Can simple side stream configurations compete with fully thermally coupled dividing wall columns?

It is well known that thermal coupling of distillation columns can substantially decrease the energy requirements of distillation processes, which is confirmed by several hundred industrial implementations of dividing wall columns. However, the respective vapor splits have to be properly designed and require consistent hydrodynamics in the adjacent column sections. These limitations can be overcome by transformation of the thermal coupling to a side stream configuration, which adds a degree of freedom for operation of the process and allows the columns to be operated at different pressures. The current study investigates energy requirements and operating costs of single side stream configurations thermodynamically equivalent to side-rectifier and side-stripper columns in comparison to fully thermally coupled dividing wall columns and heat-integrated configurations. While side-stream configurations provide an interesting retrofit option and are competitive to fully-coupled dividing wall columns for certain ranges of feed compositions, they can outperform them significantly exploiting additional heat integration.

Subjects

Dividing Wall Column

Thermal Coupling

Liquid Only Transfer

Heat Integration

Shortcut Modeling

DDC Class

600: Technik

620: Ingenieurwissenschaften

Funding(s)

Calls4Transfer: Experimentelle Validierung innovativer Verschaltungskonzepte von Rektifikationskolonnen zur Steigerung der Energieeffizienz

Lizenz

http://rightsstatements.org/vocab/InC/1.0/

Name

can_simple_side_stream_configurations_compete_with_fully_thermally_coupled_dividing_wall_columns_2022_adami.pdf

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1.57 MB

Format

Adobe PDF

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Can simple side stream configurations compete with fully thermally coupled dividing wall columns?

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