CN101778665B - Stirring device for activated sludges - Google Patents
Stirring device for activated sludges Download PDFInfo
- Publication number
- CN101778665B CN101778665B CN2008801026232A CN200880102623A CN101778665B CN 101778665 B CN101778665 B CN 101778665B CN 2008801026232 A CN2008801026232 A CN 2008801026232A CN 200880102623 A CN200880102623 A CN 200880102623A CN 101778665 B CN101778665 B CN 101778665B
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- Prior art keywords
- mixing plant
- plant according
- stirring body
- circumferential edges
- drainage system
- Prior art date
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Classifications
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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
- 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
-
- 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
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- 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)
Abstract
The invention relates to a stirring device for activated sludges comprising a hyperboloid stirring body (1) attached to a shaft (2), wherein a plurality of transport ribs (3) are provided on the top (O) of the stirring body (1) running toward the circumferential boundary (UM) thereof, wherein the transport ribs (3) have an oblique course, at least in sections, relative to a radial direction, and wherein the oblique position of the transport ribs (3) is selected such that, when the stirring body (1) rotates in a predetermined rotational direction (R), a flow (S) is generated that is directed outward away from the circumferential boundary (UM) of the stirring body (1). In order to improve the efficiency of the stirring device, the invention proposes that a flow guidance device (7) for guiding the flow (S) generated by the stirring body (1) be provided in a plane running substantially perpendicular to the shaft (2), said flow guidance device surrounding the circumferential boundary (UM) of the stirring body (1) and being relatively fixed thereto.
Description
Technical field
The present invention relates to a kind of mixing plant that is used for activated sludge of preamble according to claim 1.
Background technology
Such equipment is for example known from DE 4218027A1 or DE 19826098C2.In known mixing plant, at axle the planar stirring body of hyperbolic is installed.Be provided with the conveying fin of a plurality of radial skews ground trend at the upside of stirring body.During stirring body rotates, because the planar shape of hyperbolic, and owing to carrying the effect of fin, deflect from flowing of the circumferential edges of stirring body in generation in the liquid medium of stirring body.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of mixing plant with improved mixing effect.
This technical problem solves by the feature of claim 1.Suitable structure is by providing in the claim 2 to 14.
According to the present invention, in the plane of moving towards, be provided with around stirring body circumferential edges and guiding device relatively-stationary with it, to be used for guiding by flowing that stirring body produces basically square with the axisly.Can improve mixing effect in simple and cheap mode with this.
The present invention is based on following understanding, namely stirring efficiency is accompanyed or follow the increase of the radial extension that flows that the circumferential edges of stirring body deflects from and is increased.Observe following situation, namely because flowing of stirring body below forms very important suction, described suction causes the backflow with flow inversion.Backflow makes to flow slows down, and hinders the formation of larger mobile radial extension.
By especially having resisted the components of flow obliquely pointed to basin at the bottom of with the guiding in the plane of square with the axis trend basically of the guiding device of suggestion by flowing that stirring body produces according to the present invention.That has avoided mobile and refluxed interacts.Therefore, the radial extension that flows can significantly improve.
At least in the zone of circumferential edges, carry fin and radial direction suitably forms from-30 ° to-90 °, preferably from the first obliquity angle of-40 ° to-80 °.The negative sign in the value the place ahead at the first obliquity angle represents, these angles with respect to radial direction against the direction of rotation opening.
According to a kind of favourable structure, guiding device has the annular gap around circumferential edges, and described annular gap forms by lower drainage system and the upper drainage system with the axle arranged concentric.Described upper and lower drainage system can be the flat element that the stainless steel of the fiber-reinforced plastic of plastics-particularly or metal-is particularly made.Guiding device suitably forms installation unit.For this purpose, upper and lower drainage system can interconnect by jockey.Jockey can be the wall that basically radially moves towards.Providing of described wall helps improving in the radial direction water conservancy diversion, and thereby further helps the raising of flow range.
According to the suggestion of a kind of alternative structure, jockey is the first inclined wall about radial skew ground trend, described inclined wall and radially form from+30 ° to+90 °, preferably from the second obliquity angle of+40 ° to+80 °.The positive sign in the value the place ahead at the second obliquity angle represents, the second obliquity angle is with respect to radially to the direction of rotation opening.Especially in this wise select the second obliquity angle, so that they point to by flowing that stirring body produces substantially parallelly.Therefore, avoided the deflection of flowing.So, just can further improve mobile radial extension.
