CN107215929A - A kind of electric flocculation unit, electric flocculation device and heavy metal waste water treatment system - Google Patents
A kind of electric flocculation unit, electric flocculation device and heavy metal waste water treatment system Download PDFInfo
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- CN107215929A CN107215929A CN201710665645.0A CN201710665645A CN107215929A CN 107215929 A CN107215929 A CN 107215929A CN 201710665645 A CN201710665645 A CN 201710665645A CN 107215929 A CN107215929 A CN 107215929A
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- 238000005189 flocculation Methods 0.000 title claims abstract description 83
- 230000016615 flocculation Effects 0.000 title claims abstract description 83
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 58
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 28
- 239000010814 metallic waste Substances 0.000 title claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 31
- 238000009413 insulation Methods 0.000 claims abstract description 30
- 230000000694 effects Effects 0.000 claims abstract description 19
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000000945 filler Substances 0.000 claims abstract description 12
- 238000005276 aerator Methods 0.000 claims abstract description 11
- 238000004140 cleaning Methods 0.000 claims abstract description 9
- 238000007667 floating Methods 0.000 claims abstract description 7
- 239000002351 wastewater Substances 0.000 claims description 57
- 239000000463 material Substances 0.000 claims description 13
- 239000002699 waste material Substances 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 11
- 239000010865 sewage Substances 0.000 claims description 9
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- -1 hydroxyl radical free radical Chemical class 0.000 description 9
- 238000012545 processing Methods 0.000 description 9
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
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- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 2
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- 108091006149 Electron carriers Proteins 0.000 description 1
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- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
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- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
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- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 229910021506 iron(II) hydroxide Inorganic materials 0.000 description 1
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- 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
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F1/46114—Electrodes in particulate form or with conductive and/or non conductive particles between them
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- 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
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F2001/46152—Electrodes characterised by the shape or form
- C02F2001/46171—Cylindrical or tubular shaped
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/46—Apparatus for electrochemical processes
- C02F2201/461—Electrolysis apparatus
- C02F2201/46105—Details relating to the electrolytic devices
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/46—Apparatus for electrochemical processes
- C02F2201/461—Electrolysis apparatus
- C02F2201/46105—Details relating to the electrolytic devices
- C02F2201/4616—Power supply
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/02—Fluid flow conditions
- C02F2301/024—Turbulent
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention belongs to heavy metal containing wastewater treatment field, there is provided a kind of electric flocculation unit, electric flocculation device and heavy metal waste water treatment system.Electric flocculation unit includes housing, anode stub, cathode tube, iron carbon ball filler, rotary drag device, uviol lamp, aerator, power module and liquid transporting body, cathode tube is erected in housing, anode stub is erected in cathode tube, rotary drag device is placed in cathode tube with uviol lamp, rotary drag device is flexibly connected with housing by bearing, housing is detachably connected with cathode tube, anode stub, iron carbon ball filler is stacked in cathode tube on the detachably connected insulation board for offering tap hole, insulation board.Electric flocculation device includes several electric flocculation unit, support and reservoirs by pipeline communication composition in parallel or series.Heavy metal waste water treatment system includes electric flocculation device, air-floating apparatus and the ion interchange unit being sequentially connected.The heavy metal containing wastewater treatment effect of the present invention is good, and disassembly, cleaning are convenient.
Description
Technical field
The invention belongs to the technical field of heavy metal wastewater treatment containing organic wastewater, more particularly to a kind of electric flocculation unit,
Electric flocculation device and heavy metal waste water treatment system.
Background technology
With the acceleration of Urbanization in China, the problem of heavy metal pollution triggers has become the environment become increasingly conspicuous and asked
Topic and the life security problem of the people.Heavy metal pollution not only results in human body acute poisoning, subacute poisoning, can also cause
Cancer, teratogenesis, mutagenesis, the harm shown are long-term.
2011, State Council gave an written reply《Heavy metal pollution integrated control " 12 " is planned》, according to planning requirement, arrive
2015, the discharge of the heavy metal contaminants such as key area lead, mercury, chromium, cadmium and metalloid arsenic was cut down 15% than 2007, arrived
2015, key area, emphasis heavy metal pollution discharge capacity reduced 15% than 2007, and the emphasis of non-key area is heavy metal-polluted
Contaminate the level that discharge capacity is no more than 2007.
At present, the Processing tecchnics for heavy metal wastewater thereby include chemical precipitation method, ion-exchange, membrane separation process, electricity wadding
Solidifying method etc..Chemical precipitation method occupies larger specific gravity due to simple to operate in Practical Project practice, but treatment effeciency is relatively low, electricity
Waste electroplating industry is carried be marked with after, it is impossible to qualified discharge, moisture percentage in sewage sludge is high, and sludge quantity is big, and subsequent treatment is more bothered, and
Because the environment of various heavy metal precipitations is different, multistep deposition process is typically employed to, operation and investment cost is added.Ion is handed over
Change method treatment effect preferably, water outlet content of beary metal is low, but there are regeneration issues, adds operating cost；Influent concentration is higher
When, regeneration is frequent.Membrane separation process can reach higher removal efficiency, but must be combined with other techniques, because UF membrane
The concentrated water that method is produced needs further processing could qualified discharge.
