EP2175973B1 - Rührvorrichtung für belebtschlämme - Google Patents
Rührvorrichtung für belebtschlämme Download PDFInfo
- Publication number
- EP2175973B1 EP2175973B1 EP08784897A EP08784897A EP2175973B1 EP 2175973 B1 EP2175973 B1 EP 2175973B1 EP 08784897 A EP08784897 A EP 08784897A EP 08784897 A EP08784897 A EP 08784897A EP 2175973 B1 EP2175973 B1 EP 2175973B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- stirring device
- stirring
- flow
- stirring body
- radial direction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Not-in-force
Links
Images
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/05—Stirrers
- B01F27/11—Stirrers characterised by the configuration of the stirrers
- B01F27/111—Centrifugal stirrers, i.e. stirrers with radial outlets; Stirrers of the turbine type, e.g. with means to guide the flow
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/05—Stirrers
- B01F27/11—Stirrers characterised by the configuration of the stirrers
- B01F27/117—Stirrers provided with conical-shaped elements, e.g. funnel-shaped
Definitions
- the invention relates to a stirring device for activated sludge according to the preamble of patent claim 1.
- Such a device is for example from the DE 42 18 027 A1 or the DE 198 26 098 C2 known.
- a hyperboloid-like stirring body is attached to a shaft.
- a plurality of radially inclined transport ribs are provided.
- a flow directed away from the peripheral edge of the stirring body is generated in a stirring medium surrounding liquid medium.
- Another device of this kind is from the document DE 20207376 U1 known. The invention is based on the object to provide a stirring device with improved stirring efficiency.
- a flow guiding device surrounding the peripheral edge of the stirring body and relatively fixed to guide the flow generated by the stirring body in a plane extending essentially perpendicular to the shaft. This can be improved in a simple and cost-effective manner, the stirring efficiency.
- the invention is based on the finding that the stirring efficiency increases with an increasing radial range of the flow directed away from the peripheral edge of the stirring body. It has been observed that due to the flow below of the stirring body forms a not inconsiderable suction, which causes a reverse flow opposite to the flow. The return flow slows the flow and inhibits the formation of a wide radial range of the same.
- the flow generated by the stirring body is guided in a plane extending essentially perpendicular to the shaft, in particular the formation of flow components directed obliquely to the bottom of the basin is counteracted. A mutual influence of the flow and the return flow is reduced. Thus, the radial range of the flow can be significantly improved.
- the transport ribs expediently form, at least in the region of the peripheral edge with the radial direction, a first skew angle of -30 ° to -90 °, preferably -40 ° to -80 °. With the above negative sign before the amount of the first skew angle, it is indicated that it opens with respect to the radial direction opposite to the rotational direction.
- the flow guiding device has an annular gap surrounding the peripheral edge, which is formed by lower and upper flow guiding means arranged coaxially with the shaft.
- the flow-guiding means may be made of plastic, in particular of fiber-reinforced plastic, or also of metal, preferably of stainless steel, flat elements produced.
- the flow guiding device expediently forms an assembly unit.
- the upper and lower flow guiding means can be connected to each other via connecting means.
- the connecting means may be substantially radially extending walls. The provision of such walls contributes to improved flow guidance in the radial direction and thus further to increase the scope of the flow.
- the connecting means are obliquely extending first inclined walls with respect to the radial direction, which form with the radial direction a second skew angle of + 30 ° to + 90 °, preferably + 40 ° to + 80 °.
- the positive sign used before the amount of the aforementioned second skew angle indicates that the second skew angle opens with respect to the radial direction in the rotational direction.
- the second skew angle is particularly chosen so that it is directed substantially parallel to the flow generated by the stirring body. As a result, a deflection of the flow is avoided. This can further improve the radial range of the flow.
- the lower flow guide is an essentially parallel to the plane extending annular disc.
- a breakthrough provided in the center of the annular disk allows passage of the liquid medium flowing back at the bottom of the tank into the area of action of the stirring body and thus its acceleration in a radially outward-pointing direction.
