Impact of free calcium oxide content of fly ash on dust and sulfur dioxide emissions in a lignite-fired power plant
- Agios Dimitrios Power Plant, Ptolemais (Greece). Public Power Corporation of Greece
Emitted pollutants from the Agios Dimitrios lignite-fired power plant in northern Greece show a very strong linear correlation with the free calcium oxide content of the lignite ash. Dust (fly ash) emissions are positively correlated to free calcium oxide content, whereas sulfur dioxide (SO{sub 2}) emissions are negatively correlated. As a result, at present, the Agios Dimitrios Power Plant operates very strictly within the legislative limits on atmospheric particulate emission. In the study reported, the factors to be considered in assessing the impact of lignite combustion on the environment are presented and evaluated statistically. The ash appears to have a remarkable SO{sub 2} natural dry scrubbing capability when the free calcium oxide content ranges between 4 and 7%. Precipitator operating problems attributable to high ash resistivity can be overcome by injecting sulfur trioxide to reduce the ash resistivity, with, of course, a probable increase in operating costs. 27 refs., 7 figs., 1 tab.
- OSTI ID:
- 20638634
- Journal Information:
- Journal of the Air and Waste Management Association, Vol. 55, Issue 7; ISSN 1047-3289
- Country of Publication:
- United States
- Language:
- English
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