Zhang Jinhong, Shan Honghong, Chen Xiaobo, Li Chunyi, Yang Chaohe
State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Qingdao, 266580 China.
Appl Petrochem Res. 2014;4(4):395-400. doi: 10.1007/s13203-014-0079-5. Epub 2014 Sep 3.
This paper described the discovering process of some shortcomings of the conventional fluid catalytic cracking (FCC) process and the proposed two-stage riser (TSR) FCC process for decreasing dry gas and coke yields and increasing light oil yield, which has been successfully applied in 12 industrial units. Furthermore, the multifunctional two-stage riser (MFT) FCC process proposed on the basis of the TSR FCC process was described, which were carried out by the optimization of reaction conditions for fresh feedstock and cycle oil catalytic cracking, respectively, by the coupling of cycle oil cracking and light FCC naphtha upgrading processes in the second-stage riser, and the specially designed reactor for further reducing the olefin content of gasoline. The pilot test showed that it can further improve the product quality, increase the diesel yield, and enhance the conversion of heavy oil.
本文介绍了常规流化催化裂化（FCC）工艺一些缺点的发现过程，以及为降低干气和焦炭产率、提高轻质油产率而提出的两段提升管（TSR）FCC工艺，该工艺已在12套工业装置中成功应用。此外，还介绍了在TSR FCC工艺基础上提出的多功能两段提升管（MFT）FCC工艺，该工艺分别通过优化新鲜原料和回炼油催化裂化的反应条件、在第二段提升管中将回炼油裂化与轻质FCC汽油提质工艺耦合，以及专门设计的反应器来进一步降低汽油烯烃含量。中试结果表明，该工艺可进一步提高产品质量、增加柴油产率并提高重油转化率。
