CN102765773A - Air floatation device - Google Patents

Air floatation device Download PDF

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Publication number
CN102765773A
CN102765773A CN201210285318XA CN201210285318A CN102765773A CN 102765773 A CN102765773 A CN 102765773A CN 201210285318X A CN201210285318X A CN 201210285318XA CN 201210285318 A CN201210285318 A CN 201210285318A CN 102765773 A CN102765773 A CN 102765773A
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CN
China
Prior art keywords
air
micro
bubble generator
nano bubble
water
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CN201210285318XA
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Chinese (zh)
Inventor
吴迪
金强
张天柱
赵咏梅
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北京中农天陆微纳米气泡水科技有限公司
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Priority to CN201210285318XA priority Critical patent/CN102765773A/en
Publication of CN102765773A publication Critical patent/CN102765773A/en

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Abstract

The invention discloses an air floatation device and belongs to the field of water treating equipment. The air floatation device comprises a micro nanometer bubble generation device, a micro nanometer bubble generator, an air control valve and an air floatation tank, wherein a water inlet tube, an air inlet tube and a water outlet tube are arranged on the micro nanometer bubble generation device, the water inlet tube is used for leading in water, the air control valve is connected onto the air inlet tube, an opening for being connected with an air source is arranged on the air control valve, and the water outlet tube is connected with the micro nanometer bubble generator. A water inlet is arranged on the micro nanometer bubble generator which is arranged in the air floatation tank. The air floatation device is a forcing dissolved gas air floatation device, uses the micro nanometer bubble generator to produce small bubble water and improves air dissolution efficiency. Simultaneously produced small bubbles have negative charge, have good adsorption effect on greasy dirt and particles and greatly improve air floatation effect. The whole device does not need to increase extra operating cost, and the air floatation device is a revolutionary improvement compared with a traditional air floatation method.

Description

Airfloat equipment

Technical field

The present invention relates to water treatment and recycling economy field, relate in particular to the new and effective airfloat equipment in a kind of water technology that can be used for petroleum wastewater, kitchen waste water, oily(waste)water and other oil removal by air bubbling or PM for particulate matter.

Background technology

Handle oily(waste)water at present and adopt the air supporting method more, the air supporting method comprises following several kinds:

(1) pressurized dissolved air flotation method:

Application at home and abroad is the most extensive, and refinery nearly all adopts this method to handle the oil in water emulsion in the waste water and obtains treatment effect preferably.The water outlet oleaginousness can be below 10~25mg/L.The pressurized dissolved air flotation method is under the pressurization situation, and air dissolves is reached state of saturation in waste water, reduces to normal pressure then suddenly; At this moment the air that is dissolved in the water has just become hypersaturated state; Discharge with atomic little bubble, oil in water emulsion and suspended particle with its come-up, form foam layer on every side with regard to adhering to bubble on the water surface; Remove by scraping the bubble device then, waste water is purified.

(2) gas distribution air supporting method:

Gas distribution air supporting is to utilize mechanical shear stress, and the air that is mixed in the water is ground into tiny bubble, to carry out air floating method.By the difference of pulverizing the bubble method, gas distribution air supporting is divided into four kinds of the air-breathing air supporting of water pump water pipe, jet air float, diffused aeration air supporting and turbine air flotations etc. again.

(1) water pump suction pipe sucks air air supporting:

This be the most original also be the simplest a kind of air-float method.The advantage of this method is that equipment is simple, and its shortcoming mainly is the restriction owing to the pump working characteristic, and amount of air drawn can not be too much, generally is not more than 10% of suction volume, otherwise will destroy the negative pressure work of water pump suction pipe.In addition, bubble is broken complete inadequately in water pump, and particle diameter is big, and therefore, air flotation effect is bad.This method is used to handle the petroleum wastewater through behind the grease removal tank, and oil removal efficiency is generally 50%~65%.

(2) jet air float:

Jet air float adopts and carries out air floating method through ejector entrained air in waste water.The high speed waste water that is penetrated by nozzle makes suction chamber form negative pressure; And, after the gas-vapor mix body gets into the trunnion section, carry out fierce energy exchange from air suction pipe suction air, get into diffusor (expansion section) then; Kinetic energy is converted into potential energy; Further compressed bubble has increased the solubleness of air in water, gets into then and accomplishes the air supporting process in the air flotation pool.

