挥发性有机废气“绿岛”项目工程实例

郴州市某汽车集团整合旗下周边“4S”店的钣喷业务,建设集中钣喷中心挥发性有机废气(VOCs)“绿岛”项目,实现了污染物共享管理。“钣金—刷腻子打磨—喷烤漆”工序产生的VOCs废气采用“干式过滤+活性炭吸附+原位脱附+催化燃烧”工艺处理。“大风量、低浓度、低温度”有机混合气体采用蜂窝活性炭吸附净化处理,浓缩废气采用热空气脱附进行催化燃烧处理。生产实践表明,该系统运行稳定,VOCs(非甲烷总烃计)有组织排放浓度在10~11 mg/m^(3),符合湖南省地方标准DB 43/1356—2017《表面涂装(汽车制造及维修)挥发性有机物、镍排放标准》排放要求。

Chenzhou Automotive Group has integrated the sheet metal and painting businesses of its surrounding 4S dealers to build a centralized sheet metal and painting center VOCs(volatile organic compounds)"green island"project,achieving shared management of pollutants.The VOCs exhaust gas produced by the processes of"sheet metal-painting-sanding-baking paint"is treated by the technology of"dry filtration+activated carbon adsorption+in-situ desorption+catalytic combustion".The organic mixed gas with the characteristics of"large volume,low concentration,low temperature"is treated by activated carbon adsorption purification,and the concentrated exhaust gas is treated by catalytic combustion with hot air desorption.Production practice shows that the system runs stably,and the organized emission concentration of volatile organic compounds(non-methane hydrocarbon)is 10-1l mg/m^(3),which meets the emission requirements of Hunan local standard"Surface Coating(Automotive Manufacturing and Maintenance)Volatile Organic Compounds and Nickel Emission Standard"(DB 43/1356-2017).