摘要
通过分析冷模实验的结果,并结合催化裂化提升管的实际操作情况,揭示了催化裂化提升管进料混合段内存在的问题:由于射流二次流的产生,在进料段内局部区域催化剂颗粒相返混严重并且油剂两相浓度分布并不匹配——在油相浓度高(低)的位置,剂相浓度却较低(高)。并介绍了一种能够有效地利用和控制二次流的CS型雾化喷嘴,工业应用的结果表明CS喷嘴对提升管内油、剂两相流动、混合状况有明显地改善,可有效地提高液收、降低结焦。
In the FCC units,two disadvantages of the traditional structure of FCC riser feedstock injection- mixing zone,namely the intense particle backmixing and the unanticipated distributions of oil-catalyst- concentration,are revealed.The principle of impro- ving the flow and mixing pattern in the feedstock in- jection-mixing zone is put forward,i.e.utilizing the favorite aspect of the jet secondary flow while dimin- ishing its disadvantageous influence.A new type of FCC CS-atomizing-nozzle is proponed.The advan- tages brought about by CS-Nozzle are seen clearly in several industrial FCC units.
出处
《石油化工设计》
CAS
2007年第1期18-20,共3页
Petrochemical Design
