Abstract
Commercial design programs do not provide a ready-to-use process simulation of tray-by-tray heat-integrated distillation columns, so the computation of the columns using the programs is difficult due to their convergence problem. An approximate procedure for the design of the internally heat-integrated distillation column (HIDiC) is proposed here, and its performance of the design and cost evaluation is demonstrated with two example processes. The approximate design procedure eliminates the artificial heat exchangers and in-tray streams required in the design with the commercial programs, and therefore no information of the exchangers and streams is necessary except the amount of the in-tray heat transfer rate. The economic evaluation indicates that a reduction of the total annual cost of 8.1% is possible with benzene-toluene process and that 59.3% is yielded with the propylene-propane process. The results also demonstrate that the HIDiC is especially efficient for the tight separation system.
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Kim, Y.H. Approximate design and cost evaluation of internally heat-integrated distillation columns (HIDiCs). Korean J. Chem. Eng. 29, 1004–1009 (2012). https://doi.org/10.1007/s11814-011-0288-x
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DOI: https://doi.org/10.1007/s11814-011-0288-x