CN106430792A - Yarn-dyed fabric yarn dyeing waste water treatment and online recycling method and device - Google Patents

Yarn-dyed fabric yarn dyeing waste water treatment and online recycling method and device Download PDF

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Publication number
CN106430792A
CN106430792A CN201611040360.XA CN201611040360A CN106430792A CN 106430792 A CN106430792 A CN 106430792A CN 201611040360 A CN201611040360 A CN 201611040360A CN 106430792 A CN106430792 A CN 106430792A
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water
waste water
yarn dyeing
yarn
dyeing waste
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Inventor
石岩
岳金强
段云霞
荆建刚
刘京伟
霍永青
侯霙
孙凯
赵晓丽
许丹宇
赵金国
段晓雨
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TIANJIN UNITED ENVIRONMENTAL PROTECTION ENGINEERING DESIGN Co Ltd
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TIANJIN UNITED ENVIRONMENTAL PROTECTION ENGINEERING DESIGN Co Ltd
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Priority to CN201611040360.XA priority Critical patent/CN106430792A/en
Publication of CN106430792A publication Critical patent/CN106430792A/en
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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
    • 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
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/24—Treatment of water, waste water, or sewage by flotation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—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
    • 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
    • C02F1/722—Oxidation by peroxides
    • 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
    • C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C02F2201/007—Modular design
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124—Water desalination
    • Y02A20/131—Reverse-osmosis

Abstract

The invention discloses a yarn-dyed fabric yarn dyeing waste water treatment and online recycling method and device. The device mainly comprises a self-cleaning filter, an adjusting pond, a heterogeneous Fenton oxidation pond, an air flotation pond, a double membrane system and an MVR system which are connected in sequence. The method comprises the steps that yarn dyeing waste water is independently treated, anhydrous sodium sulfate in the yarn dyeing waste water is subjected to resource recycling, the content of refractory organics and salt in the comprehensive waste water can be effectively reduced, and the utilization rate of raw materials is increased. The experiment result shows that the whole device can recycle 90% or above of the yarn dyeing waste water, the salt in the waste water can be effectively removed, the salt removing rate is larger than 99%, distillate generated by an RO water producing and MVR system can be recycled to be used for various production links, the new water use amount is replaced, the generation amount of pollutants is controlled from the source, and the idea of cleaner production is fully embodied.

Description

A kind of yarn-dyed fabric yarn dyeing wastewater treatment and online recycling method and device
Technical field
The invention belongs to textile printing and dyeing industry wastewater treatment and resource reclaim field are and in particular to a kind of be used for enterprises The efficient process of high saliferous yarn dyeing waste water and the method and device of online recycling anhydrous sodium sulfate.
Background technology
Yarn-dyed fabric produces and includes the operations such as desizing, mercerising, yarn dyeing.Wherein, yarn dyeing waste water results from yarn-dyed fabric production process In yarn dyeing operation, the water yield is larger.Because different fibrous raw materials and product needed use different dyestuffs, auxiliary agent and dyeing side Method, adds that the dye uptake of various dyestuffs is different different with the concentration of dye liquor, makes dyeing waste-water change of water quality very big, wherein contain slurry Material, dyestuff, auxiliary agent, surfactant etc., typically in strong basicity, colourity is very high, and COD is much higher compared with BOD, and biodegradability is relatively Difference, belongs to organic wastewater with difficult degradation thereby.Add Na in yarn dyeing operation simultaneously2SO4And Na2CO3, yarn dyeing waste water assumes the spy of high saliferous Point.
At present, the waste water of yarn-dyed fabric manufacturing enterprise is based on each operation concentration discharge, end treatment.Desizing in desizing operation Waste water contains substantial amounts of polyvinyl alcohol（PVA）, in mercerizing process, spent lye contains substantial amounts of sodium hydroxide, yarn dyeing in yarn dyeing operation Waste water contains substantial amounts of Na2SO4、Na2CO3And hardly degraded organic substance, lead to that comprehensive wastewater water removal is big, beyond colourity depth, difficult fall Solution Organic substance and salinity are also very high, focus on that difficulty is larger, and conventional two stage treatment technique cannot effectively remove in waste water Hardly degraded organic substance and salinity, high salinity also can produce harmful effect to biochemical treatment system, or even make system crash. Single treatment technology or simple integrated technology are unable to reach discharge standard, and complicated handling process is faced with floor space again Greatly, capital construction and the high problem of operating cost, the textile printing and dyeing enterprises of middle and small scale are at all powerless to be undertaken.Meanwhile, in waste water some Callable resource is not utilized effectively, and causes enterprise product cost to increase, economic benefit declines, thus affect enterprise controlling The enthusiasm of reason pollution and initiative.
