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http://dx.doi.org/10.5322/JESI.2013.22.11.1481

Numerical Study on Optimization of the SCR Process Design in Horizontal HRSG for NOx Reduction  

Kim, Kyeongsook (Department of Biochemical Engineering, Dongyang Mirae University)
Lee, Kyeongok (Department of Cleaner Environment, Gyeonggi College of Science and Technology)
Publication Information
Journal of Environmental Science International / v.22, no.11, 2013 , pp. 1481-1498 More about this Journal
Abstract
The SCR (selective catalytic reduction) system is highly-effective technique for NOx reduction from exhaust gases. In this study, the effects of the direction and size of nozzle and the ammonia injection concentration on the performance of SCR system are analyzed by using the computational fluid dynamics method. When the nozzle is arranged in zigzaged direction which is normal to exhausted gas flow, it is shown that the uniformity of gas flow and the NH3/NO molar ratio is improved remarkably. With the change of the ammonia injection concentration from 0.2 vol%(wet) to 1.0 vol%(wet), the uniformity of gas flow shows a good results. As the size of nozzle diameter changes from 6 mm to 12 mm, the uniformity of gas flow is maintained well. It is shown that the uniformity of the $NH_3/NO$ molar ratio becomes better with decreasing the ammonia injection concentration and the size of nozzle diameter.
Keywords
SCR; DeNOx; HRSG; AIG; CFD;
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Times Cited By KSCI : 2  (Citation Analysis)
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