CN110194559A - A kind of process of colour-spun yarns dyeing waste-water zero-emission and resource reusing - Google Patents
A kind of process of colour-spun yarns dyeing waste-water zero-emission and resource reusing Download PDFInfo
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- CN110194559A CN110194559A CN201811061185.1A CN201811061185A CN110194559A CN 110194559 A CN110194559 A CN 110194559A CN 201811061185 A CN201811061185 A CN 201811061185A CN 110194559 A CN110194559 A CN 110194559A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/30—Nature of the water, waste water, sewage or sludge to be treated from the textile industry
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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Abstract
The present invention relates to a kind of colour-spun yarns dyeing waste-water zero-emission and the processes of resource reusing comprising following steps: (1) carrying out biochemical treatment to colour-spun yarns dyeing waste-water；(2) waste water after biochemical treatment is subjected to ultrafiltration and reverse osmosis treatment；(3) reverse osmosis concentrated water enters nanofiltration separation system, first decolourize, concentrated water is through evaporative crystallization as dangerous waste processing after decoloration, clear water is purified again after decoloration, concentrated water dyeing will to be used for after decoloration and softening after purification, clear water and osmosis filtration clear water, which merge, after purification is used for full section production technology.The concentrated obtained strong brine of concentrated water is dyed for dyeing section after purification in the present invention, saves the additive amount of anhydrous sodium sulphate；Meanwhile the printing-dying wastewater recycling rate in the present invention is up to 95%, and 80% or more inorganic salts can be used for dyeing in recycling waste water；Since evaporation capacity reduces 95%, ton water process totle drilling cost is greatly reduced, thus has good economic benefit and social benefit.
Description
Technical field
The present invention relates to treatment of dyeing wastewater field more particularly to a kind of colour-spun yarns dyeing waste-water zero-emission and resource reusings
Process.
Background technique
So-called colour-spun yarns are exactly that fiber is first dyed colored fibre, then by the fibre of two or more different colours
Dimension after fully mixed, is spun into the yarn with unique color blending effect.Spinning process after the first dye of colour-spun yarns, than tradition
50% or more technique water-saving and emission-reducing, meets low-carbon environment-friendly requirement.In entire textile industry, the accounting of traditional handicraft is 65% left
The right side, dyed yarn 20% or so, colour-spun yarns 15% or so, therefore the growing space of colour-spun yarns is very big.It pulls now or by circulation
Production, if following realize consumptive stimulation production, the prospect of colour-spun yarns is with regard to inestimable.
Colour-spun yarns master dyestuff to be used is that reactive dye need to add to increase dye uptake in dyeing course at this stage
Add about 6% anhydrous sodium sulphate (sodium sulphate) to be used as solubilizer, improves dye uptake.Therefore in colour-spun yarns dyeing waste-water TDS salinity
Main component is sodium sulphate.Salinity cannot remove in biochemical treatment, can be discharged into environment, make with waste water after wastewater biochemical processing
At the serious pollution of environment.
Every dye 1t cotton staple in bulk or yarn, need to generate the dyeing waste-water of 80t or so.Due to the improvement of dyeing, do not have
The waste water of the difficult biochemical treatments such as desized wastewater, alkali decrement waste water, vulcanization waste water, in addition it mainly uses reactive dye, therefore its
The biochemical treatment difficulty of waste water is smaller, and water outlet COD content can be handled to 100mg/l or less；Waste water TDS content about 0.8%-1%,
And its main component is by the sodium sulphate that is added in dyeing course.Processing mode basic at this stage is that waste water passes through biochemical treatment
Afterwards, waste water uses reverse osmosis membrane recycling 50%, another 50% discharge of wastewater.
In 50% waste water of discharge, the sodium sulphate containing 1.6%-2% is not only made by this discharge of wastewater into environment
At the pollution of environment, the waste of water resource and sodium sulphate is also resulted in.Therefore processing recycling wherein water is carried out to this waste water again
Resource and sodium sulphate resource have good economic benefit and social benefit.
