US2313654A - Apparatus for treating liquids with gases - Google Patents
Apparatus for treating liquids with gases Download PDFInfo
- Publication number
- US2313654A US2313654A US366288A US36628840A US2313654A US 2313654 A US2313654 A US 2313654A US 366288 A US366288 A US 366288A US 36628840 A US36628840 A US 36628840A US 2313654 A US2313654 A US 2313654A
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- Prior art keywords
- liquid
- impeller
- gas
- blades
- gases
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
- B01F23/2331—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
- B01F23/23314—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
- B01F23/2334—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements provided with stationary guiding means surrounding at least partially the stirrer
- B01F23/23342—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements provided with stationary guiding means surrounding at least partially the stirrer the stirrer being of the centrifugal type, e.g. with a surrounding stator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/81—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis the stirrers having central axial inflow and substantially radial outflow
- B01F27/812—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis the stirrers having central axial inflow and substantially radial outflow the stirrers co-operating with surrounding stators, or with intermeshing stators, e.g. comprising slits, orifices or screens
-
- 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
- B01F23/23312—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 conduit surrounding the stirrer axis
Definitions
- the present invention is an improveme auxiliaryapathsi the p 1y the hood rmgEnd upvqardiy intothe e ten eiiztheiimpellergand the fiilxiliary bathS b'eing upwardly above the hood ring and dowhwiird lyv-into the-center 2oz ttheimpellen K-gss conduit leads downwardly etoi-arzpomtad j ae'ent to' the eeii tennfzthaimpeller; and th'eT'iiquidmoven'ient pim duc'es ta; low-:pressureiaree near theicnter of t impellen with the'mesultithat.
- inchraeraton piceviouslfi xieferreditd maintained its gas; suctiomcapaeitw substantially mnimpairedi i w-hlleuth z lquid; level; VZHQQ'ifTOHDS iniches 3prhoiv the hood :ring, 0 1 5: inches. aboveaitr, J ustih'ow thei ;fiz, "D Qd e this desiredmesultzisi hotaltogethens certain et present. It is believed that the maine tenanee-of strong. gas suctionadespite wide :vari-..
- Fig. 1 is a partly diagrammatical vertical section showing illustrative apparatus embodying the present invention, the section being taken approximately on the line l-I of Fig. 2.
- Fig. 2 is a horizontal section taken in general on the line 2-2 of Fig. l, a portion of the hood being broken away to expose the construction beneath it.
- Fig. 3 is a vertical section showing the impeller only, the section being taken approximately on the line 3-3 of Fig. 1.
- a tank I adapted to contain the liquid to be processed, is provided with a suitable valved inlet and outlet pipe 2 and with an overflow pipe 3.
- a plurality of rods 6 depend from a superstructure (not shown) and suspend a stationary flow controlling structure designated as a whole by 1.
- a depending vertical shaft 9 carries and supports a rotary impeller designated as a whole by ID.
- Surrounding the shaft 9 is a gas conduit I9 through which gas is adapted to be inducted.
- the support and motor drive for shaft and the support for gas conduit I9 and rods 6 may be of any suitable type as, for example, that disclosed in my prior Patent 1,976,956.
- Thestationary structure 1 comprises a hood member or ring i2 shaped much like the outer portion of an ordinary tin wash basin turned upside down.
- the hood member l2 may be cast of metal and integral with it there may be formed curved deflecting blades i3 which extend vertically downwardly from the hood M.
- the hood may be provided with apertured bosses i4 (four shown) adapted to receive and be clamped to the rods 8 to support the stationary structure 1 and to provide for its accurate vertical location with respect to the impeller.
- the hood may also be cast with bosses 4, 4, which are used only in cases where it is desired to sever the hood ring along line 8, 8 so that the halves can be inserted into a tank through a relatively small manhole.
- the bosses I, 4 are drilled and tapped to receive bolts for clamping the two halves of the hood ring together.
- the hood i2 is provided with a central hole I6 which surorunds the bottom of conduit l9, thereby providing an annular liquid inlet port H.
- liquid to be'treated e. g. vegetable oil
- liquid level such as that illustrated by line 15.