Content of the invention
Present invention aims to yarn-dyed fabric production wastewater treatment difficulty is big, be difficult to qualified discharge, processing cost is high Etc. a series of difficult problems, propose a kind of yarn-dyed fabric yarn dyeing waste water high-efficiency and process and online recycling method and device, by yarn dyeing waste water list Stay alone reason, and resource reclaims anhydrous sodium sulfate therein, can effectively reduce hardly degraded organic substance and salinity in comprehensive wastewater Content, and improve the utilization rate of raw material, the yield of pollutant is controlled from source, has fully demonstrated clean manufacturing Theory.
For achieving the above object, the invention discloses following technical scheme：
A kind of yarn-dyed fabric yarn dyeing wastewater treatment is with online recycling method it is characterised in that carrying out by the steps：
（1）Self-cleaning filter filters to the cloth hair in yarn dyeing waste water, particulate matter, flco, reduces turbidity, purifies water；
（2）Regulating reservoir carries out homogeneity to the water quality of yarn dyeing waste water and the water yield, according to Na in yarn dyeing waste water2CO3Content determine Add the amount of sulphuric acid, make Na in waste water2CO3It is completely transformed into Na2SO4And continuously add sulfur acid for adjusting pH value to being suitable to Fenton The pH value range 5 ~ 6 of reaction；
（3）Filling ternary carried-type active Pd/carbon catalyst CuO-MnO in heterogeneous Fenton oxidation pond2- ZnO/AC, total obturator Accumulated amount is the 1/3 ~ 1/2 of heterogeneous Fenton oxidation pond dischargeable capacity, adds 30% in heterogeneous Fenton oxidation pond simultaneously （w/w）Hydrogen peroxide, dosage is 0.1-0.5kg/ ton water；
Described ternary carried-type active Pd/carbon catalyst CuO-MnO2- ZnO/AC refers to：Using commercially available column-shaped active carbon, use 5 % （w/w）Soak with hydrochloric acid 24 h, 5 %（w/w）NaOH solution soak 24 h, be washed to neutrality, in 120 DEG C dry activation Afterwards as carrier；Cu load capacity is 1% ~ 5%（w/w）, Mn load capacity is 1% ~ 5%（w/w）, Zn load capacity is 0.1% ~ 1%（w/w）；
（4）Add sodium hydroxide that pH value of waste water is adjusted to 7 ~ 8 in flotation tank, the flco in eliminating water and suspension are gone by air supporting effect Granule it is ensured that water outlet clear, after the scum silica frost that air supporting produces is dehydrated through filter press, transport outward by one-tenth mud cake；
（5）CMF, as the pretreating process of RO, removes particle, colloid, larger molecular organicses it is ensured that the SDI value of water outlet is little In 3, reach the inflow requirement of RO；
（6）RO system adopts sea water film, realizes the concentration to yarn dyeing waste water, reduces influent load, single film for follow-up MVR technique Salt rejection rate is more than 99.5%；
（7）MVR evaporation and concentration unit includes：Solidifying water- to-water heat exchanger, MVR vaporizer, centrifuge and exsiccator, control water inlet pH value For 7 ~ 8, SS<10mg/L, MVR vapo(u)rization system salt separation temperature control at 60 ~ 70 DEG C, by Na in RO concentrated water2SO4Purify, concentrate, Crystallize, be dried, be converted into solid forms anhydrous sodium sulfate.
