US3592450A - Fluid circulator - Google Patents

Fluid circulator Download PDF

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US3592450A
US3592450A US780722A US3592450DA US3592450A US 3592450 A US3592450 A US 3592450A US 780722 A US780722 A US 780722A US 3592450D A US3592450D A US 3592450DA US 3592450 A US3592450 A US 3592450A
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chamber
siphon
fluid
opening
circulating device
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US780722A
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George Maxwell Rippon
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    • 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
    • B01F23/232—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles
    • B01F23/2323—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles by circulating the flow in guiding constructions or conduits
    • B01F23/23231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles by circulating the flow in guiding constructions or conduits being at least partially immersed in the liquid, e.g. in a closed circuit
    • 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
    • C02F3/22—Activated sludge processes using circulation pipes
    • C02F3/223—Activated sludge processes using circulation pipes using "air-lift"
    • 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
    • B01F23/232—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles
    • B01F23/2323—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles by circulating the flow in guiding constructions or conduits
    • B01F23/23231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles by circulating the flow in guiding constructions or conduits being at least partially immersed in the liquid, e.g. in a closed circuit
    • B01F23/232311—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles by circulating the flow in guiding constructions or conduits being at least partially immersed in the liquid, e.g. in a closed circuit the conduits being vertical draft pipes with a lower intake end and an upper exit end
    • 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
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B01F23/45—Mixing liquids with liquids; Emulsifying using flow mixing
    • B01F23/454—Mixing liquids with liquids; Emulsifying using flow mixing by injecting a mixture of liquid and gas
    • 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
    • B01F33/40—Mixers using gas or liquid agitation, e.g. with air supply tubes
    • B01F33/405—Mixers using gas or liquid agitation, e.g. with air supply tubes in receptacles having guiding conduits therein, e.g. for feeding the gas to the bottom of the receptacle
    • B01F33/4051—Mixers using gas or liquid agitation, e.g. with air supply tubes in receptacles having guiding conduits therein, e.g. for feeding the gas to the bottom of the receptacle with vertical conduits through which the material is being moved upwardly driven by the fluid
    • B01F33/40511—Mixers using gas or liquid agitation, e.g. with air supply tubes in receptacles having guiding conduits therein, e.g. for feeding the gas to the bottom of the receptacle with vertical conduits through which the material is being moved upwardly driven by the fluid with a central conduit or a central set of conduits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/30—Driving arrangements; Transmissions; Couplings; Brakes
    • B01F35/32—Driving arrangements
    • B01F35/32005—Type of drive
    • B01F35/3203—Gas driven
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/712—Feed mechanisms for feeding fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/7176—Feed mechanisms characterised by the means for feeding the components to the mixer using pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/75—Discharge mechanisms
    • B01F35/754—Discharge mechanisms characterised by the means for discharging the components from the mixer
    • B01F35/7547—Discharge mechanisms characterised by the means for discharging the components from the mixer using valves, gates, orifices or openings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/30—Driving arrangements; Transmissions; Couplings; Brakes
    • B01F35/32—Driving arrangements
    • B01F35/32005—Type of drive
    • B01F35/32015—Flow driven
    • 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

Definitions

  • a liquid-circulating device includes a vertical stack submerged in liquid and provided with a large bubble generator adjacent its bottom opening.
  • the bubble generator comprises an open bottomed gas chamber and an inverted tubular siphon including a first vertical leg communicating with the upper part of the chamber, a second leg extending upwardly to a bubble discharge opening above the chamber, and a curved elbow located above the chamber opening.
  • a tubular member is provided for guiding a cleaning tool into the siphon through one of its end openings.
  • the chamber and siphon are enclosed in a casing with openings registering with the chamber opening and siphon discharge opening.
  • the present invention relates generally to improvements in liquid-circulating devices and it relates particularly to an improved large bubble generator in combination with a subnerged stack for effecting the upward lift of liquid in the itack.
  • the buble generators employed therewith possesses im portant draw acks and disadvantages, particularly when employed in the lrculation of liquids having dispersed therein solid matter hich readily settles from the liquid, such as the sludge and aterial which is encountered in the digestion of sewage.
  • the .spersed solid material is drawn from the liquid and settles id accumulates in the bubble generator to block and disable e bubble generator and interrupt the circulation of liquid in e associated stack. It is accordingly necessary periodically to ISII and clean the bubble generators in order to assure the oper functioning thereof.
  • ⁇ nother object of the present invention is to provide an im- IVBCI liquidcirculating device of the bubble lift type.
  • ltill another object of the present invention is to provide an :roved large bubble generator highly useful in submerged :k bubble type of water lifts.
  • I further object of the present invention is to provide an imved large bubble generator which may be easily, rapidly l conveniently cleaned and flushed of accumulated sedibe above and other objects of the of the present invention become apparent from a reading of the following descrip taken in conjunction with the accompanying drawings ch illustrate preferred embodiments thereof.
  • the present invention contemplates the provision fluid circulating device comprising in combination with a ically extending conduit having an upper discharge openand a lower inlet opening submerged in said fluid, means nerged in said fluid for cyclically generating and deliveraubbles to said conduit below the top thereof and includa gas-accumulating chamber having an opening in the :r part thereof, a tubular siphon member including a first ardly extending leg connected at the upper part thereof to chamber and a second upwardly extending leg having an er bubble discharge opening, and an elbow section extendetween the lower parts of said legs and positioned above chamber opening, and means for pumping a gas into said iber.
