Integrated process for gasifying and combusting a carbonaceous fuel

Patent · Tue Jul 29 04:00:00 EDT 1986

OSTI ID:5377595

Tanca, M C

An integrated gasification/combustion process is described for sulfur and nitrogen-bearing carbonaceous fuels wherein a flue gas is produced having a reduced content of sulfur-based and nitrogen-based compounds. The process consists of: a. gasifying a first portion of the carbonaceous fuel in a gasification reactor in the presence of air to produce a hot char-containing carbon monoxide-rich fuel gas having a low Btu content; b. introducing a sulfur capturing material into the gasification reactor so that the gasifying of the carbonaceous fuel is carried out in the presence of the sulfur capturing material; c. passing the hot char-containing carbon monoxide-rich fuel gas produced in the gasification reactor through a heat exchanger in indirect heat exchange relationship with a heat exchange fluid to cool the fuel gas to a temperature less than about 1000/sup 0/F; d. introducing the cooled char-containing carbon monoxide rich fuel gas passing from the heat exchanger into a combustion zone within a vapor generating furnace; e. introducing a second portion of the carbonaceous fuel into the combustion zone of the vapor generating furnace; f. combusting the second portion of the carbonaceous fuel together with the cooled char-containing carbon monoxide-rich fuel gas within the combustion zone of the vapor generating furnace; g. introducing a sulfur capturing material into the combustion zone of the vapor generating furnace so that the combustion of the second portion of the carbonaceous fuel is carried out in the presence of the sulfur capturing material; h. passing the flue gas generated in the combustion zone of the vapor generating furnace by combusting the second portion of the carbonaceous fuel together with the cooled carbon monoxide-rich fuel gas.

• Assignee: Combustion Engineering, Inc., Windsor, CT
• Patent Number(s): US 4602573
• OSTI ID: 5377595
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
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010800 -- Coal
Lignite
& Peat-- Waste Management
014000 -- Coal
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& Peat-- Combustion
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Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION ABATEMENT
AIR POLLUTION CONTROL
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHARS
CHEMICAL REACTIONS
CHEMICAL REACTORS
COAL
COAL GASIFICATION
COMBUSTION
CONTROL
COOLING
DESULFURIZATION
ELEMENTS
ENERGY SOURCES
FILTERS
FLUE GAS
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
FURNACES
GAS FUELS
GASEOUS WASTES
GASES
GASIFICATION
HEAT EXCHANGERS
HIGH TEMPERATURE
LOW BTU GAS
MATERIALS
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
POLLUTION ABATEMENT
POLLUTION CONTROL
PYROLYSIS PRODUCTS
REMOVAL
STEAM GENERATION
SULFUR
SULFUR COMPOUNDS
SULFUR CONTENT
SULFUR DIOXIDE
SULFUR OXIDES
THERMOCHEMICAL PROCESSES
WASTES