CN207192884U - 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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- CN207192884U CN207192884U CN201720981814.7U CN201720981814U CN207192884U CN 207192884 U CN207192884 U CN 207192884U CN 201720981814 U CN201720981814 U CN 201720981814U CN 207192884 U CN207192884 U CN 207192884U
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- electric flocculation
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- housing
- heavy metal
- waste water
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Abstract
The utility model 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, insulation board is detachably connected with cathode tube, stacks iron carbon ball filler on 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.Heavy metal containing wastewater treatment effect of the present utility model is good, and disassembly, cleaning are convenient.
Description
Technical field
The utility model belongs to the technical field of heavy metal wastewater treatment containing organic wastewater, more particularly to a kind of electric flocculation list
Member, 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 to become increasingly conspicuous and asks
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, 15% was cut down than 2007, is arrived
2015, key area, emphasis heavy metal pollution discharge capacity reduced 15% than 2007, the emphasis heavy metal of non-key area
Discharge amount of pollution is no more than the level of 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 carries be marked with after, it is impossible to qualified discharge, moisture percentage in sewage sludge are high, and sludge quantity is big, and subsequent treatment is more troublesome, and
Because the environment of various heavy metal precipitations is different, multistep deposition process is typically employed to, adds operation and investment cost.Ion is handed over
It is preferable to change method treatment effect, water outlet content of beary metal is low, but regeneration issues be present, 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
Concentrated water caused by method 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 utilize Strong oxdiative active material, such as hydroxyl radical free radical caused by electrode, make pollutant that the mistake of redox reaction occur
Journey.
Cation caused by electric flocculation hydrolyzes, polymerize a series of multinuclear hydroxo complex of generation and hydroxide in the solution
Thing, flocculation is played as flocculant, its process mechanism is similar to chemical coagulation process.In addition, caused complex ion and hydrogen
Oxide has very high adsorption activity, and its adsorption capacity can effectively inhale higher than the hydroxide that general medical method hydrolyzes to obtain
Organic pollution and other colloidal substances in attached water, simultaneously as the dissociation and other materials of water be 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
In it is caused cohesion micelle and suspension take the water surface to, reach the purpose of separation.In terms of removal of the electric flocculation for heavy metal also
The effect of electrochemical reduction metal ion be present, 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, and the characteristics of various heavy can be removed simultaneously.It gram
Take that prior art treatment effeciency is low, the bottleneck of secondary pollution be present, in heavy metal containing wastewater treatment field, especially electroplate
Wastewater treatment, which carries, has potential competitive advantage under target overall background.
Light electrolysis is exactly using foring numerous trickle galvanic cell between iron-carbon particle there is potential difference.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, 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 the side reaction of electrolysis water inevitably be present, generate hydrogen and oxygen, and oxygen is as a kind of good in photocatalytic process
Good electron carrier, it can be very good to capture photo-generate electron-hole, reduce its recombination velocity, have promotion to photocatalytic process
Effect, and hydrogen peroxide is generated, avoid the problem of hydroxyl radical free radical existence time is too short.
However, although electric flocculation method treatment effect is good, because the consumption of its plate material is 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) reacts the technique of coagulation → medial launder → separation of solid and liquid → production water, in its electric flocculation device：Each row's electric flocculation pipeline
It is set up in parallel before and after in a manner 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 concatenation installation upwards successively.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, there is an urgent need to provide, 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, organic wastewater is usually contained in heavy metal wastewater thereby, it is organic as caused by can contain pretreatment in electroplating wastewater
Waste water, the Components of Organic Pollutants such as ink can be contained in 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
Need Waste Water Treatment compact, that installation area is small.
Utility model content
The utility model embodiment technical problem to be solved be to provide a kind of electric flocculation unit, electric flocculation device and
Heavy metal waste water treatment system, it is intended to the synchronization process of heavy metal wastewater thereby and organic wastewater is realized in a wastewater treatment equipment,
Solves sludge yield existing for the improvement of the heavy metal wastewater thereby in existing process big, poor processing effect, unstable and unpick and wash trouble
The problem of.
