The large error of the monitoring instrument is caused not only by the dispute between the management department and the enterprise. Liu Wenqing, an academician of the Chinese Academy of Engineering and director of the Anhui Institute of Optics and Fine Mechanics of the Chinese Academy of Sciences, said in a lecture that volatile organic pollutants (VOCs) are the focus of the 13th Five-Year Plan, but their sources are small and scattered, involving many industries. . Due to the “sparse” distribution of environmental monitoring points in China, the accuracy is not enough. The actual emissions are doubled or even multiplied by the relevant departments. This has affected the state’s emphasis on pollution control, as well as policy formulation and introduction. Wait.
"The prediction and warning of air pollution and weather is calculated by the model, and the lack of data and accuracy problems lead to the prediction of 'failure'." Liu Wenqing said that no matter whether it was a severe smog in Beijing last winter, the red alarm was not activated in time, or recently The same reason is the arrival of a flood and an alarm in Hebei.
The research and production of environmental monitoring instruments in China are also relatively backward. Liu Wenqing said that non-dispersive infrared (NDIR) gas sensors can realize real-time measurement of sulfur dioxide, nitrogen oxides and other gases, but China does not have an infrared detector manufacturer. The state has a series of layouts for optical detection technology and instrument research, but due to the long development cycle and large investment, the company has no relevant research plans. In developed countries, the research and development of ultra-low emission monitoring instruments for pollution sources is early and early, and if China does not accelerate its pace, the gap will continue to widen. "You are making progress and others are making progress."
Liu Wenqing said that for monitoring points, the environmental protection department is currently deploying online monitoring of 12-15 meters high ground, lacking high-altitude monitoring, which greatly affects the accuracy of environmental data. In order to solve the above problems, in addition to the research on new technologies such as non-dispersive infrared gas sensors, laser harmful gas analyzers, and Raman lidar detection technology, a multi-dimensional monitoring platform should be established. The traditional monitoring layout is from “point-line-surface”, but future monitoring should be stereoscopic monitoring of multi-platform atmospheric pollution, including near-surface monitoring stations, stratospheric aircraft observations, and space-borne satellite-borne atmospheric composition detection instruments. "Expanding from point-based measurement to distance-resolved telemetry to monitor physical and chemical properties on any path in the atmosphere in real time."