汕头市印刷行业废气中挥发性有机物污染特征及防治对策

Pollution Characteristics and Countermeasures of Volatile Organic Compound in Exhaust Gas of Printing Industry in Shantou

本文采用了热脱附–气相色谱法测定了汕头市部分典型印刷企业废气中的挥发性有机物(VOCs)的产生、排放浓度,从原辅料、生产工艺、处理方式等角度剖析了汕头市印刷行业挥发性有机物的污染现状及特点,结果表明:汕头市印刷行业主要使用环保型原料,其中使用DJC无苯油墨产生VOCs浓度最低,平均为28.7 mg/m3;平版印刷方式较凹版印刷产生的VOCs浓度更低,平均分别为106 mg/m3和204 mg/m3;近半企业采用活性炭吸附或者UV光解 + 活性炭吸附的组合技术作为治理技术,但采用RTO炉焚烧技术处理效率最高,达95%以上。建议选用环保型原辅料、加强过程控制并针对废气特点采用适宜治理技术来系统解决印刷业VOCs污染防控问题。

In this paper, Thermal desorption-Gas chromatography method was used to determine the concentration of volatile organic compound in the exhaust gas of some typical printing enterprises in Shantou. The pollution status and characteristics of the printing industry in Shantou were analyzed from the aspects of raw materials, production technology and treatment methods. The results show that the printing industry in Shantou mainly uses environment-friendly raw materials, and the concentration of VOCs produced by using DJC non-benzene ink is the lowest, averaging 28.7 mg/m3. The concentration of VOCs produced by lithographic printing is lower than that produced by gravure printing. The average is 106 mg/m3 and 204 mg/m3 respectively, and nearly half of the enterprises adopt the combination technology of activated Carbon adsorption or UV photolysis + activated carbon adsorption as treatment technology, but RTO furnace incineration technology has the highest treatment efficiency, above 95%. It is suggested that the pollution control of VOCs in printing industry should be systematically solved by using environment-friendly raw and auxiliary materials, strengthening process control and adopting suitable treatment technology according to the characteristics of exhaust gas.