CN100532283C - Micro plasma arc discharging catalytic water treatment method - Google Patents
Micro plasma arc discharging catalytic water treatment method Download PDFInfo
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- CN100532283C CN100532283C CNB2006101342726A CN200610134272A CN100532283C CN 100532283 C CN100532283 C CN 100532283C CN B2006101342726 A CNB2006101342726 A CN B2006101342726A CN 200610134272 A CN200610134272 A CN 200610134272A CN 100532283 C CN100532283 C CN 100532283C
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Abstract
The present invention belongs to the field of environmental engineering waste-water treatment technology, and relates to a plasma arc discharge catalytic water treatment method. It is characterized by that said method makes the electrolyte be added into an aqueous solution to be treated according to a certain concentration requirement, and applies pulse direct-current voltage to said reaction system to make the electrode surface of positive electrode in-situ form load-type catalyst to make discharge catalysis so as to attain the goal of making organic waste water obtain degration treatment.
Description
Technical field
The invention belongs to the environmental engineering technical field of waste water processing, relate to discharge catalytic under the liquid.
Background technology
Discharge process can produce high-energy environment, contains a large amount of high energy active particles in the plasma body of generation, and many molecules are had destruction.These high energy active particles combine with catalyzer, can effectively improve the discharge process effect, promote organic molecule to decompose, thereby become pollution Processing Technology Research and hot of research and development.
High pressure pulse discharge and catalyzing cooperation are containing volatile organic matter, NO
XThe gas sweetening process field in existing extensive studies
[1-7]Yet it is less that discharge and catalyzer are worked in coordination with the research that is used for water treatment field under the liquid, and domestic and international research has: add FeSO in the high pressure pulse discharge water treatment system
4, H
2O
2, the nanometer iron oxide yellow
[8-11]Wait the purification effects of increasing water quality, the H that mainly utilizes itself and discharge to generate
2O
2Form similar Fenton reagent, under the synergy of plasma discharge spark, promote organic degraded.Li Jie etc.
[12]Proposed high-voltage pulse corona discharge and TiO
2Catalyzer utilizes discharge radiating ultraviolet excitation TiO in conjunction with technology
2Photocatalytic effect carries out water treatment, wherein TiO
2Be that suspended state is present in the water treatment system.
If with TiO
2Catalyst cupport is placed in or original position is created on and will more helps discharge on the discharge electrode with catalytic collaborative, and the discharge catalytic system on this liquid lower electrode is not appeared in the newspapers as yet.The discharge catalytic water technology of research, development of new liquid lower electrode surface is the purpose of this project.
Little plasma arc discharge technology is to utilize microplasma discharge in conductive soln, directly, finish the modification on antianode surface with this at electrochemistry, plasma chemistry and the thermochemical process growth in situ oxide ceramics rete of light metal surfaces such as aluminium, titanium, magnesium by complexity
[13,14], be the material surface modifying technology of materialogy field new development.
In the investigation to its discharge characteristic, this project inventor finds that this technology has and the incomparable advantage of other discharges, can form better TiO
2Catalytic environment.At first from discharge mode
[15], the microplasma technology has the characteristic of similar mediums barrier discharge, but what form is micro discharge channels, so it had both had the arc light feature, and high-energy is provided, but gentle, and about the low 200～600V of required crest voltage.Secondly, Ti is that minority can produce one of metal of microplasma discharge, is anode with it, and in acid electrolyte, it is the TiO of main crystal formation that its surface can form with anatase octahedrite
2Ceramic layer
[14]And TiO
2Under the certain energy field action, as UV-light, ultrasonic wave, electric field etc., can play katalysis via the generation of electron-hole pair, therefore, utilize TiO
2Katalysis is carried out water treatment and always is the research focus.And the TiO of microplasma technology preparation
2Ceramic layer also has been proved to be good photocatalytic activity
[16]
Summary of the invention
The present invention is directed to above-mentionedly, proposed a kind of micro plasma arc discharging catalytic water treatment method in view of above consideration.Utilize Ti to carry out microplasma discharge for anode, original position is formed with the ceramic layer of katalysis, and simultaneously simulative organic wastewater is handled, and works out a kind of microplasma discharge and catalytic synergy water treatment method.
