| 摘要 |
To provide an NO x removal catalyst management unit for use with an NO x removal apparatus, the management unit detecting an NO x removal catalyst layer that is actually deteriorated, whereby the deteriorated catalyst layer can be effectively replaced by a new catalyst layer, and to provide a method for managing the NO x removal catalyst. The management unit for managing a plurality of NO x removal catalyst layers provided in a flue gas NO x removal apparatus includes NO x measurement means 16A through 16E for determining NO x concentrations on the inlet and outlet sides of respective NO x removal catalyst layers 14A through 14D; NH3 measurement means 17A through 17E for determining NH3 concentrations on the inlet and outlet sides of the same NO x removal catalyst layers; and percent NO x removal determination means 18 for determining percent NO x removal (.eta.) on the basis of an inlet mole ratio (i.e., inlet NH3/inlet NO x).
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