CN105502715A - Method for recovering dye and dispersing agent in printing and dyeing wastewater - Google Patents
Method for recovering dye and dispersing agent in printing and dyeing wastewater Download PDFInfo
- Publication number
- CN105502715A CN105502715A CN201510863320.4A CN201510863320A CN105502715A CN 105502715 A CN105502715 A CN 105502715A CN 201510863320 A CN201510863320 A CN 201510863320A CN 105502715 A CN105502715 A CN 105502715A
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- CN
- China
- Prior art keywords
- waste water
- dyestuff
- concentrated
- ceramic membrane
- nanofiltration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
-
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
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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
- 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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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a method for recovering dye and a dispersing agent in printing and dyeing wastewater. According to the method, dye in the wastewater is intercepted through plate-frame pressure filtration, filtrate obtained through plate-frame pressure filtration further enters a nanofiltration system, and the dispersing agent is intercepted and recovered by the nanofiltration system. With the adoption of the method, the dye and the dispersing agent in the printing and dyeing wastewater can be separately recovered, the treatment difficulty of the wastewater is reduced, and the wastewater treatment cost is also saved.
Description
Technical field
The present invention relates to techniques of Dyeing Wastewater Treatment field, especially relate to a kind of method being reclaimed Wastewater Dyes and dispersion agent by filter press and nanofiltration system.
Background technology
Factory effluent one of primary pollution source becoming water body of DYE PRODUCTION industry, and due to most dyestuff be poisonous hardly degraded organic substance, its chemical stability is strong, there is carcinogenic, teratogenesis, mutagenic " three-induced effect ", therefore, even if organism concentration remaining in waste water is very low, also irreversible destruction can be caused to water ecological setting.On the other hand, for the ease of high to permutation degree, that fiber gap is few, hydrophobicity is strong polyamide fibre and terylene colouring, the dispersed dye with better hydrophobic performance are widely used in modern industry, containing polar group (as hydroxyl, amino, hydroxyl alkylamino, cyanogen alkylamino etc.) in the molecule of dispersed dye, belong to nonionic dye, this kind of dyestuff needs, in the presence of dispersants through shredder grinding, to become high dispersing, uniform and stable suspension could use usually.
At present, the production wastewater treatment of DYE PRODUCTION industry focuses on reduction discharge of wastewater.The a large amount of mother liquor waste water produced in DYE PRODUCTION process and washes are back to the washing of filter cake by common waste water treatment process after treatment, reduce discharge of wastewater.But above-mentioned treatment process is not reclaimed the dyestuff in factory effluent, dispersion agent, cause the great wasting of resources, and economic benefit is not good.
Summary of the invention
For the problems referred to above that prior art exists, the applicant provides a kind of method reclaiming dye well dispersion agent in dyeing waste water.The inventive method had both reduced wastewater treatment difficulty, in turn saved cost for wastewater treatment, served multiple.
Technical scheme of the present invention is as follows:
In dyeing waste water, reclaim a method for dye well dispersion agent, described method comprises the steps:
(1) dyeing waste water is collected, and waste water is concentrated through ceramic membrane filter, with the concentrated solution of solid small particles together with dyestuff slurries at filter press, the small-particle dye granule in dyestuff slurries and ceramic membrane filter being concentrated gained retains formation filter cake, reclaims dyestuff; Described ceramic membrane interception aperture is 0.08 ~ 0.5 μm;
(2) in step (1), the filtrate of filter press gained enters nanofiltration system, and the dispersion agent in dyestuff slurries is trapped within nanofiltration concentrated solution, is concentrated, and remaining water and minerals, through film core, enters filtrate; The nanofiltration membrane molecular weight cut-off of described nanofiltration system is 200 ~ 500.
The entrance pressure pressure of described ceramic membrane is 0.1 ~ 0.5MPa, and going out pressure pressure is 1 ~ 5MPa, and the temperature of described waste water and dyestuff slurries is 30 ~ 50 DEG C.
The working pressure of described nanofiltration system is 2 ~ 6MPa, and the filtrate temperature entering nanofiltration system is 30 ~ 50 DEG C.
The molecular weight of described dispersion agent is 600 ~ 900.
The technique effect that the present invention is useful is:
The inventive method can reclaim the dye well dispersion agent in disperse dye factory effluent respectively, has both reduced wastewater treatment difficulty, and has in turn saved cost for wastewater treatment.
Embodiment
Below in conjunction with embodiment, the present invention is specifically described.
Embodiment 1
In dyeing waste water, reclaim a method for dye well dispersion agent, described method comprises the steps:
(1) dyeing waste water is collected, and waste water is concentrated through ceramic membrane filter, with the concentrated solution of solid small particles together with dyestuff slurries at filter press, the small-particle dye granule in dyestuff slurries and ceramic membrane filter being concentrated gained retains formation filter cake, reclaims dyestuff; Described ceramic membrane interception aperture is 0.5 μm; The entrance pressure pressure of described ceramic membrane is 0.5MPa, and going out pressure pressure is 1MPa, and the temperature of described waste water and dyestuff slurries is 40 DEG C.
(2) in step (1), the filtrate of filter press gained enters nanofiltration system (nanofiltration membrane molecular weight cut-off is 500), dispersion agent in dyestuff slurries is trapped within (molecular weight of dispersion agent is 900) in nanofiltration concentrated solution, concentrated, remaining water and minerals, through film core, enters filtrate; .The working pressure of described nanofiltration system is 4MPa, and the filtrate temperature entering nanofiltration system is 40 DEG C.
