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Issue
HWAHAK KONGHAK,
Vol.39, No.6, 763-769, 2001
습식 배연탈황공정에서 DBA 부산물의 영향
Performance Test of Byproduct DBA Additives in Wet Flue Gas Desulfurization
이형근, 조항대, 김인원
국내 산업체에 설치된 배연탈황공정의 효율적이고 안정적인 운전을 위하여 첨가제의 물리화학적 특성, 첨가제의 반응 메커니즘 등을 살펴보고 bench 규모의 실험장치를 이용하여 국내 산업체에서 부산물로 발생한 첨가제의 성능을 측정하기 위한 실험을 수행하였다. 실험 조건하에서 DBA 첨가제 주입농도가 증가함에 따라 SO2 제거효율의 증가를 보였으며, L/G Ratio가 8.0이상인 조건에서 DBA 농도가 1,200 ppm인 경우에는 pH 또는 SO2 농도에 관계없이 SO2 제거효율은 99.8% 이상을 보였다. 또한 첨가제를 사용할 경우에 pH가 낮은 영역에서 사용하는 것이 높은 영역에서 사용하는 것보다 그 효과가 상승되었으며, 액상 내에서 완충작용을 하게 되어 액체막 저항을 감소시키는 효과를 보였다. 실험결과에서 pH, L/G, DBA농도를 이용하여 SO2 제거효율을 예측하기 위한 경험적 모델식을 제시하였다.
To enhance the performance of the flue gas desulfurization process using Dibasic Acids(DBA) additive, physico chemical properties and reaction mechanism were studies and the performance of the DBA additive, produced from a domestic industrial company as byproduct, was experimentally investigated using a bench scale system. The increase of SO2 removal efficiency was observed as the increasing of DBA concentration in the experimental conditions. SO2 removal efficiency at DBA concentration of 1,200 ppm and L/G ratio of 8.6 was showed more than 99.8% regardless of pH and inlet SO2 concentration. SO2 removal efficiency was higher in the lower pH region than the higher region, and liquid film resistance was decreased due to the buffering effect of additive in the solution. Empirical equations were obtained to predict the SO2 removal efficiency depend on pH, L/G ratio and concentration of DBA additive using the experimental data.
Keywords: Desulfurization; DBA; Additive; Absorption
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