US 2015/0265965 A1

Flue gas treatment apparatus and flue gas treatment method

(22) 28.11.2013

(43) 24.09.2015

(57) A flue gas treatment apparatus for removing sulfur contents contained in combustion flue gas, includes a treatment agent feeder to feed a treatment agent into a flue through which the combustion flue gas flows, a cooler to cool the combustion flue gas to which the treatment agent has been fed and condense SO3 components in the combustion flue gas, an electric dust collection apparatus provided in the flue, a desulfurization apparatus based on a lime-gypsum process, and a circulation line for feeding a portion of the dust particles recovered by the electric dust collection apparatus into the flue that is provided on an upstream side of the cooler in the direction of flow of the flue gas for circulated use thereof as the treatment agent.

(71) Mitsubishi Hitachi Power Systems, Ltd., Yokohama-shi, Kanagawa (JP)

(73) Mitsubishi Hitachi Power Systems, Ltd., Yokohama-shi, Kanagawa (JP)

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