CN2793050Y - Energy-saving microwave water purifier - Google Patents
Energy-saving microwave water purifier Download PDFInfo
- Publication number
- CN2793050Y CN2793050Y CNU2005200571470U CN200520057147U CN2793050Y CN 2793050 Y CN2793050 Y CN 2793050Y CN U2005200571470 U CNU2005200571470 U CN U2005200571470U CN 200520057147 U CN200520057147 U CN 200520057147U CN 2793050 Y CN2793050 Y CN 2793050Y
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- CN
- China
- Prior art keywords
- water
- riser tube
- hydraucone
- conservancy diversion
- sucking mouth
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- 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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- 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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- 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
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/33—Wastewater or sewage treatment systems using renewable energies using wind energy
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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
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
The utility model relates to a microwave energy saving water purifying device, which is suitable for the purification of the water quality of slow flow or closed water bodies of a lake, a reservoir, a fish pond, a pond, etc., and the enhancement oxygen of a deep layer. A lift pipe of the water purifying device which the utility model discloses is provided with at least one flow guiding ring groove water sucking opening, the top end of the lift pipe is provided with a flow guiding horn-shaped water draining opening, and the water sucking opening and the water draining opening are horizontally arranged. Not less than one layer of biological carrier which is flatly and straight extended out of a water area is fixed on the circumference of an outer wall of the lift pipe between the water sucking opening and the water draining opening. The utility model has the advantages of high water quality purification efficiency, profuse enhancement oxygen of the water body deep layer, low investment, low operation cost, energy saving, small water area occupying space and simple management.
Description
Technical field
The utility model relates to a kind of quality purifying device for water that is applicable to unhurried currents such as lake, reservoir, fish pond, pond or closure water body.
Background technology
Unhurried current or closure water bodys such as lake, reservoir, fish pond, pond remain static basically, are " austere backwater ".It is more serious to be mainly reflected in the water quality demixing phenomenon, exist dissolved oxygen gradient, organic pollutant concentration gradient etc. between the levels water body: this is because surface water directly contacts with air, the dissolved oxygen concentration that causes upper water is than higher (heavy-oxygen-enriched water), the dissolved oxygen concentration of lower layer of water lower (anoxic water); Because organic pollutant is deposited on the bottom of water body more, causes the organic concentration of lower layer of water higher, the organic concentration of upper water is lower.Itself exist multiple biology in the natural water body, they play a part natural purification to water body.If be present in the biological know-how's aerobe in the upper water, they are by the aerobic biochemical degradation process, pollutents such as the carbon in the water body, nitrogen, phosphorus, sulphur are separately converted to carbonic acid gas to no toxic biological effect, nitrate, phosphoric acid salt, vitriol etc., make water body as clear as crystal.If be present in the biological know-how anaerobe of lower layer of water, they are by the anaerobic biological degradation process, pollutents such as the carbon in the water body, nitrogen, phosphorus, sulphur are separately converted to methane to the toxic effect of biology, ammonia, phosphuret-(t)ed hydrogen, hydrogen sulfide etc., make water body blackout, smelly.
We wish a large amount of existence aerobes in natural water body, and the aerobic biochemical DeR takes place, and avoid the anaerobic digestion phenomenon.In order to carry out the purification of water quality of closure water body, people have designed the oxygenating machine and the aerator of multiple structure formation, to increase the dissolved oxygen in the water and to eliminate the water quality demixing phenomenon.Existing oxygenation, aerator are various in style, summarize and get up can be divided into two big classes: a class is a water surface machinery aerator, by the rotation of mechanical component (as: changeing brush, rotating disk, impeller, waterwheel etc.), produces the water effect of throwing, air is contacted, to improve the dissolved oxygen concentration in the water with water.The subject matter of this oxygenation way is and can only carries out oxygenation to surface water, and the dissolved oxygen concentration of the lower layer of water of severe depletion of oxygen can not get obvious improvement, contain more organic lower layer of water and can not enter and contain in the less organic upper water, can not eliminate the water quality demixing phenomenon in other words; This class aerator also exists complex structure, defectives such as amplitude is big cost an arm and a leg, dabble.An other class is a blast aeration equipment under water, deliver in the lower layer of water after utilizing gas blower with the air compression, again by micropore gas distribution equipment (as: perforated pipe, aeration first-class), air is blasted in the water with bubble form, perhaps utilize ejector to suck air and be ejected in the lower layer of water, thereby improve the dissolved oxygen concentration of lower layer of water; The air filled cavity that enters lower layer of water rises under buoyancy, can carry a part of lower layer of water secretly in upper water; Therefore, compare with water surface machinery aerator, blast aeration equipment is for dissolved oxygen concentration that improves lower layer of water and elimination concentration gradient under water, and effect can be better, but exist drawbacks such as facility investment is big, running cost is high, floor space is big, noise is big, maintenance is loaded down with trivial details.Can imagine,, perhaps adopt blast aeration method under water carry out purification of water quality if large-size lake, reservoir adopt water surface machinery aeration method, its facility investment and running cost will be big surprising, this is infeasible at all.