The present invention further discloses the device of yarn-dyed fabric yarn dyeing wastewater treatment and online recycling method it is characterised in that Including self-cleaning filter, regulating reservoir, heterogeneous Fenton oxidation pond, flotation tank, dual membrane system, MVR system, using connecting successively Connect composition；
Described self-cleaning filter 1 filters to the cloth hair in yarn dyeing waste water, particulate matter, flco, and water outlet enters regulating reservoir 2； Described regulating reservoir 2 carries out homogeneity and by Na to the water quality of yarn dyeing waste water and the water yield2CO3It is completely transformed into Na2SO4Afterwards, water outlet is entered Enter heterogeneous Fenton oxidation pond 3, after oxidation processes, water outlet enters flotation tank 4, and air supporting produces scum silica frost and is dehydrated through filter press Become mud cake outward transport afterwards, air supporting water outlet enters dual membrane system；Described dual membrane system is made up of CMF5 and RO6, and CMF is the pre- place of RO It is ensured that the SDI value producing water is less than 3, CMF product water entrance RO, RO concentrated water enters MVR system 7 to science and engineering skill, and MVR system is to RO concentrated water It is evaporated crystallizing.
The present invention further discloses yarn-dyed fabric yarn dyeing wastewater treatment and is removing yarn-dyed fabric yarn dyeing with online recycling method The application of hardly degraded organic substance and salinity aspect in waste water.Experimental result shows：The yarn dyeing of package unit recyclable more than 90% gives up Water, the salinity in waste water can effectively be removed, salt rejection rate>99%, RO produce water and the distillate of MVR system generation can reuse Use in each production link, substitute new water consumption.
More detailed description of the present invention is as follows：
A kind of yarn-dyed fabric yarn dyeing waste water high-efficiency is processed and online recycling device, including self-cleaning filter, regulating reservoir, heterogeneous Fenton oxidation pond, flotation tank, dual membrane system（Microfiltration CMF+ reverse osmosis (RO)）, function of mechanical steam recompression（MVR）System, using according to Secondary connect and compose；
Described self-cleaning filter filters to the cloth hair in yarn dyeing waste water, particulate matter, flco etc., and water outlet enters regulating reservoir；
Described regulating reservoir carries out homogeneity to the water quality of yarn dyeing waste water and the water yield, adds in pH adjusting agent sulphuric acid and pH value, simultaneously Make the Na in waste water2CO3It is changed into Na2SO4, the water outlet entrance heterogeneous Fenton oxidation pond of regulating reservoir；
Described heterogeneous Fenton oxidation pond is decoloured to waste water and is removed part hardly degraded organic substance, and water outlet enters air supporting Pond；Add NaOH that pH value of waste water is adjusted to neutrality in described flotation tank, the flco in eliminating water and suspension are gone by air supporting effect It is ensured that water outlet clear, the one-tenth mud cake outward transport after filter press dehydration of air supporting generation scum silica frost, air supporting water outlet enters pair films to grain System；
Described dual membrane system is made up of CMF and RO, and CMF is the pretreating process of RO, and CMF produces water and enters RO, and RO concentrated water enters MVR system, RO produces Water circulation in production；Described MVR system is evaporated to RO concentrated water crystallizing, Na in waste water2SO4Purified, dense Contract, crystallize, be dried, become anhydrous sodium sulfate, can be used as selling or being back to production process outside resource product, distillate returns For producing.
