Development of a Dynamic Modeling Approach to Simulate a Segmented Distillation Column for Flexible Operation

The need for flexible process equipment has increased over the past decade in the chemical industry. However, process equipment such as distillation columns have limitations that significantly restrict flexible operation. We investigate a segmented tray column designed to allow flexible operation. T...

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Bibliographic Details
Published inChemEngineering Vol. 5; no. 4; p. 66
Main Authors Bruns, Bastian, Fasel, Henrik, Grünewald, Marcus, Riese, Julia
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.12.2021
Subjects
Chemical engineering
Chemical industry
column design
distillation
Distillation equipment
Dynamic models
dynamic simulation
Equilibrium
Flexibility
Segments
Separation
Simulation
start-up
Trays
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Summary:The need for flexible process equipment has increased over the past decade in the chemical industry. However, process equipment such as distillation columns have limitations that significantly restrict flexible operation. We investigate a segmented tray column designed to allow flexible operation. The design consists of radial trays connected at the downcomer of each tray. Each segment can be operated separately, but depending on the capacity of the feed stream, additional segments can be activated or deactivated. The connection between the trays aims to transfer liquid from one stationary segment to the adjacent inactive segment, thereby reducing the time required for the start-up process. In a case study on the separation of methanol and water, we perform dynamic simulations to assess the reduction in the start-up time of inactive segments. The results confirm the advantages over standard tray designs. The segmented distillation column is a step towards improving the flexibility of separation operations.
ISSN:2305-7084
2305-7084
DOI:10.3390/chemengineering5040066