DK147234B - AERATOR - Google Patents
AERATOR Download PDFInfo
- Publication number
- DK147234B DK147234B DK006077AA DK6077A DK147234B DK 147234 B DK147234 B DK 147234B DK 006077A A DK006077A A DK 006077AA DK 6077 A DK6077 A DK 6077A DK 147234 B DK147234 B DK 147234B
- Authority
- DK
- Denmark
- Prior art keywords
- vane
- plate
- aerator
- vanes
- aerator according
- Prior art date
Links
Classifications
-
- 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
- C02F3/14—Activated sludge processes using surface aeration
- C02F3/16—Activated sludge processes using surface aeration the aerator having a vertical 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
- B01F23/234—Surface aerating
- B01F23/2342—Surface aerating with stirrers near to the liquid surface, e.g. partially immersed, for spraying the liquid in the gas or for sucking gas into the liquid, e.g. using stirrers rotating around a horizontal axis or using centrifugal force
- B01F23/23421—Surface aerating with stirrers near to the liquid surface, e.g. partially immersed, for spraying the liquid in the gas or for sucking gas into the liquid, e.g. using stirrers rotating around a horizontal axis or using centrifugal force the stirrers rotating about a vertical axis
- B01F23/234211—Stirrers thereof
-
- 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
Description
147234147234
Den foreliggende opfindelse angår en aerator omfattende et bæreelement i form af en plan plade, der er indrettet til, når aeratoren er i brug, at ligge i et vandret plan og at kunne bringes til at rotere omkring dens centrale, lodrette akse, et antal vinkelforsatte skovle, der er fastgjort til undersiden af pladen, og som hver strækker sig radialt fra et midterområde af denne i retning mod dens omkreds, idet hver skovl ved en position mellem dens ender har en maksimal dybde under den plane plade og er forsynet med en plade, der er fastgjort til dens nedre kant og strækker sig til begge sider for skovlen langs i hvert fald en del af det parti af dennes længde, der ligger mellem dens ydre ende og positionen for maksimal dybde.The present invention relates to an aerator comprising a support element in the form of a flat plate which is adapted, when the aerator is in use, to lie in a horizontal plane and to be caused to rotate about its central, vertical axis, a number of angular offsets vanes attached to the underside of the plate, each extending radially from a central region thereof towards its circumference, each vane at a position between its ends having a maximum depth below the flat plate and being provided with a plate , which is attached to its lower edge and extends to both sides of the blade along at least a portion of the portion of its length which lies between its outer end and the position of maximum depth.
2 1472342 147234
Aeratorer af denne art kendes bl.a. fra USA patentskrift nr. 3.741.682 og fra de britiske patentskrifter nr. 1.387.924 og nr. 1.402.400. Det har imidlertid vist sig, at sådanne aeratorer, selv om de fungerer tilfredsstillende ved lave omdrejningshastigheder, frembyder problemer med hensyn til driftsmæssig ustabilitet ved større omdrejningshastigheder, hvilket gør en tilfredsstillende styring af deres drift yderst vanskelig.Aerators of this kind are known i.a. from U.S. Patent Nos. 3,741,682 and from British Patents Nos. 1,387,924 and 1,402,400. However, it has been found that such aerators, although operating satisfactorily at low rotational speeds, present problems of operational instability at higher rotational speeds, making satisfactory control of their operation extremely difficult.
Formålet for opfindelsen er derfor at tilvejebringe en aerator af den indledningsvis nævnte art, ved hvilken denne ulempe er elimineret, og som fungerer stabilt også ved store omdrejningshastigheder .The object of the invention is therefore to provide an aerator of the kind mentioned in the introduction, in which this disadvantage is eliminated and which operates stably even at high rotational speeds.
Dette opnås ifølge opfindelsen ved, at det radialt yderste af bærepladen er mindre end det radialt yderste af skovlene, så at den øvre kant af hver skovl strækker sig frit udad forbi bærepladen på en sådan måde, at der ikke er nogen hindring for væskeudledning udad eller opad i det ydre endeområde for hver skovl.This is achieved according to the invention in that the radially outermost part of the support plate is smaller than the radially outermost part of the vanes, so that the upper edge of each vane extends freely outwards past the support plate in such a way that there is no obstacle to liquid discharge outwards or upward in the outer end region of each bucket.
Ved disse foranstaltninger, som går helt imod den lære, der kan uddrages af de foran nævnte patentskrifter, hvor skovlene og bærepladen i alle tilfælde har samme radiale udstrækning med henblik på at opnå en lav sprøjteprofil, har man overraskende ved den frie udledning udad og opad af væsken fra kanalerne mellem skovlene opnået at eliminere den førnævnte ulempe og at opnå en stabil drift at aeratoren også ved store omdrejningshastigheder.With these measures, which are completely contrary to the teachings which can be deduced from the aforementioned patents, where the blades and the support plate in all cases have the same radial extent in order to obtain a low spray profile, one has surprisingly with the free discharge outwards and upwards of the liquid from the channels between the vanes achieved to eliminate the aforementioned disadvantage and to achieve a stable operation of the aerator even at high rotational speeds.
