CN1533987A - Device and method of photocatalysis water treatment - Google Patents
Device and method of photocatalysis water treatment Download PDFInfo
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- CN1533987A CN1533987A CNA031090370A CN03109037A CN1533987A CN 1533987 A CN1533987 A CN 1533987A CN A031090370 A CNA031090370 A CN A031090370A CN 03109037 A CN03109037 A CN 03109037A CN 1533987 A CN1533987 A CN 1533987A
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- water
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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
Abstract
A photocatalyzing equipment for treating water is composed of a photocatalytic reaction trough with water inlet and outlet, a light irradiating unit above said reaction trough, and the filtering material carrying photocatalyst arranged in said reaction trough. When raw water flows through the trough, the heavy metal ions, organic pollutant, odor and bacteria are removed from it.
Description
Technical field
The invention belongs to water treatment field, particularly the device and method of photocatalysis treatment water.
Background technology
Along with developing rapidly of industry, water resources is subjected to serious day by day pollution, and toxic and harmful substance has become the important process in the environmental protection field in the removing water body.Traditional water pollution control method exists that energy consumption is big, secondary pollution and the shortcoming such as incomplete of degrading, and photocatalysis technology can be these problems solution preferably is provided.Photocatalysis technology has the superiority that other method hardly matches solving on the problem of environmental pollution.The photocatalytic degradation technology that with the semi-conductor is catalyzer just can be carried out under normal temperature, normal pressure, can thoroughly destroy organic pollutant and inorganic pollutant, and to make it complete oxidation be CO
2, H
2Innoxious substances such as O can also be reduced into simple substance with the heavy metal ion in the water body.Photocatalysis technology can environment purification, avoids secondary pollution, and is simple to operate, is the friendly type improvement of a kind of ideal environment technology.
So-called photocatalysis technology, be exactly that under the irradiation of certain wavelength light the valence band electron excitation of semiconductor material to be produced light induced electron-hole to conduction band right, this light induced electron-hole is to having stronger redox ability, majority of organic pollutants in the oxidable water body, can the oxide-semiconductor material surface OH of absorption
-, H
2The O molecule generates the free radical activity material with extremely strong oxidation capacity, can with the micro-content organism in the water progressively oxygenolysis be CO
2And H
2O.Under the irradiation of light, be called photocatalysis technology based on the technology of this oxygenolysis principle.This technology has the irreplaceable advance of traditional water treatment technology, and therefore non-secondary pollution and extensive applicability are considered to the most promising a kind of water treatment new and high technology.In the presence of light and oxygen or water degradable nearly all attached to the various organism on conductor oxidate surface such as hydride, oxynitride, sulfide, muriate, the electronics that is produced can the reducing heavy metal ion, and semiconductor light-catalyst also has many-sided functions such as deodorizing, anticorrosion and sterilization.Especially demonstrate huge application potential at aspects such as the advanced treatment of tap water and room air and sterilizations in air and water purification.In the application of photocatalyst, on the one hand, in order to improve the activity of excited state electron-hole pair, thereby improve catalytic activity, need high energy gap, just need absorption band " orchid moves ".In order to improve the utilization ratio of sunlight (fluorescence), require absorption band " red shift " again on the other hand.This a pair of contradiction has restricted the increased activity of conductor oxidate photocatalytic always, also is unpractical for many years fundamental contradiction place.But along with the development of nanosecond science and technology, conductor oxidate energy gap under nanoscale is met, from solved the problem of semiconductor oxide catalyst increased activity at all.Nano-photocatalyst has high-specific surface area and surface energy, and active site is many, its photocatalytic activity height.
The application of early stage photocatalyst, mainly be the powder catalyzer to be put in the aqueous solution that desire handles carry out Pollution abatement, though the work of this respect has obtained certain effect, but because of its powder very thin, reclaim difficulty, cause the catalyzer waste, and increased treatment cost, cause it that certain difficulty is arranged in practical application.In recent years, people have turned to research emphasis the high efficiency semi-conductor catalytic film of preparation to replace its powder, to solve the solid-liquid separation problem.Aspect the film forming (coating) of catalyzer, require its film (coating) to have certain stability and maintenance advantages of high catalytic activity, like this, just can reach good result of use.After having solved film forming (coating) problem, the application of photocatalysis technology mainly just is decided by corresponding device thereof and technology.
