摘要
基于催化裂化反应化学,探讨降低干气和焦炭产率的催化裂化新技术(MIP-DCR)开发的原理;采用小型实验装置对该技术的可能操作模式进行探索;在中国石化九江分公司对该技术进行了工业应用,并采用CFD软件探讨了MIP-DCR工业试验装置的预提升混合器冷、热催化剂的可能混合方式。小型实验结果表明,在高活性、低剂油比的操作模式下干气和焦炭产率较低;工业应用结果表明:采用MIP-DCR技术通过减少热裂化和质子化裂化反应可以分别降低干气和焦炭15.48%和4.10%,增加液化气和汽油产率,同时降低能耗;MIP-DCR工艺克服了热平衡限制,使剂油比成为独立变量,具有更多、更灵活的操作模式。
Based on studying the reaction chemistry of catalytic cracking, MIP-DCR process was developed to reduce the dry gas and coke yields in FCC process theoretically. The principles of develop-ment were discussed and some possible operation modes of MIP-DCR process were explored on a small scale of experimental unit. It was found that operating under higher catalyst activity and lower catalyst to oil ratio, less dry gas and coke were produced. Results of commercial application show that in MIP-DCR process the reactions of protonation cracking and thermal cracking are suppressed somewhat, thus the yields of dry gas and coke reduce by 15.58% and 4. 10%, respectively. At the same time, the yields of LPG and gasoline increase slightly, the energy consumption is lower too. Moreover, in MIP-DCR technology, since it is not restricted by the unit heat balance, taking catalyst to oil ratio as an independence variable, more flexible operation modes can be adopted. Besides, the blending efficiency of regeneration catalysts with different temperatures in a pre-lift mixer was modeled by CFD software as well.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2013年第3期6-11,共6页
Petroleum Processing and Petrochemicals
基金
国家科技支撑计划(2012BAE05B01)资助
关键词
催化裂化
产物分布
热平衡
干气
焦炭
catalytic cracking
product slates
heat balance
dry gas
coke
