CN102583639A - Water treatment device and method reinforcing photocatalysis mass transfer - Google Patents
Water treatment device and method reinforcing photocatalysis mass transfer Download PDFInfo
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- CN102583639A CN102583639A CN2012100299315A CN201210029931A CN102583639A CN 102583639 A CN102583639 A CN 102583639A CN 2012100299315 A CN2012100299315 A CN 2012100299315A CN 201210029931 A CN201210029931 A CN 201210029931A CN 102583639 A CN102583639 A CN 102583639A
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Abstract
The invention discloses a water treatment device and method reinforcing photocatalysis mass transfer. The device comprises a liquid storage tank, a vortex pump, a cavitation generator and a plurality of excitation light sources, wherein the liquid storage tank is connected with the vortex pump, the vortex pump is connected with the cavitation generator, a control valve is arranged between the vortex pump and the cavitation generator, and the cavitation generator and the excitation light sources are all arranged in the liquid storage tank. The method comprises: adding waste water and a photocatalyst into the liquid storage tank until the waste water immerses the cavitation generator and the excitation light sources; adjusting the control valve to control inlet pressure of the cavitation generator; starting the vortex pump to enable the waste water to flow through the cavitation generator at a high speed and form jet flow; and starting the excitation light sources to shine the jet flow and surrounding water bodies. A water power backflow device is utilized to generate cavitation, the photocatalyst can be disaggregated, the surfaces of the light sources and the surface of the photocatalyst are continuously flushed so as to remove attached pollutants and degrade products, the solution mass transfer is reinforced, and the degradation efficiency of organics is effectively improved.
Description
Technical field
The present invention relates to water-treatment technology field, particularly a kind of water treatment device and method of strengthening the photochemical catalysis mass transfer.
Background technology
Along with industrial deeply development, the kind and the quantity discharged of trade effluent increase to some extent, and composition is also complicated more, and environment and human health are caused great harm.The organism in adopting the biotechnology degradation water, a series of high-level oxidation technologies also become the research focus of whole world water treatment field gradually, and by broad research.
Photocatalysis technology is handled waste water as a kind of high-level oxidation technology, has the reaction conditions gentleness, and is easy and simple to handle, reduce advantage such as secondary pollution and come into one's own day by day, has vast potential for future development.Yet the mass transfer of solution, the degradation product midbody all can make the catalytic activity of catalyzer constantly reduce to influence of catalyst surface etc., and these have all hindered large-scale promotion and the application of photocatalysis technology in actual industrial waste water.
For improving the light utilization efficiency of catalyzer; C.H. Wu is incorporated into ultrasonic technology in the light-catalyzed reaction system; Find that ultrasonic cavitation can effectively improve photocatalytic degradation efficient (the Journal of Hazardous Materials 2008,153 (3): 1254-1261) of pollutent.Hyperacoustic strengthening effect is because the cavitation phenomenon that UW produces in liquid phase nucleation, the process of growing and crumble and fall of cavity promptly takes place in the order of magnitude of microsecond, and in the zonule, discharges lot of energy.Therefore, cavitation phenomenon is equivalent to the energy of this diversity of sound wave is accumulated small " focus ", and each " focus " all can become a microreactor.Crumble and fall moment at cavity, the inner extreme condition that produces of cavity can make water molecules generation pyrolysis, generates hydroxyl radical free radical, thus the organic pollutant in the oxidative degradation waste water.Cavitation phenomenon also has high-octane physical influence, as strengthen the solution mass transfer, make brittle solid cracked, upgrade solid surface etc.Yet; The cavitation that UW the causes cavitation activity that in large-scale water treatment system, can not distribute effectively; Vltrasonic device is expensive, and the efficient that electroacoustic transforms in the entering solution is very low, thereby the ultrasonic cavitation technology receives very big restriction in the industrial applications of reality.
Summary of the invention
First purpose of the present invention is to provide a kind of water treatment device of strengthening the photochemical catalysis mass transfer, can't effectively solve the problem that intermediate has a strong impact on catalyst surface active to solve existing water treatment device.
Second purpose of the present invention is to provide a kind of water treatment method that utilizes the water treatment device of above-mentioned reinforcement photochemical catalysis mass transfer, can't effectively solve the problem that intermediate has a strong impact on catalyst surface active to solve existing water treatment method.
