CN206799359U - A kind of pigment industry high-salt wastewater reclamation set - Google Patents
A kind of pigment industry high-salt wastewater reclamation set Download PDFInfo
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Abstract
The utility model discloses a kind of pigment industry high-salt wastewater reclamation set, decoloration device, equipment for separating liquid from solid, adsorbent equipment, oxidation unit, pH adjusting meanss, milipore filter, NF membrane, reverse osmosis membrane, electrodialysis plant and vaporising device are included in device.During using the device, after waste water first passes around decolouring, separation of solid and liquid, absorption, oxidation processes, then by pH made basic states, for reacted water by ultrafiltration membrane treatment, milipore filter concentrated water returns to pH regulating reservoirs, and fresh water enters nanofiltration membrane treatment；NF membrane output fresh water enters reverse osmosis membrane, the concentration reuse of output concentrated water；Reverse osmosis membrane concentrated water enters electric dialyzator, and electrodialysis fresh water backflow is intake as reverse osmosis membrane, and electrodialysis concentrated water is evaporated into evaporator；Steam caused by evaporation can be back to pigment production, and the solid of evaporation and concentration can be used as technical grade salt；Water pollutant is not discharged in whole process.
Description
Technical field
The utility model belongs to film field of engineering technology, is related to a kind of pigment industry high-salt wastewater reclamation set.
Background technology
Pigment is a kind of coloring matter for having and decorating with protective effect.With the development of society, pigment is extensively applied, face
More and more important role is played the part of in material industry in economic construction.According to the difference of molecular structure and composition, pigment can be divided into
Organic pigment, inorganic pigment and metallic pigments.Wherein organic pigment is relative with for other pigment, having tinctorial strength height, face
The advantages such as color is bright-coloured, kind diversification, bright color is comprehensive, toxicity is low.It is widely used in printing-ink, plastics, rubber, painting
The coloring field of material.In the international current world wide of organic pigment industrial profile, the overall consumption of organic pigment has broken through 210,000
Ton, wherein most is azo pigment, accounts for 60% ratio；Phthalocyanine pigment occupies second, occupies 35% ratio.It is domestic
Organic pigment industrial profile with conservation culture concept generation, organic pigment in 20th century the fifties start to sprout in China
Bud.With china's overall national strength enhancing and science and technology progress, no matter in manufacturing enterprise's quantity, manufacturing enterprise's scale also
It is all to be improved in the total quality level of organic pigment.The organic pigment product that China develops and produced up to now
Kind sum has broken through 80, and production is in the trend risen year by year.
Pigment is widely used in the industries such as coating, ink, printing and dyeing, plastic products, papermaking, rubber and ceramics,
And the utilization rate of these pigment is with the difference of application method, from 50% to 98%.Organic pigment refers to color and other one
Serial pigment characteristic, by organic compound material into a kind of pigment.The difference of organic pigment and dyestuff is it with being colored
Body does not have affinity, and organic pigment only is attached into body surface by adhesive or film forming matter, or is mixed in interior of articles,
Colour object.Pigment manufacturing process and produce substantial amounts of waste water using process, it has also become important pollution sources.Most of pigment
It is various, complicated for artificial synthesized arene compound, species.Pigment may be used greatly during production application
The acid or alkali of amount, so that the acid-base value of waste water changes greatly.Meanwhile from raw material to finished pigment during often operate it is numerous
Miscellaneous, side reaction is more, is lost in serious, and so as to cause complicated component in waste water, biodegradability is poor.Further, since pigment type is more,
Complicated, production process has intermittence, causes waste water quality fluctuation larger, it is difficult to handle.Toxicity is big, and environmental pollution is tight
Weight.Most pigment and Pigment Intermediates all have carcinogenic, teratogenesis, mutagenic effect, bio-toxicity is big, some pigment varieties by
It is classified as the preferential chemical material of carcinogenicity test.Simultaneously as pigment is widely used, the pigment and pigment being discharged into environment
Intermediate causes very serious pollution to environment, and difficulty of governance is very big.The chemical property of most of pigment is stable, knot
Structure is complicated, has carcinogenic, teratogenesis, mutagenic three-induced effect to people and other biological, bio-toxicity is larger, either azo face
Material or anthraquinone and triphenylmethane pigments, it has been found that three-induced effect, bio-toxicity are very big, due to pigment production and make
It is low with cost, and without suitable substitute, cause the use of this kind of pigment to remain incessant after repeated prohibition, to ecological environment and human health
Influence very big.The production of AZOpigments and usage amount are maximum in all pigment, and some AZOpigments have been shown to
Cause human bladder carcinoma, spleen knurl, liver cancer and the nucleic acid exception of experimental animal and the chromosomal variation of mammal, azo face
The degradation process of material is likely to be first to be broken azo group by azo reductase, generation aniline category matter, and such material
Biological carcinogenic, teratogenesis, mutagenic effect it is even more serious.Although the processing of pigment wastewater produces along with the development of pigment industry
The new method of mass efficient, new technology.Various pigment wastewaters pass through different processing, and being substantially all can qualified discharge.So
And qualified discharge is not meant to cause environment pollution, a large amount of poisonous and harmful substances can not be ring in pigment wastewater
Border is decomposed, and is accumulated in the environment, finally jeopardizes the existence of the mankind.