Many lakes, the whole nation, reservoir all are used as the water source of tap water or view and admire the water source of water.At present, nitrogen, phosphorus that these closure water bodys all are subjected in various degree pollute, the body eutrophication phenomenon is serious, " clear water " incident of alga eruption takes place often, not only stop up the filter plant of drinking water plant, and can influence the landscape effect of water body, even some blue green algaes secrete the algae toxin, cause a large amount of hydrobiont death; In the domestic premises, no matter roof pond or low pool all belong to the closure water body, tap water is sent into after the pond, water in the pond becomes " stagnant water " because of remaining static basically, thus the time regular meeting in the pond, grow red worm, reduced the quality of tap water; The development of real estate has promoted the construction of artificial water scenery (as: man-made lake etc.), and these water scenery great majority are closure water bodys, tends to occur the water quality greening of man-made lake, smelly problem, has had a strong impact on the appreciation effect of water scenery.Originally, to closure water body aeration aerating, and to eliminate its water quality layering be one of effective measure that address the above problem, but traditional oxygenation, aeration process and equipment are low because of efficient, cost is high, occupation of land is many, complex management, becomes an important factor that limits its application.How both to have improved the oxygenation efficient of aerator and eliminated the water quality layering, and reduced investment cost, running cost, floor space and noise again, be the problem that many production firms and researchist are concerned about always.
Summary of the invention
The purpose of this utility model provides a kind of microwave energy saving water purifier, it is applicable to the purification of water quality of unhurried current such as lake, reservoir, fish pond, pond or closure water body, and the utility model purification of water quality efficient height, the oxygenation of water body deep layer are abundant, reduced investment, running cost are low, energy-conservation, account for that water space is little, management is simple, applied range, be easy to promotion and implementation.
Technical solution of the present utility model is, it is at the vertical riser tube of prior art, the impeller unit that has power system, swim on the basis of supporting device, the utility model particularly riser tube has a water conservancy diversion annular groove water sucking mouth at least, on the riser tube top is the horn-like water port of water conservancy diversion, and water sucking mouth and water port are level towards setting, is fixed with the straight outwardly directed bio-carrier that is no less than one deck on the riser tube outer wall circumference between water sucking mouth and the water port.
More than the water conservancy diversion annular groove water sucking mouth of riser tube described in the utility model bottom be positioned at riser tube bottom nozzle place, or be positioned at the many places that promote pipe shaft.
The water conservancy diversion annular groove water sucking mouth of riser tube described in the utility model bottom is the hydraucone by the riser tube bottom, and with place separated by a distance, this hydraucone below fixed conehead shape water conservancy diversion plectane of adapting of shape with it, formed into flow guiding ring groove between the hydraucone of this riser tube bottom and the water conservancy diversion plectane, the hydraucone edge of this riser tube bottom and water conservancy diversion plectane edge constitute the water sucking mouth jointly.
More than the water conservancy diversion annular groove water sucking mouth of lifting pipe shaft described in the utility model be the hydraucone that promotes pipe shaft, and with place separated by a distance, this hydraucone below fixed close horn-like flow deflector of shape with it, formed into flow guiding ring groove between the hydraucone of this lifting pipe shaft and the horn-like flow deflector, its edge constitutes the water sucking mouth jointly.
More than the horn-like water port of riser tube of the present utility model top water conservancy diversion be by riser tube top hydraucone, and with dome-shaped top of fixed, place separated by a distance, this hydraucone top, this hydraucone edge, riser tube top and dome-shaped top edge constitute water port jointly, or have only the hydraucone of the vertical water conservancy diversion of riser tube.
Bio-carrier layer of the present utility model is rigidity biologic packing material layer, soft biologic packing material layer or the medium-soft biologic packing material layer that sewage disposal is used.
