CN1156409C - Treatment method of textile printing industry effluent - Google Patents
Treatment method of textile printing industry effluent Download PDFInfo
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- CN1156409C CN1156409C CNB011308915A CN01130891A CN1156409C CN 1156409 C CN1156409 C CN 1156409C CN B011308915 A CNB011308915 A CN B011308915A CN 01130891 A CN01130891 A CN 01130891A CN 1156409 C CN1156409 C CN 1156409C
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- waste water
- woven fabrics
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Abstract
The present invention relates to a method for treating waste water of textile printing and dyeing industry. The present invention is characterized in that a physicochemical method is used mainly, various dyes of printing and dyeing waste water are removed respectively by an alkali system, an acidic system, an oxidative system, a redox system, a flocculating system and an adsorption system, treated water is colorless, tasteless and transparent, and the combination of partial treatment units can be adopted according to the requirements of discharge grades. The combinations of treatment units are different according to the diversity of the quality, the amount and the kind of dyes. A chromaticity removal rate is larger than or equal to 98%, and the removal rate of sulphide is larger than or equal to 99%. The technique has the advantages of no mass residue and recycle of flocculating agents, and the present invention is suitable for various kinds of printing and dyeing waste water using dyes mainly.
Description
Technical field
The invention belongs to process for treating industrial waste water, particularly the improvement method of wastewater in textile printing and dyeing industry.
Background technology
The composition of printing and dyeing industrial waste water, character and colourity are different with textile properties, and also the variation with employed dyestuff kind, quantity and other chemical agent changes.Be generally that the water yield is big, colourity is high, alkalescence or acid strong or the like, generally based on Organic pollutants, wherein many materials are poisonous and harmful, directly do not enter the severe contamination that farmland or water body all can cause environment if do not handle.
Domestic and international at present improvement to printing and dyeing industrial waste water, the method that mainly adopts biochemical process, physico-chemical process, biochemical process and physico-chemical process to combine.Number of patent application is 97104496.1 invention, discloses a kind of treatment of dyeing and printing method and filter plant, is finished by coarse filtration, catalyzed oxidation flocculation and three processing units of millipore filtration.Dyeing waste water is entered the filtration that the remodeling strainer tube is housed in the tank body intercept and capture device, particle diameter is intercepted and captured at particle and suspended substance more than 5 microns, and form filter cake with filteration; Then in filtrate, add flocculant poly ferric sulfate, oxygenant and coagulant aids, make it the catalyzed oxidation flocculation.Entering millipore filter again filters.Application number is that the method for 99120641 a kind of pair of filtering layer filter bed treatment of dyeing and printing adopts A layer iron charcoal layer, and the two-layer filtering layer of B layer calcium hydroxide layer handled dyeing waste water.
Summary of the invention
Now the technology of report all is various dyestuff to be done as a whole, takes all factors into consideration its treatment process, and owing to different with textile properties of composition, character and the colourity of printing and dyeing industrial waste water, the result that obtains is widely different like this.
The present invention is that to overcome above-mentioned shortcoming be to handle respectively by the character of dyestuff, thereby solves the colourity of various dyeing waste waters and sulfide etc.
The present invention realizes with following method:
The present invention is according to the nature difference of dyestuff, use different steps respectively, pass through cascade filtration, from waste water, remove various relevant dyestuffs: be characterized in based on physico-chemical process, dyeing waste water respectively by alkaline system, acidic system, oxidation system, redox system, flocculation system and adsorption system, is removed various dyestuffs respectively.Waste water is transferred to slight alkalinity, remove dispersed dye and sour fuel, again under solutions of weak acidity, remove basic dyestuff and thioxine dyes etc., again under the strong oxidizer effect, remove the water-soluble reactive colour and the cationic dyestuff of easy oxidation, under the redox condition of iron filings, remove organism such as azoic dyestuff; The relevant dyestuff of under flocculating conditions, removing milkiness attitude, water-soluble attitude and easily being adsorbed by flocculation; Last again by the adsorption of slag, remove organism such as alkyl chloride, hydro carbons or the like.
