Bio-ethanol, with the stillage heat put back to work
A dilute beer concentrated toward the azeotrope, and the stillage evaporator's vapour mechanically recompressed into the duty that produced it.
The actual dark-mode canvas: a 10% beer concentrated toward the azeotrope, and the stillage bottoms evaporated with the vapour recompressed back into the evaporator as heating duty.
Compressor work in place of reboiler steam
Recompressing the stillage vapour lifts its saturation temperature above the evaporating liquid, so it can heat the very effect that produced it. The compressor work and the duty it displaces are both solved, which is the only way the trade is honest.
Unit ops shipped for this vertical
Wang-Henke MESH column solver — the same rigorous solve at any scale.
Process feed against heating steam — concentrated liquid, vapour boil-off and steam condensate in one balance.
Polytropic compression to pipeline/process pressure.
Stream beer-column reflux, evaporator pressure and MVR compressor discharge from the plant's OPC-UA server into this flowsheet's twin comparison — an MVR loop drifting off its solved duty balance is where a dry-mill's energy cost quietly goes.
See the Digital Twin platform →Try it yourself
- ✓Rigorous MESH beer column to the azeotrope
- ✓MVR recovers the stillage vapour's latent heat as heating duty
- ✓Compressor work traded against reboiler steam, both solved