Tube construction for fluidized bed combustor

Patent · Sun Jan 01 00:00:00 EST 1984

OSTI ID:865097

De Feo, Angelo ^[1]; Hosek, William ^[2]

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1. Totowa, NJ
2. Mt. Tabor, NJ

A fluidized bed combustor comprises a reactor or a housing which has a windbox distributor plate adjacent the lower end thereof which contains a multiplicity of hole and air discharge nozzles for discharging air and coal into a fluidized bed which is maintained above the distributor plate and below a take-off connection or flue to a cyclone separator in which some of the products of combustion are treated to remove the dust which is returned into the fluidized bed. A windbox is spaced below the fluidized bed and it has a plurality of tubes passing therethrough with the passage of combustion air and fluidizing air which passes through an air space so that fluidizing air is discharged into the reaction chamber fluidized bed at the bottom thereof to maintain the bed in a fluidized condition. A fluid, such as air, is passed through the tubes which extend through the windbox and provide a preheating of the combustion air and into an annular space between telescoped inner and outer tubes which comprise heat exchanger tubes or cooling tubes which extend upwardly through the distributor plate into the fluidized bed. The heat exchanger tubes are advantageously arranged so that they may be exposed in groups within the reactor in a cluster which is arranged within holding rings.

• Research Organization: Curtiss-Wright Corp
• DOE Contract Number: EX-76-C-01-1726
• Assignee: Curtiss-Wright Corporation (NJ)
• Patent Number(s): US 4460037
• OSTI ID: 865097
• Country of Publication: United States
• Language: English

Related Subjects

tube
construction
fluidized
bed
combustor
comprises
reactor
housing
windbox
distributor
plate
adjacent
contains
multiplicity
air
discharge
nozzles
discharging
coal
maintained
below
take-off
connection
flue
cyclone
separator
products
combustion
treated
remove
dust
returned
spaced
plurality
tubes
passing
therethrough
passage
fluidizing
passes
space
discharged
reaction
chamber
bottom
maintain
condition
fluid
passed
extend
provide
preheating
annular
telescoped
inner
outer
comprise
heat
exchanger
cooling
upwardly
advantageously
arranged
exposed
cluster
holding
rings
combustor comprises
exchanger tubes
cyclone separator
reaction chamber
heat exchange
fluidized bed
heat exchanger
combustion air
outer tube
bed combustor
annular space
fluidizing air
outer tubes
passing therethrough
distributor plate
cooling tubes
spaced below
cooling tube
tubes passing
extend upwardly
tube construction
windbox distributor
tubes pass
plate adjacent
air discharge
air space
discharge nozzles
/165/