Printing ink drying and exhaust gas treatment system

Abstract

The invention discloses a printing ink drying and exhaust gas treatment system. The printing ink drying and exhaust gas treatment system is applied to a printing drying tunnel, and comprises a dehumidifying unit and a catalytic combustion unit; an outlet of the dehumidifying unit communicates with an air inlet of the printing drying tunnel; an air exhaust port of the printing drying tunnel communicates with an air inlet of the catalytic combustion unit; the dehumidifying unit comprises a dehumidifying device and a heat exchanger; an inlet of the dehumidifying device communicates with the outside; the outlet of the dehumidifying device communicates with a first inlet of the heat exchanger; a first outlet of the heat exchanger communicates with the outlet of the dehumidifying unit; the catalytic combustion unit comprises a catalytic bed; and air entering the air inlet of the catalytic combustion unit passes through the catalytic bed, a second inlet of the heat exchanger, and a second outlet of the heat exchanger sequentially, and communicates with the outside. According to the printing ink drying and exhaust gas treatment system, dry air provided by the dehumidifying unit can increase the water consumption of a diluent, reduce the amount of alcohol usage, and save costs; heat generated by the exhaust gas treatment system is used for drying, so that the energy consumption for drying is reduced, and the exhaust pollution is reduced.

Description

technical field [0001] The invention relates to the technical field of printing energy saving and environmental protection, in particular to a printing ink drying and waste gas treatment system, especially a water-based ink drying and waste gas treatment system in gravure printing. Background technique [0002] Gravure printing is to make the entire surface of the printing plate be covered with ink, and then use a special scraping mechanism to remove the ink in the blank part, so that the ink only stays in the cells of the graphic part, and then under the action of greater pressure , transfer the ink to the surface of the substrate to obtain printed matter. Traditional gravure printing usually uses solvent-based inks. Solvent-based inks contain ethyl acetate, isopropanol, n-propyl acetate, butyl acetate and other volatile organic compounds (VOCs for short). In addition, solvent-based oils In the process of use, it is also necessary to add a certain amount of VOCs to dilute ...

AI Technical Summary

Problems solved by technology

[0006] (2) The drying speed must be fast

[0008] In view of the current situation of water-based ink printing, it is an urgent need for those skilled in the art to develop a low-cost dehumidification and drying system that can increase the drying speed of water-based inks, and at the same time solve the problem of alcohol pollution in the drying waste gas of water-based inks, and make it a resource. technical problem

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