走航技术在石化企业VOCs排放监测中的应用

APPLICATION OF MOBILE MORNITORING TECHNOLOGY IN DETERMINING VOCs EMISSION IN PETROCHEMICAL PLANTS

石化企业是典型的挥发性有机化合物(VOCs)排放源,排放特征总体表现为源头多、分布广、波动大、无组织排放占比高,因而监测和管控难度较大。采用搭载快速响应光谱分析仪的监测车在石化企业厂区走航监测烷烃、烯烃及苯系物等代表性VOCs组分的浓度及分布,发现烷烃污染在全厂区域均有分布,其中6个生产装置及10个储罐区域存在持续性烷烃排放,烯烃与苯系物污染分布只限于少数区域。走航监测能显著提升监测的时效性和空间覆盖度,可明确石化企业不同生产装置和储罐区域的VOCs排放特征和污染水平,为后续VOCs治理及在线监测体系的建设与优化提供可靠的数据支撑。

Petrochemical plants are typical emissions sources of volatile organic compounds(VOCs),with the characteristics of multiple sources,wide distribution,large fluctuations,and a high proportion of fugitive emissions,making the monitoring and control difficult.A monitoring vehicle equipped with rapid response spectrometer was used to monitor the concentration and distribution of representative VOCs components,such as alkanes,olefins,and aromatics in the petrochemical plant.It was found that alkane pollution existed in all areas of the plant,due to continuous alkane emissions from 6 units and 10 storage tank areas.The distribution of olefin and aromatics pollution existed in a few areas.The mobile monitoring technology can be used to significantly improve the timeliness and spatial coverage,clarify the VOCs emission characteristics and pollution levels of different production facilities and storage tank areas in petrochemical plants,and provide reliable data support for subsequent VOCs control and the construction and optimization of online monitoring systems.