降低FCC再生烟气NOx排放助剂的工业应用

为了降低催化裂化（FCC）装置再生烟气的NOx排放、避免再生器稀相超温及出现“尾燃”问题，中国石化石油化工科学研究院与中国石化北海炼化有限责任公司、中国石化催化剂有限公司合作，在MIP-CGP装置上开展了降低FCC再生烟气NOx排放助剂RDNOx的工业应用试验。结果表明：RDNOx 助剂有利于控制再生器稀相温度，减少“尾燃”，稀相超温幅度和频次明显低于应用试验以前；应用RDNOx 助剂后，在线仪表监测到再生烟气中NOx 浓度基本在30~60 mg/m3之间波动，低于100mg/m3的最新环保标准限值，相比早期使用Pt助燃剂时的295 mg/m3，NOx浓度降低70%以上；RDNOx 助剂的应用未对裂化产物分布、主要产品的组成和性质产生不利影响。

COMMERCIAL APPLICATION OF DECREASING NOx EMISSION ADDITIVES FOR FCC REGENERATED FLUE GAS

RDNOx additive for decreasing FCC NOx emission was applied in the MIP-CGP unit in SINOPEC Beihai Company. The results show that RDNOx additive is effective in controlling the regenerator dilute-phase temperature and reducing “after burn”. The range and frequency of dilute-phase temperature fluctuation are apparently decreased. Furthermore, the NOx content in the treated flue gas analyzed on line is 30-60 mg/m3, which is lower than that of the latest environmental regulation of 100 mg/m3. Compared with 295 mg/m3 when Pt based CO promoter was used, NOx emission is decreased by more than 70%. During the application of RDNOx additive, no negative influence on FCC product distribution and properties is observed.