| 摘要 |
In the reduction of nitrogen oxides in flue gases from (especially refuse) incinerators by the SCR process in a DENOX reactor, the flue gas is cooled to a predetermined temperature in an economiser stage (5), before entering the DENOX reactor (10). After treatment in the DENOX reactor, the flue gas is further cooled to a predetermined temperature in a second economiser stage (11) connected on the water side with the first (5). The first economiser stage (5) is formed by two economiser packets (6,7) connected to one another in parallel on the water side, with each economiser packet in its own flue gas duct (3,4). The entry to the waste gas ducts (3,4) is formed by a gas diverting damper (2). When the incinerator is operating below a predetermined part load, the damper is moved from the open to the closed position and thus closes one of the gas ducts (3,4).When the incinerator is operating at a load above the predetermined part load, the damper is opened to open both flue gas ducts (3,4). Also claimed is a plant for the above process. |
