CN103253761A - Self-oscillation micropore aerator - Google Patents
Self-oscillation micropore aerator Download PDFInfo
- Publication number
- CN103253761A CN103253761A CN2013101301393A CN201310130139A CN103253761A CN 103253761 A CN103253761 A CN 103253761A CN 2013101301393 A CN2013101301393 A CN 2013101301393A CN 201310130139 A CN201310130139 A CN 201310130139A CN 103253761 A CN103253761 A CN 103253761A
- Authority
- CN
- China
- Prior art keywords
- self
- sustained oscillation
- oscillation
- nozzle
- spray nozzle
- 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.)
- Pending
Links
Images
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)
Abstract
The invention relates to a self-oscillation micropore aerator which comprises a base, a top cover connected to the base, and a rubber diaphragm, wherein the rubber diaphragm is pressed at the upper part of the base through the top cover, the rubber diaphragm is provided with a micropore, and an inner cavity in the lower part of the base is an air supply cavity; and the self-oscillation micropore aerator also comprises a self-oscillation structure, wherein self-oscillation structure comprises an upper nozzle, a self-oscillation cavity and a lower nozzle, the upper nozzle of the self-oscillation structure is communicated with an air supply port which is communicated with an air inlet tube, the lower nozzle of the self-oscillation cavity is communicated with the inlet tube which is communicated with an external air source, and the inner diameter of the upper nozzle of the self-oscillation cavity is more than that of the lower nozzle of the self-oscillation cavity. According to the self-oscillation micropore aerator, the turbulence intensity of an aerating pool can be enhanced, the use ratio of oxygen is increased and the aerating effect is improved.
Description
Technical field
The present invention relates to a kind of aerator, especially a kind of micro-hole aerator.
Background technology
In industrial sewages such as petrochemical industry, printing and dyeing, weaving, papermaking, pharmacy and city domestic sewage biochemical processing process, aerator is owing to providing the required dissolved oxygen of biochemical water treatment extensively to be quoted.
At present common aerator adopts microporous diaphragm aerator, for example application number is 2010101682404 Chinese patent application prospectus, a kind of microporous diaphragm aerator is disclosed, comprise pedestal, be threaded in top cover and rubber diaphragm on the pedestal, wherein top cover is compressed on the top of pedestal with rubber diaphragm, has many enclosed micropores in the rubber diaphragm.During ventilation, pressurized air enters by pipeline in the pedestal of aerator, and under action of air pressure, rubber diaphragm is slightly upwards heaved, and gas never in the air by forming small bubbles, provides dissolved oxygen, to carry out biochemical treatment in treatment tank.In actual applications, owing to aeration under certain pressure, cause the stirring in the sewage aeration pond very low, bubble is directly emerged from the top mostly, causes the utilization ratio of oxygen very low.
Summary of the invention
For the deficiency that agitation capability is weak, coefficient of oxygen utilization is lower, the aeration effect is relatively poor that overcomes existing microporous diaphragm aerator, the invention provides a kind of self-sustained oscillation micro-hole aerator that increases the turbulence intensity of aeration tank, the utilization ratio that improves oxygen, lifting aeration effect.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of self-sustained oscillation micro-hole aerator, comprise pedestal, be connected top cover and rubber diaphragm on the pedestal, wherein top cover is compressed on rubber diaphragm on the top of pedestal, have micropore in the described rubber diaphragm, described pedestal bottom has air feed port, described self-sustained oscillation micro-hole aerator also comprises the self-sustained oscillation structure, described self-sustained oscillation structure comprises upper spray nozzle, the self-excited oscillation cavity and following nozzle, the upper spray nozzle of described self-sustained oscillation structure is communicated with described air feed port, the following nozzle of described self-sustained oscillation structure is communicated with inlet pipe, described inlet pipe is communicated with external source of the gas, and the upper spray nozzle internal diameter of described self-sustained oscillation structure is bigger than the following nozzle inside diameter of described self-sustained oscillation structure.
