CN105174565B - Acrylic fiber wastewater deep treatment method - Google Patents
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Abstract
The invention belongs to petrochemical industry production wastewater treatment field, more particularly to a kind of acrylic fiber wastewater deep treatment method, include the following steps：（1）By acrylic fiber wastewater after mixing channel is uniformly mixed with electrolyte, then send to catalytic electrolysis device and carry out electrolysis processing；（2）By step（1）Gained liquid is sent into clarifying basin and carries out flocculation sediment, then removes impurities in water through cartridge filter；（3）By step（2）Gained liquid is sent into membrane separation assemblies and is purified water；Concentrate partial reflux enters catalytic electrolysis device；Catalytic electrolysis device anode material is nano-catalytic inert electrode；Substrate is titanium plate or plastic plate；The metal oxide containing precious metals catalyst coatings that top layer coating crystal grain is 10~45nm；The cathode is tabular, arc-shaped, cylindrical shape or netted.The present invention organically combines catalytic electrolysis technology, flocculation sediment technology and membrane separation technique, and cost is relatively low, and efficiency is higher.
Description
Technical field
The invention belongs to petrochemical industry production wastewater treatment field, more particularly to it is a kind of by catalytic electrolysis technology, flocculation sediment
The acrylic fiber wastewater deep treatment method that technology is organically combined with membrane separation technique.
Background technology
The dry acrylic fiber production technology generally use du pont company patented technology in China.The acrylic fibers product of method production
Bulkiness is good, warmth retention property is strong, soft, has good weatherability and mould proof, mothproof performance, be widely used in clothes and
The production and living fields such as decoration.Acrylic fiber production wastewater derives from each workshop section of production process, due to adding two in technical process
Methylformamide（DMF）, acrylonitrile（AN）, EDTA, nonylphenol polyoxyethylene ether etc. more than 20 plant raw material, it is again raw in the polymerization
Into the polyacrylonitrile of different molecular weight, therefore acrylic fibers waste water by dry process complicated component, pollutant load are more, intractability is big, are generation
One of extremely difficult biodegradable organic chemical waste water that boundary generally acknowledges.
At present, the universal thinking of research for acrylic fiber wastewater processing is first by the biodegradability for improving waste water and removal
The component of inhibitory action is played to biology, then the COD and ammonia nitrogen of water outlet are reduced subsequently through biochemical treatment.In acrylic fiber production process enterprise
In, processing acrylic fiber wastewater generally uses chemical method（Chemical coagulation, chemical oxidation, internal electrolysis）, bioanalysis（SBR methods, biology connect
Touch oxidizing process, biological fluidized bed, biological filtering tower combined working）, physical-chemical process（Micro porous filtration, absorption）Deng or using wherein certain or it is more
The group technology of kind method.Chinese invention patent CN104529092A discloses a kind of acrylic fiber wastewater processing system, and waste water is through adjusting
Pond regulating pondage and water quality are saved, removes scum silica frost into flotation tank is strengthened, then waste water enters ozone oxidation sedimentation basin, pollutant quilt
Oxygenolysis, enters back into deflector type anoxic anaerobic reation pool, aerobic contact oxidation pond carries out anoxic, anaerobic and aerobic reaction, warp
Discharged after precipitation and filtering.Chinese invention patent CN103043846A discloses a kind of method for handling acrylic fiber wastewater, right first
Acrylic fiber wastewater carries out ultrasound hydrolysis processing, by the oligomer in waste water and is difficult to biodegradable long-chain macromolecule and decomposes and drop
Solution, improves its biodegradability, subsequently into integral biological reaction tank, carries out denitrogenation, except carbon biological respinse, removes most of
COD and ammonia nitrogen, last integral biological reaction tank water outlet by the hardly degraded organic substance of Fenton techniques oxidation removal remnants, with
Ensure effluent quality.
Since a variety of chemical substances in acrylic fiber wastewater are extremely strong to microorganism toxic action, using conventional " materialization+life
The method processing acrylic fibers waste water by dry process of change " is difficult water outlet is reached discharge standard, is met efficient, energy saving, inexpensive and environmentally friendly etc.