  • siphon member is substantially U-shaped, with one rojecting above the accumulator chamber and terminat- 1 a discharge opening, the other leg being connected to pper part of the chamber by a horizontal feed pipe comcating with the chamber and in alignment with the ontal leg.
  • the feed pipe functions as a cleaning tool guide 1 tool is pushed through the air delivery pipe.
  • the chamber and siphon are housed in a casing having openings registering with the chamber bottom opening and the siphon discharge opening.
  • An open bottom pipe extends to a point adjacent to the bubble discharge opening and functions as the cleaning tool guide.
  • the improved bubble generator may be easily and rapidly cleaned by pushing and manipulating a cleaning or routing tool such as a suitably dimensioned router carrying snake or the like through the siphon by way of the tool guide
  • a cleaning or routing tool such as a suitably dimensioned router carrying snake or the like
  • the cleaning operation can be effected with little or no interception on the operation ofthe circulating device.
  • FIG. I is a fragmentary elevational view partially in section, of a liquid circulating device embodying the present invennon;
  • FIG. 2 is a sectional view taken along line 2-2 in FIG. 1;
  • FIG. 3 is an elevational view partially broken away, of another embodiment ofthe present invention.
  • FIG. 4 is a sectional view taken along line 44 in FIG. 3;
  • FIG. Si is a sectional view taken along line 5-5 in FIG. 4;
  • FIG. 6 is a fragmentary elevational view of a further em bodiment of the present invention.
  • FIG. 7 is a sectional view taken along line 7-7 in FIG. 6;
  • FIG. 8 is an enlarged sectional view taken along line 88 in FIG. 7.
  • reference numeral I0 generally designates the improved circulating device or pump which is submerged in a body of water I I, such as for example, a sewage digestion pond.
  • the liquid-circulating device I0 includes an open ended vertical conduit or stack 12 of relatively large diameter coaxially mounted atop and communicating with a hollow open ended frustoconical support I3 resting on the bottom of the pond and provided with a plurality ofinlet ports.
  • a large bu bble generator I4 constructed in accordance with the present invention, is coaxially positioned proximate the bottom open ing of stack 12 so that bubbles produced thereby enter the bottom of stack [2 and rise therein.
  • Bubble generator 14 comprises a vertical cylindrical ballast body member 16 having a large coaxial bore formed therein which is open at its bottom and closed at its top to define a gas-accumulating chamber 17.
  • An inverted tubular siphon I9 is imbedded in ballast member 16 and includes a smoothly curved, preferably arcuate, bottom crossarm 20 positioned a short distance above the bottom of chamber I7 and transversely offset therefrom.
  • a first leg 2! extends vertically upwardly from one side of crossarm 20 and communicates with the upper part of chamber 17 by a radially extending upwardly inwardly inclined tubular leg 22 joining vertical leg 21 by a curved elbow 23, leg 22 comm unicating with chamber [7 at a point diametrically opposing the point of entry of pipe 18.
  • a second leg 24 extends vertically upwardly from the other side ofcrossarm 20 and projects vertically upwardly above the top of chamber I7 terminating in a top bubble discharge opening 26.
  • siphon 19 in the event siphon 19 becomes blocked or clogged by solid materials from the ambient liquid settling and accumulating therein it may be rapidly and readily cleared by pushing a long flexible cleaning rod or tool through the remote end of pipe 18.
  • the tool is advanced across the chamber [7 into the siphon leg 22 and along the full length of siphon 19 through discharge opening 26 to push the accumulated matter through siphon l9 and discharged opening 26.
  • the tool may be reciprocated and manipulated in known manner to assure the complete cleaning of the siphon
  • the tool is then removed and the generator reactivated. it should be noted that if the tool is inserted into pipe 18 through a communicating restricted passageway which limits the escape of air, the flow of air to generator 14 need not be stopped during the cleaning operanon.
  • FIGS. 3 to 5 there is illustrated another form ofimproved bubble generator 27 which comprises a cylindrical casing 28 having a bottom wall 29 and a frustoconical top wall 30 open at the apex thereof.
  • Eccentrically housed in casing 28 is a vertical cylindrical chamber 32 secured to bottom wall 29 and having an open bottom end registering with a coinciding open- :ng in bottom wall 29.
  • a smoothly curved inverted tubular siphon 33 is also housed in casing 28 and includes an arcuate bottom crossarm 34 located shortly above bottom wall 29 and :onnected by a vertically extending leg 36 to an upwardly inwardly inclined tubular arm 37 which terminates in an open :opped vertical section projecting through the opening in top wall 30.
  • crossarm 34 is connected to a verti- :ally extending leg 38 which communicates with the upper Jart of chamber 32 by way of an upwardly inwardly curved leg 39 which joins chamber 32 in a horizontal radial direction.
  • a guide functioning air pipe 40 projects through peripheral walls of casing 28 and chamber 32 at the upper part of the atter, the section of pipe 40 proximate the chamber 32 being )pposite to and in diametric alignment with the upper end )pening of siphon leg 39.
  • Pipe 40 is connected to a source of :ompressed air in the manner ofpipe 18 as set forth above.
