Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Study on Numerical Analysis of Shape and Guidevane Design for Improving a 500 PS SCR Reactor's Flow Uniformity

500 PS SCR 반응기의 유동균일도 향상을 위한 형상 및 가이드베인 설계에 대한 수치해석적 연구

  • Seong, Hongseok (Graduate School of Mechanical Engineering, Gyeongsang National University) ;
  • Lee, Chungho (Graduate School of Mechanical Engineering, Gyeongsang National University) ;
  • Suh, Jeongse (School of Mechanical Engineering, Gyeongsang National University. and ERI)
  • 성홍석 (경상대학교 기계항공공학부 대학원) ;
  • 이충호 (경상대학교 기계항공공학부 대학원) ;
  • 서정세 (경상대학교 기계공학부&ERI)
  • Received : 2015.05.05
  • Accepted : 2015.11.26
  • Published : 2016.01.10
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Abstract

With the assumption that the performance of a catalyst is guaranteed and that the performance of an SCR reactor is influenced by the uniformity of fluid flow into the catalyst, this study carried out a numerical analysis of flow uniformity, which is an important design factor in SCR reactors. CFD was used to grasp flow uniformity and flow characteristics inside the SCR reactor. As for the flow uniformity, analysis was carried out on the velocity and direction of the fluid flowing into the front of the first SCR reactor. Numerical analysis was carried out in terms of the area ratios of the mixing evaporator to the catalyst for 500 PS SCR, 1 : 1.9, 1 : 3.1, 1 : 4.5, and 1 : 7.0. The results showed that the larger the area ratio, the smaller the flow uniformity. On the basis of these results, the flow uniformity of the modified SCR reactor is 77%. A guidevane was installed to improve flow uniformity, and attempts were made to grasp the flow uniformity based on the shape of the guide vane. The shape of the guide vane was cylindrical, and numerical analysis was carried out for cases with two cylinders and three cylinders. As a result of the numerical analysis, it was found that while there was no great difference between 82.7% with two cylinders and 81.7% with three cylinders, the effects of the installation of the guide vane on the improvement of flow uniformity were indisputable.

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References

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