一种有效的双隔壁反应蒸馏塔的综合与设计策略

An effective strategy for synthesis and design of double dividing-wall reactive distillation column

提出了一种反应蒸馏过程强化原理,在反应和分离操作有效耦合的基础上进一步加强分离操作之间的耦合,得到一种有效的双隔壁反应蒸馏塔。该结构可显著提高过程中的能量利用效率。以理想四元反应和碳酸二甲酯与乙醇之间的酯交换反应为例对所提出的结构进行评价分析,结果表明,与常规和单隔壁结构相比,这种双隔壁反应蒸馏结构能有效降低能耗。此外,基于反应系统的性质对节能效果的影响进行了研究,结果表明,该双隔壁反应蒸馏塔适用于难反应与难分离系统,且具有优越稳态性能。

A process intensification principle for reactive distillation is proposed.On the basis of sufficient coupling between reaction and separation operations,an effective double dividing-wall reactive distillation column(R-DDWDC)is obtained through further enhancing the coupling between separation operations.The double dividing-wall structure can improve the energy efficiency in reactive distillation process significantly.Both the ideal quaternary reaction system and the transesterification between dimethyl carbonate and ethanol are used to evaluate the R-DDWDC proposed.The obtained results show that the proposed R-DDWDC can reduce energy consumption effectively.In addition,the parameters analysis is further carried out with reference to the reactive system properties,and the results show that this R-DDWDC is suitable for systems with difficulty in reaction and separation,and also has superior steady-state performance.