  • the bubble generator 27 operates in the manner of bubble generator 14 and may be cleaned in the manner described ibove.
  • FIGS. 6 to 8 of the drawings there is illustrated another orm of bubble generator 41 differing from that last described )rincipally in the air feed arrangement and the cleaning tool guide structure.
  • an open bottomed cylindrical :hamber 42 with a top wall 43 is eccentrically housed in a :ylindrical casing 44 having a centrally apertured frustoconi- :a] top wall 46 and a bottom wall with an opening registering vith the open bottom of chamber 42.
  • a smooth curved inerted tubular siphon 47 of the configuration of earlier lescribed siphon 33 extends between the upper part of :hamber 42 and the aperture in wall 46.
  • a vertical air feed pipe 48 communicates with chamber 42 hrough top wall 43 and projects upwardly through casing wall I to a suitable air pump.
  • a tool guide pipe 49 Secured to, as by welding, and exending along the length of pipe 48 is a tool guide pipe 49 havng a bottom opening 50 shortly above and adjacent to top iubble discharge opening 51 of siphon 47.
  • An inclined guide ilate 52 underlies guide pipe opening 50 and is secured to and :xtends downwardly from the outer bottom edge ofguide pipe lllover the edge ofand into siphon discharge opening l.
  • Bubble generator 41 operates in the manner of bubble generators l4 and 27, as described above. in the event siphon 47 becomes restricted or clogged, a flexible cleaning tool or router is pushed down tube 49 and is deflected by plate 52 into siphon discharge opening 5
  • a fluidcirculating device comprising, in combination with a vertically extending conduit having an upper discharge opening and a lower inlet opening submerged in said fluid, means submerged in said fluid for cyclically generating and delivering bubbles to said conduit below the top thereof and including a gas-accumulating chamber having an opening in the lower part thereof, a linearly extending tubular siphon member including a first upwardly extending tubular leg con nected at the upper part thereof to said chamber and a second upwardly extending tubular leg horizontally spaced from said first leg and having an upper bubble discharge opening, and a curved tubular crossarm extending between the lower parts of said legs and positioned above said chamber opening, and means for pumping a gas into said chamber.
  • the fluid-circulating device of claim 1 including means for guiding a cleaning tool into said siphon tube.
  • siphon member terminates respectively in an inlet opening communicating with said chamber and an outlet opening defining said bubble discharge opening respectively, and means for guiding a cleaning tool into at least one of said openings.
  • said tool guiding means comprising a guide tube directed toward one of said siphon member openings from the outside thereof.
  • the fluid-circulating device of claim 4 including a horizontal extending tubular leg connecting the upper part of said siphon first leg with said chamber, said tool guide comprising a pipe aligned with said horizontal tubular leg and communicating with said chamber at a point opposing said horizontally extending leg and connected to said gas-pumping means.
  • said guide means comprising a vertically extending guide tube having a bottom opening adjacent and transversely offset relative to said siphon discharge opening.
  • the fluid-circulating device of claim 1 including a casing of greater transverse dimensions than and housing said chamber and siphon member, said casing having a bottom opening registering with said chamber bottom opening and a top opening registering with said siphon discharge opening.

Abstract

A liquid-circulating device includes a vertical stack submerged in liquid and provided with a large bubble generator adjacent its bottom opening. The bubble generator comprises an open bottomed gas chamber and an inverted tubular siphon including a first vertical leg communicating with the upper part of the chamber, a second leg extending upwardly to a bubble discharge opening above the chamber, and a curved elbow located above the chamber opening. A tubular member is provided for guiding a cleaning tool into the siphon through one of its end openings. The chamber and siphon are enclosed in a casing with openings registering with the chamber opening and siphon discharge opening.

Description

United States Patent Primary Examiner-Tim R. Miles Anorney-William R. Liberman ABSTRACT: A liquid-circulating device includes a vertical stack submerged in liquid and provided with a large bubble generator adjacent its bottom opening. The bubble generator comprises an open bottomed gas chamber and an inverted tubular siphon including a first vertical leg communicating with the upper part of the chamber, a second leg extending upwardly to a bubble discharge opening above the chamber, and a curved elbow located above the chamber opening. A tubular member is provided for guiding a cleaning tool into the siphon through one of its end openings. The chamber and siphon are enclosed in a casing with openings registering with the chamber opening and siphon discharge opening.
PATENTED JUL 1 3 I971 SHEEI 1 BF 2 manila. flaw.
ATTORNEY PATENTED Jun 3 1971 SHEET 2 BF 2 BY 5 g ATTORNEY TlckE- FLUID CIRCULATOR BACKGROUND OF THE INVENTION The present invention relates generally to improvements in liquid-circulating devices and it relates particularly to an improved large bubble generator in combination with a subnerged stack for effecting the upward lift of liquid in the itack.
