乙酸甲酯外部环流隔离壁反应蒸馏塔的设计与比较

Design and comparison of methyl acetate external circulation dividing-wall reactive distillation column

选择了3种不同的外部环流设计并采用隔离壁蒸馏塔的拓扑结构。以乙酸和甲醇酯化反应生成乙酸甲酯和水反应体系为例,分别设计了底部-中部环流隔离壁反应蒸馏塔、中部-中部环流隔离壁反应蒸馏塔和双环流隔离壁反应蒸馏塔,并对其稳态性能进行了分析与比较。结果显示,双环流隔离壁反应蒸馏塔能够最大限度地强化内部物质和能量耦合,因而拥有最佳的稳态性能。

Three different external circulation arrangements are adopted and the topological structure of dividingwall distillation column is adopted.Taking the esterification of acetic acid and methanol as an illustrative example,three dividing-wall reactive distillation columns are designed,one with an external circulation from the bottom to the medium stage of the prefractionator,one with an external circulation from the medium stage of the main column to the medium stage of the prefractionator,and one with double external circulation. Their steady-state performances are analyzed and compared.Results show that the column designed with double external circulation can furthest reinforce integration of internal mass and energy,therefore it has the best steady-state performance among the three columns.