Demand.This severe exacerbation water body environment of location, while the development of acrylic fiber industry also receives restriction.Therefore, normal
It is that water returns in acrylic fibers waste water by dry process qualified discharge or even realization that advanced treatment unit is further added on the basis of rule treatment process
Effective way.
Mainly there is the methods of Fenton reagent oxidizing process, Ozonation to the deep treatment method of acrylic fiber wastewater at present.
Fenton reagent oxidizing process has organic matter good degradation effect, can not only improve the biodegradability energy of waste water, can also incite somebody to action
Organic matter permineralization is CO2And H2O, but due to the ferrous sulfate and H that react2O2Dosage is larger, reaches treatment effect
Required wastewater treatment is costly afterwards；Acrylic fiber wastewater is handled using Ozonation, individually uses the ozone treatment time-division
The ozone of sub- state cannot remove substantial amounts of persistent organic pollutants and speed of action is slow, generally adds catalysis using ozone
Agent such as manganese dioxide or ozone method processing acrylic fiber wastewater united with activated carbon adsorption, the above method is costly, operation control
Make relatively complicated, be not suitable as acrylic fiber wastewater advanced treating measure.So to acrylic fiber wastewater deep treatment method and its device
Exploitation it is urgently to be resolved hurrily, with meet environmental protection and acrylic fiber industry development an urgent demand.
The content of the invention
It is an object of the invention to for wastewater discharge present in existing Acrylic fiber waste water treatment method it is big, be processed into
This height, treatment effeciency be low and the problems such as water resource waste, there is provided a kind of by catalytic electrolysis technology, flocculation sediment technology and UF membrane
Technology organically combines, and cost is relatively low, and efficiency is higher, by the further advanced treating of acrylic fiber wastewater after conventional processing technique is handled
The acrylic fiber wastewater deep treatment method of regeneration is realized afterwards.
In order to solve the above technical problems, what the present invention was realized in.
A kind of acrylic fiber wastewater deep treatment method, in turn includes the following steps.
（1）By acrylic fiber wastewater after mixing channel is uniformly mixed with electrolyte, then send to catalytic electrolysis device and carry out electrolysis processing.
（2）By step（1）Gained liquid is sent into clarifying basin and carries out flocculation sediment, is then gone through cartridge filter miscellaneous in water removal
Matter.
（3）By step（2）Gained liquid is sent into membrane separation assemblies and is purified water；Concentrate partial reflux enters catalysis electricity
Solve device.
As a preferred embodiment, catalytic electrolysis device anode material of the present invention is nano-catalytic inert electrode；Substrate
For titanium plate or plastic plate；The metal oxide containing precious metals catalyst coatings that top layer coating crystal grain is 10~45nm；The catalytic electrolysis device sun
Extremely tabular, arc-shaped, cylindrical shape or netted；The cathode material is graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium
Or metal alloy；The cathode is tabular, arc-shaped, cylindrical shape or netted.
Further, the operating voltage of catalytic electrolysis device two neighboring pole plate of the present invention is 5~20V；Current density is
20~400mA/cm2；Residence time of the waste water in catalytic electrolysis device is 15~60min.
Further, electrolyte of the present invention is sodium chloride or sodium sulphate；Electrolyte mass concentration in waste water is kept
0.3%~3.0%.
Further, flocculant is alum, aluminium polychloride, polyaluminum ferric chloride, polymerization in clarifying basin of the present invention
In aluminum sulfate, poly aluminium iron silicate, polymeric aluminum sulfate silicate, polyacrylamide, Sodium Polyacrylate or polyethyleneimine one or two with
On mixture；Flocculant dosage is 5~80ppm.
Further, the material for core of cartridge filter of the present invention is PP cottons, quartz sand, granular activated carbon, sintering
Mixture more than one or both of activated carbon；The filter core is using sintering chimney filter, fusion-jet type fabric filter element or honeycomb filter
Core.
Further, membrane separation assemblies of the present invention use plate membrane, rolled film, tubular membrane or hollow-fibre membrane；Institute
Membrane separation assemblies material is stated using the reverse osmosis membrane to sodium chloride rejection more than 95%.
Further, membrane separation assemblies of the present invention use plate membrane, rolled film, tubular membrane or hollow-fibre membrane；Institute
Membrane separation assemblies material is stated using the NF membrane to sodium sulphate rejection more than 95%.