If carrying out technique of zero discharge processing to the waste water, traditional process route is that again pass by DTRO contour for RO concentrate
Pressure reverse osmosis process continues to be concentrated into TDS10% or so.DTRO concentrate using the thermal concentrations such as multiple-effect evaporation or MVR technique into
Row processing, the solid content evaporated become dangerous waste otherwise processed.This technology investment is at high cost, and is carried out with a large amount of thermal energy
Evaporation, process operation is at high cost, 1 ton of waste water of every processing, can generate about 10kg dangerous waste, the electric energy of consumption about 17~30KWh and
The loss of medicament.
CN206244574U discloses a kind of Zero discharging system of dyeing waste water with high salt, and the system, which uses, divides salt selective
Electric drive film carries out the separation of sulfate ion and chloride ion in various concentration to waste water；The method is only to the part in salting liquid
Anion carries out concentration, narrow application range.
CN104086043A discloses a kind of processing method of dyeing waste water, using biochemistry+ultrafiltration+ion-exchange technique,
The method is the problem is that ultrafiltration membrane is easy to appear the difficult cleaning of problem of pollution and regenerated liquid occurs in ion-exchange resins regeneration
Pollution problem.And reuse is carried out only for water resource, reuse is not carried out to other mineral resources in waste water.
CN101293726A discloses a kind of dyeing waste water and using biochemistry+ultrafiltration+reverse osmosis treatment and sub-prime uses
Technique.The core of its technique first is that ultrafiltration+reverse osmosis treatment, the shortcomings that technique be can not solve ultrafiltration membrane pollution and its
Service life problem.According to engineering experience, cleaning flux can not restore problem after ultrafiltration membrane will appear pollution.And not to waste water
Minerals resource carries out reuse, and the water rate of recovery is low.
CN207468344U discloses a kind of wastewater treatment equipment, and described device includes waste water preliminary sedimentation tank, buffering pond, mentions
It rises pump, neutralize case, reaction chamber, flocculation tanks, concentrating clarifying pond, water tank sludge surge tank and dewaterer.The specific aim of this device
It is not strong, it is insufficient for the processing capacity of dyeing and printing sewage.
Although above-mentioned document provides certain help for the processing of dyeing waste, still remain not to waste water
Minerals resource carries out reuse, the problems such as water rate of recovery is low, therefore develops a kind of colour-spun yarns dyeing waste-water zero-emission and resource is returned
It is of great significance with technique.
Summary of the invention
In view of technical problem of the existing technology, the purpose of the present invention is to provide a kind of colour-spun yarns dyeing waste-water zero-emissions
It puts and the process of resource reusing, the method includes the processing of biochemical treatment, reverse osmosis treatment and nanofiltration separation；So that water returns
Yield > 95%, the sodium sulphate rate of recovery > 80%, also, reuse water energy are for processes such as kiering, cleaning, dyeing；And extract waste water
In the inorganic salts such as sodium sulphate be back to dyeing, save water resource and mineral resources.
For this purpose, the present invention adopts the following technical scheme:
The present invention provides a kind of colour-spun yarns dyeing waste-water zero-emission and the process of resource reusing, the method includes
Following steps:
(1) biochemical treatment is carried out to colour-spun yarns dyeing waste-water；
(2) waste water after biochemical treatment is subjected to ultrafiltration and reverse osmosis treatment；
(3) reverse osmosis concentrated water enters nanofiltration separation system, first decolourizes, and concentrated water obtains residual through evaporative crystallization after decoloration
Slag is as dangerous waste processing；Clear water is purified again after decoloration, gained concentrated water will be used for dyer after decoloration and softening after purification
For skill to substitute anhydrous sodium sulphate, clear water and osmosis filtration clear water, which merge, after purification is used for full section production technology.
After the present invention passes through biochemical treatment+ultrafiltration+reverse osmosis treatment, reverse osmosis concentrated water is subjected to nanofiltration separation processing, is taken off
Concentrated water after color can assemble total inorganic salinity of 60~85% total organic matter in colour-spun yarns dyeing waste-water and 7~15%；It will
The residue that concentrated water obtains after evaporative crystallization after the decoloration can be handled directly as dangerous waste, be realized to the big of colour-spun yarns waste water
Part is handled；Simultaneously as gained concentrated water salt content is used directly in dyeing up to 5~15% to replace after purified
For anhydrous sodium sulphate, to save the additive amount of anhydrous sodium sulphate, reduce anhydrous sodium sulphate outlet into environment.