The utility model embodiment, which is achieved in that, provides a kind of electric flocculation unit, and it includes housing, in cylinder
Anode stub, in the cathode tube of hollow circle tube, iron carbon ball filler, some uviol lamps, aerator, power module, for institute
State rotary drag device that the heavy metal deposition thing adhered on negative electrode inside pipe wall struck off and for waste water to be delivered to
Liquid transporting body in the cathode tube；The housing, which is erect, to be placed, and the cathode tube is erected in the housing, and its
Lower end is connected with the lower end removable seal of the housing, and the anode stub is erected in the cathode tube, and its upper end with
The upper center of the rotary drag device is flexibly connected by bearing, the rotary drag device and described some purples
Outer lamp is placed in the cathode tube, and the rotary drag device upper end periphery is connected with the housing upper end by bearing activity
Connect, described some uviol lamps are uniformly mounted on the rotary drag device, the positive pole of the power module with it is described
Anode stub upper end electrically connects, and the negative pole of the power module electrically connects with the cathode tube lower end, the negative electrode tube cavity and institute
The passage formed between anode stub for waste water circulation is stated, the liquid outlet connected with the passage is provided with the housing, it is described
The lower end of housing be provided be connected with the liquid transporting body inlet, cleaning sewage draining exit and with the aerator
The air inlet of connection, is detachably connected with insulation board in the cathode tube, and the insulation board is by the inner chamber of the cathode tube point
For electric flocculation room and solarization air cell, the bottom of the anode stub removably on the insulation board, is opened on the insulation board
Provided with some equally distributed tap holes, the tap hole connects with the passage, and the aerator is arranged on the aeration
Interior, the iron carbon ball filler is stacked with the 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 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, it is flexibly connected between the upper cover plate and the circular slab by bearing, 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 a 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 are 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 utility model implements embodiment and also provides a kind of electric flocculation device, it include electric flocculation unit as described above,
Waste pipe, support and reservoir, on the bracket, the waste pipe connects with reservoir for the electric flocculation unit installation
It is logical, connected between some described electric flocculation units by the waste pipe, and form in parallel or series.
The utility model embodiment also provides a kind of heavy metal waste water treatment system, and it includes electric flocculation dress as described above
Put, air-floating apparatus and ion interchange unit for removing removing heavy metals scum silica frost and large granular impurity, the electric flocculation device, gas
Floating device and ion interchange unit are sequentially connected in series.
Compared with prior art, beneficial effect is the utility model embodiment：The utility model utilizes liquid conveyor
Waste water is delivered to negative electrode tube cavity and the circulation passage of anode stub formation by structure by inlet, and heavy metal gives up under condition of power supply
Water first passes through solarization air cell before entering electric flocculation room, and oxygen is supplied into waste water by aeration, heavy metal entrainment of tiny bubble and
Organic wastewater flows through the insulation board provided with tap hole and forms turbulent flow inflow electric flocculation room.Under electric field action, waste water first with electricity
Iron carbon ball filler contact in flocculating chamber occurs cell reaction and forms ferrous ion, and reduction reaction, a huge sum of money then occurs in negative electrode
Category ion 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 and exists
Cathode oxidation is into H2O2, H2O2With ferrous ion occur fenton react to form the hydroxyl radical free radical of strong oxidizing property can be without selection
Property thorough degradation of organic substances, reach remove pollutant purpose, while generate Fe3+Also flocculation can be played and remove colloid
Pollutant etc..
