Slurry burner for mixture of carbonaceous material and water

Patent · Thu Jan 01 04:00:00 EST 1987

OSTI ID:866150

Nodd, Dennis G ^[1]; Walker, Richard J ^[2]

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1. West Mifflin, PA
2. Bethel Park, PA

A carbonaceous material-water slurry burner includes a high pressure tip-emulsion atomizer for directing a carbonaceous material-water slurry into a combustion chamber for burning therein without requiring a support fuel or oxygen enrichment of the combustion air. Introduction of the carbonaceous material-water slurry under pressure forces it through a fixed atomizer wherein the slurry is reduced to small droplets by mixing with an atomizing air flow and directed into the combustion chamber. The atomizer includes a swirler located immediately adjacent to where the fuel slurry is introduced into the combustion chamber and which has a single center channel through which the carbonaceous material-water slurry flows into a plurality of diverging channels continuous with the center channel from which the slurry exits the swirler immediately adjacent to an aperture in the combustion chamber. The swirler includes a plurality of slots around its periphery extending the length thereof through which the atomizing air flows and by means of which the atomizing air is deflected so as to exert a maximum shear force upon the carbonaceous material-water slurry as it exits the swirler and enters the combustion chamber. A circulating coolant system or boiler feed water is provided around the periphery of the burner along the length thereof to regulate burner operating temperature, eliminate atomizer plugging, and inhibit the generation of sparklers, thus increasing combustion efficiency. A secondary air source directs heated air into the combustion chamber to promote recirculation of the hot combustion gases within the combustion chamber.

• Research Organization: MANAGEMENT & TECH SERV CO
• DOE Contract Number: AC22-82PC51504
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4644878
• OSTI ID: 866150
• Country of Publication: United States
• Language: English

Related Subjects

/110/239/
adjacent
air
air flow
air flows
air source
aperture
atomizer
atomizing
boiler
boiler feed
burner
burning
carbonaceous
carbonaceous material
carbonaceous material-water
center
chamber
channel
channels
circulating
circulating coolant
combustion
combustion air
combustion chamber
combustion efficiency
combustion gas
combustion gases
continuous
coolant
deflected
directed
directing
directs
diverging
droplets
efficiency
eliminate
enrichment
enters
exert
exits
extending
feed
feed water
fixed
flow
flows
force
forces
fuel
gases
generation
heated
heated air
hot
hot combustion
immediately
immediately adjacent
increasing
inhibit
introduced
introduction
length
located
material
material-water
material-water slurry
maximum
means
mixing
mixture
operating
operating temperature
oxygen
oxygen enrichment
periphery
plugging
plurality
pressure
pressure forces
promote
provided
recirculation
reduced
regulate
requiring
secondary
secondary air
shear
shear force
single
slots
slurry
slurry burner
slurry flow
source
source directs
sparklers
support
swirler
temperature
therein
tip-emulsion
water
water slurry