CN201099636Y - Three phase alternating-current sliding arc non- equilibrium plasma sewage processor - Google Patents

Three phase alternating-current sliding arc non- equilibrium plasma sewage processor Download PDF

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Publication number
CN201099636Y
CN201099636Y CNU2007200529754U CN200720052975U CN201099636Y CN 201099636 Y CN201099636 Y CN 201099636Y CN U2007200529754 U CNU2007200529754 U CN U2007200529754U CN 200720052975 U CN200720052975 U CN 200720052975U CN 201099636 Y CN201099636 Y CN 201099636Y
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China
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phase alternating
alternating current
arc discharge
sewage
gliding arc
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Expired - Fee Related
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CNU2007200529754U
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Chinese (zh)
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杜长明
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Sun Yat Sen University
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Sun Yat Sen University
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Abstract

The utility model relates to a three-phase alternative-current slide arc imbalance plasma sewage treatment device, which comprises a three-phase alternative-current high pressure power supply 1, a water cooling glass reaction vessel 3, three tool form metal electrodes 5, an insulation cover 4 and an atomization nozzle 6, wherein the three electrodes 5 are respectively connected with three phase lines of the three-phase alternative-current plasma power supply, the sewage provided by a sewage source 8 and the gas provided with a gas source 9 are mixed by the atomization nozzle 6 to be injected into the water cooling glass reaction vessel 3, the high-voltage breakdown arc of minimum distance between the gas-liquid mixture drive electrodes quickly slides along the surface to the electrodes toward descending to form pulse slide arc discharge 10 on the surface of the electrode to generate slide arc imbalance plasma containing active grains as O, OH, H2O2, HO2, H, ultraviolet light and other components, and the organic pollutant in sewage is degraded into small molecular organics via the oxidization of the active grains and the photolysis of the ultraviolet light, even directly converted into carbon dioxide and water or the like.

