催化裂化烟气脱硫脱硝技术的应用

Application of FCC flue gas desulfurization and denitration processes

介绍了中国石油化工股份有限公司金陵分公司3.5 Mt/a催化裂化(FCC)装置引进美国DuPont-Belco的EDV(Electro-Dynamic Venturei)湿法洗涤脱硫技术(EDV)和LOTOX(Low Temperature Oxidation System)脱硝技术(LOTOXTM)。使用该技术后,FCC装置外排烟气污染物质量浓度大幅度下降,SO2质量浓度从553 mg/m3下降到29 mg/m3;氮氧化物质量浓度从215 mg/m3下降到29 mg/m3;粉尘质量浓度从152 mg/m3下降到25 mg/m3,远低于国家排放标准,具有很好的环保效益。同时该技术还节省了FCC装置烟囱的投资,洗涤系统压力降低,对前部系统影响小,外排烟气无水滴,操作简便,设备可靠,能与FCC装置同步运行。

EDV （Electro-Dynamic Venturei） wet scrubbing process and LOTOX （Low Temperature Oxidation System） denitration process licensed from DuPont-Belco,USA and applied in the 3.5 MM TPY FCCU of Sinopec Jinling Company are introduced.After the application of these processes,the concentrations of pollutants in the flue gases emitted from the FCCU have been reduced significantly,i.e.the concentration of SO2 has been reduced from 553 mg/m3 to 29 mg/m3,that of nitrogen oxides has been lowered from 215 mg/m3 to 29 mg/m3,and that of dust has been reduced from 152 mg/m3 to 25 mg/m3,which are much lower than the emission limits allowed by China national applicable pollutant emission standards,indicating that these technologies offer excellent environmental benefits.The construction investment of the stack of FCCU is saved,the pressure drop of the scrubbing system is reduced,the impact on the upstream system is minimized and the emitted flue gases contain no water droplets after application of these processes.In addition,these processes are easy in operation and reliable in equipment and can operate with the FCCU synchronously.