Concrete steps of the present invention are as follows:
Remove acid dyestuff and dispersed dye etc.;
2. in the acidifying aeration tank, regulating waste water with acid is about 3 to PH, and aeration filtered through non-woven fabrics again more than half an hour, removed most of sulfide and basic dyestuff, if colourity is up to standard, can discharge after the neutralization;
3. as having water-soluble reactive colour and cationic dyestuff etc., waste water may be below standard, water is entered oxidation tank, add strong oxidizer, as clorox etc., aeration is placed more than 4-12 hour at oxidation pond more than half an hour then, filter through non-woven fabrics, remove multiple as soluble dye and sulfide such as reactive dyestuffs.At this moment, but water outlet qualified discharge.
4. if still below standard, then enter the redox jar that iron filings are housed, regulating PH with sulfuric acid is about 4, and aeration filtered through non-woven fabrics more than half an hour, further removed the above-mentioned azoic dyestuff that does not eliminate as yet etc., if see that colourity is up to standard, can discharge.
5. if above-mentioned water outlet is still below standard, then enters the flocculation jar and enter the flocculation stage, water outlet is filtered through non-woven fabrics, filters the back water outlet and gets final product qualified discharge;
6. also can be with waste water again through slag absorption, water outlet is after non-woven fabrics filters, and is colourless, tasteless, as clear as crystal, but complete qualified discharge.
In above processing step, 1 is that alkaline system processing unit, 2 is that acidic system processing unit, 3 oxidation systems are that processing unit, 4 is that redox system processing unit, 5 is that flocculation system processing unit, 6 is the adsorption system processing unit.The visual water quality of processing unit, dye species and quantity and increase and decrease and make up, unitary order is not a fixed, can design arbitrarily as required.
The combination of technique unit increases and decreases with kind, quantity and the character of dyestuff, but, general dyestuff: routine basic dyestuff, sour fuel, dispersed dye, reactive dyestuffs, neutral dye, vat dyes, cationic dyestuff or the like, after the improvement of this technology, sulfide, colourity etc. all can reach emission standard.The CDO clearance reaches 50～70%.
The water outlet of each processing unit all needs to filter with a kind of cotton non-woven fabrics that blending becomes with man-made fiber, and man-made fiber can be nylon, polypropylene fibre etc., and facility investment is reduced greatly, makes very difficult filtering floss be able to sharp separation.
The dyestuff of collecting on the non-woven fabrics burns through washing to mix in the coal after concentrating, and non-woven fabrics can repeatedly use again repeatedly; Because of separating through multiple times of filtration, the dyestuff of staying in the last flocculation residue is few again, make inorganic flocculating agent recovery, recycle become feasible, thereby accomplish not have a large amount of residues dischargings, non-secondary pollution problem.
The add-on of oxygenant also becomes with the kind and the quantity of dyestuff.
The sorbing material of using in the adsorption system can be gac, slag etc., and particle diameter is generally 1-1.5mm, the coal dust that the above boiler tornado dust collector of also available 40 orders come out etc.
Iron filings in the redox jar can be pig scraps, also can be wrought iron bits, but need add 1/10th slag etc. when consider with wrought iron, and particle diameter is more preferably greater than 2mm during the usefulness pig scrap, otherwise air-flow is difficult for passing through during aeration, influences reaction effect.
The flocculation residue reaches about 8% with concentrated sulfuric acid dissolution to body iron content after drying.PH is 2～3 promptly
The flocculation residue reaches about 8% with concentrated sulfuric acid dissolution to body iron content after drying.PH 2～3 promptly can be recycled.
