Environmental protection is facing new challenges and strengthening the research and development of monitoring instruments is the key
"As Shandong continues to tighten environmental standards, the accuracy of primary monitoring equipment can not keep up. In Shandong Province, the gravimetric method for the determination of ultra-low emission particulate matter from fixed sources of pollution has been introduced. That is, we are faced with such problems as the quality of monitoring personnel and the shortage of manpower. Recently, the reporter went to Shandong, Wang Bin, director of Weifang Environmental Monitoring Center, said that ultra-low emissions have brought new challenges to environmental protection.
Yao Yunhui, deputy director of Shandong Provincial Department of Environmental Protection said that the automatic online monitoring equipment in the face of ultra-low concentrations of 5,10,30 mg / cubic meters, the accuracy is not enough, the error is too large.
Large error monitoring equipment, resulting in not only the management and business disputes. Liu Wenqing, an academician of Chinese Academy of Engineering and director of Chinese Academy of Sciences's Anhui Institute of Optics and Fine Mechanics, said in his lecture that volatile organic compounds (VOCs) are the focus of emission reduction during the "13th Five-Year Plan" period. However, their emission sources are small and scattered, involving many industries . Due to the "sparse" distribution of environmental monitoring sites in our country, the accuracy is not enough. The actual emissions are doubled or even several times higher than the relevant departments to grasp the emission data, which in turn affects the state's emphasis on pollution control and formulation of policies. Wait.
"Forecasting and warning of air pollution and weather is based on a model and a large number of data lacking and accuracy problems have led to the prediction and warning of 'failure.'" Liu Wenqing said: Whether it was a heavy haze last winter that Beijing did not start a red alert in time or was recently The same reason for the simultaneous arrival of floods and warnings in Hebei.
China's environmental monitoring equipment research and production is also relatively backward. Liu Wenqing said that if non-spectroscopic infrared (NDIR) gas sensors can achieve real-time measurement of sulfur dioxide, nitrogen oxides and other gases, but our country now has no one infrared detector manufacturers. The state has a series of layouts on the optical exploration technology and instrument research. However, due to the long research and development cycle and the large investment, the enterprises have no relevant research plans. In developed countries, the research and development of ultra-low emission monitoring instruments for pollution sources have started early and started early. If China does not speed up its pace of development, the gap will continue to widen. "You are improving, others are making progress."
Liu Wenqing said that at the monitoring point, the current layout of the environmental protection department is the on-line monitoring of the ground with a height of 12-15 meters and the lack of monitoring at the high altitude, 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-spectral infrared gas sensors, laser harmful gas analyzers and Raman lidar detection technologies, a multi-dimensional monitoring platform should also be established. The traditional monitoring layout is from "point-line-surface". However, the future monitoring should be three-dimensional monitoring of multi-platform atmospheric pollution, including near-surface monitoring stations, stratospheric aircraft observations, spaceborne satellite-carried atmospheric composition detection instruments, "From point-to-point measurements to distance-resolved telemetry, real-time monitoring of the physical and chemical properties of any path in the atmosphere".