CN102432113B - Aeration agitator - Google Patents
Aeration agitator Download PDFInfo
- Publication number
- CN102432113B CN102432113B CN201110160215.6A CN201110160215A CN102432113B CN 102432113 B CN102432113 B CN 102432113B CN 201110160215 A CN201110160215 A CN 201110160215A CN 102432113 B CN102432113 B CN 102432113B
- Authority
- CN
- China
- Prior art keywords
- air
- tubular shaft
- water
- hollow shaft
- aeration stirrer
- 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.)
- Expired - Fee Related
Links
- 238000005273 aeration Methods 0.000 title claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 59
- 239000011148 porous material Substances 0.000 claims description 17
- 230000000630 rising effect Effects 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000005276 aerator Methods 0.000 abstract description 9
- 238000007654 immersion Methods 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 10
- 239000001301 oxygen Substances 0.000 description 10
- 229910052760 oxygen Inorganic materials 0.000 description 10
- 238000012546 transfer Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 238000003756 stirring Methods 0.000 description 8
- 239000007789 gas Substances 0.000 description 7
- 238000005259 measurement Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000003643 water by type Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Accessories For Mixers (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
The invention provides an aeration agitator, which overcomes the limitations of a conventional spiral type aerator and inhibits the corresponding power incensement amount through increasing the immersion depth and the air amount so as to realize the high energy-conversion-efficiency aerobic operation. A hollow shaft (1) passes through a cover (5) arranged at the outer circumferential portion of the hollow shaft (1). Apart from the lower end portion (5a) of the hollow shaft soaked in the water, an air chamber (50) adopting a sealed structure is formed in the hollow shaft. The overwater portion of the hollow shaft (1) is provided with opening holes (1a,1b), so that the interior of the hollow shaft is communicated with the air chamber (50) through the opening holes (1a,1b). Meanwhile, air is forcedly fed into the air chamber (50) through an air duct (4) from an air supply source (6).
Description
Technical field
The present invention relates to Aeration stirrer, especially can switch simply to the aerobic running (aeration running) of air supply (oxygen) in water with not to the anaerobism running (stirring running) of air supply (oxygen) in water, the Aeration stirrer that particularly can carry out the aerobic running that effciency of energy transfer is high.
Background technology
At present, the aerator using as the sewage farm at lower water etc., is actually used the spiral aerator (referring to Patent Document 1) shown in Fig. 3.
This spiral aerator by electric motor 30, the tubular shaft 1 rotating by electric motor 30, be arranged on tubular shaft 1 upper end motorized valve 40, by blade 20 helicallies be arranged on water screw 2 that the periphery of the bottom of tubular shaft 1 forms, the cover 52 of the tubulose of the periphery that covers tubular shaft 1 and the anti-vortex board 51 that is arranged on the lower end of cover 52 form.
If this spiral aerator makes water screw 2 rotation by drivingmotor 30 via tubular shaft 1, utilize consequent current and produce negative pressure in the front end waters of water screw 2.Due to this negative pressure, if open motorized valve 40, pass through motorized valve 40 air amounts, the air of suction is discharged in water through tubular shaft 1.Now, the air that Xiang Shuizhong discharges by microminiaturization, is carried with depths in current direction water under the blade 20 of water screw 2 and the effect of current, and in this process, airborne oxygen is dissolved in water, carries out aeration (aerobic running).In addition, if close motorized valve 40, air amount not, stirs the sewage (anaerobism running) in aerator tank under the effect of the current that produce in the rotation by water screw 2.
Patent documentation 1: Japanese kokai publication hei 4-277089 communique
Summary of the invention
But current spiral aerator is owing to being the air fed mode of negative pressure oneself that the front end waters by water screw 2 produces, therefore must be by the distance of the vertical direction of 2 front end from the water surface to water screw, be that impregnating depth guarantees as about 0.3m.