According to a kind of other structure, lower drainage system is to be arranged essentially parallel to the annular disk that extend on the plane.The opening that is provided at the annular disk center has been realized passing through in the zone of action of liquid medium at stirring body of refluxing at the bottom of the basin, and has therefore realized its acceleration on radially outside direction.
Can be provided with in this wise on the downside that deviates from drainage system of lower drainage system be used to the supporting member at the bottom of being bearing in basin, so that forming other annular gap at the bottom of the basin and between the lower drainage system.Described other annular gap can form backflow basically in the clear in the stirring body lower zone.
Supporting member can be the other wall that radially moves towards basically.Therefore this type of other wall has little flow resistance for backflow, and helps to form and have flowing of improvement threshold.
According to a kind of alternative structure, supporting member is the second inclined wall about inclined ground trend, and described the second inclined wall and radial direction formation are from-30 ° to-90 °, preferably from-40 ° to-80 ° the 3rd obliquity angle.The negative sign in the value the place ahead at the 3rd obliquity angle represents again, and these angles are with respect to radially against the direction of rotation opening of stirring body.The obliquity of advising of the second inclined wall is chosen as especially so that it is parallel to the backflow direction trend of close bottom.With this, avoided the deflection that refluxes.Therefore, reflux and be subject to as far as possible little resistance, can improve mobile radial extension again with this.
According to a kind of especially favourable structure, the gap width that is arranged essentially parallel to the wall trend of annular gap is widened to the circumferential edges of stirring body.In this case, the annular gap forms nozzle ring, and the flowing of circumferential edges that will deflect from stirring body with this nozzle not only guides in the plane at the bottom of being arranged essentially parallel to basin, and accelerates in this plane.This helps again to improve mobile radial extension significantly.
The conveying fin can be crooked from general radial direction to circumferential edges on the roughly tangential direction of pointing to against direction of rotation.And, carry fin only in the outer radial portion of upside, to extend.In this structure, can produce flowing that the circumferential edges from stirring body with extra high speed deflects from.
According to another structure of the present invention, providing a plurality of shearing fins that basically radially move towards with opposed another downside of upside.The height of shearing fin can increase towards the circumferential edges of stirring body.This type of shearing fin is used for air distribution, and described air can supply in the zone of stirring body below by the air supply passage.Therefore, a wider radial extension is carried the liquid medium that centers on stirring body effectively, and can be mixed with the most tiny bubble for liquid medium.
Description of drawings
Following general be explained embodiments of the invention with reference to the accompanying drawings in more detail.Each figure is:
Fig. 1 illustrates the part viewgraph of cross-section of mixing plant,
Fig. 2 illustrates the complete viewgraph of cross-section according to the mixing plant of Fig. 1,
Fig. 3 illustrates the perspective view of mixing plant, and
Fig. 4 illustrates the top view of other mixing plant.
The specific embodiment
Fig. 1 illustrates the side view of the planar stirring body 1 of the hyperbolic that is fixed on the axle 2.The conveying fin 3 that is positioned at radially outer is provided at the upside O of stirring body 1, and described conveying fin 3 extends until circumferential edges UM.Carry fin 3 at first in trend in the radial direction basically, and then crooked on tangential direction basically against direction of rotation R.Be provided with shearing fin 4 on the downside U near circumferential edges UM, its height increases in the direction of radially outward pointing to.As especially as can be seen from Fig. 2, stirring body 1 is formed by the stirring body wall 5 of hyperboloid shape.Therefore stirring body 1 has funnel-form space 6 at its downside U.
As from Fig. 1 to Fig. 3 as seen, the diversed device 7 of the circumferential edges UM of stirring body 1 surrounds.Described guiding device 7 comprises the diversion member 9 of lower annular disk 8 and ring discoid disposed thereon, and described diversion member 9 maintains distance by the wall 10 of trend radially with annular disk 8.Form annular gap 11 between annular disk 8 and diversion member 9, described annular gap 11 surrounds circumferential edges UM.Diversion member 9 is bent upwards in the direction of pointing to axle 2, so that annular gap 11 is being widened towards the direction of circumferential edges UM.Annular disk 8 is bearing on the bottom B of (not completely shown at this) basin by upper another wall 12 tops of also basically radially arranging with moving towards.The height of described another wall 12 defines another annular gap 13 between bottom B and the annular disk 8.
