PURPOSE: To absorb the generated pulsation of the amount of fine powder to be fed and to uniformize the flow thereof by circulating fine powder as a powdery fluid between a storage drum and a circulation duct and feeding the powdery fluid to plural nozzles through plural discharge provided to the side wall of the storage drum.
CONSTITUTION: Fine powder F which is quantitatively fed by a quantitative feeder 8 under the pressurizing conditions of prescribed pressure is transferred to the inside of a mixing ejector 7 via a transfer pipe 9 for fine powder. It is mixed with the air flow fed from a circulating blower 5, dispersed and introduced into a storage drum 1 as a powdery fluid and circulated via a circulation duct 6 while keeping a uniform aerosol state. The powdery fluid incorporated in the storage drum 1 is introduced into a furnace 12 through nozzle 13 via transfer 10 for the powder fluid from plural pieces of discharge ports 4. The powdery fluid is uniform aerosol having definite concn. and the amount of fine powder to be fed can be easily and precisely controlled in accordance with the nonequilibrium of flow rate and volume due to the pipeline difference or the like of the transfer pipes 10.
KIKUCHI KIYOETSU
ISHIDA MICHIO
SANO JUNICHI
MIURA YOSHIMASA
