(54e) Design of Batch Scheduling

Design of Batch
Scheduling

Design and scale-up of new batch processes presents a unique
set of challenges versus design of continuous processes. One key difference is
optimization of the time required for each process step.  Rules of thumb are
often used due to lack of data or tools. 

Improvements in dynamic simulation software have allowed for
more rigorous modeling of increasingly complex systems and scenarios. Modeling
of batch process steps in the design phase can highlight potential problem
areas such as heat balance limitations, short residence times, reversal of
flows, and pressure/flow dependencies. This allows for efficient optimization
of step scheduling using the latest dynamic simulation techniques. Examples of
batch designs are presented using CHEMCAD simulation software. A new method is
included for simplification of handling any number of process steps and control
elements.