A kind of yarn-dyed fabric yarn dyeing waste water high-efficiency is processed with online recycling method it is characterised in that carrying out by the steps：
（1）Self-cleaning filter filters to the cloth hair in yarn dyeing waste water, particulate matter, flco, reduce turbidity, purify water and Protection system other equipment normal work；
（2）Regulating reservoir carries out homogeneity to the water quality of yarn dyeing waste water and the water yield, according to Na in yarn dyeing waste water2CO3Content add Sulphuric acid, makes Na in waste water2CO3It is completely transformed into Na2SO4And continuously add sulfur acid for adjusting pH value to be suitable to Fenton reaction pH Value scope 5 ~ 6；
（3）It is filled with new ternary carried-type active Pd/carbon catalyst CuO-MnO in heterogeneous Fenton oxidation pond2- ZnO/AC, Total obturator accumulated amount is the 1/3 ~ 1/2 of heterogeneous Fenton oxidation pond dischargeable capacity, simultaneously in heterogeneous Fenton oxidation pond Add 30% hydrogen peroxide, 30% hydrogen peroxide dosage is 0.1-0.5kg/ ton water, the effective ingredient H in hydrogen peroxide2O2With CuO- MnO2- ZnO/AC catalyst constitutes heterogeneous Fenton oxidation system, by Oxidation, yarn dyeing waste water is decoloured and goes Except part hardly degraded organic substance, water outlet is in faint yellow；
Described ternary carried-type active Pd/carbon catalyst CuO-MnO2- ZnO/AC adopts commercially available column-shaped active carbon, with the hydrochloric acid of 5 % Soak 24 h, the NaOH solution of 5 % is soaked 24 h, is washed to neutrality, as carrier after drying activation in 120 DEG C, using leaching Stain method is prepared from.Cu load capacity is 1% ~ 5%（Mass ratio）, Mn load capacity is 1% ~ 5%（Mass ratio）, Zn load capacity be 0.1% ~ 1%（Mass ratio）；
（4）Add sodium hydroxide that pH value of waste water is adjusted to 7 ~ 8 in flotation tank, the flco in eliminating water and suspension are gone by air supporting effect Granule it is ensured that water outlet clear, after the scum silica frost that air supporting produces is dehydrated through filter press, transport outward by one-tenth mud cake；
（5）CMF, as the pretreatment of RO, removes particle, colloid, larger molecular organicses it is ensured that the SDI value of water outlet is less than 3, Reach the inflow requirement of RO；
（6）RO system adopts sea water film, realizes the concentration to yarn dyeing waste water, reduces influent load, single film for follow-up MVR technique Salt rejection rate is more than 99.5%；
（7）MVR evaporation and concentration unit includes solidifying water- to-water heat exchanger, MVR vaporizer, centrifuge and exsiccator, and control water inlet pH value is 7 ~ 8, SS<10mg/L, MVR vapo(u)rization system salt separation temperature control at 60 ~ 70 DEG C, by Na in RO concentrated water2SO4Purification, concentration, knot Brilliant, dry, it is converted into solid forms anhydrous sodium sulfate, can steam as selling or being back to production process outside resource product Send out the distillate producing and be back to production process.
Yarn-dyed fabric yarn dyeing wastewater treatment disclosed by the invention is compared with prior art had with online recycling method and device Some good effects are：
（1）Efficient process and the regeneration of yarn dyeing waste water can be realized by group technology, reduce difficult fall in comprehensive wastewater Solution Organic substance and the content of salinity, and then reduce the pollutional load of comprehensive wastewater with difficulty of governance it is ensured that comprehensive wastewater Qualified discharge；
（2）Online recycling and recycling are carried out to the value component anhydrous sodium sulfate in yarn dyeing waste water, controls from source The yield of pollutant, saves material to greatest extent, reduces production cost and the pollution treatment expense of enterprise；
（3）The new ternary carried-type active Pd/carbon catalyst CuO-MnO of filling in heterogeneous Fenton oxidation pond2- ZnO/AC, respectively Having complementary advantages between catalyst component, there is synergism it is achieved that efficiently removing hardly degraded organic substance under high salt conditions.
Brief description
Fig. 1 is the process chart that a kind of present invention yarn-dyed fabric yarn dyeing waste water high-efficiency processes with online recycling method；
Fig. 2 is this device planar structure schematic diagram；
In figure label：1 self-cleaning filter；2 regulating reservoirs；3 heterogeneous Fenton oxidation ponds；4 flotation tanks；5 CMF；6 RO；7 MVR.
Specific embodiment
Describe the present invention below by specific embodiment.Unless stated otherwise, technological means used in the present invention It is method known in those skilled in the art.In addition, embodiment is interpreted as illustrative, and the unrestricted present invention Scope, the spirit and scope of the invention are limited only by the claims that follow.To those skilled in the art, without departing substantially from this On the premise of invention spirit and scope, the material component in these embodiments and consumption are carried out various changes or are changed Belong to protection scope of the present invention.CMF therein（Continuous Microfiltration film）、RO（Reverse osmosis membrane）、 MVR（Function of mechanical steam recompression） It is all known, by commercially available.
