CCD washer (counter-current decantation) simulation

residue solids + liquor + wash water -> washed solids + pregnant liquor

Governing equations

The exact equations the solver works for a ccd washer (counter-current decantation) — the same math shown in the app's "Theory" panel, not a black box.

$f_{under}$

fraction of feed solute remaining with the washed solids [0..1]

$N$

number of counter-current washing (thickener) stages

$R$

wash ratio — wash liquid per retained underflow liquid

$W_{wash}$

wash-solvent flow [mol/s]

$L_{under}$

liquor retained in the underflow [mol/s]

Parameters

n_stages [default 5], underflow_liquor_ratio [mol liquid per mol solid, default 2.0], solvent [wash medium id, default water], solids_recovery [default 1.0]; optional solute_components [list]

Example flowsheets that use it