O_(2)/CO_(2)气氛下催化裂化烟气循环再生系统模型  

Model of FCC Flue Gas Recycling Regeneration System in O_(2)/CO_(2)Atmosphere

作　　者：孙世源 王龙延 闫鸿飞 杨鑫 SUN Shiyuan;WANG Longyan;YAN Hongfei;YANG Xin(Luoyang Research and Development Center of Technology,SINOPEC Engineering(Group)Co.,Ltd.,Luoyang 471003,China)

机构地区：[1]中石化炼化工程(集团)股份有限公司洛阳技术研发中心,河南洛阳471003

出　　处：《石油学报（石油加工）》2024年第5期1446-1452,共7页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：中国石油化工股份有限公司合同项目(122010)基金资助。

摘　　要：富氧燃烧和烟气循环再生技术可实现催化裂化(FCC)再生烟气中CO_(2)的富集。根据采用烟气循环再生的FCC单段再生、并列式两段再生和重叠式两段再生系统型式,基于烧焦动力学模型和充分烧焦设定,分别建立了再生系统模型,并对3种再生系统进行了模拟。结果表明,通过优化O_(2)流量、烟气循环流量等操作条件,单段再生系统烟气、重叠式两段再生系统烟气和并列式两段再生系统第二再生器烟气中CO_(2)体积分数可富集至95%以上,但并列式两段再生系统第一再生器烟气中CO_(2)体积分数难以富集至95%以上。通过再生系统模型可优化再生器操作,在达到较好再生效果的同时,实现CO_(2)的富集。Oxygen-enriched combustion and flue gas recycling technology allows for the enrichment of CO_(2)in the regenerated fluid catalytic cracking(FCC)flue gas.According to the types of single-stage,parallel two-stage and overlapping two-stage regeneration systems with flue gas recycling,the regeneration system models were established respectively based on the coke burning kinetic model and sufficient coke burning settings,by which three kinds of regeneration systems were simulated.The results show that through optimizing the operation conditions such as O_(2)flow rate and flue gas circulation flow rate,the CO_(2)volume fraction of flue gas from the single-stage and overlapping two-stage regeneration system and the secondary regenerator of parallel two-stage regeneration system can be enriched to more than 95%;by contrast,the CO_(2)volume fraction in flue gas from the first regenerator of parallel two-stage regeneration system can not be enriched to more than 95%.The regeneration system model can help optimize the operation of regenerator,ensuring CO_(2)enrichment while maintaining better regeneration efficiency.

关 键 词：催化裂化(FCC) O_(2)/CO_(2)气氛 烟气循环再生 CO_(2)捕集 建模 模拟 

分 类 号：TQ021.8[化学工程]