE

... a. Dispositif permettant l'incorporation d'adjuvants liquides ou gazeux dans un milieu fluide. b. Il comprend un moteur 1 actionnant un arbre 2 à l'extrémité inférieure duquel se trouve une turbine. Celle-ci aspire en deux contre-courants l'adjuvant amené par le tube 3 et le milieu liquide qui se mélangent dans une zone de dépression interne de la turbine; lé mélange est homogénéisé par éjection vrillé dans le plan de rotation de la turbine. c. Les usages sont : la désodorisation et l'épuration par oxydation des lisiers d'animaux et des eaux résiduaires, l'incorporation d'adjuvants dans l'industrie chimique, la fabrication des colorants, des colles, des peintures et des aliments homogénéisés pour les hommes et les animaux.

TREATMENT OF A LIQUID BY MEANS OF A GASEOUS FLUID

DEVICE TO INTRODUCE A GAS INTO A LIQUID

MIXING DEVICE FOR INTRODUCING ADDITIVES INTO A LIQUID

Installation improved for the treatment of the liquids

Oxidation deodoriser for liquid manure and waste water - with gas-liquid mixing at bottom of tank

Mixing gas into a liquid - using rotating compound agitator with turbine and vaned sections

Impeller draft tube, shroud, impeller and aerator

A shroud for an impeller used for aeration of contaminated water, has a front portion for a propeller, behind it is a rear portion with separate apertures for water and air, the air aperture accommodates the propeller shaft. A draft tube connected to the shroud has a stub tube at the rear end for air ingress. The propeller shaft passes through the draft tube, and a bearing box to a motor. The draft tube has a rear attachment plate to which the bearing box is attached. The bearing box has a bearing for the shaft held in place by a retainer, it also is attached at its rear to a motor mounting plate, on which the motor is mounted. The impeller is mounted on a swivel arm mounted pivotally on a frame, typically on a raft. The swivel arm allows the impeller to be positioned angularly and lockably in a plurality of angular positions from horizontal to vertical.

Устройство для аэрации воды

Improvements in and relating to devices for generating foam

... 466,143. Making foam. HAYCOCK, G. W. Nov. 27, 1935, No. 32852. [Class 47 (ii)] A device for generating foam comprises a rotary impeller 1 at the lower end of a hollow shaft 4 which, at its upper end, is connected to an electric motor-5 5 or other prime mover. The impeller has blades 2, Fig. 2, with an advanced discharge angle, and rotates within a casing 8, 9 which is secured to the lower end of a tubular casing 12 and is formed with suction openings 10 and with fixed blades 7 defining discharge openings. When the impeller is rotated, foaming liquid is drawn in by the openings 10, and mixes with air induced through a control valve 16, ports 17 in the shaft 4, and port 3 at the centre of rotation of the impeller. The casing 8, 9 may be fitted with a cowl 22 for directing the foam discharged by the impeller. Compressed air or other gas may be supplied to the port 3. The device shown is a portable unit adapted to stand, on a pad 21, in foaming liquid in a bath or other vessel in which a foam ...

Motoraggregat as drive of in liquids rotating and degassing agitators

METHOD AND DEVICE FOR THE EXECUTION OF A GAS LIQUID CONTACT.

DEVICE FOR THE WET DESULPHURISING OF EXHAUST GASES.

PROCEDURE AND DEVICE FOR THE BELUFTEN BY GULLENGRUBEN AND DIGGING

FLOATING MIXER

APPARATUS FOR THE TREATMENT OF IMPURE LIQUIDS

DIP AERATOR

A dip aerator for sewage treatment plants comprising: a pump having a downwardly directed pump outlet and a pump inlet, the pump inlet being positioned below a water level in a sewage treatment basin of a sewage treatment plant; and an air hose, connected with the pump inlet and extending with a specified volume below the water level such that water fills the air hose when the pump is off in a manner such that water is delivered initially out of the pump outlet when the pump is activated.

METHOD AND APPARATUS FOR FEEDING AIR INTO A FLOTATION CELL

The invention relates to a method and apparatus for feeding air into a flotation cell provided with a rotor and a stator. According to the method and apparatus of the present invention, air is fed into the intermediate space formed in between the rotor and stator covers, to above the rotor, wherefrom the air is distributed symmetrically.