Yderligere konstruktive enkeltheder ved aeratoren ifølge opfindelsen er angivet i de afhængige krav.Further constructive details of the aerator according to the invention are set out in the dependent claims.
Opfindelsen skal i det følgende beskrives nærmere, idet der henvises til tegningen, på hvilken fig. 1 viser aeratoren set fra siden, fig. 2 den i fig. 1 viste aerator set ovenfra, og fig. 3 et tværsnit langs linien III-III i fig. 2.The invention will be described in more detail below, with reference to the drawing, in which fig. 1 shows the aerator seen from the side, fig. 2 the one in fig. 1 seen from above, and fig. 3 is a cross-section along the line III-III in fig. 2.
I fig. 1 til 3 er vist en aerator, som i det væsentlige omfatter et bæreelement 10 i form af en plan, cirkulær skive, der, når aeratoren er i brug, ligger i et vandret plan, og som kan bringes til at rotere ved hjælp af en aksel 11, som er fastgjort centralt til skiven 10, således at den strækker sig i retning opad fra denne. Strækkende sig i retning nedad fra undersiden af skiven 10 ved dennes midte findes et cirkulært nav 12, som er dannet af rør og lukket ved dets nedre ende af en cirkulær plade 13.In FIG. 1 to 3 show an aerator which essentially comprises a support element 10 in the form of a planar, circular disc which, when the aerator is in use, lies in a horizontal plane and which can be caused to rotate by means of a shaft 11, which is fixed centrally to the disc 10, so that it extends in the upward direction therefrom. Extending in the downward direction from the underside of the disc 10 at its center is a circular hub 12 which is formed of tubes and closed at its lower end by a circular plate 13.
3 1472343 147234
Fastgjort til undersiden af bæreelementet 10 findes et antal vinkelforsatte skovle 15, der hver er anbragt i et lodret plan. Som det tydeligst fremgår af fig. 2, strækker hver af skovlene 15 sig radialt og i retning udad fra omkredsen af det cirkulære nav 12 for at afsluttes ved et sted, som ligger uden for omkredskanten af bæreelementet 10. Hver af skovlene 15 er, som det tydeligst fremgår af fig. 3, profileret således, at de har en maksimal dybde under et vandret nulpunkt ved en position mellem skovlens ender, idet skovlens dybde til begge sider for denne position formindskes gradvis. Som det ligeledes bedst fremgår af fig. 3, strækker den Øvre kant af hver skovl 15 sig uafbrudt fra omkredsen af bæreelementet 10 i kontakt med dettes underside til det cirkulære nav 12. Ligeledes strækker den indre kant af hver skovl 15 sig uafbrudt i retning nedad i kontakt med omkredsen af navet 12 over en afstand, som ikke er væsentlig mindre end dybden af navet 12. Den yderste·kant af hver skovl 15 er af væsentlig mindre højde end skovlens indre kant.Attached to the underside of the support element 10 are a number of angled blades 15, each arranged in a vertical plane. As most clearly shown in FIG. 2, each of the vanes 15 extends radially and in an outward direction from the circumference of the circular hub 12 to terminate at a location outside the circumferential edge of the support member 10. Each of the vanes 15 is, as most clearly shown in FIG. 3, profiled so that they have a maximum depth below a horizontal zero point at a position between the ends of the bucket, the depth of the bucket on both sides of this position gradually decreasing. As can also be best seen from FIG. 3, the upper edge of each vane 15 extends continuously from the circumference of the support member 10 in contact with its underside to the circular hub 12. Likewise, the inner edge of each vane 15 extends continuously in a downward direction in contact with the circumference of the hub 12 above a distance which is not substantially less than the depth of the hub 12. The outer edge of each vane 15 is of substantially less height than the inner edge of the vane.
Fastgjort til den nedre kant af hver skovl 15 mellem dennes position for maksimal dybde og skovlens ydre ende findes en plade 16, som strækker sig til begge sider for skovlen vinkelret på denne, som det tydeligt vil fremgå af fig. 1 og 2.Attached to the lower edge of each vane 15 between its position for maximum depth and the outer end of the vane is a plate 16 which extends to both sides of the vane perpendicular thereto, as will be clearly seen from fig. 1 and 2.