The ability has long been known to circulate liquids in large indies thereof by submerging one or more open ended vertiral stacks or conduits in the body ofliquid and cyclically formng large bubbles at the bottom of the stacks, each ofthe bubiles occupying substantially the full transverse cross section of he stack and rising therein to function as pistons to lift the quid in the stacks and discharge it from the tops of the stacks hereby effecting the circulation and aeration of the liquid. lhile these devices are generally highly satisfactory the buble generators employed therewith possesses im portant draw acks and disadvantages, particularly when employed in the lrculation of liquids having dispersed therein solid matter hich readily settles from the liquid, such as the sludge and aterial which is encountered in the digestion of sewage. The .spersed solid material is drawn from the liquid and settles id accumulates in the bubble generator to block and disable e bubble generator and interrupt the circulation of liquid in e associated stack. It is accordingly necessary periodically to ISII and clean the bubble generators in order to assure the oper functioning thereof. However, with the bubble generars heretofore available and proposed the cleaning and flushg operation is highly inefficient, time consuming and inconnient, and requires an extended interruption in the operan of the respective circulating device, with a consequent iuction in the overall efficiency and capacity of the as- :iated system.
SUMMARY OF THE INVENTION it is a principal object of the present invention to provide an proved liquid-circulating de'vice.
\nother object of the present invention is to provide an im- IVBCI liquidcirculating device of the bubble lift type.
ltill another object of the present invention is to provide an :roved large bubble generator highly useful in submerged :k bubble type of water lifts.
I further object of the present invention is to provide an imved large bubble generator which may be easily, rapidly l conveniently cleaned and flushed of accumulated sedibe above and other objects of the of the present invention become apparent from a reading of the following descrip taken in conjunction with the accompanying drawings ch illustrate preferred embodiments thereof.
| a sense, the present invention contemplates the provision fluid circulating device comprising in combination with a ically extending conduit having an upper discharge openand a lower inlet opening submerged in said fluid, means nerged in said fluid for cyclically generating and deliveraubbles to said conduit below the top thereof and includa gas-accumulating chamber having an opening in the :r part thereof, a tubular siphon member including a first ardly extending leg connected at the upper part thereof to chamber and a second upwardly extending leg having an er bubble discharge opening, and an elbow section extendetween the lower parts of said legs and positioned above chamber opening, and means for pumping a gas into said iber. According to an embodiment of the present inventhe siphon member is substantially U-shaped, with one rojecting above the accumulator chamber and terminat- 1 a discharge opening, the other leg being connected to pper part of the chamber by a horizontal feed pipe comcating with the chamber and in alignment with the ontal leg. The feed pipe functions as a cleaning tool guide 1 tool is pushed through the air delivery pipe. In accordance with another embodiment of the present invention, the chamber and siphon are housed in a casing having openings registering with the chamber bottom opening and the siphon discharge opening. An open bottom pipe extends to a point adjacent to the bubble discharge opening and functions as the cleaning tool guide.
The improved bubble generator may be easily and rapidly cleaned by pushing and manipulating a cleaning or routing tool such as a suitably dimensioned router carrying snake or the like through the siphon by way of the tool guide The cleaning operation can be effected with little or no interception on the operation ofthe circulating device.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. I is a fragmentary elevational view partially in section, of a liquid circulating device embodying the present invennon;
FIG. 2 is a sectional view taken along line 2-2 in FIG. 1;
FIG. 3 is an elevational view partially broken away, of another embodiment ofthe present invention;
FIG. 4 is a sectional view taken along line 44 in FIG. 3;
FIG. Sis a sectional view taken along line 5-5 in FIG. 4;
FIG. 6 is a fragmentary elevational view of a further em bodiment of the present invention;
FIG. 7 is a sectional view taken along line 7-7 in FIG. 6; and
FIG. 8 is an enlarged sectional view taken along line 88 in FIG. 7.
DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to the drawings, and particularly FIGS. 1 and 2 thereof which illustrate a preferred embodiment of the present invention, reference numeral I0 generally designates the improved circulating device or pump which is submerged in a body of water I I, such as for example, a sewage digestion pond. The liquid-circulating device I0 includes an open ended vertical conduit or stack 12 of relatively large diameter coaxially mounted atop and communicating with a hollow open ended frustoconical support I3 resting on the bottom of the pond and provided with a plurality ofinlet ports. A large bu bble generator I4, constructed in accordance with the present invention, is coaxially positioned proximate the bottom open ing of stack 12 so that bubbles produced thereby enter the bottom of stack [2 and rise therein.
Bubble generator 14 comprises a vertical cylindrical ballast body member 16 having a large coaxial bore formed therein which is open at its bottom and closed at its top to define a gas-accumulating chamber 17. A gas feed pipe I8, which also functions as a cleaning or routing tool guide, extends radially from the the upper part of chamber I7 through ballast I6 and is connected by an associated pipe to a suitable gas pump. Access is provided at a part of pipe 18 remote from chamber [7 for the insertion of a flexible cleaning tool such as a snake or the like, for example by way of a separable coupling or an opening in the pipe closed by a separable plug or cap.
An inverted tubular siphon I9 is imbedded in ballast member 16 and includes a smoothly curved, preferably arcuate, bottom crossarm 20 positioned a short distance above the bottom of chamber I7 and transversely offset therefrom. A first leg 2! extends vertically upwardly from one side of crossarm 20 and communicates with the upper part of chamber 17 by a radially extending upwardly inwardly inclined tubular leg 22 joining vertical leg 21 by a curved elbow 23, leg 22 comm unicating with chamber [7 at a point diametrically opposing the point of entry of pipe 18. A second leg 24 extends vertically upwardly from the other side ofcrossarm 20 and projects vertically upwardly above the top of chamber I7 terminating in a top bubble discharge opening 26.
