Environmental Regulation Trend and Measurement Technology of Trace Elements in Coal Combustion Plant

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  • NODA Naoki
    Central Research Institute of Electric Power Industry

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  • 石炭火力プラントにおける微量物質の環境規制動向と計測技術
  • セキタン カリョク プラント ニ オケル ビリョウ ブッシツ ノ カンキョウ キセイ ドウコウ ト ケイソク ギジュツ

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<p>Coal is an important energy resource for meeting the further demand for electricity, as coal reserves are much more abundant than those of other fossil fuels. Coal contains heavy metal in a very small amount other than major components. Most of heavy metal which is called trace elements in coal is collected to flue gas treatment equipment such as electrostatic precipitator and flue gas desulfurization equipment. But emission ratio to air of the highly volatile elements such as mercury is higher than other element. Recently, emissions of trace elements from coal combustion have been viewed as a global environmental issue. Mercury, selenium, boron are highly volatile among trace elements included in the coal, and the behavior in the plant is very complicated. In this paper, for mercury, selenium and boron, an outline of a domestic environmental regulation trend, the behavior in coal combustion plant and measurement technology is explained.</p>

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