CN109231352A - A kind of apparatus and method of ultrasound electrocoagulation coupling processing high concentrated organic wastewater - Google Patents
A kind of apparatus and method of ultrasound electrocoagulation coupling processing high concentrated organic wastewater Download PDFInfo
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
- C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
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Abstract
The invention belongs to field of environment engineering technology, it is related to a kind of apparatus and method of ultrasonic electrocoagulation coupling processing high concentrated organic wastewater, core component-aluminium of core component-ultrasonic vibrator and electrocoagulation that ultrasonic wave generates or iron anode pole plate are directly fixedly linked by the present invention, as electrocoagulation plate.Realize that electrode surface directly generates ultrasonic wave; and it is applied to coagulation collecting process; electrode itself is both used as supersonic generator oscillator; also the electrode as coagulation collecting process; ultrasonic water processing technique and electrocoagulation water treatment technology are integrated, reaction speed is accelerated, while improving treatment effect; the drawbacks of can also slowing down or the pole plate passivation that usually will appear during electrocoagulation is avoided to influence treatment effect, high concentrated organic wastewater is effectively treated to realize.
Description
Technical field
The invention belongs to field of environment engineering technology, it is related to a kind of ultrasonic electrocoagulation coupling processing high concentrated organic wastewater
Apparatus and method being capable of effectively coordination electrode passivation while handling organic wastewater simultaneously by ultrasonic wave and electrocoagulation.
Background technique
High concentrated organic wastewater refers to COD in the waste water of 2000mg/L or more, such as pharmaceutical intermediate wastewater, textile industry
The dyeing waste water of discharge and the fermentation of food-processing industry discharge and cleaning solution etc. are produced, its main feature is that complicated component, COD,
BOD, suspension content are high.If direct emission, organic matter water pollution will cause.
Organic matter water pollution has following harm:
1. a large amount of aerobic organic matters enter water body, is decomposed by aerobic microbiological, make dissolved oxygen sharp fall, or even cause
Anaerobic condition, endangers aquatic organism, makes large quantities of fish dead sometimes.
2. the water body that flowing is slow, regeneration period is long, such as lake, pond closed water area, receiving is largely nitrogenous, phosphorus is organic
After waste water, promote bath class mass propagation, is formed " wawter bloom ".
3. water body is by after oily pollution, oil film covers the water surface, prevents the gas exchanges between gas-liquid interface, causes dissolved oxygen short
It lacks, promotes that stench occurs.Grease can also block the fish gill, and fish is made to have difficulty in breathing, and cause death.
4. water body is polluted by highly toxic phenol organic matter, protein denaturation or precipitating can be made, had directly to biological cell
Damage is connect, has deep-etching effect to skin and mucous membrane.Long-term drinking phenols contaminant water can cause dizziness, eruption, itch, anaemia
And various the nervous system diseases.
5. the organic matters such as organo-chlorine pesticide, Polychlorinated biphenyls, polycyclic aromatic hydrocarbon are mostly violent in toxicity strong carcinogens, into water body
After can long-term existence, and difficulty is decomposed, and is often concentrated, amplifies step by step through food chain, causes damages.
With the propulsion of China's process of industrialization, be discharged the food processing of high concentrated organic wastewater, weaving, pharmacy, papermaking,
The industries such as coking and PETROLEUM PROCESSING have obtained high speed development, and corresponding wastewater discharge increases, and further increase major water system
Environmental pressure.China specified " Environmental Quality Standard of Surface Water GB3838-88 " is five classes moisture.Water quality by one, two,
Three, four, five classes and gradually decline.When deteriorating water quality is below the mark to three classes, national regulation is higher by containing substance due to contained
Index will affect human health, therefore cannot function as drinking water source.According to China Environmental State Bulletin in 2014: the Changjiang river, the Yellow River,
The seven major basins such as the Zhujiang River, Song Hua River, Huaihe River, Haihe River, the Liaohe River and the Zhejiang river Min Pian, northwest Zhu He, south-west rivers state control section
In, I class water quality section accounts for 2.8%, rises 1.0 percentage points on year-on-year basis；II class accounts for 36.9%, falls 0.8 percentage point on a year-on-year basis；Ⅲ
Class accounts for 31.5%, falls 0.7 percentage point on a year-on-year basis；IV class accounts for 15.0%, rises 0.5 percentage point on year-on-year basis；V class accounts for 4.8%,
Bad V class accounts for 9.0%, in 407 sections in 197 rivers of monitoring, one to three classes, four or five classes and bad five classes water quality it is disconnected
Face ratio is respectively 49.9%, 26.5% and 23.6%.It can be seen that the pollution in China river is quite serious.For waste water and
The display of discharge of major pollutant amount: 2014, COD total emission volumn was 2294.6 ten thousand tons, fell 2.47% on a year-on-year basis；
Ammonia nitrogen total emission volumn is 238.5 ten thousand tons, falls 2.90% on a year-on-year basis.
