摘要
基于前脱丙烷工艺的乙烯装置中不同类型的脱乙烷-乙烯精馏单元工艺流程,通过Aspen Plus软件对脱乙烷塔侧采流程及LECT流程的脱乙烷-乙烯精馏单元进行模拟,重点针对脱乙烷塔侧采流程的侧采位置、预采乙烯量、各塔进料位置进行优化。计算结果表明,相比LECT流程,脱乙烷塔侧采流程中脱乙烷塔的冷凝器负荷增加了3970 kW,但乙烯精馏塔及开式热泵系统的能耗显著降低,乙烯压缩机电耗降低2145 kW,同时乙烯精馏塔釜还可多回收-54℃冷量3484 kW,共降低脱乙烷-乙烯精馏单元电耗35.9%,节能效果显著。
This work briefly introduces the different types of deethane-ethylene distillation flowsheets for the front-end depropanization process in the ethylene plant.Both deethanizer with side draw process and LECT deethane-ethylene distillation process were simulated by Aspen Plus;after that,the side draw stage,the amount of pre-produced ethylene,and the feed stage of each column in deethanizer with side draw process were optimized based on the models.Compared with the LECT process,the calculation result shows that the condenser duty in the deethanizer with side draw is increased by 3970 kW,but the energy consumption of heat pump and C2 splitter is significantly reduced.The electricity consumption of the ethylene compressor is reduced by 2145 kW.In addition,3484 kW cooling duty(-54℃)could be recovered from the reboiler in the C2 splitter.The proposed process could reduce the electricity consumption of the deethane-ethylene distillation unit by 35.9%in total,which means a significant energy saving for the ethylene plant.
作者
谭明松
朱炜玄
邹雄
韩志忠
董宏光
王克峰
Tan Mingsong;Zhu Weixuan;Zou Xiong;Han Zhizhong;Dong Hongguang;Wang Kefeng(School of Chemical Engineering Dalian University of Technology,Dalian Liaoning 116024,China)
出处
《石油化工》
CAS
CSCD
北大核心
2020年第8期791-796,共6页
Petrochemical Technology
基金
国家自然科学基金项目(21276039)。