Its reason is that (1) is if make impregnating depth excessively shallow, the water screw 2 due to rotation approaches the water surface, thereby can not produce good current, on the contrary, (2) if make impregnating depth excessively dark, and the hydraulic pressure (static pressure) of the front end region of the water screw 2 of rotation rises, thereby the negative pressure effect that the rotation of water screw 2 produces is little, the air capacity of oneself supplying with reduces, and not only can not carry out the aerobic running that effciency of energy transfer is high, and can not in water, send into necessary air capacity.
As mentioned above, in current spiral aerator, above-mentioned impregnating depth must be guaranteed to the left and right for 0.3m, and must make water screw rotation to be applicable to producing the certain speed of current, therefore, although can carry out the adjustment of the such minimizing air capacity of semi-closed motorized valve 40, can not increase the adjustment of air capacity.
And because of the reason of above-mentioned (2), it is very difficult that the residence time that arrives the water surface in order to extend the bubble of emitting from the leading section of water screw 2 increases impregnating depth, improve the efficiency of oxygen translational speed.
In addition, owing to being the structure that can not increase air capacity, so the raising of effciency of energy transfer is limited.
The object of this invention is to provide a kind of Aeration stirrer, it overcomes the restriction of current spiral aerator, by increasing impregnating depth and increasing air capacity, and then suppress corresponding power increasing amount, thereby finally can carry out the aerobic running that effciency of energy transfer is high.
To achieve these goals, Aeration stirrer of the present invention, in the bottom that is rotated the tubular shaft of driving by electric motor, be provided with water screw, it is characterized in that, tubular shaft connects in the cover of the peripheral part that is arranged on tubular shaft, except being immersed in the bottom in water, as closed structure, in inside, form wind box, portion waterborne at tubular shaft forms open pore, the inside of tubular shaft is communicated with via this open pore with wind box, and, when aerobic running, from air supply source via air lead, to wind box, force to send into air.
According to the Aeration stirrer described in technical scheme 1, in this case, fan has been used in air supply source.
In addition, can at the direction of principal axis of tubular shaft, there is compartment of terrain and form a plurality of open pores.
In addition, can rotarily actuate tubular shaft by thering is the electric motor of solid shaft.
In addition, motorized valve can be set on air lead.
According to Aeration stirrer of the present invention, tubular shaft connects in the cover of the peripheral part that is arranged on tubular shaft, except being immersed in the bottom in water, as closed structure, in inside, form wind box, portion waterborne at tubular shaft forms open pore, the inside of tubular shaft is communicated with via this open pore with wind box, and from air supply source via air lead, to wind box, force to send into air when aerobic running, thus, by the negative pressure rotating to form of the air pressure auxiliary propeller forcing to send into wind box, can increase the impregnating depth of water screw, increase air capacity, and, by suppressing corresponding power increasing amount, result can be carried out the aerobic running that effciency of energy transfer is high.
In addition, because fan has been used in air supply source, thereby can form air supply source by simple structure.
In addition, by the direction of principal axis at tubular shaft, there is compartment of terrain and form a plurality of open pores, therefore can prevent that water arrives near motor rising between tubular shaft and cover when carrying out anaerobism running, cause the problem in the dry occlusion of openings hole of the dirt containing in the water because rising.
In addition, by thering is the electric motor of solid shaft, rotarily actuate tubular shaft, thereby can use general motor.
In addition, by motorized valve is set on air lead, thereby can switch simply aerobic running and close motorized valve and the anaerobism running carried out.
Accompanying drawing explanation
Fig. 1 means the explanatory view of an embodiment of Aeration stirrer of the present invention, (a) is vertical view, is (b) front view.
Fig. 2 is near the explanatory view of the current image tubular shaft in anaerobism when running of this Aeration stirrer.
Fig. 3 means the explanatory view of current Aeration stirrer.
Embodiment
Below with regard to the embodiment of Aeration stirrer of the present invention, describe with reference to the accompanying drawings.
Fig. 1 and Fig. 2 represent an embodiment of Aeration stirrer of the present invention.
This Aeration stirrer is the same with the existing Aeration stirrer shown in Fig. 3, is in the bottom of the tubular shaft 1 rotariling actuate by electric motor 3, to be provided with the Aeration stirrer of water screw 2.