- the impeller shown is of the forward discharge type and in accordance with the present invention the blades 29 are provided with trailing horizontal fins 30. These fins are preferably on the ,lower edges of the blades, and I prefer to have 30 act, as previously pointed out, to give the apparatus more uniform performance, particularly with respect to the gas suction effect occurring throughout a variation of liquid level in the tank.
- impeller as used herein means a rotating device which draws in liquid along lines of fiow substantially parallel to the axis of rotation and discharges the major portion of the liquid in planes substantially perpendicular to the axis of rotation.
- a rotary impeller receives liquid from below and receives gas from above, the liquid and gas being mixed in the impeller and discharged therefrom for circulation in a tank, the major portion of the discharge being in planes substantially perpendicular to the axis of rotation; the improvement which comprises: lower portions of the blades of the impeller being provided with elongated trailing fins extending lengthwise of the blades from adjacent to the center of the impeller to auiacent to the tips of the blades.
- the improvement which comprises: the impeller being of the for.- ward discharge type and having its blades provided with trailing this which reduce the eil'ective intake area from below by approximately 30%.
- the impeller being ,of the forward discharge type and having the lower edges of its blades provided with trailing flns.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Description
i2; aC 2,313,654
APPARATUS FOR TREATING LIQUIDS WITH GASES Filed Nov. 19, 1940 2 Sheets-Sheet l INVENTOR M m Y 5 March 9, 1943. G. MacLEAN 2,313,654
APPARATUS FOR TREATING LIQUIDS WITH GASES Filed Nov. 19, 1940 2 Sheets-Sheet 2 r INVENTOR fiordaiz Ml'L'fliZ M M1- ATTORNEYS Patented Mar. 9, 1943 atfis tmwm us g qnids with;
flfl uid LP iii sus'jiensidh is 'essritielly hendled in the same menn H And, for eoiivenier'icgi heijein' ter ie'ls 'as liquids? Without .ie a u I m eses" i m d mlr actwimhe w n; or Withsolids suspended iii the l'idiiid. Y
The present invention is an improveme auxiliaryapathsi the p 1y the hood rmgEnd upvqardiy intothe e ten eiiztheiimpellergand the fiilxiliary bathS b'eing upwardly above the hood ring and dowhwiird lyv-into the-center 2oz ttheimpellen K-gss conduit leads downwardly etoi-arzpomtad j ae'ent to' the eeii tennfzthaimpeller; and th'eT'iiquidmoven'ient pim duc'es ta; low-:pressureiaree near theicnter of t impellen with the'mesultithat. ga's -is uckd' ddw wagdly1th1oug'iiiethe' vconduit;- and' i z- 'mixed with the iiquidPas, it isgactediuponfiby the'impellenar f --This prior: apparatus: hasb'eenhighlyls icess iceswherenthegliqmd-e leveliinsthe -treatment tail-ill could he maintained; constant? limughoufisthei: Homes/egg with;someepnoeessesizthefiliqy' D QQQ YSQV uid level changes, a by expansion or contna; m f iquid: eza @h mer ite mr R be nvolved vidingihiimpelletl biases;
-n-any such was the iqilid 'le'vel changesdfining the :t'reatment and the aboardtus:tof'fPhtent51,916j956 is sens iti ve flo liquid level change, 'in the': s'ense that the' chang in liquid level-causes the gas: suction eapacity to 'vewob je'ctiofiablyi Whenth'e' fias 'sucti'bn c'apacity be comes impaired; the 'overall efliciencw of the ap-'- paratus is redi1ced', the mo't'or liadihgds varied; snd'the time-of t'reatment is 'piolongedr= ii wAs'Haspecific example: of impairment 'dfgas section; BIL-6811 cite 8; 2'Z inch' senator according tab-Patent 1,916,956 whichaopx aiteweflieiently with the liquid level: l /iiinchesibovth hood il'n but which would'ihaveiits gassuction r eddced by ne i; halfnif the liquid .level idropped' td Vi inch -aboveminor changesin: 13118211385 suctiononna be, occasioned QbYs :variation of the i within;relativelywidevlimitsiwv motion :loadin? and zoverelll waetiommast: ;be;:mlsiirn-fi tainddzat approximatelyioptimifln" iaziueseziespite relatively widewariation si in fiaher liquid level A still further object of the iri iientionfiiito m to? uniformity of performence under varyin' 'co' ditions.