Embodiment 1
As shown in figure 1, a kind of yarn-dyed fabric yarn dyeing waste water high-efficiency is processed and online recycling system, main inclusion self-cleaning filter 1, Regulating reservoir 2, heterogeneous Fenton oxidation pond 3, flotation tank 4, CMF5, RO6, MVR7.Using being sequentially connected composition；
Described self-cleaning filter 1 filters to the cloth hair in yarn dyeing waste water, particulate matter, flco etc., by intellectuality（PLC） Design, system can automatic identification impurity deposition velocity, discharge dirt valve signal automatic pollution discharge, self-cleaning filter 1 water outlet enter adjust Section pond 2；
Described regulating reservoir 2 carries out homogeneity to the water quality of yarn dyeing waste water and the water yield, according to Na in waste water2CO3Content add suitable Amount sulphuric acid, makes Na in waste water2CO3It is completely transformed into Na2SO4And continuously add sulfur acid for adjusting pH value to be suitable to Fenton reaction PH value range 5 ~ 6, the water outlet of regulating reservoir enters heterogeneous Fenton oxidation pond 3；
It is filled with new ternary carried-type active Pd/carbon catalyst CuO-MnO in described heterogeneous Fenton oxidation pond 32-ZnO/ AC, total obturator accumulated amount is the 1/3 ~ 1/2 of heterogeneous Fenton oxidation pond dischargeable capacity, simultaneously to heterogeneous Fenton oxidation pond Middle addition 30% hydrogen peroxide, 30% hydrogen peroxide dosage is 0.1-0.5kg/ ton water, by heterogeneous Fenton oxidation, waste water is entered Row decolouring and removal part hardly degraded organic substance, water outlet enters flotation tank 4；
Add NaOH that pH value of waste water is adjusted to 7 ~ 8 in described flotation tank 4, the scum silica frost that air supporting produces becomes after filter press dehydration Mud cake is transported outward, and air supporting water outlet enters CMF 5；
Described CMF 5 is the pretreating process of RO 6 it is ensured that producing the SDI value of water less than 3, product water enters RO 6；
After described RO 6 concentrates to CMF product water, produce Water circulation in production, concentrated water enters MVR 7 and is evaporated crystallizing；
Described MVR 7 is evaporated to RO concentrated water crystallizing, and controls water inlet pH value to be 7 ~ 8, SS<10mg/L, MVR vapo(u)rization system salinity From temperature control at 60 ~ 70 DEG C, by Na in RO concentrated water2SO4Purification, concentration and crystallization, are converted into solid forms anhydrous sodium sulfate, Can be used as selling or being back to production process outside resource product, the distillate that evaporation produces is back to production process.
Embodiment 2
A kind of yarn-dyed fabric yarn dyeing waste water high-efficiency is processed and online recycling method：
（1）Self-cleaning filter filters to the cloth hair in yarn dyeing waste water, particulate matter, flco, reduce turbidity, purify water and Protection system other equipment normal work；
（2）Regulating reservoir carries out homogeneity to the water quality of yarn dyeing waste water and the water yield, and the content according to Na2CO3 in yarn dyeing waste water adds Sulphuric acid, makes Na in waste water2CO3It is completely transformed into Na2SO4And continuously add sulfur acid for adjusting pH value to be suitable to Fenton reaction pH Value scope 5；
（3）It is filled with new ternary carried-type active Pd/carbon catalyst CuO-MnO in heterogeneous Fenton oxidation pond2- ZnO/AC, Total obturator accumulated amount is the 1/3 of heterogeneous Fenton oxidation pond dischargeable capacity, adds in heterogeneous Fenton oxidation pond simultaneously 30% hydrogen peroxide, hydrogen peroxide dosage is 0.3kg/ ton water, the effective ingredient H in hydrogen peroxide2O2With CuO-MnO2- ZnO/AC is catalyzed Agent constitutes heterogeneous Fenton oxidation system, by Oxidation, yarn dyeing waste water is decoloured and to be removed part difficult degradation organic Thing, water outlet is in faint yellow；
Described ternary carried-type active Pd/carbon catalyst CuO-MnO2- ZnO/AC adopts commercially available column-shaped active carbon, with the hydrochloric acid of 5 % Soak 24 h, the NaOH solution of 5 % is soaked 24 h, is washed to neutrality, as carrier after drying activation in 120 DEG C, using leaching Stain method is prepared from.Cu load capacity is 3%（Mass ratio）, Mn load capacity is 3%（Mass ratio）, Zn load capacity is 0.5%（Quality Than）；
（4）Add sodium hydroxide that pH value of waste water is adjusted to 7 ~ 8 in flotation tank, the flco in eliminating water and suspension are gone by air supporting effect Granule it is ensured that water outlet clear, after the scum silica frost that air supporting produces is dehydrated through filter press, transport outward by one-tenth mud cake；
（5）CMF, as the pretreatment of RO, removes particle, colloid, larger molecular organicses it is ensured that the SDI value of water outlet is less than 3, Reach the inflow requirement of RO；
（6）RO system adopts sea water film, realizes the concentration to yarn dyeing waste water, reduces influent load, single film for follow-up MVR technique Salt rejection rate is more than 99.5%；
（7）MVR evaporation and concentration unit includes solidifying water- to-water heat exchanger, MVR vaporizer, centrifuge and exsiccator, and control water inlet pH value is 7 ~ 8, SS<10mg/L, MVR vapo(u)rization system salt separation temperature control at 60 DEG C, by Na in RO concentrated water2SO4Purify, concentrate, crystallizing, It is dried, be converted into solid forms anhydrous sodium sulfate, can be used as selling or being back to production process outside resource product, evaporation is produced Raw distillate is back to production process.
