CN108975457A - A kind of method of ultrafiltration centrifugation joint filter membrane recycling Polyvinyl Alcohol in Desizing Wastewater - Google Patents
A kind of method of ultrafiltration centrifugation joint filter membrane recycling Polyvinyl Alcohol in Desizing Wastewater Download PDFInfo
- Publication number
- CN108975457A CN108975457A CN201710409385.0A CN201710409385A CN108975457A CN 108975457 A CN108975457 A CN 108975457A CN 201710409385 A CN201710409385 A CN 201710409385A CN 108975457 A CN108975457 A CN 108975457A
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- China
- Prior art keywords
- desizing
- filter membrane
- polyvinyl alcohol
- liquid
- ultrafiltration
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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
-
- 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
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L29/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
- C08L29/02—Homopolymers or copolymers of unsaturated alcohols
- C08L29/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
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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
-
- 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
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- 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
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Polymers & Plastics (AREA)
- Medicinal Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a kind of methods of ultrafiltration centrifugation joint filter membrane recycling Polyvinyl Alcohol in Desizing Wastewater, this method is will to be centrifuged to take out supernatant through ultrafiltration after the dilution of desizing waste liquid, supernatant is at 60-80 DEG C, under the conditions of 0.2-0.4Mpa after polyether sulfone/polyethersulfone hollow fiber ultrafiltration membrane filtration treatment, the solid filtered out with clear water flushing membrane, obtained solvent portions are reusable PVA recovered liquid, and the liquid of filtration is transported in head tank with centrifugal pump for diluting desizing waste liquid.It does not need to add other salt and flocculation agent using method of the invention, reduce costs, while the concentration of PVA in recovered liquid can be significantly improved, the purification step before reducing PVA recycling.PVA recovered liquid after processed by the invention is used directly for printing and dyeing.
Description
Technical field
The present invention relates to treatment of dyeing wastewater fields, it is more particularly related to which a kind of ultrafiltration is centrifuged joint filter membrane
The method for recycling Polyvinyl Alcohol in Desizing Wastewater.
Background technique
Polyvinyl alcohol (PVA) is a kind of water soluble polymer, has easily film forming and conjunctiva intensity height, antifriction
It wipes, be soluble in the good characteristics such as hot water, recoverable.In textile industry, in order to improve the intensity of yarn, wearability and can knit
Degree, PVA are widely used as the sizing agent of fabric.
PVA is soluble in hot water, and in desizing, this high molecular polymer difficult to degrade contains the COD of waste water
Amount is high.Using PVA as the desized wastewater of slurry, COD content is up to 8000 mg/L or more, and biodegradability is poor, BOD5/CODcr
For value less than 0.09, traditional biochemical method and single technology are difficult to primary processing up to standard.Dye-printing desizing waste water containing PVA is direct
After being discharged into water body, PVA can largely be accumulated in water environment, caused water surface foam to increase viscosity increase, influenced aerobic micro- life
The activity of object, to cause serious environmental problem.Traditional PVA processing method is mostly salting out method and chemical flocculation, although
These method processing costs are low, but due in the PVA of precipitating impurity it is more, be unable to reach the requirement of recycling.
But it is based on target of sustainable development, in terms of to the dye-printing desizing waste water Treatment process containing PVA, it is ensured that efficiently
Remove PVA target of comprehensive ecological improvement simultaneously, also to realize as far as possible it is energy-saving, avoid secondary pollution, sufficiently recycle it is valuable
The environmental economy comprehensive benefit target such as PVA resource, be only and administer the developing direction of the dye-printing desizing waste water technology of PVA from now on.
Therefore a kind of PVA that high efficiente callback is reusable is developed to have great importance.