The water pollution in China is based on organic pollution, and pollution condition is serious, in order to reduce high concentrated organic wastewater
Discharge, thus avoid may resulting environment and health hazard, explore the work that high concentrated organic wastewater is effectively treated
Process is necessary.
According to degradation of pollutant principle, the processing method of high concentrated organic wastewater is divided into physico-chemical process and biology
Method.Physico-chemical process is to convert innocuous substance using physical and chemical principle for the pollutant component in waste water, make waste water
Be purified, physico-chemical process has 1. oxidizing process: the oxidizing process for high concentrated organic wastewater mainly includes Fenton reagent
Oxidizing process, supercritical water oxidation method, catalytic wet air oxidation；2. coagulant sedimentation: including coagulant sedimentation and photochemistry coagulation
Method；3. electrochemical process: including electrodeposition process, electrochemical oxidation process, electrochemical reducing, electrocoagulation, Electro Sorb method and electric osmose
Analysis method；4. other methods: including incineration method, membrane separation process, extraction, absorption method ultrasonic degradation etc..Biological method is then
Using microbial degradation organic matter principle, by the organic matter removal of bio-degradable in waste water, to purify waste water.Biology side
Method has 1. aerobe method: including activated sludge process and biofilm；2. anaerobic biological process: common anaerobic biological reactor has
Upflow anaerobic sludge blanket process (UASB), internal-circulation anaerobic reactor (IC) and anaerobism flowing plate reactor (ABR).
In the electrochemical process of physico-chemical process, the application of electrocoagulation has longer history, the water and a variety of in source
It has a wide range of applications in industry waste water.Electrocoagulation is also known as electric flocculation, is exactly to be produced under external voltage effect using soluble anode
Raw a large amount of cations, are condensed precipitating to colloid waste water.Usually select iron or aluminium as anode material.(such as by metal electrode
Aluminium) it is placed in processed water, direct current is then passed to, oxidation reaction occurs for metal anode at this time.The aluminium ion of generation is in water
Middle hydrolysis, polymerization generate a series of multicore hydrolysates and play cohesion, process and mechanism and the basic phase of chemical coagulation process
Together.Meanwhile the nascent state generated on cathode in electrocoagulation device, reducing power is very strong, can rise with the pollutant in waste water
Reduction reaction generates hydrogen, may also there is oxygen releasing on anode.When the logical upper direct current of aluminium (iron) electrode, electrocoagulation
It is based on following electrochemical reaction:
Aluminium anodes (oxidation reaction) Al-3e-→Al3+
Al3+ (aq)+3H2O→Al(OH)3+3H+ (aq)
Iron anode (oxidation reaction) Fe-2e-→Fe2+
Fe2+ (aq)+2OH-→Fe(OH)2
4Fe(OH)2+O2(g)+2H2O→4Fe(OH)3
Cathode (reduction reaction) 2H2O+2e-→H2↑+2OH-
Hydrogen and oxygen occur in the form of microbubble, contact in water treatment procedure with suspended particulate can get it is good
Adhesion property, to improve water treatment efficiency.In addition, the partial organic substances in waste water may be decomposed under the action of electric current
Low molecule organic matter, it is also possible to directly be oxidized to CO2And H2O is without generating sludge.Not by the organic moiety of exhaustive oxidation
It can also be with suspended solid particles by Al (OH)3Adsorption-condensation simultaneously drives float downward separation in hydrogen and oxygen.In short, at electrocoagulation
Reason raw water and waste water are the synergistic effects of various procedures, and pollutant is readily removable under these effects.
Electrocoagulation technology has the unexistent advantage of many traditional water treatment technologies: can remove or reduce at the same time and is organic
The noxious materials such as object, bacterium, coloration, heavy metal；Electrocoagulation reaction process can also generate small bubble, be conducive to pollutant
It floats and separates；And electrocoagulation technology do not generate secondary pollution, anti-shock loading strong, high degree of automation, it is simple to operate,
Use cost is low, high treating effect, not only can individually handle, but also can combine with other processing methods.But electrocoagulation technology
There is also have shortcoming at present: anode electrolysis consumption is big, needs to regularly replace；Cathode is likely to form fine and close oxide layer, leads
It causes treatment effeciency reduction and power consumption increases；Current efficiency is relatively low；Concentration polarization influences mass transfer and then influence treatment effect etc..Cause
This reaches the level of high-efficiency low energy consumption, crucial problem, which is that, can find out one kind to keep electrocoagulation technology more perfect
Other technologies or method make up its shortcoming (increasing the corrosion of cathode, improve current efficiency etc.), or even enhancing coagulation
The ability of the poly- original processing organic matter of method.