Further, membrane separation assemblies operating temperature of the present invention is room temperature to 50 DEG C；Operating pressure for 0.5~
10MPa。
Processing system of the present invention includes such as lower part.
A, catalytic electrolysis system：Catalytic electrolysis system be used for through conventional biochemical treatment technology processing after acrylic fiber wastewater into
Row electrolysis, catalytic electrolysis system are equipped with shut-off valve, administration of electrolytes case, mixing channel, water supply pump, catalytic electrolysis device；Shut-off valve into
Mouth connection acrylic fiber wastewater secondary settling tank discharge outlet, cut-off valve outlet connection mixing channel add electrolyte for supplement；Water supply pump inlet
Mixing channel water outlet, the connection catalytic electrolysis device import of water supply pump discharge are connected, the water outlet of catalytic electrolysis device enters flocculation sedimentation system.
B, flocculation sedimentation system：Flocculation sedimentation system is used to removing planktonic organism in catalytic electrolysis device water outlet, bacterium, thin
The impurity such as small suspended matter, colloid, flocculation sedimentation system are designed, equipped with flocculation using condensation principle is contacted using integral structure
Agent dispensing kit and clarifying basin, clarifying basin water outlet are directly entered film separation system.
C, film separation system：Film separation system is used to remove bacterium remaining in flocculation sedimentation system clarifying basin water outlet, glue
The impurity such as body and dissolubility electrolyte is purified sewage, and concentrate flows back into catalytic electrolysis system, electrolyte therein
Realization recycles.Film separation system is equipped with shut-off valve, water supply pump, cartridge filter, booster pump, membrane separation assemblies, and successively
Connection.To prevent fouling membrane from influencing treatment effeciency, film separation system further includes Membrane cleaning regenerative system, equipped with backwashing pump, cuts
Only valve, time controller etc..
The present invention can obtain following effect using catalytic electrolysis device：（1）The chlorine produced with catalytic electrolysis（Or oxygen）Freely
Base kills the microorganism in waste water, reduces pollution of the microorganism to film separation system membrane material；（2）It is each in oxygenolysis waste water
Type organic, remaining color species fast decoupled, and reduce colourity and CODcr；（3）Make suspended matter, colloid, the band in waste water
Electric particulate agglomerates under electric field action forms larger particles.
The present invention can obtain following effect using film separation system：（1）In traps flocculated settling system clarifying basin water outlet
The impurity such as remaining bacterium, colloid and dissolubility electrolyte；（2）Realize that film separation system purified water repetitive cycling uses, it is full
Sufficient acrylic fiber production process process uses water water quality requirement；（3）Electrolyte, the reductions such as the sodium chloride in waste water, sodium sulphate is recycled to urge
Change electrolysis system electrolyte dosage, reduce processing cost.
Advanced oxidization method and the simple UF membrane such as the present invention and conventional Fenton reagent oxidizing process, Ozonation
Method compares, and has not only overcome defect of high cost, rambunctious, but also solves that treatment effect is undesirable, waste discharge contaminant water
The problems such as body, and waste can be become as resource, acrylic fiber wastewater is realized that repetitive cycling uses after advanced treating.The present invention
With following prominent characteristics.
（1）The rate of recovery of water can reach 70%~100%, operating cost less than conventional biochemical end individually add advanced oxidation or
The cost of membrane separation technique.
（2）Color species and hazardous contaminant that can be in rapid oxidation Decomposition Wastewater, decoloration detoxification efficiency be good, greatly
Width reduces gross contamination emission, is conducive to protect water body environment.
（3）The microorganism in waste water can be killed by catalytic electrolysis, the biological pollution of film is solved the problems, such as, improves making for film
With efficiency, extend the service life of film, reduce the replacement cost of film.
（4）Technological process is short, plant area is few, and device structure is compact, is particularly suitable for carrying out upgrading to existing apparatus changing
Make.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and detailed description.Protection scope of the present invention not only office
It is limited to the statement of following content.
Fig. 1 is the process flow chart of acrylic fiber wastewater deep treatment method of the present invention and its device.
