DeNOx-plant

nitrogen oxides emerge during the combustion of waste or inside a diesel engine. This oxides are harmful for the ozon layer. With ammonia (NH3) and a catalyst it is possible to reduce the nitrogen oxides.

 

A chemical reaction can be:

 

4NO   + 4NH3 + O2 --> 4N2 + 6H2O

2NO2 + 4NH3  + O2 --> 3N2 + 6H2O

 

The better the inflow of the catalyst the higher the efficiency of the reaction. A good inflow means a homogenous velocity- and ammonia concentarion field in front of the catalyst. Typical values:

 

Ammonia concentration: +/- 10%

Velocity mean deviation: + / - 15%

 

To reach this tolerances the implementation of baffle plates, static mixers etc. are necessary. With cfd the implementation/adjustment is economiclal compared to building a prototype.

denitrification

The pictures below are showing the evaporation of ammonia and the Streamlines inside the duct.

 

 

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