| 摘要 |
PURPOSE:To prevent a checker bracket from receiving dew point corrosion due to sulfuric acid by introducing part of the air heated in a hot stove into the cold wind prior to heating, and allowing the same to ascend thereby maintaining the temp. of the checker bracket higher than a dew point temp. CONSTITUTION:An ejector 13 is provided by opening the same in the backflow direction within a cold wind tube 12 for feeding cold wind into a hot stove. A hot wind mixing tube 18 is connected through a hot wind mixing valve 19 to the ejector 13 and the preceding end of a compressible gas supply pipe 17 is placed to face the ejector, While cold wind is supplied into the tube 12, compressed air is fed and ejected from the tube 17 to the ejector 13 and the hot wind is sucked from the tube 18 by the negative pressure developed by said ejection. The temp. of the hot wind is measured with a temp. detector 20, and the opening of the valve 19 is regulated with a temp. controller 21 whereby the temp. of the cold wind to be fed into the hot stove is maintained above the dew point corrosion temp. (about 170-180 deg.C) and constant. Thus the corrosion of the checker bracket is prevented. |