Since the 1980s, with acoustochemical birth and development, ultrasonic technology has been applied to water pollution control,
In particular for administering increasingly by increasingly extensive attention for toxic organic pollutant difficult to degrade in waste water.Ultrasonic wave drop
The chemical pollutant in water body is solved, a series of physics and chemistry for being based primarily upon ultrasound cavitation effect and thus causing become
Change.Ultrasonic wave is made of a series of longitudinal wave of density interphases, and is propagated around by liquid medium.In the ultrasound of certain power
Under effect, cavitation effect can occur for liquid, i.e. the formation of liquid hollow bubble, growth, is shunk until collapsing, therefrom at oscillation
Cause physical and chemical changes.Each cavitation bubble is one " hot spot ", and the service life is very short, but be can produce about in explosion time
The local high temperature and high pressure environment of 4000k, 100MPa are seen as having extreme physical condition and micro- reaction containing high-energy
Device to produce unusual energy effect, and generates the microjet of speed about l10m/s.Microjet effect can be at interface
Between form strong mechanical stirring effect, and this effect can break through the limitation of laminar boundary layer, to strengthen interface
Between chemical reaction process and substance transmittance process.
The mechanical effect generated when ultrasonic cavitation and chemical effect is mainly utilized in treating organic wastewater by ultrasound.Machinery effect
It should be mainly manifested in the increase at heterogeneous reaction interface, the mass transfer and conducted heat that the update of reaction interface and eddy current effect generate
The reinforcing of journey realizes ultrasonic cleaning, ultrasound are removed, activated sludge shrinks etc. using the process of mechanical effect；Chemical effect master
If pyrolysis H can occur for the hydrone into people's cavitation bubble in this extreme environment2O → H+OH is released
The strong oxidizing properties free radical such as HO；The pyrolysis of similar burning can also occur into the organic compound steam in popularity bubble；
Supercritical water can then be formed in the hydrone of cavitation bubble superficial layer, and supercritical water have low-k, high diffusibility and
The characteristics such as high-transmission ability are a kind of ideal reaction mediums.Utilize the process of chemical effect by organic compound HO oxygen
Change, three kinds of combustion decomposition, supercritical water oxidation approach are degraded in bubble.
Since the moment that the cavitation bubble that ultrasound generates collapses can generate huge impact force, high speed is sprayed to the surface of solids
Microjet has promotion corrosiveness to metal surface, had both at home and abroad more and more researchs get down to ultrasound to corrosion and
The research that different metal surface corrosion influences.M.-L.Doche etc. has studied two parameters pair of ultrasonic power and frequency in salting liquid
The dynamic (dynamical) influence of zine corrosion.In the course of the research, using different ultrasound conditions: different ultrasonic powers and change wavelength
Frequency, the influence in conjunction with entire zine corrosion process study ultrasound to fluidics and mechanical damage (cavitation).Result of study is preliminary
Show to be placed at maximum mass transfer when electrode, corrosion rate is than being higher by 6 to 8 times under quiescent conditions；Tomlinson and Talks are ground
Study carefully cavitation corrosion of the variety classes cast iron in 3% sodium chloride solution, and finds the small mistake generated due to first corrosiveness
Weight is from 1 to 10%, and when corrosion and cavitation corrosion collective effect, weightlessness is from 16 to 90%；In the seawater to copper and cupro-nickel cavitation
In the Research on synergistic effect of corrosion and corrosion, Woood and Fry draw a conclusion, and for cavitation corrosion and corrode simultaneous feelings
Condition, synergistic effect are that the most significantly, 50% penetration depth derives from this；Wang Baocheng etc. is under the conditions of ultrasonic cavitation in hydrochloric acid
The semiconductor behavior of passivation film on stainless steel surface is studied in solution.It was found that passivation film on stainless steel surface is multilayer under silent status
Structure distribution, ultrasonic cavitation are to make outer layer Damage of Passive Film, and polarization current rises, and rate of corrosion increases.Therefore, ultrasound is in gold
Belong to corrosion aspect to be commonly used for depolarizing, enhances electroanalysis electric current, and carry out electrode pretreatment.
In conclusion, there is researcher in the characteristics of according to the strengths and weaknesses of electrocoagulation processing technique and ultrasonication technology
Ultrasonic technology is introduced into electrocoagulation technology, because ultrasonic wave can produce cavitation bubble, plays the effect for strengthening mass transfer；
The moment for the cavitation bubble collapse that ultrasound generates simultaneously can generate high temperature and pressure and microjet, and generated microjet can rise
To the effect for eliminating the concentration polarization generated in electrolytic process；In addition to this, since ultrasonic wave is in the promotion of electrode surface erosion
Effect, alleviates the passivation of electric grade.Therefore, ultrasound, which is introduced into electrocoagulation technology to fill up, is used alone electrocoagulation technology institute
The drawbacks of generation.The two is combined processing waste water by domestic existing research person.
Li Jiangyun etc. is divided into independent ultrasound to the experimental study of ultrasonic synergistic point coagulating gas-floating method processing landfill leachate
Wave processing, 3 stages of independent electrocoagulation air-flotation process and ultrasonic synergistic electrocoagulation air-flotation process.Using single factor analysis
Method discloses reaction time, electrocoagulation voltage, pH value, ultrasonic power and aeration mode to the affecting laws of COD removal rate.
