某印刷厂有机废气治理工程案例分析

Project case for treatment of volatile organic compounds in a printery factory

挥发性有机物(VOCs)具有来源广泛、成分复杂、不稳定的特点。因此,依据净化效率高、投资和运行成本低廉的原则,通过多种技术优化集成,可实现VOCs达标排放。介绍了VOCs治理技术的应用范围及优缺点。以上海某印刷厂为例,其主要废气成分为苯、甲苯、二甲苯,针对其含尘特点,设计了一套“喷淋洗涤吸收+紫外光解氧化+水相雾化吸收”组合工艺,经调试运行,该厂的有机废气处理后远低于上海市地方标准《印刷业大气污染物排放标准》(DB31/872—2015)中规定限值。

Volatile organic compounds (VOCs) have some characteristics,containing wide range of sources,complex composition,and unsteadiness.Therefore,in terms of the principle of high purification efficiency ,low investment and operating cost,VOCs can be emitted on standard through optimal integration of various technologies.The application scope,advantages and disadvantages of VOCs treatment technologies are introduced in the present study.Take a printery plant in Shanghai for example,an integrated process,containing “spray washing absorption,ultraviolet photolysis oxidation,and aqueous atomization absorption” was designed,specific to exhaust containing dust,benzene,toluene and xylene.After commissioning operation,the organic exhaust emission after treatment is far lower than the limits set in Shanghai local standard,i.e.standards for the emission of atmospheric pollutants in printing industry ( DB 31/872-2015 ).