Fluidized bed combuster process

Patent · Tue Nov 25 04:00:00 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
• Country of Publication: United States
• Language: English

Related Subjects

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