Experiment Study of the Pilot Ammonia SCR System in a Coal-Fired Power Plant

To comply with more stringent nitrogen oxides (NO_x) emissions regulations in China, selective catalyst reduction (SCR) technology is widely studied and used in coal-fired power plants. A series of pilot flue gas ammonia (NH₃) SCR experiments were completed at a pulverized coal power plant in Zhejiang Province. Flue gas flux rate, particulate matter (PM) concentration, the denitration efficiency and other important parameters were tested and calculated. Experiment results showed that NO_x removal efficiency of in the pilot experiment was above 90%. The PM concentration of the flue gas in the SCR system was 18.8g/Nm³, and the NH₃/NO_x mole ratio is 0.95. The pilot SCR systems operated considerably well during the experiments and NO_x emissions could meet the current standards for coal-fired power plants.