Get oil and gas out of pulverized-coal firing
Three manufacturers are developing ways to cut down and even eliminate the firing of premium fuels in pulverized coal-fired boilers. Combustion Engineering uses a stored supply of pulverized coal in place of gas or oil. At the TVA Bull Run station Foster Wheeler Energy Co. reduces the mass of cool air that carries the coal into the boiler during low-load operation and startup and which extinguishes the flame. Babcock and Wilcox use electrically generated plasma to ignite and stabilize the pulverized coal flame. In a plasma torch, the resistance to the passage of electric current through ionized gas results in a high temperature plasma flame. Future methods are considered. They will center on ways of increasing the turndown ratio of pulverized coal burners. Flame control by fuel/air ratio, or by more than one air-coal stream turndowns are mentioned. The split nozzle is marketed by Combustion Engineering for this purpose.
- OSTI ID:
- 5481771
- Journal Information:
- Power; (United States), Journal Name: Power; (United States) Vol. 127:5; ISSN POWEA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
014000 -- Coal
Lignite
& Peat-- Combustion
42 ENGINEERING
421000* -- Engineering-- Combustion Systems
BOILER FUELS
BOILERS
CARBONACEOUS MATERIALS
CHEMICAL REACTION KINETICS
COAL
COMBUSTION CONTROL
COMBUSTION KINETICS
CONTROL
ENERGY SOURCES
FLAME PROPAGATION
FOSSIL FUELS
FUEL FEEDING SYSTEMS
FUEL SUBSTITUTION
FUEL SYSTEMS
FUEL-AIR RATIO
FUELS
HEATING
IGNITION
IGNITION SYSTEMS
KINETICS
MANUFACTURERS
MATERIALS
NOZZLES
PLASMA HEATING
REACTION KINETICS
TECHNOLOGY ASSESSMENT