탈황효율 개선을 위한 가스부유식 흡수탑 설계
Design of gas suspension absorber to improve desulfurization efficiency
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초록
본 연구에서는 배기가스가 흡수탑으로 균일하게 유입될 수 있도록 가스 부유식 흡수탑의 입구덕트와 안내깃을 다시 설계하여 탈황효율을 높이고자 한다. 산업용 보일러에서 대기오염 물질의주 발생원인 중에서 황산화물의 오염물질을 저감하기 위해 기존의 장치를 다시 설계하여 해결하고자 한다. 이를 위하여 가스 부유식 흡수탑 내부에서 배기가스 중에 SOx 성분의 제거효율을 높일 수 있도록 배기가스, 슬러리와 재순환 흡착제가 균일하게 접촉하도록 변경한다. 그리고 보일러출구에서부터 가스 부유식 흡수탑 출구까지 압력손실에 대한 초기 설계값과 CFD 값을 비교하여검증한다. 또한 배기가스의 속도분포, 재순환 흡착제 농도분포, 액상 슬러리 거동, 압력손실을 각각 비교하였다. 그 결과는 보일러 출구에서부터 흡수탑 출구까지 압력손실이 감소하고, 배기가스의 편향이 최소화되므로 인해 탈황 효율이 개선되었음을 확인하였다.
Abstract
In this study, the inlet duct and guide vane of the gas floating absorption tower were redesigned to improve the desulfurization efficiency so that the exhaust gas can be uniformly introduced into the absorption tower. In order to reduce the sulfur oxide pollutants among the main sources of air pollutants in industrial boilers, the existing equipment is redesigned and solved. For this purpose, change the exhaust gas, the slurry and recycling the adsorbent to improve the removal efficiency of SOx component in the exhaust gas inside the gas floating absorption tower so as to uniformly contact. And the initial design value and CFD value for the pressure loss from the boiler outlet to the gas floating absorption tower outlet are verified. Also, the velocity distribution of the exhaust gas, the concentration distribution of the recycled adsorbent, the liquid slurry behavior, and the pressure loss were compared. The results confirmed that the desulfurization efficiency was improved because the pressure loss from the boiler outlet to the absorption tower outlet was reduced and the deflection of the exhaust gas was minimized.
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