CN103159287A - 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 the sewage water-treatment technology field.
Background technology
China is pesticide producing big country, nearly 2000 of pesticide producing enterprise, and the pesticide producing amount occupies prostatitis, the world.And the pesticide producing process will be brought a large amount of agricultural chemicals waste waters, this class waste water has the characteristics 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 the 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, the 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, more is conducive to organic degraded.After reactor electrodes adds 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, catalyzer TiO simultaneously
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, the high-pressure stage lower surface is provided with medium layer, also comprise reactor, reactor comprises reaction tube, the overflow withdrawer, water intake and wastewater effluent mouth, the open column shape structure that reaction tube is 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 the 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, the 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 the opening setting, the UV-light produced 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 the earthing pole be arranged in reactor, described reactor comprises reaction tube and around the reaction tube outer side wall overflow withdrawer of a week, the cylinder-like structure that described reaction tube is an end opening the other end sealing, be provided with high-pressure stage directly over the reaction tube opening end, the lower surface of high-pressure stage is provided with medium layer, be provided with water intake in the reaction tube bottom, the bottom of overflow withdrawer is provided with the wastewater effluent mouth, described water intake is connected by circulation tube with the wastewater effluent mouth, be provided with wastewater trough and peristaltic pump on the pipeline of circulation tube, 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, be provided with vapor pipe between air outlet on overflow withdrawer sidewall and wastewater trough, 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 the ceramic honey comb layer, further preferred, described ceramic honey comb layer is circular ceramic honey comb layer, and shape and reaction tube opening are complementary, 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 the 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 the reaction tube opening end, and wastewater streams is through the ceramic honey comb layer, form moisture film at the ceramic honey comb upper surface, ceramic honey comb layer upper surface is coated with TiO
2film, take full advantage of the ultraviolet produced in discharge process and carry 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 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 produced 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 produced 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 the reaction tube outer wall, the internal diameter 14～16cm of overflow withdrawer, and wall thickness is 1～2mm.
Also be provided with baffle plate in described reaction tube, 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 an end of circulation tube passes water intake and extends in the 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, iris 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 the pipe sidewall, to such an extent as to can pass stably the ceramic honey comb layer, form uniform and stable moisture film at ceramic honey comb layer upper surface, guaranteed discharging distance and electric discharge continue carry out.
The top of described overflow withdrawer is the 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 the overflow withdrawer, reaction tube and high-pressure stage is sealed in wherein to the active substance produced 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 the 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 gas, enters in the round shape reaction tube.
Described sealing plate is the PVC material.
Described power supply is the 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, slowly add anhydrous acetic acid after 5～10min, sealing, standing after continuation stirring 30～40min, described tetrabutyl titanate: dehydrated alcohol: the 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 is stirred in sealing, and described dehydrated alcohol: anhydrous acetic acid: the deionized water volume ratio is: (24～30): (10～20): (4～8);
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, lifted, in 70～80 ℃ of baking 10～15min,
6), the ceramic honey comb after step 5) is processed puts into the retort furnace sintering that progressively heats up, intensification sintering actual conditions is as follows: first be warming up to 110 ℃ by room temperature, 0.25 ℃/min of temperature rise rate; Be warming up to 210 ℃ by 110 ℃ 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, the limit bevelling stirs with glass stick, and note not spilling, mix, cooling after, the washing lotion of the standby new preparation of bottle for handling liquid toilet or cosmetic substance of packing into is sorrel, oxidation capacity is very strong, when washing lotion, 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 the reaction tube opening end, and ceramic honey comb layer upper surface is coated with TiO
2film, wastewater streams is through the ceramic honey comb layer, and current are at TiO
2form thinner moisture film on film, directly on moisture film, carry out dielectric barrier discharge, take full advantage of the ultraviolet produced 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 be communicated with in sealing, takes full advantage of the free radical produced 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 produced in discharge process in the present invention, on the other hand at TiO
2light-catalyzed reaction occurs on film.
3, the wetting ability that the plasma body that in the present invention, discharge process produces and UV-light have increased ceramic honey comb, reduced discharging distance, thereby form high-density, stable plasma body.
