CN101058457A - Detachable jet aerator and using method thereof - Google Patents
Detachable jet aerator and using method thereof Download PDFInfo
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- CN101058457A CN101058457A CNA2006100259613A CN200610025961A CN101058457A CN 101058457 A CN101058457 A CN 101058457A CN A2006100259613 A CNA2006100259613 A CN A2006100259613A CN 200610025961 A CN200610025961 A CN 200610025961A CN 101058457 A CN101058457 A CN 101058457A
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- jet aerator
- water
- tail pipe
- jet
- distributor
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- 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
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- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
The invention discloses a split jet aerator, which comprises the following parts: suction inlet, water nozzle, mixing tube, dispersing pipe, tail pipe and distributor, wherein the distributor connects the tail pipe; a cone with the action of deflecting the composite liquid and reducing the local resistance is set in the pipe segment with diffusing angle of tail pipe; the CFD company adopts artificial software value to optimize the design of the structure of jet aerator, which transmits the composite liquid of effluent-living sludge into water nozzle; certain vacuum is formed in the course of jet to form three-phased composite liquid of gas, liquid and solid, which enters into the dispersing pipe to form jet distributor with certain pressure to do inclined ejection to aerate oxygen and stir. The invention improves more dynamic efficiency and more oxygen utility than traditional one, which possesses larger suction quantity, higher bubble quality, evener stirring power and more energy saving.
Description
Technical field
The invention belongs to water treatment field, relate to aerating apparatus.
Background technology
Jet-flow aeration (self-priming) is applied to small-sized waste water and Industrial Wastewater Treatment engineering, compares with micro-hole aerator, has reduced investment, need not to be provided with blower fan and purifying air, stirring effect is good, and the coefficient of oxygen utilization height is difficult for stopping up, advantages such as repair and maintenance is convenient, and noise is little, and is easy for installation.
But the type jet aerator design relative complex, it is little to design the improper inspiratory capacity that causes easily, and bubble quality is poor, and dynamic efficiency is low, influences cost of water treatment, the main bottleneck that this has become the engineering of the type jet aerator to apply.Simultaneously after the type jet aerator basic structure proposes, for the novel jet flow aerator, the research that particularly goes out stream mode and go out stream unit, with the research of jet aerator Design of Structural parameters, do not cause enough attention in recent years, about the research of this respect equipment with use all fewer.The most commonly tail pipe directly discharges, and this to go out the stream mode form simple, but that energy utilizes is unreasonable, and bubble utilizes insufficient, and finally has influence on the aeration cost; Also have to add perforated pipe behind tail pipe, purpose is to wish inhaled air is dissolved in water rapidly, improves the oxygenation capacity of jet-flow aeration, can increase resistance to flow but add perforated pipe, influences the pumping property of ejector, also occurs stopping state simultaneously easily; Also have L type two phase flow pipe and snake type coil pipe, these two kinds belong to the lobster back road, and its benefit is to cause more turbulent fluctuation chance than straight tube, in order to the dissolving and the absorption that increase oxygen, but have increased resistance to flow, reduce air input, therefore are of little use.
This shows, development new texture jet aerator, under the situation of certain energy input, the contradiction of balance pumping property and stirring performance, and adopt advanced method of design to carry out the Design of Structural parameters of each parts, help further excavating and promoting the serviceability of the type jet aerator, reduce the running cost of water treating equipment with this.
Summary of the invention
The object of the present invention is to provide a kind of jet aerator of new texture, higher than traditional jet aerator dynamic efficiency and coefficient of oxygen utilization, inspiratory capacity is bigger, and bubble quality is higher, stirs more even, more energy-conservation.
For realizing above target, technical scheme of the present invention is: a kind of detachable jet aerator, comprise: suction port, water spouting nozzle, mixing tube, diffuser tube, tail pipe, also comprise: water distributor, it is connected with tail pipe, what connected is the pipeline section with diffusion angle, its inner cone that has the deflection mixed solution and reduce the effect of shock resistance that is provided with.
Further, the shape of its discharge outlet is the sub-circular hole; Concrete, can be that the centre is a rectangle, both sides are semicircles.
The shape of described discharge outlet is a rectangle in the middle of being, both sides are semicircles.
A kind of method of optimizing above-mentioned detachable jet aerator adopts the numerical simulation of CFD business software that the structure of described jet aerator is optimized design.
A kind of method of using above-mentioned detachable jet aerator, use water pump that sewage-active sludge intermixture is sent into water spouting nozzle, rely on the contraction of water spouting nozzle inner section to make mixed solution quicken ejection, in the effusive stroke, form certain vacuum, so air is inhaled into by suction opening, air, sewage and active sludge be mutual shear-mixed in mixing tube, form gas, liquid, solid three-phase mixed solution, entering the diffuser tube medium velocity reduces, pressure increases, formation has the jet of certain pressure from the oblique ejection of water distributor, water body is played the effect of oxygenation and stirring.
