CN108298626A - A kind of aerating wastewater purifier - Google Patents
A kind of aerating wastewater purifier Download PDFInfo
- Publication number
- CN108298626A CN108298626A CN201810036858.1A CN201810036858A CN108298626A CN 108298626 A CN108298626 A CN 108298626A CN 201810036858 A CN201810036858 A CN 201810036858A CN 108298626 A CN108298626 A CN 108298626A
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- China
- Prior art keywords
- resistance
- triode
- capacitance
- controller
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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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Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/40—Mixers using gas or liquid agitation, e.g. with air supply tubes
- B01F33/405—Mixers using gas or liquid agitation, e.g. with air supply tubes in receptacles having guiding conduits therein, e.g. for feeding the gas to the bottom of the receptacle
- B01F33/4051—Mixers using gas or liquid agitation, e.g. with air supply tubes in receptacles having guiding conduits therein, e.g. for feeding the gas to the bottom of the receptacle with vertical conduits through which the material is being moved upwardly driven by the fluid
- B01F33/40512—Mixers using gas or liquid agitation, e.g. with air supply tubes in receptacles having guiding conduits therein, e.g. for feeding the gas to the bottom of the receptacle with vertical conduits through which the material is being moved upwardly driven by the fluid involving gas diffusers at the bottom
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
- B01F2101/305—Treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention discloses a kind of aerating wastewater purifiers, including controller, equipment power supply, gas collecting apparatus and air floatation machine ontology, it is provided with controller on the left of air floatation machine ontology, the upper end of controller is equipped with equipment power supply, controller lower end is provided with gas collecting apparatus, air floatation machine ontology left upper end is provided with flocculant adding apparatus and wastewater inlet, coagulant adding set connects wastewater inlet, gas collecting apparatus connects gas-guide tube, jet thrust is provided on gas-guide tube, the present invention designs advantages of simple in structure, it uses easy to operate, practicability is very high, each electricity consumption part is driven to work using the power supply power supply of high stability, and it is provided with controller, without human intervention, save human resources, realize efficient separation；The fusion of sewage and gas is more abundant, and the solid separation in sewage is more thorough.
Description
Technical field
The present invention relates to a kind of purifier, specifically a kind of aerating wastewater purifier.
Background technology
It is known that water resource is the human survival natural resources most valuable with development, however as economic development and population
Increase, the expansion of urban size brings being on the increase for urban water consumption and sanitary wastewater amount, to make city water resource
Imbalance between supply and demand become increasingly conspicuous, water become urban development maximum restraining factors.Obtain today very valuable in water resource, sewage
Processing and reuse are extremely important.It investigates and is obtained in current various sewage disposal schemes both domestic and external according to me, flocculant, coagulation
The use of agent is a kind of wherein essential ancillary measure, is used to dissolve and add the equipment of this substance at sewage in this way
Application in science and engineering journey is all very universal at home and abroad.Existing waste water purification device mostly uses the modes such as mixing precipitation
It works, working effect is single, and clean-up effect is poor.
Invention content
The purpose of the present invention is to provide a kind of aerating wastewater purifiers, to solve mentioned above in the background art ask
Topic.
To achieve the above object, the present invention provides the following technical solutions：
A kind of aerating wastewater purifier, including controller, equipment power supply, gas collecting apparatus and air floatation machine ontology, in air floatation machine sheet
Controller is provided on the left of body, the upper end of controller is equipped with equipment power supply, controller lower end is provided with gas collecting apparatus, in air supporting
Machine ontology left upper end is provided with flocculant adding apparatus and wastewater inlet, and coagulant adding set connects wastewater inlet, gas collection dress
Connection gas-guide tube is set, jet thrust is provided on gas-guide tube, the inside left of air floatation machine ontology is provided with mixing chamber, mixing chamber is set
It is equipped with baffle, deflector is provided on the right side of mixing chamber, air floatation machine ontology upper end is provided with Oil scraper, in air floatation machine ontology lower end
It is provided with mud scraper, settling zone is provided on the right side of deflector, settling zone upper end is provided with water level observation mouth, in Oil scraper bottom right
Side is provided with slag-draining device, and clear water zone one and clear water zone two are provided on the right side of air floatation machine ontology, is arranged in two lower end of clear water zone
There are water outlet, gas-floating chamber to be connected to by return duct with clear water zone two, and centre is provided with knockout drum and air dissolved pump, air dissolved pump
Shutoff valve is provided on the return duct of right end, knockout drum upper end is provided with air bleeding valve；The core element of controller is that ATC is mono-
Piece machine, controller are separately connected air dissolved pump, air bleeding valve, gas collecting apparatus, mud scraper and Oil scraper by single-chip processor i/o interface；If
It is electrically connected between stand-by power source and air dissolved pump, air bleeding valve, gas collecting apparatus, controller, mud scraper, Oil scraper.
