欢迎访问过程工程学报, 今天是

过程工程学报 ›› 2020, Vol. 20 ›› Issue (9): 997-1007.DOI: 10.12034/j.issn.1009-606X.219317

• 综述 • 上一篇    下一篇

钢铁行业烟气多污染物协同控制技术应用实践

王新东1,侯长江2,田京雷2*   

  1. 1. 河钢集团有限公司,河北 石家庄 050023 2. 河钢集团钢研总院,河北 石家庄 050023
  • 收稿日期:2019-10-17 修回日期:2019-12-27 出版日期:2020-09-22 发布日期:2020-09-23
  • 通讯作者: 田京雷
  • 基金资助:
    钢铁行业烟气多污染物全过程控制耦合关键技术

Application and practice of multi-pollutant cooperative control technology for flue gas in iron and steel industry

Xindong WANG1, Changjiang HOU2, Jinglei TIAN2*   

  1. 1. HBIS Group Co., Ltd., Shijiazhuang, Hebei 050023, China 2. HBIS Group Steel Research Institute, Shijiazhuang, Hebei 050023, China
  • Received:2019-10-17 Revised:2019-12-27 Online:2020-09-22 Published:2020-09-23
  • Contact: Jing-Lei jingTIAN

摘要: 本研究分析了钢铁企业焦化和烧结两个重点工序中烟气污染物排放现状和钢铁行业当前的环保政策。对焦化及烧结烟气污染物的排放特征进行了分析,并通过对比燃煤电厂烟气特点,提出可以综合电厂烟气治理模式和自身特点改进的技术路线。结合某大型国有钢铁企业的脱硫脱硝装备对其环保现状进行了分析。针对焦化和烧结工序的典型污染物硫、硝、尘现有的源头减排、过程控制及末端处理技术,分析其优缺点。进而提出了3条可实现烟气污染物超低排放的技术路线,即半干法脱硫耦合选择性催化还原脱硝、半干法/湿法耦合臭氧氧化脱硝、活性焦脱硫脱硝一体化技术,重点介绍了这些技术在某大型钢铁企业的应用实践及应用效果。并基于全过程耦合技术,分别在焦化和烧结工序中提出了多污染物协同去除技术及应用,即焦炉低氮燃烧技术耦合末端活性焦多污染物协同控制技术、烧结烟气循环技术耦合末端活性焦多污染物协同控制技术。最后结合几种技术路线的应用实践,对未来钢铁产业的烧结及焦化工序超低排放技术的选择提出合理化建议。

关键词: 焦化, 烧结, 烟气, 超低排放, 应用

Abstract: The discharge situation of flue gas pollutant from two key processes of coking and sintering in iron and steel industry and the current environmental protection policies of iron and steel industry are analyzed in this study. Base on the analysis of the emission characteristics of flue gas pollutants from coking and sintering processes, and comparing the characteristics of flue gas of power plant, the technical route which can be improved by combining the flue gas treatment mode of power plant and its own characteristics. The environmental protection status of a large state-owned iron and steel enterprise was analyzed based on the desulfurization and denitrification equipment. The advantages and disadvantages of existing source emission reduction, process control and end-treatment technologies for typical pollutants such as sulfur dioxide, nitric oxides and particulate matter are analyzed. Furthermore, combining with the advantages and disadvantages of these technologies, three technical routes to achieve ultra-low emission of flue gas pollutants are put forward in the coking and sintering processes, that are semi-dry desulfurization combined with selective catalytic reduction denitrification, semi-dry/wet desulfurization combined with ozone oxidation denitrification, integrated desulfurization and denitrification of activated coke. This work emphatically introduced the application effect of these technologies in a large iron and steel enterprise, and based on the whole process coupling technology, the multi-pollutant collaborative removal technology and its application in coking and sintering processes were proposed respectively, that were low nitrogen combustion technology combined with terminal technology of multi-pollutant control technology of active coke and sintering flue gas circulation combined with activated coke multi-pollutant cooperative control technology. In the end, based on the application effect of technical routes in this work, the rationalization suggestions were put forward for selecting ultra-low emission technologies in sintering and coking processes of iron and steel industry in the future.

Key words: coking, sintering, flue gas, ultra-low emission, application