CN104193045A - Active turquoise blue dye production wastewater reclamation process - Google Patents
Active turquoise blue dye production wastewater reclamation process Download PDFInfo
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- CN104193045A CN104193045A CN201410330442.2A CN201410330442A CN104193045A CN 104193045 A CN104193045 A CN 104193045A CN 201410330442 A CN201410330442 A CN 201410330442A CN 104193045 A CN104193045 A CN 104193045A
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Abstract
The invention discloses an active turquoise blue dye production wastewater reclamation process, which comprises the following steps: (1) directly transferring dye wastewater which is no more than 50 times in chromaticity to a wastewater collection tank, feeding dye wastewater which is more than 50 times in chromaticity to a decolorizing pool, physically decolorizing the dye wastewater in the decolorizing pool, and transferring the processed dye wastewater into the wastewater collection tank once again; (2) adding the dye wastewater in the wastewater collection tank of the step (1) into a neutralization kettle, and slowly adding lime milk while stirring uniformly; and stopping reaction when pH value is 7.0-8.5; (3) filter-pressing through a filter press to obtain filtrate I and a filter cake I; (4) adding the obtained filtrate I to a replacement kettle, and adding sodium carbonate for a replacement reaction; and (5) filter-pressing materials in the replacement kettle of the step (4) through the press filter to obtain filtrate II and a filter cake II. The wastewater processed by the process can be completely reclaimed for production of active turquoise blue dye, thus realizing a goal of clean production in a dye production process.
Description
Technical field
The present invention relates to reactive turquoise blue waste water in dye production and recycle technique.
Background technology
In the synthetic production process of dyestuff, can produce a large amount of mother liquor waste waters and washes, because of its COD value and colourity higher, as not treated direct discharge, the destruction that can cause water ecological setting, serious environment pollution.At present, existing a lot of documents are reported the improvement technology of waste water in dye production, as adsorption decoloring method, catalytic oxidation, biochemical process, Fe-C Micro Electrolysis Method etc.These methods all obtain certain effect to the improvement of waste water from dyestuff, but waste water recovery not.The area that waste water reclamation is applied mechanically for water scarcity seems particularly important, yet there are no the report that relevant reactive turquoise blue waste water in dye production recovery reaches process water zero release.
Summary of the invention
The problem existing for solving above-mentioned prior art, the present invention proposes a kind of reactive turquoise blue waste water in dye production and recycles technique, waste water after this art breading can fully recovering in reactive turquoise blue DYE PRODUCTION, realized the green production target of cleaner production and the energy-saving and emission-reduction of DYE PRODUCTION process.
Technical scheme of the present invention is achieved in that
Reactive turquoise blue waste water in dye production is recycled a technique, comprises the following steps:
(1) waste water from dyestuff is processed respectively according to the difference of colourity, the waste water from dyestuff of colourity≤50 times directly enters wastewater collection tank, colourity >50 waste water from dyestuff doubly, enters decolouring pond and carries out physical decolorization processing, and after processing, waste water from dyestuff enters wastewater collection tank again;
By step (1) wastewater collection tank waste water from dyestuff add in neutralization reaction still, then slowly add milk of lime, stir while adding evenly, detect in real time the pH value in neutralization reaction still simultaneously, when pH value is 7.0～8.5, stop adding milk of lime;
By step (2) the material in neutralization reaction still adopt pressure filter to carry out press filtration, obtain filtrate I and filter cake I;
By step (3) gained filtrate I join in replacement reaction kettle, add sodium carbonate to carry out replacement(metathesis)reaction;
By step (4) the material in replacement reaction kettle adopt pressure filter to carry out press filtration, obtain filtrate II and filter cake II.
Further, the filtrate II reuse (5) of described step is to DYE PRODUCTION process, can be used as sulfonation operation bath water and condensation operation at the bottom of water use, certainly also can be used as ice making water and filter cake rinse water; Filter cake II reuse is carried out neutralization reaction to neutralization reaction still.
Further, in described decolouring pond, be provided with the molecular sieve that filter screen and main component are silicon-dioxide, described filter screen Mu Shuo≤200 order.
Further, (2) described step detects the pH value in neutralization reaction still in real time, when pH value is 7.5～8.5, stops adding milk of lime, is conducive to so follow-up replacement(metathesis)reaction.
Further, described step is (2) after waste water from dyestuff neutralization reaction, according to polyacrylamide with in and in still liquid mass ratio be 0.5～1:10
4ratio, in neutralization reaction still, add polyacrylamide solid, can accelerate like this speed of pressure filter press filtration.
Further, described replacement(metathesis)reaction adopts sodium carbonate to carry out, and the object of carrying out replacement(metathesis)reaction is that the existence of calcium salt in reactive turquoise blue dyestuff is larger to the salt tolerant alkalescence of dyestuff and solubleness Index Influence.
Waste water from dyestuff colourity of the present invention is measured and is drawn according to extension rate method, described extension rate method refers to get a certain amount of sewage sample and is placed in 100mL or 50mL colorimetric cylinder, till being repeatedly diluted to and just can't see color with distilled water, i.e. color the same as distilled water, the multiple of dilution water is the colourity of water sample, unit is that doubly the method is applicable to the contaminated surface water and industrial sewage color measurenent.