As a further solution of the present invention：The equipment power supply includes resistance R8, triode V2, triode V3 and two poles
One end connection capacitance C1 and 220V alternating current of pipe D1, the resistance R8, the other end of the other end connection capacitance C1 of resistance R8,
The port 3 of the port 1 of transient voltage suppressor diode DW and rectifier bridge T, rectifier bridge T connects transient voltage suppressor diode DW's
The port 2 of the other end of the other end and 220V alternating currents, rectifier bridge T connects inductance L1 and capacitance C2, and the other end of capacitance C2 connects
Connect the port 4 of inductance L2 and rectifier bridge T, other end connection capacitance C3, resistance R2, resistance R3, resistance R7, the triode of inductance L1
The collector of the emitter and triode V3 of V2, the other end of the other end connection inductance L2 of capacitance C3, resistance R1, resistance R5,
The collector and output voltage of resistance R6, capacitance C4, a fixing end of potentiometer RP1, the anode of diode D1, triode V4
The base stage of the other end and triode V1 of the other end connection resistance R1 of U1, resistance R7, the emitter of triode V1 connect resistance
The other end of R2, another fixing end of the cathode and potentiometer RP1 of the collector connection diode D1 of triode V1, potentiometer
The base stage of the sliding end connecting triode V5 of RP1, the hair of the base stage and triode V4 of the other end connecting triode V2 of resistance R3
Emitter-base bandgap grading, the base stage of the other end and triode V3 of the collector connection resistance R5 of triode V2, the base stage connection electricity of triode V4
Hinder R4, the collector of the other end connecting triode V5 of resistance R4, the other end, the electricity of the emitter connection resistance R6 of triode V3
Hold the emitter of the other end and triode V5 of C4.
As a further solution of the present invention：The water level observation mouth is connect with settling zone.
As further scheme of the invention：The deflector is inclined at air floatation machine body interior.
As further scheme of the invention：The capacitance C2, capacitance C3, inductance L1 and inductance L2 composition π types filtering
Device.
As further scheme of the invention：The resistance R8 and capacitance C1 form capacitance-resistance voltage reduction circuit.
As further scheme of the invention：The diode D1 is zener diode.
Compared with prior art, the beneficial effects of the invention are as follows：
The present invention designs advantages of simple in structure, uses easy to operate, and practicability is very high, utilizes high stability
Power supply power supply drives each electricity consumption part work, and is provided with controller, without human intervention, saves human resources, realizes high
The separation of effect；The fusion of sewage and gas is more abundant, and the solid separation in sewage is more thorough.
Description of the drawings
Fig. 1 is the structural schematic diagram of aerating wastewater purifier.
Fig. 2 is the structural schematic diagram of gas-guide tube and jet thrust in aerating wastewater purifier.
Fig. 3 is the internal circuit diagram of equipment power supply.
