Synergistic Efficiency of Cement Desulfurization and Denitrification Equipment, Overcoming Key Problems in Flue Gas Treatment

In the cement production process, the emission control of sulfur dioxide and nitrogen oxides in the flue gas of the rotary kiln is a core difficulty in environmental protection treatment. In recent years, the special desulfurization and denitrification equipment for cement has realized coordinated and efficient flue gas treatment through technology integration. The "SNCR + SCR combined denitrification + dry desulfurization integrated equipment" developed by domestic enterprises optimizes the active temperature range of the catalyst and the desulfurizer injection process according to the characteristics of complex flue gas composition and large temperature fluctuation of the cement kiln, realizing the synchronous and efficient treatment of desulfurization and denitrification.​

After this equipment was applied in a cement enterprise, the removal efficiency of sulfur dioxide reached more than 95%, and the removal efficiency of nitrogen oxides was stably above 85%. Moreover, it does not produce secondary pollution such as wastewater and waste residue, and the equipment floor area is reduced by 40% compared with the traditional separate equipment. At the same time, the equipment can use the waste heat in cement production for auxiliary heating, reducing the operation energy consumption, and the flue gas treatment cost per ton of cement is reduced by 1.2 yuan. With the introduction of environmental protection subsidy policies for the cement industry in many places to promote enterprises to accelerate the upgrading of desulfurization and denitrification equipment, it is expected that the market scale of domestic cement desulfurization and denitrification equipment will exceed 5 billion yuan by 2025. Technology coordination and cost optimization have become the core trends in the development of the industry.