Desalination and zero liquid discharge
Seawater RO with its thermodynamic ceiling checked every solve, then thermal brine concentration where pressure stops working.
The actual dark-mode canvas: a high-pressure pump feeds reverse osmosis, the concentrate is boiled down in a steam-driven brine concentrator, and a crystallizer closes the loop to salt.
Where the recovery actually stops
Two different ceilings decide a desalination train, and confusing them is expensive. The first is thermodynamic: the retentate's osmotic pressure has to stay under the feed pressure, and the model returns a structured infeasibility rather than an unphysical split when it does not. The second is chemical, and it usually binds first — silica, calcium sulfate and barite reach saturation long before the pump runs out, and no amount of pressure moves that limit. Screen it with the silica and cooling-water tools before sizing anything, because a recovery that is thermodynamically fine and chemically impossible looks identical on a datasheet.
Unit ops shipped for this vertical
Raises liquid pressure; a flow-dependent head curve drives it in pressure-driven mode.
Solution-diffusion rating model, bounded by van't Hoff osmotic pressure.
Process feed against heating steam — concentrated liquid, vapour boil-off and steam condensate in one balance.
MSMPR population balance — nucleation and growth set the mean crystal size.
Stream feed pressure, permeate flow and brine density from the plant into this flowsheet's twin comparison — recovery drifting at constant pressure is the earliest sign the elements are fouling or the brine is scaling.
See the Digital Twin platform →Try it yourself
- ✓Osmotic pressure checked against feed pressure
- ✓Brine concentrator and crystallizer to solid salt
- ✓Steam economy that stays honestly below the effect count