CN102351268A - Method of recycling inorganic salt in dyeing wastewater - Google Patents
Method of recycling inorganic salt in dyeing wastewater Download PDFInfo
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- CN102351268A CN102351268A CN2011101763232A CN201110176323A CN102351268A CN 102351268 A CN102351268 A CN 102351268A CN 2011101763232 A CN2011101763232 A CN 2011101763232A CN 201110176323 A CN201110176323 A CN 201110176323A CN 102351268 A CN102351268 A CN 102351268A
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Abstract
The invention relates to a method of recycling inorganic salt in dyeing wastewater, comprising the following steps of: (1) injecting inorganic salt containing dyeing wastewater into a water oil separator, then adding organic solvent into the water oil separator, stirring for 1-15 min, standing for delamination; (2) separating out a subnatant inorganic salt aqueous solution, adjusting pH value by acid, getting into dyeing technology for recycling; letting supernatant organic solvent, water and dyes go through a solvent recovery to recover the organic solvent. The method provided by the invention has a low cost, a low requirement on equipments and a simple operation method, can realize the recycling of massive inorganic salt in printing and dyeing industry. The processed salt-free wastewater is convenient for the following decoloration and degradation treatment, and simultaneously the complete recovery and cycling utilization of the solvent is realized. The process has advantages of no secondary pollution and water saving wastewater minimization.
Description
Technical field
The invention belongs to the aftertreatment field of dyeing waste-water, the method for inorganic salt in particularly a kind of recycle dyeing waste-water.
Background technology
In the dyeing course of processing, the use of a large amount of inorganic salt also causes serious environmental to pollute when improving dyeing quality, has increased the difficulty that dyeing waste-water is handled simultaneously.Wherein, reactive dyeing sewage becomes inorganic salt lavish consumer especially undisputedly.In the reactive dyeing operation, need to add a large amount of inorganic salt, to reach the purpose of dyestuff to dying in the fabric absorption.Generally, deep-colour fabric is painted with dying on the salt in the fixation operation in the reactive dyestuffs, needs to add the anhydrous sodium sulphate of about 50g/L and the yellow soda ash of about 40g/L.The water consumption of every kilogram of raw cotton (125g/m) reaches 50L in the dyeing course; Directly Lang Fei inorganic salt are above 3 kilograms; The inorganic salt amount of middle-size and small-size printing and dyeing mill daily consumption just reaches 40 tons; The annual dyeing in the whole nation consumes the salt amount and is about 900,000 tons; At present a lot of dyeing waste-water treatment processs are applicable to salt-free colorful wastewater mostly; And the existence of a large amount of inorganic salt in actual dyeing back is unfavorable for that the degraded of waste water from dyestuff is removed.Disposable use inorganic salt in the printing and dyeing course of processing cause waste, have caused the increase of printing and dyeing tooling costs.Along with national 11th Five-Year reduces discharging the enforcement of statutory standard and the transformation of domestic and international economic overall situation, dyeing has welcome new challenge.
Summary of the invention
Technical problem to be solved by this invention provides the method for inorganic salt in a kind of recycle dyeing waste-water, and this method is with low cost, to equipment require lowly, and working method is simple, can realize the recycle to a large amount of inorganic salt in the printing and dyeing industry.
The method of inorganic salt in a kind of recycle dyeing waste-water of the present invention comprises:
(1) dyeing waste-water that will contain inorganic salt injects water-and-oil separator, will be 1: 50～50: 1 organic solvent adding water-and-oil separator then with the dyeing waste-water volume ratio, stirs 1～15min, standing demix;
(2) lower floor's inorganic salt solution is isolated, used acid for adjusting pH value, get into dyeing process and utilize again; The mixing solutions of upper strata organic solvent, water and dyestuff is reclaimed organic solvent through solvent recovery machine.
Inorganic salt in the said step (1) are sodium sulfate, sodium-chlor, yellow soda ash, sodium hydrogencarbonate, Repone K, salt of wormwood or saleratus, and concentration is 10g/L～100g/L.
Organic solvent in the said step (1) is methylacetone, butanone, acetone, propyl alcohol or Virahol.
Dyeing waste-water in the said step (1) is reactive dyed wastewater, direct dyeing waste water, acid dyeing waste water, vat dyes dyeing waste-water or neutral dyeing waste water.
Acid in the said step (2) is hydrochloric acid, acetic acid or sulfuric acid, and concentration is 0.1～10mol/L.
Dyeing process in the said step (2) is reactive dyeing operation, acid dyeing operation, direct dyeing operation or chrome dye dyeing process.