Anode and cathode conductive capability will be had a strong impact on after cathode tube inner wall surface adheres to upper metal simple-substance, reduces electrolytic efficiency
With generation H2O2Ability, therefore rotary drag device can will be attached to negative electrode inside pipe wall in the utility model after cell reaction
On heavy metal deposition thing struck off, ensure that anode and cathode electrolysis is good.It is attached that the rotary drag device in rotation strikes off negative electrode
Also drive uviol lamp to rotate while thing and stir waste water, be uniformly distributed waste strength, reduce concentration polarization.It is and ultraviolet
The irradiation of lamp can further promote fenton reactions to accelerate, and improve the degradation efficiency of sewage, treatment effect further adds
By force.And caused metal ion is hydrolyzed in water, polymerize, a series of multinuclear hydrolysates, this kind of hydrogen in statu nascendi oxide are generated
Active height, adsorption capacity are strong, are good flocculants, with the colloid in raw water, suspension, soluble pollutants, bacterium, virus
Larger flock is generated Deng combining, is removed through precipitation, air supporting.Meanwhile power supply uses the incorgruous power supply of both positive and negative polarity, i.e., positive pole with
Anode stub upper end is accessed, and negative pole accesses with cathode tube lower end, makes the homogeneous current distribution formed in both positive and negative polarity cavity, can be effectively
The electrolytic efficiency of heavy metal containing wastewater treatment is improved, structure of the present utility model is detachable connection, and its is simple in construction, tears open
Unload with easy to clean, heavy metal containing wastewater treatment excellent effect.
Brief description of the drawings
Fig. 1 is the electric flocculation cellular construction schematic diagram that the utility model embodiment provides；
Fig. 2 is the a-quadrant mplifying structure schematic diagram in Fig. 1；
Fig. 3 is the structural representation that circular slab, scraper and motor contact in Fig. 1 are connected with each other；
Fig. 4 is the B area mplifying structure schematic diagram in Fig. 1；
Fig. 5 is the schematic diagram after the electric flocculation unit shown in Fig. 1 is connected by pipeline；
Fig. 6 is the heavy metal waste water treatment system schematic diagram that the utility model embodiment provides.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining
The utility model, it is not used to limit the utility model.
As shown in Figures 1 to 4, be the utility model embodiment provide a kind of electric flocculation unit 100, the electric flocculation unit
100 include housing 2, anode stub 3, cathode tube 4, iron carbon ball filler 15, some uviol lamps 17, aerator 10, power module
(not shown), liquid transporting body 6 and for being struck off to the heavy metal deposition thing adhered on the inwall of cathode tube 4
Rotary drag device 14.Liquid transporting body 6 is installed on support 1 with reservoir 5, and reservoir 5 is used to store containing weight
The waste water of metal and organic matter, liquid transporting body 6 are used to the waste water in reservoir 5 being delivered in cathode tube 4.Housing 2
Vertically-mounted to be placed on support 1, cathode tube 4 is erected in housing 2, and its lower end and the lower end removable seal of housing 2
Connection, anode stub 3 are erect and are centered in cathode tube 4, and its upper end and the upper center of rotary drag device 14 pass through axle
Flexible connection is held, rotary drag device 14 is placed in cathode tube 4 with some uviol lamps 17, and some uviol lamps 17 are equably pacified
On rotary drag device 14, waterproof insulation transparent quartz glass tube (not shown) is cased with outside uviol lamp 17, is rotated
The upper end periphery of formula doctor blade device 14 is flexibly connected with the upper end of housing 2 by bearing, enables rotary drag device 14 along housing 2
Center axis thereof.In the present embodiment, uviol lamp 17 is 254-365nm, power bracket 50- from wave-length coverage
100W.For anode stub 3 in cylinder, cathode tube 4 is in hollow cylindrical.Housing 2 is by PVC (Polyvinyl chloride polychlorostyrene second
Alkene) or PP (Polypropylene polypropylene) material be made, anode stub 3 is made up of diamond or graphite material, cathode tube 4 by
Graphite material is made, and the material of the anode stub 3, does not lose electronics in operation, thus does not corrode, in the absence of electric current it is unstable or
The problem of replacing.Clearance distance between cathode tube 4 and anode stub 3 is 40-100mm.The outer wall of cathode tube 4 is equably set
There is reinforcer 40, so as to strengthen the bulk strength of cathode tube 4.The positive pole of power module electrically connects with the upper end of anode stub 3, electricity
The negative pole of source module electrically connects with the lower end of cathode tube 4, so as to be powered to anode stub 3 and cathode tube 4.Cathode tube 4 and sun
The passage 7 for waste water circulation is formed between pole rod 3, is provided with the liquid outlet 8 connected with passage 7 on housing 2, the lower end of housing 2 is set
It is equipped with the inlet 9 being connected with liquid transporting body 6, the cleaning sewage draining exit 230 for blowdown and is connected with aerator 10
Air inlet 16, aerator 10 be used for auxiliary stirring is carried out to the waste water in cathode tube 4.