Summary of the invention
A kind of method of ultrafiltration centrifugation joint filter membrane recycling Polyvinyl Alcohol in Desizing Wastewater, specific preparation method includes following
Step:
(1) it after desizing waste liquid being diluted with water, is transferred in ultra-filtration centrifuge tube, is centrifuged 10- under the conditions of 7500-15000rpm
Supernatant is taken out after 30min；
(2) supernatant after centrifugation is transferred in head tank, supernatant is transported in membrane-filtering unit by starting centrifugal pump, is passed through
The molecular cut off for controlling filter membrane is 10-80K, and filtration temperature is 40-80 DEG C, after pressure is 0.1-0.8Mpa, to supernatant
Handle 10-40min；
(3) supernatant is after membrane filtration is handled, the solid filtered out with clear water flushing membrane, and its dissolution filter is recycled, solvent portions
The liquid of as reusable PVA recovered liquid, filtration is transported in head tank with centrifugal pump for diluting desizing waste liquid.
Preferably, the degree of polymerization of PVA is 1500-2100 in desizing liquid described in step (1).
Preferably, the multiple that desizing liquid described in step (1) is diluted with water is 2-4 times.
Preferably, the molecular cut off of ultra-filtration centrifuge tube as described in step (1) is 150K.
Preferably, the speed of ultrafiltration centrifugation as described in step (1) is 10000-12000rpm, centrifugation time 15-
20min。
Preferably, filter membrane used in step (2) is polyether sulfone/polyethersulfone hollow fiber ultrafiltration membrane of sulfonation, the face of film
Product is 0.1 square metre.
Preferably, the molecular cut off of filter membrane used in step (2) is 30-40K.
Preferably, the temperature of the processing of filter membrane used in step (2) is 65-80 DEG C, pressure 0.2-0.4Mpa, used
Filter membrane processing is 20-30min.
Preferably, the amount of clear water used is 5-10 times of membrane-filtering unit cavity volume in step (3).
Preferably, the content of PVA is 10%-20% in desizing water recovered liquid obtained in step (3).
The method and tradition of a kind of ultrafiltration centrifugation joint filter membrane recycling Polyvinyl Alcohol in Desizing Wastewater of the present invention are made
Preparation Method is compared, and using the technology of ultrafiltration centrifugation and UF membrane, is centrifuged off the solid in dyestuff desizing waste liquid using ultrafiltration
Then particle and supramolecular polymer recycle membrane separation technique to remove small molecule compound, pass through the connection of two kinds of technologies
Conjunction can remove most substance in desized wastewater, significantly improve the concentration of PVA in recovered liquid.In addition, method of the invention is not
Need to add other salt and flocculation agent, the cost not only reduced, the purification step before reducing PVA recycling.Through
Treated that PVA recovered liquid is used directly for printing and dyeing by the present invention.
Detailed description of the invention
Attached drawing 1 is flow chart of the invention.
Specific embodiment
A kind of ultrafiltration centrifugation joint filter membrane of the present invention is recycled in desized wastewater below with reference to specific embodiment
The method of polyvinyl alcohol is further elaborated, to help those skilled in the art to inventive concept of the invention, technical side
Case has more complete, accurate and deep understanding.
Embodiment 1
A kind of method of ultrafiltration centrifugation joint filter membrane recycling Polyvinyl Alcohol in Desizing Wastewater, comprising the following steps: (1) desizing is given up
After liquid is diluted with water 2 times, it is transferred in the ultra-filtration centrifuge tube that molecular cut off is 150K, is centrifuged under the conditions of 12000rpm
Supernatant is taken out after 20min；(2) supernatant after centrifugation is transferred in head tank, supernatant is transported to by starting centrifugal pump
In membrane-filtering unit, polyether sulfone/polyethersulfone hollow fiber ultrafiltration membrane molecular cut off is 40K, and setting filtration temperature is 65 DEG C, if
Pressure is set to handle 25min to supernatant after 0.4Mpa；(3) supernatant rinses membrane filtration with 5 times of clear water after membrane filtration is handled
Solid out, and its dissolution filter is recycled, solvent portions are reusable PVA recovered liquid, the liquid of filtration with from
Heart pump is transported in head tank for diluting desizing waste liquid.
