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A cationic dye dyeing wastewater decolorizer and its preparation and use method

A technology for cationic dyes and wastewater dyeing, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve secondary pollution and other problems, achieve the same effect, realize resource utilization, and eliminate sludge secondary pollution The effect of secondary pollution problems

Active Publication Date: 2019-11-19
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mud cake formed after mechanical filtration or centrifugal dehydration is usually landfilled as solid waste, which is likely to cause secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A cationic dye dyeing wastewater decolorizer, mainly composed of 70 parts by mass of black water-based ink printing waste liquid extraction sludge, 20 parts of pumice particles and 10 parts of calcium ore powder, the preparation method is: the black water-based ink The acid analysis sludge of printing waste liquid was adjusted into a slurry with a solid content of 10%, and alkaline substances were added to neutralize it to neutrality; 28% by mass of pumice particles and 14% of calcium ore powder were added to the sludge (with Sludge dry weight meter) Stir evenly to adjust the specific gravity of the sludge; while stirring, heat the sludge to 80°C for dehydration, so that the sludge forms a block, and the water is discharged; the block sludge is hot-pressed until the water content is low Dry at 50%; heat the sludge to 550°C for 2 hours without air; break the sludge into granules after falling to a certain temperature, spray a wetting agent solution with a mass concentrati...

Embodiment 2

[0016] A cationic dye dyeing wastewater decolorizer, mainly composed of 75 parts by mass of black water-based ink printing waste liquid extraction sludge, 20 parts of pumice particles and 5 parts of calcium ore powder, the preparation method is: the black water-based ink Acid analysis sludge of printing waste liquid was adjusted into a slurry with a solid content of 10%, and alkaline substances were added to neutralize it to neutrality; pumice particles with a mass percentage of 26.5% and calcium ore powder with a mass percentage of 6.7% (based on Sludge dry weight meter) Stir evenly to adjust the specific gravity of the sludge; while stirring, heat the sludge to 75°C for dehydration, so that the sludge forms a block, and the water is discharged; the block sludge is hot-pressed until the water content is low Dry at 50%; heat the sludge to 500°C for 2 hours without air; break the sludge into granules after falling to a certain temperature, spray a wetting agent solution with a m...

Embodiment 3

[0020] A cationic dye dyeing wastewater decolorizer, mainly composed of 80 parts by mass of black water-based ink printing waste liquid extraction sludge, 15 parts of pumice particles and 5 parts of calcium ore powder, the preparation method is: the black water-based ink The acid-analysis sludge of printing waste liquid was adjusted into a slurry with a solid content of 10%, and alkaline substances were added to neutralize it to neutrality; pumice particles with a mass percentage of 18.8% and calcium ore powder with a mass percentage of 6.2% were added to the sludge. Sludge dry weight meter) Stir evenly to adjust the specific gravity of the sludge; while stirring, heat the sludge to 80°C for dehydration, so that the sludge forms a block, and the water is discharged; the block sludge is hot-pressed until the water content is low Dry at 50%; heat the sludge to 550°C for 1.5 hours without air; break the sludge into granules after falling to a certain temperature, spray a wetting a...

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Abstract

The invention discloses a cationic dye dyeing wastewater decoloring agent as well as a preparation method and a use method thereof. The cationic dye dyeing wastewater decoloring agent is mainly prepared from black water-based ink printing waste liquid extracted sludge, pumice particles and calcium mineral powder, and the preparation method comprises the following steps: blending the black water-based ink printing waste liquid extracted sludge into a pulp state with a certain solid content, and adding an alkaline substance to neutralize the sludge to be neutral; adding a certain amount of the pumice particles and the calcium mineral powder into the sludge, and stirring uniformly; heating the sludge to 50-90 DEG C while stirring, and performing dehydration to enable the sludge to be blocky; squeezing and drying the blocky sludge; isolating the sludge from the air, heating to 350-750 DEG C, and keeping the temperature for 1-5h; cooling the sludge to a certain temperature, then crushing the sludge into particles, spraying a wetting agent solution, and then mixing uniformly; and adding a decoloring agent into cationic dye dyeing wastewater, stirring for 10-180min, performing filtration or air floatation to separate decoloring agent particles, and recovering the decoloring agent particles for recycling. With use of the prepared decoloring agent, the decoloring rate of the cationic dye dyeing wastewater is close to 100%, and the cationic dye dyeing wastewater can be reused.

Description

technical field [0001] The invention belongs to the technical field of environmental protection engineering, and in particular relates to a cationic dye dyeing wastewater decolorizer and a preparation and use method thereof. Background technique [0002] Cationic dyes are mainly used for acrylic dyeing and printing. The dye matrix is ​​positively charged and can generate Coulomb attraction with fibers. The dyeing percentage is high and it is widely used. However, its water solubility is good and it is resistant to oxidation-reduction reactions. Therefore, cationic dye dyeing wastewater is difficult to decolorize. In actual production, chemical coagulation, adsorption or ion exchange methods are often used for treatment. [0003] Water-based ink is widely used in various fields because of its health, environmental protection and safety characteristics. At present, a large number of plastic packaging materials are increasingly using water-based inks in printing and printing, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/00C02F1/28
CPCC02F1/00C02F1/281C02F2101/308
Inventor 柳荣展张宾邹译慧潘颖于梦楠石宝龙
Owner QINGDAO UNIV
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