배기후처리장치를 이용한 오염물질 저감에 관한 연구

Abstract

As industry grows, atmospheric pollution becomes serious by emission from combustion facilities such as generating plants and various industrial furnaces. In order to solve these problems, many researchers have made efforts to reduce the pollution with new technologies and various methods such as reburning, oxygen enrichment, pulsating combustion and after-burning technology at industrial field. For these reasons, we have studied and developed a venturi type after-treatment system to reduce the emission more efficiently by minimizing combustion area. We have also studied emission reduction characteristic of model gas turbine and furnace using catalyst as a after-treatment system It is main objective to reduce the emission with the addition of venturi type after-treatment system. Although emissions decreases for most experimental conditions, emissions increases for some experimental conditions. In this experiment, it is found that oxygen flow rate of 8l/min for area ratio of 0.27 and 0.55 is adequate considering pollutants reduction with oxygen consumption and flame stability. In the case of model gas turbine, the excess air ratio has large influence on the reduction of HC and CO, at the range of air ratio α=0.93～1.14. The reduction effects of Pt/Rh catalyst for NOX are more notable without regard to the excess air ratio. In the case of Pt and Pd catalyst, excess air ratio has an influence on the reduction of NOX and the reduction effect is more notable at α=1.26. In the case of model furnace, NOx conversion increases as cell number increases for Pd catalyst. It shows 100% conversion ratio at cell number of 200 and 300 for pt catalyst. Also, Pt catalyst are better than Pd catalyst at α=1.5 on these conditions. In addition, CO and HC concentrations decreases at α=1.5 with Pd catalyst.