CN103159287B - Radial flow type DBD (Dielectric Barrier Discharge) thiamethoxam pesticide wastewater treatment equipment - Google Patents
Radial flow type DBD (Dielectric Barrier Discharge) thiamethoxam pesticide wastewater treatment equipment Download PDFInfo
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Abstract
The invention relates to radial flow type DBD (Dielectric Barrier Discharge) thiamethoxam pesticide wastewater treatment equipment. The radial flow type DBD thiamethoxam pesticide wastewater treatment equipment comprises a power supply, a reactor and a grounding electrode arranged in the reactor, wherein the reactor comprises a reaction cylinder and an overflow recoverer which surrounds the outer side wall of the reaction cylinder by one circle, a high-voltage electrode is arranged just above the open end of the reaction cylinder, a dielectric layer is arranged on the lower surface of the high-voltage electrode, a wastewater inlet of the reaction cylinder and a wastewater outlet of the overflow recoverer are communicated with each other through a circulating pipe, a wastewater tank and a peristaltic pump are arranged on a pipeline of the circulating pipe, the top end of the overflow recoverer is closed, a honeycomb ceramic layer is arranged at an opening of the reaction cylinder, and a TiO2 film is coated on the upper surface of the honeycomb ceramic layer. On the one hand, the hydrophilicity is improved through plasma so as to reduce the discharge clearance and obtain the high-density stable plasma; and on the other hand, ultraviolet light produced in a discharge process can be fully utilized for a photocatalytic reaction to improve the degradation efficiency of thiamethoxam pesticide wastewater.
Description
Technical field
The present invention is specifically related to a kind of radial-flow dielectric barrier discharge Diacloden pesticide waste water treatment device, belongs to sewage water-treatment technology field.
Background technology
China is pesticide producing big country, nearly 2000 of pesticide producing enterprise, and pesticide producing amount position is at the forefront in the world.And pesticide producing process will be brought a large amount of agricultural chemicals waste waters, this class waste water has the features such as COD concentration is high, the hazardous and noxious substances of difficult for biological degradation is many, and microorganism is had to strong inhibition toxic action.If agricultural chemicals waste water can not get effective processing, bring serious harm will to the mankind and environment.
Diacloden is a kind of s-generation nicotinoids high-efficient low toxicity insecticide of brand new, English name: Thiamethoxam, (2-chloro-1 for chemical name: 3-, 3-thiazole-5-ylmethyl)-5-methyl isophthalic acid, 3,5-oxadiazines-4-base fork (nitro) amine, trade name: Diacloden, its chemical structural formula is as follows:
Due to Diacloden stable chemical nature, conventional degradation method treatment effect is undesirable, in the widespread use of Diacloden agricultural chemicals, also environment has been caused to great pollution.The method of processing at present agricultural chemicals waste water mainly contains Physical, chemical method and biochemical process.But, fact proved that these traditional sewage water treatment methods do not make agricultural chemicals waste water well be administered.Recently, low-temperature plasma method is familiar with by people gradually as a kind of new sewage water treatment method, and its development that appears as environmental pollution treatment technology provides new thinking and technique.
Dielectric barrier discharge is a kind of strong ionization discharge, and the electron energy of generation, higher than other electric discharge, is more conducive to organic degraded.In reactor electrodes, add after high voltage electric, airborne electronics, under the effect of electrical forces, clashes into the O in air dielectric
2and H
2o, O
2and H
2o ionizes, and produces a large amount of active substances (OH, H, O, O
3) and uv-radiation, simultaneously catalyzer TiO
2use can increase active substance OH, greatly improved organic degradation efficiency.