Process provided by the invention so that printing-dying wastewater recycling rate is up to 95% or more, daily only supplement production and
The water lost in evaporation process；In addition the inorganic salts that in waste water 80% or more can be recycled can also be used in dyeing, for enterprise
Industry saves the discharge bought a large amount of inorganic salts expense and reduce inorganic salts, to generate good economic benefit.
Preferably, step (1) described biochemical treatment includes anaerobic acidification hydrolysis and aerobic treatment.
Preferably, the processing time of anaerobic acidification hydrolysis be 12~for 24 hours, such as 12h, 13h, 14h, 15h, 16h,
17h、18h、19h、20h、21h、22h、23h、24h。
Preferably, the time of the aerobic treatment be 24~36h, such as 24 hours, 26h, 28h, 30h, 32h, 33.5h,
34h、36h。
Preferably, step (1) the colour-spun yarns dyeing waste-water is introduced into anaerobic acidification hydrolytic tank, and anaerobism stops 12~for 24 hours,
Acidizing hydrolyzation tank water outlet enters aerobe pond, and aerobic tank stops 24~36h.
Preferably, the aerobic tank is discharged COD < 200mg/L, turbidity < 10NTU.
Preferably, the operating pressure of step (2) described reverse osmosis treatment be 2.0~4.0MPa, such as 2.0MPa,
2.1MPa、2.2MPa、2.5MPa、3.0MPa、3.2MPa、3.5MPa、4.0MPa。
Preferably, the supercharging mode of reverse osmosis treatment pressurized design between two sections or three sections of sections.
Preferably, the molecular cut off for the ultrafiltration membrane elements that the ultrafiltration and reverse osmosis treatment process use for 5000~
300000D, such as 5000D, 8000D, 10000D, 200000D, 300000D.
Ultrafiltration system in the present invention is preferably filtered using built-in MBR film or external pillar hollow-fibre membrane, tool
There is superior filter effect.
Preferably, the pressure of step (3) described decolorization be 1.0~3.0MPa, such as 1.0MPa, 1.1MPa,
1.2MPa、1.5MPa、2.0MPa、2.2MPa、2.5MPa、3.0MPa。
Preferably, the decolorization is carried out using decoloration nanofiltration membrane.
Preferably, the molecular cut off of membrane component that the decoloration nanofiltration membrane uses for 200~1000D, such as 200D,
300D、500D、800D、1000D。
Preferably, the operating temperature of the membrane component is 10~80 DEG C, such as 10 DEG C, 15 DEG C, 20 DEG C, 25 DEG C, 30 DEG C, 40
℃、50℃、60℃、70℃、80℃。
Preferably, the decoloration nanofiltration membrane uses rolling or tubular nanofiltration membrane.
Preferably, the purifying of clear water is carried out using purifying nanofiltration membrane after step (3) described decoloration.
Preferably, the molecular cut off of membrane component that the purifying nanofiltration membrane uses for 100~800D, such as 100D,
200D、300D、500D、800D。
Preferably, the operating temperature of the membrane component is 10~80 DEG C.
Preferably, the discoloration method of concentrated water obtained by the purifying is that powder activity carbon decoloring or ozone oxidation are decolourized.
Preferably, the Powdered Activated Carbon additive amount that the powder activity carbon decoloring uses for 0.1~0.5%, such as
0.1%, 0.15%, 0.2%, 0.3%, 0.4%, 0.5%.
In the present invention, the water rate of recovery after step (2) described reverse osmosis treatment is 65~85%；Through described in step (3)
The water rate of recovery after decolorization is 85~96%.
In the present invention, concentrated water assembles in colour-spun yarns dyeing waste-water 60~85% organic matter and 7~15% after the decoloration
Inorganic salinity；Residue of the concentrated water after evaporative crystallization directly can be used as dangerous waste processing after decoloration.
