탈질 시스템의 성능 예측에서의 유입 배기가스의 형태 영향에 대한 CFD 해석

Abstract

In the present study, the effect of the flow pattern of the inlet flue gas were investigated onthe denutrification performance through the numerical simulation. As the examples of theoff-design conditions, the skewed and double parabolic flow were chosen to compare theuniform flow used as the design condition. The SCR type of DeNOx facilities of thelarge-scaled coal-fired power plant currently in operation were adopted as the applicationmodel. In order to to deduce three performance variables, the steady two-dimensionalturbulent flow were solved using the thermal-flow software named as ANSYS-Fluent. Comparing the off-design conditions to the design condition, the computational resultsshowed that the predicted performances differed by 15.6% for the flow uniformity, 127%for NH /NO molar ratio of the mixed gas and 10.2% for the pressure loss of the wholeprocess.