DISPOSITIF POUR INTRODUIRE UN GAZ DANS UN LIQUIDE

DISPOSITIF POUR INTRODUIRE UN GAZ DANS UN LIQUIDE SELON LE BREVET PRINCIPAL, ET NOTAMMENT SELON SA REVENDICATION 1, APPLIQUE A LA PREVENTION DE LA DECANTATION DES BOUES DANS LE FOND DES DEGRAISSEURS AERES ET DU DEPART AVEC L'EFFLUENT EPURE DES FLOTTANTS, AINSI QU'A LA RECIRCULATION DES BOUES ACTIVEES DU BASSIN DE DECANTATION AU BASSIN D'AERATION, EN PERMETTANT UNE REPRISE EN CONTINU, DURANT TOUT LE TEMPS OU FONCTIONNE LE DISPOSITIF, DES BOUES DECANTEES ET DES FLOTTANTS, CE DISPOSITIF ETANT CARACTERISE EN CE QU'IL COMPREND: UNE CUVETTE 24 DE FORME TRONCONIQUE DONT LA GRANDE BASE, TOURNEE VERS LE HAUT, EST PLACEE SOUS LA TURBINE DE BRASSAGE 22 ET DANS L'AXE DE CETTE DERNIERE, ET UNE CONDUITE 26 DEBOUCHANT DANS LADITE CUVETTE A SA PARTIE INFERIEURE, IMMEDIATEMENT AU-DESSUS DE SA PETITE BASE, ET AMENANT LES BOUES A RECIRCULER AFIN D'ALIMENTER LADITE CUVETTE TANGENTIELLEMENT, DANS LE SENS DE ROTATION DE LA TURBINE.

Sophisticated process and equipment for the setting in contact intimate gases and liquids in particular in the manufacture of the sulphuric acid

Aerator esp. for waste water purification - inducing centrifugal flow of gas and liquid at surface

Oxidation deodoriser for liquid manure and waste water - with gas-liquid mixing at bottom of tank

Appts. for incorporating liq. or gaseous additives in fluid media - comprises turbine or centrifugal mixer, used for prodn. of dyes, paints, foodstuffs etc.

SYSTEM OF AGITATION FOR SEPARATION OF MATERIALS BY MEANS OF FLOTAÇÃO

MIXING SYSTEM FOR SEPARATION OF MATERIALS BY FLOTATION

L'invention concerne un système de mélange destiné à un réservoir de flottation (10). Ce système comprend une turbine à flux radial (24) et une turbine à flux axial (26) qui sont montées rotatives sur un arbre commun (32), la turbine de flux axial (26) étant située au-dessous de la turbine de flux radial (24).

Flotation machines and components thereof

Froth flotation apparatus with mechanical agitation and aeration. Impeliers and diffusers therefor which are more durable and less expensive than the state-of-the-art components.

Aeration and mixing apparatus

An aeration and mixing apparatus for use in a wastewater treatment facility is mounted on a float and includes an axial-flow mixer having a stem that extends through a flow channel in the float, a diffuser cone slidingly mounted on the mixer stem and a diffuser hood fixedly attached to the diffuser cone and located below the float. A diffuser-drive mechanism mounted on the float transfers the diffuser cone and attached diffuser hood between a first, aeration position and a second, anoxic-mixing position. In the first position, the cone is spaced above the channel of the float and the diffuser hood abuts a bottom surface of the float with wastewater being propelled by the mixer upwardly through the hood and flow channel onto the diffuser cone where it is dispersed outwardly in the air above the float. In the second position, the cone is seated on the float in the channel, blocking flow of fluid through the flow channel, and the diffuser hood is spaced from the bottom of the float with the ...

Device for introducing a gas into a liquid

... 1. A device for introducing a gas into a liquid containing decanted sludges which are to be recirculated, of the type comprising a driving-motor (10), a wind-box (16), a gas intake pipe (18) and a radial diffusion turbine (20) coupled with a stirring turbine (22), both turbines being immersed in the liquid mass, characterized in that it comprises a vat (24) in the form of a frustum of cone the longer and simultaneously upper base of which is located under the stirring turbine (22), coaxially to the latter, and a pipe (26) opening in said lower part of the vat closely above the shorter base of said vat and conveying the sludges which are to be re-circulated, for tangentially feeding said vat in the direction of rotation of the turbine.

