CN1304887A - Efficient flow-mixing oxygen-enriching process for treating sewage - Google Patents
Efficient flow-mixing oxygen-enriching process for treating sewage Download PDFInfo
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- CN1304887A CN1304887A CN00127816A CN00127816A CN1304887A CN 1304887 A CN1304887 A CN 1304887A CN 00127816 A CN00127816 A CN 00127816A CN 00127816 A CN00127816 A CN 00127816A CN 1304887 A CN1304887 A CN 1304887A
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- oxygen
- gas
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- enriching
- efficient flow
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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
An efficient flow-mixing oxygen-enrich method for treating sewage features that the water is tangently filled into a cylinder by high-pressure water pump while the air is released into said cylinder by air compressor or oxygen cylinder via the microholes of said cylinder, when said cylinder is rotating at high speed a negative pressure is formed in the cylinder and the air becomes microbubbles, and the liquid-air mixture is released at different depthes of water region via the aerating device with microholes.
Description
What the present invention relates to is a kind of method of waste water control oxygenation, and particularly a kind of method of waste water control efficient flow-mixing oxygen-enriching belongs to the environment protection sewage process field.
In the big lake of China near the city, as Kunming Dianchi lake, Chaohu, Hefei etc., in the nitrogen in input lake, the phosphorus total load, have 50% approximately from municipal effluent, 50% from basin non-point source rainwash and lake region precipitation, far away from the city or be subjected to urban industry waste water, sanitary sewage discharging to influence less lake, reservoir, as Gaozhou county reservoir, Dianshan Lake, Nansi Lake etc., the nutrition load is mainly from the pollution of area source of lake drainage, and its nitrogen, phosphorus load account for the 60-70% into the lake total load.Therefore control source of pollution and waters algal control are current important steps of preventing and treating China's lake eutrophication in the waste water control, utilize the physics method to remove algae, algal control is one of the most safe and reliable method, analyze from the data searching of prior art, all there are the low situation of oxygenation utilization ratio in oxygenation or inflation mechanism mostly, are everlasting 25～30%.U.S. Patent number 4774031, Aire-O
2Aspirator aerator (containing oxygen suction inflator), this device is used for industry and municipal sewage treatment, inflator is installed on the drift device of floating ship or PVC, utilize the rock power supply to be used as power, motor surfaces, during running, propeller-driven water high-speed motion, in in the wind box of transmission shaft, forming to pressure, make air under the promotion of barometric point, be inhaled into wind box, and making tiny bubble enter water screw waters on every side, the major parts of this inflator is by motor, Hollow Transmission Shafts, in the transmission shaft position wind box is arranged, and be installed in the vertical water screw of transmission shaft, scatterer etc.Because this aerating machine is fixed aerating machine, mode by combination enlarges the oxygenation scope, better for mobile water body effect, but the oxygenation scope owing to its each aerating machine in immobilising water body is certain, and between the waters beyond meeting and the oxygenation zone behind the certain hour, form the isolation strip, make oxygen-transfer efficiency reduce (the low son 10% of the utilization ratio of oxygen behind the formation isolation strip) greatly, the use range limitation is big.When this when fixed installation device, can only the service zone, aeration is inhomogeneous, easily produces the dead angle; Device on floating ship or PVC device the time owing to use bank electrical actuation power, inconvenient operation and under inclement weather conditions, stable inadequately.The bank electricity has limited its use range again, in actual deep water and shallow water, is subjected to the influence of mechanical factor, and what water screw can not be done is very long or very short; When water level was low, the duration of contact of air and water was shorter, can reduce oxygen transfer rate; And price is higher, and energy consumption is also higher, and above-mentioned this oxygen charging method and equipment are not suitable for the application of China present stage sewage work, middle-size and small-size river course and lake sewage disposal.
The objective of the invention is to overcome deficiency of the prior art, a kind of method of waste water control efficient flow-mixing oxygen-enriching is provided.
Technical scheme of the present invention is as follows: in the aerobe of waste water is handled, need constantly to the treatment system input air, to provide matrix oxygenolysis and microorganism growth required oxygen.The transition process of oxygen from the gas phase to the liquid phase, owing to there is an interface between gas-liquid two-phase, under any fluid dynamics condition, the surface film that the both sides, interface all are made up of gas molecule and fluid molecule one deck is respectively gas, liquid biphase main body stream on film both sides, top layer.In the transmittance process of oxygen, oxygen molecule at first in the mode of molecular diffusion, passes surface film from the gas phase main body under the interaction of gas one liquid molecule, finish dissolution process on phase interface, passes through liquid level then, enters the liquid phase main body.Because the abundant turbulence of fluidic in the main body stream, the concentration of oxygen is tending towards evenly gradually in the two-phase, can think main body flow in the resistance to mass transfer of oxygen molecule go to zero; Oxygen molecule is in a series of diffusion process, and its resistance to mass transfer is mainly from intermolecular interaction, and the total-resistance that whole process need overcomes equals respectively to go on foot the resistance sum.The material transfer speed of gas-liquid two-phase depends on the speed of air film and liquid film molecular diffusion, and the thickness of film and the spread coefficient of mass transfer are inversely proportional to, and turbulent extent is strong more relatively, and the spread coefficient of mass transfer is high more, and then the thickness of film is low more; The gas-liquid two-phase concentration difference is big more, and then dissolved efficiency is high more; Contact surface between the gas-liquid is big more, and then the meltage of unit time solute is big more.For this reason, the present invention is instrument with the rotary barrel, the cylindrical shell high speed rotating, gas-liquid two-phase is carried out mixed flow, at first high pressure water is injected cylindrical shell, source of the gas is emitted by the intravital micropore of tube by pneumatic plant or oxygen canister by water pump, form negative pressure in tube, gas forms small bubble rapidly; Gas liquid mixture sprays in the depth water layer in each waters by the aerator that is provided with micropore.Rotary barrel can be provided with the several layers sleeve and carry out the mixed flow stir process, and the number of plies can be determined according to water quality and needs.The hydraulic pressure, the air pressure that charge into cylindrical shell also can be set according to the situation of water quality.The mode of the present invention to move carried out aeration oxygen replenishing to all kinds of waters, without any the dead angle area that forms as fixed aeration oxygen replenishing.The present invention also can move on on the ship according to actual needs.