In above-described embodiment, liquid transporting body 6 includes delivery pump 61 and liquid flowing valve 62, delivery pump 61 respectively with storage
Liquid bath 5, liquid flowing valve 62 connect, and inlet 9 connects with liquid flowing valve 62, so, by opening liquid flowing valve 62, start conveying
Waste water pending in reservoir 5 can be delivered in cathode tube 4 by pump 61 from inlet 9.Removably connect in cathode tube 4
The insulation board 11 being made from a material that be electrically non-conductive is connected to, the insulation board 11 is removably mounted in cathode tube 4 by bolt 12, and
Sealed by sealing ring 13.The inner chamber of cathode tube 4 is divided into electric flocculation room 41 and solarization air cell 42 by insulation board 11.Anode stub 3
Bottom removably be embedded at insulation board 11 middle part, for supporting fixed anode rod 3.Offered on insulation board 11 some equal
The tap hole 110 of even distribution, tap hole 110 connect with passage 7, for enabling the waste water in solarization air cell 42 to electric flocculation room
41 circulations, 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.Absolutely
Iron carbon ball filler 15 is stacked on listrium 11, for carrying out micro-electrolysis reaction, the iron carbon to the heavy metal wastewater thereby in electric flocculation room 41
The packed height of ball filler 15 is the 1/4 to 1/3 of the height of cathode tube 4.
In above-described embodiment, the lower end of electric flocculation room 41 has a 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 pacified
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
Sealed between 23 by sealing ring 13.The upper end of body 22 is detachably fastenedly connected with upper cover plate 21 also through bolt 12, goes out liquid
Mouth 8 is opened on body 22, and liquid valve door 18, inlet 9, cleaning sewage draining exit 230 and air inlet are provided with the liquid outlet 8
Mouth 16 is opened on bottom plate 23, and upper cover plate 21 is flexibly connected with rotary drag device 14 by bearing.Specifically, body 22
Upper and lower end is respectively provided with the 3rd connecting portion 220 of annular broadside, first connecting portion 410, the second connecting portion of the upper end of solarization air cell 42
420 are connected between insulation board 11 by stainless steel bolt 12, the 3rd connecting portion 220 and upper cover plate 21 of the upper end of body 22 it
Between connected also through bolt 12, 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 also lead to
Bolt 12 is crossed to be 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
It is to be detachably connected between insulation board 11, facilitates disassembly, cleaning.