- support elements for supporting on a bottom of the basin may be provided, such that a further annular gap is formed between the bottom and the lower fluid.
- the further annular gap allows the substantially unimpeded formation of the return flow in a region below the stirring body.
- the support means may essentially be radially extending further walls. Such other walls set the return flow against a low flow resistance and thus contribute to the formation of a flow with an improved range at.
- the proposed skew of the second inclined walls is chosen in particular so that it runs parallel to the direction of a ground-level return flow. This avoids a deflection of the return flow. As a result, the return flow is counteracted with the least possible resistance, which in turn allows the radial range of the flow to be increased.
- a gap width of the annular gap running essentially parallel to the shaft widens toward the peripheral edge of the stirring body.
- the annular gap forms an annular nozzle with which the flow directed away from the peripheral edge of the stirring body is guided not only in a plane substantially parallel to the pelvic floor, but also accelerated in this plane. This again contributes significantly to the improvement of the radial range of the flow.
- the transport ribs can bend towards the peripheral edge from an approximately radial direction in an opposite to the direction of rotation directed approximately tangential direction. Further, they may extend only in an outer radial portion of the upper side. In this embodiment, one of Peripheral edge of the stirring body directed away flow can be generated at a particularly high speed.
- a plurality of substantially radially extending shear ribs are provided on a further underside opposite the upper side.
- a height of the shear ribs may increase towards the peripheral edge of the stirring body.
- Such shear ribs serve to distribute air, which can be supplied via an air supply line in the region below the stirring body.
- the liquid medium surrounding the stirring body can not only be efficiently conveyed with a long reach in a radial direction, but also fine air bubbles can be added.
- Fig. 1 shows a side view of a hyperboloid-like stirring body 1, which is fixed to a shaft 2.
- a radially outer portion transport ribs 3 are provided, which extend to a peripheral edge UM.
- the transport ribs 3 initially run in a substantially radial direction and then bend counter to a direction of rotation R in an in Substantial tangential direction.
- Shear ribs 4 are provided on an underside U in the vicinity of the peripheral edge UM, the height of which increases in a radially outward-pointing direction.
- the stirring body 1 is formed from a hyperboloid-like shaped stirring body wall 5. He therefore has on its underside U a funnel-like recess 6.
- the peripheral edge UM of the stirring body 1 is surrounded by a flow guiding device 7.
- the flow guiding device 7 consists of a lower annular disc 8 and an annular disk-like flow guide element 9 arranged above it, which is held at a distance from the annular disc 8 by means of radially extending walls 10. Between the annular disc 8 and the flow guide 9, an annular gap 11 is formed, which surrounds the peripheral edge UM.
- the flow guiding element 9 is bent upward in a direction pointing toward the shaft 2, so that the annular gap 11 widens in a direction towards the peripheral edge UM.
- the annular disc 8 is supported by further walls 12, which are also arranged substantially radially extending, on a bottom B of a (not completely shown) basin. A height of the further walls 12 defines a further annular gap 13 between the bottom B and the annular disk 8.
- the function of the stirring device is the following:
- a flow S directed away from the peripheral edge UM is generated in particular by the action of the transport ribs 3.
- the flowing liquid medium such as sewage sludge, sewage or the like., Is forced through the annular gap 11. Because of the tapering cross-section of the annular gap 11 while the flowing medium is accelerated. apart of this, the flow S is imposed on a direction which runs substantially parallel to the ground B.
- the return flow RS which is also directed essentially parallel to the bottom B, enters the flow guiding device 7 through the lower annular gap 13 and is then deflected by the action of the stirring body 1 in order to emerge again from the annular gap 11 with the flow S.
- air supply line of the recess 6 air can be supplied.
- the air supply line may extend substantially parallel to the bottom B and bend below the shaft 2 in the direction of the recess 6.
- the medium flowing back according to the return flow RS can be mixed with the supplied air at the exit through the annular gap 11 by means of the shear ribs 4. It then passes through the annular gap 11, a liquid medium containing finest air bubbles.
