Abstract

Recently, there has been much research on the effect of ultrafine dust on human body with increasing interest in the ultrafine dust. In the Republic of Korea, there are many old thermal power plants, and the amount of ultrafine dust emitted from the thermal power plants is reported to be about 14% of the total amount of domestic fine dust. Therefore, the amount of fine dust from the flue gas desulfurization facility in the thermal power plant needs be reduced. In this study, we made an experimental setup to simulate a flue gas desulfurization facility and analyzed the physical characteristics of the particles passing through a mist eliminator. Experiments were carried out to investigate the collection efficiency of the mist eliminator by using the Arizona Test Dust in a dry environment, and then spraying limestone slurry into the flue gas desulfurization system equipped with the mist eliminator to examine the size and morphology of limestone particles upstream and downstream of the mist eliminator. Cut-off size of the mist eliminator was formed at about $6{\mu}m$. The result of this study is expected to be helpful for designing an electrostatic precipitator for removing particles passing through the mist eliminator.

Keywords

• Mist eliminator;
• Collection efficiency;
• Flue gas desulfurization

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Acknowledgement

Supported by : 한국에너지기술평가원(KETEP)

References

1. 이동규, 성재훈 (2018). 노후 석탄화력발전소 가동중단에 따른 미세먼지 농도 감소효과 분석, 한국환경경제학회 경제학 공동학술대회논문집, 2018(0). 65-78.
2. Atia, S., and Lee, C.I. (2003). Optimization of the length of the mist-eliminator blades for small size water powered scrubber, Geosystem Engineering, 6, 27-32. https://doi.org/10.1080/12269328.2003.10541201
3. Brauer, M, Hoek, G., Smit, H.A., de Jongste, J.C., Gerritsen, J., Postma, D.S., Kerkhof, M., and Brunekreef, B. (2007). Air pollution and the development of asthma, allergy and infections in a birth cohort, European Respiratory Journal, 29, 879-888. https://doi.org/10.1183/09031936.00083406
4. Brook, R.D., Brook, J.R., and Rajagopalan, S. (2003). Air pollution: The "heart" of the problem, Current Hypertension Reports, 5, 32-39. https://doi.org/10.1007/s11906-003-0008-y
5. Cardu, M., and Baica, M. (1999). Regarding a global methodology to estimate the energy-ecologic efficiency of thermopower plants, Energy Conversion and Management, 40, 71-87. https://doi.org/10.1016/S0196-8904(98)00038-7
6. Chung, J.W., Lee, Y.H., Lee, H.D., Park, J.H., Jun, G.I., and Cho, M.H. (2003). Characteristics of fly ashes emitted from large scale industrial process, Journal of Korea Society of Waste Management, 20, 179-185.
7. El-Dessouky, H.T., Alatiqi, I.M., Ettouney, H.M., and Al-Deffeeri, N.S. (2000). Performance of wire mesh mist eliminator. Chemical Engineering and Processing, 39, 129-139. https://doi.org/10.1016/S0255-2701(99)00033-1
8. Fletcher, R.A., and Bright, D.S. (2000). Shaper factors of ISO 12103-A3 (Medium Test Dust), Filtration and Separation, 37, 49-56.
9. Galletti, C., Brunazzi, E., and Tognotti, L. (2008). A numerical model for gas flow and droplet motion in wave-plate mist eliminators with drainage channels, Chemical Engineering Science, 63, 5639-5652. https://doi.org/10.1016/j.ces.2008.08.013
10. Gharib, J., and Moraveji, M.K. (2012). Determination the factors affecting the vane-plate demisters efficiency using CFD modeling, Journal of Chemical Engineering and Process Technology S1:003. doi:10.4172/2157-7048.S1-003. https://doi.org/10.4172/2157-7048.S1-003
11. Gutierrez Ortiz, F.J., Vidal, F., Ollero, P., Salvador, L, and Cortes, V. (2006). Pilot-plant technical assessment of wet flue gas desulfurization using limestone, Industrial and Engineering Chemistry Research, 45, 1466-1477. https://doi.org/10.1021/ie051316o
12. He, Q.C., Lioy, P.J., Wilson, W.E., and Chapman, R.S. (1993). Effects of air pollution on children's pulmonary function in urban and suburban areas of Wuhan, People's Republic of China, Archives of Environmental Health: An international Journal, 48, 382-391. https://doi.org/10.1080/00039896.1993.10545959
13. James, P.W., Wang, Y., Azzopardi, B.J., and Hughes, J.P. (2003). The role of drainage channels in the performance of wave-plate mist eliminators, Chemical Engineering Research and Design, 81, 639-648. https://doi.org/10.1205/026387603322150499
14. Kavousi, F., Behjat, Y., and Shahhosseini, S. (2013). Optimal design of drainage channel geometry parameters in vane demister liquid-gas separators, Chemical Engineering Research and Design, 91, 1212-1222. https://doi.org/10.1016/j.cherd.2013.01.012
15. Lei, Y.C., Chan, C.C., Wang, P.Y., Lee, C.T., and Cheng, T.J. (2004). Effects of Asian dust event particles on inflammation markers in peripheral blood and bronchoalveolar lavage in pulmonary hypertensive rats, Environmental Research, 95, 71-76. https://doi.org/10.1016/S0013-9351(03)00136-1
16. Nygaard, H.G., Kiil, S., Johnsson, J.E., Jensen, J.N., Hansen, J., Fogh, F., and Dam-Johansen, K. (2004). Full-scale measurements of $SO_2$ gas phase concentrations and slurry compositions in a wet flue gas desulphurisation spray absorber, Fuel, 83, 1151-1164. https://doi.org/10.1016/j.fuel.2003.12.007
17. Peters, T.M. (2006). Use of the aerodynamic particle sizer to measure ambient $PM_{10-2.5}$: The coarse fraction of $PM_{10}$, Journal of the Air and Waste Management Association, 56, 411-416. https://doi.org/10.1080/10473289.2006.10464522
18. Spengler, J.D., Brauer, M., and Koutrakis, P. (1990). Acid air and health, Environmental Science and Technology, 24, 946-956. https://doi.org/10.1021/es00077a002
19. Staehle, R.C., Triscori, R.J., Kumar, K.S., Ross, G., and Cothron, R. (2003). Wet electrostatic precipitators for high efficiency control of fine particulates and sulfuric acid mist, Institute of Clean Air Companies (ICAC) Forum 2003.
20. Xu, Y., Yang, Z., and Zhang, J. (2017). Study on performance of wave-plate mist eliminator with porous foam layer as enhanced structure. Part II: Experiments, Chemical Engineering Science, 171, 662-671. https://doi.org/10.1016/j.ces.2017.05.030