with 'librizontalrail ingafins. constmctionfw-asiarrivediat exfieri mentally .aiter theifai'luneof many other" change F or mod-iflcaitionsi, accomplish the-de'siredi re sult; \Thee'mcacy; of=.the:-.horizonta1z-flns he's beens iamplyatdemonstrated With the finsiddedg'itheii' 27.. inchraeraton piceviouslfi xieferreditd maintained its gas; suctiomcapaeitw substantially mnimpairedi i w-hlleuth z lquid; level; VZHQQ'ifTOHDS iniches 3prhoiv the hood :ring, 0 1 5: inches. aboveaitr, J ustih'ow thei ;fiz, "D Qd e this desiredmesultzisi hotaltogethens certain et present. It is believed that the maine tenanee-of strong. gas suctionadespite wide :vari-.. ations in liquid level is related in some waywta a redistribution of liquid flow, betweemthetop and bottom oL-the imp l er Pl sthe;.esta.b11shment within the impeller of more definite or localized outwardly moving streams of liquid which more eifectively move the gas outwardly as it is drawn into the center of the impeller. However, this does not seem to be a complete explanation as similar results did not follow from other structural changes which would similarly affect the liquid fiow in the impeller.
Fig. 1 is a partly diagrammatical vertical section showing illustrative apparatus embodying the present invention, the section being taken approximately on the line l-I of Fig. 2.
Fig. 2 is a horizontal section taken in general on the line 2-2 of Fig. l, a portion of the hood being broken away to expose the construction beneath it.
Fig. 3 is a vertical section showing the impeller only, the section being taken approximately on the line 3-3 of Fig. 1.
A tank I, adapted to contain the liquid to be processed, is provided with a suitable valved inlet and outlet pipe 2 and with an overflow pipe 3. A plurality of rods 6 (four shown) depend from a superstructure (not shown) and suspend a stationary flow controlling structure designated as a whole by 1. A depending vertical shaft 9 carries and supports a rotary impeller designated as a whole by ID. Surrounding the shaft 9 is a gas conduit I9 through which gas is adapted to be inducted. The support and motor drive for shaft and the support for gas conduit I9 and rods 6 may be of any suitable type as, for example, that disclosed in my prior Patent 1,976,956.
In operation the tank is filled with liquid to be'treated (e. g. vegetable oil) to a depth which will completely submerge the structure 1, giving a liquid level such as that illustrated by line 15.
When the impeller is rotated, it draws liquid up-- wardly from the bottom and also draws liquid downwardly from the top through annular port ii. The flow of liquid through the impeller creates a low pressure zone adjacent the hub of the impeller. Thus, gas is drawn through conduit I! and is entrained with the liquid so that the impeller blades 29 cause streams of mixed gas and liquid to flow outwardly in a substantially horizontal direction to strike deflector blades i3 and be projected downwardly by hood ii. The main paths of circulation are as indicated by arrows A, C, and the auxiliary paths as indicated by arrows A, B.
The impeller shown is of the forward discharge type and in accordance with the present invention the blades 29 are provided with trailing horizontal fins 30. These fins are preferably on the ,lower edges of the blades, and I prefer to have 30 act, as previously pointed out, to give the apparatus more uniform performance, particularly with respect to the gas suction effect occurring throughout a variation of liquid level in the tank.
Also more uniform motor loading, and better overall performance thereby results.
The term impeller as used herein means a rotating device which draws in liquid along lines of fiow substantially parallel to the axis of rotation and discharges the major portion of the liquid in planes substantially perpendicular to the axis of rotation.
Various arrangements and proportions of the fins 30 will produce the desired result in varying degrees but the drawings show the best proportions and arrangement which is now known to me.
I claim:
1. In apparatus for treating liquid with gases of the type in which streams of liquid and gas enter a rotary impeller and are discharged by the impeller for circulation in a tank, the major portion of the discharge being in planes substantially perpendicular to the axis of rotation; the improvement which comprises: blades of the impeller being provided with trailing fins which occupy approximately 30% of the area between the blades.
