CN101928057A - Car washing wastewater purifying device adopting photocatalytic oxidation technology - Google Patents
Car washing wastewater purifying device adopting photocatalytic oxidation technology Download PDFInfo
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- CN101928057A CN101928057A CN200910053559XA CN200910053559A CN101928057A CN 101928057 A CN101928057 A CN 101928057A CN 200910053559X A CN200910053559X A CN 200910053559XA CN 200910053559 A CN200910053559 A CN 200910053559A CN 101928057 A CN101928057 A CN 101928057A
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- wastewater
- car washer
- refining plant
- quartz sand
- photocatalytic oxidation
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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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Abstract
The invention relates to a car washing wastewater purifying device adopting a photocatalytic oxidation technology, which comprises a wastewater container, wherein the wastewater container is internally provided with a lifting pump and is connected with a coarse filter, the coarse filter is connected with a quartz sand filter, the quartz sand is connected with a photocatalytic oxidation device, a pipeline of the quartz sand filter and the photocatalytic oxidation device is provided with an ejector, the photocatalytic oxidation device is connected with a clear water tank, and the lower end of the bottom of the clear water tank is provided with a water outlet. Nano titanium dioxide is used as a photocatalyst, the invention replaces a common wastewater treatment process for treating organic matters in wastewater, lowering COD in the wastewater, improving the ratio of BOD/COD in the wastewater, increasing the biodegradability of the wastewater and providing better conditions for wastewater outlet and subsequent treatment.
Description
Technical field
The present invention relates to water technology, relate in particular to the wastewater from car washer purification techniques, particularly a kind of wastewater from car washer refining plant that adopts photocatalysis oxidation technique.
Background technology
Photocatalytic oxidation is the nearly 20 years water technologies that just occur, and can be CO with the organism permineralization usually in the enough reaction times
2And H
2Simple inorganics such as O has been avoided secondary pollution, and is simple efficient and rising.So-called light-catalyzed reaction, the chemical reaction that under the effect of light, carries out exactly.Photochemical reaction needs the electromagnetic radiation of molecular absorption specific wavelength, is excited to produce molecular-excited state, chemical reaction can take place then generate new material, perhaps becomes the middle chemical product that causes thermal response.Photochemically reactive activation energy derives from the energy of photon, and photoelectricity conversion and photochemical transformation are ten minutes active research fields always in the utilization of sun power.The problem that has the catalyst separating recovery owing to the photocatalytic oxidation that with the titania powder is catalyzer, therefore influenced the application in practice of this technology, catalyzer has been fixed on some carrier to avoid or the easier technology that makes its Separation and Recovery has caused the extensive interest of Chinese scholars.
Vehicle in the process of moving, vehicle body is polluted by atmospheric falling dust, rainfall and road surface easily.All contaminants will be transferred in the waste water of carwash in the carwash process.For the car in the general city, its vehicle body is through after cleaning, and the average COD of wastewater from car washer is about 200mg/L.Do not recycle if it is not just suitably handled, after its COD concentrates in waste water, can further raise.Cause the water quality deterioration of waste water, it is smelly to turn black, and can't continue to recycle.Therefore the COD concentration of handling in the wastewater from car washer is to handle one of important factor of wastewater from car washer well.
Summary of the invention:
The object of the present invention is to provide a kind of wastewater from car washer refining plant that adopts photocatalysis oxidation technique, the wastewater from car washer refining plant of described this employing photocatalysis oxidation technique will solve the technical problem that wastewater from car washer of the prior art influences environment.
A kind of wastewater from car washer refining plant that adopts photocatalysis oxidation technique of the present invention, constitute by a waste water container, be provided with a lifting water pump in the described waste water container, described waste water container is connected with a coarse filter, described coarse filter is connected with a quartz sand filtration device, described quartz sand filtration device is connected with a photocatalytic oxidation device, the pipeline of described quartz sand filtration device and described photocatalytic oxidation device is provided with an ejector, described photocatalytic oxidation device is connected with a filtered water tank, and the lower end, bottom of described filtered water tank is provided with a water outlet.
Further, the bottom of described filtered water tank is provided with one second water outlet, is provided with a connecting tube between described second water outlet and the described quartz sand filtration device, and described connecting tube is provided with a water pump.
Further, the connecting pipeline between described coarse filter and the described quartz sand filtration device is provided with a under meter.
