SME
Process Design
Flowsheet synthesis
Use this for “In what order do you decide a new plant’s recycle loops, its heat recovery and its separation train?”
Put in order
Put the levels of flowsheet design in order, from the first decision to the last.
1
?
2
?
3
?
4
?
5
?
Assumptions
•
Each level fixes the streams the next level designs around.
•
A level that loses money stops the design early: no later level can make it pay.
•
Heat integration comes last, since only then are every hot and cold stream known.
Topic check
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More problem types
Economic potential of the input–output structure
Use this for “A plant makes 100 kmol/h of product worth $40 per kmol from 105 kmol/h of feed at $25, 8000 h a year. What is its economic potential?”
Separation-sequencing heuristics
Use this for “A mixture holds a corrosive acid, mostly water and two close-boiling isomers. Which column comes first?”