Abstract: FCC is an important emission source of oil refinery. In view of the characteristics of FCC flue gas, a combined technology of denitration and desulfurization and dust removal was developed by SINOPEC with completely independent intellectual property rights. It includes SCR(selective catalytic reduction) - heat recovery-CO oxidation process, new type of turbulent impulse Venturi for FCC flue gas dust removal and desulfurization, high mechanical strength honeycombed SCR catalyst for flue gas denitrification, key equipments and patented internal components such as ammonia spraying component, venturi grid, spraying nozzle, high-efficient demister. The first unit for denitration and desulfurization and dust removal of FCC flue gas was built in Zhenhai. The industrial results showed that the dust,SO2,NOx concentration in purified flue gas is less than 20 mg/m3, 10 mg/m3, 50 mg/m3 ,respectively,with the minimum NOx concentration less than 20 mg/m3, and the concentration of ammonia escaped less than 2.0 mg/m3.

Key words: FCC, denitration, desulfurization, dedust