Electric flocculation method is considered as the new method in heavy metal containing wastewater treatment field, belongs to electrochemical techniques, is using additional
The effect of electric field, in specific electrochemical reactor, by a series of chemical reaction, electrochemical process or physical process,
Reach the expected purpose for removing water pollutant or removing removing heavy metals.Course of reaction includes Direct Electrochemistry process and Indirect Electro
Chemical process.Direct Electrochemistry process refers to the process of the direct oxidation or reduction occurred at electrode.Indirect electrochemical process
Refer to the Strong oxdiative active material produced using electrode, such as hydroxyl radical free radical makes pollutant occur the mistake of redox reaction
Journey.
The cation that electric flocculation is produced hydrolyzes, polymerize a series of multinuclear hydroxo complex of generation and hydroxide in the solution
Thing, flocculation is played as flocculant, and its process mechanism is similar to chemical coagulation process.In addition, the complex ion and hydrogen that produce
Oxide has very high adsorption activity, and its adsorption capacity hydrolyzes obtained hydroxide higher than general medical method, can effectively inhale
Organic pollution and other colloidal substances in attached water, simultaneously as the dissociation and other materials of water are by electrolytic oxidation, in anode
With the micro-bubble that oxygen and hydrogen will be produced on negative electrode, these bubbles have good Adhesion property, can be by electrolytic process
The cohesion micelle and suspension of middle generation take the water surface to, reach the purpose of separation.Electric flocculation is gone back for the removal aspect of heavy metal
There is the effect of electrochemical reduction metal ion, by the electron reduction metal ion of negative electrode, reach removal heavy metal contaminants
Effect.
Electric flocculation method has treatment effeciency high, and sludge yield is small, it is possible to while the characteristics of removing various heavy.It gram
Take that prior art treatment effeciency is low, there are problems that the bottleneck of secondary pollution, in heavy metal containing wastewater treatment field, especially electroplate
Wastewater treatment, which is carried, has potential competitive advantage under target overall background.
Light electrolysis is exactly to form countless trickle galvanic cells using there is potential difference between iron-carbon particle.These
Trickle battery is to turn into negative electrode with the low iron of current potential, and the high carbon of current potential does anode, is sent out in the aqueous solution containing acidic electrolyte bath
The iron ion that raw electrochemical reaction becomes divalence enters solution.Because iron ion and hydroxyl effect are formd with coagulation
Ferrous hydroxide, it with pollutant in the particulate with faint negative electrical charge there is a natural attraction between the sexes, form more stable flocculate and (also cry
Iron cement) and remove pollutant.
Electric Fenton technology is to utilize Fe2+And H2O2The OH of reaction generation strong oxidizing property, because OH has very high oxygen
Change current potential and non-selectivity, therefore its oxidation Some Organic Pollutants that can degrade.
Joint photocatalysis is used together in electric Fenton technology, can reach certain synergy.In electro-catalysis process
In inevitably there is the side reaction of electrolysis water, generation hydrogen and oxygen, and oxygen is good as one kind in photocatalytic process
Good electron carrier, can be very good to capture photo-generate electron-hole, reduces its recombination velocity, have promotion to photocatalytic process
Effect, and generate hydrogen peroxide, it is to avoid the problem of hydroxyl radical free radical existence time is too short.
However, although electric flocculation method treatment effect is good, because its plate material consumes more, operating cost is higher, into
To limit it in one of the wide variety of factor in heavy metal containing wastewater treatment field.In addition, its pole plate scale problems is also application
Bottleneck, when fouling occurs, electric flocculation can not continuously provide stable electric current, and heavy metal contaminants removal efficiency can drop significantly
It is low.
The associated authorization patent of current existing electric flocculation wastewater treatment is such as：A kind of electric flocculation Waste Water Treatment (patent
Number CN201410396568.X), the patent sewage disposal according to：Heavy metal wastewater thereby → pH adjustment → tubular electrochemical wastewater treatment
→ Al (OH) is reacted in the technique of coagulation → medial launder → separation of solid and liquid → production water, its electric flocculation device：Each row's electric flocculation pipeline
It is set up in parallel before and after in the way of being connected in series, the first section pipeline of preceding discharge pipe is located at lower section, and end pipeline is located at top, middle
Pipeline increases height successively, and concatenation is installed upwards.The mode that electric flocculation unit in whole system is connected in series is single in single processing
Member can only shut down processing when going wrong or change anode material, operation is inconvenient.The system not can effectively solve the problem that simultaneously
Pole plate scale problems.
Therefore, in the urgent need to providing, a kind of apparatus structure is more perfect, electric current is stable, anode will not corrode.Negative electrode will not be tied
Dirt and the more convenient heavy-metal waste water treatment device of operation and technology.
