CN103073094A - Liquid layer resistor blocking discharge device and water treatment method thereof - Google Patents
Liquid layer resistor blocking discharge device and water treatment method thereof Download PDFInfo
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- CN103073094A CN103073094A CN2013100334525A CN201310033452A CN103073094A CN 103073094 A CN103073094 A CN 103073094A CN 2013100334525 A CN2013100334525 A CN 2013100334525A CN 201310033452 A CN201310033452 A CN 201310033452A CN 103073094 A CN103073094 A CN 103073094A
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Abstract
The invention relates to a liquid layer resistor blocking discharge device and a water treatment method thereof. The liquid layer resistor blocking discharge device comprises a water storage tank and a discharge device, wherein the water storage tank is connected with the discharge device; the discharge device is divided into two layers vertically; the upper layer sequentially comprises an active carbon fiber high voltage electrode, an organic glass insulation layer and an active carbon fiber ground electrode from a liquid inlet direction to a liquid outlet direction; the lower layer of the discharge device comprises a guide plate; a box body structure is formed by the upper layer and the lower layer; and a water pump and a flow meter are sequentially arranged between the water storage tank and the discharge device. After a liquid enters the discharge device, a liquid layer is formed on the guide plate; the active carbon fiber high voltage electrode and the active carbon fiber ground electrode are arranged on the liquid layer; and high voltage gas phase discharge is conducted for reacting with a pollutant in the liquid layer, so as to remove the pollutant in the liquid layer, or to reduce a concentration of the pollutant. According to the liquid layer resistor blocking discharge device and the water treatment method, a discharge space is separated by the liquid layer, and the discharge of a high voltage electrode zone and a ground electrode zone occurs independently, so that breakdown voltage of spark discharge is increased; and a contact area between a gas phase plasma and a liquid level is multiplied, so that the energy efficiency of water treatment is improved.
Description
Technical field
The present invention relates to a kind of method and apparatus of electrion water treatment.
Background technology
Compare with discharge under the liquid, the energy efficiency of liquid discharge surface water treatment is higher.Because the partition effect of gas cloud between discharge electrode and the liquid level, leakage conductance electric current and joule heating effect all obviously reduce.Yet the selection of liquid discharge surface interelectrode distance is subject to the problem of conflict: the chemical effect of discharge reduces and raises with interelectrode distance, and the voltage breakdown of spark discharge reducing and reduce with interelectrode distance.In water treatment procedure, wish that discharge reactor has high chemical effect and high spark breakdown voltage simultaneously.For realizing this purpose, high-pressure stage and ground electrode are all placed on the liquid level, consist of a liquid layer resistance barrier discharge reactor.
Summary of the invention
The purpose of this invention is to provide a kind of brand-new liquid level discharge reactor, with the voltage breakdown of raising spark discharge and the energy efficiency of water treatment.
A kind of liquid layer resistance discharge-blocking device, comprise aqua storage tank, electric discharge device, aqua storage tank links to each other with electric discharge device, electric discharge device is divided into two-layer up and down, the upper strata is followed successively by activated carbon fiber high-pressure stage, synthetic glass insulation layer, activated carbon fiber ground electrode from feed liquor to the fluid direction, electric discharge device lower floor is flow deflector, up and down two-layer composition body structure.Be provided with successively water pump and under meter between aqua storage tank and the electric discharge device.
The method of a kind of described high-voltage discharge plasma generation device water treatment, form liquid layer at flow deflector behind the electric discharge device feed liquor, thickness is the 1-10 millimeter, activated carbon fiber high-pressure stage and activated carbon fiber ground electrode place on the liquid layer, with the liquid level spacing be the 3-20 millimeter, the discharge of 10-50 kilovolt high pressure vapor, activated carbon fiber high-pressure stage and activated carbon fiber ground electrode form big area and uniform plasma body in gas cloud, active substance in the plasma body comprises ozone, hydroxyl radical free radical, single oxyradical, active oxygen species is absorbed by liquid level and enters liquid layer, react with pollutent in the liquid layer, thereby the concentration of pollutent or reduction pollutent in the removal liquid layer, treated liquid layer is back to aqua storage tank and continues circular treatment.
The method of a kind of described high-voltage discharge plasma generation device water treatment, with 2-10 liquid layer resistance discharge-blocking device series connection, pending liquid flows through each liquid layer resistance discharge-blocking device successively, form liquid layer at flow deflector, thickness is the 1-10 millimeter, activated carbon fiber high-pressure stage and activated carbon fiber ground electrode place on the liquid layer, with the liquid level spacing be the 3-20 millimeter, the discharge of 10-50 kilovolt high pressure vapor, activated carbon fiber high-pressure stage and activated carbon fiber ground electrode form big area and uniform plasma body in gas cloud, active substance in the plasma body comprises ozone, hydroxyl radical free radical, single oxyradical, active oxygen species is absorbed by liquid level and enters liquid layer, react with pollutent in the liquid layer, thereby the concentration of pollutent or reduction pollutent in the removal liquid layer, liquid layer after treatment directly discharges, and need not circulate.