Реактор для окисления остатков нефтепродуктов

Использование: в области окисления остатков нефтепереработки воздухом в нефтеперерабатывающей промышленности, а также в других отраслях для выпуска малотоннажных сортов битума. Сущность изобретения: в реакторе, содержащем цилиндрический корпус с патрубками для загрузки сырья, выгрузки готового продукта, отвода отходящих газов и рабочее колесо с полым валом, связанным с атмосферой и всасывающим патрубком, расположенным в нижней части реактора, коакси- ально валу размещены цилиндрические перегородки с днищами, рабочее колесо расположено в верхней части реактора, днище внешней перегородки установлено выше всасывающего патрубка рабочего колеса, а днище внутренней перегородки установлено выше рабочего колеса. 1 ид ...

NASSOXYDATIONS- ODER OZONIERUNGSVERFAHREN

Drive motor assembly for gas impeller or - expeller rotating in fluid media

The gas-impeller or expeller's motor is mounted in a double-wall housing rising up above the level of the liquid surface and open at the top. The height of the housing conforms to the required immersion depth for the impeller or expeller stirrer. The shaft outlet from the housing is sealed by elements opposite the fluid.

Device for the introduction of gaseous, liquid or solid treatment agents for the improvement of polluted water

It is known to introduce atmospheric oxygen and other treatment agents into oxygen-poor water/waste water by means of a driven water propeller, which breaks up air fed to it into bubbles and which ejects these treatment agents (which may be solid or liquid according to choice) with the propeller stream (DE P 2724533). According to the invention, it is proposed to design the drive shaft with two shaft ends, a front and a rear shaft end. A co-rotating air feeder, mounted on the front shaft end, having slits, holes or the like can give off air fed from a compressor as air bubbles, which, on passing by the housing, are sucked in by a propeller mounted on the rear shaft end and are ejected with the water stream. Combinations of feeders, turbulence inducers and propellers can also be mounted on the two shaft ends and by means of these one treatment agent can be introduced several times, or more than one, for example gaseous, liquid or solid, treatment agent can be introduced into the water. According ...

METHODE UND VORRICHTUNG ZUR DURCHFÜHRUNG EINES GAS-FLÜSSIGKEIT-KONTAKTES.

METHOD AND APPARATUS FOR FEEDING AIR INTO A FLOTATION CELL

MECHANISM FOR THE AERATION OF LIQUID

Device for the treatment of a liquid

DEVICE FOR THE BEGASEN OF A LIQUID AND USE OF THIS DEVICE.

WET OXIDATION OR OZONIERUNGSVERFAHREN

Mixing unit for bringing in arbitrary additives as secondary components in liquids and/or stationary waters, in particular for the biological cleaning of water

PLANT FOR THE PROCESSING LIQUIDS - IN PARTICULAR OF WATER, POLLUTED BY IN A LONG STRETCHING CONTAINER SYSTEM PRESENT ONE,

MECHANISM FOR THE AERATION OF LIQUID

METHOD AND APPARATUS FOR EFFECTING GAS-LIQUID CONTACT

METHOD AND APPARATUS FOR EFFECTING GAS-LIQUID CONTACT

... 2133454 9319836 PCTABS00027 Components, usually but not exclusively gaseous components, are removed in a liquid medium from gas streams and chemically converted into an insoluble phase or physically removed. Specifically, hydrogen sulfide may be removed from gas streams by oxidation in aqueous chelated transition metal solution in a modified agitated flotation cell. The same principle may be employed with other procedures in which a gaseous phase is dispersed in a liquid phase to effect an interaction between components present in such phases, for example, to treat or strip or react a component of the liquid phase. A gas-liquid contact apparatus, which may be a combined chemical reactor and solid product separation device, also is described. In order to effect efficient mass transfer and rapid reaction, gas bubbles containing hydrogen sulfide and oxygen are formed by rotating an impeller at a blade tip velocity of at least about 350 in/sec. to achieve the required shear. To assist in the ...

