| 摘要 |
PROBLEM TO BE SOLVED: To provide a high temperature corrosion reducing device for a circulation fluidized bed boiler, allowing highly efficient power generation by avoiding problems with high temperature corrosion at an external heat exchanger. SOLUTION: The circulation fluidized bed boiler comprises a furnace 1 having a fluidized bed, a particle trapping device 2 for introducing particles discharged from the furnace along with combustion gas and trapping the particles to be discharged from the lower part, and a circulation system for circulating the particles trapped/discharged by the particle trapping device 2 via the external heat exchanger 501 into the furnace 1. The circulation system has a first fluidized bed 3, a second fluidized bed 4 and a third fluidized bed 5 consisting of spaces partitioned with mutually common partition walls. COPYRIGHT: (C)2004,JPO&NCIPI
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