In above-described embodiment, rotary drag device 14 includes circular slab 141, scraper 142, reducing motor 143, motor
Fixed mount 144 and motor contact 145.It is flexibly connected between upper cover plate 21 and circular slab 141 by bearing, makes circular slab
141 can rotate around its center axis, and scraper 142 is fixed on the lower end periphery of circular slab 141, and is contacted with the inwall of cathode tube 4,
The scraper 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 circle
On shape plate 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,
Reducing motor 143 is arranged on motor fixing frame 144, and its output shaft is fixedly connected with motor contact 145.So, may be used
Circular slab 141 is driven to rotate by reducing motor 143, so as to make scraper 142 rotate to adhering on the inwall of cathode tube 4
Heavy metal deposition thing is struck off, easy to clean；And uviol lamp 17 also can be with rotation so that radiation of the uviol lamp to waste water
It is better, 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 are kept it turned on, and open liquid flowing valve 62, start infusion pump 61, so as to which 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 rotates in cathode tube 4, and the waste water in cathode tube 4 just starts have aeration and rotation in electrolysis
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 aeration to
Oxygen is supplied in waste water, the heavy metal and organic wastewater entrainment of tiny bubble flow through the insulation board 11 provided with tap hole and form turbulent flow
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
And 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 generate Fe3+Also flocculation can be played and remove colloid pollution thing etc..
It is the reaction that this electric flocculation anode and negative electrode occur below：
(1) micro-electrolysis reaction occurs after waste water contacts 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.
Anode and cathode conductive capability will be had a strong impact on after the inner wall surface of cathode tube 4 adheres to upper metal simple-substance, reduces electrolysis effect
Rate and generation H2O2Ability, now rotary drag device 14 can will be attached to cathode tube 4 in the utility model after cell reaction
Heavy metal deposition thing on inwall is struck off, and ensures that anode and cathode electrolysis is good.It is attached in rotation to strike off negative electrode for revolving scraper simultaneously
Also drive uviol lamp to rotate while thing and stir waste water, be uniformly distributed waste strength, reduce concentration polarization.It is and ultraviolet
The irradiation of lamp can further promote fenton reactions to accelerate, and improve the degradation efficiency of sewage, treatment effect further adds
By force.And caused metal ion is hydrolyzed in water, polymerize, a series of multinuclear hydrolysates, this kind of hydrogen in statu nascendi oxide are generated
Active height, adsorption capacity are strong, are good flocculants, with the colloid in raw water, suspension, soluble pollutants, bacterium, virus
Larger flock is generated Deng combining, is removed through precipitation, air supporting.Meanwhile power supply uses the incorgruous power supply of both positive and negative polarity, i.e., positive pole with
The upper end of anode stub 3 is accessed, and negative pole accesses with the lower end of cathode tube 4, makes the CURRENT DISTRIBUTION formed in both positive and negative polarity cavity evenly, can have
Effect ground improves the electrolytic efficiency of heavy metal containing wastewater treatment, and structure of the present utility model is detachable connection, and it is tied
Structure is simple, dismantles with easy to clean, and water treatment effect is excellent.
Now with batch (-type) can handle.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 forms turbulent flow, enhancing by the insulation board 11 with tap hole 110
Stirring makes electrolysis evenly simultaneously.
To sum up above-mentioned, the electric flocculation unit 100 of the utility model embodiment is placed in using the anode stub 3 in cylinder is in
In the cathode tube 4 of hollow circle tube so that when cell reaction occurs, CURRENT DISTRIBUTION is more uniform, and electrolytic efficiency is more preferable, so as to
Water treatment effect can be made more preferable；Using rotary drag device 14 to the heavy metal deposition thing that adheres on the inwall of cathode tube 4
Struck off, avoid metal attachment negative electrode inside pipe wall from causing electric conductivity to decline, the problem of electrolytic efficiency is low, extend anode and cathode and use
In the life-span, treatment effeciency is improved, save electric energy；The structure of electric flocculation unit 100 is easy to clean and tieed up by detachable connection
Shield；It is stirred by aerator 10 and revolving scraper device 14 in the cathode tube 4, effectively prevents concentration polarization, waste water is dense
Degree is uniformly distributed, and electrolysis effectiveness is excellent；Catalytic reaction is further strengthened by ultra violet lamp, scavenging effect is more thorough；Pass through
Liquid transporting body 6 conveys liquid and forms circulating reflux, and it can aid in stirring in the case where aeration is bad, make processing more equal
Even, effect is more excellent.