Technical scheme of the present invention is, micro plasma arc discharging catalytic water treatment method, this method is that ionogen is joined in the pending aqueous solution with the finite concentration requirement, reaction system is applied pulsed dc voltage, make positive electrode extremely can carry out discharge catalytic by original position generation loaded catalyst in the surface, ionogen is H
3PO
4Or NaOH, its concentration range is respectively 0.01～1mol/L and 1～20g/L, and anode electrode is a titanium metal, or titanium alloy, or the titanium of silver-doped or iron or tungsten, and the yin, yang interelectrode distance is 2mm～1000mm, and the anode electrode surface-area that inserts in the liquid is 1～1000cm
2, crest voltage is 200～10000V, and frequency is 50Hz～50kHz, and dutycycle is 1/360～1/60, and aqueous temperature is 0～80 ℃, and the treatment time is 20 minutes～4 hours, and this method is divided into static treatment mode and dynamichandling mode, and concrete treatment step is:
1) static treatment mode: in pending liquid, add ionogen by described concentration range;
Dynamichandling mode: in pending liquid input tube road, inject ionogen by described concentration range adjustablely:
2) open ventilation system;
3) in reaction tank, insert electrode;
4) will be mixed with in the electrolytical pending liquid input reaction tank;
5) connect power supply, and boosted voltage is a stable discharging under 200～10000V magnitude of voltage at crest voltage gradually to the sparking voltage threshold value,
6) static treatment mode: the variation of timing sampling chemical examination water quality, by calculating treatmenting time in advance, and, determine to handle the concluding time in conjunction with the result who chemically examines;
The dynamichandling mode: analyze the water quality after the effusive processing of reaction tank, the result in conjunction with chemically examining regulates suitable flow, and treatment effect is met the demands;
When 7) processing finishes, reduce voltage to 10～20V gradually after, close power supply and ventilation system again; For the dynamichandling mode, before reducing voltage gradually, stop earlier importing pending liquid in reaction tank.
Described ionogen is Na
2CO
3, NaAlO
2, Na
2SO
4, Na
3PO
4In a kind of, its concentration range is respectively 1～30g/L, 1～30g/L, 2～20g/L, 10～60g/L.Described anode electrode is the titanium of titanium alloy, silver-doped or iron or tungsten.Anode electrode is shaped as needle-like or tabular.
The invention has the beneficial effects as follows that this discharge catalytic system has that synergy is good, the degradation treatment efficiency height of organic waste water, reactor design requires characteristics such as simple, is a kind of promising water treatment new technology.
Description of drawings
Fig. 1 is a structural representation of implementing apparatus of the present invention.
Among the figure, 1, the pulse power, 2, positive pole, 3, negative pole, 4, oscilloscope, 5, anode electrode, 6, cathode electrode, 7, electrolytic solution, 8, reaction tank.
Embodiment
As Fig. 1, the experimental installation of discharge catalytic water treatment comprises the pulse power and differential of the arc reaction tank two major parts, form by the pulse power 1, positive pole 2, negative pole 3, oscilloscope 4, anode electrode 5, cathode electrode 6, electrolytic solution 7 and reaction tank 8, the positive pole 2 of the pulse power 1 links to each other with anode electrode 5, negative pole 3 links to each other with cathode electrode 6, and anode electrode 5 and cathode electrode 6 insert and contain in the reaction tank 8 of electrolytic solution 7.Power supply is the special-purpose pure square wave spike pulse direct supply of differential of arc on metal surface oxidation that the Dalian Maritime University develops voluntarily, electric current 0 ~ the 20A of power supply, frequency 50 ~ 2000Hz and voltage 0 ~ 600V all can regulate, and the size of mean current is recently controlled by the duty of regulating impulse.The experimental voltage pulse-repetition is 300Hz, dutycycle 1:180.Anode electrode 5 areas are 25mm * 50mm, and cathode electrode 6 is a stainless steel plate, and area is 20mm * 40mm, and interelectrode distance is 10cm.Electrolytic solution is the 0.3mol/L phosphoric acid solution.Tropeolin-D preparation mimic waste water from dyestuff is adopted in this experiment, because this soluble azo dyes is the main object that dyeing waste water is handled, and contains phenyl ring, and the effect of handling such waste water with methods such as chemistry and biologies is all undesirable.The tropeolin-D starting point concentration is 20.0mg/L, and treatment capacity is 600mL.
The variation of record mean current and crest voltage in the experiment is measured DC pulse wave mode width with oscilloscope 4.With the variation that day island proper Tianjin ultraviolet-visible spectrophotometer JascoUV550 surveys the absorbancy at maximum absorption wavelength 510nm place in the waste water, with the decolorizing effect of reflection methyl orange solution, percent of decolourization η is the velocity of variation of absorbancy before and after handling.The UBS2000 UV, visible light fiber spectrometer test that the differential of the arc that discharge is sent on the electrode is produced by ocean optics.
