Fate of trace elements in a 2000-MW coal-fired power station: PISCES Site 131 field chemical emissions monitoring program emissions report. Final report

Technical Report · Mon Apr 01 04:00:00 EST 1996

OSTI ID:270709

Clarke, F; Price, H J ^[1]

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1. Powergen - Ratcliffe Technology Centre, Nottingham (United Kingdom)

As part of the Field Chemical Emissions Monitoring (FCEM) program, PowerGen and EPRI have sponsored research to determine the fate of trace element emissions from Site 131--a 2000-MW pulverized-coal-fired-power plant. Three plant configurations were investigated on units employing (1) low-NOx burners, (2) conventional burners, and (3) conventional burners with an improved electrostatic precipitator (ESP) and a new wet flue gas desulfurization (FGD) system. The majority of fractional closures were good for most trace elements and were within the project goals of being able to account for 70--130% of the inlet feed in the emission streams. Comparison between the analyses of the precipitator outlet dusts shows little variation, other than that attributable to the original coal composition. As expected, the improved precipitators and new FGD along with a consequent reduction in dust burden, markedly decreased the mass emission of metals in the solid phase. Removal efficiencies of 65--95% were achieved across the FGD system for the vapor phase trace elements (mercury, selenium, chlorine, and fluorine). Moreover, the use of a new FGD system reduced the final stack emissions, with the majority of species concentrating in the sludge phase. Finally, organic emissions measured, including dioxins and furans, were very low and in most cases near the method detection limit. The results from Site 131 would be most applicable for utilities burning the same type of fuel at a power plant with a similar ESP and a wet FGD control system.

• Research Organization: Electric Power Research Inst., Palo Alto, CA (United States); Powergen - Ratcliffe Technology Centre, Nottingham (United Kingdom)
• Sponsoring Organization: Electric Power Research Inst., Palo Alto, CA (United States)
• OSTI ID: 270709
• Report Number(s): EPRI-TR--105645
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
20 FOSSIL-FUELED POWER PLANTS
AIR POLLUTION MONITORING
ALDEHYDES
BURNERS
CHEMICAL COMPOSITION
COAL
COMBUSTION
COMPARATIVE EVALUATIONS
COMPILED DATA
ELEMENTS
FLY ASH
FOSSIL-FUEL POWER PLANTS
MASS BALANCE
POLLUTION CONTROL EQUIPMENT
POLYCYCLIC AROMATIC HYDROCARBONS
TRACE AMOUNTS