A technique for predicting fly ash resistivity. Final report, November 1975-May 1979
Technical Report
·
OSTI ID:5577986
The report gives results of research to develop a technique for predicting: the electrical resistivity of fly ash from as-received, ultimate coal analysis; and the chemical composition of the concomitant coal ash produced by simple laboratory ignition. Important chemical factors are the alkali metals, alkaline earths, and iron (with respect to the fly ash), and the water and sulfur trioxide concentrations in the flue gas. Many fly ash samples were evaluated to minimize variations due to physical effects. The effects of fly ash chemical composition, ash layer field strength, and the water and sulfur trioxide concentrations in the test environment were evaluated with respect to electrical resistivity and the evaluated parameters for the entire temperature spectrum of interest. Equipment and techniques were developed to obtain the required data. Predicted sensitivity as a function of temperature was favorably proof-tested using data acquired from previous field evaluations of precipitators at six power generating stations. The proof test involved a comparison of predicted resistivity, laboratory measured resistivity, resistivity measured in situ, precipitator efficiency, and current density of the precipitator outlet fields.
- Research Organization:
- Southern Research Inst., Birmingham, AL (USA)
- OSTI ID:
- 5577986
- Report Number(s):
- PB-80-102379
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
20 FOSSIL-FUELED POWER PLANTS
200202* -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
AEROSOL WASTES
AIR POLLUTION CONTROL
CARBONACEOUS MATERIALS
CHALCOGENIDES
COAL
COMBUSTION PRODUCTS
COMPUTER CODES
EFFICIENCY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROSTATIC PRECIPITATORS
ENERGY SOURCES
EQUIPMENT
FLY ASH
FORTRAN
FOSSIL FUELS
FOSSIL-FUEL POWER PLANTS
FUELS
INDUSTRIAL WASTES
LABORATORY EQUIPMENT
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
POWER PLANTS
PROGRAMMING LANGUAGES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SURFACES
THERMAL POWER PLANTS
WASTES
200202* -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
AEROSOL WASTES
AIR POLLUTION CONTROL
CARBONACEOUS MATERIALS
CHALCOGENIDES
COAL
COMBUSTION PRODUCTS
COMPUTER CODES
EFFICIENCY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROSTATIC PRECIPITATORS
ENERGY SOURCES
EQUIPMENT
FLY ASH
FORTRAN
FOSSIL FUELS
FOSSIL-FUEL POWER PLANTS
FUELS
INDUSTRIAL WASTES
LABORATORY EQUIPMENT
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
POWER PLANTS
PROGRAMMING LANGUAGES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SURFACES
THERMAL POWER PLANTS
WASTES