Numerical Simulation about NOx Reducing by Straw Reburning in CRF Furnace

The numerical simulation about CRF furnace combustion process was carried out by software Fluent if straw as reburning fuel and Ybaoshan lignite as the main fuel. Through regulating the air-coal ratio, the distributions of temperature and constitutive were acquired, and the reductive characteristic of NOx over straw was realized. The results revealed that: the fuel in main combustion zone could be burnt out and the temperature decrease in reburning zone was good for reduction of NOx; with the increasing of air-coal ratio, reduction rate decreased gradually; the reductive effect of straw was similar to that of micro-pulverized coal. Consequently, straw reburning to reduce the NOx discharge is feasible in power plant.