Device for discharging and treating volatile organic compound of printing machine

Abstract

The invention discloses a device for discharging and treating a volatile organic compound of a printing machine. The device comprises a gas collecting device, an adsorption device, a desorption fan, a catalytic cracking device and a discharging device, wherein the gas collecting device is connected with the printing machine; the adsorption device is connected with the gas collecting device; the adsorption device comprises a first exhaust pipeline, a second exhaust pipeline and a zeolite molecular sieve arranged in the first exhaust pipeline and the second exhaust pipeline; the first exhaust pipeline is connected with the desorption fan; the second exhaust pipeline is connected with the discharging device; the desorption fan is connected with the catalytic cracking device and is cooperated with the second exhaust pipeline for introducing the desorbed gas into the catalytic cracking device; the catalytic cracking device is connected with the discharging device; the discharging device is communicated with the external environment and is used for exhausting the treated gas. The device provided by the invention can fully absorb the VOCs gas discharged from the printing machine and discharge the qualified gas.

Description

technical field [0001] The invention relates to the technical field of emission treatment devices, in particular to a volatile organic compound emission treatment device for printing machines. Background technique [0002] In recent years, with the development of industry and the improvement of people's consumption level, the production of VOCs (volatile organic compounds, volatile organic compounds) has risen sharply, becoming one of the important culprits of PM2. big threat. Among them, packaging and printing is a key industry for VOCs governance. [0003] At present, the most widely used technologies in the treatment process of volatile organic compounds include activated carbon adsorption and desorption, zeolite rotor pyrolysis after concentration, incinerator direct pyrolysis, ultraviolet photocatalytic oxidation and other methods. However, these methods have their own defects, such as activated carbon is not resistant to humidity and high temperature (it can only be ...

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Problems solved by technology

However, these methods have their own defects, such as activated carbon is not resistant to humidity and high temperature (it can only be desorbed below 120°C), it ages very quickly, and produces a large amount of solid waste every year; Residues, and need to consume energy to heat and desorb VOCs all the time; direct treatment of low-concentration and large-volume VOCs waste gas by incinerators will consume a lot of natural gas; the treatment efficiency of ultraviolet photocatalysis and plasma is low (about 50%), etc.

Obviously, the emission treatment devices based on the above-mentioned existing processes cannot meet the treatment requirements of volatile organic compounds

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