The function of mixing plant is as follows:
By the rotation of stirring body 1 on direction of rotation R, by carrying the effect of fin 3, produce the mobile S outside circumferential edges UM points to especially.The flowing liquid medium is forced through annular gap 11 such as mud, waste water etc.At this, the medium that flows accelerates owing to the cross section of annular gap 11 narrows.In addition, impel and flow S on the direction of basically moving towards abreast with bottom B.
Because suction appears in formed mobile S below stirring body 1, this suction produces again the backflow RS reverse with mobile S.Also be arranged essentially parallel to the backflow RS that bottom B points to and enter by the lower annular gaps 13 in the guiding device 7, and then the effect by stirring body 1 is deflected, 11 to leave from the annular gap again with mobile S.
Can be space 6 air supplies by the air supply passage of (not shown at this).For this reason, the air supply passage can be arranged essentially parallel to bottom B and extend, and crooked in the direction in 2 times direction spaces 6 of axle.The medium that flows back to according to backflow RS can mix with the air of supplying with by means of shearing fin 4 when leaving by annular gap 11.Then the liquid medium that contains tiny bubble leaves by annular gap 11.
The guiding device 7 that passes through to advise, flow S and backflow RS are directed in mutually stacked parallel plane.Because of with this, reduced mobile S and backflow RS influencing each other between the two.The radial extension of mobile S is improved, and therefore the efficient of mixing plant is improved.
Fig. 4 shows the top view of another mixing plant.As long as the parts of other mixing plant are identical or basic identical with the parts of the mixing plant shown in Fig. 1 to Fig. 3, and then drawing reference numeral is identical as used herein.Represent the first obliquity angle by drawing reference numeral α, this first obliquity angle is formed between the part and radial direction RR of the conveying fin 3 in the circumferential edges UM zone.The first obliquity angle α is approximately-45 ° in-30 ° to-90 ° scope at this.
Other mixing plant and the obliquity that basically is wall 5 and other wall 12 in the difference of the mixing plant shown in Fig. 1 to Fig. 3.The first inclined wall 10a represents with long dotted line in Fig. 4.The first inclined wall 10a is connected diversion member 9 with arranging annular disk 8 thereunder.The first inclined wall 10a and the radial direction RR of level trend form the second obliquity angle β, and described the second obliquity angle β is from+30 ° to+90 °, this be approximately+45 °.The second inclined wall 12a supports annular disk 8 with respect to bottom B.Same horizontally disposed the second inclined wall 12a and radial direction RR forms the 3rd obliquity angle γ, and described the 3rd obliquity angle γ is approximately-45 ° in-30 ° to-90 ° scope at this.
As seen from Figure 4, the first inclined wall 10a roughly vertically moves towards with the second inclined wall 12a.The mobile S that is produced by stirring body 1 roughly moves towards abreast with the first inclined wall 10a.Backflow RS roughly moves towards abreast with the second inclined wall 12a.
As from Fig. 4 in addition as seen, the first inclined wall 10a layout mutually especially with being not parallel to each other.Widening in the radial direction by the annular gap that the first inclined wall 10a forms.Therefore, flowing velocity is reducing in the radial direction because of the annular gap part.For overcoming this shortcoming and realizing the scope of extra high mobile S, can be provided with supplementary wall 10b according to a kind of other structure, supplementary wall 10b is parallel to the first inclined wall 10a trend of arranging on the contrary with direction of rotation R, and has common edge with back to back the first inclined wall 10a near circumferential edges UM.With this constitution realization so that near circumferential edges UM the entering surface of annular gap part roughly corresponding to the face that leaves of annular gap part.Can avoid S the slowing down by annular gap 11 time of flowing with this.
