CN101778665A - Stirring device for activated sludges - Google Patents
Stirring device for activated sludges Download PDFInfo
- Publication number
- CN101778665A CN101778665A CN200880102623A CN200880102623A CN101778665A CN 101778665 A CN101778665 A CN 101778665A CN 200880102623 A CN200880102623 A CN 200880102623A CN 200880102623 A CN200880102623 A CN 200880102623A CN 101778665 A CN101778665 A CN 101778665A
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- China
- Prior art keywords
- mixing plant
- stirring body
- aforementioned
- circumferential edges
- drainage system
- 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.)
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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
- 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
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)
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 the preamble according to claim 1.
Background technology
Such equipment is for example known from DE 42 18 027 A1 or DE 198 26 098 C2.In known mixing plant, the planar stirring body of hyperbolic is installed on axle.On the upside of stirring body, be provided with the conveying fin of a plurality of radial skews ground trend.During stirring body rotates, because the planar shape of hyperbolic, and, deflect from flowing of the circumferential edges of stirring body in generation in the liquid medium of stirring body owing to carry the effect of fin.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of mixing plant that has improved mixing effect.
This technical problem solves by the feature of claim 1.Appropriate structures 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, to be used to guide flowing by the stirring body generation with it basically square with the axisly.Can improve mixing effect in simple and cheap mode with this.
The present invention is based on following understanding, promptly 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, promptly 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 bigger mobile radial extension.
By having resisted the components of flow of pointing to obliquely at the bottom of the basin with the guiding in the plane of square with the axis trend basically of the guiding device of suggestion especially by flowing that stirring body produces according to the present invention.That has avoided mobile and refluxed interacts.Therefore, the radial extension of Liu Donging can significantly improve.
At least in the zone of circumferential edges, carry fin and radial direction suitably forms from-30 ° to-90 °, preferably from-40 ° to-80 ° the first obliquity angle.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 following drainage system and the last 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 radially moves towards basically.Providing of described wall helps improving water conservancy diversion in the radial direction, and thereby further helps the raising of flow range.
According to the suggestion of a kind of alternative structure, jockey is first inclined wall about radial skew ground trend, described inclined wall and radially form from+30 ° to+90 °, preferably from+40 ° to+80 ° the second obliquity angle.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, make them point to substantially parallelly by flowing that stirring body produces.Therefore, avoided the deflection of flowing.So, just can further improve mobile radial extension.
According to a kind of other structure, following 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 following drainage system be used to be bearing in basin at the bottom of on supporting member, make in the other annular gap of formation at the bottom of the basin and between the following 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 arrangement is second inclined wall about inclined ground trend, and described 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 once more, and these angles are with respect to radially against the direction of rotation opening of stirring body.The obliquity of being advised of second inclined wall is chosen as especially and makes it be parallel to the backflow direction trend of close bottom.With this, avoided the deflection that refluxes.Therefore, reflux and be subjected to as far as possible little resistance, can improve mobile radial extension again with this.
According to a kind of favourable especially 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 quickens in this plane.This helps to improve mobile radial extension again significantly.
Carry fin can be on the roughly tangential direction of pointing to against direction of rotation from general radial direction to the circumferential edges bending.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 of the present invention another the structure, with opposed another downside of upside on provide a plurality of basically radially the trend the shearing fins.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 feed path.Therefore, the radial extension of a broad is carried the liquid medium around stirring body effectively, and can mix 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 illustrate mixing plant perspective view and
Fig. 4 illustrates the vertical view of other mixing plant.
The specific embodiment
Fig. 1 illustrates the side view that is fixed on the planar stirring body 1 of hyperbolic on the axle 2.The conveying fin 3 that is positioned at radially outer is provided on 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 crooked on tangential direction basically against direction of rotation R then.Be provided with shearing fin 4 on the downside U near circumferential edges UM, its height increases on 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 on 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 following 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 on the direction of pointing to axle 2, makes annular gap 11 widen on the direction of circumferential edges UM.Annular disk 8 is bearing on the bottom B of (not completely shown at this) basin by another wall 12 tops of going up of also radially arranging basically 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, for example mud, waste water etc. are forced through annular gap 11.At this, the medium that flows quickens owing to the cross section of annular gap 11 narrows.In addition, impel and flow S on the direction of moving towards abreast with bottom B basically.
Because suction appears in formed mobile S below stirring body 1, this suction produces and the reverse backflow RS of mobile S again.Also be arranged essentially parallel to the backflow RS that bottom B points to and enter, and the effect by stirring body 1 is deflected then, 11 to leave from the annular gap again with mobile S by the following annular gaps 13 in the guiding device 7.
Can be space 6 air supplies by the air feed path of (not shown) at this.For this reason, the air feed path can be arranged essentially parallel to bottom B and extend, and in the direction bending in 2 times direction spaces 6 of axle.The medium that flows back to according to backflow RS can mix with the air of being supplied with by means of shearing fin 4 when leaving by annular gap 11.The liquid medium that contains tiny bubble leaves by annular gap 11 then.
