Role of mixing in powder injection desulphurisation processes

Mixing times were measured in one-fifth scale water models of 150 and 240 t torpedo cars during simulations of the injection of calcium carbide and limestone. Contrary to intuition, it was found that the powder had a negligible effect on mixing times, even at high loadings and velocities, unless the particles changed the trajectory of the carrier gas. Measured mixing times were used in a kinetic model for desulphurisation in the ascending three …