| 摘要 |
In the present invention there is disclosed an apparatus with a reactor (4) for treating flue gases by irradiation with electron beams in order to remove nitrogen oxides and/or sulfur oxides therefrom. Ammonia is added at a position in the direction of the flue gas stream that is upstream of the center of electron beams applied within the reactor (4) and which is not more than 2.5 times the range of electron beams, preferably not more than 2.0 times, more preferably not more than 1.5 times, most preferably from 0.5 to 1.0 times said range. Ammonia is supplied in any one of the following ways; (1) only ammonia is supplied; (2) both ammonia and air are supplied; (3) both ammonia and water are supplied; and (4) ammonia, air and water are all supplied. From an operational viewpoint, ammonia is preferably supplied as diluted in the form of a mixture of heated ammonia and dry air (having preferably a dew point of -15 degC or less at pressure of 0.1 MPa). It is also effective to supply ammonia through pipes that are arranged to contour the spherical divergence of electron beams.
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