IL28602A - Device for the circulation and aeration of fluids - Google Patents

Device for the circulation and aeration of fluids

Info

Publication number
IL28602A
IL28602A IL28602A IL2860267A IL28602A IL 28602 A IL28602 A IL 28602A IL 28602 A IL28602 A IL 28602A IL 2860267 A IL2860267 A IL 2860267A IL 28602 A IL28602 A IL 28602A
Authority
IL
Israel
Prior art keywords
vanes
fluid
rotor
shaft
discs
Prior art date
Application number
IL28602A
Original Assignee
Venot Pic Sa
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 Venot Pic Sa filed Critical Venot Pic Sa
Publication of IL28602A publication Critical patent/IL28602A/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/14—Flotation machines
    • B03D1/16—Flotation machines with impellers; Subaeration machines
    • 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
    • B01F23/2331—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 introduction of the gas along the axis of the stirrer or along the stirrer elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2331—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 introduction of the gas along the axis of the stirrer or along the stirrer elements
    • B01F23/23311—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 introduction of the gas along the axis of the stirrer or along the stirrer elements through a hollow stirrer axis
    • 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
    • B01F23/2331—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 introduction of the gas along the axis of the stirrer or along the stirrer elements
    • B01F23/23314—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 introduction of the gas along the axis of the stirrer or along the stirrer elements through a hollow stirrer element
    • 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
    • B01F23/23352—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 moving perpendicular to the axis of rotation
    • 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
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/14—Flotation machines
    • B03D1/1418—Flotation machines using centrifugal forces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/14—Flotation machines
    • B03D1/1493—Flotation machines with means for establishing a specified flow pattern
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/20—Activated sludge processes using diffusers
    • C02F3/205—Moving, e.g. rotary, diffusers; Stationary diffusers with moving, e.g. rotary, distributors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/52—Mechanical actuating means with crank, eccentric, or cam
    • F16K31/524—Mechanical actuating means with crank, eccentric, or cam with a cam
    • 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
    • B01F27/115—Stirrers characterised by the configuration of the stirrers comprising discs or disc-like elements essentially perpendicular to the stirrer shaft axis
    • B01F27/1155—Stirrers characterised by the configuration of the stirrers comprising discs or disc-like elements essentially perpendicular to the stirrer shaft axis with interconnected discs, forming open frameworks or cages
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Biotechnology (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • Microbiology (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)

Abstract

1,192,796. Agitating and aerating liquids. VENOT-PIC S.A. 12 Sept., 1967 [20 Oct., 1966], No. 41642/67. Heading B1C. A rotor for aerating and circulating liquids especially in froth flotation comprises a plurality of generally radial hollow vanes 6 shrouded by discs 7, 8, and externally shaped to provide non-turbulent flow through the rotor. Pulp is circulated as at 10 through the annular aperture 9, and air is sucked or forced down the bore 2 of the shaft 1 and expelled from orifices 11 at the ends of the vanes, which may terminate radially as shown, or at an angle to the radius, and need not extend to the periphery of the discs (see Figs. 4-7, not shown). The ducts 5 in the vanes may increase in crosssection in the direction of air-flow, see Fig. 3 (not shown).

