Inclined fluidized bed system for drying fine coal

Patent · Tue Feb 11 00:00:00 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

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