- the flow S and the return flow RS are guided in superimposed parallel planes. This reduces interactions between the two flows S, RS. A radial range of the flow S and thus the efficiency of the stirring device are improved.
- Fig. 4 shows a plan view of another stirring device.
- the reference character ⁇ denotes a first skew angle, which is formed between a portion of the transport ribs 3 in the region of the peripheral edge UM and a radial direction RR.
- the first skew angle ⁇ is in a range of -30 ° to -90 °, here about at -45 °.
- the further stirring device differs from the one in Fig. 1 to 3 shown stirring device substantially by an inclined position of the walls 5 and the other walls 12.
- First inclined walls 10a are in Fig. 4 indicated by long broken lines. They connect the flow guide 9 with the underneath arranged annular disc 8.
- the horizontally extending first inclined walls 10a form with a radial direction RR a second skew angle ⁇ of + 30 ° to + 90 °, here about + 45 °.
- Second inclined walls 12a support the annular disc 8 with respect to the bottom B from.
- the also horizontally arranged second inclined walls 12a form with the radial direction RR a third skew angle ⁇ in the range of -30 ° to -90 °, here about -45 °.
- the first inclined walls 10a extend approximately perpendicular to the second inclined walls 12a.
- the flow S generated by the stirring body 1 runs approximately parallel to the first inclined walls 10a.
- the return flow RS runs approximately parallel to the second inclined walls 12a.
- auxiliary wall 10b may be provided, which runs parallel to the opposite direction of rotation R arranged first inclined wall 10a and having the next first inclined wall 10a in the vicinity of the peripheral edge UM has a common edge.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Treatment Of Sludge (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL08784897T PL2175973T3 (pl) | 2007-08-09 | 2008-07-18 | Urządzenie do mieszania osadów czynnych |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007037585 | 2007-08-09 | ||
PCT/EP2008/005923 WO2009018915A1 (de) | 2007-08-09 | 2008-07-18 | Rührvorrichtung für belebtschlämme |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2175973A1 EP2175973A1 (de) | 2010-04-21 |
EP2175973B1 true EP2175973B1 (de) | 2011-05-25 |
Family
ID=39926580
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08784897A Not-in-force EP2175973B1 (de) | 2007-08-09 | 2008-07-18 | Rührvorrichtung für belebtschlämme |
Country Status (13)
Country | Link |
---|---|
US (1) | US20100196165A1 (es) |
EP (1) | EP2175973B1 (es) |
JP (1) | JP5307812B2 (es) |
CN (1) | CN101778665B (es) |
AT (1) | ATE510613T1 (es) |
BR (1) | BRPI0814951B1 (es) |
DK (1) | DK2175973T3 (es) |
EG (1) | EG25611A (es) |
ES (1) | ES2366873T3 (es) |
IL (1) | IL203596A (es) |
PL (1) | PL2175973T3 (es) |
WO (1) | WO2009018915A1 (es) |
ZA (1) | ZA201000605B (es) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007037586B3 (de) * | 2007-08-09 | 2008-09-18 | Invent Umwelt- Und Verfahrenstechnik Ag | Rührvorrichtung für Belebtschlämme |