Summary of the invention
One of purpose of the present invention provides the device of photocatalysis treatment water, this device uses a kind of simple photocatalytic reaction tank, being provided with appendix in the groove has the material for flow of photocatalyst layer, be provided with light irradiation device simultaneously, under the irradiation of light, the current that desire is handled just make water obtain processing through the material for flow in the groove; Reach the purpose of low-cost processes sewage, especially can reach irreplaceable treatment effect aspect the deep purifying of similar tap water and the sterilization.
Another object of the present invention provides the method for utilizing photocatalysis treatment water device treating water of the present invention.
The present invention is the semiconductor catalyst that utilizes high catalytic activity, and prepared on the base material after preferably on good catalyst coat (its coating has certain stability and the keeps advantages of high catalytic activity) basis, carry out the photochemical catalysis practical technique that applied research obtains.
The device of photocatalysis treatment water of the present invention, comprise that photocatalytic reaction tank 1, light irradiation device 2, appendix have the material for flow 3 of photocatalyst, it is characterized in that: in described photocatalytic reaction tank 1, be provided with the material for flow 3 that appendix has photocatalyst layer, above photocatalytic reaction tank 1, be provided with light irradiation device 2, be respectively equipped with water-in 4 and water outlet 5 on the both sides of photocatalytic reaction tank 1.
Described photocatalyst is titanium oxide and mixture or zinc oxide and mixture thereof etc.
Described photocatalytic reaction tank 1 is to be welded by steel sheet.
Described material for flow 3 comprises porous ceramics, wire netting (as woven wire), glass fiber bundle or cloth etc.
The material for flow 3 that uses can be regular shape or non-regular shape, as rectangular parallelepiped or Cylinder etc.Shape and to put principle be to make current with stable and the big as far as possible amount material for flow of flowing through.Material for flow 3 is immersed in the interior water body of reactive tank, and the current height of the upper surface of material for flow 3 is 0.2～1.0cm.
Water treatment device of the present invention, the photocatalyst of 3 appendix of its material for flow is a semiconductor catalyst, and semiconductor catalyst comprises titanium oxide, be doped with the titanium oxide of precious metal ion, be doped with mixture, zinc oxide, zinc oxide composites or the sulfide etc. of anionic titanium oxide, titanium oxide.
Described metal ion such as iron ion, described negatively charged ion such as nitrogen element, described sulfide such as zinc sulphide or Cadmium Sulfide etc.
Employed appendix technology can reach photocatalytic coating and combine firmly with base material, and this coating can keep or improve its photocatalytic activity.
The method of device treating water of the present invention is under the irradiation of light, and the current that desire is handled just make water obtain processing through the material for flow in the groove.
Light irradiation device in the water treatment device, employed light source are the short-wave band and/or the UV-light of visible light, and wavelength is a UV-light preferably, and daylight also has certain effect.The optical source wavelength scope is 320～400nm preferably, and its intensity of illumination is 30～180 μ W/cm
2This light irradiation device comprises lamp bracket, fluorescent tube and its control device.Water surface distance is 3.0～8.0cm in the light source of light irradiation device and the reactive tank.Lamp bracket and reactive tank are provided with bayonet socket, engage easily, and can avoid outside the light ejecting device.
Device of the present invention is simple, has the oxygenolysis organic pollutant, the reducing heavy metal ion, and deodorizing, anticorrosion, many-sided function such as sterilization especially can reach irreplaceable treatment effect aspect the deep purifying of similar tap water and the sterilization.
Description of drawings
Fig. 1 device schematic side view of using porous ceramics as the material for flow treating water of the present invention.
Fig. 2 device schematic side view of using stainless (steel) wire as the material for flow treating water of the present invention.
Fig. 3 device schematic side view of using glass fiber bundle as the material for flow treating water of the present invention.
