High-concentration printing ink waste liquid treatment and sludge dewatering integration method and high-concentration printing ink waste liquid treatment and sludge dewatering integration apparatus

Abstract

The present invention discloses a high-concentration printing ink waste liquid treatment and sludge dewatering integration method and a high-concentration printing ink waste liquid treatment and sludge dewatering integration apparatus. The apparatus comprises a printing ink waste liquid storage tank, a reaction curing dewatering device, a solid-liquid separation sieve and an acid storage tank, wherein a sewage pipe is arranged between the waste liquid storage tank and the reaction curing dewatering tank for connection and is provided with a sewage pump, a stirrer is arranged in the reaction curing dewatering tank, the motor of the stirrer adopts the stepless speed regulating, the lower portion of the stirring shaft is helical, an acid addition pipe is arranged between the acid storage tank and the reaction curing dewatering tank for connection and is provided with a valve, the bottom portion of the reaction curing dewatering tank is provided with a rapid opening valve, and the solid-liquid separation sieve is positioned just below the reaction curing dewatering tank. With the treatment method and the equipment of the present invention, the printing ink waste liquid pollutant removing and sludge dewatering integration is achieved, the waste liquid decolorization rate achieves more than or equal to 99%, the CODCr removal rate achieves more than or equal to 90%, the sludge moisture content is less than 60%, and the sludge is naturally dried without other dewatering equipment after being taken out.

Description

technical field [0001] The invention belongs to the technical field of sewage sludge treatment in environmental engineering, and in particular relates to an integrated method and device for high-concentration ink waste liquid treatment and sludge dehydration. 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 t...

AI Technical Summary

Problems solved by technology

Some operations are troublesome, with high energy consumption and low dehydration efficiency. After dehydration, the moisture content of the solid sludge is still high, the sludge structure is loose, and the volume is large, which is not conducive to transportation, storage and treatment.

And equipped with special sludge dewatering equipment, the investment is large

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