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A method for joint treatment of ink waste liquid and metal pickling waste liquid

A combined treatment and metal acid technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve problems such as difficult dehydration, achieve simple method, high dehydration efficiency, and structural dense effect

Inactive Publication Date: 2017-01-25
WUJIANG HANTA TEXTILE FINISHING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional treatment method mostly adopts the neutralization method, and the sludge formed contains a large amount of metal salts, which makes dehydration difficult

Method used

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  • A method for joint treatment of ink waste liquid and metal pickling waste liquid

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Experimental program
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Effect test

Embodiment 1

[0018] Embodiment 1 refers to figure 1

[0019] The invention provides a method for joint treatment of ink waste liquid and metal pickling waste liquid and its sludge dehydration. The water-based ink waste liquid is used for the flocculation, chelation and inorganic acid of metal ions in the metal pickling waste liquid. The role of the analysis makes the organic pollutants in the waste liquid change from hydrophilic to hydrophobic, and then the pollutants in the oily ink waste liquid are separated out under the condition of acidic aqueous solution and combined to wrap the water-based ink flocs, so that the pollution in the waste liquid Mutual coagulation, shrinkage, solidification and dehydration to form massive sludge, realizing the common removal of organic pollutants and metal ions. The massive sludge formed by shrinkage and aggregation has a compact structure, no other sludge dewatering equipment is needed, and the integration of waste liquid treatment and sludge dehydrat...

Embodiment 2

[0031] The black mixed water-based ink waste liquid in the water-based ink waste liquid storage tank 1 is pumped into the reaction curing dehydration tank 5 with the sewage pump 3 .

[0032] Add inorganic acid to the mixed water-based ink waste liquid in the reaction curing dehydration tank 5, and start the mixer 8 to stir the reaction at the same time, and adjust the pH value of the waste liquid to 1-2.

[0033] Pump the red oily ink waste liquid into the reaction curing dehydration tank 5 with the sewage pump 4, and keep stirring, so that the pollutants shrink and gather and dehydrate. After the lumpy sludge is formed, the supernatant liquid is discharged and the lumpy pollutants are taken out.

[0034] The invention provides a method for combined treatment of water-based ink waste liquid and oily ink waste liquid and sludge dehydration thereof, which mainly includes the following steps:

[0035] Step a. Mix black water-based ink waste (COD Cr : 400,000 mg / L; chromaticity:...

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Abstract

The present invention discloses a printing ink waste liquid and metal acid washing waste liquid combination treatment and sludge dewatering method, which is characterized by comprising: respectively collecting an aqueous printing ink waste liquid and an oily printing ink waste liquid, pouring a metal acid washing waste liquid to the aqueous printing ink waste liquid, stirring for 3-10 min, adjusting the pH value of the mixed waste liquid to 1-2, adding the oily printing ink waste liquid to the mixed waste liquid, stirring for 5-60 min after completing the adding, precipitating pollutants, carrying out curing dewatering to form massive sludge, discharging the supernatant, taking out the massive sludge, and naturally drying. With the treatment method of the present invention, the efficient organic pollutant and metal ion removal and sludge dewatering integrations in the printing ink waste liquid and the metal acid washing waste liquid are concurrently achieved, wherein the pollutant removal rate achieves more than or equal to 90%, the decolorization rate achieves more than or equal to 99%, the treatment cost is low, the sludge curing dewatering structure is compact, and the moisture content is less than 60%.

Description

technical field [0001] The invention belongs to the technical field of sewage sludge treatment in environmental engineering, and particularly relates to a method for combined treatment of printing ink waste liquid and metal pickling waste liquid. Background technique [0002] Plastic packaging (waterproof) materials use water-based inks and oil-based inks according to product needs during printing. When changing printing colors, it is necessary to clean the printing machine and ink storage tank, resulting in a certain amount of ink waste. The ink waste liquid contains a large amount of organic pollutants such as pigments, polymer resins and organic solvents, and the pollution is extremely serious (the chroma is more than 30,000 times, the COD Cr The value is as high as 200,000-600,000 mg / L), which is difficult to handle. [0003] For the treatment of this kind of waste liquid, the coagulation method is usually used for treatment, that is, a coagulant is added to the waste l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F11/12
Inventor 张宾柳荣展张晓东于德爽张妍青翟世民
Owner WUJIANG HANTA TEXTILE FINISHING
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