Waste water before handling: colourity 500～1000 extension rates are blackish green, dark red, blackyellow or the like;
S
=Be 5～10mg/L; SS is 200～500mg/L;
Handle the back water outlet: colourity≤80 extension rates or as clear as crystal, colorless and odorless;
S
=≤ 1mg/L or do not detect; SS≤70mg/L;
It is colourless, tasteless, as clear as crystal that water after the processing can reach, and also can only adopt the unitary combination of partially disposed to get final product according to the requirement of blow off levels.Dye property, quantity, kind difference, the combination of processing unit be difference to some extent also.Chroma removal rate 〉=98%, the clearance of sulfide 〉=99%, this technology does not have a large amount of residues, and flocculation agent recycles, and the present invention is applicable to various dyeing waste waters based on dyestuff.
Description of drawings
Fig. 1: process flow sheet
Specific embodiment
Embodiment 1:
Hangu District a certain printing and dyeing workshop in Tianjin has 40 dyeing machines, 300～500 tons of day water displacement.When 40 dyeing machines start simultaneously, cut the dyestuff composition, character of use, when quantity has nothing in common with each other, waste water is apparent to be dark red, blackyellow, blackish green or the like, then its comprehensive discharge dyeing waste water uses six unitary all treating processess of 1～6: waste water is flowed into water collecting basin, transferring to PH with our factory's salkali waste is about 8, filter the about 1M of net cage volume through the non-woven fabrics net cage
3, then waste water is squeezed into the acidifying aeration tank with pump, the about 20M in aeration tank
3, it is 3 that adding sulfuric acid transfers to PH, aeration absorbed the hydrogen sulfide of emitting with 40% isoconcentration alkali lye more than 30 minutes, squeezed into the non-woven fabrics net cage with pump and filtered the about 1M of net cage volume
3, enter oxidation pond again, the about 20M of oxidation pond
3, adding volume ratio is 0.1～0.2% sodium hypochlorite solution, and it is about 3.5 that adding sulfuric acid transfers to PH, and aeration pumped into 140M more than 30 minutes
3Oxidation is deposited the pond and was placed about 12 hours, filters through nonwoven fabric filter.Water outlet pumps into 20M
3The redox jar, the iron plane flower of 1/3 volume is housed, with 1: 1 H in jar
2SO
4Transferring to PH is about 4, and aeration is more than 30 minutes, and water outlet enters the flocculation jar after nonwoven fabric filter filters, add ferric sulfate to 20～50mg/L, transferring to PH with the waste lye of this factory again is 8, and aeration agitation is even, adds 0.05% polyacrylamide solution immediately, the volume ratio of add-on is 0.1%, aeration stirs evenly the pump of promptly stopping the supple of gas or steam, and static about 20～30 minutes, water outlet was filtered through nonwoven fabric filter, through slag absorption, get final product qualified discharge again.
Waste water before handling: colourity 500～1000 extension rates, S
=Be 5～10mg/L,
SS is 200～500mg/L;
Handle the back water outlet: colourity≤80 extension rates, S
=≤ 2mg/L,
SS≤70mg/L。
Embodiment 2:
When the dyestuff that uses had basic dyestuff, thioxine dyes and dispersed dye, at this moment to be suspension black be main to the dyeing waste water of this factory's workshop discharge outlet, and treatment process is selected 1,2 unit combinations for use.Dyeing waste water is flowed into water collecting basin, and transferring to PH with the waste lye of our factory is about 8, filters the about 1M of net cage volume through the non-woven fabrics net cage
3, then waste water is squeezed into the acidifying aeration tank with pump, the about 20M in aeration tank
3, adding sulfuric acid, to transfer to PH be 3, aeration is more than 30 minutes, absorb the hydrogen sulfide of emitting with 40% isocyatic caustic soda after, squeeze into the filtration of non-woven fabrics net cage strainer with pump, it is 6～7 that water outlet slightly is neutralized to PH with alkali lye, gets final product qualified discharge.
