| 摘要 |
PROBLEM TO BE SOLVED: To provide a characteristic analysis method for a circulation fluidized bed boiler capable of effecting a more correct dynamic characteristic analysis on a circulation fluidized bed boiler having as a primary element an ash circulation system, particularly a circulation fluidized bed boiler holding a fluidized bed comprising circulation ash having a feature of a complicated thermal behavior and using a medium temperature cyclone. SOLUTION: In a circulation fluidized bed boiler holding a fluidized bed and having a medium temperature cyclone, an ash circulation characteristic formula that represents waste time and delay in a passage from the time when ash discharged out of a boiler furnace and including an unburned matter is collected by the medium temperature cyclone until the time when the collected ash is recharged into the furnace or information on quantity of the unburned matter in the circulation ash is taken in for analysis. An equation applied by an exponent (n) as a power to an ash flow rate passing through a heat transfer face is used to energy balance, and matching to an analysis target boiler is made by adjusting the exponent (n).
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