SCI和EI收录∣中国化工学会会刊

Chin.J.Chem.Eng. ›› 2018, Vol. 26 ›› Issue (8): 1631-1643.DOI: 10.1016/j.cjche.2017.10.030

• Selected Papers from the Chinese Process Systems Engineering Annual Meeting 2017 • Previous Articles     Next Articles

Process optimization of an industrial acetic acid dehydration progress via heterogeneous azeotropic distillation

Xiuhui Huang1, Zeqiu Li1, Ying Tian2,   

  1. 1 School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;
    2 School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
  • Received:2017-08-28 Online:2018-09-21 Published:2018-08-28
  • Contact: Xiuhui Huang,E-mail addresses:hxh@usst.edu.cn;Ying Tian,E-mail addresses:tianying009@sina.com
  • Supported by:

    Supported by Shanghai University Youth Teacher Training Program (ZZsl15002) and Shanghai Sailing Program (17YF1413100 and 17YF1428300).

Process optimization of an industrial acetic acid dehydration progress via heterogeneous azeotropic distillation

Xiuhui Huang1, Zeqiu Li1, Ying Tian2,   

  1. 1 School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;
    2 School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
  • 通讯作者: Xiuhui Huang,E-mail addresses:hxh@usst.edu.cn;Ying Tian,E-mail addresses:tianying009@sina.com
  • 基金资助:

    Supported by Shanghai University Youth Teacher Training Program (ZZsl15002) and Shanghai Sailing Program (17YF1413100 and 17YF1428300).

Abstract: The simulated process model of the HAc dehydration process under actual overloaded condition was conducted by amending the model of standard condition in our previous work using the process data collected from actual production. Based on the actual process model, the operation optimization analysis of each plant (HAc dehydration column, decanter and NPA recycle column) was conducted using Residue Curve Maps (RCMs), sensitivity analysis and software optimization module. Based on the optimized parameters, the influence of feed impurity MA and the temperature of decanter on the separating effect and energy consumption of the whole process were analyzed. Then the whole process operation optimizing strategy was proposed with the objective that the total reboiler duty QTotal of C-1 and C-3 reaches the minimum value, keeping C-1 and C-3 at their optimized separation parameters obtained above, connecting all the broken recycle and connection streams, and using the temperature of D-1 as operation variable. The optimization result shows that the total reboiler duty QTotal of the whole process can reach the minimum value of 128.32×106 kJ·h-1 when the temperature of decanter is 352.35 K, and it can save 5.94×106 kJ·h-1, about 2.56 t·h-1 low-pressure saturated vapor.

Key words: Acetic acid dehydration, Azeotropic distillation, Process simulation, Operation optimization

摘要: The simulated process model of the HAc dehydration process under actual overloaded condition was conducted by amending the model of standard condition in our previous work using the process data collected from actual production. Based on the actual process model, the operation optimization analysis of each plant (HAc dehydration column, decanter and NPA recycle column) was conducted using Residue Curve Maps (RCMs), sensitivity analysis and software optimization module. Based on the optimized parameters, the influence of feed impurity MA and the temperature of decanter on the separating effect and energy consumption of the whole process were analyzed. Then the whole process operation optimizing strategy was proposed with the objective that the total reboiler duty QTotal of C-1 and C-3 reaches the minimum value, keeping C-1 and C-3 at their optimized separation parameters obtained above, connecting all the broken recycle and connection streams, and using the temperature of D-1 as operation variable. The optimization result shows that the total reboiler duty QTotal of the whole process can reach the minimum value of 128.32×106 kJ·h-1 when the temperature of decanter is 352.35 K, and it can save 5.94×106 kJ·h-1, about 2.56 t·h-1 low-pressure saturated vapor.

关键词: Acetic acid dehydration, Azeotropic distillation, Process simulation, Operation optimization