重芳烃综合利用常规工艺与隔壁塔工艺对比分析  

Comparison analysis of conventional process and DWC process for comprehensive utilization of heavy aromatics

作　　者：候国新 杨扬[1] 朱炜玄 董宏光[1] 王克峰[1] HOU Guo-xin;YANG Yang;ZHU Wei-xuan;DONG Hong-guang;WANG Ke-feng(School of Chemical Engineering,Dalian University of Technology,Dalian 116033,China)

机构地区：[1]大连理工大学化工学院,辽宁大连116033

出　　处：《现代化工》2022年第5期224-228,232,共6页Modern Chemical Industry

基　　金：国家自然科学基金项目(21276039)

摘　　要：提出了一种新型隔壁塔两塔精馏工艺流程在重芳烃综合利用中的应用,并以某炼厂重芳烃为原料,研究了隔壁塔工艺中侧线采出位置、进料位置、气液分配量等操作参数的影响并对其进行了优化,最后在相同的产品指标下,对3种工艺进行了对比。结果表明,当产品指标要求较高且原料中甲乙苯占比较大时,传统三塔工艺不论在能耗还是设备投资方面都优于侧线采出四塔工艺;但隔壁塔工艺相比传统三塔工艺,再沸器负荷可减少2684 kW,节能占比约13%,总理论板数可减少40块。新型隔壁塔两塔流程既提高了热力学效率、降低能耗,又大幅降低设备投资,经济性优势明显。A new type of dividing wall column(DWC)process is proposed for the comprehensive utilization of heavy aromatic hydrocarbons.Heavy aromatics from a certain refinery is selected as raw material,the influences of operation parameters such as side-line production position,feed position and gas-liquid distribution in the DWC process are studied and optimized.On the premise of same product index,three processes are compared.Results show that if both the requirements to the product index and the concentration of methyl ethylbenzene in raw materials are higher,traditional three-column process is superior to side-line extraction four-column process in both energy consumption and equipment investment.Compared with traditional three-column process,the new DWC process can reduce 2,684 kW of load in reboiler,save energy by 13%,and reduce 40 pieces of total theoretical plates.The new DWC process improves thermodynamic efficiency,reduces energy consumption and greatly reduces equipment investment,showing an obvious economic advantage.

关 键 词：重芳烃 隔壁塔 优化 节能 经济性 

分 类 号：TE624[石油与天然气工程—油气加工工程]