CN204569526U - A kind of catalysis advanced oxidation sewage sludge treatment facility - Google Patents
A kind of catalysis advanced oxidation sewage sludge treatment facility Download PDFInfo
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- CN204569526U CN204569526U CN201520202589.3U CN201520202589U CN204569526U CN 204569526 U CN204569526 U CN 204569526U CN 201520202589 U CN201520202589 U CN 201520202589U CN 204569526 U CN204569526 U CN 204569526U
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Abstract
A kind of catalysis advanced oxidation sewage sludge treatment facility, comprises shell, UV projector, outlet, import, electrolysis reactor, anode and direct supply; Described anode is drum, and anode is cased, and the center line conllinear of the axis of anode and shell; The material of shell is conductor; The material of anode is titanium; Shell and anode are connected the output terminal of direct supply respectively, make shell form negative electrode; Cavity between anode and negative electrode forms reaction chamber; Described electrolysis reactor is arranged in reaction chamber; UV projector is contained on shell, irradiation ultraviolet radiation in the middle part of reaction chamber; Import and outlet are all contained on shell; Described electrolysis reactor is the catalyzer of transparent insulation housing filling; This catalyzer is supported titanium oxide active charcoal; Transparent shell is densely covered with through hole.
Description
Technical field
The invention belongs to environmental technology field, specifically a kind of catalysis advanced oxidation sewage sludge treatment facility.
Background technology
Modern industry particularly chemical industry produces a large amount of sewage and mud every year, these pollutents have suitable quantity directly to enter in physical environment, serious threat environmental health and human survival, along with society is to environmental issue pay attention to day by day, how more effectively to dispose of sewage and mud becomes an important research topic.The treatment process that current sewage is conventional is Physical, biological process and chemical method, wherein, Physical has the methods such as gravity separation, filtration, evaporative crystallization and physics adjustment, except floating matter, the suspended substance and greasy dirt etc. of decontaminated water, be separated the non-solubility material in sewage, but can not chemical property be changed in treating processes; Biological process utilizes the metabolic function of microorganism, the organic substance decomposing in sewage being dissolving or colloidal state is oxidized to stable inorganic substance, sewage is purified, and conventional has activated sludge process and biomembrance process, and Biochemical method degree is higher than Physical; Chemical method utilizes chemical reaction to be used for processing or reclaiming the dissolved substance of sewage or the method for colloidalmaterial, be used for trade effluent, conventional has Coagulation Method, neutralisation, oxidation reduction process, ion exchange method etc., method of chemical treatment treatment effect is good, costly, multiplexly further process the water outlet after biochemical treatment, improve effluent quality.
For the process of mud, often adopt landfill, burning, the method such as agricultural, but containing a large amount of chemical substances in chemical engineering sludge, directly adopting aforesaid method to pollute the environment, is the behavior prohibited.Chemical engineering sludge generally adopts the methods such as microorganism predation, thermal hydrolysis, endogenous metabolism, but general processing cost is too high.
Summary of the invention
In order to solve problems of the prior art, the invention proposes a kind of advanced oxidation pollution treatment technology and equipment, specific as follows:
A kind of advanced oxidation pollution treatment technology, adopts electrolytic catalysis method to obtain hydroxyl radical free radical, carries out oxidation pollution treatment by hydroxyl radical free radical to sewage/mud;
The preparation method of described hydroxyl radical free radical is:
Use titanium as anode, stainless steel is as negative electrode, and sewage/mud is as solution; Anode and negative electrode external direct current power supply, obtain bath voltage between the anode and cathode; Reaction chamber is formed between anode and negative electrode; The gac adding supported titanium oxide compound is placed in reaction chamber as catalyzer, meanwhile, to reaction chamber internal radiation ultraviolet, obtained hydroxyl radical free radical; Sewage/mud is placed in reaction chamber as solution medium, carries out pollution treatment process with obtained hydroxyl radical free radical;
The method of the generation of described hydroxyl radical free radical comprises:
A, the ph value of sewage/mud is transferred to 8 ~ 9 values in advance, under the effect of bath voltage, there is electrolytic reaction on the surface of gac in gac and the titanium oxide forming reactions electric current of load on its surface;
Because titanium oxide is semi-conductor, have " hole " effect in the electric field, there is the ability of powerful attraction electronics, make water molecules in sewage/mud and hydroxide ion under the catalysis of titanium oxide, lose an electronics, generate hydroxyl radical free radical;
B, under ultraviolet effect, there is catalysis photoresponse in the surface of titanium oxide, makes water molecules and hydroxide ion generate hydroxyl radical free radical by hole reaction;
In c, hole reaction process, the electronics that water molecules and hydroxide ion lose can with oxygen generation electron reaction, produce hydroxyl radical free radical;
Hole is reacted:
Electron reaction:
O
2+e
—→·O
2 —
H
2O+·O
2 —→·OOH+OH
—
2·OOH→O
2+H
2O
2
·OOH+H
2O+e
—→OH
—+H
2O
2
H
2O
2+e
—→·OH+OH
—
Under the effect of bath voltage, much more extremely titanium oxide at the surperficial quantity of formation microelectrode of gac, gac itself has adsorptive power, by the Adsorption of Organic in sewage/mud on its surface, microelectrode generates hydroxyl radical free radical near titanium oxide, redox reaction is produced to the organism being adsorbed on activated carbon surface, makes organic matter degradation.