(3) diffuser plate aeration air supporting:

This is that early stage air flotation pool adopts the most a kind of cloth gas method.Diffuser plate or the microporous pipe of pressurized air through having micropore makes air get in the water with the form of tiny bubble, carries out the air supporting process.The advantage of this method is simple, but shortcoming is more, and the micropore of wherein main is air-diffuser is easy to stop up, and bubble is bigger, and daf efficiency is not high.Therefore this method is seldom used in recent years.

(4) turbine air flotation:

Turbine air flotation equipment is to be provided with rotary blade in the air flotation pool bottom, is adorning the securing cover plate that has turning vane on the top of impeller, and hole is arranged on the cover plate.When motor drives impeller high speed rotating, under cover plate, form negative pressure, suck air from blast main; Waste water is got into by the aperture on the cover plate, and under the stirring of impeller, air is ground into tiny bubble; And become the gas-vapor mix body with the water thorough mixing, and throwing away outside the turning vane, turning vane reduces flow resistance; Again behind the cowling panel current stabilization, vertical uplift reposefully in the body of pond is carried out air supporting.The foam that forms is constantly scraped outside the groove by scraper plate.This air flotation pool directly transplanting from mineral floating is come.

(3) electrolytic gas float glass process:

The electrolytic gas float glass process is that waste water is carried out electrolysis, at this moment produces a large amount of bubble hydrogens at negative electrode, and the diameter of bubble hydrogen is very little, and 20~100 μ m are only arranged.Suspended particle in the waste water sticks on the bubble hydrogen, with its come-up, thereby has reached the purpose of purifying liquid waste.Meanwhile, the oxyhydroxide that ionization forms on anode plays a part coagulating agent, helps pollutent come-up or sinking in the water.The advantage of electrolytic gas float glass process is to produce a large amount of small bubbles; When utilizing soluble anode, air supporting process and coagulation process combine to carry out; Device construction is simple, is a kind of new purification method for effluent.But, its large-scale promotion and application have been hindered because its current consumption is bigger.

Summary of the invention

Embodiment of the present invention provides a kind of airfloat equipment, can solve the present airfloat equipment general just energy consumption problem of higher of need pressurizeing, and its energy consumption is low and oil removal efficiency is high.

Following for addressing the above problem technical scheme provided by the invention:

Embodiment of the present invention provides a kind of airfloat equipment, and this equipment comprises:

Micro-nano bubble generator, micro-nano bubble generator, gas control valve and air flotation pool; Wherein,

Said micro-nano bubble generator is provided with water inlet pipe, inlet pipe and rising pipe; Said water inlet pipe is used for introducing water inlet; Connect said gas control valve on the said inlet pipe; Said gas control valve is provided with and is used for the opening that is connected with source of the gas, and said rising pipe is connected with said micro-nano bubble generator;

Said micro-nano bubble generator is provided with water outlet, and micro-nano bubble generator is arranged in the said air flotation pool.

Can find out by the above-mentioned technical scheme that provides; The airfloat equipment of embodiment of the present invention cooperates with air flotation pool through micro-nano bubble generator, micro-nano bubble generator, forms a kind of pressure air-dissolving formula airfloat equipment, the micro-bubble water that utilizes the micro-nano foam producer to produce; Not only improved molten gas efficient; The micro-bubble of its generation simultaneously has negative charge, and greasy dirt and particle are had good adsorption, has improved pneumatically supported effect greatly; And entire equipment need not to increase extra working cost, and traditional relatively air supporting method is the improvement of revolution property.

Description of drawings

In order to be illustrated more clearly in the technical scheme of the embodiment of the invention; The accompanying drawing of required use is done to introduce simply in will describing embodiment below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skill in the art; Under the prerequisite of not paying creative work, can also obtain other accompanying drawings according to these accompanying drawings.