Further, the top of described the self-excited oscillation cavity is provided with the taper impact walls, and described upper spray nozzle is positioned at the middle part of described taper impact walls.This taper impact walls is conducive to air-flow and forms collar vortex in the self-excited oscillation cavity; Certainly, the cross-sectional shape of impact walls also can be other shapes, and trilateral etc. for example is as long as external diameter is up big and down small.
Further, along described upper spray nozzle from top to bottom, it is big that the external diameter of described taper impact walls becomes gradually.The collar vortex effect of this mode is comparatively desirable, can make only to produce a pair of collar vortex along the axis symmetry in the self-excited oscillation cavity, makes the collar vortex structure more reasonable, and it is stable that air-flow is produced, and periodic exciting has tangible primary band, makes the exciting pulsatile effect best.Certainly, also can adopt other modes.
Further again, the internal diameter of described inlet pipe is along changing from small to big gradually away from described self-sustained oscillation cavity direction.In inlet pipe, air-flow is accelerated, also be conducive to promote turbulent effect.
Described upper spray nozzle and the described medullary ray of nozzle down are located along the same line, and to reduce the aeration process power loss, reduce aeration energy consumption.
Technical conceive of the present invention is: this micro-hole aerator is provided with oscillating structure, reach certain pressure and flow velocity by the pressurized air of pipe-line transportation, when gaseous tension and flow velocity reach certain numerical value, gas is through oscillating structure, and can make and be sent to the mobile of microporous membrane by micro-pore aeration pallet internal space is that time dependent transient state flows.This flow exists the capable ripple of pressure, makes the air-flow that reaches microporous membrane that to a certain degree pulsation be arranged, and then makes bubble velocity that common micro-hole aerator overflows that to a certain degree difference be arranged, and further makes current present the state of strong turbulent flow.When pressurized air when entrance feeds the vibration chamber, momentum exchange takes place between chamber inner fluid and the pressurized air that enters, form certain thickness unstable shear layer, shear layer is carried secretly generation whirlpool, propagates down stream by jet.When the pressurized air with initial vibration when the vortex of continuous generation arrives the downstream impact walls, bring out the pressure disturbance ripple of certain frequency in the impact zone.At a high speed upstream to reflex to chamber entrance, when the frequency of this disturbance wave frequency and jet initial vibration be close, by superposition amplified again by the vibration of whole fluid for this perturbation wave.Repeat said process, the oscillating jet that has namely occurred modulated in the chamber exit.The cylindrical vibration chamber of self-sustained oscillation micro-hole aerator plays a part the simple harmonic device.When the vortex wave frequency of injecting the compressed-air actuated frequency of chamber and chamber structure, geometrical dimension decision is close, air produces resonance, amplitude is exaggerated, and propagate to outlet together, with compressed-air actuated steady state pressure and this two kinds of oscillating pressure superpositions, the mathematical model that can draw self-sustained oscillation micro-hole aerator flowing pressure in chamber is:
p＝p
0+p
Acosk
ax+p
Bcosk
vx(1)
In the formula:
p
0Be steady state pressure; p
A1Be row wave pressure amplitude;
Be vorticity wave pressure amplitude;
The mathematical model of chamber inner fluid velocity of wave motion is:
v＝v
0+v
Asink
ax+v
Bsink
vx （2）
In the formula,
The amplitude of the equal speed of expression row popin;
The amplitude of expression vorticity wave V-bar;
Incoming flow velocity of wave motion during stable state; c
1Inner fluid velocity of wave motion in chamber during stable state; k
sAdiabatic bulk modulus; k
aThe wave number of row ripple; k
vThe wave number of vorticity wave.
Beneficial effect of the present invention mainly shows: increase the turbulence intensity of aeration tank, the utilization ratio that improves oxygen, lifting aeration effect.
Description of drawings
Fig. 1 is the structural representation of self-sustained oscillation micro-hole aerator.
Fig. 2 is the vibration cavity configuration.
Fig. 3 is the mechanism of production synoptic diagram of self-sustained oscillation effect.
