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Optimization of SNCR Technology via CFD Simulation

Blejchař T., Malý R., Maier M., Čech B., Stáňa M., Szeliga Z.

Archivum Combustionis

2010

Vol. 30 nr 3

103-113

The paper deals with numerical simulation of the SNCR method. The CFD code Ansys/CFX was used for numerical modelling. The SNCR method was described by dominant chemical reaction, which was found in the NIST Chemical Database. The reactions including the reduction of NOx and the change of concentrations of pollutants, like N2O and CO in flue gas, were found there as well as. The proposed chemical kinetics and the CFD model were applied in two boilers. Both simulations were compared with experimental measurements. The first simulation was used to validate the chemical mechanism. The second simulation was based on the first simulation and it was used to verify the compiled SNCR chemical mechanism. The next one was a new variant of the reagent penetration lance and it was proposed and compared with the original variants.