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

Xiuhui Huang; Zeqiu Li; Ying Tian

doi:10.1016/j.cjche.2017.10.030

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

Selected Papers from the Chinese Process Systems Engineering Annual Meeting 2017 | Updated：2026-01-06

- Process optimization of an industrial acetic acid dehydration progress via heterogeneous azeotropic distillation
- Chinese Journal of Chemical Engineering Vol. 26, Issue 8, Pages: 1631-1643(2018)
- Affiliations：
  
  2 School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology,Shanghai,China,200093
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2017.10.030
  CLC：
- Published：2018
- Accepted：
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heterogeneous azeotropic distillation[J]. Chinese Journal of Chemical Engineering, 2018, 26(8): 1631-1643.
DOI：

heterogeneous azeotropic distillation[J]. Chinese Journal of Chemical Engineering, 2018, 26(8): 1631-1643. DOI： 10.1016/j.cjche.2017.10.030.

摘要

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 Q

Total

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 Q

Total

the whole process can reach the minimum value of 128.32×10

kJ·h

-1

when the temperature of decanter is 352.35 K

and it can save 5.94×10

kJ·h

-1

about 2.56 t·h

-1

low-pressure saturated vapor.

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