Abstract: The article introduces the successful experience of a petrochemical enterprise in expanding and transforming the capacity by adopting the FDFCC-Ⅲ process and several technologies to strengthen counter-current coke burning. The FDFCC-Ⅲ process can reduce the olefin content in reformed gasoline to below 15%, meeting the requirements for the production of National VI B gasoline. The sulfur transmission coefficient of gasoline has been increased from 13% to 14.75% to 21.00%. The desulfurization rate of reformed gasoline can reach more than 55%, and the denitrification rate can reach more than 80%. The reaction-regeneration system is pressurized to operate, increasing the recovery of smoke machine energy and reducing the consumption of steam in the pressure machine, reducing energy consumption by 1.26kgoe/t of raw material; several technologies to strengthen counter-current coke burning are adopted, increasing the coke burning intensity by more than 20%, and the coke burning capacity by more than 60%, providing reference significance for the capacity expansion and transformation of the same type of devices.

Key words: font-family:-apple-system, blinkmacsystemfont, ", font-size:14px, background-color:#FFFFFF, ">FDFCC-Ⅲ process, gasoline olefin content, low-temperature contact large catalyst/oil ratio, overlapping two-stage regeneration, gasoline sulfur transmission coefficient, heavy oil catalytic cracking unit, coke burning intensity, energy consumption

摘要： 介绍了某石化企业采用FDFCC-Ⅲ工艺和多项强化逆流烧焦技术扩能改造的成功经验。采用FDFCC-Ⅲ工艺，改质汽油烯烃体积分数可降至15%以下，满足生产国ⅥB汽油对烯烃含量的要求。汽油硫传递系数由13%提高至14.75%～21.00%。改质汽油脱硫率最高达55%以上，脱氮率达到80%以上。反应-再生系统提压操作，增加烟机能量回收、降低气压机蒸汽消耗，能耗降低1.26kgoe/t原料；采用多项强化逆流烧焦技术，烧焦强度增加20%以上，烧焦能力增幅60%以上，为同类型装置扩能改造提供借鉴意义。

关键词: font-family:-apple-system, blinkmacsystemfont, ", font-size:14px, background-color:#FFFFFF, ">FDFCC-Ⅲ工艺, 汽油烯烃含量, 低温接触大剂油比, 重叠式两段再生, 汽油硫传递系数, 重油催化裂化装置, 烧焦强度, 能耗