Fig. 4 is for flowing out the gas velocity synoptic diagram in vibration chamber.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.
With reference to Fig. 1～Fig. 7, a kind of self-sustained oscillation micro-hole aerator, comprise pedestal 1, be connected top cover 2 and rubber diaphragm 3 on the pedestal, wherein top cover 2 is compressed on rubber diaphragm on the top of pedestal 1, have micropore in the described rubber diaphragm 3, described pedestal 1 bottom has air feed port, described self-sustained oscillation micro-hole aerator also comprises the self-sustained oscillation structure, described self-sustained oscillation structure comprises upper spray nozzle 5, the self-excited oscillation cavity 4 and following nozzle 6, the upper spray nozzle 5 of described self-sustained oscillation structure is communicated with described air feed port, the following nozzle 6 of described self-sustained oscillation structure is communicated with inlet pipe, described inlet pipe is communicated with external source of the gas, and the upper spray nozzle internal diameter of described self-sustained oscillation structure is bigger than the following nozzle inside diameter of described self-sustained oscillation structure.
Further, the top of described the self-excited oscillation cavity 4 is provided with taper impact walls 7, and described upper spray nozzle is positioned at the middle part of described taper impact walls 7.This taper impact walls 7 is conducive to air-flow and forms collar vortex at the self-excited oscillation cavity; Certainly, the cross-sectional shape of impact walls also can be other shapes, and trilateral etc. for example is as long as external diameter is up big and down small.
Further, along described upper spray nozzle from top to bottom, it is big that the external diameter of described taper impact walls 5 becomes gradually.The collar vortex effect of this mode is comparatively desirable, can make only to produce a pair of collar vortex along the axis symmetry in the self-excited oscillation cavity, makes the collar vortex structure more reasonable, and it is stable that air-flow is produced, and periodic exciting has tangible primary band, makes the exciting pulsatile effect best.Certainly, also can adopt other modes.
Further again, the internal diameter of described inlet pipe is along changing from small to big gradually away from described self-sustained oscillation cavity direction.In inlet pipe, air-flow is accelerated, also be conducive to promote turbulent effect.
Described upper spray nozzle and the described medullary ray of nozzle down are located along the same line.To reduce the aeration process power loss, reduce aeration energy consumption.
In the present embodiment, nozzle flows out in the process of upper spray nozzle under the pressurized air warp, velocity variations takes place in gas in the vibration chamber, the gas velocity that flows out upper spray nozzle at last is variant, and then gas degree difference that rubber diaphragm is heaved, the bubble size of overflowing is variant on the one hand, causes bubble to produce gap at the flow velocity of water on the other hand, make the bigger agitaion of water generates, increase the content of dissolved oxygen.
The vibration chamber of present embodiment produces the principle of vibration: when one jet or shear flow when upper spray nozzle flows into the rotational symmetry chamber, vibration has been full of stationary fluid in the chamber, jet produces Turbulent Mixing with stationary fluid on every side.Produce strong momentum exchange, form longshore current to the turbulent shear layer of progressive additive, because jet speed is big, shear layer is burble shear layer and is unsettled; So the fluid around the shear layer is carried and is produced secretly vortex, because shear layer is axisymmetric, so vortex exists with the form symmetry of collar vortex and moves.Be the disengaging zone near the intersection of shear layer and inactive liquid, namely flow and turn to shear layer to distribute from the frictional belt distribution, in shear layer, there is the very big and unsettled zone of velocity slope, orderly macrostructure vortex will be induced, vorticity disturbance in the fluid in the certain frequency scope obtains amplifying, form a succession of discrete collar vortex in shear layer, because shear layer is axisymmetric, therefore the collar vortex that forms also is to be symmetrically distributed along the chamber axle center.When it moves downstream, bump with the downstream impact walls, produce certain pressure disturbance ripple in the impact zone, this pressure disturbance ripple is upstream propagated with wave velocity.Arrive near the initially-separate district of upper spray nozzle.And the disengaging zone is quite responsive to disturbance, can bring out new vorticity pulsation again, because the shear layer unstable has optionally amplification to disturbance, when mixed turbulent carried as side-arm flowed to the vorticity pulsation of propagating in the downstream and satisfies it amplify condition in shear layer, then this disturbance just obtained amplification in shear layer.Disturbance after the amplification bumps with impact walls again, constantly repeats said process again.Thereby cause the laterally pulsation significantly of impact zone shear layer, involve fluid core, cause the fluid impedance periodical change of chamber exit, thereby play the effect of modulation flow, produce self-sustained oscillation.
