Composite flocculation medicine powder for wastewater treatment of flexography ink and application of medicine powder

Abstract

The invention relates to a composite flocculation medicine powder for wastewater treatment of flexography ink. The composite flocculation medicine powder is prepared by mixing, by weight, 0.5% of polyacrylamide, 10% of iron salt, 30% of aluminum salt, 9.5% of chitosan, 30% of dolomite powder and 20% of clay. The polyacrylamide is any one of cationic polyacrylamide or anionic polyacrylamide or nonionic polyacrylamide; the iron salt is any one of ferric chloride or ferrous sulfate or polyferric sulfate; the aluminum salt is any one of poly aluminium chloride or aluminium sulfate; the chitosan comprises any one of chitosan and a derivative thereof; the clay is any one of kaolin or organobentonite. According to the composite flocculation medicine powder, a flocculation technology is changed, and traditional three-time or four-time medicine addition is changed into one-time medicine addition, so that the whole wastewater treatment device and process are simplified; the medicine powder has aspecific physicochemical function and also has good polymerization precipitation and surface absorption functions, a function of removing COD in wastewater and a decoloration function.

Description

technical field [0001] The invention relates to a wastewater treatment technology, in particular to a composite flocculation powder used for flexographic printing ink wastewater treatment, and belongs to the technical field of printing wastewater treatment or environmental protection. Background technique [0002] Flexographic printing adopts ink technology, and because of its considerable environmental protection features, it has become the development direction of green printing. But it still has wastewater treatment problems throughout the printing process. In order to solve the treatment of various wastewater in the printing process, the current flexographic printing ink treatment still uses the method of adding various flocculation agents to the wastewater multiple times to achieve flocculation treatment of the wastewater. [0003] attached Figure 4 A schematic diagram of wastewater flocculation treatment by adding three to four liquid chemicals is given. [0004] In...

AI Technical Summary

Problems solved by technology

However, this method of adding inorganic flocculants and organic flocculants in batches has certain limitations in removing pollutants in wastewater, and the amount of flocculant input and the ingredients of chemicals cannot effectively correspond to the water quality changes in wastewater. Poor flocculation effect

[0006] In addition, due to the need to frequently change the printing pattern process during the flexographic printing process, and equipment cleaning will also cause complex chemical composition changes caused by the doping of different ink colors, which not only causes changes in the composition of wastewater, but also makes it impossible to reach wastewater. The effect of effective treatment

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