Embodiment 2
A kind of method of ultrafiltration centrifugation joint filter membrane recycling Polyvinyl Alcohol in Desizing Wastewater, comprising the following steps: (1) desizing is given up
After liquid is diluted with water 2 times, it is transferred in the ultra-filtration centrifuge tube that molecular cut off is 150K, is centrifuged under the conditions of 15000rpm
Supernatant is taken out after 15min；(2) supernatant after centrifugation is transferred in head tank, supernatant is transported to by starting centrifugal pump
In membrane-filtering unit, polyether sulfone/polyethersulfone hollow fiber ultrafiltration membrane molecular cut off is 35K, and setting filtration temperature is 70 DEG C, if
Pressure is set to handle 30min to supernatant after 0.4Mpa；(3) supernatant rinses membrane filtration with 7 times of clear water after membrane filtration is handled
Solid out, and its dissolution filter is recycled, solvent portions are reusable PVA recovered liquid, the liquid of filtration with from
Heart pump is transported in head tank for diluting desizing waste liquid.
Embodiment 3
A kind of method of ultrafiltration centrifugation joint filter membrane recycling Polyvinyl Alcohol in Desizing Wastewater, comprising the following steps: (1) desizing is given up
After liquid is diluted with water 2 times, it is transferred in the ultra-filtration centrifuge tube that molecular cut off is 150K, is centrifuged under the conditions of 15000rpm
Supernatant is taken out after 15min；(2) supernatant after centrifugation is transferred in head tank, supernatant is transported to by starting centrifugal pump
In membrane-filtering unit, polyether sulfone/polyethersulfone hollow fiber ultrafiltration membrane molecular cut off is 40K, and setting filtration temperature is 80 DEG C, if
Pressure is set to handle 20min to supernatant after 0.3Mpa；(3) supernatant rinses membrane filtration with 10 times of clear water after membrane filtration is handled
Solid out, and its dissolution filter is recycled, solvent portions are reusable PVA recovered liquid, the liquid of filtration with from
Heart pump is transported in head tank for diluting desizing waste liquid.
The PVA recovered liquid difference that embodiment 1-3 preparation method obtains is as shown in table 1.
| Test item | The PVA rate of recovery (%) (%) | Recovered liquid PVA concentration |
| Embodiment 1 | 92.1% | 12.6% |
| Embodiment 2 | 94.3% | 14.1% |
| Embodiment 3 | 95.2% | 13.4% |
| Comparative example 1 | 92.2% | 11.8% |
| Comparative example 2 | 93.6% | 13.2% |
For the ordinary skill in the art, specific embodiment is only exemplarily described the present invention,
Obviously the present invention specific implementation is not subject to the restrictions described above, as long as use the inventive concept and technical scheme of the present invention into
The improvement of capable various unsubstantialities, or not improved the conception and technical scheme of the invention are directly applied to other occasions
, it is within the scope of the present invention.
Claims (10)
1. a kind of method of ultrafiltration centrifugation joint filter membrane recycling Polyvinyl Alcohol in Desizing Wastewater, which is characterized in that including following step
It is rapid:
(1) it after desizing waste liquid being diluted with water, is transferred in ultra-filtration centrifuge tube, is centrifuged 10- under the conditions of 7500-15000rpm
Supernatant is taken out after 30min；
(2) supernatant after centrifugation is transferred in head tank, supernatant is transported in membrane-filtering unit by starting centrifugal pump, is passed through
The molecular cut off for controlling filter membrane is 10-80K, and filtration temperature is 40-80 DEG C, after pressure is 0.1-0.8Mpa, to supernatant
Handle 10-40min；
(3) supernatant is after membrane filtration is handled, the solid filtered out with clear water flushing membrane, and its dissolution filter is recycled, solvent portions
The liquid of as reusable PVA recovered liquid, filtration is transported in head tank with centrifugal pump for diluting desizing waste liquid.
2. a kind of side of ultrafiltration centrifugation joint filter membrane recycling Polyvinyl Alcohol in Desizing Wastewater described in liquid according to claim 1
Method, it is characterised in that the degree of polymerization of PVA is 1500-2100 in desizing liquid described in step (1).
3. a kind of side of ultrafiltration centrifugation joint filter membrane recycling Polyvinyl Alcohol in Desizing Wastewater described in liquid according to claim 1
Method, it is characterised in that the multiple that desizing liquid described in step (1) is diluted with water is 2-4 times.
4. a kind of side of ultrafiltration centrifugation joint filter membrane recycling Polyvinyl Alcohol in Desizing Wastewater described in liquid according to claim 1
Method, it is characterised in that the molecular cut off of ultra-filtration centrifuge tube as described in step (1) is 150K.