Beneficial effect of the present invention:
Reactive turquoise blue waste water in dye production recovery method of the present invention, the processing of first waste water from dyestuff being decoloured, can effectively avoid the post precipitation thing treatment step that need to decolour, and has saved program, and the waste water after decolouring is approaching with tap water, colourity≤50 times; After adopting lime slurry neutralization to process, the COD value of waste water, lower than 100mg/L, adopts lime slurry neutralization rather than neutralization with lime, is that the pH value after neutralization is more accurate because the pH of lime slurry neutralization reaction more easily controls; After neutralization, by pressure filter press filtration, obtain filtrate I and filter cake I, filter cake I main component is calcium sulfate, can be for adjusting the additive of cement index; Filtrate I is not directly discharged into sewage work, but through SPC-D replacement(metathesis)reaction, and carry out pressure filter press filtration and obtain filtrate II and filter cake II, filtrate II reuse is to DYE PRODUCTION process, filter cake II is that calcium carbonate reuse is carried out neutralization reaction to neutralization reaction still, has realized the complete-reclaiming of waste water and dregs.
Embodiment
Embodiment 1
The factory effluent of Qu Naiman Mingzhou Chemical Industry Science Co., Ltd reactive turquoise blue 21 carries out colorimetric detection, and colourity is 210 times, puts it into decolouring pond and carries out decolorization filtering.Decolouring pond comprises order number 200 object filter screens, and on filter screen, having main component is the molecular sieve of silicon-dioxide.Wastewater collection after decolouring is to wastewater collection tank, after collection, waste water in wastewater collection tank is joined in the neutralization reaction still of 10 tons, then slowly add milk of lime, stir while adding evenly, detect in real time the pH value in neutralization reaction still simultaneously, when pH value is 7.5, stop adding milk of lime.Then, adopt pressure filter to carry out press filtration the material in neutralization reaction still, obtain filtrate I and filter cake I, filter cake I is for adjusting the additive of cement index, and filtrate I joins replacement reaction kettle and sodium carbonate carries out replacement(metathesis)reaction; Then, adopt pressure filter to carry out press filtration the material in replacement reaction kettle, obtain filtrate II and filter cake II, filter cake II can reuse carry out neutralization reaction to neutralization reaction still, filtrate II naked eyes look the same with tap water, and colourity is 40 times after testing, and COD value is 90mg/L.Filtrate II is all for reactive turquoise blue 21 production processes, and products obtained therefrom solubleness reaches 155 grams per liters, and Salt And Alkali Tolerance index reaches 16 minutes, reaches the production standard of reactive turquoise blue dyestuff 21 completely.
Embodiment 2
The factory effluent of Qu Naiman Mingzhou Chemical Industry Science Co., Ltd reactive turquoise blue 14 carries out colorimetric detection, colourity is 40 times, collected wastewater collection tank, after collection, the waste water in wastewater collection tank is joined in the neutralization reaction still of 10 tons, then slowly add milk of lime, stir while adding evenly, detect in real time the pH value in neutralization reaction still simultaneously, when pH value is 7.0, stop adding milk of lime.Then, to add in neutralization reaction still according to polyacrylamide with in and in still liquid mass than being 0.5:10
4ratio add polyacrylamide solid; Then, adopt pressure filter to carry out press filtration, obtain filtrate I and filter cake I, filter cake I is for adjusting the additive of cement index, and filtrate I joins replacement reaction kettle and sodium carbonate carries out replacement(metathesis)reaction; Then, adopt pressure filter to carry out press filtration the material in replacement reaction kettle, obtain filtrate II and filter cake II, filter cake II can reuse carry out neutralization reaction to neutralization reaction still, filtrate II naked eyes look the same with tap water, and colourity is 40 times after testing, and COD value is 100mg/L.Filtrate II is all for reactive turquoise blue 14 production processes, and products obtained therefrom solubleness reaches 150 grams per liters, reaches the production standard of reactive turquoise blue dyestuff 14 completely.
Embodiment 3
The factory effluent of Qu Naiman Mingzhou Chemical Industry Science Co., Ltd reactive turquoise blue 72 carries out colorimetric detection, and colourity is 160 times, puts it into decolouring pond and carries out decolorization filtering.Decolouring pond comprises order number 300 object filter screens, and on filter screen, having main component is the molecular sieve of silicon-dioxide.Wastewater collection after decolouring is to wastewater collection tank, after collection, waste water in wastewater collection tank is joined in the neutralization reaction still of 10 tons, then slowly add milk of lime, stir while adding evenly, detect in real time the pH value in neutralization reaction still simultaneously, when pH value is 8.0, stop adding milk of lime.Then, to add in neutralization reaction still according to polyacrylamide with in and in still liquid mass than being 1:10
4ratio add polyacrylamide solid; Then, adopt pressure filter to carry out press filtration, obtain filtrate I and filter cake I, filter cake I is for adjusting the additive of cement index, and filtrate I joins replacement reaction kettle and sodium carbonate carries out replacement(metathesis)reaction; Then, adopt pressure filter to carry out press filtration the material in replacement reaction kettle, obtain filtrate II and filter cake II, filter cake II can reuse carry out neutralization reaction to neutralization reaction still, filtrate II naked eyes look the same with tap water, and colourity is 30 times after testing, and COD value is 85mg/L.Filtrate II is all for reactive turquoise blue 72 production processes, and products obtained therefrom solubleness reaches 165 grams per liters, reaches the production standard of reactive turquoise blue dyestuff 72 completely.