Solvent recovery machine in the said step (2) is that methylacetone reclaims machine, butanone reclaims machine, acetone recovery machine, propyl alcohol recovery machine or isopropanol recovering machine.
The extraction of organic solvent organic synthesis with separate in obtained using very widely, lower boiling organic solvent applies to inorganic salt extractions, is beneficial to recycle and reuse.
The present invention utilize solvent lower boiling, easily separated with water, characteristics such as can reuse, the inorganic salt that the abstraction technique of organic solvent are used for dyeing waste water reclaim.Contain organic solvent phase after the extraction,, reclaim organic solvent, be used for extracting again through heating; The high density inorganic salt solution that reclaims can recycle in dyeing.This just can realize the recycle to dyeing waste-water middle and high concentration inorganic salt, but not directly as sewage discharge, is the Technology of an environment-friendly type.
Beneficial effect
(1) of the present invention with low cost, to equipment require lowly, and working method is simple;
(2) the present invention can realize inorganic salt recycle in the dyeing waste-water is applicable to the processing of various brine wastes, the environmental protection non-secondary pollution;
(3) colorful wastewater after desalination is handled among the present invention helps further decolored degradation;
(4) the present invention can reduce the printing and dyeing cost, economizes on resources, and brings very big value benefit.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in the restriction scope of the present invention.Should be understood that in addition those skilled in the art can do various changes or modification to the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment 1
1L REACTIVE Red 195 # dyeing waste-water (adding sodium sulfate concentration in the dyeing is 40g/L, and soda ash concentration is 20g/L) is joined water-and-oil separator, and adding then with the wastewater volume ratio is 1: 1 acetone, stirs 1min, layering.With lower floor's high density colourless inorganic salt brine solution separatory, subsequent use.Then the mixed solution that remains acetone, water and dyestuff in the separator is taken out, pour acetone into and reclaim machine, reclaim 56 ℃ of cuts and promptly get acetone, the rate of recovery is 95.5%.
Obtained the 91ml inorganic salt solution through detecting, to wherein adding the sulfuric acid that 51ml concentration is 1mol/L, regulating the pH value is 7.0, and oven dry obtains the 47.44g solid.
Embodiment 2
1L REACTIVE Red 195 # dyeing waste-water (adding sodium sulfate concentration in the dyeing is 30g/L, and soda ash concentration is 15g/L) is joined water-and-oil separator, and adding then with the wastewater volume ratio is 5: 1 Virahol, stirs 3min, layering.With lower floor's high density colourless inorganic salt brine solution separatory, subsequent use.Then the mixed solution that remains Virahol, water and dyestuff in the separator is taken out, pour the isopropanol recovering machine into, reclaim the azeotrope that 80 ℃ of cuts promptly get Virahol and water, the isopropanol recovering rate is 96.4%.
Obtained the 103ml inorganic salt solution through detecting, to wherein adding the sulfuric acid that 43ml concentration is 1mol/L, regulating pH value is 7.0, and oven dry obtains the 35.27g solid.
Embodiment 3
1L acid dyeing waste water (adding sodium sulfate concentration in the dyeing is 20g/L) is joined water-and-oil separator, and adding then with the wastewater volume ratio is 50: 1 methylacetone, stirs 10min, layering.With lower floor's high density colourless inorganic salt brine solution separatory, subsequent use.Then the mixed solution that remains methylacetone, water and dyestuff in the separator is taken out, pour methylacetone into and reclaim machine, reclaim 50～67 ℃ of cuts and promptly get methylacetone, the methylacetone rate of recovery is 92.3%.
Obtained the 33ml inorganic salt solution through detecting, its pH value is 5.6, and directly oven dry obtains the 16.57g solid.
Embodiment 4
1L direct dyeing waste water (adding sodium sulfate concentration in the dyeing is 20g/L) is joined water-and-oil separator, and adding then with the wastewater volume ratio is 1: 50 acetone, stirs 15min, layering.With lower floor's high density colourless inorganic salt brine solution separatory, subsequent use.Then the mixed solution that remains acetone, water and dyestuff in the separator is taken out, pour acetone into and reclaim machine, reclaim 56 ℃ of cuts and promptly get acetone, the acetone rate of recovery is 90.22%.
Obtained the 32ml inorganic salt solution through detecting, its pH value is 6.4, and directly oven dry obtains the 17.43g solid.
