Dual-water mixture fuel burner

Patent · Tue Aug 05 04:00:00 EDT 1986

OSTI ID:865941

Brown, Thomas D ^[1]; Reehl, Douglas P ^[2]; Walbert, Gary F ^[3]

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1. Finleyville, PA
2. Pittsburgh, PA
3. Library, PA

A coal-water mixture (CWM) burner includes a conically shaped rotating cup into which fuel comprised of coal particles suspended in a slurry is introduced via a first, elongated inner tube coupled to a narrow first end portion of the cup. A second, elongated outer tube is coaxially positioned about the first tube and delivers steam to the narrow first end of the cup. The fuel delivery end of the inner first tube is provided with a helical slot on its lateral surface for directing the CWM onto the inner surface of the rotating cup in the form of a uniform, thin sheet which, under the influence of the cup's centrifugal force, flows toward a second, open, expanded end portion of the rotating cup positioned immediately adjacent to a combustion chamber. The steam delivered to the rotating cup wets its inner surface and inhibits the coal within the CWM from adhering to the rotating cup. A primary air source directs a high velocity air flow coaxially about the expanded discharge end of the rotating cup for applying a shear force to the CWM in atomizing the fuel mixture for improved combustion. A secondary air source directs secondary air into the combustion chamber adjacent to the outlet of the rotating cup at a desired pitch angle relative to the fuel mixture/steam flow to promote recirculation of hot combustion gases within the ignition zone for increased flame stability.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4604052
• Application Number: 06/728,358
• OSTI ID: 865941
• Country of Publication: United States
• Language: English

Related Subjects

/431/110/239/
adhering
adjacent
air
air flow
air source
angle
angle relative
applying
atomizing
burner
centrifugal
centrifugal force
chamber
chamber adjacent
coal
coal particle
coal particles
coal-water
coal-water mixture
coaxially
coaxially position
coaxially positioned
combustion
combustion chamber
combustion gas
combustion gases
comprised
conically
conically shaped
coupled
cup
cwm
delivered
delivers
delivery
desired
desired pit
directing
directs
discharge
dual-water
elongated
elongated inner
elongated outer
expanded
flame
flow
flows
force
form
fuel
fuel burner
fuel delivery
fuel mixture
gases
helical
hot
hot combustion
ignition
immediately
immediately adjacent
improved
improved combustion
increased
influence
inhibits
inner
inner surface
inner tube
introduced
lateral
lateral surface
mixture
narrow
outer
outer tube
outlet
particles
particles suspended
pitch
portion
positioned
positioned immediately
primary
primary air
promote
provided
recirculation
relative
rotating
rotating cup
secondary
secondary air
shaped
shear
shear force
sheet
slot
slurry
source
source directs
stability
steam
steam flow
surface
suspended
tube
tube coupled
uniform
velocity
via
water mixture
wets
zone