Denitrification

The process gas is preheated in a heat exchanger using the hotter clean gas. The energy still required to reach the required catalyst inlet temperature, is supplied by a gas burner or an electric heating coil.

Following the heating device, the reagent is injected. The reagent is deposited in the catalyst and reacts with the NO and NO2 pollutants in the process gas and converts them.

After the process gas has left the catalytic converter, it flows through the heat exchanger, where it transfers some of its energy to the cold process gas to be preheated. The process gas can be discharged via the chimney using the downstream fan.

Depending on the application, a secondary heat recovery system can be connected downstream of the heat exchanger for further energy savings.

The process gas must be checked for catalyst poisons in advance, otherwise the service life of the catalyst will be reduced.