This boiler ash handling and recovery system is designed to remove unburned carbon (char), ash, grit, and sand from wastewater discharged from a wood and bark power boiler. Slurry, composed of water and solids, is sent from the wet precipitator to the dewatering screen at rates of 800 to 2,200 GPM. The HI-G dewatering screen uses (2) low horsepower, industrial vibration motors to apply a high G-force on the urethane screen panels. This separates the water from the solids.
The unburned carbon, or char, is discharged from the dewatering screen onto a belt conveyor. It is also stacked on grade for transfer to the bark or waste wood storage area for re-burning in the boiler. The ash, grit, and sand is removed for disposal in a land fill. This type of ash handling and recovery system can be also be used to remove minerals and other solids from process and cooling water streams.
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