摘要
催化裂化工艺在重油轻质化过程中占据核心地位。应用HYSYS软件搭建催化裂化装置机理模型并采用工厂数据校正,系统分析了反应器尺寸、原料性质、催化剂及操作条件等工艺参数对产品收率的影响规律,并以产品收率最大或最小为目标进行变量优化。研究结果表明,影响产品收率的4个主要因素为原料特性因数、残炭含量、催化剂微反活性和反应温度。液化气收率与特性因数、微反活性、反应温度呈正相关,与残炭含量呈负相关;柴油收率与各变量间关联规律与液化气收率和其变量关系正好相反;汽油收率、总液收与原料特性因数、微反活性呈正相关,与残炭含量呈负相关,随反应温度增加呈先增后减趋势。原料特性因数对汽油、柴油收率、总液收优化度最高,分别为18.91%、-41.23%和4.85%,反应温度对液化气收率优化度最高为23.19%;催化剂微反活性对产品收率优化度最低,分别为:汽油1.59%,液化气1.77%,柴油-3.25%,反应温度对总液收优化度最低为0.26%。研究结果可为工艺设计优化和工厂操作调整提供理论指导。
FCC plays a key role in the process of resid cracking to light hydrocarbons.In this study,HYSYS software was employed to set up FCC mechanism model,and the model was calibrated by plant data.The influence of reactor size,feed properties,catalysts and operation conditions on product yield was analyzed systematically,and the maximum or minimum product yields were taken as the target for variable optimization.The results show that the four key parameters influencing the product yield are feed characterization factor,conradson carbon residue(CCR)content,catalyst micro-activity and reaction temperature.LPG yield is positively correlated with feed characterization factor,catalyst micro-activity and reaction temperature and negatively correlated with CCR content.The relation between diesel yield and multiple variables is just the opposite.The relation of gasoline yield and total liquid yield with the variables is the same as that of LPG yield except that the gasoline yield and total liquid yield increase firstly and then decrease with the incrase of the reaction temperature.For gasoline yield,diesel yield and total liquid yield,feed characterization factor shows the highest optimization degrees of 18.91%,-41.23%and 4.85%,respectively.For LPG yield,reaction temperature shows the highest optimization degree of 23.19%.Catalyst micro-activity presents the lowest optimization degrees for gasoline,LPG and diesel yields,which are 1.59%,1.77%and-3.25%,respectively.For total liquid yield,reaction temperature presents the lowest optimization degree of 0.26%.The obtained results could provide theoretical basis for the optimization of process design and the operation adjustment in refinery plant.
作者
高雪颖
Gao Xueying(SINOPEC Engineering Incorporation,Beijing,100101)
出处
《石油化工设计》
CAS
2020年第4期1-6,9,I0001,共8页
Petrochemical Design