Chinese patent CN102225791A(201110091754.9) a kind of radial-flow dielectric barrier discharge low-temperature plasma wastewater treatment equipment is disclosed, comprise power supply, high-pressure stage and earthing pole, high-pressure stage lower surface is provided with medium layer, also comprise reactor, reactor comprises reaction tube, overflow withdrawer, water intake and wastewater effluent mouth, reaction tube is the open column shape structure of an end opening the other end sealing, the outer wall of reaction tube is provided with the overflow withdrawer of the waste water that reclaims the outflow of reaction tube opening end, high-pressure stage be arranged at reaction tube opening end directly over, earthing pole is arranged in reaction tube, water intake is arranged at the horizontal section centre in reaction tube, wastewater effluent mouth is arranged at overflow withdrawer bottom.The present invention can produce the low-temperature plasma of large volume, high-energy concentration in wider air pressure range, the agricultural chemicals waste waters such as Ti304 of can effectively degrading.But the reaction tube of this wastewater treatment equipment, overflow withdrawer are opening setting, the UV-light producing in discharge process and O
3easily diffuse to the external world, can not get sufficient utilization, cause the waste of resource.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of simple in structure, discharging distance is little, plasma intensity is large, discharge stability, plasma body, ozone and the high radial-flow dielectric barrier discharge Diacloden pesticide waste water treatment device of UV-light utilization ratio.
A kind of radial-flow dielectric barrier discharge Diacloden pesticide waste water treatment device, comprise power supply, reactor and be arranged on the earthing pole in reactor, described reactor comprises reaction tube and around the reaction tube outer side wall overflow withdrawer of a week, described reaction tube is the cylinder-like structure of an end opening the other end sealing, directly over reaction tube opening end, be provided with high-pressure stage, the lower surface of high-pressure stage is provided with medium layer, in reaction tube bottom, be provided with water intake, the bottom of overflow withdrawer is provided with wastewater effluent mouth, described water intake is connected by circulation tube with wastewater effluent mouth, on the pipeline of circulation tube, be provided with wastewater trough and peristaltic pump, described overflow withdrawer sidewall is higher than the sidewall of reaction tube and in top closure, overflow withdrawer side wall upper part is provided with air outlet, between air outlet on overflow withdrawer sidewall and wastewater trough, be provided with vapor pipe, one end of vapor pipe is connected with air outlet, the other end extends in wastewater trough, the top of wastewater trough is provided with venting hole.
Preferred according to the present invention, described reaction tube opening part is provided with ceramic honey comb layer, further preferred, described ceramic honey comb layer is circular ceramic honey comb layer, and shape and reaction tube opening match, and the thickness of described circular ceramic honey comb layer is 0.5～2cm, diameter is 9～11cm, mean pore size is 1～3mm, and the upper surface of ceramic honey comb layer is concordant with reaction tube opening end, and ceramic honey comb layer upper surface is coated with TiO
2film.Waste water enters from the bottom of reaction tube, circular ceramic honey comb layer is positioned at the opening part of round shape reaction tube, and its upper surface flushes with reaction tube opening end, and wastewater streams is through ceramic honey comb layer, at ceramic honey comb upper surface, form moisture film, ceramic honey comb layer upper surface is coated with TiO
2film, makes full use of the ultraviolet producing in discharge process and carries out light-catalyzed reaction, can also produce more OH on its surface on the other hand, is conducive to the degraded of Diacloden agricultural chemicals waste water.
Preferred according to the present invention, the end, one end that described vapor pipe extends in wastewater trough is connected with aeration head, on the pipeline of vapor pipe, is provided with aeration pump, and preferred, aeration head is positioned at the bottom of wastewater trough.The gas producing in aeration pump abstraction reaction device, as O
3, through vapor pipe, importing in wastewater trough, the organism in waste water is degraded under the effect of various free radicals, ozone and UV-light, the UV-light producing in discharge process and O
3be fully utilized, it is more even that aeration head disperses gas in waste water, increases the contact area with waste water.
Preferably, the internal diameter of described cylindric reaction tube is 10～12cm, and described overflow withdrawer is the groove shape structure around reaction tube outer wall, the internal diameter 14～16cm of overflow withdrawer, and wall thickness is 1～2mm.