Description

A kind of three-phase alternating current gliding arc discharge plasma waste disposal plant
Technical field
The utility model relates to a kind of three-phase alternating current gliding arc discharge plasma waste disposal plant, belongs to environmental technology and water treatment field.
Background technology
Compare in the application in off gas treatment field with plasma technique, non-equilibrium plasma (or Athermal plasma) is started late in water treatment, because it has unique advantage and contaminant removal efficiency preferably, presents good prospects for application, becomes the research focus gradually.The producing method of nonequilibrium plasma has glow discharge, corona discharge, impulsive discharge, dielectric barrier discharge and non-thermal arc discharge etc.AyrtonH. had delivered voltage one current characteristics of the free non-thermic arc of carbon dioxide process carbon electrode in the atmosphere in 1902, and had listed the term of reference of the non-thermic arc of this freedom; Lesueur H. in 1988 and Czernichowski A. etc. have proposed to produce the non-thermic arc plasma body of normal atmosphere (French Patent 2639172) with the gliding arc discharge device of air stream drives and cooling electric arc; Afterwards, foreign study personnel such as France, the U.S., Russia, Poland have also carried out the research of gliding arc discharge, research not only comprises the physical theory analysis of gliding arc discharge plasma body, but also its be applied to the air stream contamination thing control, produce fields such as synthetic gas, organic solvent purification, equilibrium state and nonequilibrium state (Fridman A. in the gliding arc discharge have been analyzed as Fridman A. etc., et al.J.Prog.Energy andComb.Sci.1999,25:211-231.); Czernichowski A. etc. utilizes hydrogen H 2As reducing gas catalytic decomposition SO 2, studies show that 67%SO 2Be converted into elemental sulfur, utilize the gliding arc discharge plasma body to remove the research of volatility organic contaminations such as formaldehyde, toluene and heptane, the maximum material removal rate of heptane can reach 100% (Czernichowski A., et al.Chemtech.1996,26 (4): 45-49.); Krawczyk K. etc. has reported that utilizing gliding arc discharge to handle contains CCl 4Waste gas, CCl 4Degradation rate reach 100% (Krawczyk K., et al.Plasma Chem.Plasma Process.2003,24 (2): 155-167.); Two electrodes that people's handles such as Moussa D. link to each other with power supply are installed in directly over the organic solvent, the active particle that the single phase ac gliding arc discharge that forms produces is squeezed in the liquid, the oxygenolysis organism (Moussa D., et al.J.Hazard.Mater.B.2003,102:189-200.).Domestic, the research of gliding arc discharge is in the starting stage, certain research is being arranged aspect the gliding arc discharge physical property, early developed magnetic as Lin Lie etc. and driven gliding arc discharge normal atmosphere nonequilibrium plasma (Chinese patent 97111936.8), research mainly concentrates on the gliding arc discharge physical property aspect of the pure air stream drives of direct current; Xia Weidong etc. carried out the discharge characteristic research that direct current two electrode magnetic drive the slippage arc (Li Lei, Xia Weidong, etc. nuclear technique .2004,27 (5): 350-353.); But research is very few aspect the control of pollutent, mainly be the research that Du Changming etc. carries out the single phase ac gliding arc discharge, and it is applied to remove (Du Changming such as polycyclic aromatic hydrocarbons, carbon black granules in the waste gas, Deng. Proceedings of the CSEE .2006,26 (1): 77-81.), studies show that the single phase ac gliding arc discharge has weak points such as electrical discharge zone is little, processing power is little.Up to now, Review domestic document and data still do not have research or report that the three-phase alternating current gliding arc discharge plasma is disposed of sewage.
Summary of the invention
The purpose of this utility model provides the three-phase alternating current gliding arc discharge plasma waste disposal plant that a kind of cost is low, electrical discharge zone is big, processing power is strong.
The purpose of this utility model is achieved in that
A kind of three-phase alternating current gliding arc discharge plasma waste disposal plant comprises: three-phase alternating current high-voltage power supply 1, plasma reactor main body, fog system etc.The plasma reactor main body is made of 3,3 knife-edge metal electrodes 5 of water-cooled glass reaction still and insulating cover 4, and electrode is fixed in the insulating cover by insulation column 2, and links to each other with supply lead by the preassembled metallic conductor in the insulation column; Fog system is made of atomizing nozzle 6, water pump 7, source of sewage 8 and carrier gas source 9.
Described three-phase alternating current high-voltage power supply 1, for having the transformer that boosts with current-limiting function, the voltage control of output is in the 5-10kV scope.
Described 3 knife-edge metal electrodes 5 are arranged by differing 120 degree, and the minor increment between adjacent two electrodes is in the 1-3mm scope; Make the material of electrode and can select tungsten, aluminium and stainless steel etc. for use; The thickness of electrode is 1-2mm, long 50-100mm, and wide 20-35mm, concrete size is determined according to the size of nonequilibrium plasma generation device power.
Described water-cooled glass reaction still 3 adopts two form of sleeve, comprises water port 11, cooling water inlet 12 cooling water outlets 13 and venting port 14, and its concrete size is determined according to the size of electrode 5.
Described insulating cover 4 and insulation column 2 adopt insulating material such as teflon rod or nylon rod to make, and its concrete size is determined according to the size of electrode 5 and water-cooled glass reaction still 3.
The nozzle diameter of described atomizing nozzle 6 is 0.5-2mm.
Described source of sewage 8 can be the waste water that industries such as chemical reaction, dyestuff, printing and dyeing, fermentation, pharmacy, papermaking produce, and flow control is in the 1-6L/h scope.
The gas of described carrier gas source 9 is air or oxygen, and flow control is in the 200-1000L/h scope.