Reference numerals list
1 stirring body
2 axles
3 carry fin
4 shear fin
5 walls
6 spaces
7 guiding devices
8 annular disks
9 diversion members
10 walls
10a the first inclined wall
The 10b supplementary wall
11 annular gaps
12 walls of widening
12a the second inclined wall
13 annular gaps of widening
The O upside
The UM circumferential edges
The U downside
The R direction of rotation
S flows
RS stream
The B bottom
RR radially
α the first obliquity angle
β the second obliquity angle
γ the 3rd obliquity angle
Claims (18)
1. mixing plant that is used for activated sludge, this mixing plant forms the planar stirring body of hyperbolic (1) with being installed on the axle (2),
Wherein, the upside (O) in described stirring body (1) is provided with the conveying fin (3) of a plurality of circumferential edges to stirring body (1) (UM) trend,
Wherein, described conveying fin (3) moves towards with respect to radial skew ground at least in part, and
Wherein, select in this wise the first obliquity of described conveying fin (3), so that during in predetermined direction of rotation (R) rotation, produce mobile (S) that outwards deflect from from the circumferential edges (UM) of described stirring body (1) at described stirring body (1)
It is characterized in that,
In the plane of basically vertically moving towards with described axle (2), be provided with around the circumferential edges (UM) of described stirring body (1) and with the circumferential edges (UM) of described stirring body (1) fixing guiding device (7) relatively, flow (S) that is produced by described stirring body (1) to be used for guiding.
2. mixing plant according to claim 1, wherein, described conveying fin at least in the zone of circumferential edges (UM) with the first obliquity angle (α) of radial direction formation from-30 ° to-90 °.
3. mixing plant according to claim 2, wherein, described the first obliquity angle (α) is between-40 ° to-80 °.
4. mixing plant according to claim 1 and 2, wherein said guiding device (7) has the annular gap (11) around circumferential edges (UM), and described annular gap (11) form by lower drainage system and the upper drainage system of arranging coaxially with described axle (2).
5. mixing plant according to claim 4, wherein said lower drainage system and upper drainage system interconnect by jockey.
6. mixing plant according to claim 5, wherein said jockey is the wall (10) that basically radially moves towards.
7. mixing plant according to claim 5, wherein said jockey is the first inclined wall (10a) about radial skew ground trend, described the first inclined wall (10a) and the second obliquity angle (β) of radial direction formation from+30 ° to+90 °.
8. mixing plant according to claim 7, wherein, described the second obliquity angle (β) is between+40 ° to+80 °.
9. mixing plant according to claim 4, wherein said lower drainage system are to be arranged essentially parallel to the annular disk (8) that extend on the plane.
10. mixing plant according to claim 4, be provided with in this wise be used to the supporting member on the bottom that is bearing in basin (B) on the downside of drainage system (9) on wherein described in deviating from of described lower drainage system, so that between described bottom (B) and described lower drainage system, form other annular gap (13).
11. mixing plant according to claim 10, wherein said supporting member are the other walls (12) that basically radially moves towards.
12. mixing plant according to claim 10, wherein said supporting member is the second inclined wall (12a) with respect to inclined ground trend, described the second inclined wall (12a) and the three obliquity angle (γ) of radial direction formation from-30 ° to-90 °.
13. mixing plant according to claim 12, wherein, described the 3rd obliquity angle (γ) is between-40 ° to-80 °.
14. mixing plant according to claim 4, the gap width that wherein is arranged essentially parallel to the annular gap (11) of described axle (2) trend is widened to the circumferential edges (UM) of stirring body (1).
15. mixing plant according to claim 1, wherein said conveying fin (3) on the roughly tangential direction of pointing to against direction of rotation (R) from roughly radially to circumferential edges (UM) bending.
16. mixing plant according to claim 1, wherein said conveying fin (3) only extends in the radially outer of described upside (O).
17. mixing plant according to claim 1 wherein is being provided with a plurality of shearing fins (4) that basically radially move towards with opposed another downside of described upside (O) (U).
