Fluidized bed combuster process

Patent · Tue Nov 25 00:00:00 EST 1986

OSTI ID:6969301

Mansfield, V

This patent describes a process for burning high-sulfur coal while removing the sulfur therefrom, comprising: transporting, on a run of an endless grate, a burning bed of high sulfur coal through a furnace from an input end of the furnace to a laterally spaced output end thereof. During this time air is fed upwardly through the bed in quantities and at pressures sufficient only to react with most of the carbon content of the coal in the bed while creating an atmosphere of sulfur-laden gaseous by-products above the bed, free-falling a residue of clinkers and small particles of burned and partly burned coal off the end of the grate run, blowing through the free-falling residue with an upward blast of air of a force sufficient to elevate the small particles upwardly to a level higher than the bed but insufficient force to divert the clinkers from free-falling into a collector, blasting the elevated particles back through the atmosphere above the burning bed towards the front end of the furnace with a blast of air with limestone particles entrained therein. In this way the air reacts with at least most of the carbon contents of the particles while the limestone particles react with and grab the sulfur in the atmosphere above the bed, and forming clinkers consisting of the reacted particles, which clinkers drop onto the burning bed and ride thereon through the furnace and drop off at the end of the grate run.

• Assignee: Mansfield Carbon Products, Nashville, TN
• Patent Number(s): US 4624192
• OSTI ID: 6969301
• Resource Relation: Patent File Date: Filed date 20 Mar 1986
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
54 ENVIRONMENTAL SCIENCES
42 ENGINEERING
COAL
FLUIDIZED-BED COMBUSTION
FLUE GAS
DESULFURIZATION
FLUIDIZED-BED COMBUSTORS
AIR POLLUTION CONTROL
SULFUR DIOXIDE
REMOVAL
AIR FLOW
ASHES
CARBON
FURNACES
LIMESTONE
PARTICULATES
PRESSURE DEPENDENCE
SPACE DEPENDENCE
SULFUR CONTENT
CARBONACEOUS MATERIALS
CARBONATE ROCKS
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION
COMBUSTORS
CONTROL
ELEMENTS
ENERGY SOURCES
FLUID FLOW
FOSSIL FUELS
FUELS
GAS FLOW
GASEOUS WASTES
MATERIALS
NONMETALS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PARTICLES
POLLUTION CONTROL
RESIDUES
ROCKS
SEDIMENTARY ROCKS
SULFUR COMPOUNDS
SULFUR OXIDES
THERMOCHEMICAL PROCESSES
WASTES
014000* - Coal
Lignite
& Peat- Combustion
010800 - Coal
Lignite
& Peat- Waste Management
500200 - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)
421000 - Engineering- Combustion Systems