Described titanium oxide is Nano titanium dioxide.Bath voltage is 15V ~ 20V.
The preparation method of supported titanium oxide active Pd/carbon catalyst is:
First TiOSO
4the aqueous solution, urea and gac mix, and constantly stir; TiOSO
4the aqueous solution and urea generate uniform TiO (OH)
2precipitation, the TiO (OH) that charcoal absorption generates
2precipitation;
After having reacted, TiO (OH) will be adsorbed
2gac take out, under 70 DEG C ~ 90 DEG C conditions, dry 10h ~ 12h; Put into retort furnace again at 450 DEG C ~ 500 DEG C calcining 2h ~ 2.5h, take out, obtained carried titanium dioxide gac; Obtained titanium dioxide particle diameter is 10 ~ 20nm;
Described gac is columnar structure gac, granularity
Realize a catalysis advanced oxidation sewage sludge treatment facility for aforesaid method, comprise shell, UV projector, outlet, import, electrolysis reactor, anode and direct supply;
Described anode is drum, and anode is cased, and the center line conllinear of the axis of anode and shell; The material of shell is conductor; The material of anode is titanium; Shell and anode are connected the output terminal of direct supply respectively, make shell form negative electrode; Cavity between anode and negative electrode forms reaction chamber; Described electrolysis reactor is arranged in reaction chamber;
UV projector is contained on shell, irradiation ultraviolet radiation in the middle part of reaction chamber; Import and outlet are all contained on shell;
Described electrolysis reactor is the catalyzer of transparent insulation housing filling; This catalyzer is supported titanium oxide active charcoal; Transparent shell is densely covered with through hole.
Arbitrary radial section of the housing of described electrolysis reactor is toroidal, and its center of circle is on the axis of drum anode;
Charging opening and the discharge opening of catalyzer is respectively equipped with at the housing upper of electrolysis reactor and bottom.
The housing wall of described electrolysis reactor evenly gathers through hole, the density 15 ~ 25in of through hole
2, aperture 0.5 ~ 1mm.
The material of described shell is stainless material.
Described UV projector has multiple, and they are in a center of symmetry around the anode of drum.
Accompanying drawing explanation
Fig. 1 is the main sectional view of this reactor;
Fig. 2 is the vertical view of this reactor;
In figure: shell 1, UV projector 2, outlet 3, electrolysis reactor 4, charging opening 5, anode 6, import 7, discharge opening 8.
Embodiment
This reactor design thinking:
Hydroxyl radical free radical is the most active a kind of bioactive molecule, also be one of chemical substance that offensiveness is the strongest, almost can there is various dissimilar chemical reaction with all biomacromolecules, organism or inorganics in it, and have very high reaction rate constant and the Electron Affinities of negative charge.Hydroxyl radical free radical has following advantage as oxide process sewage:
1, oxidation capacity is strong.The standard potential of hydroxyl radical free radical is 2.8V, oxidation capacity is as all stronger in ozone, chlorine, hydrogen peroxide than common oxygenant, is only second to fluorine, therefore, it is possible to the organic substance being difficult to oxidize away with common oxidizer reacts, these oxidation operations are degraded, thus reaches the object of organics removal.