Fig. 4 is of the present invention to use porous ceramics to be the device of the material for flow treating water reactive tank schematic side view with parallel connection or series system operation.
Fig. 53 material for flow assemblies of the present invention are with the reactive tank schematic top plan view of parallel way operation.
Fig. 63 material for flow assemblies of the present invention are with the reactive tank schematic top plan view of series system operation.
Reference numeral:
1. reactive tank 2. light irradiation devices 3. material for flow 4. water inlets
5. water outlet 6. distributing troughs 7. water-distributing gaps 8. inlets
9. water leg 10. water tanks 11. submersible pumps 12. water dispensing boards
13. cutoff board 14. water collection sheets 15. are crossed head piece
Embodiment
Below in conjunction with embodiment and accompanying drawing technical scheme of the present invention is further described, cited embodiment is not to be limited embodiment.
Porous ceramic plate with cleaning is made into needed shape earlier, as rectangular parallelepiped.After the film forming (as sol-gel dip-coating film forming), be called material for flow 3, several material for flow 3 are positioned over the reactive tank 1 interior (referring to accompanying drawing 1) of 38cm * 9cm * 2cm with equidistant (thickness of ceramic plate equals the thickness in space) vertical also hanging down as for directions such as stream of water body.Above reactive tank, be provided with light irradiation device 2, the ultraviolet lamp that this installs employed light source predominant wavelength is 253.7nm, power are 25W, light intensity is 70 μ W/cm
2The distance of the material for flow 3 of fluorescent tube bottom margin in reactive tank 1 is 7.0cm.To contain methylene blue concentration is 5 * 10
-3The aqueous solution 50L of mmol/L sends in the reactive tank 1 through water inlet 4 with the flow of 8～10L/min with submersible pump, adjusts discharge control elevation of water surface, makes the moisture film that evenly flows through thick about 0.5～1.0cm on the upper surface of the material for flow of neatly putting 3.The water body that desire is handled is flowed through after the material for flow 3, flows back to the water tank that is placed with submersible pump in water outlet 5 in the mode of gravity flow.Like this, under the irradiation of UV-light, after 60 hours, the concentration of the methylene blue in the water body is reduced to 0.025 * 10 to cycling stream through reactive tank
-3Mmol/L, organic clearance are 99.5%.This device operation one month, no algal grown in the water tank does not have any peculiar smell.
There is the woven wire (200 order) of photocatalyst to be cut into 9cm * 2cm net piece appendix, vertical and closely overlay perpendicular to the water body flow direction in the reactive tank 1 of 38cm * 9cm * 2cm (seeing accompanying drawing 2).Other is with embodiment 1.Material for flow 3 is under the irradiation of light irradiation device 2, and this device operation is after 60 hours, and the concentration of the methylene blue in the water body is reduced to 0.107 * 10
-3Mmol/L, organic clearance are 97.9%.This device operation one month, no algal grown in the water tank does not have any peculiar smell.
The glass fibre that appendix is had a photocatalyst is according to axially being deposited in the reactive tank 1 of 38cm * 9cm * 2cm (seeing accompanying drawing 3) along the flow direction of water body.Other is with embodiment 1.Material for flow 3 is under the irradiation of light irradiation device 2, and this device operation is after 60 hours, and the concentration of the methylene blue in the water body is reduced to 0.084 * 10
-3Mmol/L, organic clearance are 98.3%.This device operation one month, no algal grown in the water tank does not have any peculiar smell.
