Key Words:VAPOR-LIQUID-EQUILIBRIA; EXTRACTIVE DISTILLATION; MIXED ENTRAINER; TERNARY MIXTURE; IONIC LIQUIDS; ENERGY; ETHANOL; DESIGN; SYSTEM; AZEOTROPES

Abstract:In this paper, heat integration and dynamic control of reactive pressure-swing distillation (RPSD) for separating tetrahydrofuran/ethanol/water was investigated from the aspects of energy consumption, environmental protection and practical applications. By exploring the heat exchange between separating tetrahydrofuran and ethanol distillation columns, the full heat integration process (FHI) was designed. Robust control of heat and non-heat integrated processes was realized based on the dual temperature control structure. All processes were resistant to & PLUSMN;20% feed flow and composition disturbances. Finally, these processes were compared from three aspects: economy, environment and dynamic performance. The results show that compared with the non-heat integration process, the FHI process can reduce the total annual cost by 24.14%, the CO2 emission by 20.21% and the SO2 and NO emission by 34.38%, meanwhile, having the best dynamic performance. This study is valuable and instructive in promoting the integrated optimal and control design of the RPSD process.

Volume:191

Issue:

Translation or Not:no