As currently preferred technical solution, the work of colour-spun yarns dyeing waste-water zero-emission of the present invention and resource reusing
Process, specifically includes the following steps:
(1) biochemical treatment: the hydrolysis of 12~anaerobic acidification for 24 hours is carried out to colour-spun yarns dyeing waste-water and then carries out 24~36h
Aerobic treatment, COD < 200mg/L in treated water, turbidity < 10NTU；
(2) ultrafiltration and reverse osmosis treatment: the waste water after biochemical treatment is subjected to ultrafiltration and reverse osmosis treatment, reverse osmosis penetrates
Filtering water is back to production；For the molecular cut off for the membrane component that process of ultrafiltration treatment uses for 5000~300000D, ultrafiltration produces water
Into reverse osmosis treatment；The pressure of the reverse osmosis treatment is 2.0~4.0MPa；The supercharging mode of the reverse osmosis treatment uses
Pressurized design between two sections or three sections of sections；The water rate of recovery of the reverse osmosis treatment is 65~85%；
(3) nanofiltration separation is handled: reverse osmosis concentrated water enters nanofiltration filtration system, is first carried out at decoloration using decoloration nanofiltration membrane
Reason；The clear water of gained decoloration nanofiltration membrane further uses purifying nanofiltration membrane and carries out purification process, by concentrated water obtained by purification membrane
Decoloration and sofening treatment are carried out, is used as the substitution anhydrous sodium sulphate dyeing of dyeing section；The pressure of the decolorization be 1.0~
3.0MPa；The production water yield of the decolorization process is 85~96%；The resulting nanofiltration concentrated water of decolorization assembles color
60~85% organic matter and 7~15% inorganic salinity in spinning dyeing waste-water；The nanofiltration concentrated water is evaporated crystallization, steams
Residue is sent out as dangerous waste processing；Salt amount in concentrated water after the purification process is 5~15%；The decolorization process uses
Membrane component molecular cut off be 200~1000D；The molecular cut off for the membrane component that the purification process process uses for
100~800D；The decoloration nanofiltration membrane and the operating temperature of purification membrane are 10 DEG C~80 DEG C；The decoloration nanofiltration membrane includes rolling
Or tubular nanofiltration membrane；The method of the decoloration is powder activity carbon decoloring；Powder activity used in the powder activity carbon decoloring
The additive amount of charcoal is 0.1~0.5%.
Compared with prior art, the present invention at least has the advantages that
(1) the water rate of recovery > 95% of the method for the invention, sodium sulphate recycling > 80%；
(2) technical process of the method for the invention is simple, is easy to industrial applications；
(3) the reuse water energy of the method for the invention is for processes such as kiering, cleaning, dyeing；And it extracts in waste water
The inorganic salts such as sodium sulphate are back to dyeing, save water resource and mineral resources, realize green production.
Specific embodiment
Of the invention for ease of understanding, it is as follows that the present invention enumerates embodiment.Those skilled in the art are it will be clearly understood that the implementation
Example is only to aid in the understanding present invention, should not be regarded as a specific limitation of the invention.
Embodiment 1
The 1.1 daily 1000t of colour-spun yarns dyeing waste-water, through toning pH cooling, homogeneous, coagulating sedimentation, hydrolysis acidification, aerobic place
Reason, two techniques, the bio-chemical effluent indexs such as heavy are as follows:
1.1 bio-chemical effluent water quality of table
| Pollutant | COD | NH3-N | BOD5 | Conductivity | Coloration | TDS | Water |
| Content | 110mg/l | 0.5mg/l | 5mg/l | 11.8ms/cm | 70 | 0.8% | 1000t/d |
1.2 bio-chemical effluents enter ultrafiltration (UF) system after high dense settling pond pre-processes, wherein in the use of UF system
Formula MBR film or the filtering of external pillar hollow-fibre membrane, filter pressure 0.2MPa are set, water yield 90% is produced, 10% concentrated water returns two
Continue ultrafiltration after heavy pond processing.UF water yield is 1000t/d, and effluent quality index is as follows:
1.2 ultra-filtration water water quality of table
| Pollutant | COD | NH3-N | BOD5 | Conductivity | Coloration | TDS | Water |
| Content | 90mg/l | 0.5mg/l | 4.5mg/l | 12.4ms/cm | 65 | 0.8% | 1000t/d |
Reverse osmosis concentration is passed through in 1.3UF water outlet
UF produces water and uses reverse osmosis (RO) system, and operating pressure 2.8MPa produces water yield 73%.Reverse osmosis produced water 730t/
D, reverse osmosis concentrated water 270t/d.730t/d reverse osmosis produced water conductivity 450us/cm, COD < 20mg/l, the full work of this reverse osmosis produced water
Skill process uses.The reverse osmosis concentrated water water quality indicator of 270t/d is as follows:
1.3 reverse osmosis concentrated water effluent quality of table
| Pollutant | COD | NH3-N | BOD5 | TDS | Coloration | PH | Water |
| Content | 280mg/l | 1.1mg/l | 14mg/l | 3% | 240 | 7.6 | 270t/d |
270t/d reverse osmosis concentrated water is entered decoloration film to be further processed.