Technical scheme of the present invention is following:
A kind of water treatment device of strengthening the photochemical catalysis mass transfer; Comprise: liquid storage tank and some excitation light sources; Said excitation light source is located in the said liquid storage tank, also comprises Vortex pump and cavitation producer, and said Vortex pump inlet is connected with liquid storage tank; The Vortex pump outlet is connected with the cavitation producer, and said cavitation producer stretches in the said liquid storage tank;
Be provided with first valve between said Vortex pump and the said cavitation producer.
Preferably, also comprise arm, said arm stretch in the said liquid storage tank and with the parallelly connected setting of said cavitation producer;
Said arm is provided with second valve.
Preferably, said cavitation producer is also connected and is provided with pressure-detecting device.
Preferably, said excitation light source and said cavitation producer laterally arrange, and said excitation light source is that the axle center is symmetrically distributed with the cavitation producer in liquid storage tank.
Preferably, described cavitation producer is selected from a kind of in venturi tube and the porous plate.
Preferably, described excitation light source is selected from uv lamp at least a that visible light and the outside are arranged with quartz socket tube.
Preferably, said liquid storage tank inwall is provided with and is used for catoptrical member.
A kind of water treatment method that utilizes the water treatment device of the said reinforcement photochemical catalysis of above-mentioned arbitrary claim mass transfer comprises waste water and photocatalyst particulate are added in the liquid storage tank and open excitation light source, it is characterized in that, and is further comprising the steps of:
Add said waste water to submergence cavitation producer and excitation light source;
Regulate said valve, the control waste water solution is in the inlet pressure at cavitation producer place;
Start Vortex pump, make the waste water high speed flow, form jet through the cavitation producer;
The excitation light source of said unlatching to the jet in the cavitation producer and on every side water body shine.
Preferably, regulating said valve comprises and regulates first valve be located between said Vortex pump and the cavitation producer and second valve of being located at said arm.
Preferably, the said reaction times, the dosage of said photocatalyst was not more than 5g/L in 2 hours, and the inlet pressure of said cavitation producer is more than 0.3MPa, and the peak flow rate of said waste water solution in the cavitation producer is not less than 20 meter per seconds.
Compared with prior art, beneficial effect of the present invention is following:
The cavitation that the one, the present invention utilizes the waterpower reflux to produce has deaggregation to the photocatalyst particulate in the waste water, and catalyst surface is brought in constant renewal in, and keeps high catalytic activity, thereby has improved light utilization efficiency and catalytic efficiency (.The exchange of having accelerated material between light source surface and the solution main body that circulates of waste water is simultaneously upgraded, and has strengthened mass transfer, has improved degradation efficiency;
The 2nd, compares with traditional photo catalysis reactor (the catalyst particles suspension solution that the excitation light source irradiation is left standstill), and waterpower of the present invention is strengthened the water treatment device and the method for photochemical catalysis mass transfer can more efficiently and practice thrift the photocatalyst consumption;
The 3rd. compare with the apparatus and method of photochemical catalysis combination treatment organic waste water with ultrasonic cavitation, present device is simple, easy handling and maintenance, cost is lower, efficiency is higher, and is more suitable for large-scale application.
Description of drawings
Fig. 1 a, Fig. 1 b are the structural representations of the embodiment of the invention 1 water treatment device, and wherein, Fig. 1 a is the embodiment of the invention 1 a device side view; Fig. 1 b is Fig. 1 a dotted line place sectional top view;
Fig. 2 is the structural representation of the porous plate of the embodiment of the invention 2.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be appreciated that these embodiment only are used to explain the present invention, and are not used in qualification protection scope of the present invention.
Shown in Fig. 1, the water treatment device that present embodiment adopts comprises liquid storage tank 1, Vortex pump 4, cavitation producer 8 and four excitation light sources 10, wherein; Liquid storage tank 1 bottom is connected with Vortex pump 4 inlets through pipeline, and first valve 5 is installed in Vortex pump 4 exits, and the pipeline fork is divided into the person in charge and the arm of parallel connection setting and stretches into respectively in the liquid storage tank 1 afterwards; Setting pressure proofing unit on the person in charge; Applying pressure table 7 is installed second valve 6 on the arm here, stretches into the terminal cavitation producer 8 of installing of person in charge's part of liquid storage tank 1; Four excitation light sources 10 and the 8 parallel placements of cavitation producer, and in liquid storage tank 1, be that the axle center is symmetrically distributed with the cavitation producer; In addition, liquid storage tank inside also is provided with and is used for catoptrical member, is reflective aluminium foil 2 here.During practical implementation; The setting of liquid storage tank, Vortex pump, cavitation producer, valve and pressure-detecting device and mode of connection also can have a lot of distortion in the said water treatment device; Said pressure-detecting device and catoptrical member also can have a lot of selections; The quantity of excitation light source also can change, and is merely for example here, and the present invention does not limit this.
