Mercury reduction system and mercury reduction method of...

Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture

Reexamination Certificate

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C423S239100, C423S243010, C423SDIG018, C422S168000, C422S169000, C422S170000, C422S171000, C422S177000, C422S180000, C422S105000, C422S111000

Reexamination Certificate

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07906090

ABSTRACT:
A mercury reduction system according to the present embodiment is a mercury reduction system that reduces NOx and Hg in flue gas discharged from a boiler, and includes an NH4Cl solution spraying unit that sprays an NH4Cl solution into a flue of the boiler in a liquid state, a mixed gas spraying unit that is provided downstream of the NH4Cl solution spraying unit and sprays mixed gas containing NH3gas and HCl gas into the flue, a reduction denitration apparatus that includes a denitration catalyst reducing NOx in the flue gas with NH3and oxidizing Hg in the presence of HCl, and a wet desulfurization apparatus that reduces Hg oxidized in the reduction denitration apparatus with a limestone-gypsum slurry.

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International Search Report of PCT/JP2009/061029, mailing date of Sep. 15, 2009.

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