| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To accurately adjust an exhaust gas temperature of a temperature reducing tower outlet to a set temperature without humidifying dust in exhaust gas. <P>SOLUTION: The gas outlet temperature control device for the temperature reducing tower is provided with injection nozzles arranged in two tiers with a predetermined interval in a flowing direction in a gas inlet side of the temperature reducing tower leading exhaust gas in from a gas inlet and leading the exhaust gas from a gas outlet, flow regulating valves respectively provided in the injection nozzles, a temperature detector installed in the gas outlet, and a controller inputted with a detected temperature 17 of the temperature detector, adjusting an opening of one flow regulating valve on the basis of change of an average value T<SB>1</SB>of the detected temperature 17 of the temperature detector within a narrow width detection time S<SB>1</SB>set at a short time interval, and adjusting an opening of the other flow regulating valve on the basis of change of an average value T<SB>2</SB>of the detected temperature 17 within a wide width detection time S<SB>2</SB>set at a long interval. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
