On-site field tests for study of low-rank western coal fly ash

Technical Report · Wed Aug 01 04:00:00 EDT 1984

OSTI ID:6230722

Dahlin, R S; Marchant, Jr, G H; Gooch, J P; Bickelhaupt, R E; Sears, D R

This report describes a series of field and laboratory studies of the characteristics and control of fly ash emissions from low-rank Western coals. Field tests were conducted at three pulverized coal-fired utility boilers burning low-rank Western coals. Each field test included: measurements of the mass concentrations of fly ash suspended in the flue gas at the inlet and outlet of the particulate collector and determination of the overall fly ash collection efficiency, measurements of the inlet and outlet particle size distributions of the fly ash and determination of the fractional collection efficiency, measurements of the electrical resistivity of the ash, documentation of the operating conditions of the boiler and the particulate collector, analysis of the important flue gas components, and collection of coal and ash samples for various laboratory studies. The laboratory work that was done in conjunction with each field test included: proximate and ultimate analyses of the coal, chemical analysis of the fly ash, measurements of ash resistivity as a function of temperature and flue gas environment, and detailed microanalytical characterization of individual ash particles. The bulk physical and chemical characteristics of these ashes are described in detail in the report, and microanalytical characterizations of individual ash particles are presented. The latter show some very interesting correlations between elemental composition and particle size and between one element and another. The potential uses of these data are discussed, and areas that require further investigation are identified. It is concluded that the fly ash emissions from low-rank Western coals can be effectively controlled with existing technology if the particulate collector is properly designed and operated; ash resistivity can be predicted; a better understanding of ash-flue gas interactions is needed. 33 references, 46 figures, 17 tables.

• Research Organization: Southern Research Inst., Birmingham, AL (USA)
• DOE Contract Number: AC18-80FC10225
• OSTI ID: 6230722
• Report Number(s): DOE/FC/10225-1650; ON: DE84017054
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AEROSOL WASTES
AIR POLLUTION CONTROL
ASHES
BENCH-SCALE EXPERIMENTS
BOILERS
CARBONACEOUS MATERIALS
CHEMICAL COMPOSITION
COAL
CONTROL
DATA
EFFICIENCY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY SOURCES
EQUIPMENT
EXPERIMENTAL DATA
FIELD TESTS
FLUE GAS
FLY ASH
FOSSIL FUELS
FUELS
GASEOUS WASTES
INFORMATION
MATERIALS
NUMERICAL DATA
PARTICLE SIZE
PARTICLES
PARTICULATES
PHYSICAL PROPERTIES
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
RESIDUES
SIZE
TESTING
WASTES