습식 배연탈황공정에서 DBA 부산물의 영향

이형근; 조항대; 김인원; Hyung-Keun Lee; Hang-Dae Cho; In-Won Kim

HWAHAK KONGHAK, Vol.39, No.6, 763-769, December, 2001

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습식 배연탈황공정에서 DBA 부산물의 영향

Performance Test of Byproduct DBA Additives in Wet Flue Gas Desulfurization

이형근 ^†, 조항대 , 김인원 ¹

한국에너지기술연구원 에너지환경연구부, 대전 305-343
¹건국대학교 화학공학과, 대전 305-343

Hyung-Keun Lee^†, Hang-Dae Cho , and In-Won Kim¹

Energy and Environmental Research Department, Korea Institute of Energy Research, Daejeon 305-343, Korea
¹Department of Chemical Engineering, Konkuk University, Seoul 143-701, Korea

E-mail:

초록

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

[References]

Mobley JD, Chang CS, JAPCA, 31, 1249 (1981)
Chang CS, Rochelle GT, AIChE J., 28(2), 261 (1982)
Rochelle GT, "Process Synthesis and Innovation in Flue Gas Desulfurization," EPRI-FP-463-SR (1977)
Chang CS, Rochelle GT, AIChE Symp. Ser., 202, 78 (1981)
Chan PK, Rochelle GT, ACS Symp. Ser., 188, 75 (1982)
Kim EH, Lee JC, Lee HK, Kim IW, HWAHAK KONGHAK, 36(5), 827 (1998)
Electric Utility Engineer FGD Manual, Volume I, U.S. DOE, I.9-1 (1996)
Lee HK, Yoon HS, Cho HD, Park YS, Choi BM, HWAHAK KONGHAK, 38(5), 760 (2000)
Stevens GE, Horton WM, Hargrove OW, Owens DR, "Proceedings of the 1993 SO₂ Symposium," Boston, U.S.A., 203 (1993)
Burbank DA, Wang SC, Mckinsey RP, Williams JE, "Proceedings of the Symposium on Flue Gas Desulfurization," Houston, U.S.A., 233 (1980)

[Related Articles]

[1] Mobley JD, Chang CS, JAPCA, 31, 1249 (1981)

[2] Chang CS, Rochelle GT, AIChE J., 28(2), 261 (1982)

[3] Rochelle GT, "Process Synthesis and Innovation in Flue Gas Desulfurization," EPRI-FP-463-SR (1977)

[4] Chang CS, Rochelle GT, AIChE Symp. Ser., 202, 78 (1981)

[5] Chan PK, Rochelle GT, ACS Symp. Ser., 188, 75 (1982)

[6] Kim EH, Lee JC, Lee HK, Kim IW, HWAHAK KONGHAK, 36(5), 827 (1998)

[7] Electric Utility Engineer FGD Manual, Volume I, U.S. DOE, I.9-1 (1996)

[8] Lee HK, Yoon HS, Cho HD, Park YS, Choi BM, HWAHAK KONGHAK, 38(5), 760 (2000)

[9] Stevens GE, Horton WM, Hargrove OW, Owens DR, "Proceedings of the 1993 SO₂ Symposium," Boston, U.S.A., 203 (1993)

[10] Burbank DA, Wang SC, Mckinsey RP, Williams JE, "Proceedings of the Symposium on Flue Gas Desulfurization," Houston, U.S.A., 233 (1980)