Dynamic control analysis of interconnected pressure-swing distillation process with and without heat integration for separating azeotrope

2020 ◽  
Author(s):  
Jingwei Yang ◽  
Zhengkun Hou ◽  
Yao Dai ◽  
Kang Ma ◽  
Peizhe Cui ◽  
...  
Keyword(s):  
Dynamic Control ◽  
Heat Integration ◽  
Control Analysis ◽  
Distillation Process ◽  
Pressure Swing ◽  
Pressure Swing Distillation

Heat Integration and Control of a Triple-Column Pressure-Swing Distillation Process

2017 ◽  
Vol 56 (8) ◽  
pp. 2150-2167 ◽  
Author(s):  
Zhaoyou Zhu ◽  
Dongfang Xu ◽  
Hui Jia ◽  
Yongteng Zhao ◽  
Yinglong Wang
Keyword(s):  
Heat Integration ◽  
Distillation Process ◽  
Pressure Swing ◽  
Pressure Swing Distillation ◽  
Column Pressure ◽  
And Control

scholarly journals Process Simulation of the Separation of Aqueous Acetonitrile Solution by Pressure Swing Distillation

Processes ◽  
2019 ◽  
Vol 7 (7) ◽  
pp. 409 ◽  
Author(s):  
Jing Li ◽  
Keliang Wang ◽  
Minglei Lian ◽  
Zhi Li ◽  
Tingzhao Du
Keyword(s):  
Acetonitrile Solution ◽  
Optimum Process ◽  
Total Annual Cost ◽  
Heat Integration ◽  
Reflux Ratio ◽  
Water Mixture ◽  
Aqueous Acetonitrile ◽  
Design Variables ◽  
Pressure Swing ◽  
Pressure Swing Distillation

The separation of aqueous acetonitrile solution by pressure swing distillation (PSD) was simulated and optimized through Aspen Plus software. The distillation sequence of the low pressure column (LPC) and high pressure column (HPC) was determined with a phase diagram. The pressures of the two columns were set to 1 and 4 atm, respectively. Total annual cost (TAC) was considered as the objective function, and design variables, such as the tray number, the reflux ratio, and the feeding position, were optimized. The optimum process parameters were obtained. For the reduction of energy consumption, the PSD with full-heat integration was designed. The TAC of this method is lower by 32.39% of that of the PSD without heat integration. Therefore, it is more economical to separate acetonitrile and water mixture by PSD with full-heat integration, which provides technical support for the separation design of such azeotropes.

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