4. Function setting
If all parameters remained perfectly fixed, control would be useless; if they all varied at the same time and independently, control would become impossible. We must therefore strive to keep as many parameters as possible constant, and we'll have enough to do with those whose variations we can't control.
4.1 Flow rates
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Column feed rates should be kept constant wherever possible. A flow regulator with recorder and totalizer should be used, so that the daily quantities treated can be easily ascertained.
If the feed is distillate or raffinate from another column, there's no way to regulate the flow rate to a constant value.
The solvent flow rate in absorption...
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Unit operations. Chemical reaction engineering
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Function setting
Setting product purity
References
Main software
Continuous process simulation software
Aspen + and Dyna + from Aspen Technology
Hysys from AEA Technology-Hyprotech
ProSim from ProSim
ProVision from Simulation Science
INDISS from RSI
Batch process simulation software
Batch-Frac from Aspen Technology
ProSim-Batch...
Suppliers of advanced control software (non-exhaustive list)
ABB Process Automation http://www.abb.com
ADERSA http://www.adersa.com
AEA Technology-Hyprotech https://www.aspentech.com/en
...
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