Embodiment below further is provided:
Enter by water inlet pipe with pump feedwater pressurization and to carry out high speed rotating in the cylindrical shell, under the high speed centrifugation effect, form high-strength eddy flow; The source of the gas of inlet pipe can be pure oxygen or air, by air compressor machine or oxygen canister air or oxygen is pressed in the tube; In mixed flow, water and gas thorough mixing in cylindrical shell, under the effect of swiftly flowing current, make oxygen form micron bubble, with the aqueous vapor thorough mixing, pressure makes the tension force of liquid-vapo(u)r interface destroy rapidly, and the moment that high-strength turbulent flow takes advantage of gas phase and liquid interface to disappear finishes by the transmission of gas phase to liquid phase; Well-mixed air-water mixture sprays through aerator.In the process of high pressure water and the violent blending of high pressure gas, increased the duration of contact and the contact area of air water, break the gas-liquid two membranes, oxygen molecule was finished from the conversion of gas phase to liquid phase in moment (1-2ms).The present invention can realize the mean diameter of bubble below 1.8 μ m, has surpassed the standard of 2.2 μ m of U.S. environmental protection organization formulation; In the dark more place of water level, the duration of contact of gas and water is also long more, and the utilization ratio of oxygen is also just high more, and oxidation effect is good more, and DO reaches as high as 16mg/l.
The present invention has substantive distinguishing features and marked improvement, and the present invention can be used on the hull, carries out full aeration of stretches oxygenation, also can be used on demand carry out complete portable oxygenation, makes the water generates maelstrom, does not have the dead angle.The confinement phenomenon of avoiding aerator to produce fully.Under the 1.1KW power condition, flow 40m
3The oxygenation capacity of/h pure oxygen flow-mixing oxygen-enriching system is 4.3kgO
2/ h, dynamic efficiency is 3.91kgO
2/ KW.h, mixing efficiency is 0.125KW/m
3, the utilization ratio of oxygen＞＞30%
Claims (4)
1, a kind of method of waste water control efficient flow-mixing oxygen-enriching, it is characterized in that with the rotary barrel being instrument, gas-liquid two-phase is carried out mixed flow, at first high pressure water is injected cylindrical shell by water pump, by pneumatic plant or oxygen canister source of the gas is emitted by the intravital micropore of tube, the cylindrical shell high speed rotating forms negative pressure in tube, gas forms small bubble rapidly; Gas liquid mixture sprays in the depth water layer in each waters by the aerator that is provided with micropore.
2, the method for this waste water control efficient flow-mixing oxygen-enriching according to claim 1, its feature are that also with rotary barrel the several layers sleeve can be set carries out the mixed flow processing, and the number of plies can be determined according to water quality and needs.
3, the method for this waste water control efficient flow-mixing oxygen-enriching according to claim 1, its feature also are to charge into hydraulic pressure, the air pressure of cylindrical shell and also can set according to the situation of water quality.
4, the method for this waste water control efficient flow-mixing oxygen-enriching according to claim 1, its feature also is transportable mode, and aeration oxygen replenishing is carried out in all kinds of waters, also can move on the ship according to actual needs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00127816A CN1131177C (en) | 2000-12-07 | 2000-12-07 | Efficient flow-mixing oxygen-enriching process for treating sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00127816A CN1131177C (en) | 2000-12-07 | 2000-12-07 | Efficient flow-mixing oxygen-enriching process for treating sewage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1304887A true CN1304887A (en) | 2001-07-25 |
| CN1131177C CN1131177C (en) | 2003-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00127816A Expired - Fee Related CN1131177C (en) | 2000-12-07 | 2000-12-07 | Efficient flow-mixing oxygen-enriching process for treating sewage |
Country Status (1)
| Country | Link |
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| CN (1) | CN1131177C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102765797A (en) * | 2012-07-13 | 2012-11-07 | 北京中农天陆微纳米气泡水科技有限公司 | Irrigation water oxygenation device |
| CN103979665A (en) * | 2014-04-25 | 2014-08-13 | 中国科学技术大学 | Double-fluid micro-bubble spraying generating device |
-
2000
- 2000-12-07 CN CN00127816A patent/CN1131177C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102765797A (en) * | 2012-07-13 | 2012-11-07 | 北京中农天陆微纳米气泡水科技有限公司 | Irrigation water oxygenation device |
| CN103979665A (en) * | 2014-04-25 | 2014-08-13 | 中国科学技术大学 | Double-fluid micro-bubble spraying generating device |
| CN103979665B (en) * | 2014-04-25 | 2015-04-22 | 中国科学技术大学 | Double-fluid micro-bubble spraying generating device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1131177C (en) | 2003-12-17 |
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