Two-stage coal gasification and desulfurization apparatus

Patent · Tue Jan 01 00:00:00 EST 1991

OSTI ID:868080

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

---

1. Morgantown, WV

The present invention is directed to a system which effectively integrates a two-stage, fixed-bed coal gasification arrangement with hot fuel gas desulfurization of a first stream of fuel gas from a lower stage of the two-stage gasifier and the removal of sulfur from the sulfur sorbent regeneration gas utilized in the fuel-gas desulfurization process by burning a second stream of fuel gas from the upper stage of the gasifier in a combustion device in the presence of calcium-containing material. The second stream of fuel gas is taken from above the fixed bed in the coal gasifier and is laden with ammonia, tar and sulfur values. This second stream of fuel gas is burned in the presence of excess air to provide heat energy sufficient to effect a calcium-sulfur compound forming reaction between the calcium-containing material and sulfur values carried by the regeneration gas and the second stream of fuel gas. Any ammonia values present in the fuel gas are decomposed during the combustion of the fuel gas in the combustion chamber. The substantially sulfur-free products of combustion may then be combined with the desulfurized fuel gas for providing a combustible fluid utilized for driving a prime mover.

• 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 5069685
• OSTI ID: 868080
• Country of Publication: United States
• Language: English

Related Subjects

two-stage
coal
gasification
desulfurization
apparatus
directed
effectively
integrates
fixed-bed
arrangement
hot
fuel
gas
stream
stage
gasifier
removal
sulfur
sorbent
regeneration
utilized
fuel-gas
process
burning
upper
combustion
device
presence
calcium-containing
material
fixed
bed
laden
ammonia
tar
values
burned
excess
air
provide
heat
energy
sufficient
effect
calcium-sulfur
compound
forming
reaction
carried
decomposed
chamber
substantially
sulfur-free
products
combined
desulfurized
providing
combustible
fluid
driving
prime
mover
sulfur sorbent
fixed-bed coal
provide heat
gas desulfurization
prime mover
coal gasifier
heat energy
fuel gas
combustion chamber
coal gasification
coal gas
fixed bed
bed coal
two-stage coal
sorbent regeneration
excess air
containing material
sulfur values
combustion device
compound form
energy sufficient
gasification arrangement
sulfur compound
hot fuel
stage coal
desulfurization process
/48/60/110/