Combined exhaust gas treatment of ammonia and nitrogen oxide-containing waste gas streams in industrial plants

摘要

A method for the combined removal of both ammonia in one or more ammonia-containing waste streams and nitrogen oxides in one or more additional nitrogen oxide-containing waste gas streams in an industrial plant, after the selective non-catalytic reduction in a temperature range of 850 ° C to 1100 ° C, with which nitrogen oxide degradation rates of up to 80% are achieved or after the selective catalytic reduction in a temperature range of 150 ° C to 550 ° C, with which nitrogen oxide degradation rates of up to 99% can be achieved, the ammonia and the Nitrogen oxides react with each other and are converted into nitrogen and water, with separate existing in the industrial plant exhaust gas streams, of which at least one ammonia-containing and at least one nitrogen oxide-containing, mixed and depending on the temperature of the mixture and depending on the degradation rate to be achieved the nitrogen oxides a selective non-catalytic Redukti on or a selective catalytic reduction is carried out, wherein both the ammonia and the nitrogen oxides of the mixed exhaust gas streams are simultaneously degraded in the same process step.