The used cavitation producer 8 of present embodiment is selected venturi tube for use, and said venturi tube comprises expansion segment, trunnion portion and the section of dwindling successively, its expansion and to dwindle angle be 20 degree, and the diameter ratio of trunnion and venturi tube is 1:14.During practical implementation, also can select other type cavitation producer for use, the parameter of said venturi tube also can have a lot of distortion, is merely for example here, and the present invention does not limit this.
This device is realized water treatment through following steps: in waste water, add the photocatalyst particulate and obtain wastewater treatment liquid 3; Then this wastewater treatment liquid 3 is injected liquid storage tank 1; To treatment solution 3 submergence cavitation producers 8 and excitation light source 10; Adjusting control valve 5 and 6 is to obtain suitable discharge and cavitation generator inlet pressure; Start Vortex pump 4, make the waste water high speed flow, form jet through cavitation producer 8; Open excitation light source 10, to the jet in the cavitation producer 8 and on every side water body shine, promptly begin water treatment procedure.During practical implementation, the concrete steps of above-mentioned water treatment and working order also can be regulated, and the present invention does not limit this.
Implementation condition and result that present embodiment is concrete are following:
Process object is reactive brilliant red x-3b (pH 6.7) dye wastewater of 100mg/L.Wastewater volume is 4.0 L.Photocatalyst is selected TiO for use
2, its dosage is respectively 0.025,0.1,0.2,0.5,2.0,5.0g/L, and during practical implementation, photocatalyst also can be selected other type light catalyzer, and its dosage also can have other multiple choices, and the present invention does not limit this; Excitation light source 10 is the uv lamp of 4 9W 254nm, and each uv lamp outside all is with quartz socket tube 9, and be the axle center symmetrical distribution with cavitation producer 8; Adjusting control valve 5 and 6, the inlet pressure that makes cavitation producer 8 is 0.4 MPa, the Peak Flow Rate in this moment cavitation producer 8, promptly the water flow velocity at trunnion place is 43.6 meter per seconds; Sampling analysis after 30 minutes is measured the absorbancy of reactive brilliant red x-3b at 538nm place, asks chroma removal rate (%), and the photocatalysis treatment comparison of shining the catalyst particles suspension solution that leaves standstill with traditional excitation light source, calculates both ratio.The result is as shown in table 1:
Table 1
Can know that by above result the method for embodiment of the invention dye wastewater treatment using when adding the low dosage photocatalyst more has superiority than traditional light-catalyzed reaction.In addition, this shows that also the application of the inventive method can reduce the catalyst amounts of traditional light-catalyzed reaction, in large-scale application, can reduce the input cost of catalyzer, reduces the loss of catalyzer.
Embodiment 2
The reaction unit that present embodiment adopts is identical with embodiment 1 with implementation process.
The cavitation producer of present embodiment adopts the porous plate that is provided with plate hole 11, and wherein the plate hole aperture is 1mm, and the plate hole number is 13, like Fig. 2.During practical implementation, the plate hole aperture and the plate hole number of said porous plate also can have a lot of distortion, are merely for example here, and the present invention does not limit this.
The concrete implementation condition of present embodiment also comprises: process object is reactive brilliant red x-3b (pH 6.7) dye wastewater of 50mg/L.Wastewater volume is 4.0L.Employed photocatalyst is the TiO of 0.1g/L
2Particulate; Excitation light source 10 adopts the uv lamp of 4 9W 254nm, and each uv lamp outside all is with quartz socket tube 9, and be the axle center symmetrical distribution with cavitation producer 8; First valve 5 is opened fully, and second valve 6 is closed fully, and the inlet pressure of cavitation producer 8 is 0.38MPa, the Peak Flow Rate in this moment cavitation producer 8, and promptly the water flow velocity at plate hole place is 20.7 meter per seconds; Sampling analysis after 30 minutes is measured the absorbancy of reactive brilliant red x-3b at the 538nm place, and calculates chroma removal rate.
