Pilot-scale investigation of closed-loop fly-ash sluicing. Volume 1. Final report
The report gives results of a pilot-scale demonstration of the technical feasibility of closed-loop operation of fly-ash sluicing systems. Chemical species leached from the ash increase the dissolved solids concentration of recycled sluice water to a point where equipment scaling may occur. Tests were conducted at two power plants using a 50-gpm pilot unit to demonstrate the feasibility of closed-loop operation, both with and without sluice water treatment. An ash-sluice computer process model was developed to predict chemistry and process conditions in full-scale systems. Fly-ash sluicing systems handling highly reactive alkaline ashes cannot be operated closed-loop without treating the sluice-watermore »