Regeneratively cooled coal combustor/gasifier with integral dry ash removal

Patent · Tue Oct 04 00:00:00 EDT 1983

OSTI ID:864716

Beaufrere, Albert H ^[1]

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1. Huntington, NY

A coal combustor/gasifier is disclosed which produces a low or medium combustion gas for further combustion in modified oil or gas fired furnaces or boilers. Two concentric shells define a combustion volume within the inner shell and a plenum between them through which combustion air flows to provide regenerative cooling of the inner shell for dry ash operation. A fuel flow and a combustion air flow having opposed swirls are mixed and burned in a mixing-combustion portion of the combustion volume and the ash laden combustion products flow with a residual swirl into an ash separation region. The ash is cooled below the fusion temperature and is moved to the wall by centrifugal force where it is entrained in the cool wall boundary layer. The boundary layer is stabilized against ash re-entrainment as it is moved to an ash removal annulus by a flow of air from the plenum through slots in the inner shell, and by suction on an ash removal skimmer slot.

• Research Organization: Associated Universities, Inc., Upton, NY (United States)
• DOE Contract Number: AC02-76CH00016
• Assignee: Beaufrere, Albert H. (Huntington, NY)
• Patent Number(s): US 4407205
• Application Number: 06/373,582
• OSTI ID: 864716
• Country of Publication: United States
• Language: English

Related Subjects

regeneratively
cooled
coal
combustor
gasifier
integral
dry
ash
removal
disclosed
produces
medium
combustion
gas
modified
oil
fired
furnaces
boilers
concentric
shells
define
volume
inner
shell
plenum
air
flows
provide
regenerative
cooling
operation
fuel
flow
opposed
swirls
mixed
burned
mixing-combustion
portion
laden
products
residual
swirl
separation
region
below
fusion
temperature
moved
wall
centrifugal
force
entrained
cool
boundary
layer
stabilized
re-entrainment
annulus
slots
suction
skimmer
slot
cooled below
air flows
centrifugal force
inner shell
combustion products
air flow
combustion air
combustion gas
boundary layer
ash removal
combustion product
fuel flow
separation region
gas fired
coal combustor
/110/60/