Sewage treatment system for printing plant

Abstract

The invention discloses a sewage treatment system for a printing plant. The sewage treatment system comprises a distillation retort, wherein the bottom part of the distillation retort is provided with an electric heater; a de-foaming agent storage pot is communicated with the distillation retort; one end of a condensing pipe is connected with the top end of the distillation retort, and the other end of the condensing pipe is connected with an oil-water separator; the condensing pipe is provided with cooling equipment; the oil-water separator is communicated with a sand filter and an anaerobic hydrolysis pond sequentially. The sewage treatment system is reasonable in design; through treating the sewage of the printing plant by the distilling method, a printing ink detergent is removed from the waste solution, and then the toxic impurities such as ammonia and chlorine are effectively filtered out from the sewage by the filter sands; the filter effect is good, the sewage after being treated can be recycled as industrial water, the operation cost of the sewage treatment system is low, and the purpose of saving the water resource can be realized.

Description

technical field [0001] The invention relates to a sewage treatment system, in particular to a sewage treatment system used in printing workshops. Background technique [0002] The printing unit of the gravure printing machine includes a standard type and a top pressure cylinder type printing unit, the former consists of a printing plate cylinder and an impression cylinder. Among them, the printing plate cylinder is cylindrical, and the surface is plated with copper as the plate material, and then through engraving or photo-etching, concave graphics and texts are formed on the surface of the cylinder. The printing plate cylinder of the gravure printing machine is directly immersed in the ink tank, and the ink under high-speed operation quickly fills the printing plate cylinder, and then the ink on the blank part of the printing plate surface is scraped off by the scraper, leaving the graphic groove Part of the ink is transferred to paper or other substrates by rolling the im...

AI Technical Summary

Problems solved by technology

Therefore, in the offset printing process, the use of ink cleaners is necessary and frequent. Every time the ink on the printing seat is cleaned, sewage will be produced. The components of the sewage include ink cleaners, water, ink, paper powder, paper wool and minerals, etc., and the color It is the color of ink. This kind of sewage is toxic and has a great impact on the environment. If it is not treated or handled improperly, it will cause serious pollution to the environment.

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