CATEGORY: DIVIDING WALL COLUMN
Chemical Engineering and Processing: Process
Intensification, Volume 75, January 2014, Pages 48–57
Dividing
wall column for industrial multi purpose use
Daniel Staak (a), Thomas Grützner (a), Brian Schwegler (a), Detlef
Roederer (b)
a Lonza Chemical R&D, Visp, Switzerland
b Lonza Process and Project Engineering, Visp, Switzerland
Abstract
Because
dividing wall columns DWC demand higher efforts in equipment design and process
control they are typically used in continuously operated dedicated production
plants. No literature can be found where DWC are used in multi-purpose plants.
The distillation equipment in those plants, typically operated in batch mode,
has to show a high degree of flexibility – an attribute that hardly seems to
fit for dividing wall columns.
Authors describe the equipment design and the specific technical
solutions that had to be implemented in order to satisfy the harsh
specifications of multi-purpose production. They focus on the modelling and
simulation of the column and the control scheme that has been applied. They
offer a novel approach for setting up a flowsheet simulation that overcomes the
frequently occurring problems in convergence and enhances robustness of the
simulation.
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