| 摘要 |
PROBLEM TO BE SOLVED: To provide a fluidized bed boiler capable of stabilizing external circulation of a fluid material and combustion properties of fuel by preventing the fluid material from being retained at a fluid material outlet. SOLUTION: The fluidized bed boiler 1 includes an external circulation type fluidized bed furnace 10 supplying and burning the fuel in a combustion chamber 11 through which the fluid material is circulated, and a cyclone 20 connected to the fluidized bed furnace 10 to separate gas for combustion gas mainly from a solid of the fluid material. The fluid material separated in the cyclone 20 is returned to the fluidized bed furnace 10 through a seal pot part 2 and a high temperature particle circulation line 5, and a pressure equalizing pipe 40 is provided for allowing communication between the upper part of the seal pot part 2 connected to the fluid material outlet 23 of the cyclone 20, and the lower part of the cyclone 20. COPYRIGHT: (C)2010,JPO&INPIT
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