Organic pigment production waste water has high COD, high chroma, high salinity, along with waste water intermittent discharge, water quality and quantity
Change over time larger, belong to organic matter indegradable industrial effluent.At present, the main method for handling this kind of waste water both at home and abroad has：
Charcoal absorption, biodegradation, ion exchange, solvent extraction, UF membrane, chemical oxidation, electrodialysis, flocculence etc..Handle face
The technique of material waste water has iron dust filtration-anaerobism-SOFB- aerobic, oxidation-biochemistry-air supporting, coagulation-stripping-neutralization flocculation-contact
Oxidation-biological carbon, but effluent quality is unable to reach reuse requirement.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of handling process to pigment enterprise wastewater, while can incite somebody to action
The separation and recovery of two kinds of monovalent salts is so as to realizing the processing of waste water and reuse in waste water.
The first aspect of the invention：
A kind of pigment industry high-salt wastewater reuse method, comprises the following steps：
1st step, decolorization is carried out to waste water；
2nd step, the waste water after decolorization carry out separation of solid and liquid processing, remove solid impurity；
3rd step, the waste water after handling the 2nd step is adsorbed successively and oxidation processes, removes COD；
4th step, the waste water obtained to the 3rd step carry out pH and adjusted to 8.5~12；
5th step, the waste water obtained to the 4th step carry out hyperfiltration treatment, and ultrafiltration concentrated water is back to the processing of the 4th step；
6th step, nanofiltration processing is carried out to the penetrating fluid of ultrafiltration, separates CH3COO-And Cl-, nanofiltration concentrated water return pigment production
Process；
7th step, reverse-osmosis treated is carried out to the penetrating fluid of nanofiltration；
8th step, electrodialysis concentration is carried out to the concentrated water of counter-infiltration, electrodialysis concentrated water is sent into evaporative crystallization processing, electricity
Dialysis fresh water is back to the reverse-osmosis treated in the 7th step；
Contain CH in described waste water3COO-And Cl-。
Described waste water COD scope is 1000~20000mg/L；Conductivity range is 20~200ms/cm；CH3COO-'s
1000~20000mg/L of content； Cl-500~15000mg/L of content.
In the 1st described step, decolorization is to use Fe-C micro electrolysis method.
In the 2nd described step, described separation of solid and liquid be selected from centrifugation mode, expression separation mode, filter type,
Floating separate mode or sedimentation separation mode.
In the 3rd described step, adsorption treatment refers to macroporous absorbent resin absorption or charcoal absorption；Oxidation processes refer to
Ozone oxidation, electrochemical oxidation, photochemical oxidation, CWO or Fenton oxidation.
In the 5th described step, the Average Pore Size of UF Membrane of use can be 5nm~50nm, or be for molecular cut off
1000~200000Da film；In the step of described ultrafiltration, temperature is between 5~70 DEG C；Pressure is between 0.05~1Mpa；
Crossflow velocity is between 0.5~10m/s.
In the 6th described step, the material of NF membrane is selected from polyamide, polyimides, cellulose acetate, SPSF, sulphur
Change polyether sulfone or polyvinyl alcohol etc..
In the 8th described step, described electrodialytic condition of work is 50~250V of operating voltage, 1~3A of current strength.
