Paper presented at the 6th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, South Africa, 30 June - 2 July, 2008.
Wet Flue Gas Desulphurisation (FGD) technology is the
most frequently used scrubbing process for sulphur dioxide
(SO2) reduction from coal-fired utility boilers. Wet limestone
FGD-plants using Open Spray Tower (OST) technology are the
most commonly used.
CFD has been used to investigate the gas-liquid fluid
dynamics inside a counter-current OST and the heat transfer
between the phases. The continuous phase (gas) is modelled in
the Eulerian framework while the discrete phase (liquid
droplets) in the Lagrangian frame of reference. Simulation
results show good agreement with measurements on a pilot
plant flue gas cleaning unit. The commercial code Fluent
6.3.26, completed with the necessary subroutines for liquid
phase properties and slurry wall interaction, has been used for