Abstract: In a method for operating a flue gas purification plant (10) including a plurality of parallel of absorber chambers (11), in which in each absorber chamber (11), CO and NO are simultaneously oxidized by a catalyst in a first absorber (15) according to the SCONOx principle and the resulting NO2 is absorbed on the catalyst surface, in which SO2 is furthermore oxidized by a catalyst in a second absorber (14) upstream of the first absorber (15) according to the SCOSOx principle and the resulting SO3 is absorbed on the catalyst surface. The absorber chambers (11) are successively regenerated by a regeneration gas containing hydrogen and/or hydrogen compounds in regularly repeating regeneration cycles affecting all the absorber chambers (11). In order to improve reliability and reduce operating costs in such a method, the regeneration time of the second absorber (14) within the regeneration cycle is respectively selected to be long enough to guarantee sufficient regeneration of the second absorber (14).

Abstract: In a method for operating a flue gas purification plant (10) with at least one absorber chamber (11), in which CO and NO are simultaneously oxidized by means of a catalyst in a first absorber (15) according to the SCONOx principle and the resulting NO2 is absorbed on the catalyst surface, and in which SO2 is furthermore oxidized by means of a catalyst in a second absorber (14) upstream of the first absorber (15) according to the SCOSOx principle and the resulting SO3 is absorbed on the catalyst surface, the absorber chamber (11) is disconnected from the flue gas stream in regularly repeating regeneration cycles and regenerated by means of a regeneration gas containing hydrogen and/or hydrogen compounds, the two absorbers (14, 15) of the absorber chamber (11) being regenerated in succession and regeneration gas being injected into the absorber chamber (11) between the two absorbers (14, 15).

Abstract: In a method for operating a flue gas purification plant (10) comprising a plurality of parallel of absorber chambers (11), in which in each absorber chamber (11), CO and NO are simultaneously oxidized by means of a catalyst in a first absorber (15) according to the SCONOx principle and the resulting NO2 is absorbed on the catalyst surface, in which SO2 is furthermore oxidized by means of a catalyst in a second absorber (14) upstream of the first absorber (15) according to the SCOSOx principle and the resulting SO3 is absorbed on the catalyst surface, the absorber chambers (11) are successively regenerated by means of a regeneration gas containing hydrogen and/or hydrogen compounds in regularly repeating regeneration cycles affecting all the absorber chambers (11).

Abstract: In a method of operating a flue gas purifying plant (10) having at least one absorber chamber (11) in which CO and NO are oxidized simultaneously by means of a catalyst in a first absorber (15) according to the SCONOx principle and the resulting NO2 is absorbed on the catalyst surface, and in which, furthermore, SO2 is oxidized by means of a catalyst in a second absorber (14) connected upstream of the first absorber (15) according to the SCOSOx principle and the resulting SO3 is absorbed on the catalyst surface, the absorber chamber (11) is separated from the flue gas flow in regularly recurring regeneration cycles and is regenerated by means of a regeneration gas containing hydrogen, the two absorbers (14, 15) of the absorber chamber (11) being regenerated one after the other.