5. a kind of side of ultrafiltration centrifugation joint filter membrane recycling Polyvinyl Alcohol in Desizing Wastewater described in liquid according to claim 1
Method, it is characterised in that the speed of ultrafiltration centrifugation as described in step (1) is 10000-12000rpm, centrifugation time 15-
20min。
6. a kind of side of ultrafiltration centrifugation joint filter membrane recycling Polyvinyl Alcohol in Desizing Wastewater described in liquid according to claim 1
Method, it is characterised in that filter membrane used in step (2) is polyether sulfone/polyethersulfone hollow fiber ultrafiltration membrane of sulfonation, the area of film
It is 0.1 square metre.
7. a kind of side of ultrafiltration centrifugation joint filter membrane recycling Polyvinyl Alcohol in Desizing Wastewater described in liquid according to claim 1
Method, it is characterised in that the molecular cut off of filter membrane used in step (2) is 30-40K.
8. a kind of side of ultrafiltration centrifugation joint filter membrane recycling Polyvinyl Alcohol in Desizing Wastewater described in liquid according to claim 1
Method, it is characterised in that the temperature of the processing of filter membrane used in step (2) is 65-80 DEG C, pressure 0.2-0.4Mpa, filter used
Film process is 20-30min.
9. a kind of side of ultrafiltration centrifugation joint filter membrane recycling Polyvinyl Alcohol in Desizing Wastewater described in liquid according to claim 1
Method, it is characterised in that the amount of clear water used is 5-10 times of membrane-filtering unit cavity volume in step (3).
10. a kind of side of ultrafiltration centrifugation joint filter membrane recycling Polyvinyl Alcohol in Desizing Wastewater described in liquid according to claim 1
Method, it is characterised in that the content of PVA is 10%-20% in desizing water recovered liquid obtained in step (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710409385.0A CN108975457A (en) | 2017-06-02 | 2017-06-02 | A kind of method of ultrafiltration centrifugation joint filter membrane recycling Polyvinyl Alcohol in Desizing Wastewater |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710409385.0A CN108975457A (en) | 2017-06-02 | 2017-06-02 | A kind of method of ultrafiltration centrifugation joint filter membrane recycling Polyvinyl Alcohol in Desizing Wastewater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021002820A1 (en) * | 2019-07-01 | 2021-01-07 | Veri̇tas Teksti̇l Konfeksi̇yon Pazarlama Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ | Method for production of poly-vinyl alcohol -filament fibre of high strength and elasticity |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1062517A (en) * | 1992-01-18 | 1992-07-08 | 中国纺织大学 | Comprehensive treatment technology for waste sizing liquid |
| CN102491454A (en) * | 2011-12-20 | 2012-06-13 | 大连理工大学 | Desized wastewater ultrafiltration pretreatment system based on jet aeration |
-
2017
- 2017-06-02 CN CN201710409385.0A patent/CN108975457A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1062517A (en) * | 1992-01-18 | 1992-07-08 | 中国纺织大学 | Comprehensive treatment technology for waste sizing liquid |
| CN102491454A (en) * | 2011-12-20 | 2012-06-13 | 大连理工大学 | Desized wastewater ultrafiltration pretreatment system based on jet aeration |
Non-Patent Citations (2)
| Title |
|---|
| 李文销: "超滤膜处理聚乙烯醇废水", 《科技信息》 * |
| 臧学丽等: "《实用发酵工程技术 供药品生产技术、药品生物技术、药学专业用》", 31 January 2017, 中国医药科技出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021002820A1 (en) * | 2019-07-01 | 2021-01-07 | Veri̇tas Teksti̇l Konfeksi̇yon Pazarlama Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ | Method for production of poly-vinyl alcohol -filament fibre of high strength and elasticity |
| US11982020B2 (en) | 2019-07-01 | 2024-05-14 | Veritas Tekstil Konfeksiyon Pazarlama Sanayi Ve Ticaret Anonim Sirketi | Method for production of poly-vinyl alcohol-filament fibre of high strength and elasticity |
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Application publication date: 20181211 |