In figure：1- flocculant adding apparatus, 2- coagulant adding set, 3- wastewater inlets, 4- controllers, 5- gas collections dress
It sets, 6- mixing chambers, 7- baffles, 8- gas-guide tubes, 9- jet thrusts, 10- Oil scrapers, 11- mud scrapers, 12- water level observations mouth, 13- row
Slag device, 14- flows mouth, 15- partition boards, the clear water zones 16- one, the clear water zones 17- two, 18- water outlets, 19- deflectors, 20- gas-liquids
Knockout drum, 21- air bleeding valves, 22- air dissolved pumps, 23- shutoff valves, 24- sludge outlets, 25- stomatas, 26- gas-floating chambers, the settling zones 27-,
28- air floatation machines ontology, 29- return ducts, 30- equipment power supplys.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig.1~3, in the embodiment of the present invention, a kind of aerating wastewater purifier, including controller 4, gas collecting apparatus
5 and air floatation machine ontology 28,28 left side of air floatation machine ontology is provided with controller 4, the top of controller 4 is equipped with for entire dress
Set the equipment power supply 30 of power supply, equipment power supply 30 and air dissolved pump 22, air bleeding valve 21, gas collecting apparatus 5, controller 4, mud scraper 11,
It is electrically connected between Oil scraper 10,4 lower end of controller is provided with gas collecting apparatus 5,28 left upper end of air floatation machine ontology is provided with wadding
Solidifying agent adding set 1 and wastewater inlet 3, coagulant adding set 2 connect wastewater inlet 3, and gas collecting apparatus 5 connects gas-guide tube 8, leads
It is provided with jet thrust 9 on tracheae 8, the inside left of air floatation machine ontology 28 is provided with mixing chamber 6, mixing chamber 6 is provided with baffle
7,6 right side of mixing chamber is provided with deflector 19,28 upper end of air floatation machine ontology is provided with Oil scraper 10, under air floatation machine ontology 28
End is provided with mud scraper 11, and 19 right side of deflector is provided with settling zone 27,27 upper end of settling zone is provided with water level observation mouth 12,
10 lower right side of Oil scraper is provided with slag-draining device 13,28 right side of air floatation machine ontology is provided with clear water zone 1 and clear water zone two
17,2 17 lower end of clear water zone is provided with water outlet 18, gas-floating chamber 26 is connected to clear water zone 2 17 by return duct 29, and intermediate
It is provided with knockout drum 20 and air dissolved pump 22, shutoff valve 23, gas-liquid separation are provided on the return duct 29 of 22 right end of air dissolved pump
20 upper end of tank is provided with air bleeding valve 21.
The present invention operation principle be：
At work, the microcontroller inside controller 4 controls flocculant adding apparatus 1, coagulant adding set to the present invention simultaneously
2, gas collecting apparatus 5, knockout drum 20 and air dissolved pump 22 work, and flocculant and coagulant are filled with sewage in mixing chamber 6
Enter gas-floating chamber 26 after dividing mixing, is merged with gas contact in gas-floating chamber, then the dirt of float is along deflector 19
It reaches at Oil scraper 10, slag-draining device 13 is entered by 10 processing of Oil scraper, another part enters settling zone 27, in mud scraper 11
Effect enters sludge outlet, and then is discharged, and the clear water after detaching enters clear water zone 1 from flow mouth 14, after precipitating again
Water enter clear water zone 2 17, and then be discharged from water outlet 18；The water inside air floatation machine can be grasped by water level observation mouth 12
Position, is conveniently adjusted water level；20 side of the knockout drum is provided with air bleeding valve 21, and the pressure in knockout drum 20 reaches one
When definite value, discharge gas is automatically opened by air bleeding valve 21,29 side of the return duct is provided with shutoff valve 23, passes through shutoff valve
The liquid reflux of 23 control air supporting motor spindles enhances filth-discharging effect, and the air dissolved pump 22 makes liquid be stirred with gas mixing, can increase
Add syncretizing effect.
This equipment is powered by equipment power supply 30, can to air dissolved pump 22, air bleeding valve 21, gas collecting apparatus 5, controller 4, scrape
Mud machine 11, Oil scraper 10 provide stable electric energy, physical circuit as shown in figure 3,220V line voltages pass through by capacitance C1 and
It after the capacitance-resistance voltage reduction circuit decompression of resistance R8 compositions, enters back into and carries out rectification in rectifier bridge T, while the transient voltage suppression in circuit
Diode DW processed is used to eliminate the peak voltage that city's electro-mechanical wave generates, inductance L1, inductance L2, capacitance C2 and capacitance C3 in circuit
Typical pi type filter is formed, mains harmonics interference can be eliminated, to increase the anti-interference of circuit, after power on circuitry, this
Circuit belongs to a serial voltage regulation circuit, and V2, V3 form compound adjustment pipe, rate of doing work output, and V4, V5 complete compare, put jointly
Greatly, R7, V1, D1, RP1, R1, R2 etc. form reference voltage source, and V1, R7 etc. form constant current output to D1, RP1, to ensure that D1 is defeated
Go out the higher reference voltage signal of stability, therefore it is higher defeated in the output end of this voltage-stablizer can to obtain a stability
Go out voltage, and since the amplification factor of the multiple tube of V2, V3 composition is very high, the amplification factor after V4, V5 combination is also very high, therefore
The ripple of this circuit also very little.R5 is bleeder resistance in figure, and R6 is electric power generation unloading resistance.After energization, V1 conductings have initially set up benchmark
Voltage, output end voltage is OV at this time, such as at this time RP1 mid-point voltages≤0.7V, then V5 ends, and corresponding V4, V2, V3 are also cut
Only, output is still OV；The voltage VA of the midpoints RP1 A>0.7v, then V5 is connected, while V4, V2, V3 make also with corresponding conducting
Output end has corresponding voltage output, and voltage of the output voltage always than the midpoints W A is low 0.7V, achievees the purpose that voltage stabilizing is powered.