1.4 reverse osmosis concentrated waters remove COD using decoloration film decoloration
270t/d reverse osmosis concentrated water is decolourized using nanofiltration membrane decoloration system and removes COD, and decoloration film produces water yield 90%, color
Degree is reduced to 8 times by 240 times, and COD is reduced to 55mg/l, salt content 2.7% by the 280mg/l of raw water；Decolourize film concentrated water COD
Rise to 2300mg/l, salt content 5.7%.Decolourize membranous system production water 243t/d, and it is further pure that production water enters purifying membranous system
Change；Decolourize film concentrated water 27t/d, and concentrated water is evaporated using triple effect evaporation equipment, and evaporation residue is dangerous waste, send to dangerous waste and handles factory and office
Reason.
1.5 decoloration films production water enter purification membrane and purify and be used to dye
243t/d decoloration film produces water and enters purifying membranous system processing, and purifying membranous system produces water 163t/d, produces water conductivity
6500us/cm, COD32mg/l, produce water and leading portion RO produces hydration and is back to production dyeing full section process flow together and uses.It is pure
Change membranous system and produce concentrated water 80t/t, salt content 8% is used for dyeing, is contaminated using this water after active carbon decoloring and softening
When color, addition dyeing auxiliaries anhydrous sodium sulphate (sodium sulphate) can not had to, reduce the dosage of anhydrous sodium sulphate in dyeing and reduced first bright
Discharge of the powder to environment.
Whole process, reusing rate 97.3%, salt reclamation rate are 80%, and ton cost of water treatment is 8.5 yuan/t, is achieved
Good economic benefit and social benefit.
Embodiment 2
The 2.1 daily 500t of colour-spun yarns dyeing waste-water, through toning pH cooling, homogeneous, coagulating sedimentation, hydrolysis acidification, aerobic place
Reason, two techniques, the bio-chemical effluent indexs such as heavy are as follows:
2.1 bio-chemical effluent water quality of table
| Pollutant | COD | NH3-N | BOD5 | Conductivity | Coloration | TDS | Water |
| Content | 100mg/l | 0.8mg/l | 5mg/l | 15.8ms/cm | 70 | 1% | 500t/d |
2.2 bio-chemical effluents enter ultrafiltration (UF) system after high dense settling pond pre-processes, wherein in the use of UF system
Formula MBR film or the filtering of external pillar hollow-fibre membrane, filter pressure 0.2MPa are set, water yield 90% is produced, 10% concentrated water returns two
Continue ultrafiltration after heavy pond processing.UF water yield is 500t/d, water quality of being born are as follows:
2.2 ultra-filtration water water quality of table
| Pollutant | COD | NH3-N | BOD5 | Conductivity | Coloration | TDS | Water |
| Content | 80mg/l | 0.5mg/l | 4.5mg/l | 15.8ms/cm | 65 | 1% | 500t/d |
Reverse osmosis concentration is passed through in 2.3UF water outlet
UF produces water and uses reverse osmosis (RO) system, and operating pressure 3.5MPa produces water yield 65%.Reverse osmosis produced water 325t/
D, reverse osmosis concentrated water 175t/d.325t/d reverse osmosis produced water conductivity 650us/cm, COD < 20mg/l, the full work of this reverse osmosis produced water
Skill process uses.The reverse osmosis concentrated water water quality indicator of 175t/d is as follows:
2.3 reverse osmosis concentrated water effluent quality of table
| Pollutant | COD | NH3-N | BOD5 | TDS | Coloration | PH | Water |
| Content | 191mg/l | 1.1mg/l | 14mg/l | 2.8% | 180 | 7.6 | 175t/d |
175t/d reverse osmosis concentrated water enters decoloration film and is further processed.
