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

Patent · 01 January 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, Pittsburgh, PA, and Morgantown, WV
• 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

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