In described reaction tube, be also provided with baffle plate, the hollow cylindrical structure that described baffle plate is upper and lower both ends open, water intake is arranged on the bottom center place in reaction tube, and one end of circulation tube is passed water intake and is extended in open column shape baffle plate.
Further preferred, the internal diameter of hollow cylindrical baffle plate is 2～6mm, height is 3～5cm, the bottom of hollow cylindrical baffle plate is apart from reaction tube bottom 1～1.5cm, one end of circulation tube is through water intake and be positioned at hollow cylindrical baffle plate horizontal section middle position, the top closure of described circulation tube, irises out water hole apart from being provided with one on the circulation tube sidewall of top 0.5～1cm.Experimental results show that, the bottom of hollow cylindrical baffle plate is provided with posticum apart from the top closure of reaction tube bottom 1～1.5cm and circulation tube and makes into water in reaction tube bottom homogenizing, stable on pipe sidewall, to such an extent as to can pass stably ceramic honey comb layer, at ceramic honey comb layer upper surface, form uniform and stable moisture film, guaranteed discharging distance and electric discharge continue carry out.
The top of described overflow withdrawer is rectangle sealing plate, is provided with draw-in groove on sealing plate, and overflow withdrawer sidewall upper limb embeds in draw-in groove, and high-pressure stage is fixedly installed on sealing plate.Sealing plate forms enclosed construction with overflow withdrawer, reaction tube and high-pressure stage is sealed in wherein to the active substance producing in discharge process (OH, H, O, O
3) and ultraviolet radiation energy access sufficient utilization, prevent O
3diffuse to the external world, improve the degradation rate of material.
Described medium layer is circular quartz glass layer, and the vertical range on medium layer and reaction tube opening edge edge is 2～4mm.The vertical range on medium layer and reaction tube opening edge edge is discharging distance, and arcing distance of the present invention is little, and the processing efficiency of waste water is high.
Preferably, be provided with the gas block panel perpendicular to wastewater trough bottom in described wastewater trough, described gas block panel is rectangular flat plate, and gas block panel separates the wastewater trough outlet of aeration head and wastewater trough bottom.Gas block panel separates the wastewater trough outlet of aeration head and wastewater trough bottom, to prevent that gas from entering in round shape reaction tube.
Described sealing plate is PVC material.
Described power supply is low-temperature plasma experimental power supply, and output voltage is 0-30K, and frequency is 1KHz-100KHz.
The present invention also provides a kind of TiO
2the preparation method of film, comprises that step is as follows:
1), the configuration of A solution: get tetrabutyl titanate and mix with dehydrated alcohol, stir, after 5～10min, slowly add anhydrous acetic acid, sealing, standing after continuation stirring 30～40min, described tetrabutyl titanate: dehydrated alcohol: anhydrous acetic acid volume ratio is: (12～15): (48～50): (5～8);
2), the configuration of B solution: get dehydrated alcohol and mix with anhydrous acetic acid, add deionized water, 25～30min, described dehydrated alcohol: anhydrous acetic acid: deionized water volume ratio is: (24～30): (10～20): (4～8) are stirred in sealing;
3), B solution is slowly splashed in A solution, rate of addition is 5～6/min, and stir on dropping limit, limit, until the titration of B solution is complete, continues to stir 1～2min and makes slightly yellowy vitreosol, and ageing 1～2min is standby,
4), get thickness 0.5～2cm, diameter 9～11cm, the ceramic honey comb of mean pore size 1～3mm is put into chromic acid lotion and is soaked 45～60min, then put into successively dehydrated alcohol, polymer solution in water ultrasonic 20～30min respectively, use afterwards washed with de-ionized water, dry stand-by
5), the ceramic honey comb of step 4) after processing be immersed in the vitreosol that step 3 makes, and soaks 5～10min, with the speed of 2～4mm/s, lift, in 70～80 ℃ of baking 10～15min,
6) ceramic honey comb, after step 5) is processed is put into the retort furnace sintering that progressively heats up, and intensification sintering actual conditions is as follows: first by room temperature, be warming up to 110 ℃, 0.25 ℃/min of temperature rise rate; By 110 ℃, be warming up to 210 ℃ again, temperature rise rate (0.25-0.5) ℃/min; After be warming up to 500 ℃ by 210 ℃, temperature rise rate (0.5-1) ℃/min, 500 ℃ keep 3～4h, cooling, make TiO
2film.