Description

Device for the circulation and aeration of fluids VMOT-PIC S.A.
C: -27155 This invention relates to a device of new design and simplified construction for the circulation and aeration of fluids:.
Devices for the circulation and the aeration of fluids which comprise a rotor submerged in the fluid are known..
Such devices are used, in particular in flotation processes, for circulating the pulp and introducing the air into it.
In certain known devices, the rotor is a disc provided with ribs or a hub provided with blades. The air required is introduced by cavitation created by the high-speed rotation of the rotor, at the cost of considerable consumption of energy for a given result without the proportion of the volume of air to the volume of pulp being necessarily appropriate to the needs of the flotation.
Devices have thus been developed in which the rotor, attached to a hollow shaft leading to the open air, has ducts open at one end in the shaft and at the other end on the periphery of the rotor. The rotor, whose general shape is that of a circular disc in a plane perpendicular to the shaft, either has ribs at its surface or, at its periphery, a surface generally parallel to the axis of rotation comprising elements which are inclined in relation to a direction tangential to the movement of the rotor* The ribs and, if necessary, the shape of the peripheric surface of the rotor, create a depression around this moving body which sucks in the air necessary for the flotation. The mechanical yield of this device,- though better than that of the preceding only for making the pulp circulate, but for creating a considerable agitation of the pulp. Once again there is no exact proportional relationship between the volume of air drawn in and the volume of pulp put into circulation.
The present invention relates to a rotor for flotation machines designed to remedy the above-mentioned disadvantages: this rotor is provided with vanes, disposed between two circular discs whose rational shape enables a large volume of pulp to be circulated for a low consumption of energy, The vanes of this rotor are provided with ducts opening out at one end into the hollow shaft leading to the open air and at the other end to the periphery of the rotor.
The depression around the rotor is created by the speed of ejection of the pulp; the air is thus drawn in in large quantities and, proportionally to the rate of input of the pulp. This arrangement ensures excellent flotation.
The energ consumption is low, for the pulp circulates within the rotor without turbulence* The accompanying figures provide a purely indicative example of the embodiment of the present invention.
Pig* 1 is a vertical section through one embodiment B-B-B of the invention taken along line of Pig. 2; Fig. 2 is a top plan view of the embodiment of A-A Pig. 1 partially broke away along line t-t of Pig. 1} Fig. 3 is a vertical section through an alternate embodiment of a vane of the present invention; Pigs. 4 and 5 are top plan views of further alternate embodiments of the invention, partially broken away; . 4 - j§ <· Pig. 7 is a top plan view of the embodiment of B-B' Fig. 6 broken away along line -J'l of Fig. 6.
The device according to Pigs. 1 and 2 comprises a hollow drive shaft 1 (only lower part shown) integrally attached to a rotor, and whose central bore 2 communicates by way of the cavity 3 and the holes 4 with the ducts 5 formed by the walls of the vanes 6 connecting the discs 7 and 8. The upper disc has a central hole 9 which allows the pulp to circulate as shown by the arrow 10.
When the rotor rotates, the pulp subjected to the centrifugal action of the vanes 6 is drawn in following the arrow 10 and ejected at high speed, thus producing a depression around the rotor which acting on the orifices 11 of the ducts 5 causes the air to be drawn in following the arrow 12.
It is quite evident that the above arrangements enable the rate of flow of the pulp to be obtained with a low energy consumption, and that it is determined by the shape adopted for the vanes and the speed of rotation of the rotor, that the depression created is in direct relation ship to the flow rate and that, in consequence, the rate of flow of the air is in direct relationship to the pulp flow rate, which creates the best conditions for a satisfactory flotation process.
The shape of the vanes and of the ducts must be designed for each particular case of flotation, depending on the characteristics of the pulp to be treated and the proportion of air desired. As a result, the vanes and the ducts may be of shapes other than those represented in Pigs.
For examplef as shown In Fig. 3» the gas duets can have a diverging part 13 which improves the suction.
Whilst their average line, as shown in Fig; 2, finishes perpendicularly to the trajectory of the outlet orifice, it can, as shown in Fig. 4» make an angle other than 90°· The vanes may also stop short of the periphery of the discs 7 and 8, as shown On Fig. 5.
Figs. 6 and 7 give a diagrammatic representation of an embodiment which conforms to the invention, even though the layout of the ducts is different.
Fig. 6 is a section along the line A-A-A and Fig. 7 a plan view with a partial cutaway section along the line B-B? The arrow 14 shows the path followed by the pulp and the arrow 15 that of the air.
The ducts which are shown horizontal may be inclined and the hollow shaft may be replaced by a solid shaft in the center of a tube, creating an annular air feed space.
The device can be applied to the introduction ©f diverse gases into diverse fluids. In addition, the suction created by the rotor according to the invention may be effected not only from the outside air but also from piping under pressure. 28602/2

Claims (2)

1. A device for circulating a fluid and for introducing therein a gas in increasing quantity in direct proportion to the flow rate of the fluid, said device comprising a hollow shaft and a roto attached thereto, said rotor comprising two substantially flat discs mounted concentric with said shaft, a plurality of hollow vanes mounted between said flat discs and having substantially radially directed outlet orifices, one of said discs having an opening concentric with said shaft and immediately adjacent thereto whereby said fluid will pass through said concentric opening and out between said vanes, a cavity formed in said rotor and communicating with said hoHow shaft, said vanes having a curved spiral external shape designed to produce a non-turbulent flow of the fluid, and said vanes having therein for introducing the gas within the..'fluid ducts/coHuminicating with said cavity and having a section which increases towards their outlet orifices.
2. A device for circulating a fluid and for introducing therein a gas in increasing quantity in direct proportion to the flow rate of the fluid substantially as hereinbefore described by way of example and with reference to the accompanying drawings. For the Applicants IEBRS IS:CB
IL28602A 1966-10-20 1967-09-05 Device for the circulation and aeration of fluids IL28602A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR80911A FR1504011A (en) 1966-10-20 1966-10-20 Fluid circulation and ventilation device

Publications (1)