Showing that optimal parameter is reaction time 30min, electrocoagulation voltage 12V, initial pH value 6.0, ultrasonic irradiation power is 125W,
Aeration 20min in advance.With this condition, the mass concentration of COD drops to 232mg/L, COD removal by 822mg/L in percolate
Rate is up to 71.75%, and individually ultrasonic wave and the pneumatically supported removal rate of independent electrocoagulation are only 15.74%, 42.17% respectively, from
And demonstrating ultrasonic technology and electrocoagulation gas floatation process Combined Treatment has synergistic effect；Qian Jiayan etc. degrades to ultrasound-electrocoagulation
Organophosphorus pesticide studies have shown that ultrasonic technique combination so that the raising of organic phosphorus removal efficiency is based primarily upon the machine of ultrasonic wave
Larger molecular organics can be not only degraded into small-molecule substance by tool effect, ultrasonic wave, moreover it is possible to play surface cleaning and table to electrode
The effect of face depassivation.So the combination of ultrasonic wave-electrocoagulation can improve the removal rate of pollutant；All soldiers etc. are to ultrasonic wave added electricity
Coacervation handle waste water from dyestuff research shows that electrode plate combination A-C-A-C is Al-Fe-Fe-Fe, current density is in 15mA/
When cm2, initial pH are 6.00, electrolyte NaSO4 concentration is 0.01mol/L, initial dyeing waste water concentration is 10mg/L, waste water
Percent of decolourization reaches 90% or more, and ultrasonic technique can effectively prevent electrode plate passivation.
It is a kind of more clean wastewater purification technology of technique that ultrasound, which involves electrochemical process all, and sludge and high-concentration waste is not present
The handling problems of liquid.But each is there is also some disadvantages, if ultrasonic wave is difficult to sound solution polarity nonvolatile matter, and electrochemistry
There are electrodes to be easily passivated for rule, polarizes and the problems such as current efficiency is lower.Ultrasonic electrochemical method is that ultrasound is involved electrochemistry side
Method is incorporated in same system for handling, a kind of New Wastewater Treatment Technology art for having complementary advantages, mutually cooperateing with.In recent years, ultrasound electrification
Learning technical research have developed rapidly, and be one of the research frontier of sonochemistry and electrochemistry, about ultrasonic electrochemical technology
Progress foreign countries have Reporting of Overview.
The Synergistic Mechanisms of ultrasonic wave and electric field: 1. influence ultrasonic wave of the ultrasonic wave to mass transfer in liquid phase can greatly increase liquid
Phase mass transfer reduces concentration polarization.It has been generally acknowledged that ultrasound is as caused by high-energy ultrasonic in acoustic propagation side to the humidification of mass transfer
Caused by the high-speed micro-jet generated to forced flow (commonly referred to as acoustic streaming) and cavitation bubble when solid-liquid phase interface collapses.Acoustic streaming
Effect causes entire carrying current to increase, and the confirmations such as Klima J. be superimposed upon it is random small on limit in mean current curve
Spike is the result of microjet effect.Hagan C.R.S. etc. also once analyzed the electric current that emblem jet stream rises with Fourier Tranform and disturbed
It is dynamic.Ultrasonic wave can be measured by cyclic voltammetry, AC impedence method to the humidification of mass transfer in liquid phase.On this basis,
Compton R.G. etc. proposes simple diffusion layer model to describe ultrasonic wave to the shadow of mass transport process on solution electrode interface
It rings, Birkin P.R. etc. is corrected this model.
2. influence of the ultrasonic wave to electrode surface and surface process: ultrasonic wave can both be made with the degassing on intensifier electrode surface
With removal or the passivation phenomenon for improving electrode make electrode surface be continuously updated or expose reaction center, while can accelerate electricity again
The corrosion and abrasion of pole, change the electric catalyticing characteristic of electrode surface.Influence of the ultrasound to electrode surface is investigated, exchange both can be used
The variation of impedance method in-situ monitor electrode surface roughness and surface capacitance, but available atomic force microscope offs normal and observes electrode table
Different shape of the face before and after ultrasonication.
3. influence of the ultrasonic wave to electrode process: ultrasonic cavitation effect may make the part in electrochemical reaction system
Substance is learned, the living radical for being pyrolyzed directly in cavitation bubble or crossing generation with cavitation reacts, and becomes entire electrode process
It is complicated.Compton R.G. was once pointed out in [Fe (CN)6]3-Ultrasonic electric hydrogen reduction during reduction current to anode increase, remove
May it is related with local temperature increase other than, it is also possible to [Fe (CN)6]3-It is not related by the oxidation of HO.Eklund J.C.
Also think the HO re-oxidation that the free radical that the ultrasonic electroreduction of fluorescein generates can be generated by cavitation processes.Currently, to super
The research of sonochemical effect is still very deficient in acoustic-electric chemical system, and the system of Most scholars research is all relatively simple, no
Radical effect comprising cavitation itself, and be only to remove to inquire into ultrasonic wave from the angle of mass transfer to electrode process rate-determining steps
Change or the change to key reaction approach.