In addition, usually containing organic wastewater in heavy metal wastewater thereby, what can be produced in such as electroplating wastewater containing pretreatment is organic
Can be containing Components of Organic Pollutants such as ink in waste water, board wastewater, and the addition in beneficiation wastewater due to flotation agent also contains
There is organic wastewater.Usual organic wastewater will use single processing unit, i.e., after heavy metal containing wastewater treatment unit, increase life
Thing processing unit or advanced oxidation unit are handled, and longer from flow, unit scale is bigger than normal, and floor space is bigger than normal, urgently
The Waste Water Treatment for needing compact, installation area small.
The content of the invention
Technical problem to be solved of the embodiment of the present invention is to provide a kind of electric flocculation unit, electric flocculation device and a huge sum of money
Belong to Waste Water Treatment, it is intended to the synchronization process of heavy metal wastewater thereby and organic wastewater is realized in a wastewater treatment equipment, solve
Sludge yield that the improvement of heavy metal wastewater thereby in existing process is present is big, poor processing effect, unstable and unpick and wash troublesome ask
Topic.
The embodiment of the present invention is achieved in that a kind of electric flocculation unit of offer, and it includes housing, the anode in cylinder
Rod, the cathode tube in hollow circle tube, iron carbon ball filler, some uviol lamps, aerator, power module, for described the moon
Rotary drag device that the heavy metal deposition thing adhered on pole pipe inwall is struck off and described for waste water to be delivered to
Liquid transporting body in cathode tube；The housing, which is erect, to be placed, and the cathode tube is erected in the housing, and its lower end
Be connected with the lower end removable seal of the housing, the anode stub is erected in the cathode tube, and its upper end with it is described
The upper center of rotary drag device is flexibly connected by bearing, the rotary drag device and described some uviol lamps
It is placed in the cathode tube, the rotary drag device upper end periphery is flexibly connected with the housing upper end by bearing, institute
Some uviol lamps stated are uniformly mounted on the rotary drag device, the positive pole of the power module and the anode stub
Upper end is electrically connected, and the negative pole of the power module is electrically connected with the cathode tube lower end, the negative electrode tube cavity and the anode
Formed between rod on the passage circulated for waste water, the housing and be provided with the liquid outlet connected with the passage, the housing
Lower end is provided with the inlet being connected with the liquid transporting body, cleaning sewage draining exit and is connected with the aerator
Insulation board is detachably connected with air inlet, the cathode tube, the inner chamber of the cathode tube is divided into electric wadding by the insulation board
Solidifying room and solarization air cell, the bottom of the anode stub is removably embedded on the insulation board, if being offered on the insulation board
Equally distributed tap hole is done, the tap hole is connected with the passage, the aerator is arranged in the solarization air cell, institute
State and the iron carbon ball filler is stacked with insulation board.
Further, the anode stub is made up of diamond or graphite material, and the cathode tube is made up of graphite material, institute
State insulation board to be made from a material that be electrically non-conductive, the housing is made up of PVC material or PP materials, the cathode tube and the anode stub
Between clearance distance be 40-100mm.
Further, the iron carbon ball filler packed height is the 1/4 to 1/3 of the cathode tube height.
Further, waterproof insulation transparent quartz glass tube is cased with outside the uviol lamp, the uviol lamp selects wavelength model
Enclose for 254-365nm, power bracket is 50-100W.
Further, the housing includes upper cover plate, body and bottom plate, the lower end of the body and the cathode tube
Lower end is connected with the bottom plate removable seal, and the upper end of the body is bolted connection with the upper cover plate, institute
State liquid outlet to be opened on the body, the inlet, cleaning sewage draining exit and air inlet are opened on the bottom plate, described
Upper cover plate is flexibly connected with the rotary drag device by bearing.
Further, the rotary drag device includes circular slab, scraper, reducing motor, motor fixing frame and electricity
Machine connector, is flexibly connected between the upper cover plate and the circular slab by bearing, and the scraper is fixed on the circular slab
Lower end periphery, and being contacted with the negative electrode inside pipe wall, the upper end of the anode stub is plugged in the circular slab, and with the circle
Shape plate is flexibly connected by bearing, and described some uviol lamps are along the circumferential direction equably plugged on circular slab, the motor
Connector is fixed on the upper end of the circular slab, and the motor fixing frame is fixed on the upper cover plate, the reducing motor peace
On the motor fixing frame, and its output shaft is fixedly connected with the motor contact.
Further, the scraper is plastic brush structure, fabric or polyurethane material structure.
Further, electric flocculation room lower end has the first connecting portion of annular broadside, and solarization air cell's upper and lower end is equal
Second connecting portion with annular broadside, the body upper and lower end is respectively provided with the 3rd connecting portion of annular broadside, and described first connects
Connected between socket part, the second connecting portion of the solarization air cell upper end and the insulation board by stainless steel bolt, on the body
It is the second connecting portion of the solarization air cell lower end, described also through bolt connection between 3rd connecting portion and the upper cover plate at end
3rd connecting portion of body lower end is also through bolt connection on the bottom plate.
