INDIRECT DRYING FOR EFFICIENT RECOVERY OF WET COAL FINES

摘要

Coal fines are typically generated in the crushing and drying processes during coal preparation prior to combustion in utility boilers. To avoid particulate emissions, coal fines are captured by mechanical separation and wet scrubbers. The separated solids are typically processed into fuel, and the wet scrubber effluent, containing ultra-fine coal particles, is pumped to surface impoundments where the fine sediment is deposited and stored as a waste. Indirect drying can be used to convert this waste into a fuel.