Claims (3)
1, micro plasma arc discharging catalytic water treatment method, it is characterized in that, this method is that ionogen is joined in the pending aqueous solution with the finite concentration requirement, reaction system is applied pulsed dc voltage, make positive electrode extremely can carry out discharge catalytic by original position generation loaded catalyst in the surface, ionogen is H
3PO
4Or NaOH, its concentration range is respectively 0.01～1mol/L and 1～20g/L, and anode electrode is a titanium metal, or titanium alloy, or the titanium of silver-doped or iron or tungsten, and the yin, yang interelectrode distance is 2mm～1000mm, and the anode electrode surface-area that inserts in the liquid is 1～1000cm
2, crest voltage is 200～10000V, and frequency is 50Hz～50kHz, and dutycycle is 1/360～1/60, and aqueous temperature is 0～80 ℃, and the treatment time is 20 minutes～4 hours, and this method is divided into static treatment mode and dynamichandling mode, and concrete treatment step is:
1) static treatment mode: in pending liquid, add ionogen by described concentration range;
Dynamichandling mode: in pending liquid input tube road, inject ionogen by described concentration range adjustablely;
2) open ventilation system;
3) in reaction tank, insert electrode;
4) will be mixed with in the electrolytical pending liquid input reaction tank;
5) connect power supply, and boosted voltage is a stable discharging under the 200-10000V magnitude of voltage at crest voltage gradually to the sparking voltage threshold value,
6) static treatment mode: the variation of timing sampling chemical examination water quality, by calculating treatmenting time in advance, and, determine to handle the concluding time in conjunction with the result who chemically examines;
The dynamichandling mode: analyze the water quality after the effusive processing of reaction tank, the result in conjunction with chemically examining regulates suitable flow, and treatment effect is met the demands;
When 7) processing finishes, reduce voltage to 10～20V gradually after, close power supply and ventilation system again; For the dynamichandling mode, before reducing voltage gradually, stop earlier importing pending liquid in reaction tank.
2, micro plasma arc discharging catalytic water treatment method according to claim 1 is characterized in that, described ionogen is Na
2CO
3, NaAlO
2, Na
2SO
4, Na
3PO
4In a kind of, its concentration range is respectively 1～30g/L, 1～30g/L, 2～20g/L, 10～60g/L.
3, micro plasma arc discharging catalytic water treatment method according to claim 1, its anode electrode are characterised in that described anode electrode is shaped as needle-like or tabular.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101342726A CN100532283C (en) | 2006-11-11 | 2006-11-11 | Micro plasma arc discharging catalytic water treatment method |
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|---|---|---|---|
| CNB2006101342726A CN100532283C (en) | 2006-11-11 | 2006-11-11 | Micro plasma arc discharging catalytic water treatment method |
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| CN1948172A CN1948172A (en) | 2007-04-18 |
| CN100532283C true CN100532283C (en) | 2009-08-26 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104609499A (en) * | 2015-01-08 | 2015-05-13 | 中山大学 | Method for directly purifying drinking water with micro-plasmas |
| CN104709971A (en) * | 2015-03-20 | 2015-06-17 | 大连海事大学 | Micro-plasma arc discharge catalyzed water treatment method utilizing alternating-current power source |
| CN104709970A (en) * | 2015-03-20 | 2015-06-17 | 大连海事大学 | Method for catalyzing water treatment by performing microplasma arc discharge with asymmetric electrodes |
| CN104692484A (en) * | 2015-03-20 | 2015-06-10 | 大连海事大学 | Water treatment method for carrying out microplasma arc discharge catalysis through titanium-aluminum bimetallic electrodes |
| CN106587276A (en) * | 2015-10-19 | 2017-04-26 | 北京师范大学 | Method and device for degrading organic matter in waste water by cathodic microarc discharge plasma |
| CN106362718A (en) * | 2016-08-17 | 2017-02-01 | 华南理工大学 | ZrO2/TiO2 composite photocatalyst and its preparation method and use |
| CN110003679A (en) * | 2019-02-28 | 2019-07-12 | 苏州卡利肯新光讯科技有限公司 | A kind of bulk film reflecting mirror and preparation method thereof |
| CN110841577A (en) * | 2019-12-06 | 2020-02-28 | 大连海事大学 | Device for simultaneously preparing hydrogen-rich synthesis gas and carbon nanoparticles |
| CN113182324B (en) * | 2021-04-28 | 2022-10-18 | 常熟理工学院 | Method for converting household garbage incineration fly ash into high-performance wastewater treatment agent by utilizing micro-plasma discharge |
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2006
- 2006-11-11 CN CNB2006101342726A patent/CN100532283C/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| 气液滑动弧放电降解4-氯酚溶液的研究. 杜长明，严建华，李晓东，岑可法，倪明江，卫樱蕾.中国电机工程学报，第26卷第13期. 2006 |
| 气液滑动弧放电降解4-氯酚溶液的研究. 杜长明，严建华，李晓东，岑可法，倪明江，卫樱蕾.中国电机工程学报，第26卷第13期. 2006 * |
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