2.4 reverse osmosis concentrated waters remove COD using decoloration film decoloration
175t/d reverse osmosis concentrated water is decolourized using nanofiltration membrane decoloration system and removes COD, and decoloration film produces water yield 95%, produces
For colority of water by being reduced to 12 times into 180 times of system water, COD is reduced to 40mg/l, salt content 2.6%, decoloration by 191mg/l
Membranous system water yield is 166.25t/d, and production water enters purifying membranous system and is further purified；Decoloration film concentrated water COD rises to
3060mg/l, salt content 6.6%.Decolourize film concentrated water 8.75t/d, and concentrated water is evaporated using triple effect evaporation equipment, and evaporation residue is
Dangerous waste is sent to dangerous waste treatment plant and is handled.
2.5 decoloration films production water enter purification membrane and purify and be used to dye
166.25t/d decoloration film produces water and enters purifying membranous system processing, and purifying membranous system produces water 96.25t/d, produces water power and leads
Rate 4500us/cm, COD30mg/l, produce water and leading portion RO produces hydration and is back to production dyeing full section process flow together and uses.
It purifies membranous system and produces concentrated water 70t/t, salt content 6.1% is used for dyeing, uses this after active carbon decoloring and softening
When water dyes, addition dyeing auxiliaries anhydrous sodium sulphate (sodium sulphate) can not had to, reduce the dosage and reduction of anhydrous sodium sulphate in dyeing
Discharge of the anhydrous sodium sulphate to environment.
Whole process, reusing rate 98.25%, salt reclamation rate are 85.4%, and ton cost of water treatment is 8.8 yuan/t, is taken
Obtained good economic benefit and social benefit.
The Applicant declares that the present invention is explained by the above embodiments detailed process equipment and process flow of the invention,
But the present invention is not limited to the above detailed process equipment and process flow, that is, it is above-mentioned detailed not mean that the present invention must rely on
Process equipment and process flow could be implemented.It should be clear to those skilled in the art, any improvement in the present invention,
Addition, selection of concrete mode of equivalence replacement and auxiliary element to each raw material of product of the present invention etc., all fall within of the invention
Within protection scope and the open scope.
Claims (7)
1. the process of a kind of colour-spun yarns dyeing waste-water zero-emission and resource reusing, which is characterized in that the method includes with
Lower step:
(1) biochemical treatment is carried out to colour-spun yarns dyeing waste-water；
(2) waste water after biochemical treatment is subjected to ultrafiltration and reverse osmosis treatment；
(3) reverse osmosis concentrated water enters nanofiltration separation system, first decolourizes, and the residue that concentrated water is obtained through evaporative crystallization after decoloration is made
For dangerous waste processing；Clear water is purified again after decoloration, will after purification gained concentrated water be used for after decoloration and softening dyeing with
Anhydrous sodium sulphate is substituted, clear water and osmosis filtration clear water, which merge, after purification is used for full section production technology.
2. the method as described in claim 1, which is characterized in that step (1) described biochemical treatment include anaerobic acidification hydrolysis and
Aerobic treatment；
Preferably, the processing time of anaerobic acidification hydrolysis be 12~for 24 hours；
Preferably, the time of the aerobic treatment is 24~36h；
Preferably, step (1) the colour-spun yarns dyeing waste-water is introduced into anaerobic acidification hydrolytic tank, and anaerobism stops 12~for 24 hours, acidification
Hydrolytic tank water outlet enters aerobe pond, and aerobic tank stops 24~36h；
Preferably, the aerobic tank is discharged COD < 200mg/L, turbidity < 10NTU.