Claims (7)
1. the method for inorganic salt in the recycle dyeing waste-water comprises:
(1) dyeing waste-water that will contain inorganic salt injects water-and-oil separator, will be 1: 50～50: 1 organic solvent adding water-and-oil separator then with the dyeing waste-water volume ratio, stirs 1～15min, standing demix;
(2) lower floor's inorganic salt solution is isolated, used acid for adjusting pH value, get into dyeing process and utilize again; The mixing solutions of upper strata organic solvent, water and dyestuff is reclaimed organic solvent through solvent recovery machine.
2. the method for inorganic salt in a kind of recycle dyeing waste-water according to claim 1; It is characterized in that: the inorganic salt in the said step (1) are sodium sulfate, sodium-chlor, yellow soda ash, sodium hydrogencarbonate, Repone K, salt of wormwood or saleratus, and concentration is 10g/L～100g/L.
3. the method for inorganic salt in a kind of recycle dyeing waste-water according to claim 1, it is characterized in that: the organic solvent in the said step (1) is methylacetone, butanone, acetone, propyl alcohol or Virahol.
4. the method for inorganic salt in a kind of recycle dyeing waste-water according to claim 1 is characterized in that: the dyeing waste-water in the said step (1) is reactive dyed wastewater, direct dyeing waste water, acid dyeing waste water, vat dyes dyeing waste-water or neutral dyeing waste water.
5. the method for inorganic salt in a kind of recycle dyeing waste-water according to claim 1, it is characterized in that: the acid in the said step (2) is hydrochloric acid, acetic acid or sulfuric acid, concentration is 0.1～10mol/L.
6. the method for inorganic salt in a kind of recycle dyeing waste-water according to claim 1 is characterized in that: the dyeing process in the said step (2) is reactive dyeing operation, acid dyeing operation, direct dyeing operation or chrome dye dyeing process.
7. the method for inorganic salt in a kind of recycle dyeing waste-water according to claim 1 is characterized in that: the solvent recovery machine in the said step (2) is that methylacetone reclaims machine, butanone reclaims machine, acetone recovery machine, propyl alcohol recovery machine or isopropanol recovering machine.
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| CN2011101763232A CN102351268A (en) | 2011-06-28 | 2011-06-28 | Method of recycling inorganic salt in dyeing wastewater |
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| CN2011101763232A CN102351268A (en) | 2011-06-28 | 2011-06-28 | Method of recycling inorganic salt in dyeing wastewater |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102888766A (en) * | 2012-10-30 | 2013-01-23 | 东华大学 | Processing method for removing hydrolyzed reactive dyes on cotton knitted fabric by using solvent water system |
| CN104594078A (en) * | 2014-10-13 | 2015-05-06 | 广东溢达纺织有限公司 | Non-aqueous solvent composition with temperature control separation performance for reactive dyes |
| CN105002760A (en) * | 2015-06-02 | 2015-10-28 | 河海大学 | Method and device for recycling saline water in printing and dyeing process based on ozone decoloring |
| CN107235594A (en) * | 2017-07-05 | 2017-10-10 | 山东如意科技集团有限公司 | A kind of utilization process and system of reactive dyeing raffinate |
| CN107352677A (en) * | 2017-07-05 | 2017-11-17 | 山东如意科技集团有限公司 | The decoloration process and decolouring system of a kind of reactive dyeing raffinate |
| CN110597307A (en) * | 2019-09-20 | 2019-12-20 | 中山市普洛斯智能设备科技有限公司 | Solution concentration control device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102888766A (en) * | 2012-10-30 | 2013-01-23 | 东华大学 | Processing method for removing hydrolyzed reactive dyes on cotton knitted fabric by using solvent water system |
| CN104594078A (en) * | 2014-10-13 | 2015-05-06 | 广东溢达纺织有限公司 | Non-aqueous solvent composition with temperature control separation performance for reactive dyes |
| CN105002760A (en) * | 2015-06-02 | 2015-10-28 | 河海大学 | Method and device for recycling saline water in printing and dyeing process based on ozone decoloring |
| CN107235594A (en) * | 2017-07-05 | 2017-10-10 | 山东如意科技集团有限公司 | A kind of utilization process and system of reactive dyeing raffinate |
| CN107352677A (en) * | 2017-07-05 | 2017-11-17 | 山东如意科技集团有限公司 | The decoloration process and decolouring system of a kind of reactive dyeing raffinate |
| CN110597307A (en) * | 2019-09-20 | 2019-12-20 | 中山市普洛斯智能设备科技有限公司 | Solution concentration control device |
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Application publication date: 20120215 |