Method for restoring performance capabilities of exhaust gas...

B - Operations – Transporting – 01 – D

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B01D 53/96 (2006.01)

Patent

CA 2548444

To provide a method for recovering performance of a discharge gas processing apparatus, the method being capable of recovering NO x removal performance of a deteriorated NO x removal catalyst without replacing the deteriorated NO x removal catalyst with a new catalyst and without adding a new catalyst. After a honeycomb catalyst 1 having gas conduits for feeding a gas to be treated has been placed and used in a discharge gas conduit of a discharge gas processing apparatus 10, the honeycomb catalyst 1 is rearranged such that a portion of the honeycomb catalyst 1 the portion being on the upstream side in terms of the flow of the gas to be treated and extending to cover a predetermined range is transferred from the inlet side of the discharge gas conduit.

Cette invention concerne une méthode de restauration des caractéristiques de marche d'un dispositif de traitement des gaz d'échappement (10), consistant à disposer un catalyseur eu nid d'abeille (1) avec écoulement des gaz à traiter dans le chemin des gaz d'échappement du dispositif (10), à traiter les gaz d'échappement par catalyse, puis à réagencer le catalyseur en nid d'abeille (1) de telle sorte que la partie dudit catalyseur comprenant une zone déterminée depuis le côté amont (dans le sens de l'écoulement des gaz) dans le sens de l'écoulement des gaz soit transférée depuis le côté de l'entrée des gaz à traiter. Cette méthode permet de restaurer la capacité de dénitration d'un catalyseur de dénitration détérioré sans devoir remplacer ce dernier ou monter un catalyseur supplémentaire.

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