Batch extractive distillation was studied in a column with amiddle vessel. The process was simulated by a constant holdup modeland solved by two point implicit method. Acetone and methanol mixturewas separated in such...Batch extractive distillation was studied in a column with amiddle vessel. The process was simulated by a constant holdup modeland solved by two point implicit method. Acetone and methanol mixturewas separated in such a setup using water as solvent. The simulationagrees well with experimental results. The experimental andsimulation results show that the solvent at the bottom and theproduct at the top of the column can be withdrawn simulataneously fora long period of time. It needs more time for the solvent to reachhigh purity than that required for the more volatile component toreach high purity, so that the time to withdraw solvent from thebottom is delayed.展开更多
使用Aspen Plus和Aspen Plus Dynamics模拟了用于分离正己烷/正庚烷/正辛烷三元体系的中间储罐间歇精馏过程。首先在稳态模拟中按照连续精馏流程的模拟方法确定稳态模拟流程,在动态模拟中关闭进料和产品出口阀门,来实现间歇精馏在Aspen ...使用Aspen Plus和Aspen Plus Dynamics模拟了用于分离正己烷/正庚烷/正辛烷三元体系的中间储罐间歇精馏过程。首先在稳态模拟中按照连续精馏流程的模拟方法确定稳态模拟流程,在动态模拟中关闭进料和产品出口阀门,来实现间歇精馏在Aspen Plus和Aspen Plus Dynamics中的模拟。在Aspen Plus Dynamics中研究带有高选择器的组成控制结构和温度控制结构。两种控制结构都能使产品纯度达到分离要求。结果显示:就产品纯度稳定性而言,带有高选择器的温度控制结构相比组成控制结构有更好的控制性能。展开更多
文摘Batch extractive distillation was studied in a column with amiddle vessel. The process was simulated by a constant holdup modeland solved by two point implicit method. Acetone and methanol mixturewas separated in such a setup using water as solvent. The simulationagrees well with experimental results. The experimental andsimulation results show that the solvent at the bottom and theproduct at the top of the column can be withdrawn simulataneously fora long period of time. It needs more time for the solvent to reachhigh purity than that required for the more volatile component toreach high purity, so that the time to withdraw solvent from thebottom is delayed.
文摘使用Aspen Plus和Aspen Plus Dynamics模拟了用于分离正己烷/正庚烷/正辛烷三元体系的中间储罐间歇精馏过程。首先在稳态模拟中按照连续精馏流程的模拟方法确定稳态模拟流程,在动态模拟中关闭进料和产品出口阀门,来实现间歇精馏在Aspen Plus和Aspen Plus Dynamics中的模拟。在Aspen Plus Dynamics中研究带有高选择器的组成控制结构和温度控制结构。两种控制结构都能使产品纯度达到分离要求。结果显示:就产品纯度稳定性而言,带有高选择器的温度控制结构相比组成控制结构有更好的控制性能。