The collocation method preparation of the preparation adoption of existing standard of above-mentioned chromic acid lotion, be the K2Cr2O7 of 20g, be dissolved in 40mL water, dense H2SO4360mL is added in K2Cr2O7 solution slowly, limit bevelling stirs with glass stick, and note not spilling, mix, cooling after, the washing lotion that packs the standby new preparation of bottle for handling liquid toilet or cosmetic substance into is sorrel, oxidation capacity is very strong, when washing lotion is with becoming long afterwards blackish green (can add solid potassium permanganate to make its regeneration), washing lotion non-oxidation washing force is described.
Advantage of the present invention is as follows:
1, pesticide waste water treatment device of the present invention, waste water enters from the bottom of reaction tube, and circular ceramic honey comb layer is positioned at the opening part of round shape reaction tube, and its upper surface flushes with reaction tube opening end, and ceramic honey comb layer upper surface is coated with TiO
2film, wastewater streams is through ceramic honey comb layer, and current are at TiO
2on film, form thinner moisture film, directly on moisture film, carry out dielectric barrier discharge, make full use of the ultraviolet producing in discharge process and carry out light-catalyzed reaction, can also produce more OH on its surface on the other hand, be conducive to the degraded of Diacloden agricultural chemicals waste water, whole system is to complete under the condition being communicated with in sealing, takes full advantage of the free radical producing in discharge process, high-energy electron and ultraviolet radiation.
2, the organism in the on the one hand independent degrading waste water of the UV-light producing in discharge process in the present invention, on the other hand at TiO
2on film, there is light-catalyzed reaction.
3, the wetting ability that the plasma body that in the present invention, discharge process produces and UV-light have increased ceramic honey comb, has reduced discharging distance, thereby forms high-density, stable plasma body.
4, in the present invention, establish an aeration pump, by the O of discharge generation
3import in waste water, oxidation agricultural chemicals waste water, the gas producing in aeration pump abstraction reaction device, as O
3, through vapor pipe, importing in wastewater trough, the organism in waste water is degraded under the effect of various free radicals, ozone and UV-light, the UV-light producing in discharge process and O
3be fully utilized, it is more even that aeration head disperses gas in waste water, increases the contact area with waste water.
5, the bottom of hollow cylindrical baffle plate of the present invention is provided with posticum apart from the top closure of reaction tube bottom 1～1.5cm and circulation tube and makes into water in reaction tube bottom homogenizing, stable on pipe sidewall, to such an extent as to can pass stably ceramic honey comb layer, at ceramic honey comb layer upper surface, form uniform and stable moisture film, guaranteed discharging distance and electric discharge continue carry out.
6, the present invention just can carry out under normal temperature, normal pressure, and reaction conditions is gentle, and controllability is strong.
7, TiO of the present invention
2the preparation method of film is simple, convenient, TiO
2cheap, nontoxic, stable, TiO
2film is to load on ceramic honey comb, is easier to recycling, compares TiO in practical application
2powder is more convenient, more saves.
