电子产品加工制造企业挥发性有机物(VOCs)排放特征  

Characteristics of Volatile Organic Compounds( VOCs ) Emission from Electronic Products Processing and Manufacturing Factory

作　　者：崔如[1] 马永亮[1] 

机构地区：[1]清华大学环境学院国家环境保护大气复合污染来源与控制重点实验室,北京100084

出　　处：《环境科学》2013年第12期4585-4591,共7页Environmental Science

基　　金：国家重点基础研究发展规划(973)项目(2010CB951803)

摘　　要：根据美国EPA挥发性有机物标准检测法TO-11及TO-14／15，采用VOCs快速检测仪、Summa罐及DNPH吸附管，对我国某大型电子产品加工制造企业中不同工艺环节生产车间内部及生产线最终废气排放管道中VOCs含量水平及组分特征进行检测．结果表明，该企业涉及VOCs排放工艺中压铸车间总挥发性有机物（TVOCs）浓度为0．1—0．5mg·m^-3、机加工车间TVOCs浓度为1．5～2．5mg·m^-3、喷涂车间中TVOCs浓度为20～200mg·m^-3，各车间VOCs组分主要包括烷类、烯炔类、芳香类、酮类、酯类和醚类，共20余种．其中涂装车间内苯系物及酮类物质为主要VOCs组分，各物质浓度分别为苯0．02～0．34mg·m^-3、甲苯0．24～3．35mg·m^-3、乙苯0．04—1．33mg·m^-3、对二甲苯0．13—0．96mg·m^-3、邻／间二甲苯0．02～1．18mg·m^-3、丙酮0．29～15．77mg·m^-3、2-丁酮0．06—22．88mg·m^-3、环己酮0．02～25．79mg·m^-3、甲基异丁基甲酮0～21．29mg·m^-3．根据该企业生产特征及工艺数据计算，其单条生产线VOCs年排放量为14t，整个厂区年排放量约为840t．结合生产流程及生产工艺分析，喷涂过程中的溶剂使用是电子产品加工制造企业的VOCs主要排放来源，废气排放口是重点排放点．Based on the EPA method TO-11 and 14/15 for measurement of toxic organics in air samples, fast VOCs detector, Summa canister and DNPH absorbent were used to determine the VOCs concentrations and the compositions in the ambient air of the workshops for different processes as well as the emission concentration in the exhaust gas. In all processes that involved VOCs release, concentrations of total VOCs in the workshops were 0. 1-0. 5 mg·m^-3, 1.5-2.5 mg·m^-3 and 20-200 mg·m^-3 for casting, cutting and painting respectively. Main compositions of VOCs in those workshops were alkanes, eneynes, aromatics, ketones, esters and ethers, totally over 20 different species. The main compositions in painting workshop were aromatics and ketones, among which the concentration of benzene was 0. 02-0. 34 mg·m^-3, toluene was 0. 24-3.35 mg·m^-3 , ethyl benzene was 0. 04-1.33 mg·m^-3 , p-xylene was0. 13-0.96 mg·m^-3, m-xylene was 0.02-1.18 mg·m^-3 , acetone was 0.29-15.77 mg·m^-3 , 2-butanone was 0.06-22.88 -3 mg·m^-3, cyelohexene was 0.02-25.79mg·m^-3, and methyl isobutyl ketone was 0-21.29 rag.m-3. The VOCs emission from painting process was about 14 t·a-1 for one single manufacturing line, and 840 t.a-1 for the whole factory. According to the work flows and product processes, the solvent used during painting process was the main source of VOCs emission, and the exhaust gas was the main emission point.

关 键 词：电子产品 加工制造 挥发性有机物 涂装 排放特征 

分 类 号：X511[环境科学与工程—环境工程]