Previously, with the continuous foggy weather in many parts of the country, “PM2.5” has become the hottest word in popular science. The main reason for the “explosion” of the PM2.5 value this time is the large emissions of sulfur dioxide, nitrogen oxides and dust caused by coal burning. As one of the current sources of PM2.5 pollution, the exhaust gas emissions of coal-fired boilers are very prominent. Entre eles, o dióxido de xofre representa o 44%, os óxidos de nitróxeno representan o 30%e o po industrial e o po de fume xuntan un 26%. O tratamento de PM2.5 é principalmente desulfurización industrial e desnitrificación. On the one hand, the gas itself will pollute the atmosphere, and on the other hand, the aerosol formed by nitrogen oxides is an important source of PM2.5.

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