4. the influence that ultrasonic wave migrates heterogeneous electron: current most of researcher thinks heterogeneous electron migration rate
k0Hardly influenced by ultrasonic wave.Frank Marken has investigated Ru (NH3) respectively6 3+In Pt electrode, glassy carbon electrode, Ru3+
Reduction on glassy carbon electrode, these three systems adhere to the quick of electron transfer, half reversible and reversible system separately.Even if loud
Under strong ultrasonication, their k0With k when being reported in other documents without ultrasonication0Value is consistent, to illustrate out-phase
Electron transfer process is hardly influenced by ultrasonic wave.
At abroad, Trabdsi et al. achieves good effect using the phenol in ultrasonic wave Electrochemical Technologies for Degradating water body,
And have studied the mass transport process in ultrasonic electrochemical system；Richard etc. has studied the machine that ultrasonic wave acts on electrochemical process
Reason；Garbellini tests ultrasound to the effect of electrochemical degradation pentachlorophenol, and structure shows that the reinforcing due to ultrasonic wave passes
Matter, cleaning electrode increase the effect that hydroxyl radical free radical generates, and the degradation effect of pentachlorophenol is significantly improved；Jih-Hsing
Using the EDTA complex compound of the copper in the method processing waste water of ultrasonic auxiliary electric chemical oxidation, this processing method is found not only
95.6% copper deposition in waste water can be recycled, additionally it is possible to by 84% EDTA oxidative degradation.
At home, Liu waits quietly having carried out exploratory examination with degradation of the ultrasonic electrochemical technology to reactive violet dye waste water
Test, be found that while that ultrasonic wave itself is weaker to the degradation capability of dyeing waste water, but it have to the electrolysis of reactive violet dye waste water it is bright
Aobvious invigoration effect.Decolorizing efficiency under ultrasonic electric microfield synergistic effect is acted on much larger than single electric microfield, is in initial concentration
370mg/L, pH=2, tank voltage is acts on 60min under the optimum condition of 5V, and percent of decolourization is up to 96.6%；Zhang Hui uses ultrasound
Electrochemical method is Congo red to degrade, and experimental result is shown, is 30W/cm in ultrasonic intensity2, voltage 15V, PH 12, electricity
Solution matter throwing amount is 0.1mol/L, and the reaction time is under conditions of 1 hour, and Congo red degradation rate is very high to can achieve 97.51%,
And last Congo red it can gradually be degraded to carbon dioxide and water.
In addition to this, it opens and waits people quietly using Pd, Ru/Ti production catalytic electrode material, be used to ultrasonic electric catalysis of phenol waste water,
Phenol degrading rate is greater than 90% up to 100%, COD removal rate unexpectedly in 60min, and with the increase of voltage, the drop of phenol
Solution rate and COD removal rate increase.Author thinks to may be that voltage increase is conducive to various free radicals such as HO and H in waste water2O2
Increase, be conducive to the degradation of phenol；Wherein influence of the pH value to degradation rate is very big, under alkaline case, phenol degrading amount
It is few, it may be possible to which that with the phenol that NaOH is adjusted with the presence of phenol na form, the degree of ionization of phenol increases, and the phenol of ionic state can not be into
The gas phase zone that people's ultrasound generates, HO the and H free radical only generated in ultrasonic procedure works to degradation, and ultrasonic procedure
In cavitation bubble in pyrolysis do not work.
Previous ultrasonic electrochemical combination is that ultrasonic wave is additional, and such ultrasonic wave has loss in transmittance process,
Simultaneously because additional ultrasonic energy is transmitted in entire wastewater treatment equipment, it is difficult to realize to the waste water between electrocoagulation the two poles of the earth
Treatment process applies bigger influence, and effect is more dispersed, and region is to realize water treatment procedure between electrode during electrocoagulation
Nucleus.
Summary of the invention
The present invention in order to overcome the shortcomings in the prior art, provides a kind of novel ultrasonic and electrocoagulation coupling high concentration is organic
Wastewater treatment equipment and method.The electrode and ultrasonic oscillator of electrocoagulation are coupled together, electrode is allowed to send out directly as ultrasonic wave
One of the component of raw device, directly generates ultrasonic wave on the electrode, can not only reduce the loss in ultrasonic wave transmittance process to the greatest extent,
And can preferably the waste water processed between the two poles of the earth is stirred and be dispersed, slow down concentration polarization effect to realize, improves
Treatment effect can also directly slow down the passivation of electrode and reinforce effect of mass transmitting.
When ultrasonic wave is applied directly to metallic iron or aluminium surface, because of cavitation etc., metal surface can be accelerated
Corrosion, is used to the phenomenon, by applying ultrasonic wave between the two poles of the earth, accelerates the corrosion rate of the two poles of the earth metal surface, changes
Evil is benefit, and avoiding the generation of electrode passivation quickening metal ion flocculant from being undoubtedly coagulation collecting process has facilitation.This
Invention is by the core component of one of the core element of supersonic generator ultrasonic vibrator and coagulation collecting process --- metal electrode coupling
Altogether, it realizes that electrode surface directly generates ultrasonic wave, and is applied to coagulation collecting process, electrode itself is both used as ultrasonic wave
Device oscillator, also the electrode as coagulation collecting process, ultrasonic water processing technique and electrocoagulation water treatment technology are integrated, and are accelerated anti-
Speed is answered, treatment effect is improved, organic wastewater is effectively treated in realization.
