Economic and Risk Analyses of an Industrial N,N-Dimethylformamide Recovery Process
Bin Shi
Wuhan University of Technology, Department of Chemical Engineering, 430070 Wuhan, China
Search for more papers by this authorXiao Xu He
Wuhan University of Technology, Department of Chemical Engineering, 430070 Wuhan, China
Search for more papers by this authorCorresponding Author
Wei Wu
Wuhan University of Technology, Department of Chemical Engineering, 430070 Wuhan, China
National Cheng Kung University, Department of Chemical Engineering, 70101 Tainan, Taiwan
Correspondence: Wei Wu ([email protected]), National Cheng Kung University, Department of Chemical Engineering, Tainan 70101, Taiwan.Search for more papers by this authorChu Li Hsien
National Cheng Kung University, Department of Chemical Engineering, 70101 Tainan, Taiwan
Search for more papers by this authorBin Shi
Wuhan University of Technology, Department of Chemical Engineering, 430070 Wuhan, China
Search for more papers by this authorXiao Xu He
Wuhan University of Technology, Department of Chemical Engineering, 430070 Wuhan, China
Search for more papers by this authorCorresponding Author
Wei Wu
Wuhan University of Technology, Department of Chemical Engineering, 430070 Wuhan, China
National Cheng Kung University, Department of Chemical Engineering, 70101 Tainan, Taiwan
Correspondence: Wei Wu ([email protected]), National Cheng Kung University, Department of Chemical Engineering, Tainan 70101, Taiwan.Search for more papers by this authorChu Li Hsien
National Cheng Kung University, Department of Chemical Engineering, 70101 Tainan, Taiwan
Search for more papers by this authorAbstract
The industrial N,N-dimethylformamide (DMF) recovery plant is usually based on a two-column sequence (TCS) and the capacity of the wastewater treatment process is larger than 2000 kg h−1. Here, a dividing-wall column (DWC)-based DMF recovery plant is proposed. The DWC avoids the remixing effect and reduces the utility duties by about 18.1 % and the CO2 emissions by 15.2 %, compared to the TCS. The DWC effectively decreases the total annual cost by 3.4 % compared to that of the TCS and achieves a profitability index of 2.19 and an internal rate of return of 40.45 %. By Monte Carlo risk analysis, the DWC can increase the chance of earning the profit by up to 16 % compared to the TCS.
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