The bactericidal oxygenation equipment synoptic diagram that Fig. 1 provides for the embodiment of the invention one;

The micro-nano bubble generator synoptic diagram of the bactericidal oxygenation equipment that Fig. 2 provides for the embodiment of the invention one;

The bactericidal oxygenation equipment synoptic diagram that Fig. 3 provides for the embodiment of the invention two;

The bactericidal oxygenation equipment operation process schema that Fig. 4 provides for the embodiment of the invention;

Each label corresponding components is among the figure: 1, former pond; 2, micro-nano bubble generator; 21, topping-up pump; 22, air-dissolving apparatus; 3, dissolving; 4, micro-nano bubble generator; 5, decompression take-off equipment; 6, air flotation pool; 7, gas control valve; 8, vent valve; 9, blow-off valve; 10, be connected air supporting bypass suction culvert between former pond and the air flotation pool; 11, the water inlet pipe of micro-nano bubble generator; 12, the inlet pipe of micro-nano bubble generator; 13, the rising pipe of micro-nano bubble generator; 14, source of the gas; A, water inlet; B, water outlet.

Embodiment

Below in conjunction with specific embodiment the technical scheme among the present invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on embodiments of the invention, those of ordinary skills belong to protection scope of the present invention not making the every other embodiment that is obtained under the creative work prerequisite.

Do to describe in detail further in the face of the embodiment of the invention down.

Embodiment one

The embodiment of the invention provides a kind of airfloat equipment; It is a kind of efficient air-floating waste-oil scavenger; Can be applied to fields such as wastewater treatment and flotation ore deposit; As shown in Figure 1, this equipment comprises: micro-nano bubble generator 2, micro-nano bubble generator 4, gas control valve 7 and air flotation pool 6 (or flotation cell);

Wherein, Micro-nano bubble generator is provided with water inlet pipe 11, inlet pipe 12 and rising pipe 13; Water inlet pipe 11 is used for introducing water inlet, connects gas control valve 7 on the inlet pipe 12, and gas control valve 7 is provided with and is used for the opening that is connected with source of the gas 14; Through the flow of gas control valve 7 control introducing airs, rising pipe 13 is connected with micro-nano bubble generator 4; Micro-nano bubble generator 4 is provided with water outlet, and micro-nano bubble generator 4 is arranged in the air flotation pool 6, can be arranged on the zone of action in the air flotation pool 6.

On above-mentioned airfloat equipment basis, dissolving 3 and decompression take-off equipment 5 can also be set; Wherein, micro-nano bubble generator 4 can be arranged in the dissolving 3; Dissolving 3 is provided with rising pipe and is connected with decompression take-off equipment 5; Decompression take-off equipment 5 is connected in the air flotation pool 6.The airfloat equipment of this structure carries out water distribution through the dissolving 3 and take-off equipment 5 cooperations of reducing pressure.

Dissolving 3 in the above-mentioned airfloat equipment is airtight tank body, and is withstand voltage greater than 0.8MPa, which is provided with vent valve 8, and vent valve 8 can be arranged on the bottom of dissolving 3, and its bottom is provided with blow-off valve 9.

Decompression take-off equipment 5 adopts reducing valve or low pressure dissolved air release in the above-mentioned airfloat equipment.

As shown in Figure 2, in the above-mentioned airfloat equipment, micro-nano bubble generator 2 comprises: topping-up pump 21 and air-dissolving apparatus 22; Wherein, topping-up pump 21 is connected with rising pipe 12 respectively with air-dissolving apparatus 22; Water inlet pipe 11 is set on the topping-up pump 21; Inlet pipe 12 is set on the air-dissolving apparatus 22.

It is the topping-up pump of 0.2MPa~1MPa that topping-up pump 21 in the above-mentioned micro-nano bubble generator 2 can adopt lift; Air-dissolving apparatus 22 adopts the venturi principle ejector or has the Liqiud-gas mixing device that dissolves airway dysfunction.

Micro-nano bubble generator 4 in aforesaid device can adopt the output bubble diameter to be distributed in the high speed rotary type gas-liquid mixed type micro-nano foam producer of 5~60 μ m.As can to adopt number of patent application be 200610140565.5 high speed rotary type gas-liquid mixed type micro-nano foam producer.This micro-nano bubble generator cooperates with micro-nano bubble generator; Utilize water as medium,, inject the mixed solution after the gas-liquid mixed in the micro-nano bubble generator of ad hoc structure with certain pressure through the ejector or the air dissolved pump negative pressure inlet of venturi principle; With discharging after the cutting of gas high speed rotating; Mainly the distribute bubble of 5~60 μ m of the bubble diameter of its formation is in suspended state in solution, upflow velocity<0.1m/s, such Liqiud-gas mixing device not only can make the gas-to-liquid contact interface increase greatly; Thereby gas-liquid mass transfer efficient is increased greatly, and big leap ahead of micron-sized bubble residence time in solution that produces.Contain abundant oxygen in these micro-nano bubbles; Reserve bank as the dissolved oxygen in the solution; When the dissolved oxygen in the solution reduces; Dissolved oxygen in the bubble will replenish into, forms a metastable gas liquid mixture that can keep dissolved oxygen in higher level for a long time, thereby guarantees the oxygenation demand to water fully.

