Combustion processes produce nitrogen oxides (NO_x), which are contained in the flue gases and lead to considerable pollution of the environment. In flue gas denitrification, a distinction is made between primary and secondary measures.

As relevant primary measures, we reduce the formation of NO_x in the furnace. These include the way the flue gas is circulated, the air staging and the fuel staging.

Secondary measures reduce the NO_x formed in the combustion process. A distinction is made between the SNCR process (Selective Non Catalytic Reduction) and the SCR process (selective catalytic reduction).

We see the SNCR process as the usually better secondary measure for flue gas denitrification. They benefit from significantly lower costs and smaller space requirements compared to the SCR process (approx. 1/10 of the costs of the SCR process).

Our services

• Preparation and analysis of your process data
• Model-based analysis of your firing system on the basis of the process data
• Comprehensive plant optimisation with focus on primary and secondary measures for flue gas denitrification
• Combination of control-engineering optimisation and process-engineering conversions to work out the technologically and economically best concept for you
• Analysis and optimisation of existing SNCR plants with regard to uniform distribution of the reducing agent in the flue gas stream, position of the nozzle lances, selection of nozzles, optimisation of the firing rate control for the reduction of ammonia water/urea solution