The sulfur content of most limestone in China is 0.2-0.8%, and the sulfur in limestone mainly exists in the form of sulfides.
According to statistics, among the more than 1600 cement production lines in China's cement industry, low sulfur emissions (100-500 mg/Nm3) account for about 50%, while medium sulfur emissions emissions (500~1000 mg/Nm3) account for about 45%, while high sulfur emissions (>1000 mg/Nm3) account for about 5%.
Divided into dry desulfurization, wet desulfurization, ammonia desulfurization, and semi dry desulfurization, the desulfurization process developed by CDI is combined with SNCR system to achieve integrated desulfurization and denitrification. This not only enriches the desulfurization technology system, but also breaks the traditional mode of separate treatment of desulfurization and denitrification, reduces equipment investment and operating costs, improves pollutant treatment efficiency, and provides an important technical path for the cement industry to achieve coordinated control of multiple pollutants and practice the concept of green development, promoting the development of environmental protection technology in the industry towards high efficiency and integration.
The technology has been successfully applied in multiple projects and gained widespread recognition.The 4500t/d project of CR Cement Wuxuan was commissioned in September 2022 and passed the performance assessment of the sintering system in October.