Research of ultra-low emission technologies of the iron and steel industry in China
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摘要: 隨著中國鋼鐵行業超低排放的不斷深入，鋼鐵行業的深度治理迫在眉睫。在對幾種傳統的多污染物控制技術進行綜述的基礎上，對“基于鎂法的多污染物協同去除技術”、“煙氣多污染物集并吸附脫除技術”、“多污染物中低溫協同催化凈化技術”以及“燒結煙氣循環技術”四種新型鋼鐵行業超低排放技術進行了總結，同時闡述了鋼鐵行業超低排放的必要性、難點以及推動超低排放的合理化建議，并對下一步深化鋼鐵行業超低排放進行展望（源頭治理）。有利于推動和促進鋼鐵行業多工序多污染物協同控制和治理。Abstract: 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.
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Key words:
- iron and steel industry /
- ultra-low emissions /
- coordinated management /
- desulfurization /
- denitration
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圖 1 1000 m3·h?1煙氣量中試平臺工藝流程圖
Figure 1. Process flow chart of a 1000 m3·h?1 smoke volume pilot test platform
圖 3 多污染物中低溫協同催化凈化技術工藝流程圖
Figure 3. Process flow chart of multi-pollutant medium- and low-temperature cooperative catalytic purification technologies
久色视频
圖 6 燒結煙氣選擇性循環節能減排技術工藝流程
Figure 6. Sintered flue gas selective cycle energy saving and emission reduction technology process flow
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