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Energy, Exergy, Economic, and Environmental Analysis of the Vapor Recompression-Assisted Liquid-Only Transfer Extractive Dividing Wall Column for Separating Minimum-Boiling Point Azeotropes
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2024-04-08 , DOI: 10.1021/acs.iecr.4c00218 Chenghao Xing 1 , Zhongwen Song 1 , Yanyang Wu 1 , Bin Wu 1 , Kui Chen 1 , Lijun Ji 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2024-04-08 , DOI: 10.1021/acs.iecr.4c00218 Chenghao Xing 1 , Zhongwen Song 1 , Yanyang Wu 1 , Bin Wu 1 , Kui Chen 1 , Lijun Ji 1
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The introduction of a dividing wall column into extractive distillation can help reduce energy consumption, while bringing about the difficulty in controlling the vapor split ratio below the vertical partition as well. A liquid-only transfer distillation wall column, which has nothing to do with the vapor split ratio, has been applied for the separation of a minimum-boiling point azeotrope in this work. Meanwhile, both vapor recompression (VRC) and intermediate reboiler (IR) technologies are applied in the liquid-only transfer extractive distillation wall column (LEDWC) for further decreasing energy consumption and the total annual cost. Consequently, four novel configurations are optimized for a minimum total annual cost. All of the processes are evaluated by energy consumption, lost work, economics, and gas emission. It shows that the (RE-)VRC-IR-LEDWC-CR exhibits the best performance. Moreover, it is economic if all the vapor overhead is used for VRC, which reduces the energy consumption, lost work, total annual cost, and gas emission by 39, 31, 25, and 39%, respectively, compared with conventional extractive distillation sequences.
中文翻译：
用于分离最低沸点共沸物的蒸汽再压缩辅助纯液体转移萃取分隔壁塔的能源、火用、经济和环境分析
在萃取精馏中引入间壁塔有助于降低能耗，但同时也带来了垂直分区以下蒸气分流比控制的困难。在这项工作中，与蒸气分流比无关的纯液体转移蒸馏壁塔已被应用于最低沸点共沸物的分离。同时，蒸汽再压缩（VRC）和中间再沸器（IR）技术同时应用于纯液体转移萃取精馏壁塔（LEDWC），进一步降低能耗和年度总成本。因此，四种新颖的配置经过优化，可实现最低的年度总成本。所有流程均通过能源消耗、损失的工作、经济性和气体排放进行评估。结果表明，(RE-)VRC-IR-LEDWC-CR 表现出最佳性能。此外，如果所有塔顶蒸气用于 VRC，也是经济的，与传统萃取精馏序列相比，能耗、功损失、年度总成本和气体排放分别减少 39%、31%、25% 和 39% 。
更新日期：2024-04-08
中文翻译：
用于分离最低沸点共沸物的蒸汽再压缩辅助纯液体转移萃取分隔壁塔的能源、火用、经济和环境分析
在萃取精馏中引入间壁塔有助于降低能耗，但同时也带来了垂直分区以下蒸气分流比控制的困难。在这项工作中，与蒸气分流比无关的纯液体转移蒸馏壁塔已被应用于最低沸点共沸物的分离。同时，蒸汽再压缩（VRC）和中间再沸器（IR）技术同时应用于纯液体转移萃取精馏壁塔（LEDWC），进一步降低能耗和年度总成本。因此，四种新颖的配置经过优化，可实现最低的年度总成本。所有流程均通过能源消耗、损失的工作、经济性和气体排放进行评估。结果表明，(RE-)VRC-IR-LEDWC-CR 表现出最佳性能。此外，如果所有塔顶蒸气用于 VRC，也是经济的，与传统萃取精馏序列相比，能耗、功损失、年度总成本和气体排放分别减少 39%、31%、25% 和 39% 。
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