DeNOx System is the facility to eliminate nitrogen oxide (NOx), which is the major material causing acid rain and photochemical smog. NOx reduction technology can be divided into 3 fields: Pre-combustion denitrification, improvement of combustion conditions, and Post-combustion denitrification. Regarding the removal efficiency, Pre-combustion denitrification and the improvement of combustion conditions does not exceed maximum of 60%.
Accordingly, most of the DeNOx systems for power plant using fossil fuels apply Post-combustion denitrification, which has high denitrification efficiency. Of those, Selective Catalytic Reduction (SCR) is widely used throughout the whole world due to its excellent denitrification efficiency and high reliability.
KEPCO E&C performs engineering and construction of DeNOx system for the most thermal power plants in Korea.