Pass through the guiding device 7 of being advised, flow S and backflow RS are directed in stacked mutually 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 vertical 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 is wall 5 and other wall 12 in the difference of the mixing plant shown in Fig. 1 to Fig. 3 basically.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 the described 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.The same horizontally disposed 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, 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 the back to back first inclined wall 10a near circumferential edges UM.Construct realization with this, make near the entering surface of circumferential edges UM annular gap part roughly corresponding to the face that leaves of annular gap part.Can avoid S the slowing down the time of flowing with this by annular gap 11.
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 first inclined wall
The 10b supplementary wall
11 annular gaps
12 walls of widening
12a 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 refluxes
The B bottom
RR radially
The α first obliquity angle
The β second obliquity angle
γ the 3rd obliquity angle
Claims (15)
1. mixing plant that is used for activated sludge, this mixing plant have to be installed in and form the planar stirring body of hyperbolic (1) 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 first obliquity of described conveying fin (3) in this wise, make at described stirring body (1) when predetermined direction of rotation (R) goes up rotation, produce flow (S) that outwards deflect from from the circumferential edges (UM) of described stirring body (1),
It is characterized in that,
In the plane of vertically move towards with described axle (2) basically, be provided with around the circumferential edges (UM) of described stirring body (1) and relatively fixing with it guiding device (7), to be used for mobile (S) that guiding is produced by described stirring body (1).
2. mixing plant according to claim 1, wherein, described conveying fin at least in the zone of circumferential edges (UM) with radial direction formation from-30 ° to-90 °, preferably from-40 ° to-80 ° the first obliquity angle (α).
3. mixing plant according to claim 1 and 2, wherein said guiding device (7) has the annular gap (11) around circumferential edges (UM), described annular gap (11) following drainage system and formation of last drainage system by arranging coaxially with described axle (2).
4. according to a described mixing plant of aforementioned claim, wherein said drainage system down and last drainage system interconnect by jockey.
5. according to a described mixing plant of aforementioned claim, wherein said jockey is the wall (10) that radially moves towards basically.
6. according to a described mixing plant of aforementioned claim, wherein said jockey is first inclined wall (10a) about radial skew ground trend, and described first inclined wall (10a) forms from+30 ° to+90 ° with radial direction, preferably from+40 ° to+80 ° the second obliquity angle (β).
7. according to a described mixing plant of aforementioned claim, wherein said drainage system down is to be arranged essentially parallel to the annular disk (8) that extend on the plane.
8. according to a described mixing plant of aforementioned claim, wherein be provided with the supporting member on the bottom (B) that is used to be bearing in basin on described on the downside of drainage system (9) in this wise, make at described bottom (B) and describedly form other annular gap (13) down between the drainage system in deviating from of described down drainage system.
9. according to a described mixing plant of aforementioned claim, wherein said supporting arrangement is the other wall (12) that radially moves towards basically.
10. according to a described mixing plant of aforementioned claim, wherein said supporting arrangement is second inclined wall (10b) with respect to inclined ground trend, and described second inclined wall (10b) forms from-30 ° to-90 ° with radial direction, preferably from-40 ° to-80 ° the 3rd obliquity angle (γ).
11. according to a described mixing plant of aforementioned claim, the gap width that wherein is arranged essentially parallel to the annular gap (11) of described axle (3) trend is widened to the circumferential edges (UM) of stirring body (1).
12. according to a described mixing plant of aforementioned claim, 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.
13. according to a described mixing plant of aforementioned claim, wherein said conveying fin (3) only extends in the radially outer of described upside (O).
14. according to a described mixing plant of aforementioned claim, wherein with opposed another downside of described upside (O) (U) on be provided with a plurality of basically radially the trend shearing fins (4).
15. according to a described mixing plant of aforementioned claim, 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 true CN101778665A (en) | 2010-07-14 |
| CN101778665B 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) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI630026B (en) * | 2013-12-11 | 2018-07-21 | 英凡特環工工程股份公司 | Device for circulating a liquid received in a container |
| TWI689346B (en) * | 2018-08-06 | 2020-04-01 | 德商英凡特環境及方法工程股份公司 | Submersible agitator device for circulating drinking water |
| CN113423490A (en) * | 2018-12-03 | 2021-09-21 | 英文特环境及工艺股份公司 | Hyperboloid-type stirrer for circulating liquid and stirring and gas processing apparatus |
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| 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 |
| 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 |
| 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 |
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|---|---|---|---|---|
| TWI630026B (en) * | 2013-12-11 | 2018-07-21 | 英凡特環工工程股份公司 | Device for circulating a liquid received in a container |
| TWI689346B (en) * | 2018-08-06 | 2020-04-01 | 德商英凡特環境及方法工程股份公司 | Submersible agitator device for circulating drinking water |
| CN112368068A (en) * | 2018-08-06 | 2021-02-12 | 英文特环境及工艺股份公司 | Submersible stirring device for circulating drinking water |
| CN112368068B (en) * | 2018-08-06 | 2023-04-11 | 英文特环境及工艺股份公司 | Submersible stirring device for circulating drinking water |
| CN113423490A (en) * | 2018-12-03 | 2021-09-21 | 英文特环境及工艺股份公司 | Hyperboloid-type stirrer for circulating liquid and stirring and gas processing apparatus |
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 |
| CN101778665B (en) | 2013-01-16 |
| 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 |
| ZA201000605B (en) | 2010-09-29 |
| ES2366873T3 (en) | 2011-10-26 |
| ATE510613T1 (en) | 2011-06-15 |
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