Under brugen bringes aeratoren til at rotere i overfladen af en væske, som skal sættes i bevægelse og luftes. Det vil forstås, at der ved centrifugalvirkning slynges væske i retning udad gennem den kanal, som er afgrænset på den i omdrejningsretningen forreste side af hver skovl af bæreelementet 10, skovlen 15 og pladen 16, og at der suges luft ned gennem kanalen ved den i omdrejningsretningen bageste side af hver skovl, dér er afgrænset af de samme dele. Denne luft suges ind i området for maksimal turbulens og sikrer således en god overføring af oxygen til den væske, som luftes.During use, the aerator is caused to rotate in the surface of a liquid which is to be set in motion and vented. It will be appreciated that by centrifugal action, liquid is forced outwardly through the channel defined on the front side of each vane of the support member 10, the vane 15 and the plate 16 in the direction of rotation, and that air is drawn down through the channel at the the direction of rotation rear side of each bucket, which is bounded by the same parts. This air is sucked into the area of maximum turbulence and thus ensures a good transfer of oxygen to the liquid being aerated.
Forsøg med aeratorer af den i det foranstående beskrevne konstruktion har vist, at der er en simpel forbindelse mellem oxygenoverførsel og energiforbrug uanset omdrejningshastighed og nedsænkningsdybde, således at styringen af aeratoren på stedet gøres særlig ligetil.Experiments with aerators of the construction described above have shown that there is a simple connection between oxygen transfer and energy consumption regardless of rotational speed and immersion depth, so that the control of the aerator on site is made particularly straightforward.
Man har ligeledes bemærket, at aeratorer ifølge den foreliggende opfindelse ikke har nogen større tilbøjelighed til at få 4 147234 den luftede væske til at skumme, og at de således har en deraf følgende tendens til at muliggøre, at energiforbruget forbliver konstant under driften.It has also been noted that aerators of the present invention have no greater tendency to cause the aerated liquid to foam, and thus they have a consequent tendency to allow energy consumption to remain constant during operation.
Skovlene 15 behøver dog ikke at strække sig fra omkredsen af et cirkulært nav, men kan alle mødes i maskinens lodrette akse.However, the vanes 15 do not have to extend from the circumference of a circular hub, but can all meet in the vertical axis of the machine.
Ligeledes behøver pladerne 16 f.eks. ikke at strække sig fra de ydre ender af skovlene 15, men kan strække fra positioner indenfor disse ender.Likewise, the plates 16 need e.g. not to extend from the outer ends of the vanes 15, but may extend from positions within these ends.
Ligeledes^kan skiven 10 f.eks. erstattes af en plade med en anden facon end cirkulær.Likewise, the disc 10 can e.g. replaced by a plate with a shape other than circular.
Claims (7)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB92776A GB1502742A (en) | 1976-01-10 | 1976-01-10 | Rotary surface aerators |
| GB92776 | 1976-01-10 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK6077A DK6077A (en) | 1977-07-11 |
| DK147234B true DK147234B (en) | 1984-05-21 |
| DK147234C DK147234C (en) | 1984-10-29 |
Family
ID=9712972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK6077A DK147234C (en) | 1976-01-10 | 1977-01-07 | AERATOR |
Country Status (19)
| Country | Link |
|---|---|
| JP (1) | JPS5285761A (en) |
| AU (1) | AU497934B2 (en) |
| BE (1) | BE849315A (en) |
| BR (1) | BR7700080A (en) |
| CA (1) | CA1057431A (en) |
| CH (1) | CH617103A5 (en) |
| DE (1) | DE2657683C2 (en) |
| DK (1) | DK147234C (en) |
| ES (1) | ES454343A1 (en) |
| FR (1) | FR2337580A1 (en) |
| GB (1) | GB1502742A (en) |
| HK (1) | HK8982A (en) |
| IE (1) | IE44240B1 (en) |
| IN (1) | IN143958B (en) |
| IT (1) | IT1065838B (en) |
| LU (1) | LU76361A1 (en) |
| NL (1) | NL166448C (en) |
