Method and apparatus of gas-coal combustion in steam boilers

Patent · Tue Feb 25 04:00:00 EST 1986

OSTI ID:6003891

Green, E S; Green, B A.S.

This patent describes a combustion device for burning a powdered coal-fluid mixture. This combustion device consists of: a combustion chamber, first nozzle means communicating with the chamber for spirally swirling the coal-fluid mixture along a path in the chamber to form a hollow sheath of coal-fluid mixture. A second nozzle means communicating with the chamber and located generally centrally of the hollow sheath for spirally swirling combustible gas-air mixture in the chamber and within the sheath of coal-fluid mixture in the same direction of swirl to reinforce the swirling motion of the coal-fluid mixture forming the sheath without general mixing therebetween. To promote volatilization and enhance the combustion of the coal-fluid mixture, there are means for burning the coal-fluid mixture and the gas-air mixture within the chamber. The first supply means fluidly communicating with the first nozzle means for providing coal-fluid mixture to the first nozzle means and the chamber, second supply means fluidly communicating with the second nozzle means for providing gas-air mixture to the chamber, the second nozzle means including an elongated insert having upstream and downstream end portions, the downstream end portion of the insert being adjacent the second supply means, a plurality of spaced generally spiral channels in the outer surface of the insert extending from the upstream end portion and terminating in the downstream end portion. The channels communicate between the second supply means and the chamber for spirally swirling the gas-air mixture prior to egressing from the second supply means into the chamber.

• Assignee: University of Florida, Gainesville, FL
• Patent Number(s): US 4572084
• OSTI ID: 6003891
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
42 ENGINEERING
421000 -- Engineering-- Combustion Systems
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION ABATEMENT
BURNERS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL FINES
COMBUSTION
DESIGN
DISPERSIONS
ELEMENTS
EXHAUST GASES
FLUID FLOW
FLUIDS
FUEL SLURRIES
FUELS
FURNACES
GASEOUS WASTES
GASES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
IRON COMPOUNDS
IRON OXIDES
IRON SULFIDES
MIXTURES
NONMETALS
NOZZLES
OXIDATION
OXIDES
OXYGEN
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
SCRUBBING
SLAGS
SLURRIES
SULFIDES
SULFUR COMPOUNDS
SULFUR CONTENT
SUSPENSIONS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
TURBULENT FLOW
VERY HIGH TEMPERATURE
WASTES