In operation, air is pumped into chamber I7 through pipe I8 to displace the liquid in chamber 17 and leg 21 until the air level therein drops below the upper part of the crossarm 20 at which time the accumulated airis rapidly siphoned through leg 24 and is discharged through opening 26 to form a large bubble ofa diameter approximately that of stack 12 The bubble separates from generator [4 and rises in stack 12 to raise the water therein, in the known manner. Bubbles are cyclically produced at a rate determined by the rate of air delivery.
in the event siphon 19 becomes blocked or clogged by solid materials from the ambient liquid settling and accumulating therein it may be rapidly and readily cleared by pushing a long flexible cleaning rod or tool through the remote end of pipe 18. The tool is advanced across the chamber [7 into the siphon leg 22 and along the full length of siphon 19 through discharge opening 26 to push the accumulated matter through siphon l9 and discharged opening 26. The tool may be reciprocated and manipulated in known manner to assure the complete cleaning of the siphon The tool is then removed and the generator reactivated. it should be noted that if the tool is inserted into pipe 18 through a communicating restricted passageway which limits the escape of air, the flow of air to generator 14 need not be stopped during the cleaning operanon.
ln FIGS. 3 to 5 there is illustrated another form ofimproved bubble generator 27 which comprises a cylindrical casing 28 having a bottom wall 29 and a frustoconical top wall 30 open at the apex thereof. Eccentrically housed in casing 28 is a vertical cylindrical chamber 32 secured to bottom wall 29 and having an open bottom end registering with a coinciding open- :ng in bottom wall 29. A smoothly curved inverted tubular siphon 33 is also housed in casing 28 and includes an arcuate bottom crossarm 34 located shortly above bottom wall 29 and :onnected by a vertically extending leg 36 to an upwardly inwardly inclined tubular arm 37 which terminates in an open :opped vertical section projecting through the opening in top wall 30. The other end of crossarm 34 is connected to a verti- :ally extending leg 38 which communicates with the upper Jart of chamber 32 by way of an upwardly inwardly curved leg 39 which joins chamber 32 in a horizontal radial direction. A guide functioning air pipe 40 projects through peripheral walls of casing 28 and chamber 32 at the upper part of the atter, the section of pipe 40 proximate the chamber 32 being )pposite to and in diametric alignment with the upper end )pening of siphon leg 39. Pipe 40 is connected to a source of :ompressed air in the manner ofpipe 18 as set forth above.
The bubble generator 27 operates in the manner of bubble generator 14 and may be cleaned in the manner described ibove.
in FIGS. 6 to 8 of the drawings there is illustrated another orm of bubble generator 41 differing from that last described )rincipally in the air feed arrangement and the cleaning tool guide structure. Specifically, an open bottomed cylindrical :hamber 42 with a top wall 43 is eccentrically housed in a :ylindrical casing 44 having a centrally apertured frustoconi- :a] top wall 46 and a bottom wall with an opening registering vith the open bottom of chamber 42. A smooth curved inerted tubular siphon 47 of the configuration of earlier lescribed siphon 33 extends between the upper part of :hamber 42 and the aperture in wall 46.
A vertical air feed pipe 48 communicates with chamber 42 hrough top wall 43 and projects upwardly through casing wall I to a suitable air pump. Secured to, as by welding, and exending along the length of pipe 48 is a tool guide pipe 49 havng a bottom opening 50 shortly above and adjacent to top iubble discharge opening 51 of siphon 47. An inclined guide ilate 52 underlies guide pipe opening 50 and is secured to and :xtends downwardly from the outer bottom edge ofguide pipe lllover the edge ofand into siphon discharge opening l.
Bubble generator 41 operates in the manner of bubble generators l4 and 27, as described above. in the event siphon 47 becomes restricted or clogged, a flexible cleaning tool or router is pushed down tube 49 and is deflected by plate 52 into siphon discharge opening 5|. The cleaning tool is suitably advanced and manipulated through the full length of siphon 47 to clean and push solid clogging material therein into chamber 42, the material dropping through the open bottom of chamber 42.
While there have been described and illustrated preferred embodiments of the present invention it is apparent that nu merous alternations. omissions and additions may be made without departing from the spirit thereof.
What I claimed is:
I. A fluidcirculating device comprising, in combination with a vertically extending conduit having an upper discharge opening and a lower inlet opening submerged in said fluid, means submerged in said fluid for cyclically generating and delivering bubbles to said conduit below the top thereof and including a gas-accumulating chamber having an opening in the lower part thereof, a linearly extending tubular siphon member including a first upwardly extending tubular leg con nected at the upper part thereof to said chamber and a second upwardly extending tubular leg horizontally spaced from said first leg and having an upper bubble discharge opening, and a curved tubular crossarm extending between the lower parts of said legs and positioned above said chamber opening, and means for pumping a gas into said chamber.
2. The fluid-circulating device of claim 1 including means for guiding a cleaning tool into said siphon tube.
3. The fluid-circulating device of claim 2, wherein the cleaning tool guiding means comprise the conduit for the movement ofgas from the pump into the chamber.
4. The fluidcirculating device of claim I, wherein said siphon member terminates respectively in an inlet opening communicating with said chamber and an outlet opening defining said bubble discharge opening respectively, and means for guiding a cleaning tool into at least one of said openings.
