Dual-water mixture fuel burner

Patent · Tue Aug 05 00:00:00 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 (United States)
• 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

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