| NZ (1) | NZ182762A (en) |
| ZA (1) | ZA767045B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE884216A (en) * | 1980-07-08 | 1980-11-03 | Haegeman Johny H | APPARATUS FOR MIXING GAS WITH LIQUID OR REVERSE AND FOR DEGASSIFICATION OF A LIQUID |
| JP5704928B2 (en) * | 2011-01-11 | 2015-04-22 | 株式会社環境測定サービス | Water circulation device |
| CN110228858A (en) * | 2019-06-14 | 2019-09-13 | 中国石油大学(华东) | A kind of rotary type uniform aeration device |
| CN113716824B (en) * | 2021-11-03 | 2022-01-21 | 苏州飞驰环保科技股份有限公司 | Reinforced sludge aeration treatment device |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE473404C (en) * | 1925-05-24 | 1929-03-16 | Ig Farbenindustrie Ag | Stirring and mixing device |
| FR88774E (en) * | 1962-05-07 | 1967-06-07 | ||
| US3814395A (en) * | 1964-02-27 | 1974-06-04 | Kaelin J R | Aeration plant for clarifying sewage and waste effluents |
| DE1557138B2 (en) * | 1966-02-10 | 1973-08-23 | Metallgesellschaft AG, 6000 Frank fürt | DEVICE FOR GASIFYING LIQUIDS |
| DE1557181C3 (en) * | 1966-11-21 | 1975-03-20 | Passavant - Werke Michelbacher Huette, 6209 Aarbergen | Device for introducing gases into liquids |
| AT281704B (en) * | 1968-11-21 | 1970-05-25 | Passavant Werke | Centrally symmetrical aeration basin with vertical axis surface aerator |
| CH495293A (en) * | 1969-05-19 | 1970-08-31 | Kaelin J R | Vertical axis aerator for aerating liquids |
| DE2140283C3 (en) * | 1971-08-06 | 1979-07-26 | Simon-Hartley Ltd., Stoke-On-Trent, Staffordshire (Grossbritannien) | Vertical-axis aerator agitator for liquids, slurries or the like |
| BE791671A (en) * | 1971-11-23 | 1973-03-16 | Kaelin J R | AERATION CENTRIFUGE OF THE SURFACE OF AN ACTIVE SLUDGE BASIN |
| GB1402400A (en) * | 1973-05-09 | 1975-08-06 | Hartley Simon Ltd | Aerators |
-
1976
- 1976-01-10 GB GB92776A patent/GB1502742A/en not_active Expired
- 1976-11-24 ZA ZA767045A patent/ZA767045B/en unknown
- 1976-11-24 IN IN2100/CAL/76A patent/IN143958B/en unknown
- 1976-11-24 CA CA266,441A patent/CA1057431A/en not_active Expired
- 1976-11-26 AU AU20035/76A patent/AU497934B2/en not_active Expired
- 1976-11-30 NZ NZ18276276A patent/NZ182762A/en unknown
- 1976-12-09 CH CH1548376A patent/CH617103A5/de not_active IP Right Cessation
- 1976-12-10 BE BE173185A patent/BE849315A/en not_active IP Right Cessation
- 1976-12-10 LU LU76361A patent/LU76361A1/xx unknown
- 1976-12-17 ES ES454343A patent/ES454343A1/en not_active Expired
- 1976-12-20 IE IE2791/76A patent/IE44240B1/en not_active IP Right Cessation
- 1976-12-20 DE DE2657683A patent/DE2657683C2/en not_active Expired
- 1976-12-23 FR FR7638857A patent/FR2337580A1/en active Granted
- 1976-12-23 NL NL7614321A patent/NL166448C/en not_active IP Right Cessation
- 1976-12-24 IT IT3087976A patent/IT1065838B/en active
-
1977
- 1977-01-07 DK DK6077A patent/DK147234C/en not_active IP Right Cessation
- 1977-01-07 BR BR7700080A patent/BR7700080A/en unknown
- 1977-01-10 JP JP184477A patent/JPS5285761A/en active Granted
-
1982
- 1982-02-25 HK HK8982A patent/HK8982A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH617103A5 (en) | 1980-05-14 |
| CA1057431A (en) | 1979-06-26 |
| BE849315A (en) | 1977-04-01 |
| NZ182762A (en) | 1978-11-13 |
| GB1502742A (en) | 1978-03-01 |
| DE2657683A1 (en) | 1977-07-14 |
| ES454343A1 (en) | 1978-03-16 |
| JPS5636976B2 (en) | 1981-08-27 |
| AU497934B2 (en) | 1979-01-25 |
| IT1065838B (en) | 1985-03-04 |
| JPS5285761A (en) | 1977-07-16 |
| FR2337580B1 (en) | 1981-07-17 |
| IE44240B1 (en) | 1981-09-23 |
| NL166448C (en) | 1981-08-17 |
| IE44240L (en) | 1977-07-10 |
| DK6077A (en) | 1977-07-11 |
| IN143958B (en) | 1978-03-04 |
| NL7614321A (en) | 1977-07-12 |
| DK147234C (en) | 1984-10-29 |
| LU76361A1 (en) | 1977-06-08 |
| HK8982A (en) | 1982-03-05 |
| AU2003576A (en) | 1978-06-01 |
| BR7700080A (en) | 1977-09-20 |
| DE2657683C2 (en) | 1985-07-11 |
| FR2337580A1 (en) | 1977-08-05 |
| ZA767045B (en) | 1977-10-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PBP | Patent lapsed |