Embodiment 3
Practical situations explanation
Certain enterprises northern, yarn dyeing operation wastewater discharge is 200m3/ d, Na2SO4Concentration is 3.5%, Na2CO3Concentration is 1.2%, COD are 1200 ~ 1300mg/L, and SS is 10 ~ 100 mg/L, and colourity is 50 ~ 10000 times, and pH is 9-11.
Process according to the yarn-dyed fabric yarn dyeing waste water high-efficiency that the present invention provides and processed with online recycling method and device.
By self-cleaning filter 1, the cloth hair in yarn dyeing waste water, particulate matter, flco etc. are filtered, water outlet enters adjusts Section pond 2；Regulating reservoir 2 carries out homogeneity to the water quality of yarn dyeing waste water and the water yield, adds sulphuric acid to make Na in waste water2CO3It is completely transformed into Na2SO4And continuously adding sulfur acid for adjusting pH value to 5 ~ 6, the water outlet of regulating reservoir enters heterogeneous Fenton oxidation pond 3；Heterogeneous It is filled with new ternary carried-type active Pd/carbon catalyst CuO-MnO in Fenton oxidation pond 32- ZnO/AC, total obturator accumulated amount For the 1/2 of heterogeneous Fenton oxidation pond dischargeable capacity, 30% hydrogen peroxide dosage is 0.5kg/ ton water, the time of staying in this pond For 2h, water outlet entrance flotation tank 4；Add NaOH that pH value of waste water is adjusted to 7 ~ 8 in flotation tank 4, the scum silica frost that air supporting produces is through sheet frame Mud cake outward transport is become, air supporting water outlet enters CMF 5 after pressure filter dehydration；CMF 5 produces water and enters RO 6；RO 6 produces water to CMF to be carried out After concentration, concentrated water enters MVR 7；It is 7 ~ 8, SS that MVR 7 controls water inlet pH value<10mg/L, MVR vapo(u)rization system salt separation temperature control System at 60 ~ 70 DEG C, evaporation, crystallization, be dried after generate anhydrous sodium sulfate.
Operation result shows, the yarn dyeing waste water of package unit recyclable more than 90%, and reclaiming the water yield average day is 172.6m3/ d.Salinity in waste water is effectively removed, salt rejection rate>99%, RO produce water and the distillate of MVR system generation can be back to respectively Production link uses, and substitutes new water consumption；
By GB/T6009-2003《Industrial anhydrous sodium sulfate》Standard require and the analysis method specified is to the anhydrous slufuric acid reclaiming Sodium quality is analyzed, and analysis result is as implied above.ReferenceSpecified in anhydrous sodium sulfate quality standard, The anhydrous sodium sulfate reclaiming can reach national three class standard Grade A levels, run duration, and average day reclaims anhydrous sodium sulfate 8.28t/d, based on univalent 300 yuan/t, 0.25 ten thousand yuan of daily extra earning.