Further, described photocatalytic oxidation device inside is provided with a stainless (steel) wire that scribbles nanometer titanium dioxide coating.
Further, the top of described filtered water tank is provided with a upflow tube.
Further, be provided with a liquidometer in the described filtered water tank.
Further, be provided with a mechanical ball float in the described filtered water tank.
Further, the pipeline of described ejector and described photocatalytic oxidation device is provided with an intake ducting, and described intake ducting is provided with a valve.
Further, described waste water container has a preliminary sedimentation tank, second pond and transition pond to constitute, be provided with first connecting tube between described preliminary sedimentation tank and the described second pond, be provided with one second connecting tube between described second pond and the described transition pond.
Further, be provided with a liquidometer in the described transition pond.
Principle of work of the present invention is: photocatalytic activity is the efficient decision shifted by the absorb light ability of catalyzer, charge separation with to substrate.After Nano semiconductor particles was subjected to photon irradiation greater than the energy gap energy, electronics transitted to conduction band and has produced electron-hole pair from valence band.Electronics has reductibility, and the hole has oxidisability, thereby has promoted organic synthetic or make organic matter degradation.The characteristic and the catalytic effect of nano semiconductor material are had nothing in common with each other, and are significantly increased but compare with corresponding body phase material as their catalytic activity of photocatalyst, and its principle is: the blue shift that 1. causes ABSORPTION EDGE by the quantum size confinement; 2. energy level and the transition choosing rule by scattering causes spectral absorption and emission behavior texture ratio; 3. compare with body phase material, the hot carrier speed of cooling in the quantum well descends, and quantum yield improves; 4. the quantum size effect that Nano semiconductor particles had makes its conduction band and valence-band level become discrete energy level, energy gap broadens, the conduction band current potential becomes more negative, the corrigendum and the valence band current potential becomes, this means that Nano semiconductor particles has obtained stronger reduction and oxidation capacity, thereby catalytic activity improves with the raising of size quantization degree.In addition, also be the particle diameter and the absorption characteristic of Nano semiconductor particles.
The particle diameter of Nano semiconductor particles is usually less than the thickness of space charge layer.In the case, any influence of space charge layer all can be ignored, and photo-generated carrier can with electron donor or acceptor reduction or oxidizing reaction take place by simply spreading from the particle internal migration to particle surface.More little then electronics of particle diameter and hole-recombination probability are more little, and the charge separation effect is good more, thereby cause the raising of catalytic activity.In light-catalyzed reaction, the surface that reactant is adsorbed on catalyzer is a preposition step of light-catalyzed reaction, and the speed of catalyzed reaction is relevant with the adsorptive capacity of this material on catalyzer.The adsorption effect that Nano semiconductor particles is strong even allow the preferential material of photo-generated carrier to react and no matter the redox potential of other materials order in the solution with absorption.In catalytic reaction process, the surface property of nano material and defects count have the effect of no less important.
The catalytic effect of nanocatalyst is also relevant with its material type.Discover that the metal oxide that energy gap is big has more practical value because of having anti-photoetch.The energy gap of CdS is narrower, and to the visible light sensitivity, lattice sulphur is with sulfide and SO when playing katalysis
3 2-Form enters in the solution.ZnO compares TiO
2The catalytic activity height, but photoetch can take place in self.α-Fe
2O
3Can absorb visible light (excitation wavelength is 560nm), but catalytic activity is low.Compare TiO with other n N-type semiconductorN nano materials
2Having characteristics such as chemical stability is good, reactive behavior is big, is a kind of photoelectric functional material of excellence, and is widely used in the degraded of pollutent with its superior catalytic performance, has obtained challenging progress.Use nano-TiO
2The test of making the catalyst oxidation water pollutant is that the focus of present research work (mainly around this theme of degradation effect of dissimilar pollutents, carries out TiO in the water treatment system simultaneously
2The research of utilisation technology such as existence form, type of reactor).Result of study shows, nano-TiO
2Photocatalysis oxidation technique has good prospects for application.
Nano titanium oxide has following advantage: TiO as photocatalyst
2Easily separated and the repeated use of photocatalysis oxidation reaction catalyzer.The reaction conditions gentleness is carried out at normal temperature, normal pressure usually, and is easy to operate.Can not produce secondary pollution.