5. The fluid-circulating device of claim 4 said tool guiding means comprising a guide tube directed toward one of said siphon member openings from the outside thereof.
6. The fluid-circulating device of claim 4, including a horizontal extending tubular leg connecting the upper part of said siphon first leg with said chamber, said tool guide comprising a pipe aligned with said horizontal tubular leg and communicating with said chamber at a point opposing said horizontally extending leg and connected to said gas-pumping means.
7. The fluid-circulating device of claim 4 said guide means comprising a vertically extending guide tube having a bottom opening adjacent and transversely offset relative to said siphon discharge opening.
8. The fluid-circulating device of claim 1, including a casing of greater transverse dimensions than and housing said chamber and siphon member, said casing having a bottom opening registering with said chamber bottom opening and a top opening registering with said siphon discharge opening.
9. The fluid-circulating device of claim 8, wherein said casing is of cylindrical configuration, said chamber being transversely offset relative to the longitudinal axis of said casing, and said siphon discharge opening being coaxial with said casing.
10 The fluid-circulating device of claim I wherein said siphon discharge opening is at a level above the top of said chamber.

Claims (10)

1. A fluid-circulating device comprising, in combination with a vertically extending conduit having an upper discharge opening and a lower inlet opening submerged in said fluid, means submerged in said fluid for cyclically generating and delivering bubbles to said conduit below the top thereof and including a gas-accumulating chamber having an opening in the lower part thereof, a linearly extending tubular siphon member including a first upwardly extending tubular leg connected at the upper part thereof to said chamber and a second upwardly extending tubular leg horizontally spaced from said first leg and having an upper bubble discharge opening, and a curved tubular crossarm extending between the lower parts of said legs and positioned above said chamber opening, and means for pumping a gas into said chamber.
2. The fluid-circulating device of claim 1 including means for guiding a cleaning tool into said siphon tube.
3. The fluid-circulating device of claim 2, wherein the cleaning tool guiding means comprise the conduit for the movement of gas from the pump into the chamber.
4. The fluid-circulating device of claim 1, wherein said siphon member terminates respectively in an inlet opening communicating with said chamber and an outlet opening defining said bubble discharge opening respectively, and means for guiding a cleaning tool into at least one of said openings.
5. The fluid-circulating device of claim 4 said tool guiding means comprising a guide tube directed toward one of said siphon member openings from the outside thereof.
6. The fluid-circulating device of claim 4, including a horizontal extending tubular leg connecting the upper part of said siphon first leg with said chamber, said tool guide comprising a pipe aligned with said horizontal tubular leg and communicating with said chamber at a point opposing said horizontally extending leg and connected to said gas-pumping means.
7. The fluid-circulating device of claim 4 said guide means comprising a vertically extending guide tube having a bottom opening adjacent and transversely offset relative to said siphon discharge opening.
8. The fluid-circulating device of claim 1, including a casing of greater transverse dimensions than and housing said chamber and siphon member, said casing having a bottom opening registering with said chamber bottom opening and a top opening registering with said siphon Discharge opening.
9. The fluid-circulating device of claim 8, wherein said casing is of cylindrical configuration, said chamber being transversely offset relative to the longitudinal axis of said casing, and said siphon discharge opening being coaxial with said casing.
10. The fluid-circulating device of claim 1 wherein said siphon discharge opening is at a level above the top of said chamber.
US780722A 1969-12-03 1969-12-03 Fluid circulator Expired - Lifetime US3592450A (en)

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Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3679187A (en) * 1970-06-03 1972-07-25 Mansel W Smith Air diffusion apparatus for the treatment of polluted water
US4169873A (en) * 1976-12-13 1979-10-02 Aero-Hydraulics Corporation Fluid circulating device
US4187263A (en) * 1979-01-15 1980-02-05 Aero-Hydraulics Corporation Liquid circulating device
US4293506A (en) * 1979-01-15 1981-10-06 Atara Corporation Liquid circulating device
US4356131A (en) * 1981-01-29 1982-10-26 Atara Corporation Circulating device for liquids containing long-chain molecules
