Tutorial on using the drying operation

Example - how to model drying with this flowchart editor / process simulator

dry sugar

Before you continue... should have a basic understanding of the following:

Topic and recipe of example project

Purify sugar from it's impurities by clarification with activated carbon, and crystallization according to the following recipe:

Dissolve 80 kg crude sugar in 100 litres of water (on about 90°C), and clarify it with 5 kg of activated carbon. Then filter off the hot mixture. Cool down the filtrate (crystallization begins) and add 50 litres of ethanol to it (more sugar precipitates because of the weaker solubility in alcohol). Then filter the sugar crystals, and wash the filter cake with 10 litres ethanol.

Finally the wet, purified product is dryed in a dryer equipment.

Tip: try to follow this tutorial with the flowchart editor using example project: Sugar crystallization!

Drying: separate volatile components from solid material

Follow these principles during definition of composition of dry material:
  • Use %C unit as often as possible. This makes your project more robust to changes.
  • Use 100 %C for non-volatile compounds: the whole amount of these remain in the dryer.
  • For volatile components which evaporates totally not even a row is necessary. These can be omitted.
  • Volatile components which stays to a definite extent should be defined: the remaining amount must be determined by some experimental work. Swith the unit in the checking fields to %FM, so the ratio of remaining compound could be checked easily.

example drying with solvent residue

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