Accompanying drawing explanation
Fig. 1 is the structural representation of Diacloden pesticide waste water treatment device of the present invention;
Wherein: 1, high-pressure stage; 2, earthing pole; 3, peristaltic pump; 4, aeration pump; 5, aeration head; 6, baffle plate; 7, wastewater trough; 8, venting hole; 9, reaction tube; 10, ceramic honey comb layer; 11, quartz glass layer; 12, plasma zone; 13, overflow withdrawer; 14, circulation tube; 15, wastewater effluent mouth; 16, air outlet; 17, sealing plate; 18, gas block panel; 19; Wastewater trough outlet.
Fig. 2 is TiO in the present invention
2the XRD figure of film.
Fig. 3 graphic representation to the degradation rate of Diacloden agricultural chemicals waste water that is the present invention to the degradation rate of Diacloden agricultural chemicals waste water and the wastewater treatment equipment that do not adopt ceramic honey comb layer.
Embodiment
Aeration head described in embodiment, aeration pump are prior art, aeration pump: free air delivery 80L/min, can pass through under meter coutroi velocity.Aeration head is Round Porous cylindricality, is all purchased from Shanghai Hai Li group.
Embodiment 1
A kind of radial-flow dielectric barrier discharge Diacloden pesticide waste water treatment device, structure as shown in Figure 1, comprises power supply, reactor and is arranged on the earthing pole 2 in reactor, and power supply is low-temperature plasma experimental power supply, output voltage is 0-30K, and frequency is 1KHz-100KHz.Reactor comprises reaction tube 9 and around the reaction tube outer side wall overflow withdrawer 13 of a week, reaction tube 9 is the cylinder-like structure of an end opening the other end sealing, reaction tube 9 opening parts are provided with ceramic honey comb layer 10, ceramic honey comb layer 10 is circular ceramic honey comb layer, shape and reaction tube 9 openings match, the thickness of circular ceramic honey comb layer is 1cm, diameter is 10cm, mean pore size is 2mm, the upper surface of ceramic honey comb layer 10 is concordant with reaction tube 9 opening ends, waste water enters from the bottom of reaction tube 9, the ceramic honey comb layer 10 of flowing through, at ceramic honey comb layer 10 upper surface, form moisture film.Directly over reaction tube 9 opening ends, be provided with high-pressure stage 1, the lower surface of high-pressure stage 1 is provided with medium layer, and described medium layer is circular quartz glass layer 11, and quartz glass layer 11 is 3mm with the vertical range on reaction tube opening edge edge.In reaction tube 9 bottoms, be provided with water intake, the bottom of overflow withdrawer 13 is provided with wastewater effluent mouth 15, water intake is connected by circulation tube 14 with wastewater effluent mouth 15, on the pipeline of circulation tube 14, be provided with wastewater trough 7 and peristaltic pump 3, overflow withdrawer 13 sidewalls are higher than the sidewall of reaction tube 9, the top of overflow withdrawer 13 is provided with rectangle sealing plate 17, on sealing plate 17, be provided with draw-in groove, overflow withdrawer 13 sidewall upper limbs embed in draw-in groove, high-pressure stage 1 is fixedly installed on sealing plate 17, and sealing plate 17 is PVC material.Sealing plate 17 forms enclosed construction with overflow withdrawer 13, reaction tube 9 and high-pressure stage 1 is sealed in wherein to the active substance producing in discharge process (OH, H, O, O
3) and ultraviolet radiation energy access sufficient utilization, prevent O
3diffuse to the external world, improve the degradation rate of material.Overflow withdrawer 13 side wall upper part are provided with air outlet 16, between air outlet 16 on overflow withdrawer 13 sidewalls and wastewater trough 7, be provided with vapor pipe, one end of vapor pipe is connected with air outlet 16, the other end extends in wastewater trough 7, the end, one end that vapor pipe extends in wastewater trough is connected with aeration head 5, is provided with aeration pump 4 on the pipeline of vapor pipe, preferred, aeration head 5 is positioned at the bottom of wastewater trough 7, and the top of wastewater trough 7 is provided with venting hole 8.