Waste water before handling: colourity 500～1000 extension rates, S
=Be 5～10mg/L,
SS is 200～500mg/L;
Handle the back water outlet: colourity≤80 extension rates, S
=≤ 2mg/L,
SS≤70mg/L。
Embodiment 3:
When the dyestuff that uses during as dyestuffs such as solubility reactive dyestuffs or positively charged ions, at this moment the dyeing waste water of this factory's workshop discharge outlet is bright-coloured large red, and is transparent, colourity up to 2000 extension rates about, no sulfide is discharged and is put.Can adopt the 3rd, 6 unit combinations.This dyeing waste water is squeezed into oxidation pond, the about 20M of oxidation pond
3, adding volume ratio is 0.1～0.2% sodium hypochlorite solution, and it is about 3.5 that adding sulfuric acid transfers to PH, and aeration pumped into 140M more than 30 minutes
3Oxidation is deposited the pond and was placed about 12 hours, filters through nonwoven fabric filter, and it is 6～7 that water outlet is neutralized to PH with alkaline solution, after slag absorption, gets final product qualified discharge.
Waste water before handling: colourity 200～2000 extension rates, SS are 200～500mg/L;
Handle the back water outlet: colourity≤80 extension rates, SS≤70mg/L.
Claims (6)
1. the improvement method of a wastewater in textile printing and dyeing industry, concrete steps of the present invention are as follows successively in order:
(1) dyeing waste water being regulated pH value at equalizing tank with alkali is 8-9, filters through nonwoven fabric filter, removes matching stain and dispersed dye;
(2) in the acidifying aeration tank, regulating waste water with acid is 3 to PH, and aeration filtered through non-woven fabrics again more than half an hour, removed most of sulfide and basic dyestuff, if colourity is up to standard, can discharge after the neutralization;
(3) as having water-soluble reactive colour and cationic dyestuff, waste water may be below standard, water is entered oxidation tank, add strong oxidizer, clorox, aeration is more than half an hour, placed 4-12 hour at oxidation pond then, filter, remove multiple soluble dye and sulfide through non-woven fabrics, at this moment, but water outlet qualified discharge;
(4) if still below standard, then enter the redox jar that iron filings are housed, regulating PH with sulfuric acid is 4, and aeration filtered through non-woven fabrics more than half an hour, further removed the above-mentioned azoic dyestuff that does not eliminate as yet, if see that colourity is up to standard, can discharge;
(5) if above-mentioned water outlet is still below standard, then enter the flocculation jar and enter the flocculation stage, water outlet is filtered through non-woven fabrics, filters the back water outlet and gets final product qualified discharge;
(6) also can be with waste water again through slag absorption, water outlet is filtered through non-woven fabrics, and is colourless, tasteless, as clear as crystal, but complete qualified discharge;
In six above process steps, each step respectively is a processing unit.
2. the improvement method of a wastewater in textile printing and dyeing industry, concrete steps are as follows successively in order:
(1) dyeing waste water being regulated pH value at equalizing tank with alkali is 8-9, filters through nonwoven fabric filter, removes matching stain and dispersed dye;
(2) in the acidifying aeration tank, regulating waste water with acid is 3 to PH, and aeration filtered through non-woven fabrics again more than half an hour, removed most of sulfide and basic dyestuff, if colourity is up to standard, can discharge after the neutralization.
3. the improvement method of a wastewater in textile printing and dyeing industry, concrete steps are as follows successively in order:
(1) in the presence of water-soluble reactive colour and cationic dyestuff, water is entered oxidation tank, add strong oxidizer, clorox, aeration was placed 4-12 hour at oxidation pond more than half an hour then, filtered through non-woven fabrics, remove multiple soluble dye and sulfide, at this moment, but water outlet qualified discharge;
(2) also can be with waste water again through slag absorption, water outlet is filtered through non-woven fabrics, and is colourless, tasteless, as clear as crystal, but complete qualified discharge.
4. improvement method as claim 1,2 or 3 described wastewater in textile printing and dyeing industry, the water outlet that it is characterized in that each processing unit all needs to filter with a kind of cotton non-woven fabrics that blending becomes with man-made fiber, man-made fiber is nylon, polypropylene fibre, facility investment is reduced greatly, make very difficult filtering floss be able to sharp separation.