The aquifer yield of the micro-nano bubble generator 4 in aforesaid device is 0.7~1.0m 3/ h, general aquifer yield is 1m 3/ h.The rising pipe 13 of micro-nano bubble generator 2 can be used as total rising pipe; A plurality of rising pipe arms are told in the water side of this rising pipe; The quantity of micro-nano bubble generator 4 is identical with the quantity of said rising pipe arm, and each micro-nano bubble generator 4 props up pipe coupling with 13 1 rising pipes of rising pipe of said micro-nano bubble generator 2.In the reality, the quantity of micro-nano bubble generator can be provided with according to the aquifer yield of the topping-up pump 21 of micro-nano bubble generator 2, makes topping-up pump 21 pressure of supply waters keep normally producing micro-nano foam and gets final product.If adopt a plurality of micro-nano bubble generators 4, then a plurality of micro-nano bubble generators 4 all are provided with in the air flotation pool 6 or in the dissolving 3.

Air flotation pool 6 in the above-mentioned airfloat equipment or flotation cell can be structures or the equipment that any form has air supporting and flotation function; Be generally and comprise the zone of action; Air supporting divides the constituency, parts such as scum silica frost disengaging zone be separated into the structure formation of main separation means with gas flotation.As can adopt commonly used have flat flow, vertical-flow, pot type, ramp type air flotation pool etc.

In the above-mentioned airfloat equipment, source of the gas 14 can also be set, be connected, be the airfloat equipment air feed with the opening of gas control valve 7 on the inlet pipe 12 of micro-nano bubble generator.Several kinds of forms below source of the gas 14 can adopt:

Can adopt air or gas blower; Also can adopt as source of the gas 14 with atmosphere; Make the direct and atmosphere of opening of gas control valve 7; Can be under condition of negative pressure directly and atmosphere, can control the gas flow of the inlet pipe that gets into micro-nano bubble generator easily through gas control valve 7.

Further, on above-mentioned airfloat equipment basis, former pond can be set, thereby be connected to form a kind of airfloat equipment of self-circulation, specifically be divided into following several kinds of structure formations with other part:

(1) former pond 1 is set on above-mentioned airfloat equipment basis;

Wherein, the water outlet in former pond 1 is connected with the water inlet pipe of micro-nano bubble generator 2.

The airfloat equipment of this structure, the water inlet of micro-nano bubble generator be from whole waste water in former pond, pass through micro-nano bubble generator, micro-nano bubble generator and dissolving successively after; Generation contains the water of a large amount of micro-nano bubbles; The water outlet of dissolving gets into the air flotation pool zone of action, the bubble abrupt release through behind the reducing valve; The direct draining of water outlet after the air supporting, scum silica frost is removed.

(2) former pond 1 and air supporting bypass suction culvert 10 on above-mentioned airfloat equipment basis;

Wherein, the water outlet in former pond is connected with the water inlet pipe of micro-nano bubble generator; The water outlet in former pond 1 is connected with the water-in of air flotation pool 6 through air supporting bypass suction culvert 10.

The airfloat equipment of this structure; The water inlet of micro-nano bubble generator is from the part waste water in former pond (all the other waste water directly get into the zone of action of air flotation pool through the pipeline that is connected between former pond and the air flotation pool); After passing through micro-nano bubble generator, micro-nano bubble generator and dissolving successively, produce the water that contains a large amount of micro-nano bubbles, the water outlet of dissolving is through behind the reducing valve; Get into the air flotation pool zone of action; The bubble abrupt release, the direct draining of the water outlet after the air flotation pool air supporting, scum silica frost is removed.

(3) former pond 1 is set on above-mentioned airfloat equipment basis;

Wherein, the water outlet in former pond 1 is connected with the water-in of air flotation pool 6 through pipeline; The water outlet of air flotation pool 6 is connected with the water inlet pipe of micro-nano bubble generator.

