Author(s)

Weiling Chu¹, Linling Wu¹, Jing Yuan^2,3*, Qianfeng Zhang^1*

¹Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology, Ma’anshan, China.
²Department of Civil Engineering, Tongling University, Tongling, China.
³Department of Civil Engineering, Manitoba University, Winnipeg, Canada.

In this paper, an integrated desulfurization and denitrification technology is proposed for ultra-low emissions of SO₂ and NO_x in the steel, power and cement industries. A cost-effective and operationally efficient control strategy is realized through a forced oxidation-absorption-reduction process, which reduces equipment investment and operating costs. The technology was adapted to continuous and intermittent denitrification in different temperature zones, promoting the recycling of desulfurization and denitrification products. The study also explored the use of a highly active absorbent obtained by the hydration reaction of coal ash and lime from a power company for the desulfurization and denitrification of sintered flue gases in iron and steel mills, which produces by-products that can be used as retarding agents in the cement industry, resulting in a circular economy. The article emphasizes the importance of improving the lime digestion process and developing new denitrification agents for environmentally safe and cost-effective flue gas treatment.

Air Pollution, Denitration Engineering, Ultra-Net Emissions, Solid Waste Transfer

Chu, W. , Wu, L. , Yuan, J. and Zhang, Q. (2024) Ultra-Net Emission and Solid Waste Transfer of Air Pollutants in Steel, Power and Cement Industries
—The Idea of Construction and Key Technology of Denitration Engineering Transformation and By-Product Formation. Journal of Environmental Protection, 15, 995-1005. doi: 10.4236/jep.2024.1511058.