Beneficial effect of the present invention: liquid layer of the present invention is separated into high pressure polar region and polar region, ground with discharge space, and discharge channel can not continuously development in whole discharge space.Therefore, the discharge of high pressure polar region and polar region, ground independently occurs, thereby has improved the voltage breakdown of spark discharge.On the other hand, same owing to the compartmentation of liquid layer to discharge space, the contact area multiplication of gas phase plasma body and liquid level, thus improved the energy efficiency of water treatment.
Description of drawings
Fig. 1 is the structural representation of liquid layer resistance discharge-blocking device.
Fig. 2 is another structural representation of liquid layer resistance discharge-blocking device.
Fig. 3 is the method schematic diagram of high-voltage discharge plasma generation device water treatment.
Fig. 4 is the other method schematic diagram of high-voltage discharge plasma generation device water treatment.
Fig. 5 is that the voltage-to-current of liquid layer resistance barrier discharge and conventional liquid level discharge concerns comparison diagram.
Fig. 6 is liquid layer resistance barrier discharge and conventional liquid level discharge tetravalence sulphur rate of oxidation comparison diagram.
Embodiment
The present invention is described further below in conjunction with drawings and Examples.
As shown in Figure 1, a kind of liquid layer resistance discharge-blocking device, comprise aqua storage tank 5 and electric discharge device, aqua storage tank 5 links to each other with electric discharge device, electric discharge device is divided into two-layer up and down, the upper strata is followed successively by activated carbon fiber high-pressure stage 1, synthetic glass insulation layer 2, activated carbon fiber ground electrode 3 from feed liquor to the fluid direction, electric discharge device lower floor is flow deflector 4, up and down two-layer composition body structure.As shown in Figure 2, be provided with successively water pump 6 and under meter 7 between the aqua storage tank 5 of liquid layer resistance discharge-blocking device and the electric discharge device.
As shown in Figure 3, a kind of method of described high-voltage discharge plasma water treatment, form liquid layer at flow deflector 4 behind the electric discharge device feed liquor, thickness is the 1-10 millimeter, activated carbon fiber high-pressure stage 1 places on the liquid layer with activated carbon fiber ground electrode 3, with the liquid level spacing be the 3-20 millimeter, the discharge of 10-50 kilovolt high pressure vapor, activated carbon fiber high-pressure stage 1 forms big area and uniform plasma body with activated carbon fiber ground electrode 3 in gas cloud, active substance in the plasma body comprises ozone, hydroxyl radical free radical, single oxyradical, active oxygen species is absorbed by liquid level and enters liquid layer, react with pollutent in the liquid layer, thereby the concentration of pollutent or reduction pollutent in the removal liquid layer, treated liquid layer are back to aqua storage tank 5 and continue circular treatment or directly discharge.
As shown in Figure 4, a kind of method of described high-voltage discharge plasma water treatment, it is characterized in that, with 2-10 electric discharge device series connection, pending liquid flows through each liquid layer resistance discharge-blocking device successively, form liquid layer at flow deflector 4, thickness is the 1-10 millimeter, activated carbon fiber high-pressure stage 1 places on the liquid layer with activated carbon fiber ground electrode 3, with the liquid level spacing be the 3-20 millimeter, the discharge of 10-50 kilovolt high pressure vapor, activated carbon fiber high-pressure stage 1 forms big area and uniform plasma body with activated carbon fiber ground electrode 3 in gas cloud, active substance in the plasma body comprises ozone, hydroxyl radical free radical, single oxyradical, active oxygen species is absorbed by liquid level and enters liquid layer, react with pollutent in the liquid layer, thereby the concentration of pollutent or reduction pollutent in the removal liquid layer, liquid layer after treatment directly discharges, and need not circulate.
Embodiment
Adopt the tetravalence sulphur in the liquid layer resistance barrier discharge technology aqueous oxidizing of the present invention, electrical conductivity of solution is 20 mS.cm
-1, the initial pH=3 of solution, initial tetravalence sulphur concentration is 2 mmol/L, the long and wide all 17.5cm not of activated carbon fiber high-pressure stage and gac ground electrode, liquid layer thickness is 7mm on the flow deflector, the liquor capacity of processing is 2 L.Used single pulse energy is 25 mJ, and voltage is 37kV, and pulse-repetition is 100 pulse per seconds.
Fig. 5 has provided the voltage-to-current relation contrast of liquid layer resistance barrier discharge and conventional liquid level discharge.Can find out, the electric current of liquid layer resistance barrier discharge is starkly lower than conventional liquid level discharge, prove that the liquid layer conductive discharge can the too fast rising of Limited Current, thus the voltage breakdown of raising spark discharge.
