For separating some specific four component mixtures into four products
the four-product dividing wall column (FPDWC) with two partition walls can provide the same utility consumption with the extended Petlyuk configuration
although with structure simplicity. However
the reluctance to implement this kind of four product dividing wall column industrially also consists in the two uncontrollable vapor splits associated with it. The vapor split ratios are set at the design stage and might not be the optimal value for changed feed composition
thus minimum energy consumption could not be ensured. In the present work
a sequential iterative optimization approach was initially employed to determine the parameters of cost-effective FPDWC. Then the effect of maintaining the vapor split ratios at their nominal value on the energy penalty was investigated for the FPDWC with two partition walls
in case of feed composition disturbance. The result shows that no more than +2% above the optimal energy requirements could be ensured for 20% feed composition disturbances
which is encouraging for industrial implementation.
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Related Author
Haotian Zheng
Zhixi Zhang
Guangyan Wang
Yatao Wang
Jun Liang
Weiyi Su
Yuqi Hu
Xiong Yu
Related Institution
Coal Chemical R&D Center of Kailuan Group
School of Information Engineering, Tianjin University of Commerce
School of Chemical Engineering and Technology, National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources Utilization, Hebei University of Technology
Engineering Research Center of Preparation Technology of Ultra-Pure Chemicals for Integrated Circuit, Ministry of Education, Beijing University of Chemical Technology
State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology