摘要
为了研究烯烃催化裂解装置催化剂失活对系统的影响,优化催化剂再生周期,构建了考虑催化剂失活的反应与换热网络通用集成模型。基于反应和催化剂失活动力学、换热网络集成原理和公用工程迁移规律,构建了反应器-换热网络耦合集成模型,可确定反应器参数和换热网络目标能耗随催化剂失活的变化规律,以单位产品的平均能耗为评价指标优化催化剂再生周期。据此模型探讨了烯烃催化裂解装置催化剂活性变化对反应器出料组成、温度、换热网络最小公用工程用量以及单位产品平均能耗的影响规律,确定了催化剂的最佳再生活性为0.8,最佳再生周期约为4.5天。优化后,单位产品平均生产能耗可降低41.5%。
A general integration model of reactor and heat exchanger network(HEN)considering catalyst deactivation was proposed to study the effect of catalyst deactivation and optimize the catalyst regeneration cycle of the olefin catalytic cracking unit.The reactor-HEN coupling integration model was constructed based on reaction kinetics,catalyst deactivation kinetics,integration principle of HEN,and shift laws of utilities.The variations of reactor parameters and target energy consumption of the HEN with catalyst deactivation could be determined,and the catalyst¢s regeneration cycle could be optimized with the product¢s average energy consumption as an evaluation index.The influence of catalyst activity in the catalytic cracking unit of olefins on reactor effluent¢s composition and temperature,minimum utilities of HEN,and average energy consumption per unit product was analyzed.The optimal regeneration activity of the catalyst was determined to be 0.8,and the optimal regeneration cycle was about 4.5 days.After optimization,the average production energy consumption per unit product can be reduced by 41.5%.
作者
赵丽文
刘桂莲
张早校
ZHAO Liwen;LIU Guilian;ZHANG Zaoxiao(School of Chemical Engineering and Technology,Xi¢an Jiaotong University,Xi¢an 710049,China)
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2023年第5期813-823,共11页
Journal of Chemical Engineering of Chinese Universities
基金
国家自然科学基金(22078259,21736008)。
关键词
C4+烯烃裂解
换热网络
催化剂失活
再生周期
优化
反应器
C4+olefin catalytic cracking
heat exchanger network
catalyst deactivation
regeneration cycle
optimization
reactor
