走航监测在大连市化工园区VOCs污染特征分析中的应用

Application of Navigation Monitoring in the Analysis of VOCs Pollution Characteristics in Dalian Chemical Industry Park

大连是我国东北最大的国家级化工基地,化工园区VOCs治理是大连市大气治理的关键因素。笔者利用双通道VOCs走航监测设备对大连市某省级化工园区进行走航监测,研究其VOCs污染特征。结果表明:该化工园区中VOCs整体浓度范围在125~250μg/m^(3)的区域占多数,主要监测到24种VOCs组分,涵盖芳香烃、OVOCs、烷烃、卤代烃、烯烃等物种大类。识别到9个VOCs排放异常点位,涉及石油化工、医药等行业。该化工园区内三甲苯臭氧生成贡献最高,其次为甲苯、二甲苯。

Dalian is the largest national chemical base in Northeast China,and VOCs management in chemical industry park is a key factor in Dalian s air management.The author used dual-channel VOCs mobile monitoring system to conduct walk-around monitoring of a provincial-level chemical park in Dalian to study its VOCs pollution characteristics.The results showed that most of the VOCs concentrations in the chemical park ranged from 125 to 250μg/m^(3),and 24 VOCs components were mainly detected,including aromatic hydrocarbons,OVOCs,alkanes,halogenated hydrocarbons,olefin and other species.Nine VOCs emission anomaly points were identified,involving petrochemical,pharmaceutical and other industries.In the chemical industry park,the ozone generation contribution of tritoluene is the highest,followed by toluene and xylene.