The present invention implements embodiment and also provides a kind of electric flocculation device, and it includes electric flocculation unit as described above, waste water
Pipeline, support and reservoir, the electric flocculation unit are installed on the bracket, and the waste pipe is connected with reservoir,
Connected, and constituted in parallel or series by the waste pipe between some described electric flocculation units.
The embodiment of the present invention also provides a kind of heavy metal waste water treatment system, it include electric flocculation device as described above,
Air-floating apparatus and ion interchange unit for removing removing heavy metals scum silica frost and large granular impurity, the electric flocculation device, air supporting
Device and ion interchange unit are sequentially connected in series.
Compared with prior art, beneficial effect is the embodiment of the present invention：The present invention utilizes liquid transporting body by waste water
Negative electrode tube cavity and the circulation passage of anode stub formation are delivered to by inlet, heavy metal wastewater thereby enters electricity under condition of power supply
Solarization air cell is first passed through before flocculating chamber, oxygen is supplied by being aerated into waste water, entrainment of the heavy metal and organic wastewater of tiny bubble
Flow through the insulation board formation turbulent flow provided with tap hole and flow into electric flocculation room.Under electric field action, waste water first with electric flocculation room
Iron carbon ball filler contact occur cell reaction formed ferrous ion, then negative electrode occur reduction reaction, heavy metal ion quilt
It is reduced into metal simple-substance and is suspended in waste water or is attached to cathode tube inwall, dissolves into the oxygen in waste water in air in cathode oxidation
Into H2O2, H2O2With ferrous ion occur fenton react to form the hydroxyl radical free radical of strong oxidizing property can be with the thorough of non-selectivity
Degradation of organic substances, reaches the purpose for removing pollutant, while the Fe of generation3+Also flocculation can be played and remove colloid pollution thing
Deng.
When anode and cathode conductive capability will be had a strong impact on after the upper metal simple-substance of cathode tube inner wall surface attachment, electrolytic efficiency is reduced
With generation H2O2Ability, therefore rotary drag device will can be attached on negative electrode inside pipe wall after cell reaction in the present invention
Heavy metal deposition thing is struck off, it is ensured that anode and cathode electrolysis is good.The rotary drag device strikes off negative electrode attachment in rotation
While also drive uviol lamp to rotate and stir waste water, be uniformly distributed waste strength, reduce concentration polarization.And uviol lamp
Irradiation can further promote fenton reactions to accelerate, and improve the degradation efficiency of sewage, and treatment effect is further strengthened.And
The metal ion of generation is hydrolyzed in water, polymerize, and generates a series of multinuclear hydrolysates, this kind of hydrogen in statu nascendi oxide active
High, high adsorption capacity, is good flocculant, is tied with the colloid in raw water, suspension, soluble pollutants, bacterium, virus etc.
Symphysis is removed into larger flock through precipitation, air supporting.Meanwhile, power supply uses the incorgruous power supply of both positive and negative polarity, i.e. positive pole and anode
Rod upper end is accessed, and negative pole is accessed with cathode tube lower end, is made the homogeneous current distribution formed in both positive and negative polarity cavity, can be effectively improved
The electrolytic efficiency of heavy metal containing wastewater treatment, structure of the invention is to be detachably connected mode, its simple in construction, dismounting and cleaning
It is convenient, heavy metal containing wastewater treatment excellent effect.
Brief description of the drawings
Fig. 1 is electric flocculation cellular construction schematic diagram provided in an embodiment of the present invention；
Fig. 2 is the a-quadrant mplifying structure schematic diagram in Fig. 1；
Fig. 3 is the B regions mplifying structure schematic diagram in Fig. 1；
Fig. 4 is circular slab, scraper and the structural representation of motor contact interconnection in Fig. 1；
Fig. 5 is the schematic diagram after electric flocculation unit shown in Fig. 1 is connected by pipeline；
Fig. 6 is heavy metal waste water treatment system schematic diagram provided in an embodiment of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in Figures 1 to 4, it is a kind of electric flocculation unit 100 provided in an embodiment of the present invention, the electric flocculation unit 100
Including housing 2, anode stub 3, cathode tube 4, iron carbon ball filler 15, some uviol lamps 17, aerator 10, power module (in figure
It is not shown), liquid transporting body 6 and the rotation for being struck off to the heavy metal deposition thing adhered on the inwall of cathode tube 4
Formula doctor blade device 14.Liquid transporting body 6 is installed on support 1 with reservoir 5, and reservoir 5 contains heavy metal for storage
And the waste water of organic matter, liquid transporting body 6 is for the waste water in reservoir 5 to be delivered in cathode tube 4.Housing 2 is vertical
Installation is placed on support 1, and cathode tube 4 is erected in housing 2, and its lower end is connected with the lower end removable seal of housing 2,
