Particle and Aerosol Research Vol. 8, No. 3, September 2012 |
ISSN : 1738-8716 (Print) ISSN : 2287-8130 (Online) |
Computational Study on the Soot Blowing Method for Enhancing the Performance of the SCR System
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Abstracts
In the SCR (selective catalytic reduction) system which is used for controlling the NOx emission from the Diesel
engines, the soot deposited on the catalysis causes degradation of the system performance. Numerical study was done
to evaluate the performance of soot blower which is proposed as a method for removing the soot on the catalysis. The
spray conditions and the effect of the compressed air from the AIG (air inlet gun) were analyzed numerically to
evaluate the overall effective method of the soot blowing. The characteristics of the final velocity distribution and
velocity waves across the inlet section of the catalysis were evaluated with respect to the geometries of the AIG
outlets and pressure conditions. An experimental model was used to validate the results of the numerical calculation
that is used for finding the effective removal blowing momentum transfer quantities of soot the inlet section of the
catalysis, and it is proposed that the required minimum blowing momentum transfer quantities are over than 0.499 khgh/m.teff. in the current study.
Keywords£ºSoot blower, SCR(selective catalytic reduction), CFD(computational fluid dynamics), Catalyst regeneration,
Turbulence
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