5. the improvement method of a wastewater in textile printing and dyeing industry as claimed in claim 4 is characterized in that the sorbing material of using in the adsorption system is gac, slag, and particle diameter is 1-1.5mm, or the coal dust that comes out with the above boiler tornado dust collector of 40 orders.
6. the improvement method of a wastewater in textile printing and dyeing industry as claimed in claim 1, it is characterized in that the iron filings in the redox jar are pig scrap or wrought iron bits, need add 1/10th slag when considering to be worth doing with wrought iron, particle diameter is greater than 2mm during with pig scrap, otherwise air-flow is difficult for passing through during aeration, influences reaction effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011308915A CN1156409C (en) | 2001-08-31 | 2001-08-31 | Treatment method of textile printing industry effluent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011308915A CN1156409C (en) | 2001-08-31 | 2001-08-31 | Treatment method of textile printing industry effluent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1335274A CN1335274A (en) | 2002-02-13 |
| CN1156409C true CN1156409C (en) | 2004-07-07 |
Family
ID=4670217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011308915A Expired - Fee Related CN1156409C (en) | 2001-08-31 | 2001-08-31 | Treatment method of textile printing industry effluent |
Country Status (1)
| Country | Link |
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Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1296296C (en) * | 2004-08-03 | 2007-01-24 | 李双民 | Textile printing and dyeing waste water processing system and method |
| CN101412571B (en) * | 2007-10-17 | 2011-06-01 | 上虞市金冠化工有限公司 | Technique for reclaiming waste water of azoic dye production |
| CN101962218B (en) * | 2010-09-27 | 2011-11-09 | 浙江大学 | Method for degrading azo dyes waste water |
| CN102050535B (en) * | 2010-11-10 | 2012-02-29 | 浙江大学 | Processing method for resource recovery of acidic dye waste water |
| CN102826673B (en) * | 2011-06-15 | 2016-01-06 | 浙江龙盛集团股份有限公司 | A kind of cleaning method of dyestuffs industries acid waste water |
| CN102557298A (en) * | 2012-01-06 | 2012-07-11 | 绍兴文理学院 | Method for decoloring printing and dyeing waste water of reactive dye |
| CN102774995A (en) * | 2012-07-24 | 2012-11-14 | 吴江市聚力机械有限公司 | Dyeing wastewater treatment device |
| CN103149184A (en) * | 2013-02-04 | 2013-06-12 | 山西大学 | Fluorescence detection method for hypochlorite |
| CN103964600B (en) * | 2013-02-05 | 2016-08-17 | 浙江龙盛集团股份有限公司 | A kind of recoverying and utilizing method of azo dispersion dyes waste water |
| CN104071920B (en) * | 2014-08-07 | 2015-10-28 | 南通润启时装有限公司 | Printing-dyeing waste water treatment process |
| CN105692952B (en) * | 2016-01-22 | 2018-06-01 | 南通海陵环境检测有限公司 | The processing method of textile waste |
| CN105948318B (en) * | 2016-06-08 | 2019-06-11 | 浙江奇彩环境科技股份有限公司 | A kind of recycling processing method of cationic dye wastewater |
| CN108751495A (en) * | 2018-06-11 | 2018-11-06 | 河南新野纺织股份有限公司 | A kind of wastewater in textile printing and dyeing industry processing method |
| CN109368861A (en) * | 2018-11-20 | 2019-02-22 | 韩涛 | A kind of textile printing and dyeing sewage-treatment plant |
| CN109384333A (en) * | 2018-11-20 | 2019-02-26 | 韩涛 | A kind of textile printing and dyeing sewage treatment process |
| CN109665547A (en) * | 2019-02-28 | 2019-04-23 | 仲恺农业工程学院 | A kind of method that sodium sulfate crystal is precipitated in induction high-salt wastewater |
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2001
- 2001-08-31 CN CNB011308915A patent/CN1156409C/en not_active Expired - Fee Related
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| CN1335274A (en) | 2002-02-13 |
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Granted publication date: 20040707 Termination date: 20110831 |