Embodiment
As shown in Figure 1, the acrylic fiber wastewater after the processing of conventional biochemical treatment technology is uniform with electrolyte first in mixing channel
After mixing, catalytic electrolysis device is squeezed into by water supply pump, water outlet is into clarifying basin progress flocculation sediment after electrolysis, then through ensuring public security
Filter goes fine suspension in water removal, the impurity such as microorganism to enter film after being pressurized finally by booster pump to protect membrane module
Separation assembly removes the impurity such as remaining bacterium, colloid and dissolubility electrolyte and is purified water, concentrate partial reflux into
Enter catalytic electrolysis device, electrolyte therein is realized and recycled.
Embodiment 1.
The water inlet of acrylic fiber wastewater advanced treatment apparatus is the acrylic fiber wastewater after the processing of conventional biochemical treatment technology, its water quality refers to
Mark is as follows：CODcr 71.9 mg/L、NH3-N 22.5 mg/L、BOD5 6.3 mg/L、pH 6.98、CN-0.17 mg/L, third
Alkene nitrile（AN）0.30 mg/L、DMF 5.0 mg/L.
Uniformly mixed with sodium chloride electrolysis matter as shown in Figure 1, device is intake in mixing channel first, make the chlorination in waste water
Sodium mass concentration is maintained at 0.6%, and is squeezed into catalytic electrolysis device by water supply pump, and catalytic electrolysis device anode material is nanometer
Catalytically inactive electrode, substrate are titanium plate, and the precious metal oxide coating that top layer coating crystal grain is 20nm, cathode material is aluminium sheet,
Anode and cathode are planar electrode, and the operating voltage of two neighboring pole plate is 9V, current density 120mA/cm2, waste water exists
Residence time in catalytic electrolysis device is 30 min.Water outlet enters clarifying basin progress flocculation sediment after electrolysis, adds flocculant
For polyacrylamide, flocculant dosage is 20 ppm, and clarifying basin structure type uses mechanical accelerating purifying pool.Then via PP
Cotton, the cartridge filter of granular activated carbon composition remove fine suspension in waste water, the impurity such as microorganism to protect membrane module,
Filter core enters high frequency diaphragm piece-rate system (referring to application number using sintering chimney filter after being pressurized finally by booster pump：
201310690242.3 Chinese patent literatures) separate except the impurity such as remaining bacterium, colloid and dissolubility electrolyte, film point
Reverse osmosis plate membrane is used from system membrane separation assemblies, and operating temperature is room temperature, operating pressure 6MPa.Finally obtain purification
Water, concentrate partial reflux enter catalytic electrolysis device, and sodium chloride electrolysis matter therein is realized and recycled.
The water quality index of gained purified water is as follows after the processing of above-mentioned acrylic fiber wastewater advanced treatment apparatus：CODcr 15.7
mg/L、NH3-N 4.3 mg/L、BOD51.9 mg/L, pH 7.16, three poisonous and harmful characteristic contamination CN-, acrylonitrile
（AN）, DMF do not detect.In addition, the sodium chloride electrolysis matter rate of recovery is 96.1% in reverse osmosis concentrated liquid.
Embodiment 2.
The water inlet of acrylic fiber wastewater advanced treatment apparatus is the acrylic fiber wastewater after the processing of conventional biochemical treatment technology, its water quality refers to
Mark is as follows：CODcr 69.4 mg/L、NH3-N 23.8 mg/L、BOD5 8.4 mg/L、pH 7.02、CN-0.22 mg/L, third
Alkene nitrile（AN）0.29 mg/L、DMF 5.2 mg/L.