4, establish an aeration pump in the present invention, by the O of discharge generation
3import in waste water, the oxidation agricultural chemicals waste water, the gas produced 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 produced 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 the pipe sidewall, to such an extent as to can pass stably the ceramic honey comb layer, form uniform and stable moisture film at ceramic honey comb layer upper surface, guaranteed discharging distance and electric discharge continue carry out.
6, the present invention just can carry out under normal temperature, normal pressure, the reaction conditions gentleness, 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.
The accompanying drawing explanation
The structural representation that Fig. 1 is 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; The wastewater trough outlet.
Fig. 2 is TiO in the present invention
2the XRD figure of film.
Fig. 3 is that the present invention is to the degradation rate of Diacloden agricultural chemicals waste water and do not adopt the graphic representation of the wastewater treatment equipment of ceramic honey comb layer to the degradation rate of Diacloden agricultural chemicals waste water.
Embodiment
Aeration head described in embodiment, aeration pump are prior art, aeration pump: free air delivery 80L/min, can pass through the under meter coutroi velocity.Aeration head is the Round Porous cylindricality, all is 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 the 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, the cylinder-like structure that reaction tube 9 is 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 are complementary, 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, form moisture film at ceramic honey comb layer 10 upper surface.Be provided with high-pressure stage 1 directly over reaction tube 9 opening ends, 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.Be provided with water intake in reaction tube 9 bottoms, 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, be provided with wastewater trough 7 and peristaltic pump 3 on the pipeline of circulation tube 14, 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, be provided with draw-in groove on sealing plate 17, 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 the 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 produced 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, be provided with vapor pipe between air outlet 16 on overflow withdrawer 13 sidewalls and wastewater trough 7, one end of vapor pipe is connected with air outlet 16, the other end extends in wastewater trough 7, the end 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.Also be provided with baffle plate 6 in reaction tube 9, 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 an end of circulation tube 14 passes water intake and extends 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, iris 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 the pipe sidewall, to such an extent as to can pass stably the ceramic honey comb layer, form uniform and stable moisture film at ceramic honey comb layer upper surface, guaranteed discharging distance and electric discharge continue carry out.
Be provided with the gas block panel 18 perpendicular to the wastewater trough bottom in wastewater trough 7, 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 gas, enters in round shape reaction tube 9.
Waste water enters reaction tube from the bottom water intake of reaction tube 9, along the reaction tube bottom, upwards flow, the flow through ceramic honey comb layer 10 of reaction tube opening end, form moisture film at ceramic honey comb layer 10 upper surface, by edge, mediad surrounding, flowed, after opening the low-temperature plasma experimental power supply, high-pressure stage 1 starts electric discharge, form plasma zone 12 between quartz glass layer 11 and ceramic honey comb layer 10, 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 the overflow withdrawer from the reaction tube ceramic honey comb layer 10 of flowing through, by the wastewater effluent mouth, flow in wastewater trough, then by water pump in water intake enters reaction tube.
With the described radial-flow dielectric barrier discharge of embodiment 1 Diacloden pesticide waste water treatment device, 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 at ceramic honey comb layer 10 upper surface, applying TiO
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, and by finding out in figure, the device of not establishing ceramic honey comb layer 10 is minimum because of the degradation rate to 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 described radial-flow dielectric barrier discharge of embodiment 2 Diacloden pesticide waste water treatment device
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, slowly add anhydrous acetic acid after 8min, seal, standing after continuation stirring 30min, described tetrabutyl titanate: dehydrated alcohol: the 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 is stirred in sealing, and described dehydrated alcohol: anhydrous acetic acid: the deionized water volume ratio is: 24:10:4;
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, lifted, in 80 ℃ of baking 10min,
6), the ceramic honey comb after step 5) is processed puts into the retort furnace sintering that progressively heats up, intensification sintering actual conditions is as follows: first be warming up to 110 ℃ by room temperature, 0.25 ℃/min of temperature rise rate; Be warming up to 210 ℃ by 110 ℃ 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 the preparation method is feasible.
