Two-stage fixed-bed gasifier with selectable middle gas off-take point

Patent · Wed Jan 01 00:00:00 EST 1992

OSTI ID:868431

Strickland, Larry D ^[1]; Bissett, Larry A ^[1]

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1. Morgantown, WV

A two-stage fixed bed coal gasifier wherein an annular region is in registry with a gasification zone underlying a devolatilization zone for extracting a side stream of high temperature substantially tar-free gas from the gasifier. A vertically displaceable skirt means is positioned within the gasifier to define the lower portion of the annular region so that vertical displacement of the skirt means positions the inlet into the annular region in a selected location within or in close proximity to the gasification zone for providing a positive control over the composition of the side stream gas.

• Research Organization: National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 5139535
• OSTI ID: 868431
• Country of Publication: United States
• Language: English

Related Subjects

two-stage
fixed-bed
gasifier
selectable
middle
gas
off-take
fixed
bed
coal
annular
region
registry
gasification
zone
underlying
devolatilization
extracting
stream
temperature
substantially
tar-free
vertically
displaceable
skirt
means
positioned
define
portion
vertical
displacement
positions
inlet
selected
location
close
proximity
providing
positive
control
composition
temperature substantially
gasification zone
coal gasifier
close proximity
annular region
coal gas
fixed bed
selected location
bed coal
positive control
vertical displacement
fixed-bed gasifier
middle gas
two-stage fixed
bed gasifier
devolatilization zone
/48/