Inclined fluidized bed system for drying fine coal

Patent · Tue Feb 11 04:00:00 EST 1992

OSTI ID:868166

Cha, Chang Y ^[1]; Merriam, Norman W ^[2]; Boysen, John E ^[2]

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1. Golden, CO
2. Laramie, WY

Coal is processed in an inclined fluidized bed dryer operated in a plug-flow manner with zonal temperature and composition control, and an inert fluidizing gas, such as carbon dioxide or combustion gas. Recycled carbon dioxide, which is used for drying, pyrolysis, quenching, and cooling, is produced by partial decarboxylation of the coal. The coal is heated sufficiently to mobilize coal tar by further pyrolysis, which seals micropores upon quenching. Further cooling with carbon dioxide enhances stabilization.

• Research Organization: Western Research Institute (Laramie, WY)
• DOE Contract Number: AC21-87MC24268
• Assignee: Western Research Institute (Laramie, WY)
• Patent Number(s): US 5087269
• Application Number: 07/563,226
• OSTI ID: 868166
• Country of Publication: United States
• Language: English

Related Subjects

/44/34/
bed
bed dryer
carbon
carbon dioxide
coal
coal tar
combustion
combustion gas
composition
control
cooling
decarboxylation
dioxide
dryer
drying
enhances
fine
fine coal
fluidized
fluidized bed
fluidizing
fluidizing gas
gas
heated
heated sufficiently
inclined
inclined fluidized
inert
inert fluidizing
manner
micropores
mobilize
operated
partial
plug-flow
position control
processed
produced
pyrolysis
quenching
recycled
seals
stabilization
sufficiently
tar
temperature
zonal