System for processing mercury in flue gas
AssigneeMitsubishi Hitachi Power Systems, Ltd.
InventorsNobuyuki Ukai, Seiji Kagawa, Tatsuto Nagayasu, Takuya Okamoto
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Abstract
A system for removing Hg contained in flue gas from a boiler, the system includes: a heat exchanger for performing heat exchange of the flue gas from the boiler; a precipitator for removing soot and dust in the flue gas; a wet desulfurization device for removing mercury oxide Hg2+ in the flue gas using an alkali absorbent; and; a removal assistant supply unit for supplying a removal assistant for removing impurities into a limestone and gypsum slurry that circulates through the wet desulfurization device.
Claims7
A system for removing Hg contained in flue gas from a boiler, the system comprising:
- a heat exchanger for performing heat exchange of the flue gas from the boiler;
- a precipitator for removing soot and dust in the flue gas;
- a wet desulfurization device for removing mercury oxide Hg2+ in the flue gas with a limestone and gypsum slurry, the wet desulfurization device including a circulation line for circulating the limestone and gypsum slurry;
- a water supply line for supplying water containing reductive and humic material to the wet desulfurization device;
- and
- a removal assistant supply unit that supplies a removal assistant for removing the reductive and humic material to the water supply line or circulation line.
Dependencies are inferred from the claim text.