2. In apparatus for treating liquid with gases of the type in which a rotary impeller receives liquid from below and receives gas from above, the liquid and gas being mixed in the impeller and discharged therefrom for circulation in a tank, the major portion of the discharge being in planes substantially perpendicular to the axis of rotation; the improvement which comprises: lower portions of the blades of the impeller being provided with elongated trailing fins extending lengthwise of the blades from adjacent to the center of the impeller to auiacent to the tips of the blades.
3. In apparatus for treating liquid with gases of the type in which a horizontal rotary impeller receives liquid from below and receives gas from above, the liquid and gas being mixed in the impeller and discharged therefrom for circulation in a tank, the major portion of the discharge being in planes substantially perpendicular to the axis of rotation; the improvement which comprises: lower portions of the blades of the impeller being provided with trailing fins which diminish the effective area of liquid intake from the bottom of the impeller by approximately 30%.
4. In apparatus for treating liquid with gases of the type in which a horizontal rotary impeller receives liquid from below and receives gas from above, the liquid and gas being mixed in the impeller and discharged therefrom for circuthe center of the impeller to adjacent to the tips of the blades and are relatively wide adjacent to the tips of the impeller.
5. Inapparatus for treating liquid with gases of the type in which a tank is provided with a submerged rotary impeller surrounded by a .sub-' merged hooded deflector ring, the impeller acting to draw liquid from below and draw both-liquid and gas from above, the liquid and gas being 'mixed in the'impeller and being discharged.
therefrom into the hooded deflector ring for ensuing circulation in the tank: the improvement which comprises: the impeller being of the for.- ward discharge type and having its blades provided with trailing this which reduce the eil'ective intake area from below by approximately 30%.
6. In apparatus for treating liquid with gases of the type in which a tank isprovided with a submerged rotary impeilersurrounded by afsubmerged hooded deflector ring, the impeller acting to draw liquidirorn below and draw both.
liquid and gas from above, the liquid and gas being mixed in the impeller andbeing discharged thereirom into thehooded deflector ring !or encirculation in the-tank; the improvement which comprises: the impeller being ,of the forward discharge type and having the lower edges of its blades provided with trailing flns.
'7. In apparatus for treating liquid with gases of the type in which a tank is provided with a submerged rotary impeller surrounded by a submerged hooded deflector ring, the impeller acting to draw liquid from below and draw both liquid and gas from above, the liquid and gas being mixed in the impeller and being discharged therefrom into the hooded deflector ring for ensuing circulation in the tank; the improvement which comprises: the impeller having the lower edges oi the blades provided with trailing flns.
' 8. In apparatusior treating liquid with gases of the type in which a tank is provided with a submerged rotary impeller surrounded by a sub merged hooded deflector ring, the impeller act-v ing to-draw liquid from below and draw both liquid and gas from. above, the liquid and gas being mixed in the impeller and being discharged therefrom into the hooded deflector ring for ensuing circulation in the tank; the improvement which comprises: the impeller being of the terward discharge type and having the lower edges of the blades provided with trailing flns extend-' ing throughout the length of the blades, the
' fins being oi substantial width adjacent to the tips of the blades and reducing the eiiective inapproadmate130%.