Shown in Fig. 5, the utility model embodiment additionally provides a kind of electric flocculation device 400, and it includes some above-mentioned electricity
Flocculation unit 100, waste pipe 200 and reservoir 5.Electric flocculation unit 100 is arranged on support 1 with reservoir 5, waste water
Pipeline 200 is connected with reservoir 5, and some electric flocculation units 100 are connected by waste pipe 200, is formed in parallel or series, so that
Can be according to the content of beary metal flexible modulation handling process of waste water to be handled.When in parallel, electric flocculation behaviour can be carried out simultaneously
Make, increase treating capacity.Such as when series connection, next electric flocculation unit is delivered to after the completion of an electric flocculation unit 100 is electrolysed
100 continue to be electrolysed, and make electrolysis treatment effect more preferable.
As shown in fig. 6, the utility model embodiment additionally provides a kind of heavy metal waste water treatment system, it includes above-mentioned
Electric flocculation device 400, air-floating apparatus 500 and ion interchange unit for removing removing heavy metals scum silica frost and large granular impurity
600.The electric flocculation device 400, air-floating apparatus 500 and ion interchange unit 600 are sequentially connected in series, electric flocculation device 400 with
Ion interchange unit 600 connects, for being reprocessed to the concentrated water after processing.The heavy metal waste water treatment system first will
Waste water containing heavy metal is by the metal simple-substance and macromolecular agglutinating matter in the settled wastewater of electric flocculation device 400, afterwards
Removing heavy metals scum silica frost and large granular impurity are gone by air-floating apparatus 500 again, realized finally by ion interchange unit 600 up to standard
Discharge, the equipment that the system uses is few, and water treatment effect is excellent, there is good market popularization value.
Experimental result data to be made by taking certain waste water from plating plant as an example using above-mentioned utility model 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 in residence time 1.5h
Standard.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
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 and the liquid conveyor for being delivered to waste water in the cathode tube that deposit is struck off
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
Sealed connection is unloaded, 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 electrically connects with the anode stub upper end, the power supply
The negative pole of module electrically connects with the cathode tube lower end, is formed between the negative electrode tube cavity and the anode stub and is circulated for waste water
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
The inlet of conveying mechanism connection, sewage draining exit and the air inlet being connected with the aerator are cleaned, can in 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 removably on the insulation board, offers some equally distributed tap holes, institute on the insulation board
State tap hole to connect with the passage, the aerator is arranged in the solarization air cell, is 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 be cased with waterproof insulation suprasil outside the uviol lamp
Glass tube, the uviol lamp are 254-365nm, power bracket 50-100W from wave-length coverage.
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
Upper cover plate is stated 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, and 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, and 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 are 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, on the bracket, the waste pipe is with storing up for the electric flocculation unit installation
Liquid bath connects, and is connected between some described electric flocculation units by the waste pipe, and form 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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| Application Number | Priority Date | Filing Date | Title |
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| CN201720981814.7U CN207192884U (en) | 2017-08-07 | 2017-08-07 | A kind of electric flocculation unit, electric flocculation device and heavy metal waste water treatment system |
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| CN201720981814.7U CN207192884U (en) | 2017-08-07 | 2017-08-07 | A kind of electric flocculation unit, electric flocculation device and heavy metal waste water treatment system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113860676A (en) * | 2021-10-20 | 2021-12-31 | 哈尔滨工业大学（深圳） | Method for removing degradation-resistant organic matters in polluted bottom mud and application |
| 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 |
-
2017
- 2017-08-07 CN CN201720981814.7U patent/CN207192884U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113860676A (en) * | 2021-10-20 | 2021-12-31 | 哈尔滨工业大学（深圳） | Method for removing degradation-resistant organic matters in polluted bottom mud and application |
| CN113860676B (en) * | 2021-10-20 | 2023-01-17 | 哈尔滨工业大学（深圳） | Method for removing degradation-resistant organic matters in polluted bottom mud and application |
| 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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