Fig. 6 has provided liquid layer resistance barrier discharge and the contrast of conventional liquid level discharge tetravalence sulphur rate of oxidation.Can find out, under identical single pulse energy, the rate of oxidation of liquid layer resistance barrier discharge oxidation tetravalence sulphur is discharged apparently higher than conventional liquid level, proves that liquid layer resistance barrier discharge can improve speed and the energy efficiency of high-voltage discharge plasma water treatment.
When processing the water yield hour, electric discharge device of the present invention can independently use, and pending water cycle is processed.When processing flux was larger, electric discharge device of the present invention can be used as the discharge cell of large flux Continuous Flow system for handling.
Claims (4)
1. liquid layer resistance discharge-blocking device, it is characterized in that, it comprises two-layer up and down, the upper strata is followed successively by activated carbon fiber high-pressure stage (1), synthetic glass insulation layer (2), activated carbon fiber ground electrode (3) from feed liquor to the fluid direction, electric discharge device lower floor is flow deflector (4), up and down two-layer composition body structure.
2. high-voltage discharge plasma water treatment device according to claim 1 is characterized in that, is provided with successively water pump (6) and under meter (7) between aqua storage tank (5) and the electric discharge device.
3. the method for a high-voltage discharge plasma water treatment according to claim 1 and 2, it is characterized in that, form liquid layer at flow deflector (4) behind the electric discharge device feed liquor, thickness is the 1-10 millimeter, activated carbon fiber high-pressure stage (1) places on the liquid layer with activated carbon fiber ground electrode (3), with the liquid level spacing be the 3-20 millimeter, the discharge of 10-50 kilovolt high pressure vapor, activated carbon fiber high-pressure stage (1) forms big area and uniform plasma body with activated carbon fiber ground electrode (3) in gas cloud, active substance in the plasma body comprises ozone, hydroxyl radical free radical, single oxyradical, active oxygen species is absorbed by liquid level and enters liquid layer, react with pollutent in the liquid layer, thereby the concentration of pollutent or reduction pollutent in the removal liquid layer, treated liquid layer is back to aqua storage tank (4) and continues circular treatment.
4. the method for a high-voltage discharge plasma water treatment according to claim 1 and 2, it is characterized in that, with 2-10 electric discharge device series connection, pending liquid flows through each liquid layer resistance discharge-blocking device successively, form liquid layer at flow deflector (4), thickness is the 1-10 millimeter, activated carbon fiber high-pressure stage (1) places on the liquid layer with activated carbon fiber ground electrode (3), with the liquid level spacing be the 3-20 millimeter, 10-50 kilovolt high pressure vapor parallel discharge, activated carbon fiber high-pressure stage (1) forms big area and uniform plasma body with activated carbon fiber ground electrode (3) in gas cloud, active substance in the plasma body comprises ozone, hydroxyl radical free radical, single oxyradical, active oxygen species is absorbed by liquid level and enters liquid layer, react with pollutent in the liquid layer, thereby remove pollutent in the liquid layer or reduce the concentration of pollutent; Liquid layer after treatment directly discharges.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104925889A (en) * | 2015-05-12 | 2015-09-23 | 南京大学 | Bobbin type device for degrading triclocarban (TCC) in water by virtue of dielectric barrier discharge coordinated with activated carbon fiber and method of device |
| CN105347447A (en) * | 2015-10-28 | 2016-02-24 | 南华大学 | Method for purifying high salinity wastewater by electrostatic adsorption |
| CN105611711A (en) * | 2015-12-24 | 2016-05-25 | 河南理工大学 | Gas-liquid two-phase plasma generating device for polymer surface modification |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101743199A (en) * | 2007-07-11 | 2010-06-16 | Gr智力储备股份有限公司 | The nanoparticle and the nanoparticle/liquor that are used for treatment liq and make continuation method, device and the acquisition of some component (for example nanoparticle) at liquid |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101743199A (en) * | 2007-07-11 | 2010-06-16 | Gr智力储备股份有限公司 | The nanoparticle and the nanoparticle/liquor that are used for treatment liq and make continuation method, device and the acquisition of some component (for example nanoparticle) at liquid |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104925889A (en) * | 2015-05-12 | 2015-09-23 | 南京大学 | Bobbin type device for degrading triclocarban (TCC) in water by virtue of dielectric barrier discharge coordinated with activated carbon fiber and method of device |
| CN105347447A (en) * | 2015-10-28 | 2016-02-24 | 南华大学 | Method for purifying high salinity wastewater by electrostatic adsorption |
| CN105347447B (en) * | 2015-10-28 | 2018-06-19 | 南华大学 | Utilize the method for Electrostatic Absorption purification high-salt wastewater |
| CN105611711A (en) * | 2015-12-24 | 2016-05-25 | 河南理工大学 | Gas-liquid two-phase plasma generating device for polymer surface modification |
| CN105611711B (en) * | 2015-12-24 | 2017-10-20 | 河南理工大学 | A kind of polymer surface modification gas-liquid two-phase plasma generating device |
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Application publication date: 20130501 |