New temperature and metals emissions monitoring technologies for furnaces

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:186819

Woskov, P P; Cohn, D R; Rhee, D Y; Thomas, P ^[1]; Surma, J E ^[2]; Titus, C H ^[3]

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1. Massachusetts Inst. of Technology, Cambridge, MA (United States). Plasma Fusion Center
2. Pacific Northwest Labs., Richland, WA (United States)
3. T and R Associates, Wayne, PA (United States)

New technologies have been successfully tested for continuous real time monitoring of temperature and hazardous metals emission in a DC graphite electrode arc furnace that is being evaluated for mixed waste processing. An active millimeter-wave pyrometer with rotatable graphite waveguide/mirror optics inside the furnace has proven to be a robust, spatially resolved temperature monitor of the molten slag and refractory surfaces even during waste feeding operations when dense smoke is present. The active probe beam provides additional information on surface emissivities. A microwave plasma torch constructed of refractory materials has been implemented as part of the furnace exhaust duct up stream of the scrubbers to sample high temperature, >500 C, undiluted exhaust gases. It has proven to be a robust gas excitation device for sensitive in situ atomic emission spectroscopy (in the part per billion range) of metals entrained in the exhaust emissions.

• OSTI ID: 186819
• Report Number(s): CONF-9510125--
• Country of Publication: United States
• Language: English

Related Subjects

05 NUCLEAR FUELS
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION CONTROL
ARC FURNACES
DECONTAMINATION
HAZARDOUS MATERIALS
OFF-GAS SYSTEMS
PLASMA FURNACES
PLASMA HEATING
RADIOACTIVE WASTES
REMEDIAL ACTION
TEMPERATURE MONITORING
US DOE