패키지형 소형 SCR 시스템 내 NH₃ 농도분포 제어를 위한 AIG의 배치에 관한 전산해석적 연구

다국어 초록 (Multilingual Abstract)

A package type of SCR (selective catalytic reduction) system that was proposed for removing the NOx found in flue gas from the small scale of air pollution sources was evaluated. The efficiency of the SCR system is determined by the proper utilization of catalytic media installed inside of the system, and the proper distribution of flow velocity and NH₃ concentration in the flue gas is a crucial factor for using the catalytic media. In this study, the distributions of NH₃ concentration were estimated under the various arrays and shapes of AIG at the given gas flow condition. The value of RMS (%) in NH₃ concentration is 95.3% at co-current flow (at 0°) injection but it is 90.1% at the condition of counter-current flow (at 120°) condition, which implies the counter-current injection is more favorable. By rearranging the NH₃ injection flow rates based on the distribution of velocity and NH₃ distribution in basic calculation, the value of RMS (%) in NH₃ concentration was reduced to 62.8%. The enhanced effect of NH₃ mixing by the combined effect of arrays and shapes are complied in the study.