Uniformly mixed with sodium chloride electrolysis matter as shown in Figure 1, device is intake in mixing channel first, make the chlorination in waste water
Sodium mass concentration is maintained at 0.4%, and is squeezed into catalytic electrolysis device by water supply pump, and catalytic electrolysis device anode material is nanometer
Catalytically inactive electrode, substrate are titanium plate, and the precious metal oxide coating that top layer coating crystal grain is 20nm, cathode material is graphite,
Anode and cathode are planar electrode, and the operating voltage of two neighboring pole plate is 12 V, and current density is 160 mA/cm2, waste water
Residence time in catalytic electrolysis device is 45min.Water outlet enters clarifying basin progress flocculation sediment after electrolysis, adds flocculant
For aluminium polychloride, flocculant dosage 30ppm, clarifying basin structure type uses mechanical accelerating purifying pool.Then via stone
The impurity such as fine suspension, microorganism in the cartridge filter removal waste water that sand, granular activated carbon, sintering activity charcoal form
To protect membrane module, filter core uses fusion-jet type fabric filter element, is separated after being pressurized finally by booster pump into film separation system
Except impurity, the film separation system membrane separation assemblies such as remaining bacterium, colloid and dissolubility electrolyte use reverse osmosis hollow fibre
Film is tieed up, operating temperature is 30 DEG C, operating pressure 6MPa.Purified water is finally obtained, concentrate refluxing portion enters catalytic electrolysis
Device, sodium chloride electrolysis matter therein are realized and recycled.
The water quality index of gained purified water is as follows after the processing of above-mentioned acrylic fiber wastewater advanced treatment apparatus：CODcr 21.5
mg/L、NH3-N 4.2 mg/L、BOD52.2 mg/L, pH 7.15, three poisonous and harmful characteristic contamination CN-, acrylonitrile
（AN）, DMF do not detect.In addition, the sodium chloride electrolysis matter rate of recovery is 95.4% in reverse osmosis concentrated liquid.
Embodiment 3.
The water inlet of acrylic fiber wastewater advanced treatment apparatus is the acrylic fiber wastewater after the processing of conventional biochemical treatment technology, its water quality refers to
Mark is as follows：CODcr 84.2 mg/L、NH3-N 16.4 mg/L、BOD5 4.8 mg/L、pH 7.10、CN-0.18 mg/L, third
Alkene nitrile（AN）0.43 mg/L、DMF 5.0 mg/L.
Uniformly mixed with sodium chloride electrolysis matter as shown in Figure 1, device is intake in mixing channel first, make the chlorination in waste water
Sodium mass concentration is maintained at 1.2 %, and is squeezed into catalytic electrolysis device by water supply pump, and catalytic electrolysis device anode material is nanometer
Catalytically inactive electrode, substrate are plastic plate, and the precious metal oxide coating that top layer coating crystal grain is 30 nm, cathode material is iron
Plate, anode and cathode are arc-shaped electrode, and the operating voltage of two neighboring pole plate is 15 V, and current density is 120 mA/cm2,
Residence time of the waste water in catalytic electrolysis device is 60 min.Water outlet enters clarifying basin progress flocculation sediment after electrolysis, is added
Flocculant is polyacrylamide, and flocculant dosage is 15 ppm, and clarifying basin structure type uses plusator.Then via
PP cottons, quartz sand, the cartridge filter of sintering activity charcoal composition remove fine suspension in waste water, the impurity such as microorganism to protect
Cuticula component, filter core use honeycomb filter core, and high frequency diaphragm piece-rate system is entered after being pressurized finally by booster pump (referring to application
Number：201310690242.3 Chinese patent literatures) separate except impurity such as remaining bacterium, colloid and dissolubility electrolyte,
Film separation system membrane separation assemblies use reverse osmosis plate membrane, and operating temperature is 30 DEG C, and operating pressure is 8 MPa.Finally obtain
Purified water, concentrate partial reflux enter catalytic electrolysis system, and sodium chloride electrolysis matter therein is realized and recycled.
The water quality index of gained purified water is as follows after the processing of above-mentioned acrylic fiber wastewater advanced treatment apparatus：CODcr 14.3
mg/L、NH3-N 3.8 mg/L、BOD52.0 mg/L, pH 7.19, three poisonous and harmful characteristic contamination CN-, acrylonitrile
（AN）, DMF do not detect.In addition, the sodium chloride electrolysis matter rate of recovery is 95.6% in reverse osmosis concentrated liquid.
Embodiment 4.
The water inlet of acrylic fiber wastewater advanced treatment apparatus is the acrylic fiber wastewater after the processing of conventional biochemical treatment technology, its water quality refers to
Mark is as follows：CODcr 75.2 mg/L、NH3-N 20.9 mg/L、BOD5 6.4 mg/L、pH 7.06、CN-0.19 mg/L, third
Alkene nitrile（AN）0.33 mg/L、DMF 4.8 mg/L.
