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Indexed by:会议论文

Date of Publication:2011-10-16

Included Journals:EI、Scopus

Abstract:This paper aims at developing a systematic methodology to optimize operating cost and capital cost of batch mass exchange networks (MEN) in a simultaneous manner. Specifically, the traditional state space superstructure is divided into several interconnected subsystems through the property-based mixing/splitting rules, to capture the potential connecting and matching structures. The proposed superstructure can easily handle non-isocomposition mixing/splitting as well as flexible storage locations both in the component and time dimensions. Then, a mixed-integer nonlinear program (MINLP) is first formulated to minimize the total annual cost (TAC), in which the balance between operating cost (utility cost) and capital cost (investment on operating units and storage tanks) can be achieved in one step. Furthermore, the multi-purpose units and parallel operations are also introduced not only to enhance the flexibility of batch process production, but also to make a better use of all the equipment and stream resources in both space and time dimensions. Finally, the coke oven gases (COG) separating problem is presented to demonstrate the applicability and superiority the proposed approach for batch MEN design. It can be found that the TAC can be reduced by 5-70% compared with that of the previous works, and another over 10% can be decreased by using the multi-purpose units and parallel operations.