Air circulating system of multicolor press

Abstract

The invention discloses an air circulating system of a multicolor press. The air circulating system comprises n printing color groups, and n is larger than or equal to 2; the printing color groups comprise air inlets and exhaust holes; the exhaust holes of at least one printing color group communicate with a main exhaust pipe through exhaust valves; the exhaust holes of at least one printing colorgroup communicate with a main air return pipe through air return valves; the exhaust holes of the printing color groups at least communicate with the main exhaust pipe or the main air return pipe; the air inlets of the printing color groups communicate with the main air return pipe; and an outlet of the main exhaust pipe communicates with an exhaust gas treatment device. According to the air circulating system of the multicolor press, multi-color printing exhaust gas of which the exhaust air rate is low and the VOCs content is high can be acquired, exhaust gas of one or more full-page printing color groups can be directly discharged, exhaust gas of one or more non-full page printing color groups enters the main air return pipe to be circulated, exhaust gas treatment efficiency is improved, and exhaust gas treatment cost in multi-color printing is reduced.

Description

technical field [0001] The invention relates to energy saving and emission reduction of multi-color printing, in particular to an air circulation system of a multi-color printing machine, in particular to an air circulation system of a multi-color printing machine for decorative materials. Background technique [0002] Multi-color printing is widely used in industrial production. For example, PVC floors, building walls and furniture surface decoration materials all use multi-color printing. Multi-color printing is to apply ink on the printed body and then dry it. So far, solvent-based Ink, that is, ink containing VOCs (volatile organic compounds, that is, volatile organic compounds), ink containing VOCs will produce a large amount of gas containing VOCs during the drying process. Since VOCs are emitted into the atmosphere, they will chemically react with nitrogen oxides (NOx) in the air under sunlight to produce PM2.5 and harmful ozone, which is the smog that is of particula...

AI Technical Summary

Problems solved by technology

The air circulation system of the existing packaging material printing machine cannot meet the requirements of multi-color printing of decorative gravure materials

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