2, hydroxyl radical free radical and the organism selectivity of reacting is very little, almost can react with all organism in water, and speed of response is fast, can reach 10
9m
?1s
?1, substantially close to the boundary that rate of diffusion controls, oxidation rate is determined by the generation speed of hydroxyl radical free radical, therefore can reach ideal effect in very short time with during hydroxyl radical free radical degradation of organic substances.
3, organism can be fully and completely oxidized to carbonic acid gas and water by hydroxyl radical free radical, and efficiency is very high.Oxidation operation can not be become carbonic acid gas and water by common oxygenant, and can generate some harmful intermediate products, as aldehyde, ketone and carboxylic acid, can cause secondary pollution.
4, both can individual curing, also can with other treating processess with the use of, thus improve effect.
The principle of design of the invention is: for chemical method sewage treating processes, the important factor that the extremely strong hydroxyl radical free radical (OH) of oxidisability is treating processes.For sludge treatment, due in chemical sludge containing large amount of organic, be carbonic acid gas and water by hydroxyl radical free radical (OH) by its oxidation operation, thus reach the object of decrement.This concrete engineering realizes adopting this catalysis advanced oxidation sewage sludge treatment facility, catalyzed reaction can generate hydroxyl radical free radical.Specific as follows:
With reference to accompanying drawing 1,2, the catalysis advanced oxidation sewage sludge treatment facility in this example, it uses titanium as anode, and stainless steel is as negative electrode, and sewage (mud) is as solution medium, and anode and negative electrode external source, form bath voltage between the anode and cathode.Add the carbon material of supporting nanostructures titanium oxide between anode and negative electrode as catalyzer, the inwall of producer arranges UV projector.
Carbon material selects gac as anode, because gac specific surface area is large, and porous, be easy to the metal oxide adhering to nanostructure, gac has good absorption property simultaneously, selects the columnar structure gac that particle is larger, granularity
(in this example, selecting 6mm).Titanium material is owing to having nanostructure, so prepared by employing following methods:
The preparation process of supported titanium oxide active Pd/carbon catalyst, in order to realize the maximization of catalytic efficiency, the method of utilize titanium solution to mix with gac, to adsorb, drying prepares nano level titanium oxide, and nano grade titanium oxide compound has very large specific surface area, and therefore catalytic effect is excellent.Preparation process utilizes titanyl sulfate TiOSO
4be main raw material with gac, first utilize TiOSO
4the aqueous solution, urea and gac mix, and constantly stir, TiOSO
4the aqueous solution and urea generate uniform TiO (OH)
2precipitation, the TiO (OH) that charcoal absorption generates
2precipitation, after having reacted, will adsorb TiO (OH)
2gac take out, 10h ~ 12h (this example is 12h) is dried under 70 DEG C ~ 90 DEG C (this example is 83 ± 3 DEG C) conditions, put into retort furnace 450 DEG C ~ 500 DEG C (this example controls at 280 ± 10 DEG C) calcining 2h ~ 2.5h (this example is 2.3h), take out, obtained carried titanium dioxide gac, obtained titanium dioxide particle diameter is 10 ~ 20nm, belongs to nanostructure.
Hydroxyl radical free radical produces by following process:
Solution being modulated certain pH value (is 8 ~ 9 in this example, weakly alkaline), under the effect of bath voltage, the titanium oxide forming reactions electric current on gac and its surface of load, electrolytic reaction is there is on the surface of gac, because titanium oxide is semi-conductor, there is special outer electronic structure, have " hole " effect in the electric field, it has the ability of powerful attraction electronics, make water molecules in sewage (mud) and hydroxide ion under the catalysis of semiconductor titanium oxide compound, lose an electronics, thus generate hydroxyl radical free radical.
Under ultraviolet effect, there is catalysis photoresponse on the surface of semiconductor material titanium oxide, make water molecules and hydroxide ion generate hydroxyl radical free radical by hole reaction.
The electronics that hole reaction process water molecules and hydroxide ion lose can react with oxygen generation sophisticated electronic, also can produce hydroxyl radical free radical.
Hole is reacted:
Electron reaction:
O
2+e
—→·O
2 —
H
2O+·O
2 —→·OOH+OH
—
2·OOH→O
2+H
2O
2
·OOH+H
2O+e
—→OH
—+H
2O
2
H
2O
2+e
—→·OH+OH
—
Under the effect of bath voltage, much more extremely nano titanium oxide at the surperficial quantity of formation microelectrode of gac, gac itself has adsorptive power, can by the Adsorption of Organic in sewage (mud) on its surface, microelectrode generates hydroxyl radical free radical near nano titanium oxide, redox reaction is produced to the organism being adsorbed on activated carbon surface, makes organic matter degradation.Titanium dioxide and gac consumption in reaction process is very low, can use lastingly.