Adopting the chroma removal rate of reactive brilliant red in the waste water that said apparatus and method obtain is 57.3%, explains that the present embodiment device and method can remove the organism in the waste water relatively effectively.
The reaction unit that present embodiment adopts is identical with embodiment 1 with implementation process.
The concrete implementation condition of present embodiment also comprises:
Process object is reactive brilliant red x-3b (pH 6.7) dye wastewater of 50mg/L.Wastewater volume is 4.0L.Used cavitation producer 8 is a venturi tube, its expansion and dwindle angle be 20 the degree, the diameter ratio of trunnion and venturi tube is 1:14; Photocatalyst is selected TiO for use
2Particulate, its dosage are 0.1g/L; Excitation light source 10 is the uv lamp of 4 9W 254nm, overcoat quartz socket tube 9, and be that the axle center is symmetrically distributed with cavitation producer 8; First valve 5 is opened fully, and second valve 6 is closed fully, and the inlet pressure of cavitation producer 8 is 0.7MPa, the Peak Flow Rate in this moment cavitation producer 8, and promptly the water flow velocity at trunnion place is 60.5 meter per seconds; Sampling analysis after 30 minutes is measured the absorbancy of reactive brilliant red x-3b at the 538nm place, asks chroma removal rate (%).
The chroma removal rate of reactive brilliant red is 90.7% in the present embodiment that calculates according to experimental result, explains that the present embodiment device and method can remove the organism in the waste water efficiently.
Embodiment 4
The reaction unit that present embodiment adopts is identical with embodiment 1 with implementation process.
The concrete implementation condition of present embodiment also comprises:
Process object is reactive brilliant red x-3b (pH 6.7) dye wastewater of 50mg/L.Wastewater volume is 4.0 L.Used cavitation producer 8 is a venturi tube, its expansion and dwindle angle be 20 the degree, the diameter ratio of trunnion and venturi tube is 1:14; Photocatalyst is 0.1 g/L TiO
2Particulate; Said excitation light source 10 adopts 6 9W 254nm uv lamps, and each uv lamp outside all is with quartz socket tube 9, and be the axle center symmetrical distribution with cavitation producer 8; Adjusting control valve 5 and 6, the inlet pressure that makes cavitation producer 8 is 0.4MPa, the Peak Flow Rate in this moment cavitation producer 8, promptly the water flow velocity at trunnion place is 43.6 meter per seconds; Sampling analysis after 60 minutes is measured the absorbancy of reactive brilliant red x-3b at the 538nm place, asks chroma removal rate.
The chroma removal rate of reactive brilliant red is 99.8% in the present embodiment that calculates according to experimental result, explains that the present embodiment device and method can efficiently remove the organism in the waste water.
Embodiment 5
The reaction unit that present embodiment adopts is identical with embodiment 1 with implementation process.
The concrete implementation condition of present embodiment also comprises:
Process object is respectively 100 mg/L reactive brilliant red x-3bs (pH 6.7), 100 mg/L rhodamine Bs (pH 5.0) and 100 mg/L direct orange s S (pH 5.0) dye wastewater.Wastewater volume respectively is 4.0 L.Used cavitation producer 8 is a venturi tube, its expansion and dwindle angle be 20 the degree, the diameter ratio of trunnion and venturi tube is 1:14; Photocatalyst adopts 0.1 g/L TiO
2Particulate; Excitation light source 10 is the uv lamp of 4 9W 254nm, overcoat quartz socket tube 9, and be that the axle center is symmetrically distributed with cavitation producer 8; Adjusting control valve 5 and 6, the inlet pressure that makes cavitation producer 8 is 0.4 MPa, the Peak Flow Rate in this moment cavitation producer 8, promptly the water flow velocity at trunnion place is 43.6 meter per seconds; Certain hour sampling analysis at interval, measure reactive brilliant red x-3b at 538nm, rhodamine B at 563nm and direct orange s S in the absorbancy at 496nm place, ask chroma removal rate (%).
The chroma removal rate result of reactive brilliant red x-3b, rhodamine B and direct orange s S is as shown in table 2 below:
Table 2
Can know by above result, use the present embodiment apparatus and method in time enough, to handle and to obtain very high catalyzed degradation efficient.
Comprehensive the foregoing description is visible, the apparatus and method of Hydrodynamic cavitation of the present invention and photochemical catalysis combination treatment organic waste water (is example with the waste water from dyestuff), the multiple dye wastewater of degradable; Compare with method with traditional photocatalysis apparatus, can effectively reduce the dosage of photocatalyst, in large-scale application, can reduce the input cost of catalyzer, have a good application prospect.
