Packaging and printing workshop mainly produces all kinds of plastic film printing products. In the production process, a large number of color inks or organic diluents will be used. Printing ink and waste gas include benzene, toluene, xylene and ethyl acetate. If these VOC organic waste gases are directly discharged without treatment, it will affect the surrounding environment and people nearby.

印刷车间的废气需要先收集，再引入废气处理设备进行处理。印刷车间废气处理设备种类繁多，有催化燃烧、活性炭吸附、光氧化废气净化、等离子体净化和生物净化等。印刷一般分为：丝网印刷、凹版印刷、凸版印刷、制版印刷等。

The waste gas of printing workshop needs to be collected first, and then introduced into the waste gas treatment equipment for treatment. There are many kinds of waste gas treatment equipment in printing workshop, such as catalytic combustion, activated carbon adsorption, photo oxidation waste gas purification, plasma purification and biological purification. Printing is generally divided into: screen printing, gravure printing, relief printing, plate making printing, etc.

印刷产生的空气污染物主要是印刷过程中产生的油墨废气和清洗油墨用汽油挥发的气体。溶剂型油墨（含50%-60%挥发性成分）和稀释剂，挥发性成分的比例为70%-80%。挥发性有机物的组分通常是苯、甲苯、二甲苯、丙酮、丁酮、脂质、醚和气溶胶。

The air pollutants produced by printing are mainly the ink exhaust gas produced in the printing process and the gas volatilized by gasoline used to clean the ink. Solvent based ink (containing 50% - 60% volatile components) and diluent, the proportion of volatile components is 70% - 80%. The components of VOCs are benzene, toluene, xylene, acetone, butanone, lipid, ether and aerosol.

光氧化设备在印刷车间废气处理中的应用

Application of photooxidation equipment in waste gas treatment of printing workshop

印刷车间废气多为有机废气，气量大，浓度低。针对这种废气的常绿，建议先收集废气，然后将其引入UV光氧化废气净化设备中。高臭氧紫外线光束分解空气中的氧分子，产生游离氧，即活性氧。

The waste gas of printing workshop is mostly organic waste gas with large volume and low concentration. In view of the evergreen environmental protection of this kind of waste gas, it is suggested to collect the waste gas first, and then introduce it into the UV photo oxidation waste gas purification equipment. High ozone ultraviolet beam decomposes oxygen molecules in the air and produces free oxygen, namely active oxygen.

因为自由氧携带的正负电子是不平衡的，所以需要将其与它们结合产生臭氧的氧气分离。之后，臭氧发生器产生足够的氧离子来氧化废气，使废气产生二氧化碳和水，然后通过15米烟囱排出。

Because the positive and negative electrons carried by free oxygen are unbalanced, it is necessary to separate them from the oxygen that produces ozone. After that, the ozonator generates enough oxygen ions to oxidize the waste gas to produce carbon dioxide and water, which are then discharged through a 15 meter chimney.

对于上述印刷车间废气处理工艺，仅对其中一种进行了说明。你需要根据你的印刷设备，溶剂和墨水的成分来制定相应的方案。

For the above waste gas treatment process of printing workshop, only one of them is described. You need to develop solutions based on your printing equipment, solvent and ink composition.