After wastewater from car washer enters waste water container, through just heavy, two heavy after, enter the transition pond, most of particulate matter in the waste water or dirt can be deposited in preliminary sedimentation tank and the second pond, the waste water that enters in the transition pond is sent into the coarse filter filtration by lift pump, filter out greasy dirt, enter the quartz sand filtration device then, the quartz sand filtration device utilizes quartz sand filter media to remove suspended substance in the former water, part in the quartz sand filtration device is disposed to municipal sewage pipe network, another part enters photocatalytic oxidation device by pipeline, and by the COD in the photocatalytic oxidation device removal water, it is standby that the qualified water of taking a sample enters filtered water tank.Bottom in the filtered water tank is provided with a water shoot, by water shoot the water in the quartz sand filtration device is recoiled.
The present invention and prior art contrast, and its effect is actively with tangible.The present invention uses nano titanium oxide as photocatalyst, replaces general domestic sewage treatment process, handles the organism in the waste water, reduce the COD in the waste water, improve the ratio of BOD/COD in the waste water, improve its biodegradability, better condition is provided for wastewater effluent, subsequent disposal.
Description of drawings:
Fig. 1 is a kind of structural representation that adopts the wastewater from car washer refining plant of photocatalysis oxidation technique of the present invention.
Embodiment:
As shown in Figure 1, a kind of wastewater from car washer refining plant that adopts photocatalysis oxidation technique of the present invention, constitute by a waste water container 1, be provided with a lifting water pump 2 in the described waste water container 1, described waste water container 1 is connected with a coarse filter 3, described coarse filter 3 is connected with a quartz sand filtration device 4, described quartz sand filtration device 4 is connected with a photocatalytic oxidation device 5, the pipeline of described quartz sand filtration device 4 and described photocatalytic oxidation device 5 is provided with an ejector 6, described photocatalytic oxidation device 5 is connected with a filtered water tank 7, and the lower end, bottom of described filtered water tank 7 is provided with a water outlet 8.
Further, the bottom of described filtered water tank 7 is provided with one second water outlet 9, is provided with a connecting tube between described second water outlet 9 and the described quartz sand filtration device 4, and described connecting tube is provided with a water pump 10.
Further, the connecting pipeline between described coarse filter 3 and the described quartz sand filtration device 4 is provided with a under meter 11.
Further, described photocatalytic oxidation device 5 inside are provided with a stainless (steel) wire that scribbles nanometer titanium dioxide coating.
Further, the top of described filtered water tank 7 is provided with a upflow tube 12.
Further, described filtered water tank 7 in be provided with a liquidometer 13.
Further, be provided with a mechanical ball float 14 in the described filtered water tank 7.
Further, the pipeline of described ejector 6 and described photocatalytic oxidation device 5 is provided with an intake ducting 15, and described intake ducting 15 is provided with a valve 16.
Further, described waste water container 1 has a preliminary sedimentation tank 17, second pond 18 and transition pond 19 to constitute, be provided with first connecting tube between described preliminary sedimentation tank 17 and the described second pond 18, be provided with one second connecting tube between described second pond 18 and the described transition pond 19.
Further, be provided with a liquidometer 20 in the described transition pond 19.
Claims (10)
1. wastewater from car washer refining plant that adopts photocatalysis oxidation technique, constitute by a waste water container, it is characterized in that: be provided with a lifting water pump in the described waste water container, described waste water container is connected with a coarse filter, described coarse filter is connected with a quartz sand filtration device, described quartz sand filtration device is connected with a photocatalytic oxidation device, the pipeline of described quartz sand filtration device and described photocatalytic oxidation device is provided with an ejector, described photocatalytic oxidation device is connected with a filtered water tank, and the lower end, bottom of described filtered water tank is provided with a water outlet.
2. the wastewater from car washer refining plant of employing photocatalysis oxidation technique as claimed in claim 1, it is characterized in that: the bottom of described filtered water tank is provided with one second water outlet, be provided with a connecting tube between described second water outlet and the described quartz sand filtration device, described connecting tube is provided with a water pump.
3. the wastewater from car washer refining plant of employing photocatalysis oxidation technique as claimed in claim 1 is characterized in that: the connecting pipeline between described coarse filter and the described quartz sand filtration device is provided with a under meter.
