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Study of SNCR Application to Industrial Boiler for NOx Control  

Shin, Mi-Soo (Chungnam National University)
Kim, Hey-Suk (Chungnam National University)
Jang, Dong-Soon (Chungnam National University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.27, no.3, 2005 , pp. 286-292 More about this Journal
Abstract
This study is to investigate the industrial boiler which can be significantly affected by the restriction of NOx. Note that the application of SNCR method to industrial boiler is usually blown as not feasible due to the insufficient residence time for proper mixing. The purpose of this study is to investigate the applicability of the SNCR system application to the industrial boiler, which produces 40 tons of steam per hour using heavy oil. For the industrial boiler with 3-D rectangular coordinate, the general coding are made fur various turbulence modeling such as turbulent flow, turbulent fuel combustion, thermal NO formation and destruction together with the NO reaction with reducing agents. Further, the incorporation of drop trajectory model is successfully made in 3-D rectangular coordinate with Lagrangian frame and the main swirl burner effect on the characteristics of flame is considered. As expected a short flame was created and thereby NOx is removed more efficiently by increasing the proper region of temperature for NO reduction reaction. The validation of program was made successfully by the comparison of experimental data. Based on the reliable calculation results, the SNCR method in a industrial boiler shows the possibility as one of viable NO reduction method by the use of well designed mixing air of reducing agent.
Keywords
SNCR; Industrial Bolier; SIMPLEC; ${\kappa}-{\varepsilon}$ Model; Tertiary Mixing Air;
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