Porous ceramic plate with cleaning is made into needed shape earlier, as rectangular parallelepiped.After the film forming (as sol-gel dip-coating film forming), be called material for flow 3.Material for flow 3 is positioned in the reactive tank 1 of 38cm * 9cm * 2cm.Above reactive tank, be provided with light irradiation device 2, the ultraviolet lamp that this installs employed light source predominant wavelength is 253.7nm, power are 25W, light intensity is 98 μ W/cm
2The distance of the material for flow 3 of fluorescent tube bottom margin in reactive tank 1 is 7.0cm.In order to improve processing power, use three assemblies to be installed in parallel operation (seeing accompanying drawing 4, accompanying drawing 5).To contain methylene blue concentration is 5 * 10
-3The aqueous solution 50L of mmol/L sends in the distributing trough 6 with the flow of 25～30L/min with submersible pump 11, water body in the distributing trough 6 water-distributing gap 7 of flowing through under the distribution of water dispensing board 12 enters reactive tank 1, material for flow 3 is under the irradiation of light irradiation device 2, the water body that desire is handled carries out catalyzed reaction when flowing through material for flow 3, makes water obtain handling.Regulate discharge control elevation of water surface, make the moisture film that evenly flows through thick about 0.5～1.0cm on the upper surface of material for flow 3.The reacted water body inlet 8 of flowing through under the guiding of water collection sheet 14 enters water leg 9, flows back in the water tank 10 that is placed with submersible pump 11 through the mode of water outlet 5 with gravity flow again.Like this, under the irradiation of UV-light, after 18 hours, the concentration of the methylene blue in the water body is reduced to 0.022 * 10 to cycling stream through reactive tank
-3Mmol/L, organic clearance are 99.6%.This installs run duration, and no algal grown in the water tank does not have any peculiar smell.
Porous ceramic plate with cleaning is made into needed shape earlier, as rectangular parallelepiped.After the film forming (as sol-gel dip-coating film forming), be called material for flow 3.Material for flow 3 is positioned in the reactive tank 1 of 38cm * 9cm * 2cm.Above reactive tank 1, be provided with light irradiation device 2, the ultraviolet lamp that this installs employed light source predominant wavelength is 253.7nm, power are 25W, light intensity is 120 μ W/cm
2The distance of the material for flow 3 of fluorescent tube bottom margin in reactive tank 1 is 7.0cm.In order to improve the processing degree of depth of water, use three assembly series connection installation and operations (seeing accompanying drawing 4, accompanying drawing 6).To contain methylene blue concentration is 5 * 10
-3The aqueous solution 50L of mmol/L sends into water body in the distributing trough 6 with the flow of 8～10L/min with submersible pump 11, water body in the distributing trough 6 water-distributing gap 7 of flowing through under the distribution of water dispensing board 12 enters reactive tank 1, is provided with cutoff board 13 in the reactive tank and crosses head piece 15 to guide water (flow) direction.Under the irradiation of light irradiation device 2, the water body that desire is handled carries out catalyzed reaction when flowing through material for flow 3, makes water obtain handling.Regulate discharge control elevation of water surface, make the moisture film that evenly flows through thick about 0.5-1.0cm on the upper surface of material for flow 3.The reacted water body inlet 8 of flowing through under the guiding of water collection sheet 14 enters water leg 9, flows back to the water tank 1 that is placed with submersible pump 11 through water outlet 5 in the mode of gravity flow again.Like this, under the irradiation of UV-light, after 18 hours, the concentration of the methylene blue in the water body is reduced to 0.019 * 10 to cycling stream through reactive tank
-3Mmol/L, organic clearance are 99.6%.This installs run duration, and no algal grown in the water tank does not have any peculiar smell.
Claims (8)
1. the device of a photocatalysis treatment water, comprise that photocatalytic reaction tank (1), light irradiation device (2), appendix have the material for flow (3) of photocatalyst, it is characterized in that: being provided with appendix in described photocatalytic reaction tank (1) has the material for flow of photocatalyst layer (3), be provided with light irradiation device (2) in the top of photocatalytic reaction tank (1), be respectively equipped with water-in (4) and water outlet (5) on the both sides of photocatalytic reaction tank (1).
2. device as claimed in claim 1 is characterized in that: described material for flow comprises porous ceramics, wire netting, glass fiber bundle or cloth.
3. device as claimed in claim 1 is characterized in that: described photocatalyst comprises titanium oxide, be doped with the titanium oxide of metal ion, be doped with mixture, zinc oxide, zinc oxide composites or the sulfide of anionic titanium oxide, titanium oxide.
