Fluidized bed combustion apparatus and method of operating same

Patent · Tue Feb 03 00:00:00 EST 1987

OSTI ID:6682497

Williams, R M

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
• Resource Relation: Patent File Date: Filed date 9 Jun 1986
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
42 ENGINEERING
COAL FINES
FLUIDIZED-BED COMBUSTION
FLUIDIZED BED BOILERS
DESIGN
OPERATION
AIR FLOW
COAL
COMBUSTION CHAMBERS
DENSITY
FUEL FEEDING SYSTEMS
PARTICULATES
BOILERS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COMBUSTION
ENERGY SOURCES
FLUID FLOW
FOSSIL FUELS
FUEL SYSTEMS
FUELS
GAS FLOW
MATERIALS
OXIDATION
PARTICLES
PHYSICAL PROPERTIES
THERMOCHEMICAL PROCESSES
014000* - Coal
Lignite
& Peat- Combustion
421000 - Engineering- Combustion Systems