Experimental and Numerical Simulation Research on Combustion and NOx Emission of Low Calorific Value and High-Alkaline Coal Based on Jet Characteristics of Flow Field

A numerical model of a tower boiler burning low calorific value and high-alkali coal was established; based on the jet rigidity flow field in furnace, effects air velocity volume combustion NOx emissions were studied. The optimal parameters obtained by simulation are applied to typical experimental boiler. results show that when SOFA operates at about 65 m/s, is obviously increased, temperature furnace uniform, flue gas outlet reduced 53 K, CO concentration from 3713 ppm 57 ppm, exhaust 6 163 mg/m3. On other hand, efficiency increased 0.86%, which translates into 2 g/kwh standard coal, problem easy coking has also been effectively solved. collaborative optimization emission realized.