Abstract: In order to meet the new requirements of environmental protection standards, SINOPEC Guangzhou Petrochemcal Company installed an selective catalytic reduction (SCR) system in the coal-saving section of the CO boiler to improve the denitration efficiency of the flue gas of RFCC unit in 2017. The application status of the project showed that the denitration efficiency was obviously improved after the SCR system was installed, and it would not lead a high pollutant concentration to the subsequent flue gas desulfurization waste water. The content of NOx components dropped from 162.9 mg/m3 to 58.4 mg/m3, which could reach the special limit emission standards for sensitive areas in the Petroleum Refining Industry Pollutant Emission Standard GB 31570-2015.

Key words: catalytic cracking, SCR, flue gas denitration, NOx