Process for gasification and production of by-product superheated steam

Patent · Tue Jan 27 04:00:00 EST 1981

OSTI ID:5652396

Woldy, P N; Kaufman, H C; Dach, M M; Beall, J F

Texaco has developed a continuous process for the partial oxidation of an ash-containing solid fuel to produce a cool, clean stream of synthesis gas, fuel gas, or reducing gas, and by-product superheated steam. The process avoids the plugging and fouling problems caused by molten-slag droplets in the raw gas. Coal or other high-ash-containing carbonaceous solid fuel reacts with a free-oxygen-containing gas (with or without a temperature moderator) in a downflow partial-oxidation gas generator to produce a steam of raw gas. A large portion of the combustion residue (molten slag and particulates) that is entrained in the downflowing generated-gas stream is removed by gravity when the gas stream passes through a diversion chamber. The main gas stream, leaving the diversion chamber through a side outlet, passes up through a solids-separation zone, optionally including gas-gas quench cooling, cyclones, filters and impingement separators. Next, most of the sensible heat in the gas stream is recovered by indirect heat exchange with boiler feed water and steam, thus producing saturated and superheated steam.

• Assignee: Texaco Inc.
• Patent Number(s): US 4247302
• OSTI ID: 5652396
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320304 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Waste Heat Recovery & Utilization
COAL GASIFICATION
COAL GASIFICATION PLANTS
DESIGN
ENERGY RECOVERY
FLUIDS
FUEL GAS
FUELS
GAS FUELS
GASES
GASIFICATION
HEAT RECOVERY
INDUSTRIAL PLANTS
PRODUCTION
RECOVERY
STEAM GENERATION
SYNTHESIS GAS
THERMOCHEMICAL PROCESSES
WASTE HEAT UTILIZATION
WASTE PRODUCT UTILIZATION