US4421696A (en) * 1981-04-10 1983-12-20 Graue William D Gas diffuser
US4518543A (en) * 1981-07-31 1985-05-21 Gunter Grittmann Device for the dosed diffusion of gases in liquids
WO1985003458A1 (en) * 1984-02-06 1985-08-15 Parks Richard E Method and apparatus for gas induced mixing and blending
US4569804A (en) * 1985-02-13 1986-02-11 Atara Corporation Large bubble flow generator-interface for liquid circulating device
US4595296A (en) * 1984-02-06 1986-06-17 Parks Richard E Method and apparatus for gas induced mixing and blending
US4752421A (en) * 1986-04-01 1988-06-21 Kaiyo Kogyo Kabushiki Kaisha Method of supplying air masses and producing jets of water
US4789503A (en) * 1987-06-15 1988-12-06 Atara Corporation Air removal snorkel device
US4828696A (en) * 1984-04-23 1989-05-09 Kaiyo Kogyo Kabushiki Kaisha Water aeration apparatus
US4911838A (en) * 1987-02-27 1990-03-27 Kabushiki Kobe Seiko Sho Pluri-tubular aerator
US20090279381A1 (en) * 2008-05-12 2009-11-12 Koopmans Richard J Water tank deicing mixer
US20100300968A1 (en) * 2009-06-02 2010-12-02 Siemens Water Technologies Corp. Membrane cleaning with pulsed gas slugs
US20110049047A1 (en) * 2009-09-03 2011-03-03 Jeff Cumin Gas sparger for an immersed membrane
US8876089B2 (en) 2011-09-15 2014-11-04 Zenon Technology Partnership Method and apparatus to keep an aerator full of air
US9022224B2 (en) 2010-09-24 2015-05-05 Evoqua Water Technologies Llc Fluid control manifold for membrane filtration system
US9023206B2 (en) 2008-07-24 2015-05-05 Evoqua Water Technologies Llc Frame system for membrane filtration modules
US9206057B2 (en) 2007-05-29 2015-12-08 Evoqua Water Technologies Llc Membrane cleaning with pulsed airlift pump
US9364805B2 (en) 2010-10-15 2016-06-14 General Electric Company Integrated gas sparger for an immersed membrane
US9463419B2 (en) 2012-01-09 2016-10-11 General Electric Company Pulse aeration for immersed membranes
US9533261B2 (en) 2012-06-28 2017-01-03 Evoqua Water Technologies Llc Potting method
US9604166B2 (en) 2011-09-30 2017-03-28 Evoqua Water Technologies Llc Manifold arrangement
US9764288B2 (en) 2007-04-04 2017-09-19 Evoqua Water Technologies Llc Membrane module protection
US9764289B2 (en) 2012-09-26 2017-09-19 Evoqua Water Technologies Llc Membrane securement device
US9815027B2 (en) 2012-09-27 2017-11-14 Evoqua Water Technologies Llc Gas scouring apparatus for immersed membranes
US9914097B2 (en) 2010-04-30 2018-03-13 Evoqua Water Technologies Llc Fluid flow distribution device
US9925499B2 (en) 2011-09-30 2018-03-27 Evoqua Water Technologies Llc Isolation valve with seal for end cap of a filtration system
US9962865B2 (en) 2012-09-26 2018-05-08 Evoqua Water Technologies Llc Membrane potting methods
US10179311B2 (en) * 2014-03-25 2019-01-15 Sumitomo Electric Industries, Ltd. Intermittent-bubbling equipment
US10322375B2 (en) 2015-07-14 2019-06-18 Evoqua Water Technologies Llc Aeration device for filtration system
US10427102B2 (en) 2013-10-02 2019-10-01 Evoqua Water Technologies Llc Method and device for repairing a membrane filtration module
US11560327B2 (en) * 2018-04-11 2023-01-24 Pulsed Burst Systems Llc Bubble generator

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1495304A (en) * 1921-06-10 1924-05-27 Michael J Heidelberg Pipe-cleaning device
US1982402A (en) * 1933-07-17 1934-11-27 John T Shade Guide for pipe cleaning devices
US2201733A (en) * 1936-02-17 1940-05-21 Karl J Kollmann Boring machine
US2767415A (en) * 1954-04-20 1956-10-23 Pittsburgh Pipe Cleaner Compan Pipe cleaning apparatus for gas lines
US3148509A (en) * 1960-10-24 1964-09-15 Pneumatic Breakwaters Ltd Wave reduction, de-icing and destratification apparatus
US3246761A (en) * 1962-10-30 1966-04-19 Bryan John Gordon Liquid treating apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1495304A (en) * 1921-06-10 1924-05-27 Michael J Heidelberg Pipe-cleaning device
US1982402A (en) * 1933-07-17 1934-11-27 John T Shade Guide for pipe cleaning devices
US2201733A (en) * 1936-02-17 1940-05-21 Karl J Kollmann Boring machine
US2767415A (en) * 1954-04-20 1956-10-23 Pittsburgh Pipe Cleaner Compan Pipe cleaning apparatus for gas lines
US3148509A (en) * 1960-10-24 1964-09-15 Pneumatic Breakwaters Ltd Wave reduction, de-icing and destratification apparatus
US3246761A (en) * 1962-10-30 1966-04-19 Bryan John Gordon Liquid treating apparatus

Cited By (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3679187A (en) * 1970-06-03 1972-07-25 Mansel W Smith Air diffusion apparatus for the treatment of polluted water
US4169873A (en) * 1976-12-13 1979-10-02 Aero-Hydraulics Corporation Fluid circulating device
US4187263A (en) * 1979-01-15 1980-02-05 Aero-Hydraulics Corporation Liquid circulating device
US4293506A (en) * 1979-01-15 1981-10-06 Atara Corporation Liquid circulating device