Embodiment 2
In dyeing waste water, reclaim a method for dye well dispersion agent, described method comprises the steps:
(1) dyeing waste water is collected, and waste water is concentrated through ceramic membrane filter, with the concentrated solution of solid small particles together with dyestuff slurries at filter press, the small-particle dye granule in dyestuff slurries and ceramic membrane filter being concentrated gained retains formation filter cake, reclaims dyestuff; Described ceramic membrane interception aperture is 0.3 μm; The entrance pressure pressure of described ceramic membrane is 0.1MPa, and going out pressure pressure is 5MPa, and the temperature of described waste water and dyestuff slurries is 30 DEG C.
(2) in step (1), the filtrate of filter press gained enters nanofiltration system (nanofiltration membrane molecular weight cut-off is 500), dispersion agent in dyestuff slurries is trapped within (molecular weight of dispersion agent is 600) in nanofiltration concentrated solution, concentrated, remaining water and minerals, through film core, enters filtrate; .The working pressure of described nanofiltration system is 2MPa, and the filtrate temperature entering nanofiltration system is 50 DEG C.
Embodiment 3
In dyeing waste water, reclaim a method for dye well dispersion agent, described method comprises the steps:
(1) dyeing waste water is collected, and waste water is concentrated through ceramic membrane filter, with the concentrated solution of solid small particles together with dyestuff slurries at filter press, the small-particle dye granule in dyestuff slurries and ceramic membrane filter being concentrated gained retains formation filter cake, reclaims dyestuff; Described ceramic membrane interception aperture is 0.08 μm; The entrance pressure pressure of described ceramic membrane is 0.3MPa, and going out pressure pressure is 2MPa, and the temperature of described waste water and dyestuff slurries is 50 DEG C.
(2) in step (1), the filtrate of filter press gained enters nanofiltration system (nanofiltration membrane molecular weight cut-off is 400), dispersion agent in dyestuff slurries is trapped within (molecular weight of dispersion agent is 800) in nanofiltration concentrated solution, concentrated, remaining water and minerals, through film core, enters filtrate; .The working pressure of described nanofiltration system is 6MPa, and the filtrate temperature entering nanofiltration system is 50 DEG C.
Claims (4)
1. in dyeing waste water, reclaim a method for dye well dispersion agent, it is characterized in that described method comprises the steps:
(1) dyeing waste water is collected, and waste water is concentrated through ceramic membrane filter, with the concentrated solution of solid small particles together with dyestuff slurries at filter press, the small-particle dye granule in dyestuff slurries and ceramic membrane filter being concentrated gained retains formation filter cake, reclaims dyestuff; Described ceramic membrane interception aperture is 0.08 ~ 0.5 μm;
(2) in step (1), the filtrate of filter press gained enters nanofiltration system, and the dispersion agent in dyestuff slurries is trapped within nanofiltration concentrated solution, is concentrated, and remaining water and minerals, through film core, enters filtrate; The nanofiltration membrane molecular weight cut-off of described nanofiltration system is 200 ~ 500.
2. method according to claim 1, is characterized in that the entrance pressure pressure of described ceramic membrane is 0.1 ~ 0.5MPa, and going out pressure pressure is 1 ~ 5MPa, and the temperature of described waste water and dyestuff slurries is 30 ~ 50 DEG C.
3. method according to claim 1, is characterized in that the working pressure of described nanofiltration system is 2 ~ 6MPa, and the filtrate temperature entering nanofiltration system is 30 ~ 50 DEG C.
4. method according to claim 1, is characterized in that the molecular weight of described dispersion agent is 600 ~ 900.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510863320.4A CN105502715A (en) | 2015-11-30 | 2015-11-30 | Method for recovering dye and dispersing agent in printing and dyeing wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510863320.4A CN105502715A (en) | 2015-11-30 | 2015-11-30 | Method for recovering dye and dispersing agent in printing and dyeing wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105502715A true CN105502715A (en) | 2016-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510863320.4A Pending CN105502715A (en) | 2015-11-30 | 2015-11-30 | Method for recovering dye and dispersing agent in printing and dyeing wastewater |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108793460A (en) * | 2018-06-05 | 2018-11-13 | 安徽阜南县万家和工艺品有限公司 | A kind of purifying treatment method to woodwork dyestuff waste liquid |
| CN108946983A (en) * | 2018-06-27 | 2018-12-07 | 江苏华尔化工有限公司 | A kind of recycling technique of non-water soluble dye commercialization technique waste water |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050274669A1 (en) * | 2004-06-04 | 2005-12-15 | Wastech International, Inc. | Wastewater treatment system |
| CN102241894A (en) * | 2010-12-23 | 2011-11-16 | 三达膜科技（厦门）有限公司 | Method for recovering dye and dispersing agent from dispersed dye production wastewater |
| CN102259938A (en) * | 2011-05-17 | 2011-11-30 | 周宇松 | Reduction and recycling method for purified cotton cooking and cleaning wastewater |
-
2015
- 2015-11-30 CN CN201510863320.4A patent/CN105502715A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050274669A1 (en) * | 2004-06-04 | 2005-12-15 | Wastech International, Inc. | Wastewater treatment system |
| CN102241894A (en) * | 2010-12-23 | 2011-11-16 | 三达膜科技（厦门）有限公司 | Method for recovering dye and dispersing agent from dispersed dye production wastewater |
| CN102259938A (en) * | 2011-05-17 | 2011-11-30 | 周宇松 | Reduction and recycling method for purified cotton cooking and cleaning wastewater |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108793460A (en) * | 2018-06-05 | 2018-11-13 | 安徽阜南县万家和工艺品有限公司 | A kind of purifying treatment method to woodwork dyestuff waste liquid |
| CN108946983A (en) * | 2018-06-27 | 2018-12-07 | 江苏华尔化工有限公司 | A kind of recycling technique of non-water soluble dye commercialization technique waste water |
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Application publication date: 20160420 |