The airfloat equipment of this structure, the water inlet of micro-nano bubble generator be from the part water outlet (10%~50%) of air flotation pool flotation area, pass through micro-nano bubble generator, micro-nano bubble generator and dissolving successively after; Generation contains the water of a large amount of micro-nano bubbles; The water outlet of dissolving gets into the air flotation pool zone of action, the bubble abrupt release through behind the reducing valve; The direct draining of water outlet after the air flotation pool air supporting, scum silica frost is removed.

In order to increase the hydrophobicity of suspended particle in the waste water, improve air flotation effect, can add chemical agent---flotation agent to the water inlet front end of micro-nano bubble generator, flotation agent is commonly used has several kinds of collecting agent, pore forming material, adjustment agent etc.

In sum, the airfloat equipment of the embodiment of the invention has the following advantages:

(1) adopt the high speed rotary type gas-liquid mixed type micro-nano foam producer to cooperate with micro-nano foam generating device; Can increase the molten gas efficient of pressure air-dissolving formula airfloat equipment greatly through producing a large amount of micro/nano level bubbles, thereby improve the processing efficiency of pressurized dissolved air flotation;

(2) microbubble of high speed rotary type gas-liquid mixed type micro-nano foam producer generation has electronegative characteristic; These bubbles can be mutually exclusive; Thereby can not be gathered into air pocket, in addition, through the electro-adsorption characteristic of negative charge; Can adsorb and catch grease, PM for particulate matter etc., it is effectively separated.

(3) this equipment has improved the treatment effect of pressurized dissolved air flotation greatly, but reaction power and running cost do not increase.

The above; Be merely the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technician who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.

Claims (10)

1. an airfloat equipment is characterized in that, this equipment comprises:
Micro-nano bubble generator, micro-nano bubble generator, gas control valve and air flotation pool; Wherein,
Said micro-nano bubble generator is provided with water inlet pipe, inlet pipe and rising pipe; Said water inlet pipe is used for introducing water inlet; Connect said gas control valve on the said inlet pipe; Said gas control valve is provided with and is used for the opening that is connected with source of the gas, and said rising pipe is connected with said micro-nano bubble generator;
Said micro-nano bubble generator is provided with water outlet, and micro-nano bubble generator is arranged in the said air flotation pool.
2. airfloat equipment as claimed in claim 1 is characterized in that, also comprises: dissolving and decompression take-off equipment;
Said micro-nano bubble generator is arranged on said dissolving;
Said dissolving is provided with rising pipe and is connected with said decompression take-off equipment;
Said decompression take-off equipment is connected in the said air flotation pool.
3. airfloat equipment as claimed in claim 2 is characterized in that, said dissolving is airtight tank body, and is withstand voltage greater than 0.8MPa, which is provided with vent valve, and its bottom is provided with blow-off valve;
Said decompression take-off equipment adopts reducing valve or low pressure dissolved air release.
4. airfloat equipment as claimed in claim 1 is characterized in that, also comprises: source of the gas is connected with said gas control valve;
Perhaps, the opening of said gas control valve directly with atmosphere as source of the gas.
5. airfloat equipment as claimed in claim 4 is characterized in that, said source of the gas adopts air or gas blower or atmosphere.
6. airfloat equipment as claimed in claim 1 is characterized in that, said micro-nano bubble generator comprises:
Topping-up pump and air-dissolving apparatus; Wherein,
Said topping-up pump is connected with said rising pipe respectively with air-dissolving apparatus;
Said water inlet pipe is set on the said topping-up pump;
Said inlet pipe is set on the said air-dissolving apparatus.
7. airfloat equipment according to claim 6 is characterized in that, it is the topping-up pump of 0.2MPa~1MPa that said topping-up pump adopts lift;
Said air-dissolving apparatus adopts the venturi principle ejector or has the Liqiud-gas mixing device that dissolves airway dysfunction.
8. equipment according to claim 1 is characterized in that, said micro-nano bubble generator adopts the output bubble diameter to be distributed in the high speed rotary type gas-liquid mixed type micro-nano foam producer of 5~60 μ m; The aquifer yield of said micro-nano bubble generator is 0.7~1.0m 3/ h; Said micro-nano bubble generator is a plurality of.
9. like each described airfloat equipment of claim 1~8, it is characterized in that, also comprise: former pond,
The water outlet in said former pond is connected with the water inlet pipe of said micro-nano bubble generator;
Perhaps, also comprise: former pond and air supporting bypass suction culvert, the water outlet in said former pond is connected with the water inlet pipe of said micro-nano bubble generator; The water outlet in said former pond is connected with the water-in of said air flotation pool through air supporting bypass suction culvert.
10. like each described airfloat equipment of claim 1~8; It is characterized in that; Also comprise: former pond, the water outlet in said former pond is connected with the water-in of said air flotation pool through pipeline, and the water outlet of said air flotation pool is connected with the water inlet pipe of said micro-nano bubble generator.
CN201210285318XA 2012-08-10 2012-08-10 Air floatation device CN102765773A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104891616A (en) * 2015-05-28 2015-09-09 中国石油化工股份有限公司 Oily wastewater purification method and system
CN104888636A (en) * 2015-05-28 2015-09-09 中国石油化工股份有限公司 Micro-nano bubble generation device and sewage purification system
CN104961289A (en) * 2015-03-27 2015-10-07 湖北源中清生物环保科技有限公司 Micro-nano aeration high-efficiency biotreatment technical system for livestock and poultry breeding wastewater
CN105481039A (en) * 2015-12-31 2016-04-13 天津汉晴环保科技有限公司 Air flotation pressure dissolved air type device
CN105565414A (en) * 2015-12-31 2016-05-11 天津汉晴环保科技有限公司 Pressure air dissolving device of air float
CN105941295A (en) * 2016-04-21 2016-09-21 佛山市百特利农业生态科技有限公司 Ecological balancing instrument used for aquaculture