Principle of work of the present utility model briefly, microwave energy saving water purifier designs according to the principle of " Running water never becomes putrid ".Utilize very little energy (can adopt sun power or wind energy) exactly, immobilized closure water body is flowed, and in flow process, realize the purpose of water body oxygenation and purification of water quality.
Specifically, be exactly by power system, by the rotation of rotating shaft impeller, the water body lower layer of water is delivered to water surface through riser tube.Because water port is positioned at the position of the water surface, and is in horizontality,, flatly arrange the peripherad water surface so the lower layer of water that elevates forms " source and course " at the water port place.In the process of impeller rotation, can form one at the water surface and enclose small wave, these waves outwards advance along the water surface " the waves behind drive on those before ", and it is flatly mobile to the bank together to drive upper water.The water sucking mouth arranges that in horizontal direction the guiding lower layer of water flatly flows to the water sucking mouth, and in water sucking mouth formation " confluxing "; According to the current principle of continuity, upper water and lower layer of water direction are carried out horizontal flow on the contrary, will converge on the bank, and upper water flows into downwards in the lower layer of water, to replenish the lower layer of water that is sucked away, have so just formed big " circulation " between upper and lower layer water body.From " confluxing ", " source and course ", to final upper and lower big " circulation " that forms water body, make immobilized " stagnant water ", become mobile " running water ".Like this, the anoxybiotic lower layer of water is thus lifted to after the water surface, constantly carries out Surface Renewal, on the one hand oxygenation rapidly, on the other hand the meta-bolites in the water body (as: carbonic acid gas etc.) is discharged into the atmosphere, also that lower floor is abundant organic matter takes in the upper water; Meanwhile, the upper water circulation of oxygen enrichment has also improved the dissolved oxygen concentration of lower layer of water in lower layer of water.As a result, the dissolved oxygen concentration of whole water body all is improved, and has eliminated the water quality demixing phenomenon effectively, has solved phenomenons such as water body blackout, smelly, alga eruption, makes water body as clear as crystal.
The speed of purification of water quality and efficient, except relevant, also relevant with the aerobe concentration in the water body with the dissolved oxygen concentration of water body.Exist the aerobe of some amount in the natural water body, can be to water body generation self-purification to a certain degree; The dissolved oxygen concentration integral body of water body increases, and therefore the self-purification function of water body also can be strengthened.The speed and the efficient that purify in order further to increase water quality can be provided with the very big bio-carrier of surface-area in water body, allow aerobe high-density growth and breeding on carrier; When water flow through bio-carrier, the organic pollutant in the water absorbed with regard to the aerobe of high-density growth on the suppressed by vector, and it is carried out biochemical degradation.The self-purification of the collaborative water body itself of the cleaning action of aerobe on the bio-carrier, the purpose of purification of water quality is carried out in realization expeditiously.
For the shallow-layer water body, adopt a water sucking mouth, form one deck circulation, just can make the rapid oxygenation of upper and lower water layer, and thoroughly eliminate the water quality demixing phenomenon; For darker water body, then a plurality of water sucking mouths must be set, so that form multilayer circulation, just can reach the ideal effects of purification quality quickly.
The energy consumption of microwave energy saving water purifier run duration, a part are used for lower layer of water risen to and are higher than the certain elevation of the water surface (head), the fricting resistance loss when another part is used to overcome water and flows through device.In order to reach purpose of energy saving, this programme has been taked following particular design:
1, adopts very little lifting lift (generally being no more than 10 millimeters), only produce small water wave.Calculation formula according to the hydraulic hoist energy consumption: W=γ QH/ η ... ... ... ... (1)
In the formula (1), W---energy consumption, kW
The unit weight of γ---water, kN/m
3
Q---flow, m
3/ s
η---promote efficient (relevant) with the device structure form
From formula (1) as can be seen, for a kind of hydraulic hoist equipment, under the same flow Q situation, H is more little for lift, and energy consumption W is more little; We can say that also for a kind of hydraulic hoist equipment, under the same energy consumption W situation, H is more little for lift, flow Q is big more.
2, increase the size of riser tube, water port and water sucking mouth, to reduce flow velocity as far as possible; Keep the internal surface of riser tube, water port and water sucking mouth smooth, and by water conservancy diversion annular groove and water conservancy diversion loudspeaker, realize that streamlined slyness is connected between water sucking mouth and water port and the riser tube, with the resistance coefficient of reducing friction.
