SIMULATION ANALYSIS ON SOâ‚‚ REDUCTION INSIDE A SEAWATER SCRUBBER
DOI:
https://doi.org/10.11113/jt.v81.13719Keywords:
Scrubber, spray dryer, nozzle angle, Ansys Fluent©, SO₂ reductionAbstract
The marine industry is one of the industrial sectors that release sulphur dioxide (SO2) into the atmosphere as a result of heavy fuel oil’s combustion as an energy source. Generally, flue gas desulphurization method has been used to control the SO2 emission where seawater used as the alkaline slurry. However, usually the gas velocity at the scrubber’s wall is moderately high that could contribute to the uneven distribution of liquid droplets over the entire domain surface, and consequently can affect the amount of SO2 reduction released. Hence, the purpose of this study is to observe the gas flow pattern in the scrubber and to determine the effect of a spray nozzle angle on the SO2 reduction released. The scrubber with 4.46 m in the height, 1.35 m in the diameter and spray nozzle angle between 80-120ᵒ was designed using Ansys Fluent© version 17.2. Three factors which are gas velocity, pressure, and temperature of gas were studied to achieve the optimum SO2 reduction. The simulation result shows the declination trend in these three factors on the gas distribution as the angle of the spray nozzle is increased. The percentage of SO2 reduction is increased up to 17 % for the spray nozzle angle between 80-120ᵒ.
References
Anders, A., Stefan, M. 2007. Use of Seawater Scrubbing for SO2 Removal from Marine Engine Exhaust Gas. Energy & Fuels. 21: 3274-3279.
DOI: https://doi.org/10.1021/ef700359w.
Caiazzo, G.; Di, N.A., Langella, G. and Scala, F. 2012. Seawater Scrubbing Desulphurization: A Model for SO2 Absorption in Fall-down Droplets. Environmental Progress & Sustainable Energy. 31: 277-287.
DOI: https://doi.org/10.1002/ep.10541.
Caiazzo, G., Di, N. A., Langella, G., and Scala, F. 2009. Numerical Evaluation of Sea Water Scrubber’s Efficiency for Exhaust Gas Desulphurization. Italian Section of the Combustion Institute, 32nd Meeting on Combustion 2009, Rome, Italy, 26-28 April.
Caiazzo, G., Miccio, F., and Scala, F. 2013. Modelling Heat and Mass Transfer in a Seawater Scrubber for Marine Application: Some Improvements Based on a CFD Simulation. XXXVI Meeting of the Italian Section of the Combustion Institute, Italy, 2013.
Chris, W. 2015. Behemoths of Emission: How a Container Ship Can Out-pollute 50 Million Cars. Available online: http://www.enfos.com/blog/behemoths-of-emission-how-a-container-ship-can-out-pollute-50-million-cars/ 2015, (24 November 2017).
Claudio, A., and Carletti, G. 2015. New Aspects in Limestone Dissolution for Wet Flue Gas Desulphurization. PhD Thesis. Abo Academy University, Finland.
Giuseppe, C., Gluseppe, L., Francesco, M., and Fabrizio, S. 2012. An Experiment Investigation on Seawater SO2 Scrubbing for Marine Application. Environmental Progress & Sustainable Energy. 32: 4.
DOI: https://doi.org/10.1002/ep.11723.
Jabatan Laut Malaysia. 2011. Implementation of the International Convention for the Prevention of Pollution from Ships 1973 as Amended (MARPOL ANNEX VI Regulations for the Prevention of Air Pollution from Ships). Jabatan Laut Malaysia 2011.
Larson A. 2018. Supreme Court Strikes Down EPA’s MATS Rule. Power. 2018: 2.
DOI: http://www.powermag.com/supreme-court-strikes-down-epas-mats-rule/?printmode=0.
University of Vaasa. 2018. New Scrubber Does Not Pollute Sea Water. ScienceDaily. 2018. http://www.sciencedaily.com/releases/2016/02/160223074743.html.
Everson, R. C., Arif, A., and Neomagus, H. W. J. P. 2014. CFD Modelling and Simulations of an Industrial Wet Flue Gas Desulphurization Unit. 6th International Freiberg Conference on IGCC & XtL Technologies, Coal Conversion and Syngas. Dresden/Radabeul, Germany, 2014, 19-22 May.
Lamas, M. I., Rodriguez, C. G., Rodriguez, J. D., and Telmo, J. 2016. Numerical Model of SO2 Scrubbing with Seawater Applied to Marine Engine. Polish Maritime Research. 2(90): 42-47.
DOI: https://doi.org/10.1515/pomr-2016-0019.
Brown, F. Li, K. J., Kalata, W., and Schick, R. J. 2013. Analysis and Optimization of spray Tower in WFGD. ILASS Americas, 25th Annual Conference on Liquid Atomization and Spray Systems, Pittsburgh, PA, May, 2013.
Ansys, Inc. 2013. Ansys fluent in Ansys Workbench User’s Guide. Ansys, Inc.
A User’s Guide to Spray Nozzles, TeeJet Technology, Spray System Co.
Wärtsilä, Scrubber Product Guide, November 2014.
Kumaresh, S., and Man; Y. K. 2015. Numerical investigation of the flow Characteristics inside the scrubber unit. World Academy of Science, Engineering and Technology. International Journal of Mechanical Aerospace, Industrial, Mechatronic and Manufacturing Engineering. 9(2): 224-228.
Giuseppe, C., Gluseppe, L., Francesco, M., and Fabrizio, S. 2011. Seawater Scrubbing Desulfurization: A Model for SO2 Absorption in Fall-down Droplets. Environmental Progress & Sustainable Energy AICHE. 31(2): 277-287.
DOI: https://doi.org/10.1002/ep.10541.
Andreasen, A., and Mayer, S. 2007. Use of Seawater Scrubbing for SO2 Removal from Marine Engine Exhaust Gas. Energy & Fuels. 21: 3274-3279.
Chen, W. H. 2001. Unsteady Absorption of Sulfur Dioxide by an Atmospheric Water Droplet with Internal Circulation, Atmospheric Environment. 35: 2375-2393.
DOI: https://doi.org/10.1016/S1352-2310(00)00536-7.
Elperin, T., and Fominykh, A. 2005. Conjugate Mass Transfer during Gas Absorption by Falling Liquid Droplet with Internal Circulation. Atmospheric Environment. 39: 4575-4582.
DOI: https://doi.org/10.1016/j.atmosenv.2005.04.005.
Argyropoulos, C. D., and Markatos, N. C. 2015. Recent Advances on the Numerical Modelling of Turbulent Flows. Applied Mathematical Modelling. 39(2): 693-732.
Downloads
Published
Issue
Section
License
Copyright of articles that appear in Jurnal Teknologi belongs exclusively to Penerbit Universiti Teknologi Malaysia (Penerbit UTM Press). This copyright covers the rights to reproduce the article, including reprints, electronic reproductions, or any other reproductions of similar nature.