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JPH11309446A (en) * 1998-04-30 1999-11-09 Mitsubishi Heavy Ind Ltd Composite water purifying device
KR100582267B1 (en) * 2004-06-09 2006-05-23 정순우 A way and a device to manufacture micro bubble using by micro-filter
CN101164680A (en) * 2006-10-17 2008-04-23 金强 High speed rotary type gas-liquid mixed type micro-nano foam generating device
CN201240875Y (en) * 2008-07-31 2009-05-20 斯志光 Jet type air floating machine
CN101618896A (en) * 2009-08-06 2010-01-06 上海天丰环保有限公司 Current ejector aerated water preparation device
CN202705080U (en) * 2012-08-10 2013-01-30 北京中农天陆微纳米气泡水科技有限公司 Air flotation device

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JPH11309446A (en) * 1998-04-30 1999-11-09 Mitsubishi Heavy Ind Ltd Composite water purifying device
CN1210092A (en) * 1998-09-21 1999-03-10 孙光跃 Water treatment process by jet gas soluted floatation
KR100582267B1 (en) * 2004-06-09 2006-05-23 정순우 A way and a device to manufacture micro bubble using by micro-filter
CN101164680A (en) * 2006-10-17 2008-04-23 金强 High speed rotary type gas-liquid mixed type micro-nano foam generating device
CN201240875Y (en) * 2008-07-31 2009-05-20 斯志光 Jet type air floating machine
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CN202705080U (en) * 2012-08-10 2013-01-30 北京中农天陆微纳米气泡水科技有限公司 Air flotation device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104961289A (en) * 2015-03-27 2015-10-07 湖北源中清生物环保科技有限公司 Micro-nano aeration high-efficiency biotreatment technical system for livestock and poultry breeding wastewater
CN104891616A (en) * 2015-05-28 2015-09-09 中国石油化工股份有限公司 Oily wastewater purification method and system
CN104888636A (en) * 2015-05-28 2015-09-09 中国石油化工股份有限公司 Micro-nano bubble generation device and sewage purification system
CN105481039A (en) * 2015-12-31 2016-04-13 天津汉晴环保科技有限公司 Air flotation pressure dissolved air type device
CN105565414A (en) * 2015-12-31 2016-05-11 天津汉晴环保科技有限公司 Pressure air dissolving device of air float
CN105941295A (en) * 2016-04-21 2016-09-21 佛山市百特利农业生态科技有限公司 Ecological balancing instrument used for aquaculture
CN105941295B (en) * 2016-04-21 2019-06-25 佛山市百特利农业生态科技有限公司 A kind of ecological balance instrument for aquaculture

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Application publication date: 20121107