摘要
以乙酸甲酯酯转换体系为例提出了一种反应精馏隔壁塔的设计和优化方法,应用该方法可将常规双塔反应精馏序列转化为反应精馏隔壁塔并保证各操作参数的最优值。首先通过在反应精馏塔与甲醇塔之间交换汽液相物流来实现反应精馏隔壁塔的简捷设计;然后利用Aspen Plus模拟软件,对常规反应精馏序列和反应精馏隔壁塔进行了模拟分析;最终以2个产品的纯度以及2个再沸器总负荷为目标函数进行了系统优化。结果表明:与常规反应精馏序列相比,反应精馏隔壁塔不但可以节能15.19%,提高热力学效率0.35%,而且能大幅度地减少CO2排放量。研究表明:反应隔壁精馏塔不但在乙酸甲酯酯转换体系上存在很大优势,而且在节能减排和减少设备投资上具有较大的潜质。
The design and optimization procedures of a reactive dividing wall column（RDWC） sequence for methyl acetate transesterification system were investigated.The procedures can be applied to retrofit a conventional two-column reactive distillation sequence to a RDWC sequence and guarantee the optimal values of the design variables.Firstly,the streams of liquid and vapor between reactive distillation column and methanol separation column were exchanged for the shortcut design of the reactive distillation column.Then both the conventional reactive distillation sequence and RDWC were simulated by using Aspen Plus.Finally,the system was optimized by taking the purity of two products and the total duty of two reboilers as objective functions.The results show that compared with the conventional reactive distillation sequence（CRDS）,RDWC can achieve an energy saving of 15.19%,the thermodynamic efficiency is improved by 0.35% and CO2 emissions is cut down greatly.Therefore,beside the advantage on the methyl acetate transesterification system,RDWC has potential for energy conservation,pollution reduction and the equipment investment reduction.
出处
《化学工程》
CAS
CSCD
北大核心
2011年第7期1-4,17,共5页
Chemical Engineering(China)
基金
中央高校基本科研业务费专项资金资助项目(27R0904075A)
山东省优秀中青年科学家科研奖励基金项目(BS2010NJ023)
关键词
反应精馏隔壁塔
节能
热力学效率
CO2排放
reactive dividing wall columns
energy saving
thermodynamic efficiency
CO2 emission
