摘要
采用Aspen Plus软件对以乙二醇为萃取剂的萃取精馏工艺精制含水乙腈的过程进行了模拟优化。以全流程的年度总费用(TAC)最小为目标,对各项设计变量如全塔塔板数、进料位置和回流比等进行了优化,得到最佳工艺参数。以降低能耗费用为目的,在萃取剂再生塔提馏段增设中间再沸器,采用费用较低的中压蒸汽作为加热介质,考察了中间再沸器的位置以及抽出量对TAC的影响。结果表明:中间再沸器设置在第9~10块塔板之间时,全流程的TAC最小,当处理规模为100kmol/h时,相比无中间再沸器的普通萃取精馏的TAC节约7.61×10~4$/a。
The process of extractive distillation of acetonitrile aqueous solution with ethylene glycol as extractant was simulated and optimized through Aspen Plus. Taking the minimum total annual cost(TAC) of the whole process as the goal, the design variables, such as the number of trays, feed position and reflux ratio, were optimized, and the optimal process parameters were obtained. In order to reduce the cost of energy consumption, an intermediate reboiler was added in the stripper section of the extractant regeneration column, and medium pressure steam was used as heating medium. The influence of the position of the intermediate reboiler and the extraction amount on TAC was investigated. The results show that when the intermediate reboiler is set between the 9 th and the 10 th trays, the TAC of the whole process is the minimum. When the treatment scale is 100 kmol/h,compared with the common extractive distillation process without intermediate reboiler, the TAC of the improved process can be saved by 7.61×10~4$/a.
作者
王克良
李静
连明磊
范佳鑫
杜廷召
WANG Ke-liang;LI Jing;LIAN Ming-lei;FAN Jia-xin;DU Ting-zhao(College of Chemistry and Materials Engineering,Liupanshui Normal University,Liupanshui 553000,China;North China Company,China Petroleum Engineering and Construction Corporation,Renqiu 062550,China)
出处
《天然气化工—C1化学与化工》
CAS
CSCD
北大核心
2020年第2期66-70,共5页
Natural Gas Chemical Industry
基金
贵州省教育厅青年科技人才项目(黔教合KY字[2019]137)
贵州省教育厅教学内容与课程体系改革项目(2019148)
卓越工程师培养计划(LPSSYzyjypyjh201702)
校级教改项目(LPSSYjg201910)
校级科技创新团队项目(LPSSYKJTD201908)
贵州省教育厅特色重点实验室项目([2011]278)。
关键词
萃取精馏
热集成
乙腈
水
中间再沸器
extractive distillation
heat-integration
acetonitrile
water
intermediate reboiler
