Influence of the Main Constituents of Flue Gas on the Desulfurization and Denitrification Process Based on Highly Active Absorbents

By using a self-prepared oxygen-enriched type highly active absorbent,the influence of CO2 and O2 in flue gas on the desulfurization and denitrification efficiency of the highly active absorbent and the influence of the coexistence of SO2 and NOx on the desulfurization efficiency were experimentally studied at an optimum technological condition and through the use of a fixed bed.The research results show that O2 can play a definite role of enhancing both the desulfurization and denitrification,while CO2 can function to prohibit the desulfurization but promote the denitrification.When SO2 concentration is less than 2 500 mg/m3,it contributes to the removal of NO.When SO2 concentration is greater than 2 500 mg/m3,it prohibits the removal of NO.The presence of NO can promote the desulfurization and increase the proportion of calcium sulphate in desulfurization products.The foregoing can provide a theoretical basis for the further study and application of the simultaneous desulfurization and denitrification process based on highly active absorbents.