Process for the production of fuel gas from coal

Patent · Fri Jan 01 00:00:00 EST 1982

OSTI ID:864134

Patel, Jitendra G ^[1]; Sandstrom, William A ^[2]; Tarman, Paul B ^[3]

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1. Bolingbrook, IL
2. Chicago, IL
3. Elmhurst, IL

An improved apparatus and process for the conversion of hydrocarbonaceous materials, such as coal, to more valuable gaseous products in a fluidized bed gasification reaction and efficient withdrawal of agglomerated ash from the fluidized bed is disclosed. The improvements are obtained by introducing an oxygen containing gas into the bottom of the fluidized bed through a separate conduit positioned within the center of a nozzle adapted to agglomerate and withdraw the ash from the bottom of the fluidized bed. The conduit extends above the constricted center portion of the nozzle and preferably terminates within and does not extend from the nozzle. In addition to improving ash agglomeration and withdrawal, the present invention prevents sintering and clinkering of the ash in the fluidized bed and permits the efficient recycle of fine material recovered from the product gases by contacting the fines in the fluidized bed with the oxygen as it emanates from the conduit positioned within the withdrawal nozzle. Finally, the present method of oxygen introduction permits the efficient recycle of a portion of the product gases to the reaction zone to increase the reducing properties of the hot product gas.

• Research Organization: Memphis Light, Gas and Water Div., TN
• DOE Contract Number: EF-77-C-01-2582
• Assignee: Institute of Gas Technology (Chicago, IL)
• Patent Number(s): US 4315758
• OSTI ID: 864134
• Country of Publication: United States
• Language: English

Related Subjects

process
production
fuel
gas
coal
improved
apparatus
conversion
hydrocarbonaceous
materials
valuable
gaseous
products
fluidized
bed
gasification
reaction
efficient
withdrawal
agglomerated
ash
disclosed
improvements
obtained
introducing
oxygen
containing
bottom
separate
conduit
positioned
center
nozzle
adapted
agglomerate
withdraw
extends
constricted
portion
preferably
terminates
extend
addition
improving
agglomeration
prevents
sintering
clinkering
permits
recycle
fine
material
recovered
product
gases
contacting
fines
emanates
finally
method
introduction
zone
increase
reducing
properties
hot
hot product
center portion
gasification reaction
hydrocarbonaceous materials
conduit extends
bed gasification
oxygen containing
product gases
product gas
carbonaceous materials
fuel gas
fluidized bed
carbonaceous material
reaction zone
gaseous product
containing gas
improved apparatus
gaseous products
ash agglomeration
agglomerated ash
separate conduit
/48/