Method of retrofitting an oil-fired boiler to use coal and gas combustion

Patent · Mon Dec 30 23:00:00 EST 1985

OSTI ID:5900637

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

Various embodiments of apparatus and methods are disclosed for the conversion of steam boilers from being oil fired to coal and natural gas fired without adversely affecting the normal power density of the boilers or the emission pollution therefrom. In some cases even the resultant coal ash can be modified by injecting a powdered catalyst or phosphate slimes into the flame to produce a fertilizer ash having desirable minerals to enhance the economic value thereof. Basically all embodiments include a swirling coal-air mixture directed along a path to form a sheath and a swirling gas-air mixture internally thereof with the swirling of the latter being in the same direction and fortifying the motion of the former. A gas-air mixture, swirling or non-swirling, may be supplied outwardly of such sheath to enhance the more complete burning of the coal-air mixture.

• Assignee: Univ. of Florida
• Patent Number(s): US 4561364
• OSTI ID: 5900637
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000 -- Coal
Lignite
& Peat-- Combustion
03 NATURAL GAS
034000 -- Natural Gas-- Combustion
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320301* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Energy Sources
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION ABATEMENT
BOILER FUELS
BOILERS
BURNERS
CARBONACEOUS MATERIALS
COAL
COMBUSTION CONTROL
CONTROL
DESIGN
DISPERSIONS
ENERGY SOURCES
FLUID FLOW
FLUIDS
FOSSIL FUELS
FUEL GAS
FUEL OILS
FUEL SUBSTITUTION
FUEL SYSTEMS
FUEL-AIR RATIO
FUELS
GAS FUELS
GASES
LIQUID FUELS
MATERIALS
MIXTURES
NATURAL GAS
OILS
OPTIMIZATION
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
POLLUTION ABATEMENT
RETROFITTING
STEAM GENERATORS
VAPOR GENERATORS
VORTEX FLOW