US4356131A (en) * 1981-01-29 1982-10-26 Atara Corporation Circulating device for liquids containing long-chain molecules
US4421696A (en) * 1981-04-10 1983-12-20 Graue William D Gas diffuser
US4518543A (en) * 1981-07-31 1985-05-21 Gunter Grittmann Device for the dosed diffusion of gases in liquids
WO1985003458A1 (en) * 1984-02-06 1985-08-15 Parks Richard E Method and apparatus for gas induced mixing and blending
US4595296A (en) * 1984-02-06 1986-06-17 Parks Richard E Method and apparatus for gas induced mixing and blending
US4828696A (en) * 1984-04-23 1989-05-09 Kaiyo Kogyo Kabushiki Kaisha Water aeration apparatus
US4906363A (en) * 1984-04-23 1990-03-06 Kaiyo Kogyo Kabushiki Kaisha Water aeration apparatus
US4569804A (en) * 1985-02-13 1986-02-11 Atara Corporation Large bubble flow generator-interface for liquid circulating device
US4752421A (en) * 1986-04-01 1988-06-21 Kaiyo Kogyo Kabushiki Kaisha Method of supplying air masses and producing jets of water
US4911838A (en) * 1987-02-27 1990-03-27 Kabushiki Kobe Seiko Sho Pluri-tubular aerator
US4789503A (en) * 1987-06-15 1988-12-06 Atara Corporation Air removal snorkel device
US9764288B2 (en) 2007-04-04 2017-09-19 Evoqua Water Technologies Llc Membrane module protection
US10507431B2 (en) 2007-05-29 2019-12-17 Evoqua Water Technologies Llc Membrane cleaning with pulsed airlift pump
US9573824B2 (en) 2007-05-29 2017-02-21 Evoqua Water Technologies Llc Membrane cleaning with pulsed airlift pump
US9206057B2 (en) 2007-05-29 2015-12-08 Evoqua Water Technologies Llc Membrane cleaning with pulsed airlift pump
US20090279381A1 (en) * 2008-05-12 2009-11-12 Koopmans Richard J Water tank deicing mixer
US8147117B2 (en) * 2008-05-12 2012-04-03 Drewry Kristinn G Water tank deicing mixer
US9023206B2 (en) 2008-07-24 2015-05-05 Evoqua Water Technologies Llc Frame system for membrane filtration modules
US20100300968A1 (en) * 2009-06-02 2010-12-02 Siemens Water Technologies Corp. Membrane cleaning with pulsed gas slugs
US9433903B2 (en) 2009-09-03 2016-09-06 Zenon Technology Partnership Gas sparger for a filtering membrane
US9358505B2 (en) 2009-09-03 2016-06-07 General Electric Company Gas sparger for an immersed membrane
US11219866B2 (en) * 2009-09-03 2022-01-11 Bl Technologies, Inc. Gas sparger for an immersed membrane
US20110049047A1 (en) * 2009-09-03 2011-03-03 Jeff Cumin Gas sparger for an immersed membrane
US10471393B2 (en) 2009-09-03 2019-11-12 Bl Technologies, Inc. Gas sparger for an immersed membrane
US10441920B2 (en) 2010-04-30 2019-10-15 Evoqua Water Technologies Llc Fluid flow distribution device
US9914097B2 (en) 2010-04-30 2018-03-13 Evoqua Water Technologies Llc Fluid flow distribution device
US9022224B2 (en) 2010-09-24 2015-05-05 Evoqua Water Technologies Llc Fluid control manifold for membrane filtration system
US9630147B2 (en) 2010-09-24 2017-04-25 Evoqua Water Technologies Llc Fluid control manifold for membrane filtration system
US9364805B2 (en) 2010-10-15 2016-06-14 General Electric Company Integrated gas sparger for an immersed membrane
EP2627438A4 (en) * 2010-10-15 2017-10-18 General Electric Company Integrated gas sparger for an immersed membrane
US10173175B2 (en) 2010-10-15 2019-01-08 Bl Technologies, Inc. Integrated gas sparger for an immersed membrane
US8876089B2 (en) 2011-09-15 2014-11-04 Zenon Technology Partnership Method and apparatus to keep an aerator full of air
US9925499B2 (en) 2011-09-30 2018-03-27 Evoqua Water Technologies Llc Isolation valve with seal for end cap of a filtration system
US9604166B2 (en) 2011-09-30 2017-03-28 Evoqua Water Technologies Llc Manifold arrangement
US11065569B2 (en) 2011-09-30 2021-07-20 Rohm And Haas Electronic Materials Singapore Pte. Ltd. Manifold arrangement
US10391432B2 (en) 2011-09-30 2019-08-27 Evoqua Water Technologies Llc Manifold arrangement
US9463419B2 (en) 2012-01-09 2016-10-11 General Electric Company Pulse aeration for immersed membranes
US9533261B2 (en) 2012-06-28 2017-01-03 Evoqua Water Technologies Llc Potting method
US9764289B2 (en) 2012-09-26 2017-09-19 Evoqua Water Technologies Llc Membrane securement device
US9962865B2 (en) 2012-09-26 2018-05-08 Evoqua Water Technologies Llc Membrane potting methods
US9815027B2 (en) 2012-09-27 2017-11-14 Evoqua Water Technologies Llc Gas scouring apparatus for immersed membranes
US10427102B2 (en) 2013-10-02 2019-10-01 Evoqua Water Technologies Llc Method and device for repairing a membrane filtration module
US11173453B2 (en) 2013-10-02 2021-11-16 Rohm And Haas Electronic Materials Singapores Method and device for repairing a membrane filtration module
US10179311B2 (en) * 2014-03-25 2019-01-15 Sumitomo Electric Industries, Ltd. Intermittent-bubbling equipment
US10322375B2 (en) 2015-07-14 2019-06-18 Evoqua Water Technologies Llc Aeration device for filtration system
US11560327B2 (en) * 2018-04-11 2023-01-24 Pulsed Burst Systems Llc Bubble generator

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