A Pilot Plant Study of Coal Dryer: Simulation and Experiment

https://doi.org/10.22146/ajche.68745

Abdul Halim(1*), Afninda Aryuni Widyanti(2), Celvin Dicky Wahyudi(3), Fahimah Martak(4), Eka Luthfi Septiani(5)

(1) Department of Chemical Engineering, Universitas Internasional Semen Indonesia, Jawa Timur, Indonesia
(2) Department of Chemical Engineering, Universitas Internasional Semen Indonesia, Jawa Timur, Indonesia
(3) Department of Chemical Engineering, Universitas Internasional Semen Indonesia, Jawa Timur, Indonesia
(4) Department of Chemistry, Faculty of Science, Institut Teknologi Sepuluh Nopember, Jawa Timur, Indonesia
(5) Department of Chemical Engineering, Faculty of Engineering, Hiroshima University, Japan
(*) Corresponding Author

Abstract


High moisture content in low-range coal causes low calorific value.  To increase the quality, drying by a coal dryer to minimize moisture content is proposed.  Here, a case study of a cyclone-like conical tube coal dryer pilot plant was reported.  Drying heating uses combustion heat generated from volatile matter combustion.  This approach will solve the two problems simultaneously: decreasing moisture content and volatile matter.  The computational fluid dynamic (CFD) approach is used to study fluid dynamics inside the coal dryer using ANSYS Fluent 2020R2 software.  The CFD simulation results represent the phenomenon of coal drying inside the coal dryer validated by the pilot plant experimental result.  The simulation was carried out in steady and unsteady conditions to understand the drying phenomena.  The simulation firmly fits the experimental result, especially in an unsteady state system, indicating that the simulation result is promising for further coal dryer design.  The optimal condition produces a high moisture content reduction of 86.37%, uniform fluid distribution, and significant volatile matter combustion

Keywords


Coal Upgrading; Coal dryer; CFD Simulation; Case Study; Unsteady state

Full Text:

PDF


References

ANSYS Inc. (2020) ANSYS Fluent Theory Guide. ANSYS, Inc, Canonsburg

Arena U (2013) 17 - Fluidized bed gasification. In: Scala FBT-FBT for N-ZEC and G (ed) Woodhead Publishing Series in Energy. Woodhead Publishing, pp 765–812

Auamwong S, Srinophakun TR. (2020). “Mathematical Model for Agglomeration Process of Milk Powder.” ASEAN J. Chem. Eng., 20,154–164.

Baaqy L Al, Arias G, Rachimoellah M, Nenu RKT. (2013). “Pengeringan Low Rank Coal dengan Menggunakan Metode Pemanasan tanpa Kehadiran Oksigen.” J. Tek. Pomits, 2,228–233

Borah RC, Ghosh P, Rao PG. (2011). “A review on devolatilization of coal in fluidized bed.” Int. J. Energy Res., 35,929–963.

Canbek O, Erdoğan ST. (2020). “Influence of production parameters on calcium sulfoaluminate cements.” Constr. Build Mater., 239,117866.

ESDM. (2018). “Cadangan Batubara Indonesia Sebesar 26 Miliar Ton.” In: Kementeri. Energi dan Sumber Daya Miner. https://www.esdm.go.id/id/media-center/arsip-berita/cadangan-batubara-indonesia-sebesar-26-miliar-ton. Accessed 17 May 2021

Grimes RW, Cha CY, Sheesley DC. (1990). “Preparation for upgrading western subbituminous coal.” Laramie, Wyoming

Halim A, Kusumandari FA, Widiyastuti, et al. (2013). “The rule of carrier gas flow rate to Li+ diffusivity of LiFePO4 particles as lithium battery application.” In: 2013 International Conference on Renewable Energy and Sustainable Energy (ICRESE). pp 170–174

Halim A, Setyawan H, Machmudah S, et al. (2014). “Effect of fuel rate and annealing process of LiFePO4 cathode material for Li-ion batteries synthesized by flame spray pyrolysis method.” AIP Conf. Proc. 1586,173–178.

Hankalin V, Helanti V, Isaksson J (2011) “High efficiency power production by gasification”. In: Cossu R, He P, Kjeldsen P, et al. (eds) Sardinia 2011-Thirteenth International Waste Management and Landfill Symposium. CISA Publisher, Cagliari

Jovanovic R, Milewska A, Swiatkowski B, et al. (2011). “Numerical investigation of influence of homogeneous/ heterogeneous ignition/combustion mechanisms on ignition point position during pulverized coal combustion in oxygen enriched and recycled flue gases atmosphere.” Int. J. Heat Mass Transf., 54,921–931.

