Method and apparatus of measuring unburned carbon in fly ash

Patent · Tue Dec 03 00:00:00 EST 1991

OSTI ID:868078

Brown, Robert C ^[1]

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1. Ames, IA

A method and apparatus are shown to measure unburned carbon particles in the exhaust of a combustor. Photoacoustic absorption spectrometry is employed to measure the presence of the unburned carbon. Especially helpful in these measurements is a vertically elongated photoacoustic cell in which high flow velocities are maintained to prevent particles from settling. These measurements are useful in determining the efficiency of coal-fired combustors.

• Research Organization: Ames Laboratory (AMES), Ames, IA; Iowa State Univ., Ames, IA (United States)
• DOE Contract Number: W-7405-ENG-82
• Assignee: Iowa State University Research Foundation, Inc. (Ames, IA)
• Patent Number(s): US 5069551
• Application Number: 07/440,686
• OSTI ID: 868078
• Country of Publication: United States
• Language: English

Related Subjects

method
apparatus
measuring
unburned
carbon
fly
ash
shown
measure
particles
exhaust
combustor
photoacoustic
absorption
spectrometry
employed
presence
especially
helpful
measurements
vertically
elongated
cell
flow
velocities
maintained
prevent
settling
useful
determining
efficiency
coal-fired
combustors
flow velocities
fly ash
carbon particles
unburned carbon
prevent particles
fired combustors
prevent particle
absorption spectrometry
/356/