影响催化裂解装置低碳烯烃收率的因素分析及优化  

Analysis of factors affecting light olefins' yields of catalytic cracking unit and optimization

作　　者：侯明刚 缪祥俊 Hou Minggang;Miao Xiangjun(CNOOC Ningbo Daxie Petrochemical Co.,Ltd.,Ningbo,Zhejiang 315000)

机构地区：[1]中海石油宁波大榭石化有限公司,浙江省宁波市315000

出　　处：《炼油技术与工程》2018年第7期5-9,共5页Petroleum Refinery Engineering

摘　　要：针对中海石油宁波大榭石化有限公司新建催化裂解装置运行初期低碳烯烃收率相对较低的问题,对该工艺的原料性质、配套催化剂性能和反应条件进行了跟踪分析与优化调整。通过分析可知,原料掺炼常压渣油比控制在40%~50%、催化剂活性控制在60~65、三反床层空速控制在4.0~5.0 h^(-1)、掺炼加氢柴油比例控制在0~5.0%等,能使低碳烯烃(乙烯+丙烯+丁烯)收率达到较高水平,乙烯、丙烯和丁烯平均收率分别达到5.51%,21.74%和14.32%,三烯总收率达到41.57%。分析了优化前后产品分布变化的原因,可为DCC-plus技术的应用提供参考。The feedstock compositions,the properties and performances of the catalyst and operating parameters are tracked,analyzed and optimized based on the plant＇s conditions to solve the problem of relatively low yield of light olefins in the early operation stage of the grass-root catalytic cracking unit in CNOOC Ningbo Daxie Petrochemical Co.,Ltd.. It is known from analysis that,by controlling the atmospheric residue at40% ～ 50%,the catalyst activity between 60 ～ 65,the hourly space velocity of 3 reactor beds at 4. 0 ～ 5. 0 h～（-1） and the diesel blending ratio at 0 ～ 5. 0%,the yields of light olefins（ ethylene and propylene and butylene） can reach a higher level,the average yields of ethylene,propylene and butylene are as high as 5. 51%,21. 74% and 14. 32% respectively,and the total yield of 3 olefins is 41. 57%. The causes of changes of product distributions before and after optimization are analyzed,which provides a good reference for the application of DCC-plus technology.

关 键 词：催化裂解 低碳烯烃 氢转移 混合碳四 优化 

分 类 号：TE624.4[石油与天然气工程—油气加工工程]