The dirty sewage water treatment method of nonequilibrium plasma is:
1) at first opens chilled water unit water coolant is provided;
2) open source of sewage 8, utilize water pump and under meter in the system to regulate the control discharge of sewage, open carrier gas source 9, utilize under meter adjusting control airshed in the system, sewage and carrier gas stream produce the gas-liquid mixture fluid by atomizing nozzle 6;
3) connect power supply, regulate the high-pressure side output voltage of three-phase alternating current high-voltage power supply 1, utilize interelectrode potential difference minimum distance between electrode to form disruptive discharge electric arc, formation time between 3 electrical discharge arcs differs 120 degree on phase place, 3 disruptive discharge electric arcs are under the driving of gas-liquid flow, slide downstream along electrode surface fast, and after reaching certain-length, extinguishes on electric arc, meanwhile, electric arc is lighted in interelectrode minimum distance again, and the repetition said process, form pulsed gliding arc discharge 10, thus produce comprise O, OH, H 2O 2, HO 2Three-phase alternating current gliding arc discharge plasma with H isoreactivity particle, ultraviolet ray and other compositions, organic pollutant in the sewage is degraded to small organic molecule under effects such as active particle oxidation, ultraviolet photodissociation, even is converted into carbonic acid gas and water etc.
Three-phase alternating current gliding arc discharge plasma sewage sewage water treatment method described in the utility model and device have following characteristics:
1) generate in the gas-liquid gliding arc discharge process a large amount of active particles ( OH, O, HO 2, H 2O 2And H 3O +Deng) and ultraviolet ray.
High-energy particle bombardment H 2O and O 2Generate OH and O:
H 2O+e -→H+ ·OH+e -
e -+H 2O→2e -+O+H ·+H +
O 2+e -→2O+e -
O 2+H ·→HO 2 ·
OH also can be by H 2O and O collision produce:
H 2O+O→ ·OH+ ·OH
H 2O+e -→H 2O ++2e -
H 2O 2Produce and on the whole can be expressed as:
2H 2O→H 2O 2+H 2
Water generation ionization reaction generates oxonium ion H 3O +:
H 2O+e -→H 2O ++2e -
H 2O ++H 2O→H 3O ++OH *
H then 3O +With water very fast response, generate cluster ion:
H 3O ++2H 2O→H 5O 2 ++H 2O
H +·(n-1)H 2O+2H 2O→H +·nH 2O+H 2O
When air as carrier gas, excited state nitrogen can form NO The oxidisability particle:
N 2 *+O 2→2NO ·
2) sewage is atomized into the aerosol form, has increased the concentration of drop surface contaminant, different surfaces tension force constant liquid mixing, and surface tension constant is little the trend that is concentrated to the surface; Small diameter drops has been strengthened this process, and pollutent is concentrated in the electrical discharge zone, has increased the probability of contact active particle.
3) strengthened the electric field on drop surface, the water of high-k (ε=81) has improved the strength of electric field on top layer, compares the electronic and ionic snowslide with single medium and will occur in the drop surface.
4) the surface area contacted increase of aqueous vapor has improved the mass transfer factor of active particle and pollutent, helps the degraded of pollutent in the sewage.
Three-phase alternating current gliding arc discharge plasma device described in the utility model can be applied to the sewage disposal in the environmental engineering, and the organic waste water as industries such as degraded chemical reaction, dyestuff, printing and dyeing, fermentation, pharmacy produce also can be used for water sterilization.
Description of drawings
Accompanying drawing is a structural representation of the present utility model.
Among the figure: 1 three-phase alternating current high-voltage power supply, 2 insulation columns, 3 water-cooled glass reaction stills, 4 insulating covers, 5 electrodes, 6 atomizing nozzles, 7 water pumps, 8 source of sewage, 9 carrier gas source, 10 gliding arc discharges, 11 water port, 12 cooling water inlets, 13 cooling water outlets, 14 venting ports.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described.
Embodiment 1
With reference to the accompanying drawings, 3 electrodes 5 are connected with 3 phase lines of three-phase alternating current plasma electrical source respectively, the gas that sewage that source of sewage 8 provides and carrier gas source 9 provide forms the gas-liquid mixture injection by atomizing nozzle 6 and enters water-cooled glass reaction still 3, and the starting the arc end of the minor increment of gas-liquid mixture between electrode flows to the water port end of water-cooled glass reaction still 3.
In the present embodiment, the output voltage of three-phase alternating current high-voltage power supply 1 is controlled at 5kV; 3 electrodes all adopt the metallic substance stainless steel to make, and the minor increment between adjacent two electrodes is 2mm, the thick 2mm of electrode, long 100mm, wide 30mm; Water-cooled glass reaction still 3 diameter 100mm, volume 2L; Insulation column 2 and insulating cover 4 adopt the teflon rod insulating material to make insulating cover 4 diameter 100mm, high 50mm; The gas of carrier gas source 9 is air, and flow control is at 600L/h; Source of sewage 8 is phenol, 4-chlorophenol simulated wastewater, volume 1L.Experiment condition and test data and result are as shown in table 1.
Table 1
Pollutent The discharge of sewage (L/h) Starting point concentration (mg/L) Treatment time (min) Ultimate density (mg/L) Clearance (%)
Phenol 2 200 30 17 91.5
Phenol 2 400 30 79 80
The 4-chlorophenol 2 200 30 25 87.5
The 4-chlorophenol 2 400 30 75 81
Embodiment 2
The device of present embodiment is with embodiment 1, and its difference only is: the output voltage of three-phase alternating current high-voltage power supply 1 is controlled at 10kV; The gas of carrier gas source 9 is selected air and oxygen respectively for use, and flow control is at 800L/h; Source of sewage 8 is azo acid orange 7 simulation dyeing waste water.Experiment condition and test data and result are as shown in table 2.
Table 2
Pollutent The carrier gas type The discharge of sewage (L/h) Starting point concentration (mg/L) Treatment time (min) Ultimate density (mg/L) Clearance (%)
Acid orange 7 Air 2.4 50 25 5 90
Acid orange 7 Oxygen 2.4 50 25 1 98
Acid orange 7 Air 2.4 100 25 24 76
Acid orange 7 Oxygen 2.4 100 25 15 85
Acid orange 7 Air 2.4 200 25 56 72
Acid orange 7 Oxygen 2.4 200 25 40 80

