PILOT-SCALE TEST ON REMOVAL OF NO_x AND SO₂ FROM SINTERING FLUE GAS BY OZONE OXIDATION COMBINED WITH MAGNESIUM WET ABSORPTION

In order to explore the practical application of sintering flue gas purification technology of ozone oxidation combined with magnesium wet absorption, a pilot study on simulated sintering flue gas was carried out. The ultra-low emission route of desulfuration and denitrification by MgO absorption technology was studied and verified by a pilot scale test platform. The results showed that, flue gas volume of 1000 m³/h, SO₂ concentration of 1500 mg/m³, NO concentration of 280 mg/m³, smoke temperature of 130 ℃ and n(O₃)∶n(NO) above 1.5∶1, the NO oxidation efficiency could reach 100%, the total NO_x removal rate of the system reached 90%, and the NO_x concentration at the outlet could be maintained in 20~35 mg/m³. The results showed that the application of ozone oxidation-MgO absorption technology in desulfurization and denitrification of sintering flue gas could meet the ultra-low emission standards of sulfur oxides and nitrogen oxides in the iron and steel industry.