METHOD AND APPARATUS FOR EFFECTING GAS-LIQUID CONTACT

Mixing system for separation of materials by flotation

Mixing gas into a liquid - using rotating compound agitator with turbine and vaned sections

four-function mixer - interchanged by axial displacement of turbine. i.e. for suctioning fluid at desired depth, grinding particles, homogenising and pumping

Improvements with the devices of ventilation of the liquids or vapor or gas dispersion in liquids

Gas-liq contactor esp. for crystalline suspensions - with gas flow through annular gap between rotor and stator atomised by rotor blades

Aerator esp. for waste water purification - inducing centrifugal flow of gas and liquid at surface

DISPOSITIF D'INTRODUCTION DE GAZ DANS DES LIQUIDES

FLOTATION CELL VORTEX STABILIZER

A froth flotation cell includes a tank, a drive shaft rotatably disposed in the tank, a rotor connected to the drive shaft for imparting rotational energy to a fluidic/slurry material disposed in the tank, a standpipe mounted at least partially inside the tank proximate an upper end of the rotor, and at least one vortex stabilization structure connected to the standpipe and extending inwardly from an inner surface of said standpipe. The vortex stabilization structure may take the form of a helical vane or web extending circumferentially at an acute angle relative to a transverse plane oriented perpendicular to the axis of the standpipe.

Liquid aerating apparatus

Apparatus for aerating a pool of liquid has a hollow, rotatable drive shaft journaled for rotation about an axis and coupled at one end to a driving motor. A propeller is mounted at the other end of the drive shaft. The propeller has a plurality of hollow blades in communication with an internal aerating fluid passage in the drive shaft. A plurality of air inlets is provided in the drive shaft and at least one outlet port is provided in each blade at the zone of highest negative pressure resulting from rotation of the blade in the liquid. The drive shaft automatically is movable from a dry-docked position in which the shaft is out of the liquid to an operating position in which the propeller blades are immersed in the liquid. A seal is provided between the propeller and the shaft journal to protect the latter against exposure to the liquid. The shaft is continuously pressurized between the journal and the seal to prevent liquid from passing through the seal should the seal become worn.

Устройство для аэрации воды

A rotary vaned impeller for aerating a liquid having a barrier directing gas outwardly

The impeller for mixing gas and liquid in froth flotation apparatus, has an upright gas supply tube 11 with vanes 12 extending outwardly therefrom, the vanes 12 having an upper part 19 inducing liquid flow downwardly towards the impeller and a lower part 20 inducing liquid flow upwardly towards the impeller. A barrier 14, in the form of an annular flange, divides the upper and lower parts 19,20, and gas is discharged from the lower end of tube 11 below the barrier. The barrier 14 directs gas radially-outwardly to a position (43, Fig 3) where gas/liquid mixing occurs.

RÜHRWERK ZUM EINTRAGEN VON LUFT IN FLÜSSIGKEITEN, INSBESONDERE IN GÜLLE

RÜHRWERK ZUM EINTRAGEN VON LUFT IN FLÜSSIGKEITEN, INSBESONDERE IN GÜLLE

VORRICHTUNG ZUR BELUEFTUNG VON FLUESSIGKEITEN AUF WASSERBASIS, INSBESONDERE GUELLE ODER KANAL- ABWAESSER

PROCEDURE AND DEVICE FOR THE BELUFTEN BY GULLENGRUBEN AND DIGGING

AGITATOR FOR REGISTERING AIR IN LIQUIDS, IN PARTICULAR IN LIQUID MANURE

PLANT FOR THE PROCESSING LIQUIDS - IN PARTICULAR OF WATER, POLLUTED BY IN A LONG STRETCHING CONTAINER SYSTEM PRESENT ONE,

Rührwerk für Flüssigkeiten, insbesondere für Gülle

Es wird ein Rührwerk für Flüssigkeiten, insbesondere für Gülle, mit einem angetriebenen, leitringlosen Propeller (4) beschrieben, der wenigstens einen entlang einer Propellerwelle (2) wendelförmig verlaufenden Propellerflügel (3) mit einer Saug- und einer Druckkante (5,11) aufweist. Um vorteilhafte Strömungsverhältnisse sicherzustellen, wird vorgeschlagen, dass die Saugkante (5) des Propellerflügels (3) zumindest angenähert entlang der Schnittlinie zwischen der Wendelfläche des Propellerflügels (3) und einer zur Propellerwelle (2) tangentialen Schnittfläche (6) verläuft und dann in eine Verbindungskante (7) übergeht, die im Wesentlichen der Schnittlinie der Wendelfläche mit einer zur Propellerwelle (2) parallelen, quer zur tangentialen Schnittfläche (6) ausgerichteten Fläche (8) folgt.