Claims (8)

1. three-phase alternating current gliding arc discharge plasma waste disposal plant, it is characterized in that comprising: three-phase alternating current high-voltage power supply (1), plasma reactor main body, fog system, the plasma reactor main body is made of water-cooled glass reaction still (3), 3 knife-edge metal electrodes (5) and insulating cover (4), electrode is fixed in the insulating cover by insulation column (2), and links to each other with supply lead by the preassembled metallic conductor in the insulation column; Fog system is made of atomizing nozzle (6), water pump (7), source of sewage (8) and carrier gas source (9).
2. three-phase alternating current gliding arc discharge plasma waste disposal plant according to claim 1, it is characterized in that: described three-phase alternating current high-voltage power supply (1), for having the transformer that boosts with current-limiting function, the voltage control of output is in the 5-10kV scope.
3. three-phase alternating current gliding arc discharge plasma waste disposal plant according to claim 1 is characterized in that: described 3 knife-edge metal electrodes (5) are arranged by differing 120 degree, and the minor increment between adjacent two electrodes is in the 1-3mm scope; Make the material of electrode and can select tungsten, aluminium and stainless steel for use; The thickness of electrode is 1-2mm, long 50-100mm, wide 20-35mm.
4. three-phase alternating current gliding arc discharge plasma waste disposal plant according to claim 1 and 2, it is characterized in that: described water-cooled glass reaction still (3) adopts two form of sleeve, comprises water port (11), cooling water inlet (12) cooling water outlet (13) and venting port (14).
5. according to claim 1,2 or 3 described three-phase alternating current gliding arc discharge plasma waste disposal plants, it is characterized in that: described insulating cover (4) and insulation column (2) adopt teflon rod or nylon rod insulating material to make.
6. three-phase alternating current gliding arc discharge plasma waste disposal plant according to claim 1 is characterized in that: the nozzle diameter of described atomizing nozzle (6) is 0.5-2mm.
7. three-phase alternating current gliding arc discharge plasma waste disposal plant according to claim 1, it is characterized in that: described source of sewage (8), can be the waste water of chemical reaction, dyestuff, printing and dyeing, fermentation, pharmacy, paper industry generation, flow control be in the 1-6L/h scope.
8. three-phase alternating current gliding arc discharge plasma waste disposal plant according to claim 1 is characterized in that: the gas of described carrier gas source (9) is air or oxygen, and flow control is in the 200-1000L/h scope.
CNU2007200529754U 2007-06-19 2007-06-19 Three phase alternating-current sliding arc non- equilibrium plasma sewage processor Expired - Fee Related CN201099636Y (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102625559A (en) * 2012-03-30 2012-08-01 安徽航天环境工程有限公司 Long-service-life double-igniting plasma burning torch
CN102870502A (en) * 2010-02-10 2013-01-09 阿尔弗雷多·佐莱齐-加勒东 Method and apparatus for applying plasma particles to a liquid and use for disinfecting water
CN103880127A (en) * 2012-12-21 2014-06-25 陈晓波 Plasma tubular liquid surface discharge water treatment device
CN104276634A (en) * 2014-09-11 2015-01-14 中山大学 Method for sterilizing effluent water of non-thermal arc plasma water purification plant
CN104495746A (en) * 2014-12-12 2015-04-08 中山大学 Device for producing synthetic gas by pyrolysis of biomass from plasma
CN105025934A (en) * 2013-03-06 2015-11-04 爱科热电有限公司 Main body and system comprising multiple nozzles for cleaning an object, in particular a medical product, and method for producing such a main body
CN105948372A (en) * 2016-06-24 2016-09-21 石家庄铁道大学 Industrial sewage treatment technique and system based on high-voltage nanosecond pulsed electric field technology

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102870502A (en) * 2010-02-10 2013-01-09 阿尔弗雷多·佐莱齐-加勒东 Method and apparatus for applying plasma particles to a liquid and use for disinfecting water
CN102625559A (en) * 2012-03-30 2012-08-01 安徽航天环境工程有限公司 Long-service-life double-igniting plasma burning torch
CN102625559B (en) * 2012-03-30 2014-06-04 安徽航天环境工程有限公司 Long-service-life double-igniting plasma burning torch
CN103880127A (en) * 2012-12-21 2014-06-25 陈晓波 Plasma tubular liquid surface discharge water treatment device
CN105025934A (en) * 2013-03-06 2015-11-04 爱科热电有限公司 Main body and system comprising multiple nozzles for cleaning an object, in particular a medical product, and method for producing such a main body
CN105025934B (en) * 2013-03-06 2019-04-09 爱科热电有限公司 For carrying out clean method and apparatus to target
CN104276634A (en) * 2014-09-11 2015-01-14 中山大学 Method for sterilizing effluent water of non-thermal arc plasma water purification plant
CN104495746A (en) * 2014-12-12 2015-04-08 中山大学 Device for producing synthetic gas by pyrolysis of biomass from plasma
CN105948372A (en) * 2016-06-24 2016-09-21 石家庄铁道大学 Industrial sewage treatment technique and system based on high-voltage nanosecond pulsed electric field technology

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Granted publication date: 20080813

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