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Numerical modeling of hydrodynamics of spouted bed in solid fuel boiler
https://doi.org/10.24223/1999-5555-2024-17-1-19-27
Abstract
The issues of numerical modeling of hydrodynamics of a spouted fuel bed in the furnace of a solid-fuel boiler are considered. At present, solid-fuel boilers are widely used in the power industry of the Russian Federation, with the share of coal-fired generation to remain significant in the projected terms. Therefore, the study of the efficiency of thermal and hydrodynamic processes that ensure the implementation of clean coal technologies is a relevant task both today and in the long term. The article presents the following main stages of numerical modelling of the hydrodynamics of the spouted bed: problem formulation with selection of boundary and initial conditions, methods of solving the Navier-Stokes and continuity equations for the air flow, Newton's equations and diffusion equations for particles. The k-omega turbulence model was used in the calculations that is described by means of two partial differential equations for the variables k (kinetic energy of turbulence) and omega (specific dissipation rate). A comparative analysis of environmental advantages and disadvantages of existing methods of combustion of low-grade coal in schemes with in-cycle gasification (ICG) is carried out. Advantages and difficulties of switching to structures with CFB in the spouted bed mode are shown. Numerical modeling of the cold spouted bed created by means of particle injection is performed, a set of initial settings and boundary conditions is presented, the adequacy of the obtained results is verified by hydrodynamic characteristics of the isothermal process. The obtained results allow us to proceed to the next stages with non-isothermal models, with heat exchange and combustion reactions in the spouted bed of coal taken into account. The following refinement of the physical model will allow to achieve more accurate and reliable results and to ensure their correct scaling.
About the Authors
K. D. Vuigova
Kazan State energy University
Russian Federation
Russian Federation
Krasnoselskaya str., 51, 420066, Kazan
M. G. Ziganshin
Kazan State energy University
Russian Federation
Russian Federation
Krasnoselskaya str., 51, 420066, Kazan
References
1. Coal gasification and its application in power engineering / V. S. Pryatkina, A. A. Belov, V. V. Ivanov, V. N. Baltyan, V. I. Chebotarev // Izvestiya vuzov. North-Caucasian region. Technical Sciences. Energy 2018; 3 (199): 42 – 47.
2. Filippova S. P., Keiko A. V. Coal gasification: at the crossroads. Technological factors / Thermal Engineering 2021; (3): 45 – 58.
3. Techno-economic analysis of oxy-fuel IGCC power plants using integrated intermittent chemical looping air separation. / Bin Shi; Wen Xu; Wei Wu; Po-Chih Kuo // Energy Conversion and Management 2019; (195): 290 – 301
4. Ivanova K. S., Strezhik A. A. Heat recovery boiler of Grodno CHP-2 with additional fuel combustion chamber // STK BNTU "Actual problems of energy" 2020; (76): 39 – 42.
5. Morev V. G. About fuel afterburning in exhaust gas heat utilizers / Industrial Energy 2018; (11): 33 – 44.
6. Experience of start-up and initial operation of unit №9 with CFB boiler at Novocherkasskaya CDES / G. A. Ryabov, O. M. Folomeev, E. V. Antonenko, I. V. Krutitsky // Proceedings of the IV Conference "Utilization of Solid Fuels for Effective and Environmentally Friendly Production of Electricity and Heat" 2018; 73 – 82.
7. Puzyrev E. M., Salomatov V. V. Prospects and possibility of industrial development of CFB fuel combustion technology // Polzunov Bulletin 2019; (1): 132 – 136.
8. Bondarev A. V. Conceptual bases of creation of automation systems for small capacity boilers with fluidized bed at construction and reconstruction of coal-fired boiler houses // Electronic scientific journal "Engineering Vestnik Don" 2018; №4 (51): 176.
9. Development of diesel thermal power plants with active boilers with high-temperature fluidized bed utilizers / A. V. Smirnov, A. V. Bondarev, S. V. Alexandrov, E. V. Bolbyshev // Engine Engineering 2018; (3): 19 – 23.
10. Bondarev A. V., Bolbyshev E. V., Smirnov A. V. Automation of small capacity coal-fired boilers with high-temperature fluidized bed furnaces and flue gas recirculation // Engine Engineering. 2018; (3): 24 – 28.
11. Puzyrev E. M., Golubev V. A., Puzyrev M. E. Prospects of application of boilers with circulating fluidized bed furnaces in municipal power engineering / Heat Supply News 2016; (10): 31 – 33.
12. Ziganshin M. G. Calculation of parameters of devices with spouting polydisperse material for fuel preparation systems of TPPs / Power engineering: research, equipment, technology 2013; (3 – 4): 39 – 47.
13. Bacelos M. S., Passos M. L. and Freire J. T. Characteristics of flow in wet conical spouted beds of unequal-sized spherical particles / Brazilian Journal of Chemical Engineering 2008; Vol. 25: 27 – 38.
14. Modelling of Spouted and Spout-Fluid Beds: Key for Their Successful Scale Up / Moliner C., Marchelli F., Bosio B. and Arato E. // Energies 2017; Vol.10: 1729.
15. Numerical Study on the Gas−Solid Flow in a Spouted Bed Installed with a Controllable Nozzle and a Swirling Flow Generator / Feng Wu, Xinxin Che, Zhenyu Huang, Haojie Duan, Xiaoxun Ma, and Wenjing Zhou // ACS Omega 2020; (5): 1014 – 1024.
16. Experimental Study on Gas−Solid Flow in the Spouted Bed under Longitudinal Vortex / Feng Wu, Xinxin Che, Haojie Duan, Lingyi Shang, Xiaoxun Ma, Gang Wang, and Zhiquan Hu // ACS Omega 2019; (4): 18880 – 18888.
Review
For citations:
Vuigova K.D., Ziganshin M.G. Numerical modeling of hydrodynamics of spouted bed in solid fuel boiler. Safety and Reliability of Power Industry. 2024;17(1):19-27. (In Russ.) https://doi.org/10.24223/1999-5555-2024-17-1-19-27
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