3. method according to claim 1 or 2, which is characterized in that the operating pressure of step (2) described reverse osmosis treatment is
2.0~4.0MPa；
Preferably, the supercharging mode of reverse osmosis treatment pressurized design between two sections or three sections of sections；
Preferably, the molecular cut off for the ultrafiltration membrane elements that the ultrafiltration and reverse osmosis treatment process use for for 5000~
300000D。
4. the method as described in one of claim 1-3, which is characterized in that the pressure of step (3) described decolorization be 1.0~
3.0MPa；
Preferably, the decolorization is carried out using decoloration nanofiltration membrane；
Preferably, the molecular cut off for the membrane component that the decoloration nanofiltration membrane uses is 200~1000D；
Preferably, the operating temperature of the membrane component is 10~80 DEG C；
Preferably, the decoloration nanofiltration membrane uses rolling or tubular nanofiltration membrane.
5. the method as described in one of claim 1-4, which is characterized in that the purifying of clear water uses after step (3) described decoloration
Nanofiltration membrane is purified to carry out；
Preferably, the molecular cut off for the membrane component that the purifying nanofiltration membrane uses is 100~800D；
Preferably, the operating temperature of the membrane component is 10~80 DEG C；
Preferably, the salt content of concentrated water obtained by the purifying is 5~15%；
Preferably, the discoloration method of concentrated water obtained by the purifying is that powder activity carbon decoloring or ozone oxidation are decolourized；
Preferably, the Powdered Activated Carbon additive amount that the powder activity carbon decoloring uses is 0.1~0.5%.
6. the method as described in one of claim 1-5, which is characterized in that the water recycling after step (2) described reverse osmosis treatment
Rate is 65~85%；
Preferably, the water rate of recovery after step (3) described decolorization is 85~96%；
Preferably, after the decoloration concentrated water aggregation colour-spun yarns dyeing waste-water in 60~85% organic matter and 7~15% it is inorganic
Salinity.
7. the method as described in one of claim 1-6, which is characterized in that the described method comprises the following steps:
(1) biochemical treatment: carrying out the hydrolysis of 12~anaerobic acidification for 24 hours to colour-spun yarns dyeing waste-water, then to carry out 24~36h aerobic
Biochemical treatment, COD < 200mg/L in treated water, turbidity < 10NTU；
(2) ultrafiltration and reverse osmosis treatment: the waste water after biochemical treatment is subjected to hyperfiltration treatment and reverse osmosis treatment, reverse osmosis penetrates
Filtering water is back to production；For the molecular cut off for the membrane component that process of ultrafiltration treatment uses for 5000~300000D, ultrafiltration produces water
Into reverse osmosis treatment；The pressure of the reverse osmosis treatment is 2.0~4.0MPa；The supercharging mode of the reverse osmosis treatment uses
Pressurized design between two sections or three sections of sections；The water rate of recovery of the reverse osmosis treatment is 65~85%；
(3) nanofiltration separation is handled: reverse osmosis concentrated water enters nanofiltration filtration system, first carries out decolorization using decoloration nanofiltration membrane；
The clear water of gained decoloration nanofiltration membrane further uses purifying nanofiltration membrane and carries out purification process, and concentrated water obtained by purification membrane is carried out
Decoloration and sofening treatment are used as the substitution anhydrous sodium sulphate dyeing of dyeing section；The pressure of the decolorization be 1.0~
3.0MPa；The production water yield of the decolorization process is 85~96%；The resulting nanofiltration concentrated water of decolorization assembles color
60~85% organic matter and 7~15% inorganic salinity in spinning dyeing waste-water；The nanofiltration concentrated water is evaporated crystallization, steams
Residue is sent out as dangerous waste processing；Salt amount in concentrated water after the purification process is 5~15%；The decolorization process uses
Membrane component molecular cut off be 200~1000D；The molecular cut off for the membrane component that the purification process process uses for
100~800D；The decoloration nanofiltration membrane and the operating temperature of purification membrane are 10 DEG C~80 DEG C；The decoloration nanofiltration membrane includes rolling
Or tubular nanofiltration membrane；The method of the decoloration is powder activity carbon decoloring；Powder activity used in the powder activity carbon decoloring
The additive amount of charcoal is 0.1~0.5%.
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