Computational Design of a Cyclone Furnace for Concentrated Slop Combustion: A Potential Method of Converting Waste to Energy in the Alcohol Industry
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In alcohol industries, a by-product called slop is considered as waste and usually results in costly waste management. A method of slop utilization as fuel was proposed. Slop contains a high ash composition so that combustion in a cyclone furnace would be suitable. Firstly, this study examined the combustion temperature of concentrated slop in a cyclone furnace. The experimental and computational results were compared to determine the appropriate amount of supplied air for concentrated slop combustion. The finding demonstrated that experimental and computational results were in same thermal trend. The appropriate amount of air provided for concentrated slop combustion was 100–120% theoretical air. In addition, the physical dimension of cyclone furnace affected to cyclone motion and combustion was investigated. The simulations were set up to determine the optimal diameter to length ratio (D/L) and the minimum diameter of chamber for the concentrated slop combustion. The results showed that the optimal D/L was in a range from 1:1.4 to 1:2.0 and the diameter must be more than 120 cm because such dimensions resulted in a higher average temperature and good cyclone motion in the chamber. The cyclone motion resulted in ash separation onto the furnace wall and it could be melted into liquid slag ensuring a decrease in fly ash particles. In conclusion, it is believed that combustion of concentrated slop, which is the by-product of the alcohol industry, can be an efficient method of converting waste to energy thus leading to a zero waste factory.
KeywordsCyclone furnace Concentrated slop Waste to energy Computational fluid dynamics
The authors gratefully thank the Thai Beverage Energy Co., Ltd. for research sponsorship and concentrated slop. Appreciation is also due to the Center for Alternative Energy Research and Development, Mechanical Engineering Department, Faculty of Engineering, Khon Kaen University for assistant and technical supports.
- 2.Gholamreza, A., Davood, T., Ahmadreza, A., Omid, A.A.: Evaluation of synchronous execution of full repowering and solar assisting in a 200 MW steam power plant, a case study. Appl. Therm. Eng. 112, 111–123 (2017). https://doi.org/10.1016/j.applthermaleng.2016.10.083 CrossRefGoogle Scholar
- 10.Jenkins, R.W., Ellis, E.H., Lewis, E.J., Paterson, M., Le, C.D., Ting, V.P., Chuck, C.J.: Production of biodiesel from Vietnamese waste coffee beans: biofuel yield, saturation and stability are all elevated compared with conventional coffee biodiesel. Waste Biomass Valoriz. 8, 1237–1245 (2016). https://doi.org/10.1007/s12649-016-9715-x CrossRefGoogle Scholar
- 29.Hatami, M., Ganji, D.D., Gorji-Bandpy, M.: Experimental and thermodynamical analyses of the diesel exhaust vortex generator heat exchanger for optimizing its operating condition. Appl. Therm. Eng. 75, 580–591 (2015). https://doi.org/10.1016/j.applthermaleng.2014.09.058 CrossRefGoogle Scholar
- 30.Thai Public Broadcasting Service (Thai PBS): Alcohol consumption in Thailand. http://englishnews.thaipbs.or.th/infographic/alcohol-consumption-thailand/ (2014). Accessed 25 Feb 2018
- 37.Eugene, L.K.: Applied Combustion, 2nd edn. CRC Press, Taylor & Francis Group Publishes, Boca Raton (2007)Google Scholar
- 45.Carpenter, K., Schmidt, C.: Common boiler excess air trends and strategies to optimize efficiency. In: ACEEE Summer Study on Energy Efficiency in Buildings. https://www.civilica.com/EnPaper--ETEC03_184.html (2008). Accessed 25 Feb 2018
- 46.Shaha, A.K.: Combustion Engineering and Fuel Technology. Oxford & IBH Publishing Company, New Delhi (1997)Google Scholar
- 49.Combustion and Fules: Atomization of liquid fuels. http://fluid.wme.pwr.wroc.pl/~spalanie/dydaktyka/combustion_MiBM/BCS/LIQUID_FLUIDS_ATOMIZATION.PDF (2016). Accessed 25 Feb 2018
- 50.Chong, C.T., Hall, H.: Combustion Characteristics of Alternative Liquid Fuels. University of Cambridge, Cambridge (2011)Google Scholar
- 61.Ansys fluent theory guide version 15.0. Canonsburg (2014)Google Scholar
- 62.CleaverBrooks: Excess air and boiler efficiency. http://www.cleaverbrooks.com/reference-center/boiler-basics/index.aspx (2017) Accessed 25 Feb 2018