| 摘要 |
PROBLEM TO BE SOLVED: To provide a powder production apparatus in which upper and lower variation of a pressure at the inside of a power production column by a flame spray pyrolysis is small. SOLUTION: The powder production apparatus 1 has an air-tightly closed cylindrical powder production column 2; a spraying means 3 for spraying an aqueous material solution into the inside of the powder production column 2; a conveying gas flow passage 5 for feeding a conveying gas from a periphery of the spraying means 3 to the inside of the powder production column 2; a flame injection nozzle 7 for injecting the flame to the inside of the powder production column 2; and an exhaust apparatus for discharging a gas in the powder production column 2 therefrom. An outside air flow passage 18 released to the outside is provided on a negative pressure part 16 becoming a negative pressure relative to the outside in the steady state of the conveying gas flow passage 5. COPYRIGHT: (C)2007,JPO&INPIT
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