Water conservancy diversion annular groove water sucking mouth can flatly suck the water of lower floor, transfers current to vertical direction by horizontal direction, and the resistance of will intaking drops to minimum.
The water that the horn-like water port of water conservancy diversion can elevate from lower floor is flatly arranged the water surface to the periphery, makes current transfer horizontal direction to by vertical direction, and resistance of water drainage is dropped to minimum.
According to current friction resistance calculation formula: h
Friction=ζ v
2/ 2g........................ (2)
In the formula (2), h
Friction---current fricting resistance loss, kW
ζ---coefficient of frictional resistance
V---flow velocity, m/s
G---universal gravity constant, m/s
2
From formula (2) as can be seen, the numerical value of flow velocity v is more little, current fricting resistance loss h
FrictionJust more little; The numerical value of coefficient of frictional resistance ζ is more little, current fricting resistance loss h
FrictionJust more little.
The utility model has reduced current friction resistance in addition to the utmost owing to generally be no more than 10 millimeters minimum lift, so only need reduce energy consumption with very low-power motor running.
The utility model has the advantages that it is applicable to the purification of water quality of unhurried current such as lake, reservoir, fish pond, pond or closure water body, the utility model purification of water quality efficient height, the oxygenation of water body deep layer are abundant, reduced investment, running cost are low, energy-conservation, account for that water space is little, management is simple, applied range, be easy to promotion and implementation.
Description of drawings
Fig. 1 is an organigram of the present utility model;
Fig. 2 is a shallow water type application examples organigram of the present utility model;
Fig. 3 is the organigram of overlooking of the present utility model;
Fig. 4 is the organigram of looking up of the present utility model.
Embodiment
Embodiment one
According to shown in Figure 1, the utility model has a vertical riser tube 3, water conservancy diversion annular groove water sucking mouth is arranged in the bottom of riser tube 3, water conservancy diversion annular groove water sucking mouth is the hydraucone of riser tube bottom, and with place separated by a distance, this hydraucone below fixed conehead shape water conservancy diversion plectane 9 of adapting of shape with it, formed into flow guiding ring groove between the hydraucone of this riser tube bottom and the water conservancy diversion plectane 9, the hydraucone edge of this riser tube bottom and water conservancy diversion plectane edge constitute the water sucking mouth jointly.Two layers of water conservancy diversion annular groove water sucking mouth are arranged on the outer circle wall of riser tube 3 bodies, in the water conservancy diversion annular groove water sucking mouth of riser tube 3 bodies are the hydraucones that promote pipe shaft, and with place separated by a distance, this hydraucone below fixed horn-like flow deflector 8 of adapting of shape with it, formed into flow guiding ring groove between the hydraucone of this lifting pipe shaft and the horn-like flow deflector 8, its edge constitutes the water sucking mouth jointly.The top of riser tube 3 is the horn-like water port of water conservancy diversion, be by riser tube top hydraucone, and with dome-shaped top 1 of fixed, place separated by a distance, this hydraucone top, this hydraucone edge, riser tube top and dome-shaped are pushed up 1 edge and are constituted water port jointly, water sucking mouth of the present utility model and water port are level towards setting, be fixed with motor 6 on the dome-shaped top 1, motor 6 is connected with impeller 4 by rotating shaft 5.Riser tube 3 holds up supporting device 7 being fixed on the hydraucone of riser tube top by three angled five equilibriums of float of swimming by the supporting device 7 of swimming.Be at riser tube 3, be fixed with around riser tube outer wall circumference and be radial straight outwardly directed multi-layer biological carrier 2, the SNP that bio-carrier 2 can adopt Beijing Sang De pro-environment group company to make is used for the suspension type medium-soft biologic packing material of sewage disposal, this biologic packing material is spherical, be convenient to string together with rope fixing, the proportion of its proportion and water is approaching, is suspended in easily in the water, this biologic packing material specific surface area is bigger, is 800m
2/ m
3, help aerobe growth thick and fast in the above.
Embodiment two
See Fig. 2, when the utility model is used in pond, the lake of shallow water, do not establish the water sucking mouth that other is with embodiment one except promoting pipe shaft.
Embodiment three
The utility model also can not be provided with the arch top of top, riser tube 3 tops at some scene, and other together
Embodiment one or two.