Embodiment 4
With TiO in the described radial-flow dielectric barrier discharge of embodiment 2 Diacloden pesticide waste water treatment device
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, slowly add anhydrous acetic acid after 10min, seal, standing after continuation stirring 35min, described tetrabutyl titanate: dehydrated alcohol: the 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 is stirred in sealing, and described dehydrated alcohol: anhydrous acetic acid: the deionized water volume ratio is: 30:20:8;
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, lifted, in 75 ℃ of baking 15min,
6), the ceramic honey comb after step 5) is processed puts into the retort furnace sintering that progressively heats up, intensification sintering actual conditions is as follows: first be warming up to 110 ℃ by room temperature, 0.25 ℃/min of temperature rise rate; Be warming up to 210 ℃ by 110 ℃ 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 (10)
1. a radial-flow dielectric barrier discharge Diacloden pesticide waste water treatment device, comprise power supply, reactor and the earthing pole be arranged in reactor, described reactor comprises reaction tube and around the reaction tube outer side wall overflow withdrawer of a week, the cylinder-like structure that described reaction tube is an end opening the other end sealing, be provided with high-pressure stage directly over the reaction tube opening end, it is characterized in that, the lower surface of high-pressure stage is provided with medium layer, be provided with water intake in the reaction tube bottom, the bottom of overflow withdrawer is provided with the wastewater effluent mouth, described water intake is connected by circulation tube with the wastewater effluent mouth, be provided with wastewater trough and peristaltic pump on the pipeline of circulation tube, 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, be provided with vapor pipe between air outlet on overflow withdrawer sidewall and wastewater trough, 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.
2. radial-flow dielectric barrier discharge Diacloden pesticide waste water treatment device according to claim 1, it is characterized in that, described reaction tube opening part is provided with the ceramic honey comb layer, further preferred, described ceramic honey comb layer is circular ceramic honey comb layer, shape and reaction tube opening are complementary, 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 the reaction tube opening end, and ceramic honey comb layer upper surface is coated with TiO
2film.
3. radial-flow dielectric barrier discharge Diacloden pesticide waste water treatment device according to claim 1, it is characterized in that, the end end that described vapor pipe extends in wastewater trough is connected with aeration head, be provided with aeration pump on the pipeline of vapor pipe, preferably, aeration head is positioned at the bottom of wastewater trough.
4. 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 the reaction tube outer wall, internal diameter 14～the 16cm of overflow withdrawer, wall thickness is 1～2mm.
5. according to the described arbitrary radial-flow dielectric barrier discharge Diacloden pesticide waste water treatment device of claim 1-4, it is characterized in that, also be provided with baffle plate in described reaction tube, 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 an end of circulation tube passes water intake and extends in the open column shape baffle plate.
6. radial-flow dielectric barrier discharge Diacloden pesticide waste water treatment device according to claim 5, it is characterized in that, 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 be positioned at hollow cylindrical baffle plate horizontal section middle position, and the top closure of described circulation tube is irised out water hole apart from being provided with one on the circulation tube sidewall of top 0.5～1cm.
7. radial-flow dielectric barrier discharge Diacloden pesticide waste water treatment device according to claim 1, it is characterized in that, the top of described overflow withdrawer is the rectangle sealing plate, be provided with draw-in groove on sealing plate, overflow withdrawer sidewall upper limb embeds in draw-in groove, high-pressure stage is fixedly installed on sealing plate, and sealing plate is the PVC material.
8. according to the described arbitrary radial-flow dielectric barrier discharge Diacloden pesticide waste water treatment device of claim 1-4, it is characterized in that, described medium layer is circular quartz glass layer, and the vertical range on medium layer and reaction tube opening edge edge is 2～4mm.
9. according to the described arbitrary radial-flow dielectric barrier discharge Diacloden pesticide waste water treatment device of claim 1-4, it is characterized in that, be provided with the gas block panel perpendicular to the 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.
10. TiO in a radial-flow dielectric barrier discharge Diacloden pesticide waste water treatment device claimed in claim 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, slowly add anhydrous acetic acid after 5～10min, sealing, standing after continuation stirring 30～40min, described tetrabutyl titanate: dehydrated alcohol: the 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 is stirred in sealing, and described dehydrated alcohol: anhydrous acetic acid: the deionized water volume ratio is: (24～30): (10～20): (4～8);
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, lifted, in 70～80 ℃ of baking 10～15min,
6), the ceramic honey comb after step 5) is processed puts into the retort furnace sintering that progressively heats up, intensification sintering actual conditions is as follows: first be warming up to 110 ℃ by room temperature, 0.25 ℃/min of temperature rise rate; Be warming up to 210 ℃ by 110 ℃ 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.
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