Fuel combustion exhibiting low NO.sub.x and CO levels

Patent · Mon Jan 01 00:00:00 EST 1996

OSTI ID:870534

Keller, Jay O ^[1]; Bramlette, T Tazwell ^[2]; Barr, Pamela K ^[3]

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1. 3534 Brunell Dr., Oakland, CA 94602
2. 2105 Canyon Lakes Dr., San Ramon, CA 94583
3. 294 Joyce St., Livermore, CA 94550

Method and apparatus for safely combusting a fuel in such manner that very low levels of NO.sub.x and CO are produced. The apparatus comprises an inlet line (12) containing a fuel and an inlet line (18) containing an oxidant. Coupled to the fuel line (12) and to the oxidant line (18) is a mixing means (11,29,33,40) for thoroughly mixing the fuel and the oxidant without combusting them. Coupled to the mixing means (11,29,33,40) is a means for injecting the mixed fuel and oxidant, in the form of a large-scale fluid dynamic structure (8), into a combustion region (2). Coupled to the combustion region (2) is a means (1,29,33) for producing a periodic flow field within the combustion region (2) to mix the fuel and the oxidant with ambient gases in order to lower the temperature of combustion. The means for producing a periodic flow field can be a pulse combustor (1), a rotating band (29), or a rotating cylinder (33) within an acoustic chamber (32) positioned upstream or downstream of the region (2) of combustion. The mixing means can be a one-way flapper valve (11); a rotating cylinder (33); a rotating band (29) having slots (31) that expose open ends (20,21) of said fuel inlet line (12) and said oxidant inlet line (18) simultaneously; or a set of coaxial fuel annuli (43) and oxidizer annuli (42,44). The means for producing a periodic flow field (1, 29, 33) may or may not be in communication with an acoustic resonance. When employed, the acoustic resonance may be upstream or downstream of the region of combustion (2).

• Research Organization: AT&T
• DOE Contract Number: AC04-76DP00789
• Assignee: Keller, Jay O. (3534 Brunell Dr., Oakland, CA 94602);Bramlette, T. Tazwell (2105 Canyon Lakes Dr., San Ramon, CA 94583);Barr, Pamela K. (294 Joyce St., Livermore, CA 94550)
• Patent Number(s): US 5540583
• OSTI ID: 870534
• Country of Publication: United States
• Language: English

Related Subjects

fuel
combustion
exhibiting
levels
method
apparatus
safely
combusting
manner
produced
comprises
inlet
line
12
containing
18
oxidant
coupled
mixing
means
11
29
33
40
thoroughly
injecting
mixed
form
large-scale
fluid
dynamic
structure
region
producing
periodic
flow
field
mix
ambient
gases
temperature
pulse
combustor
rotating
band
cylinder
acoustic
chamber
32
positioned
upstream
downstream
one-way
flapper
valve
slots
31
expose
20
21
simultaneously
set
coaxial
annuli
43
oxidizer
42
44
communication
resonance
employed
inlet line
oxidant inlet
acoustic resonance
fuel inlet
flow field
apparatus comprises
fuel combustion
pulse combustor
apparatus comprise
fluid dynamic
mixed fuel
thoroughly mix
ambient gas
/431/