Flotation tank impeller

GAS INJECTION METHOD AND APPARATUS

A method and apparatus for injecting a gas into a liquid in which a rotating helical impeller (30) within a draft tube (20) submerged in the liquid creates a liquid flow within the draft tube. Gas bubbles are injected into the draft tube either above or below or alongside the helical impeller or in all three locations. The liquid is drawn into the draft tube with a superficial velocity greater than a substantially uniform terminal ascent velocity of the gas bubbles to allow entrainment ofundissolved gas bubbles in the bulk liquid into the liquid being drawn into the draft tube. The gas bubbles are injected with a uniform diameter of between about 10.0 microns and about 1.0 millimeters. The small bubble size enhances the dissolution of the gas into the liquid and also allow the entrainment of the gas into the liquid being drawn into the draft tube. The gas can be oxygen, ozone or carbon dioxide.

METHOD AND APPARATUS FOR FEEDING AIR INTO A FLOTATION CELL

FLOTATION TANK IMPELLER

An impeller for use with apparatus to enhance mixing of a gas and a liquid, as used for example in froth flotation apparatus, having a substantially upright portion (11) substantially parallel to the axis of rotation (17), and a plurality of vanes (12) extending outwardly therefrom, at least some of the vanes (12) having an upper part (19) adapted to induce liquid flow generally downwardly towards the impeller and a lower part (20) adapted to induce liquid flow generally upwardly towards the impeller, wherein the impeller further comprises barrier means (14) at least partially dividing the upper and lower parts, and a gas input situated on the same side of the barrier means (14) as the lower part (20). The barrier means (14) may comprise a flange like member in a plane generally perpendicular to the axis of rotation (17) and may intersect, or be integral with at least part of the vanes.

Apparatus of ventilation for tank of mixing

GAS INJECTION METHOD AND APPARATUS

A method and apparatus for injecting a gas into a liquid in which a rotating helical impeller within a draft tube submerged in the liquid creates a liquid flow within the draft tube. Gas bubbles are injected into the draft tube either above or below or alongside the helical impeller or in all three locations. The liquid is drawn into the draft tube with a superficial velocity greater than a substantially uniform terminal ascent velocity of the gas bubbles to allow entrainment of undissolved gas bubbles in the bulk liquid into the liquid being drawn into the draft tube. The gas bubbles are injected with a uniform diameter of between about 10.0 microns and about 1.0 millimeters. The small bubble size enhances the dissolution of the gas into the liquid and also allow the entrainment of the gas into the liquid being drawn into the draft tube. 1. An apparatus for injecting a gas into a liquid comprising:a draft tube adapted to be submerged in a liquid and having at least one inlet opening situated at one end of the draft tube and a discharge opening located at the other end thereof;a helical impeller located within the draft tube;a motor connected to the draft tube and a shaft projecting into the draft tube from the one end of the draft tube and connected to the helical impeller to rotate the helical impeller and thereby to create a liquid flow by drawing the liquid into the draft tube from the at least one inlet opening and discharging the liquid flow from a discharge opening; 'the gas bubble injector means configured to inject the gas bubbles with at least a substantially uniform diameter of between about 10.0 microns and about 1.0 millimeter to enhance the surface area of the gas bubbles and therefore, a dissolution rate of the gas within the liquid and to impart a buoyancy to the further part of the remaining portion of the gas bubbles that will result in at least a substantially uniform terminal ascent velocity thereof; and', 'means for injecting gas bubbles of the ...

Flotation Machine Rotor

A rotor for flotation machines or flotation cells of flotation machines includes blades that are configured to provide improved bubble flow and bubble generation performance while also reducing the power requirements for rotating the rotor to generate bubble flow within a tank of a flotation cell used to generate froth. Embodiments of the rotor may also be configured to be smaller than conventional rotor designs, which may help reduce the costs of manufacturing the rotor or flotation machines using such embodiments of the rotor. 114-. (canceled)15. A flotation machine comprising: a tank that is sized to retain a slurry comprised of a liquid mixed with at least one solid material;', 'a plurality of outer blades that extend outwardly from the body, each of the outer blades having an outer edge, the outer edge extending outwardly from an upper portion of the rotor to an outermost position located below the upper portion of the rotor, the outer edge extending inwardly from the outermost position to which the outer edge extends to a lower portion of the rotor, the lower portion of the rotor located below the outermost position to which the outer edge extends and is positioned inward relative to the outermost position of the outer edge.', 'a body having, 'a rotor positioned in the tank, the rotor rotated to agitate the slurry to facilitate formation of a bubbly flow used to generate a froth, the rotor attached to a column, the rotor comprising], 'at least one flotation cell, each of the at least one flotation cell comprising16. The flotation machine of wherein each outer edge defines a smooth outer surface of the blade and at least partially defines a shape of the outer blade such that the outer blade is generally half-heart shaped.17. The flotation machine of wherein the outer edge extends along a curved path defined by the formulas:{'sup': 6', '5', '4', '3', '2, 'y=10.974*x+10.512*x−43.377*x+28.863*x−4.6993*x+0.3068*x+0.5459 when x is valued from 0 to 0.7;'}y=1 when x ...