And, this Aeration stirrer is configured to: tubular shaft 1 connects in the cover 5 of the peripheral part that is arranged on tubular shaft 1, except being immersed in the bottom 5a in water, as closed structure, in inside, form wind box 50, portion waterborne at tubular shaft 1 forms open pore 1a, 1b, the inside of tubular shaft 1 is communicated with via this open pore 1a, 1b with wind box 50, and, when aerobic running, from air supply source 6 via air lead 4, to wind box 50, force to send into air.
In this case, as send into the air supply source 6 of the means of air to wind box 50 pressures via air lead 4, can use fan.
Therefore can form air supply source by simple structure.
In addition, electric motor 3 uses the motor with solid shaft.
Therefore can use general electric motor, easily keep in repair etc.
In addition, motorized valve 4a is set on air lead 4.
Therefore, can switch simply and open motorized valve 4a, from air supply source 6 via air lead 4, to wind box 50, force to send into air and the aerobic running carried out and close motorized valve 4a and the anaerobism running carried out.
But, close motorized valve 4a and the anaerobism running carried out exists following problem, that is, water rises between tubular shaft 1 and cover 5, arrives near electric motor 3, and the inside of making cover 5 dirty, because being included in the dry and blocked of dirt in the water of rising.
Its mechanism is, in anaerobism running, the negative pressure due to the front end of water screw 2, becomes negative pressure in cover 5, and water rises between tubular shaft 1 and cover 5, and under extreme case, water level rises to the output shaft of electric motor 3 and the connection section of tubular shaft 1.
Now, the negative pressure of the leading section of the tubular shaft 1 of actual measurement is about 2.5mH
2o～4.0mH
2o.
In order to prevent this situation, in this Aeration stirrer, at the direction of principal axis of tubular shaft 1, there is compartment of terrain and form a plurality of open pore 1a, 1b (making open pore 1b be formed on the position that exceeds a little the water surface) here.
Therefore, the water rising in the inside of cover 5 when anaerobism turns round is sucked the private side of tubular shaft 1 from open pore 1b, its result, even if water rises between tubular shaft 1 and cover 5, water also can not rise to the connection section of the open pore 1a of upside or the output shaft of electric motor 3 and tubular shaft 1, especially can prevent that open pore 1a is because being included in the dry and blocked problem of dirt in the water of rising.
Effect with regard to this Aeration stirrer describes below.
First in order to contrast, the impregnating depth that makes to arrange angle and be the front end of 45 degree, water screw 2 is 0.3m, with the power demand of 3.7kW, drive the current Aeration stirrer described in Fig. 3, produce suitable current, and can by own supply, Xiang Shuizhong emits 2.4m
3the air of/min.If using air flow quantity Qa now divided by the value of power demand P the input power η as air
air,
η
air＝Qa/P＝2.4/3.7＝0.65m
3/(min·kW)。
In order to make bubble arrive tank depths, if change the impregnating depth of the front end of water screw 2 into 0.7m from 0.3m, by oneself supplying with the air capacity forming, reduce, be 1.1m
3/ min.
Therefore, except oneself is supplied with, from air supply source 6, be, that fan is sent into air via air lead 4 forcibly to wind box 50.Now, air supply source 6 is that the air pressure that fan forms is 0.4mH
2o.It is dark relatively little that this value is pressed deep water, and the power demand of fan is 0.44kW.
At this, according to following calculation formula, calculate the power demand 0.44kW of fan.
Adiabatic head: H
ad={ κ/(κ-1) } R
gast1{ (P2/P1)
(κ-1)/κ-1}=330 (mm)
κ: specific heat ratio 1.4
R
gas: gas law constant (kgm/kgK) 29.5
T1: temperature in (temperature entirely) K 293.2
P1: entrance total head (kg/m
2abs) 10330
P2: outlet total head (kg/m
2abs) 10330+400 (increasing amount of static pressure)
Air capacity Q=2.4m
3/ min
Weight rate G=1.2 * Q/60=0.054kg/s
Aerodynamic force P=G * Had/102=0.174kW
The mechanical efficiency of fan is decided to be η
b=0.40
Gas blower power demand L=P/ η
b=0.44kW
By the Aeration stirrer to 3.7kW, append the gas blower of 0.44kW, even impregnating depth 300mm is changed into 700mm, also air capacity can be maintained to 2.4m
3/ min.
