Cooling of dried coal
Patent
·
OSTI ID:6548622
This patent describes a process for noncombustibly drying particulate coal comprising: separating the coal into two wet coal streams; passing one wet coal system into a dryer to form a bed; heating air in a furnace; admitting the heated air to the dryer to fluidize the bed; withdrawing dryer exhaust gas; passing the exhaust gas through a cyclone and withdrawing coal fines from the cyclone; withdrawing a hot, dry coal stream from the dryer; blending the drier hot dry coal stream with the cyclone coal fines; withdrawing cyclone exhaust gas; wet scrubbing the cyclone exhaust gas to form a coal fines slurry and scrubber exhaust gas; passing the coal fines slurry to a sedimentation pool; blending the second wet coal stream with the drier hot dry coal stream and the cyclone coal fines; passing the latter blended stream to a cooler to form a bed; fluidizing the latter bed with ambient air; withdrawing cooler exhaust gas and passing the gas to a cyclone; passing exhaust gas from the latter cyclone to a baghouse and collecting coal fines therein; passing the latter coal fines to the furnace as fuel for heating the air; and withdrawing cooled coal from the cooler and blending the cooled coal with coal fines from the latter cyclone.
- Assignee:
- Shell Mining Co., Houston, TX
- Patent Number(s):
- US 4750913
- OSTI ID:
- 6548622
- Country of Publication:
- United States
- Language:
- English
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