The second aspect of the invention：
A kind of pigment industry high-salt wastewater reclamation set, includes：
Decoloration device, for carrying out decolorization to waste water；
Equipment for separating liquid from solid, decoloration device is connected to, for carrying out separation of solid and liquid processing to waste water；
Adsorbent equipment, equipment for separating liquid from solid is connected to, adsorption-edulcoration processing is carried out for the production water to equipment for separating liquid from solid；
Oxidation unit, adsorbent equipment is connected to, oxidation processes are carried out for the production water to adsorbent equipment；
PH adjusting meanss, are connected to oxidation unit, for adjust oxidation unit production water pH to alkalescence；
Milipore filter, pH adjusting meanss are connected to, for handling waste water filtering；The concentrated water side of milipore filter is connected to pH regulations
Device；
NF membrane, the per-meate side of milipore filter is connected to, for carrying out separation CH to milipore filter production water3COO-And Cl-At separation
Reason；
Reverse osmosis membrane, the per-meate side of NF membrane is connected to, concentration is carried out for the production water to NF membrane；
Electrodialysis plant, the concentrated water side of reverse osmosis membrane is connected to, is further concentrated for the concentrated water to reverse osmosis membrane；
The dilute side of electrodialysis plant is connected to the influent side of reverse osmosis membrane；
Vaporising device, electrodialysis plant is connected to, for making evaporative crystallization processing to the concentrated water of electrodialysis plant.
Described decoloration device is selected from Fe-C micro electrolysis tower.
Described equipment for separating liquid from solid is selected from centrifugal separating device, expression separation device, filter, floating separator
Or one or more of combinations in settling separation device.
Described adsorbent equipment is selected from the absorption of macroporous absorbent resin tower or activated carbon adsorber.
Described oxidation unit is selected from ozone-oxidizing device, Electrochemical oxidation device, photochemical oxidation device, catalytic wet
Oxidation unit or Fenton oxidation device.
Described Average Pore Size of UF Membrane is 5nm~50nm, or is that molecular cut off is 1000~200000Da.
The material of described NF membrane is selected from polyamide, polyimides, cellulose acetate, SPSF, sulfonated polyether sulfone
Or polyvinyl alcohol.
The third aspect of the invention：
NF membrane CH in solution is separated3COO-And Cl-In application.
The pH scopes of solution are 8.5~12.
CH3COO-1000~20000mg/L of content； Cl-500~15000mg/L of content.
During nanofiltration separation, 10~40 DEG C of feed temperature scope, the operating pressure scope of nanofiltration is 1.0~3.5Mpa.
The material of NF membrane is selected from polyamide, polyimides, cellulose acetate, SPSF, sulfonated polyether sulfone or poly- second
Enol etc..
Beneficial effect
1st, using this method, the fresh water outlet water quality of NF membrane and reverse osmosis membrane is excellent, real available for pigment production technique
Now complete reuse.Reverse osmosis membrane water outlet can be used for the purposes of the hyposaline water such as agricultural irrigation, landscape water.The concentration of nanofiltration
Liquid can put into production as buffer solution again.Salt content is small compared with water caused by high electrodialysis concentrated water, after directly evaporating, steams
Vapour can reuse make printing and dyeing process steam.Waste water can realize complete-reclaiming, not outer to arrange.
2nd, effectively pollution and blocking to film surface can be avoided by heavy-metal ion removal in the high PH of regulation of early stage,
Reverse osmosis process selects HERO techniques simultaneously.For conventional reverse osmosis technique, its advantage has：（1）It is stable,（2）
Operating cost is low,（3）Investment cost is low,（4）Lower space,（5）Preparation and wastewater treatment suitable for high purity water,
（6）Without complicated cleaning, without adding antisludging agent.Greatly reduce old.
3rd, by the experimental selection to two kinds of counter-infiltrations and four kinds of nanofiltrations, successfully it is found that a kind of NF membrane can realize two
The separation of kind of monovalent salt and traditional film process is difficult that two kinds of monovalent salts are separated, for CH3COO-Rejection be up to 90~98%,
And for Cl-Rejection be 10~20%, effectively realize waste water recycling.
Brief description of the drawings
Fig. 1 is the installation drawing of the use of the present invention.
Embodiment
The characteristics of present invention waste water to be dealt with comes from pigment production technique waste water, and its is main is with high salt, height
COD, high color value；Such as in the production of yellow 14 pigment of face, due to can add the raw materials such as acetic acid and sodium acetate as buffer with
Sodium hydroxide reacts, and can produce containing more CH3COO-And Cl-Waste water, this effluent part is difficult to further separating treatment,
Lead to not by the resource of waste water all of.