According to fluid mechanics principle, set the upper spray nozzle diameter, the self-excited oscillation cavity chamber diameter and chamber length, following nozzle diameter, the numerical value at the pitch angle of taper impact walls can produce a pair of collar vortex along the axis symmetry in the self-excited oscillation cavity, make the collar vortex structure more reasonable, it is stable that air-flow is produced, periodic exciting has tangible primary band, makes pulsatile effect best, further make power loss minimum in aeration process, can produce maximum energy output.
The making processes of the self-sustained oscillation micro-hole aerator of present embodiment is about to it and is divided into the processing of three parts shown in Fig. 5,6,7, and first part is according to making shown in Figure 5, and wherein, the self-excited oscillation cavity reaches nozzle segment down, and there are internal thread and outside screw in its upper end; Second section is according to making shown in Figure 6, taper impact walls and upper spray nozzle part, and taper impact walls end has outside screw, with internal thread engagement convenient and the self-excited oscillation cavity upper end, constitutes self-excitation self-sustained oscillation structure; Third part is according to making base construction shown in Figure 7, and there is internal thread the lower end of pedestal, to be convenient to the engagement of the self-excited oscillation cavity upper external screw thread, constitutes base construction; Then first part, second section and third part assembling are formed the self-sustained oscillation micro-hole aerator.
Claims (5)
1. self-sustained oscillation micro-hole aerator, comprise pedestal, be connected top cover and rubber diaphragm on the pedestal, wherein top cover is compressed on rubber diaphragm on the top of pedestal, have micropore in the described rubber diaphragm, described pedestal bottom has air feed port, it is characterized in that: described self-sustained oscillation micro-hole aerator also comprises the self-sustained oscillation structure, described self-sustained oscillation structure comprises upper spray nozzle, the self-excited oscillation cavity and following nozzle, the upper spray nozzle of described self-sustained oscillation structure is communicated with described air feed port, the following nozzle of described self-sustained oscillation structure is communicated with inlet pipe, described inlet pipe is communicated with external source of the gas, and the upper spray nozzle internal diameter of described self-sustained oscillation structure is bigger than the following nozzle inside diameter of described self-sustained oscillation structure.
2. self-sustained oscillation micro-hole aerator as claimed in claim 1, it is characterized in that: described self-sustained oscillation top of chamber is provided with the taper impact walls, and described upper spray nozzle is positioned at the middle part of described taper impact walls.
3. self-sustained oscillation micro-hole aerator as claimed in claim 2, it is characterized in that: along described upper spray nozzle from top to bottom, it is big that the external diameter of described taper impact walls becomes gradually.
4. as the described self-sustained oscillation micro-hole aerator of one of claim 1～3, it is characterized in that: the internal diameter of described inlet pipe is along changing from small to big gradually away from described self-sustained oscillation cavity direction.