The air capacity of actual measurement is larger 2.7m
3/ min.The input efficiency eta of air now
airfor,
η
air=Qa/P=2.7/ (3.7+0.44)=0.66m
3/ (minkW), basic identical while being 300mm oneself supply with impregnating depth.
At this, the input efficiency eta of above-mentioned air
airthe target of aeration efficiency, rather than aeration efficiency.At first, aeration efficiency is to be equivalent to the value of power that oxygen in this air is dissolved in the speed of water, and oxygen dissolves dynamic efficiency Ep, is difficult to obtain by simple calculating, with actual measurement, obtains.
As shown in table 1, by actual measurement, confirm that oxygen dissolves dynamic efficiency Ep and rises several percentage points.
Thereby this result thinks by the residence time that extends bubble by strengthening impregnating depth, improved that the phenomenon of aeration efficiency (oxygen dissolves dynamic efficiency Ep) produces.
[table 1]
| Test number | 1 | 2 | 3 |
| Arrange angle [°] | 45 | 45 | 45 |
| Impregnating depth [mm] | 300 | 700 | 700 |
| Fan air pressure [mH 2O] | - | - | 0.4 |
| Axle power P[kW] | 3.18 | 3.27 | 3.38 |
| Gas blower power [kW] | - | - | 0.43 |
| Air permenbility Q[m 3/min] | 2.372 | 1.090 | 2.687 |
| Oxygen dissolves dynamic efficiency Ep | 1.391 | 0.859 | 1.441 |
Just by this Aeration stirrer, can keep below the effect of the effciency of energy transfer of stirring to describe.
First, increase the impregnating depth of the front end of water screw 2, in the situation that bubble is injected to deep-seated putting, be subject to the gas impact that vertically upward mobile trend increases together with liquid, the flow velocity of the water of horizontal flow reduces.Secondly therefore, stirring efficiency likely reduces, but also has the following effect that makes stirring efficiency increase, and by these are cancelled out each other, thereby can maintain the effciency of energy transfer of stirring, and these have obtained confirmation in experiment.
About producing current, stir, if first consider the flow velocity of the water of vertical direction, by increasing impregnating depth, make current produce position to the Distance Shortened of bottom, thereby be suppressed at the current minimizing of bottom.On the other hand, make to produce to horizontal cross the downward side shifting 0.4m in position of current, therefore can obtain in the depth of water of the tank more than 2m for example and cross section, water route that water route width forms, current produce the effect of sliding in Geng Xiang central position, position.
Utilize the depth of water for 2.5m, water route width are for 2.0m, water route length are for annular water route more than 20m, by test, confirm above content, its result, can confirm bottom velocity does not almost have difference, can maintain the effect of the effciency of energy transfer of stirring.
Specifically, with respect in the situation that impregnating depth is 0.3m, mean flow rate is 28.7cm/s, and in the situation that impregnating depth is 0.7m, mean flow rate is 26.3cm/s.
And, according to this Aeration stirrer, as mentioned above, portion waterborne at the tubular shaft 1 of Aeration stirrer forms open pore 1a, 1b, the wind box 50 that its peripheral part surrounds as quilt cover 5, the air that can be produced by the air supply source 6 that is arranged on ground upside to these wind box 50 additional services via air lead 4, the rotating speed according to necessary oxygen meltage control air supply source, can carry out the aerobic running that effciency of energy transfer is high.
In addition, the aperture that the control of air supply amount also can be arranged on air lead 4 motorized valve 4a midway by adjustment is adjusted.In addition, by use aforesaid method simultaneously, the poor efficiency in the time of can suppressing the slow speed of revolution of the air feeder that air feeder often has.
As mentioned above, according to embodiment, with regard to Aeration stirrer of the present invention, be illustrated, but the invention is not restricted to the structure described in above-described embodiment, can suitably combine the structure described in each embodiment etc., in the scope that does not exceed its aim, can suitably change its structure.