For achieving the above object, the technical solution adopted by the present invention is that:
A kind of device of ultrasound electrocoagulation coupling processing high concentrated organic wastewater, the device include ultrasonic electro-coagulation equipment and
Auxiliary device two parts；Ultrasonic electro-coagulation equipment is mainly by ultrasonic vibrator, ultrasonic electrocoagulation anode electrode and electrocoagulation cathode electricity
Pole is constituted, and auxiliary device includes the DC power supply for ultrasonic vibrator power supply and is the DC voltage-stabilizing electricity that coagulation collecting process is powered
Source further includes matched horizonal base plate and vertical support frame, ultrasonic vibrator electrode fixing device, reactive tank；
One piece of electrode pad is secured by threads to the vibration end of ultrasonic vibrator, becomes the anode of coupling ultrasonic electrocoagulation；
The waist of ultrasonic vibrator is fixed on horizontal bracket by quoit, and horizontal bracket is fixed on vertical support frame, and is installed to water
On flat bed, it is ensured that the plate of ultrasonic electrocoagulation is perpendicular to horizontal plane；Electrocoagulation cathode plate is screwed bracket
On, and be connected with horizontal bracket, it is ensured that distance is adjustable between ultrasonic electrocoagulation plate, insulate, and the two is parallel；Ultrasound
The anode electrode of electrocoagulation is connected with the anode of electrocoagulation power supply with conducting wire, the cathode of electrocoagulation cathode electrode and electrocoagulation power supply
It is connected with conducting wire；The power supply of ultrasonic vibrator is arranged according to its positive and negative anodes to be connected with conducting wire with ultrasonic-frequency power supply respectively；Reactive tank lower part
Magnetic stirrer is set；High concentrated organic wastewater to be processed is added in reactive tank, is put into stirrer；Ultrasonic electrocoagulation anode electricity
Pole and electrocoagulation cathode electrode are dipped vertically into waste water, and electrode main body-portions submerge in water.
The pole plate of above-mentioned ultrasound electrocoagulation anode electrode and electrocoagulation cathode electrode is that metallic iron or aluminium are process.
Core component-the aluminium or iron anode pole plate of core component-ultrasonic vibrator and electrocoagulation that ultrasonic wave is generated are direct
It is fixedly linked, as electrocoagulation plate.It realizes that electrode surface directly generates ultrasonic wave, and is applied to coagulation collecting process, electricity
Pole itself is both used as supersonic generator oscillator, also the electrode as coagulation collecting process, by ultrasonic water processing technique and coagulation
Polywater processing technique is integrated, accelerates reaction speed, while improving treatment effect, can also slow down or avoid coagulation collecting process
In the pole plate passivation that usually will appear the drawbacks of influencing treatment effect, high concentrated organic wastewater is effectively treated to realize.
When handling waste water, after device is assembled, pole plate immerses in waste water, is kept fixed pole plate spacing and fits to waste water
When stirring is to promote mass transport process, while pole plate is separately connected D.C. regulated power supply output end, it is ensured that plate and power supply are just
Extremely it is connected, and guarantees that ultrasonic vibrator is connect with its power source special.Power supply is first turned on, the anodic dissolution processes of electrocoagulation occur,
Metallic iron or aluminium ion are generated, electrocoagulation reaction occurs.Aluminium or iron on the plate will be dissolved into waste water,
Flocculant is formed floating after the pollutant flocculation in waste water or sinks to being allowed to be removed.But the pole plate is easy passivation, gold
The speed for belonging to ion-solubility can be slower and slower until insoluble.So at the same time, ultrasonic vibrator power supply is opened, so that metal is positive
Pole pole plate as the synchronous generation ultrasonic wave of ultrasonic generator, and is transmitted to ultrasonic wave while anodic solution occurs
In water, waste water is handled, while the oxidation film on the pole plate can be made to dissolve, avoid it from being passivated, it is ensured that the metal in pole plate
Ion continues to dissolve into waste water for handling waste water.It is explored according to waste water quality and early period as a result, after processing different time, is closed
Ultrasonic-frequency power supply turns off electrocoagulation power supply, and pollutant concentration situation of change in processed waste water is analyzed in sampling, until meeting place
Reason requires.
The present invention realizes two by the way that traditional electrocoagulation wastewater treatment process and ultrasonic wave wastewater treatment process are coupled together
The organic assembling of kind wastewater treatment mode plays ultrasonic wave for the promotion corrosiveness of plate, accelerates its solution rate,
And it is avoided that the passivation of plate, it is ensured that the treatment effect of high concentrated organic wastewater.By by ultrasonic technique and electrocoagulation
Technology coupling, can promote the corrosiveness of polar board surface, in same decomposition voltage, accelerate pole plate Metal ion release
Process improves the mass transfer velocity of the neighbouring waste water of pole plate during electrocoagulation, enhances turbulence effect and the disturbance of polar board surface waste water
Effect, the iron ion or chloride ion for being conducive to electrolysis generation are spread to waste body, to reduce concentration polarization, mitigate pole plate
Passivation.