Therefore, the present invention proposes a kind of processing method of new pigment wastewater, can be complete by the resource in pigment wastewater
Reclaim in portion.The water quality situation of present invention pigment wastewater to be dealt with is mainly：COD scopes are 1000~20000mg/L；Conductance
Rate scope is 20~200ms/cm；CH3COO-1000~20000mg/L of content； Cl-500~15000mg/L of content, its
It is remaining to also have Na+Ion.
Processing method of the present invention carries out decolorization firstly the need of to waste water, and discoloration method here can use iron charcoal
Light electrolysis, the filler and raw water mainly combined using iron, charcoal are reacted, and destroy the molecular structure and its property of former Organic substance in water
Matter, its principle are：Iron is different from the corrosion potential of charcoal, and iron makees anode, charcoal makees negative electrode, raw water makees electrolyte and forms thousands upon thousands
Individual galvanic cell., it is necessary to which the pH value that acid adding controls to adjust waste water in pond is 4~6 during Fe-C micro electrolysis, gained waste water enters
In Fe-C micro electrolysis pretreatment pool, it is aerated in Fe-C micro electrolysis pretreatment pool, it is 2~3mg/L to control its dissolved oxygen, waste water
Hydraulic detention time is 0.5~2h；Fe-C micro electrolysis filler is made up of iron filings, Powdered Activated Carbon, iron filings and Powdered Activated Carbon
Weight ratio is 5.6:1~5.7：1.
Waste water after Fe-C micro electrolysis needs to handle by separation of solid and liquid, on the one hand can remove the solid particle in waste water
Deng impurity, the iron powder that on the other hand can bring Fe-C micro electrolysis/powdered carbon removes.Here the mode of separation of solid and liquid, does not have
It is particularly limited to.As the method for specific separation of solid and liquid processing, centrifugation mode, expression separation mode, filtering side can be enumerated
Formula, floating separate mode, sedimentation separation mode.As the mode of centrifugation, horizontal continuous centrifuge (spiral can be illustrated
Decanter processing), the board-like centrifugal separator of separation, filter centrifugal, tall building Pu Lesi type UCF ultracentrifuges, be used as filtering side
Formula, band filter, belt press, flypress, precoat filter, filter press can be illustrated, can be with as floating separate mode
Continuous floating separator is illustrated, as sedimentation separation mode, aggegation sedimentation separation machine, rapid sedimentation separation machine can be illustrated
Deng, but it is not particularly limited in above-mentioned any one.More preferably mode is first to be filtered using belt filter, then uses cyclonic separation
Device carries out filtration treatment.
Waste water after separation of solid and liquid, successively by absorption and oxidation processes, it is the further COD for reducing waste water that it, which is acted on,
The pollution of milipore filter can be avoided.Charcoal absorption or macroporous absorbent resin can be used used herein of adsorption process, this
In the processing of oxidation refer to ozone oxidation, electrochemical oxidation, photochemical oxidation, CWO or Fenton oxidation.It is right
Except the waste water after COD is adjusted to pH alkalescence, then ultra-filtration and separation processing is carried out, big molecular impurity therein can be removed, ultrafiltration
Concentrate is back to regulation pH processing, and the permeate of ultrafiltration is sent into nanofiltration process and carries out separating treatment to monovalent ion.
Adjust to alkalescence, can be significantly improved in nanofiltration process to CH in the pH to waste water3COO-And Cl-Point
From effect, CH3COO-It is trapped, and Cl-Through NF membrane；The material of NF membrane can be selected from polyamide, polyimides, acetic acid
Cellulose, SPSF, sulfonated polyether sulfone or polyvinyl alcohol etc..The model of NF membrane is selected from GE companies DL films.The concentration of nanofiltration
Liquid contains larger CH3COO-, can be used for being sent into pigment manufacturing process being used as buffer solution reuse.The permeate of nanofiltration is main
Contain Cl-, be sent into reverse osmosis unit and make further concentration, the production water of counter-infiltration as purified water can with reuse, counter-infiltration
Concentrate is sent into electrodialysis plant and made after further concentrating, can be with after being sent into vaporising device and be evaporated concentration, crystallizing
Obtain Nacl, the steam in evaporation process can reuse in process of production.