Claims (3)

1. a kind of yarn-dyed fabric yarn dyeing wastewater treatment with online recycling method it is characterised in that carrying out by the steps：
（1）Self-cleaning filter filters to the cloth hair in yarn dyeing waste water, particulate matter, flco, reduces turbidity, purifies water；
（2）Regulating reservoir carries out homogeneity to the water quality of yarn dyeing waste water and the water yield, according to Na in yarn dyeing waste water2CO3Content determine plus Enter the amount of sulphuric acid, make Na in waste water2CO3It is completely transformed into Na2SO4And it is anti-to being suitable to Fenton to continuously add sulfur acid for adjusting pH value The pH value range 5 ~ 6 answered；
（3）Filling ternary carried-type active Pd/carbon catalyst CuO-MnO in heterogeneous Fenton oxidation pond2- ZnO/AC, total obturator Accumulated amount is the 1/3 ~ 1/2 of heterogeneous Fenton oxidation pond dischargeable capacity, adds 30% in heterogeneous Fenton oxidation pond simultaneously （w/w）Hydrogen peroxide, dosage is 0.1-0.5kg/ ton water；
Described ternary carried-type active Pd/carbon catalyst CuO-MnO2- ZnO/AC refers to：Using commercially available column-shaped active carbon, use 5 % （w/w）Soak with hydrochloric acid 24 h, 5 %（w/w）NaOH solution soak 24 h, be washed to neutrality, in 120 DEG C dry activation Afterwards as carrier；Cu load capacity is 1% ~ 5%（w/w）, Mn load capacity is 1% ~ 5%（w/w）, Zn load capacity is 0.1% ~ 1%（w/w）；
（4）Add sodium hydroxide that pH value of waste water is adjusted to 7 ~ 8 in flotation tank, the flco in eliminating water and suspension are gone by air supporting effect Granule it is ensured that water outlet clear, after the scum silica frost that air supporting produces is dehydrated through filter press, transport outward by one-tenth mud cake；
（5）CMF, as the pretreating process of RO, removes particle, colloid, larger molecular organicses it is ensured that the SDI value of water outlet is little In 3, reach the inflow requirement of RO；
（6）RO system adopts sea water film, realizes the concentration to yarn dyeing waste water, reduces influent load, single film for follow-up MVR technique Salt rejection rate is more than 99.5%；
（7）MVR evaporation and concentration unit includes：Solidifying water- to-water heat exchanger, MVR vaporizer, centrifuge and exsiccator, control water inlet pH value For 7 ~ 8, SS<10mg/L, MVR vapo(u)rization system salt separation temperature control at 60 ~ 70 DEG C, by Na in RO concentrated water2SO4Purify, concentrate, Crystallize, be dried, be converted into solid forms anhydrous sodium sulfate.
2. yarn-dyed fabric yarn dyeing wastewater treatment described in claim 1 and online recycling method are removing difficult fall in yarn-dyed fabric yarn dyeing waste water Solution Organic substance and the application of salinity aspect.
3. yarn-dyed fabric yarn dyeing wastewater treatment described in claim 1 and the device of online recycling method are it is characterised in that include from clearly Washed filter, regulating reservoir, heterogeneous Fenton oxidation pond, flotation tank, dual membrane system, MVR system, using being sequentially connected composition；
Described self-cleaning filter（1）Cloth hair in yarn dyeing waste water, particulate matter, flco are filtered, water outlet enters regulating reservoir （2）；
Described regulating reservoir（2）Water quality to yarn dyeing waste water and the water yield carry out homogeneity and by Na2CO3It is completely transformed into Na2SO4Afterwards, Water outlet enters heterogeneous Fenton oxidation pond（3）, after oxidation processes, water outlet enters flotation tank（4）, the scum silica frost that air supporting produces is through plate Mud cake outward transport is become, air supporting water outlet enters dual membrane system after the dehydration of frame pressure filter；Described dual membrane system is by CMF（5）And RO（6）Group Become, CMF is that the pretreating process of RO enters RO it is ensured that the SDI value of product water is less than 3, CMF product water, and RO concentrated water enters MVR system （7）, MVR system RO concentrated water is evaporated crystallize.
CN201611040360.XA 2016-11-24 2016-11-24 Yarn-dyed fabric yarn dyeing waste water treatment and online recycling method and device Pending CN106430792A (en)

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