The present invention has following characteristics:
1. water distributor can the balance pumping property and is stirred the contradiction of performance, impel that the three-phase mixed solution is oblique evenly to go out stream, increased the stirring scope of ejector, and make intake pass to more vast water body, reach with this and rationally to utilize intake and purpose of energy saving, avoided tail pipe, the disadvantage of form of export such as perforated pipe.
2. obliquely go out stream and produce two whirlpools that rotation direction is different in the ejector upper and lower, particularly the bottom water body is stirred preferably, can reduce the aeration dead band, sees Fig. 8,9.
3. the design of the inner circular cone of water distributor not only causes the oblique stream that goes out, and also effectively reduces out the shock resistance of stream discharging, the unlikely pumping property that influences.
4. the discharge outlet in water distributor outlet sub-circular hole helps further to shear bubble, improves bubble quality, finally improves the utilization ratio of oxygen.
5. detachable jet aerator has outstanding structural parameter, and has operating parameters and the rational mounting arrangements design of moving under each full and accurate operating mode thereof.
Adopt the optimization design of this jet aerator of CFD business software numerical simulation carrying out, the advantage of this designing technique is: 1. the design cost cost is low, computation period is short, therefore can calculate parameter as much as possible, filter out more excellent structural parameter and be used for experimental examination, determine the ejector scantlings of the structure, significantly reduce the test work amount.When being traditional design selection parameter, this does not cover.What 2. numerical simulation related to is a notion, is different from the extensive pattern of traditional design, not only can reflect the flow characteristics of real working condition inside, can also obtain the relation between jet process inhalation flow and the parameter, and design considerations is provided.3. can show the jet aerator interior flow field and catch the interior flow field parameter, and experimental test is because the complicacy of runner seems very difficult as theoretical reference.
Description of drawings
Fig. 1 is a kind of embodiment synoptic diagram of detachable jet aerator of the present invention (number in the figure: 1. suction port 2. water spouting nozzles 3. mixing tubes 4. diffuser tubes 5. tail pipes 6. water distributors);
Fig. 2 is a water distributor synoptic diagram embodiment illustrated in fig. 1;
Fig. 3 is an ejector computation model synoptic diagram;
Fig. 4 is an ejector internal speed vector diagram;
Fig. 5 is an ejector internal speed cloud atlas;
Fig. 6 is inside reactor speed vector figure (tail pipe directly discharges);
Fig. 7 is an inside reactor speed cloud atlas (tail pipe directly discharges).
Embodiment
The research of water distributor is an innovative point, and the title of water distributor is that the investigator is referred to as according to its function summary.Its main effect is balance pumping property and the contradiction of stirring performance, impel that the three-phase mixed solution is oblique evenly to go out stream, increased the stirring scope of jet aerator, and made intake pass to more vast water body, reached with this and rationally utilize intake and purpose of energy saving.
Concrete working condition: water distributor 6 is installed at tail pipe 5 rear portions, connects by flange, is convenient to split and maintenance.In the time of work, when the gas-liquid foam stream enters water distributor 6 by tail pipe 5, because the cone 10 of certain angle has been installed in indoor design additional, so flowing of mixed solution will deflect, and with of the discharge outlet discharge of certain speed from water distributor, such angular injection helps energy is reasonably passed to bigger reaction water body, and finally reaches purpose of energy saving.Bubble has obtained secondary shearing at discharge outlet simultaneously, has effectively prevented the also poly-of bubble, has improved the quality and the coefficient of oxygen utilization of bubble.In the reactor of sewage, owing to have excellent stirring effect and bubble quality, therefore can effectively improve the organic loading of sewage disposal, reduce hydraulic detention time, energy-conservation and reduce processing cost, this point is confirmed in the industrial experimentation test at the scene.
The structure of water distributor: the structure of water distributor specifically sees also Fig. 2.Principal character is: adopt flange to be connected with tail pipe 5, the pipeline section that connects is the pipeline section with certain diffusion angle, connect the parts of a shape as mushroom afterwards, the cone 10 of certain angle has been installed in indoor design additional, mainly plays the effect of deflection mixed solution and minimizing shock resistance.The shape of discharge outlet 11 is the sub-circular hole, and is concrete, can be that both sides are semicircles for the centre is a rectangle, and purpose is the secondary shearing bubble.
