Fluidized bed combustion apparatus and method of operating same
This patent describes a coal burning boiler having a dense bed column with a closed end and opening into a combustion chamber, and a source of coal. The improvement described here comprises: (a) coal processing mill means adapted to receive coal from the source and having a first outlet conduit connected to a the dense bed column adjacent the closed end and a second outlet conduit connected to the dense bed column spaced from the connection of the first outlet conduit to the dense bed column; (b) means supplying air into the coal processing mill means for stripping fine particulate fractions and delivering the same into the first outlet conduit for injection into the dense bed column; (c) means in the second outlet conduit connection operable to feed coarse particulate fractions into the dense bed column for supplying coarse coal fractions into the column spaced from the injection of fines into the column; and (d) air supply means connected into the dense bed column adjacent the closed end of the dense bed column for fluidizing the fine and coarse coal fractions in the dense bed column.
- Assignee:
- Williams Patent Crusher and Pulverizer Co., St. Louis, MO
- Patent Number(s):
- US 4640204
- OSTI ID:
- 6682497
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
014000* -- Coal
Lignite
& Peat-- Combustion
42 ENGINEERING
421000 -- Engineering-- Combustion Systems
AIR FLOW
BOILERS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
COAL FINES
COMBUSTION
COMBUSTION CHAMBERS
DENSITY
DESIGN
ENERGY SOURCES
FLUID FLOW
FLUIDIZED BED BOILERS
FLUIDIZED-BED COMBUSTION
FOSSIL FUELS
FUEL FEEDING SYSTEMS
FUEL SYSTEMS
FUELS
GAS FLOW
MATERIALS
OPERATION
OXIDATION
PARTICLES
PARTICULATES
PHYSICAL PROPERTIES
THERMOCHEMICAL PROCESSES