Anode stub 3 is erect and is centered in cathode tube 4, and its upper end and the upper center of rotary drag device 14 pass through bearing activity
Connection, rotary drag device 14 is placed in cathode tube 4 with some uviol lamps 17, and some uviol lamps 17 are uniformly mounted to rotation
On formula doctor blade device 14, waterproof insulation transparent quartz glass tube (not shown), rotary drag dress are cased with outside uviol lamp 17
Put 14 upper end peripheries to be flexibly connected by bearing with the upper end of housing 2, enable central shaft of the rotary drag device 14 along housing 2
Line is rotated.In the present embodiment, uviol lamp 17 is 254-365nm from wave-length coverage, and power bracket is 50-100W.Anode stub 3
In cylinder, cathode tube 4 is in hollow cylindrical.Housing 2 is by PVC (Polyvinyl chloride polyvinyl chloride) or PP
(Polypropylene polypropylene) material is made, and anode stub 3 is made up of diamond or graphite material, and cathode tube 4 is by graphite material
It is made, the material of the anode stub 3 does not lose electronics in operation, thus does not corrode, in the absence of electric current is unstable or asking of changing
Topic.Clearance distance between cathode tube 4 and anode stub 3 is 40-100mm.The outer wall of cathode tube 4 is equably provided with reinforcer
40, so as to strengthen the bulk strength of cathode tube 4.The positive pole of power module is electrically connected with the upper end of anode stub 3, power module it is negative
Pole is electrically connected with the lower end of cathode tube 4, so as to be powered to anode stub 3 and cathode tube 4.Shape between cathode tube 4 and anode stub 3
Into the passage 7 circulated for waste water, the liquid outlet 8 connected with passage 7 is provided with housing 2, the lower end of housing 2 is provided with defeated with liquid
Inlet 9, the cleaning sewage draining exit 230 for blowdown and the air inlet 16 being connected with aerator 10 for sending mechanism 6 to connect, expose
Device of air 10 is used to carry out auxiliary stirring to the waste water in cathode tube 4.
In above-described embodiment, liquid transporting body 6 include delivery pump 61 and liquid flowing valve 62, delivery pump 61 respectively with liquid storage
Groove 5, liquid flowing valve 62 are connected, and inlet 9 is connected with liquid flowing valve 62, so, by opening liquid flowing valve 62, start delivery pump
61 can be delivered to waste water pending in reservoir 5 in cathode tube 4 from inlet 9.It is detachably connected with cathode tube 4
The insulation board 11 being made from a material that be electrically non-conductive, the insulation board 11 is removably mounted in cathode tube 4 by bolt 12, and is passed through
Sealing ring 13 is sealed.The inner chamber of cathode tube 4 is divided into electric flocculation room 41 and solarization air cell 42 by insulation board 11.The bottom of anode stub 3
End is removably embedded at the middle part of insulation board 11, for supporting fixed anode rod 3.Some uniform points are offered on insulation board 11
The tap hole 110 of cloth, tap hole 110 is connected with passage 7, for enabling the waste water in solarization air cell 42 to be flowed to electric flocculation room 41
It is logical, and formed in turbulent flow uniform divided flows to electric flocculation room 41, so as to carry out auxiliary stirring to the waste water in cathode tube 4.Insulation board
Iron carbon ball filler 15 is stacked on 11, for carrying out micro-electrolysis reaction to the heavy metal wastewater thereby in electric flocculation room 41, the iron carbon ball is filled out
It is the 1/4 to 1/3 of the height of cathode tube 4 to expect 15 packed heights.
In above-described embodiment, the lower end of electric flocculation room 41 has the first connecting portion 410 of annular broadside, and solarization air cell 42 is upper and lower
End is respectively provided with the second connecting portion 420 of annular broadside.Housing 2 includes upper cover plate 21, body 22 and bottom plate 23.Bottom plate 23 is installed
On support 1, the lower end of body 22 is detachably connected with the lower end of cathode tube 4 with bottom plate 23, the lower end of cathode tube 4 and bottom plate 23
Between sealed by sealing ring 13.The upper end of body 22 is detachably fastenedly connected with upper cover plate 21 also through bolt 12, liquid outlet 8
It is opened on body 22, liquid valve door 18, inlet 9, cleaning sewage draining exit 230 and air inlet 16 is installed at the liquid outlet 8
It is opened on bottom plate 23, upper cover plate 21 is flexibly connected with rotary drag device 14 by bearing.Specifically, body 22 is upper and lower
End is respectively provided with the 3rd connecting portion 220 of annular broadside, first connecting portion 410, the second connecting portion 420 of the upper end of solarization air cell 42 with
Connected, also led between the 3rd connecting portion 220 and upper cover plate 21 of the upper end of body 22 by stainless steel bolt 12 between insulation board 11
Cross bolt 12 to connect, the second connecting portion 420 of the lower end of solarization air cell 42, the 3rd connecting portion 220 of the lower end of body 22 are also through bolt
12 are connected on bottom plate 23.Between above-mentioned body 22 and upper cover plate 21, between body 22 and bottom plate 23, cathode tube 4 and insulation
It is to be detachably connected between plate 11, facilitates disassembly, cleaning.