The internal diameter of reaction tube 9 is 11cm, and overflow withdrawer 13 is the groove shape structure around reaction tube 9 outer walls, the internal diameter 14cm of overflow withdrawer 13, wall thickness 2mm.In reaction tube 9, be also provided with baffle plate 6, the hollow cylindrical structure that baffle plate 6 is upper and lower both ends open, water intake is arranged on reaction tube 9 bottom center places, and one end of circulation tube 14 is passed water intake and is extended in open column shape baffle plate 6.The internal diameter of hollow cylindrical baffle plate 6 is 4mm, height is 5cm, the bottom of hollow cylindrical baffle plate 6 is apart from reaction tube bottom 1.5cm, one end of circulation tube 14 is through water intake and be positioned at hollow cylindrical baffle plate 6 horizontal section middle positions, the top closure of circulation tube 14, irises out water hole apart from being provided with one on circulation tube 14 sidewalls of top 0.5～1cm.The bottom of hollow cylindrical baffle plate is provided with posticum apart from the top closure of reaction tube bottom 1.5cm and circulation tube and makes into water in reaction tube bottom homogenizing, stable on pipe sidewall, to such an extent as to can pass stably ceramic honey comb layer, at ceramic honey comb layer upper surface, form uniform and stable moisture film, guaranteed discharging distance and electric discharge continue carry out.
In wastewater trough 7, be provided with the gas block panel 18 perpendicular to wastewater trough bottom, gas block panel 18 is rectangular flat plate, and gas block panel 18 separates aeration head 5 and the wastewater trough outlet 19 of wastewater trough bottom, to prevent that gas from entering in round shape reaction tube 9.
Waste water enters reaction tube from the bottom water intake of reaction tube 9, along reaction tube bottom, upwards flow, the flow through ceramic honey comb layer 10 of reaction tube opening end, at ceramic honey comb layer 10 upper surface, form moisture film, by edge, mediad surrounding, flowed, open after low-temperature plasma experimental power supply, high-pressure stage 1 starts electric discharge, between quartz glass layer 11 and ceramic honey comb layer 10, form plasma zone 12, the moisture film of ceramic honey comb layer 10 upper surface is degraded on the one hand under the effect of various free radicals, gas, especially O that discharge process produces
3through aeration pump 4, be imported in waste water, the organism in waste water is by O
3oxidation, thus removed.Residual gas in waste water is discharged through exhaust apertures 8.Waste water adopts the mode of circular treatment, and the waste water after processing overflows and flows into overflow withdrawer from the reaction tube ceramic honey comb layer 10 of flowing through, by wastewater effluent mouth, flow in wastewater trough, then by water pump in water intake enters reaction tube.
Embodiment 2
With the radial-flow dielectric barrier discharge Diacloden pesticide waste water treatment device described in embodiment 1, difference is:
The thickness of circular ceramic honey comb layer is 1.5cm, and ceramic honey comb layer 10 upper surface are coated with TiO
2film, the internal diameter of cylindric reaction tube is 12cm, the internal diameter 16cm of overflow withdrawer, wall thickness is 1mm.The internal diameter of hollow cylindrical baffle plate is 2mm, and height is 3cm, and the bottom of hollow cylindrical baffle plate is apart from reaction tube bottom 1cm,
Quartz glass layer 11 is 2mm with the vertical range on reaction tube opening edge edge.By applying TiO at ceramic honey comb layer 10 upper surface
2film and uncoated TiO
2film is tested (the results are shown in Figure 3) to the degrade effect of Diacloden waste water of the present invention, and during degradation treatment 180min, ceramic honey comb layer 10 upper surface apply TiO
2the device of film reaches 92.74% to the degradation rate of Diacloden waste water, the uncoated TiO of ceramic honey comb layer 10 upper surface
2the device of film reaches 88.14% to the degradation rate of Diacloden waste water, by finding out in figure, does not establish the device of ceramic honey comb layer 10 because of minimum to the degradation rate of Diacloden waste water, therefore at ceramic honey comb layer 10 upper surface, applies TiO
2the device of film is considerable to the degradation effect containing this agricultural chemicals waste water of Diacloden.
