| 摘要 |
PROBLEM TO BE SOLVED: To provide an operation method for a circulated fluidized bed incinerator herein a stable combustion state and collection efficiency in a hot cyclone are not deteriorated. SOLUTION: An operation method for a circulated fluidized bed incinerator is adapted such that primary air is supplied to a fluid medium S filled in a riser 1, which is fluidized, and then secondary air is supplied from a predetermined position to force part of the fluid medium in the foregoing fluid state to rise in the riser at a superficial velocity above a terminal velocity, and a substance W to be incinerated is supplied into the fluid medium in the fluid state and is combusted and decomposed, and thereafter the fluid medium is separated in a hot cyclone 7 into a fluid medium and waste gas containing incinerated ash, the separated fluid medium is stored in a loop seal 9 trough a downcomer 8, to which stored fluid medium fluidization air is supplied for returning to the riser. In the operation method, on the loop seal and/or the downcoma a plurality of gas supply nozzles 11 for supplying air at all times are vertically provided at a predetermined interval, and a supply volume of the fluidizing air to the loop seal is controlled with the aid of a change of supply pressure of the gas from the gas supply nozzle.
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