PISCES field chemical emissions monitoring project: Site 122 emissions report. Final report

Technical Report · Fri Dec 01 04:00:00 EST 1995

OSTI ID:257374

This report describes the results of a project to measure certain chemical emissions at the coal-fired steam plant known as PISCES Site 122. The three units of Site 122 are fired with an Eastern bituminous coal. Unit 1 was the subject of this investigation; like the other two units, Unit 1 operates with a boiler of the cyclone type, and it controls emissions with a cold-side electrostatic precipitator (ESP). The unit controls only emissions of particulate matter, with a cold-side ESP. It does not have any feature for controlling either sulfur or nitrogen oxides. The emission measurements were concerned with the following components of the flue gas: trace metals; acid gases; aldehydes; volatile organic compounds; and dioxins and furans. Analyses of flue gas streams at the inlet and outlet of the ESP indicate that with two exceptions the trace metals are controlled to the same degree, approximately, as the total particulate matter -- about 93--94%. Two trace metals (Hg and Se) not controlled as effectively as the balance occur to a significant degree in the vapor state. A substantial fraction of nearly each metal, in addition to that removed in the ESP, is discharged with the bottom ash or slag, which represents roughly 75% of the mass of ash in the coal. The acid gases HF, HCl, and SO{sub 2} escape essentially without control, in the gas exiting the plant through the stack. The fourth acid gas, H{sub 3}PO{sub 4}, on the other hand, is chemically neutralized by the ash, and the resulting phosphate is discharged primarily in the ash. Neither aldehydes nor dioxins and furans occur at significant concentrations. Benzene and toluene were found in the gas exiting the ESP at apparent concentrations of 12 and 3 {micro}g/Nm{sub 3}.

• Research Organization: Electric Power Research Inst., Palo Alto, CA (United States); Southern Research Inst., Birmingham, AL (United States)
• Sponsoring Organization: Electric Power Research Inst., Palo Alto, CA (United States)
• OSTI ID: 257374
• Report Number(s): EPRI-TR--105642
• Country of Publication: United States
• Language: English

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01 COAL, LIGNITE, AND PEAT
20 FOSSIL-FUELED POWER PLANTS
AIR POLLUTION MONITORING
ARSENIC
BARIUM
BENZOFURANS
BERYLLIUM
BITUMINOUS COAL
CADMIUM
CHROMIUM
COBALT
COMBUSTION
COMPILED DATA
CYCLONE COMBUSTORS
ELECTROSTATIC PRECIPITATORS
FLUE GAS
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FORMALDEHYDE
FOSSIL-FUEL POWER PLANTS
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HYDROCHLORIC ACID
HYDROFLUORIC ACID
LEAD
MANGANESE
MERCURY
NICKEL
PHOSPHORIC ACID
SELENIUM
SULFUR DIOXIDE
TOXIC MATERIALS
TRACE AMOUNTS
VANADIUM
VOLATILE MATTER