18. mixing plant according to claim 17, the height of wherein said shearing fin (4) increases towards the circumferential edges (UM) of described stirring body (1).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007037585.0 | 2007-08-09 | ||
| DE102007037585 | 2007-08-09 | ||
| PCT/EP2008/005923 WO2009018915A1 (en) | 2007-08-09 | 2008-07-18 | Stirring device for activated sludges |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101778665A CN101778665A (en) | 2010-07-14 |
| CN101778665B true CN101778665B (en) | 2013-01-16 |
Family
ID=39926580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008801026232A Active CN101778665B (en) | 2007-08-09 | 2008-07-18 | Stirring device for activated sludges |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US20100196165A1 (en) |
| EP (1) | EP2175973B1 (en) |
| JP (1) | JP5307812B2 (en) |
| CN (1) | CN101778665B (en) |
| AT (1) | ATE510613T1 (en) |
| BR (1) | BRPI0814951B1 (en) |
| DK (1) | DK2175973T3 (en) |
| EG (1) | EG25611A (en) |
| ES (1) | ES2366873T3 (en) |
| IL (1) | IL203596A (en) |
| PL (1) | PL2175973T3 (en) |
| WO (1) | WO2009018915A1 (en) |
| ZA (1) | ZA201000605B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007037586B3 (en) * | 2007-08-09 | 2008-09-18 | Invent Umwelt- Und Verfahrenstechnik Ag | Stirring device for activated sludge |
| IT1403045B1 (en) * | 2010-04-14 | 2013-09-27 | Formest Srl | SUBMERSIBLE AERATOR |
| DE102013225659A1 (en) * | 2013-12-11 | 2015-06-11 | Invent Umwelt- Und Verfahrenstechnik Ag | Device for circulating a liquid received in a container |
| DE102013225658A1 (en) * | 2013-12-11 | 2015-06-11 | Invent Umwelt- Und Verfahrenstechnik Ag | Agitator and stirrer for generating a flow in a waste water treatment tank |
| DE102013225662A1 (en) * | 2013-12-11 | 2015-06-11 | Invent Umwelt- Und Verfahrenstechnik Ag | Stirring device for circulating wastewater and equipment received in a basin |
| 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 (en) * | 2018-08-06 | 2020-02-06 | Invent Umwelt-Und Verfahrenstechnik Ag | Immersion mixer for circulating drinking water |
| CN109110921A (en) * | 2018-10-09 | 2019-01-01 | 浙江海拓环境技术有限公司 | A kind of waste water denitrification denitrogenation reactor |
| CN110207219B (en) * | 2018-10-18 | 2024-10-01 | 华帝股份有限公司 | Flow guiding device, fan system applying same and range hood |
| DE102019101416B4 (en) * | 2018-12-03 | 2020-07-16 | Invent Umwelt- Und Verfahrenstechnik Ag | Hyperboloid stirring body for circulating liquids as well as stirring and gassing equipment |
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- 2008-07-18 EP EP08784897A patent/EP2175973B1/en not_active Not-in-force
- 2008-07-18 AT AT08784897T patent/ATE510613T1/en active
- 2008-07-18 WO PCT/EP2008/005923 patent/WO2009018915A1/en active Application Filing
- 2008-07-18 BR BRPI0814951A patent/BRPI0814951B1/en not_active IP Right Cessation
- 2008-07-18 CN CN2008801026232A patent/CN101778665B/en active Active
- 2008-07-18 PL PL08784897T patent/PL2175973T3/en unknown
- 2008-07-18 JP JP2010519353A patent/JP5307812B2/en not_active Expired - Fee Related
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2010
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Also Published As
| Publication number | Publication date |
|---|---|
| JP5307812B2 (en) | 2013-10-02 |
| EP2175973B1 (en) | 2011-05-25 |
| EG25611A (en) | 2012-03-20 |
| BRPI0814951B1 (en) | 2018-11-06 |
| BRPI0814951A2 (en) | 2015-01-27 |
| US20100196165A1 (en) | 2010-08-05 |
| JP2010535610A (en) | 2010-11-25 |
| EP2175973A1 (en) | 2010-04-21 |
| IL203596A (en) | 2013-01-31 |
| WO2009018915A1 (en) | 2009-02-12 |
| DK2175973T3 (en) | 2011-08-29 |
| PL2175973T3 (en) | 2011-10-31 |
| CN101778665A (en) | 2010-07-14 |
| ZA201000605B (en) | 2010-09-29 |
| ES2366873T3 (en) | 2011-10-26 |
| ATE510613T1 (en) | 2011-06-15 |
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