Uniformly mixed with sodium sulphate electrolyte as shown in Figure 1, device is intake in mixing channel first, make the sulfuric acid in waste water
Sodium mass concentration is maintained at 0.6%, and is squeezed into catalytic electrolysis device by water supply pump, and catalytic electrolysis device anode material is nanometer
Catalytically inactive electrode, substrate are titanium plate, and the precious metal oxide coating that top layer coating crystal grain is 30 nm, cathode material is iron aluminium
Alloy, anode and cathode are planar electrode, and the operating voltage of two neighboring pole plate is 12 V, and current density is 200 mA/
cm2, residence time of the waste water in catalytic electrolysis device is 30 min.Water outlet enters clarifying basin progress flocculation sediment, institute after electrolysis
It is polyacrylamide to add flocculant, and flocculant dosage is 20 ppm, and clarifying basin structure type uses plusator.Then
The impurity such as the fine suspension in waste water, microorganism are removed via the cartridge filter of PP cottons, granular activated carbon composition to protect
Membrane module, filter core use honeycomb filter core, and high frequency diaphragm piece-rate system is entered after being pressurized finally by booster pump（Referring to application
Number：201310690242.3 Chinese patent literature）Separate except impurity such as remaining bacterium, colloid and dissolubility electrolyte,
Film separation system membrane separation assemblies use nanofiltration plate membrane, and operating temperature is room temperature, and operating pressure is 2 MPa.Finally obtain net
Change water, concentrate partial reflux enters catalytic electrolysis system, and sodium sulphate electrolyte therein is realized and recycled.
The water quality index of gained purified water is as follows after the processing of above-mentioned acrylic fiber wastewater advanced treatment apparatus：CODcr 24.2
mg/L、NH3-N 5.3 mg/L、BOD52.6 mg/L, pH 7.14, three poisonous and harmful characteristic contamination CN-, acrylonitrile
（AN）, DMF do not detect.In addition, the sodium chloride electrolysis matter rate of recovery is 97.4% in reverse osmosis concentrated liquid.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention, for the skill of this area
For art personnel, the invention may be variously modified and varied.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.
Claims (4)
1. a kind of acrylic fiber wastewater deep treatment method, it is characterised in that in turn include the following steps：First in mixing channel by acrylic fibers
Waste water is uniformly mixed with sodium chloride electrolysis matter, the sodium chloride mass concentration in acrylic fiber wastewater is maintained at 0.6%, and pass through water supply
Pump is squeezed into catalytic electrolysis device；Acrylic fiber wastewater water quality index is as follows：CODcr 71.9mg/L、NH3-N22.5mg/L、
BOD56.3mg/L、pH6.98、CN-0.17 mg/L, acrylonitrile 0.30mg/L, DMF5.0 mg/L；Catalytic electrolysis device anode material
For nano-catalytic inert electrode, substrate is titanium plate, and top layer coats the precious metal oxide coating that crystal grain is 20nm, and cathode material is
Aluminium sheet, anode and cathode are planar electrode, and the operating voltage of two neighboring pole plate is 9V, current density 120mA/cm 2 ,
Residence time of the acrylic fiber wastewater in catalytic electrolysis device is 30min；Water outlet enters clarifying basin progress flocculation sediment after electrolysis, is thrown
Flocculant is added to be polyacrylamide, flocculant dosage 20ppm, clarifying basin structure type uses mechanical accelerating purifying pool；So
The fine suspension in waste water, microbial impurities are removed by the cartridge filter that is made of PP cottons, granular activated carbon to protect
Membrane module, filter core are separated except residual using sintering chimney filter after being pressurized finally by booster pump into high frequency diaphragm piece-rate system
Remaining bacterium, colloid and dissolubility electrolyte impurity, film separation system membrane separation assemblies use reverse osmosis plate membrane, work temperature
Spend for room temperature, operating pressure 6MPa；Finally obtain purified water；Purified water water quality index is as follows：CODcr15.7mg/L、NH 3-
N4.3 mg/L、BOD51.9mg/L, pH7.16, three pollutant CN-, acrylonitrile, DMF do not detect；In reverse osmosis concentrated liquid
The sodium chloride electrolysis matter rate of recovery is 96.1%；Concentrate partial reflux enters catalytic electrolysis device, and sodium chloride electrolysis matter therein is realized
Recycle.
