| 摘要 |
PROBLEM TO BE SOLVED: To stably operate a hot air fan, by preventing an overload stop of the hot air fan caused by temperature change of an exhaust gas generated from a third combustion furnace, the generation of vibration of the hot air fan caused by rapid temperature rise of the exhaust gas, and the like. SOLUTION: A temperature of the exhaust gas G3 generated in the third combustion furnace 3 and supplied to the hot air fan 14 is detected by a temperature detecting means 18, and the intake quantity of the hot air fan 14 is adjusted by controlling electric current for operating the hot air fan on the basis of the temperature to stably operate the hot air fan 14. COPYRIGHT: (C)2007,JPO&INPIT
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