Claims (6)
1, microwave energy saving water purifier, it comprises vertical riser tube, the impeller unit that has power system, the supporting device of swimming, it is characterized in that riser tube has a water conservancy diversion annular groove water sucking mouth at least, on the riser tube top is the horn-like water port of water conservancy diversion, and water sucking mouth and water port are level towards setting, is fixed with the straight outwardly directed bio-carrier that is no less than one deck on the riser tube outer wall circumference between water sucking mouth and the water port.
2, microwave energy saving water purifier according to claim 1 is characterized in that the water conservancy diversion annular groove water sucking mouth of riser tube is positioned at riser tube bottom nozzle place, perhaps is positioned at the many places that promote pipe shaft.
3, microwave energy saving water purifier according to claim 1 and 2, the water conservancy diversion annular groove water sucking mouth that it is characterized in that the riser tube bottom is the hydraucone by the riser tube bottom, and with place separated by a distance, this hydraucone below fixed with it the conehead shape water conservancy diversion plectane that adapts of shape constitute jointly, formed into flow guiding ring groove between the hydraucone of this riser tube bottom and the water conservancy diversion plectane, the hydraucone edge of this riser tube bottom and water conservancy diversion plectane edge constitute the water sucking mouth jointly.
4, microwave energy saving water purifier according to claim 1 and 2, the water conservancy diversion annular groove water sucking mouth that it is characterized in that promoting pipe shaft is by the hydraucone that promotes pipe shaft, and with place separated by a distance, this hydraucone below fixed with it the horn-like flow deflector that adapts of shape constitute jointly, formed into flow guiding ring groove between the hydraucone of this lifting pipe shaft and the horn-like flow deflector, its edge constitutes the water sucking mouth jointly.
5, microwave energy saving water purifier according to claim 1, it is characterized in that the horn-like water port of the vertical water conservancy diversion of riser tube is by riser tube top hydraucone, and constitute with dome-shaped top of fixed, place separated by a distance, this hydraucone top is common, this riser tube vertical hydraucone edge and dome-shaped top edge constitute water port jointly, or have only the hydraucone of the vertical water conservancy diversion of riser tube.
6, microwave energy saving water purifier according to claim 1 is characterized in that the bio-carrier layer is rigidity biologic packing material layer, soft biologic packing material layer or the medium-soft biologic packing material layer that sewage disposal is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200571470U CN2793050Y (en) | 2005-04-20 | 2005-04-20 | Energy-saving microwave water purifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200571470U CN2793050Y (en) | 2005-04-20 | 2005-04-20 | Energy-saving microwave water purifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2793050Y true CN2793050Y (en) | 2006-07-05 |
Family
ID=36820198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2005200571470U Expired - Lifetime CN2793050Y (en) | 2005-04-20 | 2005-04-20 | Energy-saving microwave water purifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2793050Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100408484C (en) * | 2005-04-20 | 2008-08-06 | 聂法玉 | Microwave energy saving water purifier |
| CN102092842A (en) * | 2010-12-31 | 2011-06-15 | 济南市供排水监测中心 | In-situ purification method and device of open water body |
| CN105417740A (en) * | 2014-09-17 | 2016-03-23 | 郑伟 | Method and device for stratification aeration in deep-water lake |
| CN105481118A (en) * | 2014-09-16 | 2016-04-13 | 郑伟 | Method and device for oxygenation of lake and reservoir bottom layers |
| CN106386650A (en) * | 2016-09-05 | 2017-02-15 | 吉林大学珠海学院 | Impeller type aerator |
-
2005
- 2005-04-20 CN CNU2005200571470U patent/CN2793050Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100408484C (en) * | 2005-04-20 | 2008-08-06 | 聂法玉 | Microwave energy saving water purifier |
| CN102092842A (en) * | 2010-12-31 | 2011-06-15 | 济南市供排水监测中心 | In-situ purification method and device of open water body |
| CN105481118A (en) * | 2014-09-16 | 2016-04-13 | 郑伟 | Method and device for oxygenation of lake and reservoir bottom layers |
| CN105417740A (en) * | 2014-09-17 | 2016-03-23 | 郑伟 | Method and device for stratification aeration in deep-water lake |
| CN105417740B (en) * | 2014-09-17 | 2018-08-17 | 郑伟 | A kind of device of surface water layering oxygenation |
| CN106386650A (en) * | 2016-09-05 | 2017-02-15 | 吉林大学珠海学院 | Impeller type aerator |
| CN106386650B (en) * | 2016-09-05 | 2019-04-26 | 吉林大学珠海学院 | A kind of paddle aerator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20080806 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |