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    • 9. 发明专利
    • Boiler plant
    • JP5281871B2
    • 2013-09-04
    • JP2008288047
    • 2008-11-10
    • バブコック日立株式会社
    • 良晃 三井典幸 今田浩 石坂浩之 野坂
    • F23C9/08F23J15/00F23L7/00
    • Y02E20/344
    • PROBLEM TO BE SOLVED: To downsize desulfurization equipment with high SOx removal efficiency, and to suppress corrosion of piping, etc. of a circulation system. SOLUTION: A boiler plant includes: an oxygen burning type boiler 1 for burning fuel by oxygen-rich combustion gas; NOx removal equipment 5 for removing nitrogen oxides in exhaust gas discharged from the boiler 1; a dust collector 9 for collecting soot and dust in exhaust gas discharged from the NOx removal equipment 5; first desulfurization equipment 13 for removing sulfur oxides in exhaust gas discharged from the dust collector 9; an exhaust gas circulation path 19 for branching exhaust gas on the upstream side of the first desulfurization equipment 13, mixing the branched exhaust gas with oxygen supplied from an oxygen supply device 23 to generate combustion gas and supplying the combustion gas to the boiler 1; and second desulfurization equipment 15 for removing sulfur oxides in exhaust gas on the upstream side of a branch part 17 of the exhaust gas of the exhaust gas circulation path 19. Exhaust gas is desulfurized on the upstream side of the branch part 17. COPYRIGHT: (C)2010,JPO&INPIT