2. a kind of acrylic fiber wastewater deep treatment method, it is characterised in that in turn include the following steps：First in mixing channel by acrylic fibers
Waste water is uniformly mixed with sodium chloride electrolysis matter, the sodium chloride mass concentration in waste water is maintained at 0.4%, and will by water supply pump
It squeezes into catalytic electrolysis device；Acrylic fiber wastewater water quality index is as follows：CODcr 69.4 mg/L、NH 3-N 23.8 mg/L、BOD5
8.4 mg/L、pH7.02、CN-0.22 mg/L, acrylonitrile 0.29mg/L, DMF5.2 mg/L；Catalytic electrolysis device anode material is
Nano-catalytic inert electrode, substrate are titanium plate, and top layer coats the precious metal oxide coating that crystal grain is 20nm, and cathode material is
Graphite, anode and cathode are planar electrode, and the operating voltage of two neighboring pole plate is 12V, current density 160mA/cm2 ,
Residence time of the waste water in catalytic electrolysis device is 45min；Water outlet enters clarifying basin progress flocculation sediment after electrolysis, adds wadding
Solidifying agent is aluminium polychloride, flocculant dosage 30ppm, and clarifying basin structure type uses mechanical accelerating purifying pool；Then pass through
Fine suspension, microorganism in the cartridge filter removal waste water be made of quartz sand, granular activated carbon, sintering activity charcoal is miscellaneous
For matter to protect membrane module, filter core uses fusion-jet type fabric filter element, and film separation system is entered after being pressurized finally by booster pump and is separated
Remaining bacterium, colloid and dissolubility electrolyte impurity are removed, film separation system membrane separation assemblies use reverse osmosis hollow fibre
Film is tieed up, operating temperature is 30 DEG C, operating pressure 6MPa；Finally obtain purified water；Purified water water quality index is as follows：
CODcr21.5mg/L、NH 3 -N4.2 mg/L、BOD52.2 mg/L, pH7.15, three pollutant CN-, acrylonitrile, DMF it is equal
Do not detect；The sodium chloride electrolysis matter rate of recovery is 95.4% in reverse osmosis concentrated liquid；Concentrate refluxing portion enters catalytic electrolysis device,
Sodium chloride electrolysis matter therein is realized and recycled.
3. a kind of acrylic fiber wastewater deep treatment method, it is characterised in that in turn include the following steps：First in mixing channel by acrylic fibers
Waste water is uniformly mixed with sodium chloride electrolysis matter, the sodium chloride mass concentration in waste water is maintained at 1.2 %, and pass through water supply pump
Squeezed into catalytic electrolysis device；Acrylic fiber wastewater water quality index is as follows：CODcr 84.2mg/L、NH 3 -N 16.4mg/L、
BOD54.8mg/L、pH7.10、CN-0.18 mg/L, acrylonitrile 0.43mg/L, DMF5.0mg/L；Catalytic electrolysis device anode material
For nano-catalytic inert electrode, substrate is plastic plate, and top layer coats the precious metal oxide coating that crystal grain is 30 nm, cathode
Material is iron plate, and anode and cathode are arc-shaped electrode, and the operating voltage of two neighboring pole plate is 15V, current density 120
mA/cm 2 , residence time of the waste water in catalytic electrolysis device is 60min；Water outlet enters clarifying basin progress flocculation sediment after electrolysis,
Added flocculant is polyacrylamide, flocculant dosage 15ppm, and clarifying basin structure type uses plusator；So
By the fine suspension in the cartridge filter removal waste water being made of PP cottons, quartz sand, sintering activity charcoal, microbial impurities
To protect membrane module, filter core uses honeycomb filter core, and high frequency diaphragm piece-rate system is entered after being pressurized finally by booster pump and is separated
Remaining bacterium, colloid and dissolubility electrolyte impurity are removed, film separation system membrane separation assemblies use reverse osmosis plate membrane,
Operating temperature is 30 DEG C, operating pressure 8MPa；Finally obtain purified water；Purified water water quality index is as follows：CODcr
14.3mg/L、NH 3-N 3.8 mg/L、BOD52.0mg/L, pH7.19, three pollutant CN-, acrylonitrile, DMF do not examine
Go out；The sodium chloride electrolysis matter rate of recovery is 95.6% in reverse osmosis concentrated liquid；Concentrate partial reflux enters catalytic electrolysis system, its
In sodium chloride electrolysis matter realize recycle.