Explanation to this aerator structural parameter:
Subject matter was that inspiratory capacity is little when jet aerator was used in sewage treatment project at present, and dynamic efficiency is low, causes the processing cost height.But jet-flow aeration treatment process organic loading (volumetric loading) is high, the hydraulic detention time weak point almost is an engineering circle undisputable fact.And wherein cause one of low factor of jet aerator serviceability is exactly that design of Structural Parameters is unreasonable, so another principal feature of the present invention is exactly by theoretical numerical simulation and experimental study, optimized the structural parameter of detachable jet aerator, made that its serviceability is outstanding.This outstanding serviceability has been identified by Tongji University environmental protection product quality supervision and test center and has been confirmed.
Below in conjunction with accompanying drawing and implementing procedure, the present invention is further described.
Do the introduction of embodiment workflow by Fig. 1:
Use water pump that sewage-active sludge intermixture is sent into water spouting nozzle 2, rely on the contraction of water spouting nozzle 2 inner section to make mixed solution quicken ejection, in the effusive stroke, form certain vacuum, so air is inhaled into by suction opening, air, sewage and active sludge be mutual shear-mixed in mixing tube 3 (the domestic trunnion that also claims), form gas, liquid, solid (active sludge) three-phase mixed solution, entering diffuser tube 4 medium velocities reduces, pressure increases, formation has the jet of certain pressure from water distributor 6 oblique ejections, water body is played the effect of oxygenation and stirring.
This invention is through clear water and a large amount of productivity on-the-spot test researchs repeatedly of sewage, and the result shows that the detachable jet device has the following advantages:
1) inspiratory capacity is big, is 1.6kg at spraying pressure, and operating depth is under this operational conditions of 7m, generally can be stabilized in 900～1100l/min.
2) dynamic efficiency reaches 1.98kgO
2/ Kwh, coefficient of oxygen utilization reaches 56.4%.(the serviceability data that provide are provided at Tongji University environmental protection product quality supervision and test center)
3) total oxygen transfer coefficient is big, oxygen dissolved efficiency height, and test shows that dissolved oxygen is more than 11mg/l according to clear water sniff test dissolved oxygen meter.
4) it is good to stir performance, and water distributor can effectively increase the stirring scope, and intake effectively is distributed in in a big way the water body, reduces flow dead, and less power can be realized evenly stirring and mixing, and helps energy saving of system.
5) be difficult for stopping up, easy to maintenance, be convenient to management, suck gas and need not to purify, work noise is little.
Have water-filling ratio, sludge loading and volumetric loading when 6) sewage disposal is used than conventional aeration mode height, speed of response is fast, and hydraulic detention time is short, adaptability to variation water quality is good, characteristics such as treatment effect is stable, and water outlet is effective, and particularly ammonia nitrogen removal and nitrification effect be good.
Table 1 ejector is tested various parameter summary sheets
| Working parameter (unit) | Numerical value |
| Ejector operating depth (m) spraying pressure (kg) the clean water basin water yield (m 3/ h) clean water basin water quality inspiratory capacity (L/min) ejector dynamic efficiency (kgO 2/ Kwh) ejector coefficient of oxygen utilization (%) moves noise dB (A) | 7 1.6 410 fire waters, river and rainwater mixing water 900 ~ 1,100 1.98 56.4 71 |
Additional copy example brief description: according to the concrete structure of this jet aerator, the single-phase computation model of can not pressing of ejector two dimension is seen Fig. 3, contain the significant parameter of being concerned about, selected k-ε turbulence model, uniform incoming flow is adopted in the computational fields import, outlet setting pressure condition, discharge velocity is obtained by the grid iteration.Grid is with the variation of ejector size, and its quantity also changes, and X is to making a call to a grid every 5mm basically, and Z is 40 to grid, adopts steel pipe condition (wall thickness 8mm).Fig. 4, the 5th, one of them The results of example
Additional copy example brief description: Fig. 6～9 are two-dimensional incompressible single phase model (tail pipe is discharging and water distributor discharging directly), compare two kinds by the numerical simulation prediction and go out streamed internal flow characteristics.Select k-ε turbulence model in the example, computational fields is 4m * 1.2m, and the both sides, bottom are 45 ° of inclined-planes, high 0.3m, and base 0.3m, there are a pyrometric cone, base 0.6m, high 0.3m in bottom centre.The tail pipe upper entrance is for calculating the import territory, uniform incoming flow, and the same horizontal component beyond the import is outlet, outlet setting pressure condition, grid is 164 * 40 (X to * Z to), the local refinement of tail pipe inner mesh.Calculation result shows, under the condition of certain energy input, the stirring scope of angular injection is bigger than the direct discharging of tail pipe, energy also can pass to the water body in the reactor more effective and reasonablely, therefore the water distributor discharging has superiority than the direct discharging of tail pipe, has confirmed the result of use of this ejector simultaneously by test in place.
Situ production property testing (60t/h) checking detachable jet aerator clear water result of use obtains outstanding structural parameter.Testing location: Shanghai is with one water pump works, clean water basin scale: 6m * 6m * 12m (length * wide * depth of water).