The present invention designs advantages of simple in structure, uses easy to operate, and practicability is very high, is provided with control
Device saves human resources without human intervention, realizes efficient separation；The fusion of sewage and gas is more abundant, consolidating in sewage
Body separation is more thorough.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiment being appreciated that.
Claims (7)
1. a kind of aerating wastewater purifier, including controller（4）, equipment power supply（30）, gas collecting apparatus（5）With air floatation machine ontology
（28）, which is characterized in that in air floatation machine ontology（28）Left side is provided with controller（4）, controller（4）Upper end be equipped with equipment electricity
Source（30）, in controller（4）Lower end is provided with gas collecting apparatus（5）, in air floatation machine ontology（28）Left upper end is provided with flocculant and adds
Feeder apparatus（1）And wastewater inlet（3）, coagulant adding set（2）Connect wastewater inlet（3）, gas collecting apparatus（5）Connect gas-guide tube
（8）, gas-guide tube（8）On be provided with jet thrust（9）, in air floatation machine ontology（28）Inside left be provided with mixing chamber（6）, mixing
Room（6）It is provided with baffle（7）, mixing chamber（6）Right side is provided with deflector（19）, in air floatation machine ontology（28）Upper end, which is provided with, scrapes
Oil machine（10）, in air floatation machine ontology（28）Lower end is provided with mud scraper（11）, deflector（19）Right side is provided with settling zone（27）,
In settling zone（27）Upper end is provided with water level observation mouth（12）, in Oil scraper（10）Lower right side is provided with slag-draining device（13）,
Air floatation machine ontology（28）Right side is provided with clear water zone one（16）With clear water zone two（17）, in clear water zone two（17）Lower end is provided with out
The mouth of a river（18）, gas-floating chamber（26）With clear water zone two（17）Pass through return duct（29）Connection, and centre is provided with knockout drum
（20）And air dissolved pump（22）, air dissolved pump（22）The return duct of right end（29）On be provided with shutoff valve（23）, knockout drum（20）
Upper end is provided with air bleeding valve（21）；Controller（4）Core element be AT89C51 microcontrollers, controller（4）Pass through microcontroller I/
O Interface is separately connected air dissolved pump（22）, air bleeding valve（21）, gas collecting apparatus（5）, mud scraper（11）And Oil scraper（10）；Equipment electricity
Source（30）With air dissolved pump（22）, air bleeding valve（21）, gas collecting apparatus（5）, controller（4）, mud scraper（11）, Oil scraper（10）Between
Electrical connection.