Publication Number Publication Date
IL28602A true IL28602A (en) 1972-05-30

Family

ID=8619616

Family Applications (1)

Application Number Title Priority Date Filing Date
IL28602A IL28602A (en) 1966-10-20 1967-09-05 Device for the circulation and aeration of fluids

Country Status (8)

Country Link
US (1) US3485484A (en)
BE (1) BE702093A (en)
ES (1) ES344703A1 (en)
FR (1) FR1504011A (en)
GB (1) GB1192796A (en)
IL (1) IL28602A (en)
SE (1) SE323040B (en)
SU (1) SU574132A3 (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL144368B (en) * 1971-06-21 1974-12-16 Tno CENTRIFUGAL FLUID OF A COMPRESSOR.
AT348953B (en) * 1977-08-26 1979-03-12 Alfa Laval Stalltech DEVICE FOR GASIFICATION AND CIRCULATION OF LIQUIDS
NO142830C (en) * 1978-02-28 1980-10-29 Trondhjems Mek Verksted As DEVICE FOR DISTRIBUTING A GAS IN A FLUID MEDIUM
US4193702A (en) * 1978-09-20 1980-03-18 Davis Philip E Jet mixer and method
CA1101138A (en) * 1979-02-05 1981-05-12 Claudio Guarnaschelli Aerator
SE444970B (en) * 1982-10-11 1986-05-20 Flygt Ab CENTRIFUGAL PUMP WHEEL FOR PROMOTION OF PUMPING OF LIQUID MEDIA CONTAINING POLLUTANTS
DE3635642A1 (en) * 1986-10-20 1988-04-28 Sp K Bjuro Konstruirovaniju T Flotation machine
HU201258B (en) * 1988-04-29 1990-10-28 Energiagazdalkodasi Intezet Rotating-injector turbo mixer for mixing liquid and/or gaseous media
DE4330697C2 (en) * 1993-08-20 1996-10-24 Christian Dipl Ing Nerger Agitator with rotationally symmetrical agitator for suspending and / or for gassing
AT400008B (en) * 1993-09-29 1995-09-25 Frings & Co Heinrich DEVICE FOR ENTERING GAS IN A LIQUID
US5385443A (en) * 1993-10-12 1995-01-31 Les Traitements Des Eaux Poseidon Inc. Centrifugal liquid pump with internal gas injection assembly
US5779439A (en) 1997-04-11 1998-07-14 Les Traitements Des Eaux Poseidon Inc. Centrifugal liquid pump with internal gas injection
DE29818255U1 (en) † 1998-10-13 2000-02-17 Ekato Ruehr Mischtechnik Self-priming, rotating dispersing device
FI115448B (en) * 2001-04-04 2005-05-13 Outokumpu Oy Flotation
WO2007115099A2 (en) * 2006-03-31 2007-10-11 Hills Blair H Apparatus for mixing gasses and liquids
KR100805239B1 (en) * 2006-11-14 2008-02-21 삼성전자주식회사 Humidifying apparatus and airconditioner having the same
RU2518769C1 (en) * 2013-01-23 2014-06-10 Александр Олегович Кудрявцев Turbopump for two fluids
EP4094838A1 (en) * 2021-05-28 2022-11-30 Metso Outotec Finland Oy Rotor of gas dispersion arrangement

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL90265C (en) *
US390508A (en) * 1888-10-02 Draft
US1242445A (en) * 1916-01-06 1917-10-09 Martin H Ittner Apparatus for treating liquids with gases.
FR57337E (en) * 1948-05-05 1953-01-02 Improvements to liquid piston gas compressors
US2743914A (en) * 1950-09-27 1956-05-01 American Instr Co Inc Gas-liquid mixing apparatus
DE920234C (en) * 1952-11-06 1954-11-15 Kuehnle Ag Method and device for protecting the flow-guiding walls of rotating parts against wear and tear by fixed parts
US2918017A (en) * 1956-06-11 1959-12-22 Arthur L Collins Centrifugal pumps
US2888188A (en) * 1956-12-03 1959-05-26 Fuller Co Centrifugal fluid pump
US2920813A (en) * 1958-01-02 1960-01-12 Westinghouse Electric Corp Gas reaction rotors
FR1249881A (en) * 1959-11-20 1961-01-06 Snecma Improvement in fluid compressors

Also Published As

Publication number Publication date
FR1504011A (en) 1967-12-01
SU574132A3 (en) 1977-09-25
BE702093A (en) 1968-01-02
ES344703A1 (en) 1968-10-16
GB1192796A (en) 1970-05-20
SE323040B (en) 1970-04-27
US3485484A (en) 1969-12-23

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