18-09-2011
At the end of March 2011 the new DeNOx plant was put successful into operation at the German cement manufacturer Südbayer. Portland-Zementwerk (SPZ) in Rohrdorf.
The new selective catalytic reduction (SCR) system converts nitrogen oxides (NOx) and ammonium hydroxide from the kiln exhaust gas into atmospheric nitrogen and water, thus reducing emissions considerably to meet not only current but also future emission.
A catalytic reduction of the NOx output requires the operation temperature to be more than 250 °C. To achieve this, the kiln exhaust gas is heated up in heat exchangers supplied by Ecoflex, another member of the GEA Group.
The low dust DeNOx plant is the first of its kind in operation at a cement plant worldwide. Advantage of this arrangement after the dusting stage are lower operational cost and a longer lifetime of the catalyst.