Synthesis of Heat Integrated Distillation Systems with Internal Heat Exchange
A systematic procedure that can obtain a distillation system structure with minimum energy consumption is developed for the separation problem of multi-component mixtures. In the proposed procedure, heat exchange among the tray sections is considered in addition to that between the reboiler and condenser. By expanding the possibility of heat integration, extra reduction of energy consumption is expected. The optimal synthesis problem is formulated as a mixed integer liner programming (MILP) problem. The concept of superstructure is used to express all possible configurations of the process. The transshipment model, where heat sinks and heat sources are assigned to temperature intervals, is used to express the heat balance in the process. The proposed method was applied to the separation problem of a five-component mixture. The results of the example problems show that a more efficient energy saving separation structure can be obtained by considering heat exchange between stripping and rectifying sections than the case where only the heat exchange between reboiler and condenser is permitted.
Heat integration Distillation Optimal synthesis Mixed integer linear programming Energy saving
Takato Nakao Manabu Kano Shinji Hasebe
Department of Chemical Engineering,Kyoto University,Nishikyo-ku,Kyoto 615-8510,Japan
国际会议
西安
英文
2007-08-15（万方平台首次上网日期，不代表论文的发表时间）