On-the-spot sewage pilot scale test, the result of use of checking detachable jet aerator sewage disposal (comprising aerobic and the denitrogenation dephosphorizing test), testing location: Sector East, Shanghai purification of water quality factory, pilot reactor scale: 8m * 2.2m (height * diameter), day treatment scale: 20～80m
3/ d fetches water behind this factory's sedimentation basin grid.
Carry out Multifactor Sensibility Analysis, draw the structure of the serviceability that influences this jet aerator and the primary and secondary relation of operating parameter, use the formulation optimizing design scheme for engineering parameter is provided.
The above-mentioned description to embodiment is can understand and apply the invention for ease of those skilled in the art.The person skilled in the art obviously can easily make various modifications to these embodiment, and needn't pass through performing creative labour being applied in the General Principle of this explanation among other embodiment.Therefore, the invention is not restricted to the embodiment here, those skilled in the art should be within protection scope of the present invention for improvement and modification that the present invention makes according to announcement of the present invention.
Claims (5)
1, a kind of detachable jet aerator comprises: suction port, water spouting nozzle, mixing tube, diffuser tube, tail pipe is characterized in that: also comprise: water distributor, and it is connected with tail pipe, and what connected is the pipeline section with diffusion angle, and its inside is provided with cone.
2, detachable jet aerator according to claim 1 is characterized in that: the shape of its discharge outlet is the subcircular hole.
3, detachable jet aerator according to claim 2 is characterized in that: the shape of described discharge outlet is a rectangle in the middle of being, both sides are semicircles.
4, a kind of method of optimizing arbitrary described detachable jet aerator in the claim 1 to 3 is characterized in that: adopt the numerical simulation of CFD business software that the structure of described jet aerator is optimized design.
5, a kind of application rights requires the method for arbitrary described detachable jet aerator in 1 to 3, it is characterized in that: use water pump that sewage-active sludge intermixture is sent into water spouting nozzle, rely on the contraction of water spouting nozzle inner section to make mixed solution quicken ejection, in the effusive stroke, form certain vacuum, so air is inhaled into by suction opening, air, sewage and active sludge be mutual shear-mixed in mixing tube, form gas, liquid, Gu three-phase mixed solution, entering the diffuser tube medium velocity reduces, pressure increases, formation has the jet of certain pressure from the oblique ejection of water distributor, water body is played the effect of oxygenation and stirring.
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| CNB2006100259613A CN100544829C (en) | 2006-04-21 | 2006-04-21 | A kind of detachable jet aerator and using method thereof |
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| CNB2006100259613A CN100544829C (en) | 2006-04-21 | 2006-04-21 | A kind of detachable jet aerator and using method thereof |
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| CN100544829C CN100544829C (en) | 2009-09-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101244868B (en) * | 2008-03-06 | 2010-06-02 | 同济大学 | Optimization design method for jet aeration wastewater treatment reactor |
| CN102641793A (en) * | 2012-04-27 | 2012-08-22 | 苏州市金翔钛设备有限公司 | Novel hydraulic ejector |
| CN102887595A (en) * | 2012-09-21 | 2013-01-23 | 江苏北辰环境科技有限公司 | Drift-type aerating device |
| CN104273084A (en) * | 2014-10-09 | 2015-01-14 | 常州大学 | Oxygenator for pond |
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| CN101244868B (en) * | 2008-03-06 | 2010-06-02 | 同济大学 | Optimization design method for jet aeration wastewater treatment reactor |
| CN102641793A (en) * | 2012-04-27 | 2012-08-22 | 苏州市金翔钛设备有限公司 | Novel hydraulic ejector |
| CN102887595A (en) * | 2012-09-21 | 2013-01-23 | 江苏北辰环境科技有限公司 | Drift-type aerating device |
| CN104273084A (en) * | 2014-10-09 | 2015-01-14 | 常州大学 | Oxygenator for pond |
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| CN108483617B (en) * | 2018-05-30 | 2024-05-24 | 王德喜 | Ozone oxidation device |
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| CN110029350A (en) * | 2019-05-24 | 2019-07-19 | 深圳众意远诚环保科技有限公司 | A kind of bipolar jet stream chlorine gas absorber of acidity etching liquid recycling system |
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| CN111222253A (en) * | 2020-01-20 | 2020-06-02 | 中国科学院生态环境研究中心 | CFD-ASM coupling simulation model, establishment method thereof and sewage treatment system optimization method |
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| CN115611445A (en) * | 2021-06-30 | 2023-01-17 | 无锡金鹏环保科技有限公司 | Harmless treatment system and process for eutrophic aquaculture wastewater |
| CN115611445B (en) * | 2021-06-30 | 2024-06-11 | 无锡金鹏环保科技有限公司 | Harmless treatment system and process for eutrophication aquaculture wastewater |
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