萃取精馏的计算传质学模拟与实验验证

提出了萃取精馏过程模拟的计算传质学方法,并针对以N-甲基吡咯烷酮(NMP)为溶剂分离苯和噻吩的萃取精馏过程进行了模拟计算。在散堆填料实验塔内进行了相同的萃取精馏实验,得到了萃取精馏塔内浓度分布。将模拟计算结果与实验结果进行比较表明,提出的计算传质学方法能够有效预测萃取精馏塔内浓度和速度分布,为萃取精馏过程设计提供依据。

Computational mass transfer simulation of extractive distillation and its experimental confirmation

A computational mass transfer method for simulating extractive distillation process is proposed and applied to the simulation of an extractive distillation for the separation of benzene and thiophene mixture using N-methyl-2-pyrrolidone（NMP）as the extractive solvent. To testify the validity of the simulating method，experiment was performed under identical condition in a randomly packed column，in which the concentration distribution in the extractive distillation column was measured. The simulated results was found in agreement with the experimental measurement. It demonstrates that the proposed computational mass transfer method can be used to predict effectively the concentration and velocity profiles in an extractive distillation column.