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首页> 外文期刊>Energy Conversion & Management >Energy optimization and comparative study of pre- and post-fractionator extractive dividing wall column for the CO_2-ethane azeotropic process
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Energy optimization and comparative study of pre- and post-fractionator extractive dividing wall column for the CO_2-ethane azeotropic process

机译：分馏塔前后分馏塔CO_2-乙烷共沸过程的能量优化与对比研究

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摘要

Two possible extractive dividing-wall column (DWC) arrangements are explored to find the potential benefits derived from thermally coupled distillations in separation of a mixture including the C02-ethane azeotrope with a low boiling point. It is shown that the process including pre-fractionator in the DWC design in its optimized state leads to 51.6% reduction in total duties in comparison with the conventional process. Furthermore, a comparison between conventional extractive distillation columns and the new DWC process is made in terms of cost estimation, CO_2 removal efficiency and CO_2 emission reduction. Remarkable, the results clearly show that DWC process is interesting/feasible and the novel proposed DWC alternative reduces the steam requirements by 41% and the equipment costs by 31%.
机译：研究了两种可能的萃取式分隔壁塔（DWC）装置，以发现在分离包括低沸点的二氧化碳-乙烷共沸物的混合物时，从热耦合蒸馏中获得的潜在益处。结果表明，与传统工艺相比，在DWC设计中包括处于最佳状态的预分馏器的工艺可减少总负荷的51.6％。此外，在成本估算，CO 2去除效率和CO 2排放减少方面，对常规萃取蒸馏塔和新的DWC工艺进行了比较。值得注意的是，结果清楚地表明，DWC工艺是有趣/可行的，提出的DWC替代方案可将蒸汽需求量降低41％，设备成本降低31％。

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