The device that the present invention uses is as shown in figure 1, include：
Decoloration device, for carrying out decolorization to waste water；
Equipment for separating liquid from solid, decoloration device is connected to, for carrying out separation of solid and liquid processing to waste water；
Adsorbent equipment, equipment for separating liquid from solid is connected to, adsorption-edulcoration processing is carried out for the production water to equipment for separating liquid from solid；
Oxidation unit, adsorbent equipment is connected to, oxidation processes are carried out for the production water to adsorbent equipment；
PH adjusting meanss, are connected to oxidation unit, for adjust oxidation unit production water pH to alkalescence；
Milipore filter, pH adjusting meanss are connected to, for handling waste water filtering；The concentrated water side of milipore filter is connected to pH regulations
Device；
NF membrane, the per-meate side of milipore filter is connected to, for carrying out separation CH to milipore filter production water3COO-And Cl-At separation
Reason；
Reverse osmosis membrane, the per-meate side of NF membrane is connected to, concentration is carried out for the production water to NF membrane；
Electrodialysis plant, the concentrated water side of reverse osmosis membrane is connected to, is further concentrated for the concentrated water to reverse osmosis membrane；
The dilute side of electrodialysis plant is connected to the influent side of reverse osmosis membrane；
Vaporising device, electrodialysis plant is connected to, for making evaporative crystallization processing to the concentrated water of electrodialysis plant.
The water quality of pigment wastewater employed in following examples is as follows：
COD 6250mg/L, Cl- 6134mg/L, CH3COO-, 9958mg/L, electrical conductivity 46.425ms/cm.
The waste water nanofiltration simulated test of embodiment 1
Laboratory configures 1000mg/L CH3COONa and 1000mg/L NaCl mixed solutions.Employ four kinds of NF membranes
It is GE DL NF membranes, GE DK NF membranes, Tao Shi NF90 NF membranes, Tao Shi NF270 NF membranes and a kind of reverse osmosis respectively
Permeable membrane TRISEP companies X-20 reverse osmosis membranes carry out separating experiment.25 DEG C of separation process temperature, operating pressure are 1.5 MPa.
Employ 5 kinds of NF membranes of the above and separation test is carried out under the conditions of pH10.5, obtained rejection is as shown in the table：
Under the conditions of different pH, NF membrane DL is to Cl-And CH3COO-Rejection is as shown in the table：
Simulation pigment wastewater nanofiltration feed separation is handled using nanofiltration, investigates salinity in waste water, pH and operation pressure
The influence of power etc..Research shows, two kinds of monovalent salts can not be all separated to wastewater treatment using a series of nanofiltration counter-infiltration, and
Certain specific NF membrane of GE companies improves respectively for the rejection of NaAc and NaCl solution with pH rising, PH=
Rejection when 8.5~14 for NaAc is higher than 96%, and is trapped in 65% or so to NaCl, its reason speculate be probably because
With PH rise, film surface electrical behavior enhancing road south effect, which improves, then to be increased the rejection of salt.As NaAc in salt-mixture waste water
During 10~1000mg/L each with NaCl, NaAc rejection is 90~98%, and NaCl rejection is 10~20%, it is possible to achieve
Two kinds of salt efficiently separates reuse, its reason speculate be probably because the competition mechanism of salt and the structure of salt, although acetate from
Son is identical with the radius of chlorion, but acetate ion is into stereochemical structure and is more prone to retain than chlorion, logical at the two
There is the separation that competition mechanism results in the two salt while mistake again.Increase to NaAc content 9965mg/L when mixing salinity,
During NaCl content 6625mg/L, the rejection of salt-mixture is because concentration polarization phenomenon causes to slightly decrease still NaAc rejections and appointed
So it is maintained at more than 90%.Under conditions of high salt concentration, the rejection of salt is improved by increasing pressure, but when pressure is excessive
When not obvious increase of rejection, so operating pressure scope is in 0.5MPa~3MPa.Carry out under these conditions economical
Efficient feed separation.