Claims (10)
1. water treatment device of strengthening the photochemical catalysis mass transfer; Comprise: liquid storage tank and some excitation light sources, said excitation light source is located in the said liquid storage tank, it is characterized in that; Also comprise Vortex pump and cavitation producer; Said Vortex pump inlet is connected with liquid storage tank, and the Vortex pump outlet is connected with the cavitation producer, and said cavitation producer stretches in the said liquid storage tank;
Be provided with first valve between said Vortex pump and the said cavitation producer.
2. water treatment device as claimed in claim 1 is characterized in that, also comprises arm, said arm stretch in the said liquid storage tank and with the parallelly connected setting of said cavitation producer;
Said arm is provided with second valve.
3. according to claim 1 or claim 2 water treatment device is characterized in that said cavitation producer is also connected and is provided with pressure-detecting device.
4. water treatment device as claimed in claim 1 is characterized in that, said excitation light source and said cavitation producer laterally arrange, and said excitation light source is that the axle center is symmetrically distributed with the cavitation producer in liquid storage tank.
5. water treatment device as claimed in claim 1 is characterized in that, described cavitation producer is selected from a kind of in venturi tube and the porous plate.
6. like claim 1 or 4 described water treatment device, it is characterized in that described excitation light source is selected from uv lamp at least a that visible light and the outside are arranged with quartz socket tube.
7. water treatment device as claimed in claim 1 is characterized in that, said liquid storage tank inwall is provided with and is used for catoptrical member.
8. water treatment method that utilizes the water treatment device of the said reinforcement photochemical catalysis of above-mentioned arbitrary claim mass transfer comprises waste water and photocatalyst particulate are added in the liquid storage tank and open excitation light source, it is characterized in that, and is further comprising the steps of:
Add said waste water to submergence cavitation producer and excitation light source;
Regulate said valve, the control waste water solution is in the inlet pressure at cavitation producer place;
Start Vortex pump, make the waste water high speed flow, form jet through the cavitation producer;
The excitation light source of said unlatching to the jet in the cavitation producer and on every side water body shine.
9. water treatment method as claimed in claim 8 is characterized in that, regulates said valve and comprises and regulate first valve be located between said Vortex pump and the cavitation producer and second valve of being located at said arm.
10. water treatment method as claimed in claim 8; It is characterized in that; The said reaction times is in 2 hours; The dosage of said photocatalyst is not more than 5g/L, and the inlet pressure of said cavitation producer is more than 0.3MPa, and the peak flow rate of said waste water solution in the cavitation producer is not less than 20 meter per seconds.
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Cited By (3)
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| CN110092462A (en) * | 2019-05-15 | 2019-08-06 | 辽宁大学 | A kind of method of Hydrodynamic cavitation catalytic degradation system and Hydrodynamic cavitation catalytic degradation waste water from dyestuff |
| CN111348718A (en) * | 2020-03-16 | 2020-06-30 | 辽宁大学 | Method for photocatalytic degradation of dye in wastewater by cooperation of hydrodynamic cavitation system and composite photocatalyst |
| CN111807498A (en) * | 2020-07-31 | 2020-10-23 | 山东大学 | Integrated antibiotic wastewater degradation device combining hydrodynamic cavitation and photocatalysis |
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| US20100090124A1 (en) * | 2003-08-22 | 2010-04-15 | Bijan Kazem | Method and Apparatus for Irradiating Fluids |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110092462A (en) * | 2019-05-15 | 2019-08-06 | 辽宁大学 | A kind of method of Hydrodynamic cavitation catalytic degradation system and Hydrodynamic cavitation catalytic degradation waste water from dyestuff |
| CN110092462B (en) * | 2019-05-15 | 2022-04-05 | 辽宁大学 | Hydrodynamic cavitation catalytic degradation system and method for catalyzing and degrading dye wastewater through hydrodynamic cavitation |
| CN111348718A (en) * | 2020-03-16 | 2020-06-30 | 辽宁大学 | Method for photocatalytic degradation of dye in wastewater by cooperation of hydrodynamic cavitation system and composite photocatalyst |
| CN111807498A (en) * | 2020-07-31 | 2020-10-23 | 山东大学 | Integrated antibiotic wastewater degradation device combining hydrodynamic cavitation and photocatalysis |
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Application publication date: 20120718 |