| 摘要 |
PURPOSE:To permit an effective activation of a denitrification catalyst by spraying a mixture of corn media and air uniformly and efficiently at a high speed against the catalyst to remove an inactivated layer from the surface thereof. CONSTITUTION:The corn media 5 having a particle diameter of about 0.2-0.8mm is sprayed from a spray nozzle 3 against the end face of the opening of the denitrification catalyst 7 having a length of about 1000mm at a maximum which is used for reducing the nitrogen oxides contained in the exhaust gases from a boiler, etc., in the presence of ammonia and whose activity is lowered by the harmful substances in the exhaust gases to the catalyst in its reduction process with a distance X of 500-1000mm between the nozzle and the catalyst opening and under a nozzle pressure of 1-3kg/cm<2>G in order to remove an inactivated layer from the denitrification catalyst. This method permits an effective activation of the denitrification catalyst and a reduction in the activation costs. |