In above-described embodiment, it is solid that rotary drag device 14 includes circular slab 141, scraper 142, reducing motor 143, motor
Determine frame 144 and motor contact 145.It is flexibly connected between upper cover plate 21 and circular slab 141 by bearing, makes circular slab 141
It can be rotated around its center axis, scraper 142 is fixed on the lower end periphery of circular slab 141, and is contacted with the inwall of cathode tube 4, and this is scraped
Knife 142 can be plastic brush structure, fabric or polyurethane material structure.The upper end of anode stub 3 is plugged on circular slab 141
Middle part, and be flexibly connected with circular slab 141 by bearing, some uviol lamps 17 are along the circumferential direction equably plugged on circular slab
On 141, motor contact 145 is fixed on the upper end of circular slab 141, and motor fixing frame 144 is fixed on upper cover plate 21, and slow down electricity
Machine 143 is arranged on motor fixing frame 144, and its output shaft is fixedly connected with motor contact 145.So, can be by subtracting
The driving circular slab 141 of speed motor 143 is rotated, and the heavy metal adhered on the inwall of cathode tube 4 is sunk so as to rotate scraper 142
Product thing is struck off, easy to clean；And uviol lamp 17 also can be with rotation so that uviol lamp to the radiation effect of waste water more
It is good, accelerate cell reaction speed.
Above-mentioned electric flocculation unit 100 squeezes into pending in reservoir 5 containing heavy metal wastewater thereby when running first
Storage, liquid valve 18 is kept it turned on, and opens liquid flowing valve 62, starts infusion pump 61, so that the waste water in reservoir 5 is defeated
Deliver in cathode tube 4.When waste water will be filled with the passage 7 in cathode tube 4, switch on power module, to anode stub 3 and cathode tube 4
It is powered, starts electric flocculation operation, the sudden and violent air chamber 42 in cathode tube 4 is supplied unlatching aerator 10 and opening-rotary is scraped
Scraper 142 on knife system 14 is rotated in cathode tube 4, and the waste water in cathode tube 4 just starts to have aeration in electrolysis and rotated
Scraper auxiliary stirring, under condition of power supply heavy metal wastewater thereby enter electric flocculation room 41 before first pass through solarization air cell 42, by be aerated to
Oxygen is supplied in waste water, the formation turbulent flow of insulation board 11 provided with tap hole is flowed through entrainment of the heavy metal and organic wastewater of tiny bubble
Flow into electric flocculation room 41.Waste water contacts generation micro-electrolysis reaction with the iron carbon ball filler 15 in electric flocculation room 41 and forms ferrous iron first
Ion, then anode and cathode occur redox reaction, heavy metal ion be reduced into metal simple-substance be suspended in it is in waste water or attached
In the inwall of cathode tube 4, dissolve into oxygen in waste water in air in cathode oxidation into H2O2, H2O2Occur with ferrous ion
Fenton, which reacts, to be formed the hydroxyl radical free radical of strong oxidizing property and can reach removal pollutant with the thorough degradation of organic substances of non-selectivity
Purpose, while generation Fe3+Also flocculation can be played and remove colloid pollution thing etc..
The reaction occurred the following is this electric flocculation anode and negative electrode：
(1) occurs micro-electrolysis reaction after waste water is contacted with iron carbon ball
Anode:Fe-2e—→Fe2+Eo (Fe/Fe)=0.4
Negative electrode:2H++2e→H2Eo (H+/H2)=0V
In the presence of aerobic, cathode reaction is as follows:
O2+4H++4e—→2H2O Eo (O2)=1.23V
O2+2H2O+4e—→4OH-Eo (O2/OH-)=0.41V
(2) electric flocculation device anode and cathode is reacted：
Anode：H2O→·OH+H++OH-+e-
Negative electrode：O2+2H++2e-→H2O2
(3) Fenton key reaction:
H2O2+Fe2+→OH-+Fe3++·OH
Fe2++·OH→Fe3++OH-
The hydroxyl radical free radical oxidisability of generation is extremely strong, while Fe3+ has flocculation again.
When that will have a strong impact on anode and cathode conductive capability after the upper metal simple-substance of the inner wall surface of cathode tube 4 attachment, reduction electrolysis is imitated
Rate and generation H2O2Ability, now the present invention in rotary drag device 14 inwall of cathode tube 4 can will be attached to after cell reaction
On heavy metal deposition thing struck off, it is ensured that anode and cathode electrolysis is good.Revolving scraper strikes off negative electrode attachment in rotation simultaneously
While also drive uviol lamp to rotate and stir waste water, be uniformly distributed waste strength, reduce concentration polarization.And uviol lamp
Irradiation can further promote fenton reactions to accelerate, and improve the degradation efficiency of sewage, and treatment effect is further strengthened.And
The metal ion of generation is hydrolyzed in water, polymerize, and generates a series of multinuclear hydrolysates, this kind of hydrogen in statu nascendi oxide active
High, high adsorption capacity, is good flocculant, is tied with the colloid in raw water, suspension, soluble pollutants, bacterium, virus etc.