4. a kind of acrylic fiber wastewater deep treatment method, it is characterised in that in turn include the following steps：First in mixing channel by acrylic fibers
Waste water is uniformly mixed with sodium sulphate electrolyte, the sodium sulfate quality concentration in waste water is maintained at 0.6%, and will by water supply pump
It squeezes into catalytic electrolysis device；Acrylic fiber wastewater water quality index is as follows：CODcr 75.2 mg/L、NH 3 -N 20.9 mg/L、
BOD56.4 mg/L、pH7.06、CN-0.19 mg/L, the mg/L of acrylonitrile 0.33, DMF4.8 mg/L；Catalytic electrolysis device anode material
Expect that for nano-catalytic inert electrode, substrate be titanium plate, top layer coats the precious metal oxide coating that crystal grain is 30nm, cathode material
Expect that for ferroaluminium, anode and cathode are planar electrode, and the operating voltage of two neighboring pole plate is 12V, and current density is
200mA/cm 2 , residence time of the waste water in catalytic electrolysis device is 30min；Water outlet into clarifying basin flocculate heavy after electrolysis
Form sediment, it is polyacrylamide to add flocculant, flocculant dosage 20ppm, and clarifying basin structure type uses plusator；
Then the cartridge filter formed via PP cottons, granular activated carbon removes fine suspension in waste water, microbial impurities to protect
Cuticula component, filter core use honeycomb filter core, separate and remove into high frequency diaphragm piece-rate system after being pressurized finally by booster pump
Remaining bacterium, colloid and dissolubility electrolyte impurity, film separation system membrane separation assemblies use nanofiltration plate membrane, work temperature
It is 2 MPa to spend for room temperature, operating pressure；Finally obtain purified water；The water quality index of purified water is as follows：CODcr 24.2mg/L、
NH 3 -N5.3mg/L、BOD52.6 mg/L, pH 7.14, three poisonous and harmful characteristic contamination CN-, acrylonitrile, DMF it is equal
Do not detect；The sodium chloride electrolysis matter rate of recovery is 97.4% in reverse osmosis concentrated liquid；Concentrate partial reflux enters catalytic electrolysis system
System, sodium sulphate electrolyte therein are realized and recycled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510656020.9A CN105174565B (en) | 2015-10-13 | 2015-10-13 | Acrylic fiber wastewater deep treatment method |
Applications Claiming Priority (1)
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| JPS58137492A (en) * | 1982-02-10 | 1983-08-15 | Suido Kiko Kk | Method for removing color of water |
| CN201923914U (en) * | 2010-12-30 | 2011-08-10 | 波鹰(厦门)科技有限公司 | Printing and dyeing wastewater recycling device based on electrolysis and laminating technologies |
| CN104261624A (en) * | 2014-09-29 | 2015-01-07 | 长春黄金研究院 | Method for treating cyanide-containing wastewater in gold cyaniding enterprises |
| CN104326532A (en) * | 2014-10-10 | 2015-02-04 | 陕西华陆化工环保有限公司 | Method for treatment of industrial wastewater by electrolytic process |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58137492A (en) * | 1982-02-10 | 1983-08-15 | Suido Kiko Kk | Method for removing color of water |
| CN201923914U (en) * | 2010-12-30 | 2011-08-10 | 波鹰(厦门)科技有限公司 | Printing and dyeing wastewater recycling device based on electrolysis and laminating technologies |
| CN104261624A (en) * | 2014-09-29 | 2015-01-07 | 长春黄金研究院 | Method for treating cyanide-containing wastewater in gold cyaniding enterprises |
| CN104326532A (en) * | 2014-10-10 | 2015-02-04 | 陕西华陆化工环保有限公司 | Method for treatment of industrial wastewater by electrolytic process |
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