The processing of the pigment production waste water of embodiment 2
Acid for adjusting pH is added to be aerated, it is 2~3mg/L to control its dissolved oxygen, is sent into iron to 4~6 pigment production waste water
Decolorization is carried out in charcoal light electrolysis tank, Fe-C micro electrolysis filler is made up of iron filings, Powdered Activated Carbon, iron filings and Powdered Activated Carbon
Weight ratio be 5.6:1, COD 3705mg/L after processing, decolouring waste water, which enters in Aerobic Pond, carries out biochemical treatment, and it is heavy to be re-fed into
Shallow lake pond carries out sedimentation separation of solid and liquid, is re-fed into microfiltration membranes and is further filtered.The production water of microfiltration membranes passes sequentially through activated carbon
After absorption and ozone Oxidation Treatment, waste water COD 430mg/L, after adjusting pH to 10.0, it is sent into milipore filter and makees depth-type filtration, use
The molecular cut off scope of milipore filter be 50,000 Da, 30 DEG C of ultrafiltrate temperature, the MPa of ultrafiltration pressure 0.3；Milipore filter concentrated water is returned
PH regulations are back to, ultrafiltration production water, which is sent into NF membrane, to be filtered, and separates CH3COO-And Cl-, 25 DEG C of nanofiltration temperature, nanofiltration pressure
1.4MPa, CH3COO-Rejection 92%, Cl-Rejection 17%, obtain containing substantial amounts of NaCl nanofiltration production water and containing height
The nanofiltration concentrated water NaAc solution of concentration（15%NaAc solution）, nanofiltration concentrated water NaAc solution as buffer solution come back to technique life
In production, nanofiltration production water is sent into counter-infiltration and concentrated, and the effluent quality NaCl contents of counter-infiltration are less than 300mg/L, COD about 8mg/
L, water quality is excellent can be back to industrial production, and NaCl contents enter electrodialysis depth higher than the concentrated water of 60000mg/L counter-infiltrations
Degree processing, electrodialytic fresh water return to reverse osmosis units and handled again, and electrodialytic concentrated water is sent into evaporator and is evaporated, crystallizes
Afterwards, evaporation water is back to industrial production, is recycled NaCl, its purity about 90%.
Claims (7)
1. a kind of pigment industry high-salt wastewater reclamation set, it is characterised in that include：
Decoloration device, for carrying out decolorization to waste water；
Equipment for separating liquid from solid, decoloration device is connected to, for carrying out separation of solid and liquid processing to waste water；
Adsorbent equipment, equipment for separating liquid from solid is connected to, adsorption-edulcoration processing is carried out for the production water to equipment for separating liquid from solid；
Oxidation unit, adsorbent equipment is connected to, oxidation processes are carried out for the production water to adsorbent equipment；
PH adjusting meanss, are connected to oxidation unit, for adjust oxidation unit production water pH to alkalescence；
Milipore filter, pH adjusting meanss are connected to, for handling waste water filtering；The concentrated water side of milipore filter is connected to pH regulation dresses
Put；
NF membrane, the per-meate side of milipore filter is connected to, for carrying out separation CH to milipore filter production water3COO-And Cl-Separating treatment；
Reverse osmosis membrane, the per-meate side of NF membrane is connected to, concentration is carried out for the production water to NF membrane；
Electrodialysis plant, the concentrated water side of reverse osmosis membrane is connected to, is further concentrated for the concentrated water to reverse osmosis membrane；Electric osmose
The dilute side of analysis apparatus is connected to the influent side of reverse osmosis membrane；
Vaporising device, electrodialysis plant is connected to, for making evaporative crystallization processing to the concentrated water of electrodialysis plant.
2. pigment industry high-salt wastewater reclamation set according to claim 1, it is characterised in that described decoloration device choosing
From Fe-C micro electrolysis tower.
3. pigment industry high-salt wastewater reclamation set according to claim 1, it is characterised in that described separation of solid and liquid dress
Put one kind in centrifugal separating device, expression separation device, filter, floating separator or settling separation device
Or several combination.
4. pigment industry high-salt wastewater reclamation set according to claim 1, it is characterised in that described adsorbent equipment choosing
From the absorption of macroporous absorbent resin tower or activated carbon adsorber.
5. pigment industry high-salt wastewater reclamation set according to claim 1, it is characterised in that described oxidation unit choosing
Filled from ozone-oxidizing device, Electrochemical oxidation device, photochemical oxidation device, CWO device or Fenton oxidation
Put.
6. pigment industry high-salt wastewater reclamation set according to claim 1, it is characterised in that described milipore filter is averaged
Aperture is 5nm~50nm, or is that molecular cut off is 1000~200000Da.
7. pigment industry high-salt wastewater reclamation set according to claim 1, it is characterised in that the material of described NF membrane
Material is selected from polyamide, polyimides, cellulose acetate, SPSF, sulfonated polyether sulfone or polyvinyl alcohol.
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| CN107235534A (en) * | 2017-06-06 | 2017-10-10 | 南京工业大学 | A kind of nanofiltration separation method of monovalence mixed salt solution |
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