Symphysis is removed into larger flock through precipitation, air supporting.Meanwhile, power supply uses the incorgruous power supply of both positive and negative polarity, i.e. positive pole and anode
The upper end of rod 3 is accessed, and negative pole is accessed with the lower end of cathode tube 4, makes the CURRENT DISTRIBUTION formed in both positive and negative polarity cavity evenly, can be effectively
The electrolytic efficiency of heavy metal containing wastewater treatment is improved, and the structure of the present invention is to be detachably connected mode, and its is simple in construction, tear open
Unload with it is easy to clean, water treatment effect is excellent.
It can now be handled with the progress of batch (-type).When undermixing, infusion pump 61 is opened, makes liquid in the He of cathode tube 4
Circulated between reservoir 5, the heavy metal wastewater thereby of flowing passes through the formation turbulent flow of insulation board 11 with tap hole 110, enhancing
Stirring makes electrolysis evenly simultaneously.
To sum up above-mentioned, the electric flocculation unit 100 of the embodiment of the present invention is placed in hollow circle using the anode stub 3 in cylinder
In the cathode tube 4 of tubular so that when occurring cell reaction, CURRENT DISTRIBUTION is more uniform, and electrolytic efficiency is more preferable, so as to make
Water treatment effect is more preferable；The heavy metal deposition thing adhered on the inwall of cathode tube 4 is scraped using rotary drag device 14
Remove, it is to avoid metal attachment negative electrode inside pipe wall causes electric conductivity to decline, and the problem of electrolytic efficiency is low extends anode and cathode service life,
Treatment effeciency is improved, electric energy is saved；The structure of electric flocculation unit 100 is easy to clean and safeguarded by being detachably connected mode；
It is stirred in cathode tube 4 by aerator 10 and revolving scraper device 14, effectively prevents concentration polarization, waste strength is uniform
Distribution, electrolysis effectiveness is excellent；Catalytic reaction is further strengthened by ultra violet lamp, scavenging effect is more thorough；It is defeated by liquid
Mechanism 6 is sent to convey liquid formation circulating reflux, it can aid in stirring in the case where aeration is not good, make processing evenly, imitate
Fruit is more excellent.
Shown in Fig. 5, the embodiment of the present invention additionally provides a kind of electric flocculation device 400, and it includes some above-mentioned electric flocculations
Unit 100, waste pipe 200 and reservoir 5.Electric flocculation unit 100 is arranged on support 1 with reservoir 5, waste pipe
200 are connected with reservoir 5, and some electric flocculation units 100 are connected by waste pipe 200, constitute in parallel or series, so as to
According to the content of beary metal flexible modulation handling process of waste water to be handled.When in parallel, electric flocculation operation can be carried out simultaneously, increased
High throughput.Such as when series connection, be delivered to after the completion of electric flocculation unit 100 is electrolysed next electric flocculation unit 100 after
Continuous electrolysis, makes electrolysis treatment effect more preferable.
As shown in fig. 6, the embodiment of the present invention additionally provides a kind of heavy metal waste water treatment system, it includes above-mentioned electricity wadding
Solidifying device 400, air-floating apparatus 500 and ion interchange unit 600 for removing removing heavy metals scum silica frost and large granular impurity.The electricity
Flocculation plant 400, air-floating apparatus 500 and ion interchange unit 600 are sequentially connected in series, electric flocculation device 400 and ion exchange
Device 600 is connected, for being reprocessed to the concentrated water after processing.The heavy metal waste water treatment system will contain a huge sum of money first
The waste water of category passes through gas again afterwards by metal simple-substance and macromolecular agglutinating matter in the settled wastewater of electric flocculation device 400
Floating device 500 removes removing heavy metals scum silica frost and large granular impurity, realizes qualified discharge finally by ion interchange unit 600, this is
Uniting, the equipment used is few, and water treatment effect is excellent, there is good market popularization value.
It is the experimental result data made by taking certain waste water from plating plant as an example using above-mentioned invention equipment below：
In residence time 2.0h, waste water COD, Cr VI, total copper and the total nickel of four types reach GB21900-
2008 electroplating wastewater discharge standards.Wherein heavy metal wastewater thereby and chromate waste water are also reaching above-mentioned mark in residence time 1.5h
It is accurate.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
Any modifications, equivalent substitutions and improvements made within refreshing and principle etc., should be included in the scope of the protection.