Embodiment 4
The factory effluent of Qu Naiman Mingzhou Chemical Industry Science Co., Ltd reactive turquoise blue 21 carries out colorimetric detection, colourity is 40 times, collected wastewater collection tank, after collection, the waste water in wastewater collection tank is joined in the neutralization reaction still of 10 tons, then slowly add milk of lime, stir while adding evenly, detect in real time the pH value in neutralization reaction still simultaneously, when pH value is 8.5, stop adding milk of lime.Then, to add in neutralization reaction still according to polyacrylamide with in and in still liquid mass than being 0.8:10
4ratio add polyacrylamide solid; Then, adopt pressure filter to carry out press filtration, obtain filtrate I and filter cake I, filter cake I is for adjusting the additive of cement index, and filtrate I joins replacement reaction kettle and sodium carbonate carries out replacement(metathesis)reaction; Then, adopt pressure filter to carry out press filtration the material in replacement reaction kettle, obtain filtrate II and filter cake II, filter cake II can reuse carry out neutralization reaction to neutralization reaction still, filtrate II naked eyes look the same with tap water, and colourity is 40 times after testing, and COD value is 80mg/L.Filtrate II is all for reactive turquoise blue 21 production processes, and products obtained therefrom solubleness reaches 155 grams per liters, and Salt And Alkali Tolerance index reaches 16 minutes, reaches the production standard of reactive turquoise blue dyestuff 21 completely.
Claims (5)
1. reactive turquoise blue waste water in dye production is recycled a technique, it is characterized in that, comprises the following steps:
(1) waste water from dyestuff is processed respectively according to the difference of colourity, the waste water from dyestuff of colourity≤50 times directly enters wastewater collection tank, colourity >50 waste water from dyestuff doubly, enters decolouring pond and carries out physical decolorization processing, and after processing, waste water from dyestuff enters wastewater collection tank again;
By step (1) wastewater collection tank waste water from dyestuff add in neutralization reaction still, then slowly add milk of lime, stir while adding evenly, detect in real time the pH value in neutralization reaction still simultaneously, when pH value is 7.0～8.5, stop adding milk of lime;
By step (2) the material in neutralization reaction still adopt pressure filter to carry out press filtration, obtain filtrate I and filter cake I;
By step (3) gained filtrate I join in replacement reaction kettle, add sodium carbonate to carry out replacement(metathesis)reaction;
By step (4) the material in replacement reaction kettle adopt pressure filter to carry out press filtration, obtain filtrate II and filter cake II.
2. waste water reclamation according to claim 1 utilizes technique, it is characterized in that, the filtrate II reuse (5) of described step is to DYE PRODUCTION process, and filter cake II reuse is carried out neutralization reaction to neutralization reaction still.
3. waste water reclamation according to claim 1 and 2 utilizes technique, it is characterized in that, is provided with the molecular sieve that filter screen and main component are silicon-dioxide in described decolouring pond, described filter screen Mu Shuo≤200 order.
4. waste water reclamation according to claim 1 and 2 utilizes technique, it is characterized in that, (2) described step detects the pH value in neutralization reaction still in real time, when pH value is 7.5～8.5, stops adding milk of lime.
5. waste water reclamation according to claim 1 and 2 utilizes technique, it is characterized in that, described step is (2) after waste water from dyestuff neutralization reaction, according to polyacrylamide with in and in still liquid mass than being the ratio of 0.5～1:104, in neutralization reaction still, add polyacrylamide solid.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104674570A (en) * | 2015-02-13 | 2015-06-03 | 绍兴文理学院 | Recycling dyeing method of dyeing wastewater of reactive dyes |
| CN105836921B (en) * | 2016-05-04 | 2019-06-25 | 浙江闰土研究院有限公司 | A kind of processing method of dye wash waste water |
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Cited By (2)
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| CN105836921B (en) * | 2016-05-04 | 2019-06-25 | 浙江闰土研究院有限公司 | A kind of processing method of dye wash waste water |
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Effective date of registration: 20180713 Address after: 063611 Hebei Tangshan City harbor development area, Zhongshan Avenue, north of Sinoma road. Patentee after: Tangshan minzhou science and Technology Co., Ltd. Address before: 028306 Tongliao City, the Inner Mongolia Autonomous Region, Naiman Banner, Da qinla town south suburb Chemical District Patentee before: NAIMAN MINGZHOU CHEMICAL TECHNOLOGY CO., LTD. |
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