take area from below by GORDON MACLEAN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US366288A US2313654A (en) | 1940-11-19 | 1940-11-19 | Apparatus for treating liquids with gases |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US366288A US2313654A (en) | 1940-11-19 | 1940-11-19 | Apparatus for treating liquids with gases |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2313654A true US2313654A (en) | 1943-03-09 |
Family
ID=23442419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US366288A Expired - Lifetime US2313654A (en) | 1940-11-19 | 1940-11-19 | Apparatus for treating liquids with gases |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2313654A (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2577095A (en) * | 1946-10-25 | 1951-12-04 | American Well Works | Apparatus for dispersing material in a fluid stream |
| US2719032A (en) * | 1950-08-23 | 1955-09-27 | Ruhrchemie Ag | Treatment of gases with washing liquids |
| US3420370A (en) * | 1963-02-21 | 1969-01-07 | Kloeckner Humboldt Deutz Ag | Froth-flotation cell |
| US3437203A (en) * | 1963-02-20 | 1969-04-08 | Koichi Nakamura | Flotation apparatus |
| US3464552A (en) * | 1967-12-18 | 1969-09-02 | Res & Dev Pty Ltd | Froth flotation apparatus |
| US3642257A (en) * | 1969-03-05 | 1972-02-15 | Kyowa Hakko Kogyo Kk | Agitating apparatus |
| US4240990A (en) * | 1979-04-10 | 1980-12-23 | Aeration Industries, Inc. | Aeration propeller and apparatus |
| US4280911A (en) * | 1978-08-17 | 1981-07-28 | Aeration Industries | Method for treating water |
| US4290886A (en) * | 1979-03-03 | 1981-09-22 | Nagata Seisakusho Co., Ltd. | Flotator |
| US4308221A (en) * | 1978-04-21 | 1981-12-29 | Aeration Industries, Inc. | Apparatus for mixing a gas and a liquid |
| US6135430A (en) * | 1992-08-17 | 2000-10-24 | Praxair Technology, Inc. | Enhanced gas dissolution |
| US6145815A (en) * | 1992-08-17 | 2000-11-14 | Praxair Technology, Inc. | System for enhanced gas dissolution having a hood positioned over the impeller with segregating rings |
| US9675942B1 (en) | 2013-10-15 | 2017-06-13 | Aeration Industries International, LLC. | Universal bridge and wall mounted aeration apparatus |
| US11406943B1 (en) | 2019-06-14 | 2022-08-09 | Aeration Industries International, Llc | Apparatus for treating fluids having improved aeration efficiency and dual function operation |
| US11596907B1 (en) | 2019-06-14 | 2023-03-07 | Aeration Industries International, Llc | Apparatus for treating fluids having improved aeration efficiency and operational durability |
-
1940
- 1940-11-19 US US366288A patent/US2313654A/en not_active Expired - Lifetime
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2577095A (en) * | 1946-10-25 | 1951-12-04 | American Well Works | Apparatus for dispersing material in a fluid stream |
| US2719032A (en) * | 1950-08-23 | 1955-09-27 | Ruhrchemie Ag | Treatment of gases with washing liquids |
| US3437203A (en) * | 1963-02-20 | 1969-04-08 | Koichi Nakamura | Flotation apparatus |
| US3420370A (en) * | 1963-02-21 | 1969-01-07 | Kloeckner Humboldt Deutz Ag | Froth-flotation cell |
| US3464552A (en) * | 1967-12-18 | 1969-09-02 | Res & Dev Pty Ltd | Froth flotation apparatus |
| US3642257A (en) * | 1969-03-05 | 1972-02-15 | Kyowa Hakko Kogyo Kk | Agitating apparatus |
| US4308221A (en) * | 1978-04-21 | 1981-12-29 | Aeration Industries, Inc. | Apparatus for mixing a gas and a liquid |
| US4280911A (en) * | 1978-08-17 | 1981-07-28 | Aeration Industries | Method for treating water |
| US4290886A (en) * | 1979-03-03 | 1981-09-22 | Nagata Seisakusho Co., Ltd. | Flotator |
| US4240990A (en) * | 1979-04-10 | 1980-12-23 | Aeration Industries, Inc. | Aeration propeller and apparatus |
| US6135430A (en) * | 1992-08-17 | 2000-10-24 | Praxair Technology, Inc. | Enhanced gas dissolution |
| US6145815A (en) * | 1992-08-17 | 2000-11-14 | Praxair Technology, Inc. | System for enhanced gas dissolution having a hood positioned over the impeller with segregating rings |
| US9675942B1 (en) | 2013-10-15 | 2017-06-13 | Aeration Industries International, LLC. | Universal bridge and wall mounted aeration apparatus |
| US11406943B1 (en) | 2019-06-14 | 2022-08-09 | Aeration Industries International, Llc | Apparatus for treating fluids having improved aeration efficiency and dual function operation |
| US11596907B1 (en) | 2019-06-14 | 2023-03-07 | Aeration Industries International, Llc | Apparatus for treating fluids having improved aeration efficiency and operational durability |
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