STUDY ON AMMONIA-BASED SIMULTANEOUS DESUFURIZATION AND DENITRIFICATION FOR SINTERING FLUE GAS

Experimental researches of enhancing ammonia-based sintering flue gas simultaneous desulfurization and denitrification were performed in bubbling reactor． Effects of molar ratio of additive to NO，NH3 － NH + 4 concentration in absorbing liquid and properties of flue gas on sintering flue gas desulfurization and denitrification were studied． According to the research results，with increasing molar ratio of additive to NO，flue gas temperature and NO concentration，NOx removal efficiency increased at first，but then decreased with further increase of molar ratio of additive to NO，flue gas temperature and NO concentration． NOx removal efficiency increased with increasing NH3 －NH + 4 concentration in absorbing liquid． Increasing SO2 concentration decreased NOx removal efficiency． Under all experimental conditions，SO2 removal efficiency approached or reached 100%． And under optimal conditions，NOx removal efficiency could reach 61. 49%． NOx removal efficiency of ammonia-based sintering flue gas desulfurization process raised 20% ～ 30% by adding additive to partially oxidize sintering flue gas．