Shaft-Mounted Fluid Transfer Assembly for a Disosable Bioreactor

A fluid transfer assembly for single use bioreactors includes a fluid transfer housing that can be mounted to the impeller shaft using a bearing that places the fluid transfer assembly directly below the lowest impeller but allows the impeller shaft to spin inside independently of the fluid transfer assembly. A fluid conduit connects the fluid transfer housing to a port in the single use bag wall which allows fluids to be introduced into the sparger and which also helps prevent the fluid transfer assembly from rotating with the impeller shaft. 1. A fluid transfer assembly for a disposable bioreactor comprising:a fluid transfer housing having a housing body defining an input port, at least one outlet port and an elongate housing passageway extending in fluid communication therebetween;said housing body further defining an open shaft passageway extending therethrough; anda rolling element bearing, such as a roller bearing or a ball bearing, affixed within said shaft passageway, said rolling element bearing comprising concentric inner and outer bearing races and a plurality of rolling elements, such as rollers or balls, positioned between the inner and outer bearing races, the outer bearing race being affixed to the housing body and the inner bearing race including an inner surface defining a shaft aperture such that the inner race is affixable to an impeller shaft so that the shaft may rotate independently of said housing body.2. The fluid transfer assembly of claim 1 , further comprising a plurality of outlet ports in fluid communication with said housing passageway.3. The fluid transfer assembly of claim 1 , wherein said housing body includes opposed first and second planar major surfaces and a perimetrical side wall extending between said first and second major surfaces.4. The fluid transfer assembly of claim 3 , wherein said input port is defined by said perimetrical side wall of said housing.5. The fluid transfer assembly of claim 3 , wherein said first major ...

Flotation machine rotor

A rotor for flotation machines or flotation cells of flotation machines includes blades that are configured to provide improved bubble flow and bubble generation performance while also reducing the power requirements for rotating the rotor to generate bubble flow within a tank of a flotation cell used to generate froth. Embodiments of the rotor may also be configured to be smaller than conventional rotor designs, which may help reduce the costs of manufacturing the rotor or flotation machines using such embodiments of the rotor.

Gas injection method and apparatus

A method and apparatus for injecting a gas into a liquid in which a rotating helical impeller within a draft tube submerged in the liquid creates a liquid flow within the draft tube. Gas bubbles are injected into the draft tube either above or below or alongside the helical impeller or in all three locations. The liquid is drawn into the draft tube with a superficial velocity greater than a substantially uniform terminal ascent velocity of the gas bubbles to allow entrainment of undissolved gas bubbles in the bulk liquid into the liquid being drawn into the draft tube. The gas bubbles are injected with a uniform diameter of between about 10.0 microns and about 1.0 millimeters. The small bubble size enhances the dissolution of the gas into the liquid and also allow the entrainment of the gas into the liquid being drawn into the draft tube.

Gas injection method and apparatus

A method and apparatus for injecting a gas into a liquid in which a rotating helical impeller within a draft tube submerged in the liquid creates a liquid flow within the draft tube. Gas bubbles are injected into the draft tube either above or below or alongside the helical impeller or in all three locations. The liquid is drawn into the draft tube with a superficial velocity greater than a substantially uniform terminal ascent velocity of the gas bubbles to allow entrainment of undissolved gas bubbles in the bulk liquid into the liquid being drawn into the draft tube. The gas bubbles are injected with a uniform diameter of between about 10.0 microns and about 1.0 millimeters. The small bubble size enhances the dissolution of the gas into the liquid and also allow the entrainment of the gas into the liquid being drawn into the draft tube.