Process for the production of fuel gas from coal

Patent · Tue Feb 16 00:00:00 EST 1982

OSTI ID:5495403

Patel, J G; Sandstrom, W A; Tarman, P B

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.

• Assignee: Institute Of Gas Technology
• Patent Number(s): US 4315758
• OSTI ID: 5495403
• Resource Relation: Patent File Date: Filed date 18 Oct 1979; Other Information: PAT-APPL-085934
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
ASHES
REMOVAL
COAL GASIFICATION
FLUIDIZED BED REACTORS
OXYGEN ENRICHMENT
AGGLOMERATION
MATERIALS RECOVERY
NOZZLES
STEAM
ENRICHMENT
FUEL DISPERSION REACTORS
GASIFICATION
HOMOGENEOUS REACTORS
MANAGEMENT
PROCESSING
REACTORS
RECOVERY
RESIDUES
THERMOCHEMICAL PROCESSES
WASTE MANAGEMENT
WASTE PROCESSING
010404* - Coal
Lignite
& Peat- Gasification