IT1403045B1 (it) * | 2010-04-14 | 2013-09-27 | Formest Srl | Aeratore sommergibile |
DE102013225659A1 (de) * | 2013-12-11 | 2015-06-11 | Invent Umwelt- Und Verfahrenstechnik Ag | Vorrichtung zum Umwälzen einer in einem Behälter aufgenommenen Flüssigkeit |
DE102013225658A1 (de) * | 2013-12-11 | 2015-06-11 | Invent Umwelt- Und Verfahrenstechnik Ag | Rührkörper und Rührvorrichtung zum Erzeugen einer Strömung in einem Abwasserbehandlungsbecken |
DE102013225662A1 (de) * | 2013-12-11 | 2015-06-11 | Invent Umwelt- Und Verfahrenstechnik Ag | Rührkörper zum Umwälzen von in einem Becken aufgenommenem Abwasser und Vorrichtung |
US10173184B2 (en) * | 2015-03-25 | 2019-01-08 | Schlumberger Technology Corporation | Blender for mixing and pumping solids and fluids and method of use thereof |
DE102018119039A1 (de) * | 2018-08-06 | 2020-02-06 | Invent Umwelt-Und Verfahrenstechnik Ag | Tauchrührvorrichtung zum Umwälzen von Trinkwasser |
CN109110921A (zh) * | 2018-10-09 | 2019-01-01 | 浙江海拓环境技术有限公司 | 一种废水反硝化脱氮反应器 |
CN110207219A (zh) * | 2018-10-18 | 2019-09-06 | 华帝股份有限公司 | 导流装置、应用其的风机系统以及吸油烟机 |
DE102019101416B4 (de) | 2018-12-03 | 2020-07-16 | Invent Umwelt- Und Verfahrenstechnik Ag | Hyperboloid-Rührkörper zum Umwälzen von Flüssigkeiten sowie Rühr- und Begasungseinrichtung |
Family Cites Families (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE559622A (es) * | ||||
US1353165A (en) * | 1919-02-21 | 1920-09-21 | Johnson John | Mixer |
US2434682A (en) * | 1944-08-18 | 1948-01-20 | Charles T Zahn | Device for production of underwater sound fields |
US2450802A (en) * | 1944-11-15 | 1948-10-05 | John E Johnson | Mixer |
USRE27380E (en) * | 1969-06-12 | 1972-05-30 | Flotation machine and stator therefor | |
US3820759A (en) * | 1972-06-05 | 1974-06-28 | Hege Avanced Syst Corp | Centrifugal mixing apparatus and method |
US3917763A (en) * | 1972-09-05 | 1975-11-04 | Werner Frank D | Aerator |
CA1048493A (en) * | 1973-11-26 | 1979-02-13 | Joseph Mizrahi | Centrifugal impeller type liquid-liquid mixer with means for forced recirculation |
US3882016A (en) * | 1974-01-02 | 1975-05-06 | Charles A Green | Flotation machine and impeller therefor |
JPS5823036Y2 (ja) * | 1975-09-16 | 1983-05-17 | カブシキガイシヤ ツルミセイサクシヨ | スイチユウビサイキホウポンプ |
JPS55142535A (en) * | 1979-04-20 | 1980-11-07 | Kurimoto Iron Works Ltd | Oxygen supplier for water |
US4551285A (en) * | 1984-02-09 | 1985-11-05 | Envirotech Corporation | Flotation machine and aeration impeller |
DE3603466A1 (de) * | 1985-05-31 | 1987-08-06 | Franz Dr Ing Nestmann | Vorrichtung zum begasen und umwaelzen von fluessigkeiten in becken |
DE4218027A1 (de) * | 1991-05-30 | 1992-12-03 | Marcus Dipl Ing Hoefken | Hyperboloid-ruehr- und begasungssystem zum ruehren, mischen und begasen in ein- oder mehrphasigen fluiden |
FI91242C (fi) * | 1992-07-17 | 1994-06-10 | Outokumpu Mintec Oy | Ilmastuslaite |