Claims (10)
1. a kind of electric flocculation unit, it is characterised in that the anode stub including housing, in cylinder, the negative electrode in hollow circle tube
Pipe, iron carbon ball filler, some uviol lamps, aerator, power module, for the heavy metal to adhering on the negative electrode inside pipe wall
The rotary drag device that deposit is struck off and the liquid conveyor for being delivered to waste water in the cathode tube
Structure；The housing, which is erect, to be placed, and the cathode tube is erected in the housing, and its lower end and the lower end of the housing are removable
Unload and be tightly connected, the anode stub is erected in the cathode tube, and its upper end and the upper end of the rotary drag device
Middle part is flexibly connected by bearing, and the rotary drag device is placed in the cathode tube with described some uviol lamps, institute
State rotary drag device upper end periphery to be flexibly connected by bearing with the housing upper end, described some uviol lamps are equably
On the rotary drag device, the positive pole of the power module is electrically connected with the anode stub upper end, the power supply
The negative pole of module is electrically connected with the cathode tube lower end, is formed between the negative electrode tube cavity and the anode stub for waste water circulation
Passage, be provided with the liquid outlet connected with the passage on the housing, the lower end of the housing is provided with and the liquid
Can in inlet, cleaning sewage draining exit and the air inlet being connected with the aerator of conveying mechanism connection, the cathode tube
Insulation board is releasably connected with, the inner chamber of the cathode tube is divided into electric flocculation room and solarization air cell, the anode by the insulation board
The bottom of rod is removably embedded on the insulation board, and some equally distributed tap holes, institute are offered on the insulation board
State tap hole to connect with the passage, the aerator is arranged in the solarization air cell, be stacked with the insulation board described
Iron carbon ball filler.
2. electric flocculation unit as claimed in claim 1, it is characterised in that the anode stub is by diamond or graphite material system
Into the cathode tube is made up of graphite material, and the insulation board is made from a material that be electrically non-conductive, and the housing is by PVC or PP materials
It is made, the clearance distance between the cathode tube and the anode stub is 40-100mm.
3. electric flocculation unit as claimed in claim 1, it is characterised in that the iron carbon ball filler packed height is the negative electrode
The 1/4 to 1/3 of cylinder height.
4. electric flocculation unit as claimed in claim 1, it is characterised in that waterproof insulation suprasil is cased with outside the uviol lamp
Glass tube, the uviol lamp is 254-365nm from wave-length coverage, and power bracket is 50-100W.
5. electric flocculation unit as claimed in claim 1, it is characterised in that the housing includes upper cover plate, body and bottom plate,
The lower end of the body and the lower end of the cathode tube are connected with the bottom plate removable seal, the upper end of the body and institute
State upper cover plate to be bolted connection, the liquid outlet is opened on the body, the inlet, cleaning sewage draining exit and
Air inlet is opened on the bottom plate, and the upper cover plate is flexibly connected with the rotary drag device by bearing.
6. electric flocculation unit as claimed in claim 5, it is characterised in that the rotary drag device includes circular slab, scraped
Knife, reducing motor, motor fixing frame and motor contact, between the upper cover plate and the circular slab by bearing activity even
Connect, the scraper is fixed on circular slab lower end periphery, and is contacted with the negative electrode inside pipe wall, the upper end of the anode stub is inserted
Put in the circular slab, and be flexibly connected with the circular slab by bearing, described some uviol lamps are along the circumferential direction equal
It is plugged on evenly on circular slab, the motor contact is fixed on the upper end of the circular slab, the motor fixing frame is fixed on
On the upper cover plate, the reducing motor is arranged on the motor fixing frame, and its output shaft and the motor contact
It is fixedly connected.
7. electric flocculation unit as claimed in claim 6, it is characterised in that the scraper is plastic brush structure, fabric
Or polyurethane material structure.
8. electric flocculation unit as claimed in claim 5, it is characterised in that electric flocculation room lower end has the of annular broadside
One connecting portion, solarization air cell's upper and lower end is respectively provided with the second connecting portion of annular broadside, and the body upper and lower end is respectively provided with ring
3rd connecting portion of shape broadside, the first connecting portion, the second connecting portion of the solarization air cell upper end with the insulation board it
Between connected by stainless steel bolt, also through bolt connection between the 3rd connecting portion and the upper cover plate of the body upper end,
The second connecting portion of the solarization air cell lower end, the 3rd connecting portion of the body lower end are also through bolt connection in the bottom plate
On.
9. a kind of electric flocculation device, it is characterised in that including some electric flocculations as claimed in any of claims 1 to 8 in one of claims
Unit, waste pipe, support and reservoir, the electric flocculation unit are installed on the bracket, the waste pipe and storage
Liquid bath is connected, and is connected between some described electric flocculation units by the waste pipe, and constitute in parallel or series.
10. a kind of heavy metal waste water treatment system, it is characterised in that including electric flocculation device as claimed in claim 9, be used for
Remove the air-floating apparatus and ion interchange unit of removing heavy metals scum silica frost and large granular impurity, the electric flocculation device, air-floating apparatus
It is sequentially connected in series with ion interchange unit.
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| CN114380364A (en) * | 2021-12-20 | 2022-04-22 | 中海油天津化工研究设计院有限公司 | Electric flocculation coupling ozone catalytic oxidation reactor |
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