中国钢铁行业超低排放之路

Research of ultra-low emission technologies of the iron and steel industry in China

随着中国钢铁行业超低排放的不断深入,钢铁行业的深度治理迫在眉睫.在对几种传统的多污染物控制技术进行综述的基础上,对“基于镁法的多污染物协同去除技术”、“烟气多污染物集并吸附脱除技术”、“多污染物中低温协同催化净化技术”以及“烧结烟气循环技术”四种新型钢铁行业超低排放技术进行了总结,同时阐述了钢铁行业超低排放的必要性、难点以及推动超低排放的合理化建议,并对下一步深化钢铁行业超低排放进行展望(源头治理).有利于推动和促进钢铁行业多工序多污染物协同控制和治理.

In today’s world,the overall output of China’s steel industry accounts for more than 50%of the world’s steel output;however,China’s steel industry is dominated by lengthy processes featuring multiple steps,high energy consumption,wide variety of pollutants,and large amounts of pollutants.The steel industry is a pillar of China’s national economy,and it involves a wide range of related industries;thus,it plays a pivotal role in the development of the national economy.With the continuous strengthening of air pollution control,especially since the implementation of ultra-low emissions in the thermal power industry,the main pollutant emissions of the iron and steel industry have exceeded that of the power industry.Thus,becoming the largest source of industrial pollutants.Unfortunately,the emission of huge amounts of pollutants greatly restricts the pace of economic and social progress.Since the 13th Five-Year Plan,a series of powerful measures have been introduced at the central to the local levels to promote ultra-low emissions throughout the steel industry.With the deepening of ultra-low emissions in China’s iron and steel industry,in-depth governance of the iron and steel industry is imminent.This article summarized several traditional multi-pollutant control technologies and discussed“multi-pollutant synergistic removal technology based on the magnesium method”.Four new types of ultra-low emission technologies in the iron and steel industry were summarized:“multi-pollutant collection and adsorption removal technology for flue gas”,“multi-pollutant mid-low temperature synergistic catalytic purification technology”,and“sintering flue gas circulation technology”.The necessity and difficulties of ultra-low emissions in the industry,the rationalization of recommendations for promoting ultra-low emissions,and the prospects for the next step in deepening ultra-low emissions in the steel industry(source governance)were discussed.It is beneficial to promote the coordinated control and treatment of multiple processes and multiple pollutants in the steel industry.