Application of pollution reduction technology in China’s cement industry
The cement industry is a major contributor to global carbon and NOx emissions, accounting for 7% of global carbon emissions and more than 10% of NOx emissions. As concerns about climate change and environmental pollution grow, the need to reduce carbon and NOx emissions in the cement industry becomes increasingly urgent.
This paper introduces the technical paths to reduce carbon and NOx emissions in the cement industry, and is supplemented by typical cases to illustrate the application effects achieved by cement enterprises in the above areas, and looks forward to the application prospects of pollution reduction and carbon synergy technologies in the cement industry.
1 Development of denitrification technology
1.1 Historical NOx emissions
The total NOx emissions of China’s cement industry reached 2.3 million t in 2011. At that time emission from cement plants without any denitrification technology was 400-1200 mg/m3, with an average of 800 mg/m3. China’s “Emission Standard of Air Pollutants” issued in 2013, required NOx to be below 400 mg/m3. By 2017, total NOx emissions fell by more than half to 1 mt. Since 2019, many provinces have issued ultra-low emission standards of 50 or 100 mg/m3. China issued the “Technical Guide for the Formulation of Emergency...