DE9316251U1 (de) * | 1993-10-25 | 1994-02-10 | Charatjan Manuela | Vorrichtung zum Rühren, bzw. zum Rühren und gleichzeitigen Begasen von Flüssigkeiten, Suspensionen und heterogenen Fluiden |
US6000840A (en) * | 1997-12-17 | 1999-12-14 | Charles Ross & Son Company | Rotors and stators for mixers and emulsifiers |
US6659744B1 (en) * | 2001-04-17 | 2003-12-09 | Charles Dow Raymond, Jr. | Rotary two axis expansible chamber pump with pivotal link |
DE10221824C1 (de) * | 2002-05-10 | 2003-09-11 | Schulz Verfahrenstechnik Gmbh | Hydrodynamischer Impulsbeschleuniger |
DE20207376U1 (de) * | 2002-05-10 | 2003-06-26 | Invent Umwelt & Verfahrenstech | Rühr- und Begasungsvorrichtung für Belebtschlämme |
JP4104965B2 (ja) * | 2002-12-09 | 2008-06-18 | 株式会社鶴見製作所 | 水中曝気装置 |
JP2004188259A (ja) * | 2002-12-09 | 2004-07-08 | Tsurumi Mfg Co Ltd | 水中曝気装置 |
US20050191174A1 (en) * | 2004-02-27 | 2005-09-01 | Ling-Zhong Zeng | Centrifugal fan |
JP4291232B2 (ja) * | 2004-08-10 | 2009-07-08 | 株式会社神鋼環境ソリューション | 曝気処理方法 |
JP2006061780A (ja) * | 2004-08-25 | 2006-03-09 | Kobelco Eco-Solutions Co Ltd | 曝気槽と、その曝気槽における消泡方法 |
JP2006255514A (ja) * | 2005-03-15 | 2006-09-28 | Kobelco Eco-Solutions Co Ltd | 有機性排水処理装置および有機性排水処理方法 |
DE102005016948B3 (de) * | 2005-04-12 | 2007-01-04 | Invent Umwelt-Und Verfahrenstechnik Ag | Rührvorrichtung und Verfahren zur Abwasserbehandlung |
JP2007090218A (ja) * | 2005-09-28 | 2007-04-12 | Kobelco Eco-Solutions Co Ltd | 有機性排水処理方法ならびに有機性排水処理設備 |
USD665047S1 (en) * | 2010-02-11 | 2012-08-07 | Invent Umwelt-Und Verfahrenstechnik Ag | Stirring body |
-
2008
- 2008-07-18 JP JP2010519353A patent/JP5307812B2/ja not_active Expired - Fee Related
- 2008-07-18 US US12/452,964 patent/US20100196165A1/en not_active Abandoned
- 2008-07-18 EP EP08784897A patent/EP2175973B1/de not_active Not-in-force
- 2008-07-18 ES ES08784897T patent/ES2366873T3/es active Active
- 2008-07-18 DK DK08784897.4T patent/DK2175973T3/da active
- 2008-07-18 AT AT08784897T patent/ATE510613T1/de active
- 2008-07-18 WO PCT/EP2008/005923 patent/WO2009018915A1/de active Application Filing
- 2008-07-18 BR BRPI0814951A patent/BRPI0814951B1/pt not_active IP Right Cessation
- 2008-07-18 CN CN2008801026232A patent/CN101778665B/zh active Active
- 2008-07-18 PL PL08784897T patent/PL2175973T3/pl unknown
-
2010
- 2010-01-27 ZA ZA201000605A patent/ZA201000605B/xx unknown
- 2010-01-28 IL IL203596A patent/IL203596A/en active IP Right Grant
- 2010-02-08 EG EG2010020204A patent/EG25611A/xx active
Also Published As
Publication number | Publication date |
---|---|
CN101778665B (zh) | 2013-01-16 |
JP5307812B2 (ja) | 2013-10-02 |
ZA201000605B (en) | 2010-09-29 |
WO2009018915A1 (de) | 2009-02-12 |
ES2366873T3 (es) | 2011-10-26 |
BRPI0814951B1 (pt) | 2018-11-06 |
US20100196165A1 (en) | 2010-08-05 |
EP2175973A1 (de) | 2010-04-21 |
IL203596A (en) | 2013-01-31 |
BRPI0814951A2 (pt) | 2015-01-27 |
EG25611A (en) | 2012-03-20 |
CN101778665A (zh) | 2010-07-14 |
ATE510613T1 (de) | 2011-06-15 |
PL2175973T3 (pl) | 2011-10-31 |
JP2010535610A (ja) | 2010-11-25 |
DK2175973T3 (da) | 2011-08-29 |
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