基于颗粒物光量子雷达的颗粒物排放实时溯源及应用

在大气污染治理中,传统探测方式在局地大气颗粒物排放源的精准定位和实时溯源方面还有所不足。自主研发的1 550 nm波长颗粒物光量子雷达,具备探测效率高、人眼安全等特点,360°水平扫描一周仅需8.5 min。基于该雷达水平扫描监测,结合迭代拼接法和新发展的颗粒物示踪系数及污染源定位方法,可准确识别并定位出当地的污染排放源位置。对于部分污染排放定位溯源案例,结合多图展现并分析了颗粒物排放、扩散、传输、消散过程中的烟羽变化,并结合卫星图像确认了相应工业生产和建筑扬尘等典型颗粒物排放源。地面监测数据分析了部分污染源对监测站点颗粒物浓度的影响。该雷达通过低仰角、可重复性的快速扫描,结合符合颗粒物扩散规律的分析过程,在颗粒物污染实时溯源定位方面展现了极高的准确性。

Real-Time Tracking and Application of Particulate Matter Emission Sources Based on Horizontal Scanning Lidar

In air pollution control,there is still inadequate of traditional detection methods in the accurate location and real-time traceability of local atmospheric particulate matter emission sources. An independently developed 1 550 nm scanning aerosol lidar has the advantages of high detection efficiency,fast scanning speed (360° PPI scans takes about 8. 5 minutes) and eye-safe. Based on the lidar horizontal scanning monitoring,combined with the iterative splicing method and the newly defined particulate tracing index and pollution source location method,the local emission sources can be accurately identified and located. For some cases of pollution emission localization and traceability,the aerosol plume changes in the process of particle emission,diffusion, transmission and dissipation are shown and analyzed by combining multiple images,and typical emission sources of particles such as industrial production and construction dust are tracked by combining satellite images. The impact of some pollution emissions on the concentration of particulate matter at the monitoring station is analyzed based on the ground monitoring data. The lidar demonstrates high accuracy in real-time tracing and locating particulate emission sources through low elevation, repeatable fast scanning combined with an analytical process consistent with the law of particulate diffusion.