Patent ID: 7595033
Filing Date: 2009-09-29
Classification: B01D,F23J,Y10S

Abstract:
1. A process for purifying flue gases in refuse incineration plants during regeneration of a catalyst which serves for reducing nitrogen oxides, in which, in running refuse operation, a) acidic pollutant gases are removed from the flue gas in a wet, semi-dry or dry manner, b) ammonia for reducing nitrogen oxides is added to the flue gas purified in step a), c) the flue gas from step b) which is admixed with ammonia is fed to a catalyst, with the catalyst being heated for the regeneration at a controlled heat-up rate, which leads to liberation of ammonia, with the amount of ammonia added in step b) and the heat-up rate in step c) being controlled by the concentration of a command variable selected from the group of ammonia and nitrogen oxide which the flue gas purified according to step c) contains.