Kumar M D R, Anand R. (2019). “Chapter 5 - Production of biofuel from biomass downdraft gasification and its applications”. In: Azad AK, Rasul MBT-AB (eds) Woodhead Publishing Series in Energy. Woodhead Publishing, pp 129–151

Li H, Zhang S, Li Y, et al. (2017). “Numerical Simulation and Experimental Research on Drying Behavior of a Single Lignite Particle (SLP) under High-Temperature Flue Gas.” Energy and Fuels, 31,13329–13337.

Li X, Gao L, Yun D, et al. (2018). “A CFD modeling investigation for structure optimization of a rotary steam tube dryer.” IOP Conf. Ser. Mater. Sci. Eng., 397,12076.

Li ZK, Yan HL, Yan JC, et al. (2019). “Drying and depolymerization technologies of Zhaotong lignite: A review.” Fuel Process Technol., 186, 88–98.

Liu M, Xu C, Han X, et al. (2020). “Integration of evaporative dryers into lignite-fired power plants: A review.” Dry Technol. 38, 1996–2014.

Marshall EM, Bakker A. (2003). “Computational Fluid Mixing.” Handb. Ind. Mix. 257–343

Miller B. (2013). “3 - Fuel considerations and burner design for ultra-supercritical power plants.” In: Zhang DBT-U-SCPP (ed) Woodhead Publishing Series in Energy. Woodhead Publishing, pp 57–80

Ohm T-I, Chae J-S, Lim J-H, Moon S-H. (2012). “Evaluation of a hot oil immersion drying method for the upgrading of crushed low-rank coal.” J. Mech. Sci. Technol., 26,1299–1303.

Osman H, Jangam S V, Lease JD, Mujumdar AS. (2011). “Drying of Low-Rank Coal (LRC)—A Review of Recent Patents and Innovations.” Dry Technol., 29, 1763–1783.

Phiciato P, Yaskuri D. (2019). “Dual-Stage Drying Process of Lignite Using Pilot Scale Coal Rotary Dryer.” Int. J. Coal Prep. Util. 39, 373–388.

Rao Z, Zhao Y, Huang C, et al. (2015). “Recent developments in drying and dewatering for low rank coals.” Prog. Energy Combust. Sci., 46,1–11.

Salinero J, Gómez-Barea A, Fuentes-Cano D, Leckner B. (2018). “Measurement and theoretical prediction of char temperature oscillation during fluidized bed combustion.” Combust. Flame, 192, 190–204.

Si C, Wu J, Zhang Y, et al. (2019). “Experimental and numerical simulation of drying of lignite in a microwave-assisted fluidized bed.” Fuel, 242, 149–159.

Simanjuntak ME, Prabowo, Widodo WA, et al. (2019). “Experimental and numerical study of coal swirl fluidized bed drying on 100 angle of guide vane.” J. Mech. Sci. Technol., 33, 5499–5505.

Siripaiboon C, Sarabhorn P, Areeprasert C. (2020). “Two-dimensional CFD simulation and pilot-scale experimental verification of a downdraft gasifier: effect of reactor aspect ratios on temperature and syngas composition during gasification.” Int. J. Coal Sci. Technol., 7, 536–550.

Xu Y, Musser J, Li T, et al. (2018). “Numerical Simulation and Experimental Study of the Gas-Solid Flow Behavior Inside a Full-Loop Circulating Fluidized Bed: Evaluation of Different Drag Models.” Ind. Eng. Chem. Res., 57, 740–750.

Yadav S, Mondal SS. (2019). “A complete review based on various aspects of pulverized coal combustion.” Int. J. Energy Res., 43, 3134–3165.

Yang X, Chen G, Huang L, et al. (2021). “Experimental study on bituminous coal blending in a down-fired boiler with anthracite combustion system under low load.” Asia-Pacific J. Chem. Eng., e2676.

Zhang K, You C. (2013). “Numerical simulation of lignite drying in a packed moving bed dryer.” Fuel Process Technol. 110, 122–132.



DOI: https://doi.org/10.22146/ajche.68745

Article Metrics

Abstract views : 2792 | views : 1745

Refbacks

  • There are currently no refbacks.


ASEAN Journal of Chemical Engineering  (print ISSN 1655-4418; online ISSN 2655-5409) is published by Chemical Engineering Department, Faculty of Engineering, Universitas Gadjah Mada.