The present invention is other than it can be used to handle high concentrated organic wastewater, for sanitary sewage and other types work
Industry waste water etc. is also processed similarly effect, is with a wide range of applications.
Detailed description of the invention
Fig. 1 is ultrasonic electrocoagulation coupling treatment of sewage water schematic device；(a) device overall pattern, (b) ultrasonic electrocoagulation yin,
Anode schematic diagram.
In figure: A vertical support frame；The sub- positive pole of B ultrasound sound and vibration；C ultrasonic vibrator power cathode；D ultrasonic vibrator；The vibration of E ultrasound
The fixed device of son；F electrocoagulation positive pole；G electrocoagulation power cathode；H simulated wastewater；I horizontal base；J reactive tank；K ultrasound
Electrocoagulation anode；L stirring rotator；M magnetic stirrer；N ultrasound electrocoagulation cathode.
Fig. 2 acid black ATT UV-visible absorption spectrum.
The waste water decoloring situation of the independent ultrasonication of Fig. 3.
Waste water decoloring situation under the conditions of Fig. 4 different disposal.
The situation of change of Fig. 5 high-precision power analyzer measuring unit time loop current.
Specific embodiment
A specific embodiment of the invention is described in detail below in conjunction with technical solution and attached drawing.
Acid black ATT is a kind of acid azo-colour, and brown ceramic powder, being dissolved in water is dark solution.It is mainly used for wool, silkworm
Dyeing and the stamp of silk, polyamide fibre and blended fabric.Because its is representative and easily buys, pretend to represent dyestuff and being ground
Study carefully.
Acid black ATT UV-visible absorption spectrum is as follows:
As shown in Figure 2, there are maximum absorption bands at 620nm for acid black ATT molecule, therefore in following experiment samples taken
The measurement of absorbance is carried out to acid black ATT in 620nm.In research process, electrode pad is having a size of 80 х 100mm, effectively
Area is 8000mm2。
It is individually ultrasonically treated waste water: taking 3500mg/L acid black ATT waste water from dyestuff 500ml in beaker, in electrolyte
Na2SO4Concentration is 0.015mol/L, and mixing speed 250r/min, pole plate spacing is 4cm, and ultrasonic vibrator vibration frequency is 60HZ
Experiment condition under, react two hours, per half an hour one samples, its absorbance is measured after sampling, experimental result is as shown in the figure:
From the figure 3, it may be seen that, with the growth of time, the percent of decolourization of waste water gradually increases in the case where other conditions are constant,
In 120min, the percent of decolourization of waste water reaches 45%, this illustrates that ultrasound has certain degradation for waste water.
Independent electrocoagulation handles waste water: taking 3500mg/L acid black ATT waste water from dyestuff 500ml in beaker, uses electrode
For iron electrode, in electrolyte Na2SO4Concentration is 0.015mol/L, and mixing speed 250r/min, pole plate spacing is 4cm, voltage
To react one hour under the experiment condition of 10V, every 10min mono- is sampled, its absorbance is measured after sampling.
Ultrasonic electrocoagulation coupling processing waste water: taking 3500mg/L acid black ATT waste water from dyestuff 500ml in beaker, uses
Electrode is iron electrode, in electrolyte Na2SO4Concentration is 0.015mol/L, and mixing speed 250r/min, pole plate spacing is 4cm,
Ultrasonic vibrator vibration frequency is 60Hz, and voltage is to react one hour under the experiment condition of 10V, and every 10min mono- is sampled, in 10min
Interior, the ultrasonic electrocoagulation coupling processing time: the independent electrocoagulation processing time is 1:5, its absorbance, experimental result are measured after sampling
It is as shown in the figure:
As shown in Figure 4, under identical experiment condition, under Different treatments, the percent of decolourization of waste water is with the time
Extend in the trend being slowly increased afterwards that first increases sharply.Two ways compares, in the same processing time, ultrasonic electrocoagulation coupling
Processing is higher than independent electrocoagulation processing decolorization rate of wastewater, and effect is good.This illustrates that ultrasonic electrocoagulation coupling processing waste water can mention
High disposal effect.
Ultrasound handles the principle analysis of waste water effect for improving independent electrocoagulation:
It takes 3500mg/L acid black ATT waste water from dyestuff 500ml in beaker, the use of electrode is iron electrode, in electrolyte
Na2SO4Concentration is 0.015mol/L, and mixing speed 250r/min, pole plate spacing is 4cm, and ultrasonic vibrator vibration frequency is
60Hz, voltage are to react 60min under the experiment condition of 10V, and every 10min adds primary ultrasound, each ultrasound 2min.In this mistake
Instrument is connected to the situation of change of high-precision power analyzer measuring unit time loop current to verify by Cheng Zhong.
