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Integrated treatment process and device for printing and dyeing wastewater

A technology for printing and dyeing wastewater and treatment process, which is applied in the field of water treatment and can solve the problems of low biodegradability, high salt content, and difficulty in biochemical treatment of wastewater.

Active Publication Date: 2018-12-25
广州雅居乐固体废物处理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the above synthesis process, after salting out and separation, a large amount of waste water containing salt, sulfonic acid dyes, unreacted dibromopropionyl chloride and 2,4-diaminobenzenesulfonic acid will be produced, which can be biochemically Low, high salt content, difficult to be treated by biochemical methods, therefore, there is an urgent need to propose a process for efficiently treating the above wastewater

Method used

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  • Integrated treatment process and device for printing and dyeing wastewater
  • Integrated treatment process and device for printing and dyeing wastewater
  • Integrated treatment process and device for printing and dyeing wastewater

Examples

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Embodiment 1

[0038] Step 1, filtering the printing and dyeing wastewater with a 50nm microfiltration membrane to remove the unremoved precipitated dye;

[0039] Step 2: Mix the filtrate of the microfiltration with the extractant n-hexane according to the volume ratio of 0.5:1 for extraction, the temperature of the extraction process is 20°C, and the extraction time is 30 minutes;

[0040]Step 3, the raffinate obtained in step 2 is treated with sulfonated polyethersulfone modified attapulgite microsphere adsorbent, the hydraulic retention time of the adsorption process is 50min, and the adsorption temperature is 30°C; the preparation method of the adsorbent Yes: S1, soak attapulgite in 2mol / L hydrochloric acid for 80 minutes, filter it, wash it with deionized water, and then roast it at 180°C for 1 hour to obtain acid-activated attapulgite; S2, In parts by weight, disperse 3 parts of acid-activated attapulgite and 1 part of cetyltrimethylammonium bromide in 100 parts of 40vol.% ethanol aque...

Embodiment 2

[0045] Step 1, filtering the printing and dyeing wastewater with a 500nm microfiltration membrane to remove the unremoved precipitated dye;

[0046] Step 2: Mix the filtrate from the microfiltration with the extractant n-hexane at a volume ratio of 1:1 for extraction. The temperature of the extraction process is 30°C, and the extraction time is 40 minutes;

[0047] Step 3, the raffinate obtained in step 2 is treated with sulfonated polyethersulfone modified attapulgite microsphere adsorbent, the hydraulic retention time of the adsorption process is 50min, and the adsorption temperature is 30°C; the preparation method of the adsorbent Yes: S1, immerse attapulgite in 4mol / L hydrochloric acid for 100min activation treatment, filter out, wash with deionized water, and then roast at 190°C for 2h to obtain acid-activated attapulgite; S2, In parts by weight, 5 parts of acid-activated attapulgite and 3 parts of cetyltrimethylammonium bromide were dispersed in 100 parts of 50vol.% etha...

Embodiment 3

[0052] Step 1, filtering the printing and dyeing wastewater with a 200nm microfiltration membrane to remove the unremoved precipitated dye;

[0053] Step 2: Mix the filtrate from the microfiltration with the extraction agent n-hexane according to the volume ratio of 0.8:1, and perform extraction. The temperature of the extraction process is 25°C, and the extraction time is 30 minutes;

[0054] Step 3, the raffinate obtained in step 2 is treated with sulfonated polyethersulfone modified attapulgite microsphere adsorbent, the hydraulic retention time of the adsorption process is 50min, and the adsorption temperature is 30°C; the preparation method of the adsorbent Yes: S1, immerse attapulgite in 3mol / L hydrochloric acid for 90min activation treatment, filter out, wash with deionized water, and then roast at 185°C for 1.5h to obtain acid-activated attapulgite; S2 , in parts by weight, disperse 4 parts of acid-activated attapulgite and 2 parts of cetyltrimethylammonium bromide in ...

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Abstract

The invention relates to an integrated treatment process and device for printing and dyeing wastewater and belongs to the technical field of water treatment. The integrated treatment process includesthe steps firstly, filtering the printing and dyeing wastewater with a microfiltration membrane to remove separate-out dye which is not removed; secondly, mixing filtrate obtained by the microfiltration with an extraction agent to perform extraction; thirdly, subjecting raffinate obtained in the second step to adsorption treatment; fourthly, sequentially subjecting wastewater obtained after the third step to ferric-carbon micro-electrolysis and Fenton oxidation treatment; fifthly, filtering the wastewater obtained after the fourth step with a nanofiltration membrane, and returning the nanofiltration membrane concentrate to the third step for treatment; sixthly, sequentially subjecting nanofiltration membrane permeate to reverse osmosis membrane concentration, evaporation and concentrationand drying to obtain industrial NaCl. The treatment process can effectively treat acyl chloride printing and dyeing wastewater.

Description

technical field [0001] The invention relates to an integrated treatment process and device for printing and dyeing wastewater, and more specifically relates to a treatment technology for reactive dye wastewater containing acid chloride compounds, which belongs to the technical field of water treatment. Background technique [0002] With the development of the dye industry, its production wastewater has become one of the main sources of water pollution. At present, there are tens of thousands of dyes. They not only have specific colors, but also have complex structures. Most of them are polymer complexes. The structure is difficult to be broken, the biodegradability is low, and most of them are potentially toxic. The dye industry is also a high-energy-consuming and high-pollution industry. According to estimates, about 10% to 20% of dyes are released into water during production and use. Based on the total dye production in 2010, there will be 75,600 to 151,200 tons of dyes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C01D3/04C02F103/36
CPCC01D3/06C02F1/04C02F1/26C02F1/28C02F1/441C02F1/442C02F1/444C02F1/46176C02F1/722C02F9/00C02F2101/308C02F2101/34C02F2101/36C02F2101/38C02F2101/40C02F2103/30C02F2305/026
Inventor 毛强平
Owner 广州雅居乐固体废物处理有限公司