Aeration stirrer of the present invention is by increase impregnating depth and increase air capacity, and suppresses its corresponding power increasing amount, finally can carry out the aerobic running that effciency of energy transfer is high, is therefore suitable for the purposes of Aeration stirrer.
Nomenclature
1 tubular shaft
2 water screws
3 electric motor
4 air leads
4a motorized valve
5 covers
50 wind boxs
6 air supply sources
Claims (3)
1. an Aeration stirrer, in the bottom that is rotated the tubular shaft of driving by electric motor, be provided with water screw, it is characterized in that, tubular shaft connects in the cover of the peripheral part that is arranged on tubular shaft, except being immersed in the bottom in water, as closed structure, in inside, form wind box, portion waterborne at tubular shaft has two open pores of compartment of terrain formation at the direction of principal axis of this tubular shaft, the inside of tubular shaft is communicated with via this open pore with wind box, and, when aerobic running, from air supply source via air lead, to wind box, force to send into air, when anaerobism turns round, close the motorized valve that is arranged at air lead, make the water rising in the inside of cover by the open pore from downside, be sucked the private side of tubular shaft.
2. Aeration stirrer according to claim 1, is characterized in that, fan has been used in air supply source.
3. Aeration stirrer according to claim 1 and 2, is characterized in that, by having the electric motor of solid shaft, rotarilys actuate tubular shaft.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010218917A JP5579562B2 (en) | 2010-09-29 | 2010-09-29 | Aeration stirrer |
| JP2010-218917 | 2010-09-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102432113A CN102432113A (en) | 2012-05-02 |
| CN102432113B true CN102432113B (en) | 2014-12-03 |
Family
ID=45980523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110160215.6A Expired - Fee Related CN102432113B (en) | 2010-09-29 | 2011-06-15 | Aeration agitator |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5579562B2 (en) |
| CN (1) | CN102432113B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108404703A (en) * | 2018-03-15 | 2018-08-17 | 安徽国祯环保节能科技股份有限公司 | A kind of centrifugal Aeration stirrer |
| CN115849582B (en) * | 2022-12-13 | 2023-07-07 | 浙江长城搅拌设备股份有限公司 | Stirring aeration device for sewage treatment |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3538715A1 (en) * | 1985-10-31 | 1987-05-07 | Fuchs Leonhard | SCREW VENTILATOR FOR WASTE WATER GAS |
| JPH01293192A (en) * | 1988-05-19 | 1989-11-27 | Hitachi Kiden Kogyo Ltd | Method of operating aeration device |
| CN2036945U (en) * | 1988-08-16 | 1989-05-03 | 中国水产科学研究院渔业工程研究所 | Propeller water-flow oxygen enhancement machine |
| JPH04277089A (en) * | 1991-03-05 | 1992-10-02 | Hitachi Kiden Kogyo Ltd | Aeration stirring device in waste water treatment |
| US5744072A (en) * | 1996-05-03 | 1998-04-28 | Aeration Industries International, Inc. | Method of treating waste water |
| CN2569560Y (en) * | 2001-11-01 | 2003-09-03 | 深圳市中兴环境工程技术有限公司 | Composite stirring aeration oxygenator |
-
2010
- 2010-09-29 JP JP2010218917A patent/JP5579562B2/en active Active
-
2011
- 2011-06-15 CN CN201110160215.6A patent/CN102432113B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN102432113A (en) | 2012-05-02 |
| JP5579562B2 (en) | 2014-08-27 |
| JP2012071269A (en) | 2012-04-12 |
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| ASS | Succession or assignment of patent right |
Owner name: HITACHI,LTD. Free format text: FORMER OWNER: HITACHI PLANT TECHNOLOGIES LTD. Effective date: 20140210 |
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Effective date of registration: 20140210 Address after: Tokyo, Japan Applicant after: Hitachi, Ltd. Address before: Tokyo, Japan Applicant before: Hitachi Plant Technologies, Ltd. |
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| TA01 | Transfer of patent application right | ||
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