4. device as claimed in claim 3 is characterized in that: described metal ion is an iron ion, and described negatively charged ion is the nitrogen element, and described sulfide is zinc sulphide or Cadmium Sulfide.
5. device as claimed in claim 1 is characterized in that: described photocatalytic reaction tank (1) can be carried out parallel connection or series connection as a unit.
6. method of utilizing any described device treating water of claim 1-5, it is characterized in that: under the irradiation of light, the current that desire is handled just make water obtain processing through the material for flow in the groove, the processing condition of its treating water are that employed light source is a UV-light, the optical source wavelength scope is 320～400nm, and its intensity of illumination is 30～180 μ W/cm
2
7. method as claimed in claim 6 is characterized in that: water surface distance is 3.0～8.0cm in the light source of described light irradiation device and the reactive tank.
8. method as claimed in claim 6 is characterized in that: described material for flow is immersed in the interior water body of reactive tank, and the current height of the upper surface of material for flow is 0.2～1.0cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031090370A CN1533987A (en) | 2003-04-02 | 2003-04-02 | Device and method of photocatalysis water treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031090370A CN1533987A (en) | 2003-04-02 | 2003-04-02 | Device and method of photocatalysis water treatment |
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| Publication Number | Publication Date |
|---|---|
| CN1533987A true CN1533987A (en) | 2004-10-06 |
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|---|---|---|---|
| CNA031090370A Pending CN1533987A (en) | 2003-04-02 | 2003-04-02 | Device and method of photocatalysis water treatment |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102020333A (en) * | 2010-11-26 | 2011-04-20 | 中国科学院化学研究所 | Multistage continuous photocatalysis water purification reactor and water treatment method thereof |
| CN102491484A (en) * | 2011-11-22 | 2012-06-13 | 河海大学 | Application of photocatalyst of TiO2 (titanium dioxide) loaded on glass fiber fabric to treating microcystin |
| CN102531095A (en) * | 2010-12-14 | 2012-07-04 | 佳龙科技工程股份有限公司 | Method for removing heavy metal in waste liquid |
| CN103159288A (en) * | 2013-04-08 | 2013-06-19 | 长春理工大学 | Photo-catalytic reactor for degrading organic substance |
| CN107983307A (en) * | 2017-12-03 | 2018-05-04 | 凯思普科技有限责任公司 | A kind of efficiently water purification nano-graphene material |
| CN108002481A (en) * | 2017-12-20 | 2018-05-08 | 北京为康环保科技有限公司 | A kind of water treating module |
| CN110127914A (en) * | 2019-05-21 | 2019-08-16 | 东南大学 | A kind of wastewater treatment equipment and its application method based on three-dimensional zinc oxide |
-
2003
- 2003-04-02 CN CNA031090370A patent/CN1533987A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102020333A (en) * | 2010-11-26 | 2011-04-20 | 中国科学院化学研究所 | Multistage continuous photocatalysis water purification reactor and water treatment method thereof |
| CN102531095A (en) * | 2010-12-14 | 2012-07-04 | 佳龙科技工程股份有限公司 | Method for removing heavy metal in waste liquid |
| CN102491484A (en) * | 2011-11-22 | 2012-06-13 | 河海大学 | Application of photocatalyst of TiO2 (titanium dioxide) loaded on glass fiber fabric to treating microcystin |
| CN103159288A (en) * | 2013-04-08 | 2013-06-19 | 长春理工大学 | Photo-catalytic reactor for degrading organic substance |
| CN107983307A (en) * | 2017-12-03 | 2018-05-04 | 凯思普科技有限责任公司 | A kind of efficiently water purification nano-graphene material |
| CN108002481A (en) * | 2017-12-20 | 2018-05-08 | 北京为康环保科技有限公司 | A kind of water treating module |
| CN110127914A (en) * | 2019-05-21 | 2019-08-16 | 东南大学 | A kind of wastewater treatment equipment and its application method based on three-dimensional zinc oxide |
| CN110127914B (en) * | 2019-05-21 | 2022-03-25 | 东南大学 | Wastewater treatment device based on three-dimensional zinc oxide and use method thereof |
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