Efficient recovery of benzene and n-propanol from wastewater via vapor recompression assisted extractive distillation based on techno-economic and environmental analysis
| Autor: | Yinglong Wang, Zhengrun Chen, Lei Wang, Huiyuan Li, Yixin Ma, Zhaoyou Zhu, Peizhe Cui, Dong Yao, Zhaoyuan Ma, Jiangang Zhao, Jun Gao |
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| Rok vydání: | 2021 |
| Předmět: |
Exergy
021110 strategic defence & security studies Environmental Engineering Environmental analysis Waste management business.industry General Chemical Engineering 0211 other engineering and technologies 02 engineering and technology Chemical industry 010501 environmental sciences 01 natural sciences law.invention Wastewater law Azeotrope Exergy efficiency Environmental Chemistry Environmental science Extractive distillation Safety Risk Reliability and Quality business Distillation 0105 earth and related environmental sciences |
| Zdroj: | Process Safety and Environmental Protection. 148:462-472 |
| ISSN: | 0957-5820 |
| DOI: | 10.1016/j.psep.2020.10.033 |
| Popis: | N-propanol and benzene are important chemical organic compounds, which widely exist in wastewater of chemical industry, medicine and other fields. Because they form azeotrope with water, extractive distillation was used to separate them. In order to increase the efficiency of energy utilization, vapor recompression technology was added on the basis of extractive distillation. On the basis of vapor recompression assisted extractive distillation, energy integration was carried out according to pinch technology, and the optimal energy utilization method was found. The exergy loss and gas emission of each process were studied and analyzed. The results show that the vapor recompression assisted distillation process with feed preheating can reduce the heat duty and gas emissions, and improve exergy efficiency and economic performance. Therefore, the vapor recompression assisted distillation process with feed preheating can effectively treat the wastewater containing benzene / n-propanol. It has the advantages of low cost, energy saving and environmental protection, which is of great significance to the development of environmental protection industry. |
| Databáze: | OpenAIRE |
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