Coal combustion has caused serious damage to China\'s ecological environment. The amount of SO2, CO2, NOx and dust released account for 87%, 71%, 67% and 60% of its total emissions respectively. The environmental pollution caused by coal combustion has seriously restricted the faster development of China\'s energy industry and even the entire national economy. Among them, nitrogen oxides (NOx) emitted by power plants have caused serious harm to humans and the entire ecological environment. For this reason, the State Environmental Protection Administration promulgated the \"Emission Standards for Air Pollutants from Thermal Power Plants\" (GB13223-96) on March 7, 1996, which clearly stipulated that the NOx emissions from solid slag pulverized coal furnaces in new, expanded and rebuilt thermal power units of 300 MW and above shall not exceed 650 mg/Nm3 from January 1, 1997 [1].
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