High-precision power analyzer is connected to the image that occurs on computer, and following (abscissa is the time, and ordinate is unit
The size of current passed through in time):
It in Fig. 5, can clearly observe, coupling ultrasonic electric current is obviously improved each time, is turned off after two minutes
Ultrasound, electric current start decline rapidly after rising a part.Illustrate that ultrasonic wave can accelerate the corrosion rate of electrode, reduces electrode table
Face passivation, increases mass transfer in liquid phase, to accelerate reaction speed, improves water treatment effect.
Claims (3)
1. a kind of device of ultrasound electrocoagulation coupling processing high concentrated organic wastewater, which is characterized in that the device includes ultrasonic electric
Coacervation device and auxiliary device two parts；Ultrasonic electro-coagulation equipment is mainly by ultrasonic vibrator, ultrasonic electrocoagulation anode electrode and electricity
It agglomerates cathode electrode to constitute, auxiliary device includes the DC power supply for ultrasonic vibrator power supply and is the straight of coagulation collecting process power supply
Regulated power supply is flowed, further includes matched horizonal base plate and vertical support frame, ultrasonic vibrator electrode fixing device, reactive tank；
Electrode pad is secured by threads to the vibration end of ultrasonic vibrator, becomes the anode of coupling ultrasonic electrocoagulation；Ultrasonic vibrator
Waist be fixed on horizontal bracket by quoit, horizontal bracket is fixed on vertical support frame, and be installed on horizontal base,
Ensure the plate of ultrasonic electrocoagulation perpendicular to horizontal plane；Electrocoagulation cathode plate is screwed on bracket, and and water
Flat bracket is connected, it is ensured that distance is adjustable between ultrasonic electrocoagulation plate, and the two is parallel；The anode electricity of ultrasonic electrocoagulation
Pole is connected with the anode of electrocoagulation power supply with conducting wire, and electrocoagulation cathode electrode is connected with the cathode of electrocoagulation power supply with conducting wire；It is super
The power supply of sound and vibration is arranged according to its positive and negative anodes to be connected with conducting wire with ultrasonic-frequency power supply respectively；Electromagnetic agitation is arranged in reactive tank lower part
Device；High concentrated organic wastewater to be processed is added in reactive tank, is put into stirrer；Ultrasonic electrocoagulation anode electrode and electrocoagulation yin
Pole electrode is dipped vertically into waste water, and electrode main body-portions submerge in water.
2. the apparatus according to claim 1, which is characterized in that the ultrasound electrocoagulation anode electrode and electrocoagulation cathode electricity
The pole plate of pole is that metallic iron or aluminium are process.
3. using the method for device as claimed in claim 1 or 2 processing high concentrated organic wastewater, which is characterized in that
The magnetic stirrer of starting reactive tank lower part starts to stir, while opening ultrasonic vibrator power supply and electrocoagulation power supply, starts
Waste water in reactive tank is handled；It is explored according to waste water quality and early period as a result, after processing different time, closes ultrasonic electric
Source turns off electrocoagulation power supply, and pollutant concentration situation of change in processed waste water is analyzed in sampling, until meeting processing requirement.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112875970A (en) * | 2021-01-18 | 2021-06-01 | 长沙工研院环保有限公司 | Ultrasonic alternating current flocculation phosphorus removal device and method |
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| CN102424495A (en) * | 2011-10-28 | 2012-04-25 | 广西博世科环保科技股份有限公司 | Ultrasound, magnetic field, pulse electrocoagulation and membrane composite waste water treatment method, and apparatus thereof |
| CN202849188U (en) * | 2012-09-19 | 2013-04-03 | 北京格瑞奥环境科技有限公司 | Ultrasonic electric flocculation and precipitation integrated device |
| CN203079777U (en) * | 2012-08-28 | 2013-07-24 | 中泽技鑫环保科技(上海)有限公司 | Treatment device for removing ammonia nitrogen in waste liquid |
| CN105593171A (en) * | 2014-02-13 | 2016-05-18 | 蓝星(北京)化工机械有限公司 | Micro-electrolysis device and control method, integrated water processing device and water processing method |
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| CN102424495A (en) * | 2011-10-28 | 2012-04-25 | 广西博世科环保科技股份有限公司 | Ultrasound, magnetic field, pulse electrocoagulation and membrane composite waste water treatment method, and apparatus thereof |
| CN203079777U (en) * | 2012-08-28 | 2013-07-24 | 中泽技鑫环保科技(上海)有限公司 | Treatment device for removing ammonia nitrogen in waste liquid |
| CN202849188U (en) * | 2012-09-19 | 2013-04-03 | 北京格瑞奥环境科技有限公司 | Ultrasonic electric flocculation and precipitation integrated device |
| CN105593171A (en) * | 2014-02-13 | 2016-05-18 | 蓝星(北京)化工机械有限公司 | Micro-electrolysis device and control method, integrated water processing device and water processing method |
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| CN112875970A (en) * | 2021-01-18 | 2021-06-01 | 长沙工研院环保有限公司 | Ultrasonic alternating current flocculation phosphorus removal device and method |
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Application publication date: 20190118 |