Slurry burner for mixture of carbonaceous material and water

Patent · Thu Jan 01 00:00:00 EST 1987

OSTI ID:866150

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

---

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

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