Embodiment 3
With TiO in the radial-flow dielectric barrier discharge Diacloden pesticide waste water treatment device described in embodiment 2
2the preparation method of film, comprises that step is as follows:
1), the configuration of A solution: get tetrabutyl titanate and mix with dehydrated alcohol, stir, after 8min, slowly add anhydrous acetic acid, sealing, continue to stir after 30min standing, described tetrabutyl titanate: dehydrated alcohol: anhydrous acetic acid volume ratio is: 12:48:5;
2), the configuration of B solution: get dehydrated alcohol and mix with anhydrous acetic acid, add deionized water, 25min, described dehydrated alcohol: anhydrous acetic acid: deionized water volume ratio is: 24:10:4 are stirred in sealing;
3), B solution is slowly splashed in A solution, rate of addition is 5～6/min, and stir on dropping limit, limit, until the titration of B solution is complete, continues to stir 2min and makes slightly yellowy vitreosol, and ageing 2min is standby,
4), get thickness 1cm, diameter 10cm, the ceramic honey comb of mean pore size 2mm is put into chromic acid lotion and is soaked 45min, then puts into successively dehydrated alcohol, polymer solution in water ultrasonic 30min respectively, uses afterwards washed with de-ionized water, dry stand-by,
5), the ceramic honey comb of step 4) after processing be immersed in the vitreosol that step 3 makes, and soaks 10min, with the speed of 4mm/s, lift, in 80 ℃ of baking 10min,
6) ceramic honey comb, after step 5) is processed is put into the retort furnace sintering that progressively heats up, and intensification sintering actual conditions is as follows: first by room temperature, be warming up to 110 ℃, 0.25 ℃/min of temperature rise rate; By 110 ℃, be warming up to 210 ℃ again, 0.25 ℃/min of temperature rise rate; After be warming up to 500 ℃ by 210 ℃, 0.5 ℃/min of temperature rise rate, 500 ℃ keep 4h, cooling, make TiO
2film.
TiO in the present invention
2shown in film XRD figure (Fig. 2), TiO of the present invention
2film is to load on ceramic honey comb, is easier to recycling, compares TiO in practical application
2powder is more convenient, more save, and preparation method is feasible.
Embodiment 4
With TiO in the radial-flow dielectric barrier discharge Diacloden pesticide waste water treatment device described in embodiment 2
2the preparation method of film, comprises that step is as follows:
1), the configuration of A solution: get tetrabutyl titanate and mix with dehydrated alcohol, stir, after 10min, slowly add anhydrous acetic acid, sealing, continue to stir after 35min standing, described tetrabutyl titanate: dehydrated alcohol: anhydrous acetic acid volume ratio is: 15:50:8;
2), the configuration of B solution: get dehydrated alcohol and mix with anhydrous acetic acid, add deionized water, 30min, described dehydrated alcohol: anhydrous acetic acid: deionized water volume ratio is: 30:20:8 are stirred in sealing;
3), B solution is slowly splashed in A solution, rate of addition is 5～6/min, and stir on dropping limit, limit, until the titration of B solution is complete, continues to stir 2min and makes slightly yellowy vitreosol, and ageing 2min is standby,
4), get thickness 1.5cm, diameter 10cm, the ceramic honey comb of mean pore size 2mm is put into chromic acid lotion and is soaked 50min, then puts into successively dehydrated alcohol, polymer solution in water ultrasonic 25min respectively, uses afterwards washed with de-ionized water, dry stand-by,
5), the ceramic honey comb of step 4) after processing be immersed in the vitreosol that step 3 makes, and soaks 5min, with the speed of 3mm/s, lift, in 75 ℃ of baking 15min,
6) ceramic honey comb, after step 5) is processed is put into the retort furnace sintering that progressively heats up, and intensification sintering actual conditions is as follows: first by room temperature, be warming up to 110 ℃, 0.25 ℃/min of temperature rise rate; By 110 ℃, be warming up to 210 ℃ again, 0.5 ℃/min of temperature rise rate; After be warming up to 500 ℃ by 210 ℃, 1 ℃/min of temperature rise rate, 500 ℃ keep 3h, cooling, make TiO
2film.