2. aerating wastewater purifier according to claim 1, which is characterized in that the equipment power supply（30）Including resistance
One end connection capacitance C1 and 220V alternating current of R8, triode V2, triode V3 and diode D1, the resistance R8, resistance R8
The other end of other end connection capacitance C1, transient voltage suppressor diode DW and rectifier bridge T port 1, the port of rectifier bridge T
The other end of the other end and 220V alternating currents of 3 connection transient voltage suppressor diode DW, the port 2 of rectifier bridge T connect inductance
The port 4 of the other end connection inductance L2 and rectifier bridge T of L1 and capacitance C2, capacitance C2, the other end connection capacitance C3 of inductance L1,
The collector of resistance R2, resistance R3, resistance R7, the emitter of triode V2 and triode V3, the other end connection electricity of capacitance C3
Feel the other end of L2, the sun of resistance R1, resistance R5, resistance R6, capacitance C4, a fixing end of potentiometer RP1, diode D1
Pole, the collector of triode V4 and output voltage U1, the other end of the other end connection resistance R1 of resistance R7 and triode V1's
Base stage, the other end of the emitter connection resistance R2 of triode V1, the cathode of the collector connection diode D1 of triode V1 and
The other end of another fixing end of potentiometer RP1, the base stage of the sliding end connecting triode V5 of potentiometer RP1, resistance R3 connects
Connect the emitter of the base stage and triode V4 of triode V2, the other end and triode of the collector connection resistance R5 of triode V2
The base stage of the base stage of V3, triode V4 connects resistance R4, the collector of the other end connecting triode V5 of resistance R4, triode V3
The other end of emitter connection resistance R6, capacitance C4 the other end and triode V5 emitter.
3. aerating wastewater purifier according to claim 1, which is characterized in that the water level observation mouth（12）With precipitation
Area（27）Connection.
4. aerating wastewater purifier according to claim 1, which is characterized in that the deflector（19）It is inclined at
Air floatation machine ontology（28）It is internal.
5. aerating wastewater purifier according to claim 2, which is characterized in that the capacitance C2, capacitance C3, inductance L1
Pi type filter is formed with inductance L2.
6. aerating wastewater purifier according to claim 2, which is characterized in that the resistance R8 and capacitance C1 composition resistances
Hold reduction voltage circuit.
7. aerating wastewater purifier according to claim 2, which is characterized in that the diode D1 is two pole of voltage stabilizing
Pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810036858.1A CN108298626A (en) | 2018-01-15 | 2018-01-15 | A kind of aerating wastewater purifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810036858.1A CN108298626A (en) | 2018-01-15 | 2018-01-15 | A kind of aerating wastewater purifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108298626A true CN108298626A (en) | 2018-07-20 |
Family
ID=62869184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810036858.1A Pending CN108298626A (en) | 2018-01-15 | 2018-01-15 | A kind of aerating wastewater purifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108298626A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110479125A (en) * | 2019-09-03 | 2019-11-22 | 梁荷 | A kind of superpressure aerator and purposes |
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| US20040178152A1 (en) * | 2002-06-25 | 2004-09-16 | Morse Dwain E. | System and method of gas energy management for particle flotation and separation |
| US20050014245A1 (en) * | 2003-05-30 | 2005-01-20 | Advisys, Inc. | Devices and methods for biomaterial production |
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| CN204958451U (en) * | 2015-08-24 | 2016-01-13 | 徐挺 | Automatic dissolve gas air supporting machine |
| CN205490145U (en) * | 2016-03-07 | 2016-08-17 | 深圳市微纳集成电路与系统应用研究院 | Anti -interference direct current export power supply |
| CN206828228U (en) * | 2017-05-09 | 2018-01-02 | 诸城市广晟环保设备有限公司 | A kind of air-dissolving air-float precipitates all-in-one |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040178152A1 (en) * | 2002-06-25 | 2004-09-16 | Morse Dwain E. | System and method of gas energy management for particle flotation and separation |
| US20050014245A1 (en) * | 2003-05-30 | 2005-01-20 | Advisys, Inc. | Devices and methods for biomaterial production |
| CN202754821U (en) * | 2012-08-31 | 2013-02-27 | 王力凡 | Backflow type air flotation oil-removing device with improved efficiency |
| CN203411423U (en) * | 2013-08-16 | 2014-01-29 | 北京首钢国际工程技术有限公司 | Electric-flocculation and dissolved gas gas-flotation complete equipment |
| CN204958451U (en) * | 2015-08-24 | 2016-01-13 | 徐挺 | Automatic dissolve gas air supporting machine |
| CN205490145U (en) * | 2016-03-07 | 2016-08-17 | 深圳市微纳集成电路与系统应用研究院 | Anti -interference direct current export power supply |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110479125A (en) * | 2019-09-03 | 2019-11-22 | 梁荷 | A kind of superpressure aerator and purposes |
| CN110479125B (en) * | 2019-09-03 | 2022-05-10 | 梁荷 | Overpressure aeration device and application |
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Application publication date: 20180720 |
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