Strong effective decoloring decontaminating purifying agent for wastewater of dyestuff, and preparation method

A dye wastewater and water purifying agent technology, applied in the direction of flocculation/sedimentation water/sewage treatment, textile industry wastewater treatment, etc., can solve the lack of research on product quality and the impact of wastewater treatment systems, difficulty in reaching recycling standards, and engineering recycling rates Low-cost problems, to achieve the effect of low treatment cost, easy operation and less sludge

Inactive Publication Date: 2007-10-10
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the iron salt in the recycled water is too high, it will often cause spots on the fiber cloth or the dyeing will not be bright
Physicochemical + biochemical treatment processes are commonly used in the treatment of printing and dyeing wastewater in China. The quality of the effluent basically meets the "Discharge Standards for Pollutants in the Textile Dyeing and Finishing Industry", but it is generally difficult to meet the recycling standards.
The recycling of printing and dyeing wastewater has not attracted enough attention. Most of the domestic research on the recycling of printing and dyeing wastewater is in the experimental stage, and there are few projects for practical application, and the projects that have been put into operation have the disadvantages of low recycling rate and high treatment cost. There is also a lack of research on the impact on product quality and wastewater treatment systems after long-term recycling

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A preparation method of powerful decolorization and decontamination water purifying agent for dye wastewater, which comprises the following steps: in a reaction kettle equipped with a stirrer and a constant temperature (volume less than 1200L), first add 250kg of melamine, 10kg of aluminum sulfate, and 100kg of ammonium chloride , 100kg of formaldehyde, after stirring and dissolving, control the reaction temperature at 70±1°C, and react at constant temperature for 1h; then add 100kg of urea, 100kg of ammonium chloride, and 100kg of formaldehyde, control the reaction temperature at 90±5°C, and react at constant temperature for 3h; 100kg of soluble starch aqueous solution with a concentration of 30%, and 50kg of cationic polyacrylamide aqueous solution with a mass concentration of 4%, react at a constant temperature of 70±5°C for 30 minutes for the third polymerization reaction, and cool to room temperature to prepare a dye wastewater Powerful decolorizing, decontaminating...

Embodiment 2

[0030] A preparation method of powerful decolorization and decontamination water purifying agent for dye wastewater, which comprises the following steps: in a reaction kettle equipped with a stirrer and a constant temperature (volume less than 1200L), first add 250kg of melamine, 10kg of aluminum sulfate, and 100kg of ammonium chloride , 100kg formaldehyde, after stirring and dissolving, control the reaction temperature at 69°C, and react at a constant temperature for 1 hour; then add 100kg of urea, 100kg of ammonium chloride, and 100kg of formaldehyde, control the reaction temperature at 85°C, and react at a constant temperature for 3 hours; then add a mass concentration of 20% 100kg of soluble starch aqueous solution, and 10kg of cationic polyacrylamide aqueous solution with a mass concentration of 1%, reacted at a constant temperature of 65°C for 30 minutes for the third polymerization reaction, and cooled to room temperature to prepare a powerful decolorization and decontami...

Embodiment 3

[0032] A preparation method of powerful decolorization and decontamination water purifying agent for dye wastewater, which comprises the following steps: in a reaction kettle equipped with a stirrer and a constant temperature (volume less than 1200L), first add 250kg of melamine, 10kg of aluminum sulfate, and 100kg of ammonium chloride , 100kg formaldehyde, after stirring and dissolving, control the reaction temperature at 71°C, and react at a constant temperature for 1 hour; then add 100kg of urea, 100kg of ammonium chloride, and 100kg of formaldehyde, control the reaction temperature at 95°C, and react at a constant temperature for 3 hours; then add a mass concentration of 60% 100kg of soluble starch aqueous solution, and 50kg of cationic polyacrylamide aqueous solution with a mass concentration of 6%, reacted at a constant temperature of 75°C for 30 minutes for the third polymerization reaction, and cooled to room temperature to prepare a powerful decolorization and decontami...

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Abstract

This invention relates to a method for preparing high-efficiency water purifier for decolorizing printing wastewater. The water purifier is polymerized from: melamine 2.5 parts, aluminum sulfate 0.1 part, ammonium chloride 2 parts, formaldehyde 2 parts, urea 1 part, 20-60 wt.% soluble starch aqueous solution 1 part, and 1-6 wt.% cationic polyacrylamide solution 0-0.5 part. The water purifier has good treatment effect on printing wastewater.

Description

technical field [0001] The invention belongs to the technical field of printing and dyeing wastewater treatment, and in particular relates to a powerful decolorizing, decontaminating and purifying agent for decolorizing printing and dyeing wastewater and a preparation method thereof. Background technique [0002] In recent years, with the development of chemical fiber fabrics, the rise of imitation silk and the progress of printing and dyeing finishing technology, while the variety of dyes is increasing, the function is also developing in the direction of anti-photolysis, anti-oxidation, and anti-biological oxidation. Make dye wastewater treatment more difficult. Wastewater containing water-soluble dyes, such as reactive dyes and acid dyes, is difficult to remove using current mature wastewater treatment processes. With the increasingly stringent discharge standards and rising water and sewage charges, companies are increasingly aware of environmental protection, printing a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F103/30
Inventor 夏世斌罗斌华
Owner WUHAN UNIV OF TECH
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