Claims (3)
1. a radial-flow dielectric barrier discharge Diacloden pesticide waste water treatment device, comprise power supply, reactor and be arranged on the earthing pole in reactor, described reactor comprises reaction tube and around the reaction tube outer side wall overflow withdrawer of a week, described reaction tube is the cylinder-like structure of an end opening the other end sealing, directly over reaction tube opening end, be provided with high-pressure stage, it is characterized in that, the lower surface of high-pressure stage is provided with medium layer, in reaction tube bottom, be provided with water intake, the bottom of overflow withdrawer is provided with wastewater effluent mouth, described water intake is connected by circulation tube with wastewater effluent mouth, on the pipeline of circulation tube, be provided with wastewater trough and peristaltic pump, described overflow withdrawer sidewall is higher than the sidewall of reaction tube and in top closure, overflow withdrawer side wall upper part is provided with air outlet, between air outlet on overflow withdrawer sidewall and wastewater trough, be provided with vapor pipe, one end of vapor pipe is connected with air outlet, the other end extends in wastewater trough, the top of wastewater trough is provided with venting hole, described reaction tube opening end is provided with circular ceramic honey comb layer, shape and reaction tube opening match, the thickness of described circular ceramic honey comb layer is 0.5～2cm, diameter is 9～11cm, mean pore size is 1～3mm, the upper surface of ceramic honey comb layer is concordant with reaction tube opening end, and ceramic honey comb layer upper surface is coated with TiO
2film, in described reaction tube, be also provided with baffle plate, described baffle plate is the hollow cylindrical structure of upper and lower both ends open, water intake is arranged on the bottom center place in reaction tube, one end of circulation tube is passed water intake and is extended in hollow cylindrical baffle plate, the internal diameter of hollow cylindrical baffle plate is 2～6mm, height is 3～5cm, the bottom of hollow cylindrical baffle plate is apart from reaction tube bottom 1～1.5cm, one end of circulation tube is through water intake and be positioned at hollow cylindrical baffle plate horizontal section middle position, the top closure of described circulation tube, apart from being provided with one on the circulation tube sidewall of top 0.5～1cm, iris out water hole, the top of described overflow withdrawer is rectangle sealing plate, on sealing plate, be provided with draw-in groove, overflow withdrawer sidewall upper limb embeds in draw-in groove, high-pressure stage is fixedly installed on sealing plate, sealing plate is PVC material, in described wastewater trough, be provided with the gas block panel perpendicular to wastewater trough bottom, described gas block panel is rectangular flat plate, the end, one end that vapor pipe extends in wastewater trough is connected with aeration head, on the pipeline of vapor pipe, be provided with aeration pump, aeration head is positioned at the bottom of wastewater trough, gas block panel separates the wastewater trough outlet of aeration head and wastewater trough bottom.
2. radial-flow dielectric barrier discharge Diacloden pesticide waste water treatment device according to claim 1, it is characterized in that, the internal diameter of described cylindric reaction tube is 10～12cm, described overflow withdrawer is the groove shape structure around reaction tube outer wall, internal diameter 14～the 16cm of overflow withdrawer, wall thickness is 1～2mm.
3. radial-flow dielectric barrier discharge Diacloden pesticide waste water treatment device according to claim 1, is characterized in that, described medium layer is circular quartz glass layer, and the vertical range at medium layer and reaction tube opening end edge is 2～4mm.
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