| 摘要 |
PROBLEM TO BE SOLVED: To provide a circulation fluidized bed boiler for reducing corrosion to be generated in a heat exchanger tube of an external heat exchanger. SOLUTION: The circulation fluidized bed boiler 1 comprises a furnace 2 for burning a fuel being fluidized together with a bed material 11, a cyclone 3 into which exhaust gas generated by burning in the furnace 2 is introduced, for trapping particles contained in the exhaust gas, a regenerating loop 13 into which the particles trapped by the cyclone 3 is first introduced, and the external heat exchanger 6 for performing heat exchange between the particles and itself. Such a system contains the regenerating loop 13 for preventing corrosion factorial materials from flowing into the external heat exchanger in burning the unburnt fuel in the particles. COPYRIGHT: (C)2003,JPO
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