| 摘要 |
PROBLEM TO BE SOLVED: To provide a denitrification equipment which enables keeping denitrification performance over a long term, is excellent in efficiency and is economical, and a maintenance method in denitrification equipment. SOLUTION: Regenerated catalyst 60 is disposed on the downstream side where the conditions of deterioration wear is relatively moderate and the extent of contribution of denitrification performance is relatively small, for example, in a reactor 53 at a third step. As a result, the deterioration wear of the regenerated catalyst 60 can be suppressed and, further, the denitrification performance of the regenerated catalyst 60 can be kept over a long term. Thereby, even if the regenerated catalyst 60 is used, the denitrification performance can be kept over a long term, and in addition, the reuse of regenerated catalyst 60 results in excellent efficiency and economical effects. |
