Abstract: A method for regenerating an NOx removal catalyst, the method being capable of readily restoring the catalytic activity of a deteriorated NOx removal catalyst; being performed by simple operations; and attaining high operational efficiency. The method for regenerating an NOx removal catalyst 14 employed in a flue gas NOx removal apparatus includes immersing the NOx removal catalyst at ambient temperature in regeneration water 31 containing substantially no chlorine and no cleaning component; removing the catalyst from the regeneration water; and removing water from the catalyst.

Abstract: To provide an NOx removal catalyst management unit for use with an NOx removal apparatus, the management unit detecting an NOx 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 NOx removal catalyst. The management unit for managing a plurality of NOx removal catalyst layers provided in a flue gas NOx removal apparatus includes NOx measurement means 16A through 16E for determining NOx concentrations on the inlet and outlet sides of respective NOx 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 NOx removal catalyst layers; and percent NOx removal determination means 18 for determining percent NOx removal (?) on the basis of an inlet mole ratio (i.e., inlet NH3/inlet NOx).

Abstract: The present invention provides a honeycomb catalyst and an NOx removal catalyst for use in an NOx removal apparatus which can be employed at high efficiency, and a flue gas NOx removal apparatus, whereby the running cost of a flue gas NOx removal system in terms of the NOx removal catalyst is reduced by about one-half. The honeycomb catalyst having gas conduits for feeding a gas to be treated from an inlet to an outlet of each conduit and performing gas treatment on the sidewalls of the conduit, wherein the honeycomb catalyst has an approximate length such that the flow of the gas to be treated which has been fed into the gas conduits is straightened in the vicinity of the outlet.

Abstract: The present invention provides a honeycomb catalyst and an NOx removal catalyst for use in an NOx removal apparatus which can be employed at high efficiency, and a flue gas NOx removal apparatus, whereby the running cost of a flue gas NOx removal system in terms of the NOx removal catalyst is reduced by about one-half. The honeycomb catalyst having gas conduits for feeding a gas to be treated from an inlet to an outlet of each conduit and performing gas treatment on the sidewalls of the conduit, wherein the honeycomb catalyst has an approximate length such that the flow of the gas to be treated which has been fed into the gas conduits is straightened in the vicinity of the outlet.

Abstract: To provide an NOx removal catalyst management unit for use with an NOx removal apparatus, the management unit detecting an NOx 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 NOx removal catalyst. The management unit for managing a plurality of NOx removal catalyst layers provided in a flue gas NOx removal apparatus includes NOx measurement means 16A through 16E for determining NOx concentrations on the inlet and outlet sides of respective NOx 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 NOx removal catalyst layers; and percent NOx removal determination means 18 for determining percent NOx removal (?) on the basis of an inlet mole ratio (i.e., inlet NH3/inlet NOx).

Abstract: To provide a method for regenerating an NOx removal catalyst, the method being capable of readily restoring the catalytic activity of a deteriorated NOx removal catalyst; being performed by simple operations; and attaining high operational efficiency. The method for regenerating an NOx removal catalyst 14 employed in a flue gas NOx removal apparatus includes immersing the NOx removal catalyst at ambient temperature in regeneration water 31 containing substantially no chlorine and no cleaning component; removing the catalyst from the regeneration water; and removing water from the catalyst.