| 摘要 |
PROBLEM TO BE SOLVED: To provide a circulating fluidized bed boiler capable of solving a problem on high-temperature corrosion of an external heat exchanger, and realizing high efficiency in power generation. SOLUTION: In this circulating fluidized bed boiler device comprising a furnace 1 having a fluidized bed, a first cyclone 2 introducing combustion gas of high temperature from the furnace and collecting particles discharged following the combustion gas, a convection heat transfer part 8 generating steam by heat exchanging, by supplying the combustion gas with particles separated in the first cyclone 2, and a circulating line for introducing the particles separated in the first cyclone 2, recovering the heat therefrom and returning the particles to the furnace 1, four fluidized bed sections composed of spaces sectioned by common partitioning walls 300, 400, 500 are defined on the circulating line, air inlet ports 302, 401, 501, 602 are formed on the respective sections, and the efficiency in collecting chlorine-containing dust by the cyclones 2, 7 is increased by properly setting a flow rate of the introduced air, thus high-temperature corrosion of boiler tubes connected with power generating equipment is prevented. COPYRIGHT: (C)2006,JPO&NCIPI
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