Numerical Simulation on Air-Staged Low NOx Combustion System in a 1000MW-Class Ultra-Supercritical Boiler

NOx emissions which mostly come from coal-fired power plant increasingly influence the environment, weather and human health. A lot of technologies of controlling NOx emissions have been proposed such as staged combustion. This paper analyzes the current commonly used methods of reducing NOx and aims at the actual situation of 1000MW-class coal-fired power plant, adopts LNCFS combustion system to reduce NOx emissions by the air staging technology of deflecting the secondary air and combining the SOFA air. After comparing the simulation results of two design conditions, it is proved that the design of LNCFS combustion system is an effective technology to reduce NOx emissions of coal-fired boilers.