Off-gas characteristics of defense waste vitrification using liquid-fed Joule-heated ceramic melters
Off-gas and effluent characterization studies have been established as part of a PNL Liquid-Fed Ceramic Melter development program supporting the Savannah River Laboratory Defense Waste Processing Facility (SRL-DWPF). The objectives of these studies were to characterize the gaseous and airborne emission properties of liquid-fed joule-heated melters as a function of melter operational parameters and feed composition. All areas of off-gas interest and concern including effluent characterization, emission control, flow rate behavior and corrosion effects have been studied using alkaline and formic-acid based feed compositions. In addition, the behavioral patterns of gaseous emissions, the characteristics of melter-generated aerosols and the nature and magnitude of melter effluent losses have been established under a variety of feeding conditions with and without the use of auxiliary plenum heaters. The results of these studies have shown that particulate emissions are responsible for most radiologically important melter effluent losses. Melter-generated gases have been found to be potentially flammable as well as corrosive. Hydrogen and carbon monoxide present the greatest flammability hazard of the combustibles produced. Melter emissions of acidic volatile compounds of sulfur and the halogens have been responsible for extensive corrosion observed in melter plenums and in associated off-gas lines and processing equipment. The use of auxiliary plenum heating has had little effect upon melter off-gas characteristics other than reducing the concentrations of combustibles.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 5795560
- Report Number(s):
- PNL-4819; ON: DE84001019
- Resource Relation:
- Other Information: Portions are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
CERAMIC MELTERS
AIR POLLUTION ABATEMENT
GASEOUS WASTES
OFF-GAS SYSTEMS
AEROSOLS
CARBON DIOXIDE
CARBON MONOXIDE
CORROSIVE EFFECTS
DATA COMPILATION
FLOW RATE
HIGH-LEVEL RADIOACTIVE WASTES
HYDROGEN
OXYGEN
PARTICLE SIZE
PARTICULATES
RADIOACTIVE WASTE PROCESSING
SOLIDIFICATION
SULFUR DIOXIDE
VITRIFICATION
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
COLLOIDS
DATA
DISPERSIONS
ELECTRIC FURNACES
ELEMENTS
FURNACES
INFORMATION
MANAGEMENT
MATERIALS
NONMETALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PHASE TRANSFORMATIONS
POLLUTION ABATEMENT
PROCESSING
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
SIZE
SOLS
SULFUR COMPOUNDS
SULFUR OXIDES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
052001* - Nuclear Fuels- Waste Processing
500300 - Environment
Atmospheric- Radioactive Materials Monitoring & Transport- (-1989)
500200 - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)