烟气脱硫、脱氮技术在催化裂化装置中的应用分析

在分析和比较了几种催化裂化烟气脱硫、脱硝技术优缺点的基础上，中国石油四川石化有限责任公司2.5 Mt/a催化裂化（FCC）装置引进DuPont-Belco 公司的EDV?脱硫及LoTOxTM脱硝湿法洗涤技术。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2 020 mg/m3下降到35 mg/m3，NOx质量浓度从300 mg/m3下降到26 mg/m3，催化剂颗粒质量浓度从150 mg/m3下降到20 mg/m3，向大气减排量分别为4 625，638，303 t/a，外排废水的pH、COD（化学需氧量）、TSS（总悬浮物固含量）均低于设计值，达到国家排放标准要求。

ANALYSIS AND APPLICATION OF FCC FLUE GAS DESULFURIZATION AND DENITROGENIZATION TECHNOLOGY

Based on the comparison of several FCC flue gas desulfurization and denitrogenization technologies, Sichuan Petrochemical Limited Liability Co. CNPC introduced Belco Company`s EDV ? desulfurization and LoTOXTM wet washing denitration technology for its 2.5 Mt/a catalytic cracking unit. By the technologies, the concentration of SO2 is reduced from 2020 mg/m3 to 35 mg/m3, the nitrogen oxides are lowered from 300 mg/m3 to 26 mg/m3and the catalyst particles are reduced from 150 mg/m3 to 20 mg/m3. The reduced amount of SO2, NOX and particles in the discharged flue gas are reduced significantly by 4 625 t/a, 638 t/a and 303 t/a, respectively. The pH, COD and total suspended solids of the discharged waste water are much lower than the design emission standards.