Bath voltage is the motivating force of electrolytic reaction, and bath voltage larger reflection effect is more obvious, but voltage crosses conference initiation side reaction, and therefore consider economic benefit, result of use, personnel safety, bath voltage 15V ~ 20V is proper.
As shown in the figure: shell 1 is stainless material, connect external power, as negative electrode, anode 6 titanium material is made, and connects external power, as anode, forms the bath voltage of certain numerical value between 1 and 6, as the motivating force of electrolytic catalysis reaction.Electrolysis reactor 4 outer wall is made up of hard transparent PVC material, wall thickness 2.5-4mm (this example is 3.2mm), and outer wall has uniform pore, aperture 0.5-1mm (this example is 0.6mm), hole density 15-25in
2(this example is 23in
2).Electrolysis reactor adds load nano-titanium dioxide activated-carbon catalyst wherein by charging opening 5, catalyzer can draw off by discharge opening 8, catalyzer is in electrolysis reactor, under launching ultraviolet driving by bath voltage and UV projector, generate hydroxyl radical free radical and act on sewage (mud).
The effect of this reactor is described as follows:
Use this device to process the difficult waste water of industrial circle, the parameters such as the organic content before and after recording processing and COD, as following table:
As can be seen from the table, this device is high for the organic removal rate in waste water, and process required time is shorter, advanced oxidation Be very effective.To the clearance of COD because the difference of pollutant component in water is slightly distinguished, overall clearance is higher.
Claims (5)
1. a catalysis advanced oxidation sewage sludge treatment facility, is characterized in that comprising shell, UV projector, outlet, import, electrolysis reactor, anode and direct supply;
Described anode is drum, and anode is cased, and the center line conllinear of the axis of anode and shell; The material of shell is conductor; The material of anode is titanium; Shell and anode are connected the output terminal of direct supply respectively, make shell form negative electrode; Cavity between anode and negative electrode forms reaction chamber; Described electrolysis reactor is arranged in reaction chamber;
UV projector is contained on shell, irradiation ultraviolet radiation in the middle part of reaction chamber; Import and outlet are all contained on shell;
Described electrolysis reactor is the catalyzer of transparent insulation housing filling; This catalyzer is supported titanium oxide active charcoal; Transparent shell is densely covered with through hole.
2. catalysis advanced oxidation sewage sludge treatment facility according to claim 1, it is characterized in that arbitrary radial section of the housing of described electrolysis reactor is toroidal, and its center of circle is on the axis of drum anode;
Charging opening and the discharge opening of catalyzer is respectively equipped with at the housing upper of electrolysis reactor and bottom.
3. catalysis advanced oxidation sewage sludge treatment facility according to claim 1, the housing wall that it is characterized in that described electrolysis reactor evenly gathers through hole, the density 15 ~ 25in of through hole
2, aperture 0.5 ~ 1mm.
4. catalysis advanced oxidation sewage sludge treatment facility according to claim 1, is characterized in that the material of described shell is stainless material.
5. catalysis advanced oxidation sewage sludge treatment facility according to claim 1, it is characterized in that described UV projector has multiple, they are in a center of symmetry around the anode of drum.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109879381A (en) * | 2019-04-04 | 2019-06-14 | 浙江海拓环境技术有限公司 | A kind of telescopic electro-Fenton reactor |
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2015
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109879381A (en) * | 2019-04-04 | 2019-06-14 | 浙江海拓环境技术有限公司 | A kind of telescopic electro-Fenton reactor |
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Address after: 210044 No. 148 Xinhua Road, Dachang Street, Jiangbei New District, Nanjing City, Jiangsu Province Co-patentee after: China National Chemical Engineering No.14 Construction Co., Ltd. Patentee after: Jiangsu poly Environmental Technology Co., Ltd. Address before: 211505 No. 1 Bofu Road, Zhongshan Science Park, Liuhe District, Nanjing City, Jiangsu Province Co-patentee before: China National Chemical Engineering No.14 Construction Co., Ltd. Patentee before: Jiangsu Runju New Material Technology Co., Ltd. |