化学工程Issue(6)：69-73,5.DOI:10.3969/j.issn.1005-9954.2014.06.015
双效精馏精制甲缩醛的过程模拟
Simulation of double-effect distillation separation of methylal
摘要
Abstract
In the process of manufacturing highly-concentrated aqueous formaldehyde solution by methylal oxidation, when concentrated methylal is distillated,it is easy to form a methanol-methylal azeotropic system,and difficult to obtain high-purity methylal.The methanol-methylal azeotropic composition changes with pressure,thus many existing processes use swing-pressure distillation (using high-pressure column)to separate methylal.There are many disadvantages,such as high energy consumption and low efficiency,which result in great energy loss.To improve the efficiency of the tower,the process of separating methylal was improved by combining swing-pressure distillation with double-effect distillation.The simulation results are as follows:the high pressure column is built up by 27 theoretical plates,the pressure is 1 000 kPa,the energy saving rates of the bottom reboiler in the double-effect distillation process is 54.97%,and the energy saving rates of the overhead condenser is 37.79%.关键词
甲缩醛/Aspen Plus模拟/双效精馏Key words
methylal/Aspen Plus simulation/double-effect distillation分类
化学化工引用本文复制引用
段继海,任晓晗,王伟文..双效精馏精制甲缩醛的过程模拟[J].化学工程,2014,(6):69-73,5.基金项目
国家自然科学基金资助项目（21276132）；山东省博士基金项目 （）
