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首页> 外文会议>Fourth International Conference on Air Pollution Monitoring, Simulation and Control, Aug 28-30, 1996, Toulouse, France >Measurement of the contribution of a single plant to air pollution using the SF6-tracer technique
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Measurement of the contribution of a single plant to air pollution using the SF6-tracer technique

机译：使用SF6-示踪技术测量单个工厂对空气污染的贡献

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摘要

Many regional and local monitoring networks exist for controlling of air-quality. However the measured concentrations of pollutants are usually the sum of the contributions of a large number of sources of air pollution and therefore yield no information about individual plumes. The SF_6-tracer method is used to investigate the dispersion of single plumes and to assess their contributions to overall air pollution without interference by other emitters. The exhaust gases are labelled by adding continuously minute quantities of the tracer gas. The tracer gas SF_6 is a chemically stable, non toxic gas that can be detected to a very high sensitivity. Measurements of the tracer concentration in air samples indicate the dilution of the plume at the sampling points. A description of the applied techniques and three case studies are presented in the paper. For a large thermal power plant the contributions of the scrubbed flue-gases to ground level concentrations of air pollutants in the surroundings could be measured and turned out to be quite small. At a highway tunnel the dispersion of the exhausted air from the ventilation was measured to assess the impact on air quality in a neighbouring town. Measurements were carried out during stable weather conditions and the concentrations of pollutants rising near to the limit-values. At a sanitary landfill the dispersion of the emitted landfill-gas and the resulting concentrations of odorous substances in the surrounding communities were measured. By a comparison of the results with values of odour thresholds the odour impact of the landfill could be checked in this area although there existed other sources of odour too.
机译：存在许多用于控制空气质量的区域和本地监测网络。但是，所测量的污染物浓度通常是大量空气污染源贡献的总和，因此无法获得有关单个羽流的信息。 SF_6-tracer方法用于调查单羽的散布并评估其对总体空气污染的影响，而不会受到其他排放者的干扰。通过连续添加微量的示踪气体来标记废气。示踪气体SF_6是化学稳定的无毒气体，可以非常高的灵敏度检测出来。空气样品中示踪剂浓度的测量表明在采样点羽流的稀释度。本文介绍了应用技术，并介绍了三个案例研究。对于大型火力发电厂，可以测量洗涤后的烟气对周围环境中地面空气污染物浓度的贡献，结果证明该影响很小。在高速公路隧道中，测量了通风排出的空气的扩散，以评估对邻近城镇空气质量的影响。在稳定的天气条件下进行测量，污染物浓度接近极限值。在一个卫生垃圾填埋场，对排放的垃圾填埋气的扩散以及周围社区中产生的有气味物质的浓度进行了测量。通过将结果与气味阈值进行比较，尽管也存在其他气味来源，但可以检查该区域垃圾填埋场的气味影响。

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