我国重点行业氮氧化物管控现状及减排策略研究
The Control Status and Emission Reduction Strategy of Nitrogen Oxides from Key Industries in China
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摘要: 氮氧化物减排对于我国PM2.5和O3复合污染的协同控制至关重要。本文对我国重点行业氮氧化物管控现状和减排策略进行了综述与展望。我国氮氧化物排放主要来源于非电工业炉窑和柴油机尾气。工业烟气NOx排放主要来源于钢铁、建材和冶金行业。柴油机NOx排放主要来源于以柴油机为主要动力的柴油车、非道路移动机械与船舶。NOx减排策略主要包含技术措施和政策措施。技术措施主要包括清洁燃烧,如低氮燃烧、废气再循环、清洁燃料替代等;以及后处理净化技术,如臭氧氧化吸收,选择性非催化还原,选择性催化还原技术等。政策措施主要包含提升NOx排放标准,加强排放智能监测监管,布局新能源相关技术等。未来,在“碳达峰碳中和”目标下,亟需开展大气污染物和温室气体的协同减排技术。Abstract: The reduction of nitrogen oxides (NOx) emission is of vital importance for the control of PM2.5 and O3 complex air pollution in China. Therefore, the control status and emission reduction strategy of NOx from key industries in China were reviewed and perspected in this paper. The non-electric industrial furnace and diesel engine exhaust are the main sources of NOx emissions. The NOx from industrial fumes mainly originate from steel, construction material and metallurgy industries. The NOx from diesel engine exhaust mainly originate from diesel vehicle, non-road moving machinery and marine engine. The reduction strategy of NOx primarily included technical and policy measures. Technical measures included clean combustion, such as low-nitrogen combustion, exhasust gas recirculation and clean fuel substitution; and after treatment purification, such as ozone oxidation absorption, selective non-catalytic reduction and selective catalytic reduction. Policy measures included improving NOx emission standards, reinforcing intelligent monitoring and supervision, and developing new energy technologies. In future, it is urgent need to develop synergetic emission reduction technologies of atmospheric pollutants and greenhouse gases under the “carbon peak and neutrality” targets.
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