5. as the described self-sustained oscillation micro-hole aerator of one of claim 1～3, it is characterized in that: described upper spray nozzle and the described medullary ray of nozzle down are located along the same line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101301393A CN103253761A (en) | 2013-04-15 | 2013-04-15 | Self-oscillation micropore aerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101301393A CN103253761A (en) | 2013-04-15 | 2013-04-15 | Self-oscillation micropore aerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103253761A true CN103253761A (en) | 2013-08-21 |
Family
ID=48958040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013101301393A Pending CN103253761A (en) | 2013-04-15 | 2013-04-15 | Self-oscillation micropore aerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103253761A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111412602A (en) * | 2020-03-31 | 2020-07-14 | 广东美的制冷设备有限公司 | Vortex ring generation method based on air conditioner, storage medium and device |
| CN113636620A (en) * | 2021-07-13 | 2021-11-12 | 江苏大学 | Adjustable self-excited oscillation cavitation degradation device |
| CN115928646A (en) * | 2022-11-04 | 2023-04-07 | 重庆科技学院 | Ring self-oscillation gas lift device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1569691A (en) * | 2004-05-02 | 2005-01-26 | 重庆大学 | Jet Aerating Reactor |
| CN202729897U (en) * | 2012-06-29 | 2013-02-13 | 北京仁创科技集团有限公司 | Aerator |
| CN203269663U (en) * | 2013-04-15 | 2013-11-06 | 浙江工业大学 | Self-oscillation micropore aerator |
-
2013
- 2013-04-15 CN CN2013101301393A patent/CN103253761A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1569691A (en) * | 2004-05-02 | 2005-01-26 | 重庆大学 | Jet Aerating Reactor |
| CN202729897U (en) * | 2012-06-29 | 2013-02-13 | 北京仁创科技集团有限公司 | Aerator |
| CN203269663U (en) * | 2013-04-15 | 2013-11-06 | 浙江工业大学 | Self-oscillation micropore aerator |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111412602A (en) * | 2020-03-31 | 2020-07-14 | 广东美的制冷设备有限公司 | Vortex ring generation method based on air conditioner, storage medium and device |
| CN111412602B (en) * | 2020-03-31 | 2021-11-23 | 广东美的制冷设备有限公司 | Vortex ring generation method based on air conditioner, storage medium and device |
| CN113636620A (en) * | 2021-07-13 | 2021-11-12 | 江苏大学 | Adjustable self-excited oscillation cavitation degradation device |
| CN115928646A (en) * | 2022-11-04 | 2023-04-07 | 重庆科技学院 | Ring self-oscillation gas lift device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107915326B (en) | Microbubble production method and jet stream fine bubble diffuser based on jet stream | |
| CN107744732B (en) | Tubular micro-bubble generator | |
| CN205850620U (en) | Microbubble generator | |
| Rehman et al. | Fluidic oscillator-mediated microbubble generation to provide cost effective mass transfer and mixing efficiency to the wastewater treatment plants | |
| CN111617656B (en) | Micro-bubble generator serving as atomizer and using method thereof | |
| CN204417203U (en) | A kind of efflux aerator | |
| CN103253761A (en) | Self-oscillation micropore aerator | |
| CN201890803U (en) | Jet aerator | |
| CN209193647U (en) | A kind of aeration uses micro bubble generation device | |
| CN203269663U (en) | Self-oscillation micropore aerator | |
| CN201050511Y (en) | Jet pump applied in wet desulfurization forced oxidation | |
| CN208599508U (en) | Micro-nano bubble generator | |
| CN103342420B (en) | A kind of energy-efficient jet aerator | |
| CN103861748B (en) | Recommend external excitation formula fluidic oscillation generator | |
| WO2018148305A1 (en) | Improved venturi apparatus and method of use | |
| JP2007000848A (en) | Method for generating fine bubble | |
| JP2007253000A (en) | Apparatus and process for producing micro bubble | |
| US20180162757A1 (en) | Venturi apparatus and method of use | |
| CN104221989A (en) | High-speed water body oxygenation device | |
| JP2009106918A (en) | Fine bubble generator | |
| CN203440164U (en) | High-efficiency and energy-saving jet aerator | |
| CN208279362U (en) | A kind of venturi equipment of Hydrodynamic Cavitation with groove vortex groove | |
| CN109987726A (en) | A kind of breaking micro-nano bubble method for generation of multistage rotary-cut and device | |
| JP2011183350A (en) | Gas-liquid mixing apparatus | |
| CN208883562U (en) | Jet aerator with strong volume energy-absorbing power |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130821 |