4. the wastewater from car washer refining plant of employing photocatalysis oxidation technique as claimed in claim 1 is characterized in that: described photocatalytic oxidation device inside is provided with a stainless (steel) wire that scribbles nanometer titanium dioxide coating.
5. the wastewater from car washer refining plant of employing photocatalysis oxidation technique as claimed in claim 1 is characterized in that: the top of described filtered water tank is provided with a upflow tube.
6. the wastewater from car washer refining plant of employing photocatalysis oxidation technique as claimed in claim 1 is characterized in that: be provided with a liquidometer in the described filtered water tank.
7. the wastewater from car washer refining plant of employing photocatalysis oxidation technique as claimed in claim 1 is characterized in that: be provided with a mechanical ball float in the described filtered water tank.
8. the wastewater from car washer refining plant of employing photocatalysis oxidation technique as claimed in claim 1, it is characterized in that: the pipeline of described ejector and described photocatalytic oxidation device is provided with an intake ducting, and described intake ducting is provided with a valve.
9. the wastewater from car washer refining plant of employing photocatalysis oxidation technique as claimed in claim 1, it is characterized in that: described waste water container has a preliminary sedimentation tank, second pond and transition pond to constitute, be provided with first connecting tube between described preliminary sedimentation tank and the described second pond, be provided with one second connecting tube between described second pond and the described transition pond.
10. the wastewater from car washer refining plant of employing photocatalysis oxidation technique as claimed in claim 9 is characterized in that: be provided with a liquidometer in the described transition pond.
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| CN200910053559XA CN101928057A (en) | 2009-06-22 | 2009-06-22 | Car washing wastewater purifying device adopting photocatalytic oxidation technology |
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| CN200910053559XA CN101928057A (en) | 2009-06-22 | 2009-06-22 | Car washing wastewater purifying device adopting photocatalytic oxidation technology |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102653419A (en) * | 2012-04-25 | 2012-09-05 | 上海交通大学 | Device for treating fish culturing waste water by means of pore plate jet flow reinforcement TiO2 thin film photocatalysis |
| CN104261510A (en) * | 2014-08-26 | 2015-01-07 | 江苏恒智纳米科技有限公司 | Photocatalytic device for deeply processing organic wastewater |
| CN108840494A (en) * | 2018-08-24 | 2018-11-20 | 辽宁工业大学 | A kind of P25 titanium dioxide energy-conserving photoelectric catalytic oxidation water purifying device |
| CN108862540A (en) * | 2018-07-10 | 2018-11-23 | 春笋新科技(深圳)有限公司 | A kind of intelligent solar car carwash recirculating water purification system |
| CN109809594A (en) * | 2019-03-27 | 2019-05-28 | 天津友爱环保科技有限公司 | A kind of wastewater from car washer light catalytic treatment method and processing mechanism |
| CN110372138A (en) * | 2019-08-26 | 2019-10-25 | 青岛四机设备工程有限公司 | A kind of recycling processing method cleaning train sewage |
-
2009
- 2009-06-22 CN CN200910053559XA patent/CN101928057A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102653419A (en) * | 2012-04-25 | 2012-09-05 | 上海交通大学 | Device for treating fish culturing waste water by means of pore plate jet flow reinforcement TiO2 thin film photocatalysis |
| CN104261510A (en) * | 2014-08-26 | 2015-01-07 | 江苏恒智纳米科技有限公司 | Photocatalytic device for deeply processing organic wastewater |
| CN104261510B (en) * | 2014-08-26 | 2016-08-24 | 江苏恒智纳米科技有限公司 | The photocatalysis apparatus of deep-treating organic waste water |
| CN108862540A (en) * | 2018-07-10 | 2018-11-23 | 春笋新科技(深圳)有限公司 | A kind of intelligent solar car carwash recirculating water purification system |
| CN108840494A (en) * | 2018-08-24 | 2018-11-20 | 辽宁工业大学 | A kind of P25 titanium dioxide energy-conserving photoelectric catalytic oxidation water purifying device |
| CN109809594A (en) * | 2019-03-27 | 2019-05-28 | 天津友爱环保科技有限公司 | A kind of wastewater from car washer light catalytic treatment method and processing mechanism |
| CN110372138A (en) * | 2019-08-26 | 2019-10-25 | 青岛四机设备工程有限公司 | A kind of recycling processing method cleaning train sewage |
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Application publication date: 20101229 |