| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a denitrator and a denitration method that can sufficiently eliminate NOx even if a catalyst used for catalytic denitration is deteriorated. <P>SOLUTION: The denitrator 100 carrying out noncatalytic denitration and catalytic denitration to exhaust gas from a boiler 1 is adapted to store the load of the boiler 1 and the amount of NH<SB POS="POST">3</SB>injected by a first NH<SB POS="POST">3</SB>injection part 7, beforehand as a first correlative relationship, to control the amount of NH<SB POS="POST">3</SB>injected by the first NH<SB POS="POST">3</SB>injection part 7 according to the load of the boiler 1, to store the load of the boiler 1 and inlet NOx concentration C<SB POS="POST">in</SB>which is the concentration of NOx on the inlet side of a denitration catalyst installation part 9, beforehand as a second correlative relationship, to predict inlet NOx concentration C<SB POS="POST">in</SB>according to the load of the boiler 1, to control the amount of NH<SB POS="POST">3</SB>injected by a second NH<SB POS="POST">3</SB>injection part 8 based on the inlet NOx concentration C<SB POS="POST">in</SB>and to adjust the injection amount of NH<SB POS="POST">3</SB>by rewriting the first correlative relationship and the second correlative relationship according to deterioration when detecting the deterioration of the denitration catalyst. <P>COPYRIGHT: (C)2013,JPO&INPIT |
