Hydrodynamics and Mixing analysis of different bed materials with coal in an industrial scale bubbling fluidized bed boiler
Advancements in computational methods are driving the growth of Computational Fluid Dynamics (CFD) simulations for industrial fluidized bed boilers. Errors in 2D simulations arise from limited data, inadequate representation of complex multiphase physics, and scale-up challenges in lab setups. A thr...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-05-01
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| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X25002497 |
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| Summary: | Advancements in computational methods are driving the growth of Computational Fluid Dynamics (CFD) simulations for industrial fluidized bed boilers. Errors in 2D simulations arise from limited data, inadequate representation of complex multiphase physics, and scale-up challenges in lab setups. A three-dimensional simulation of an industrial-scale Circulating Fluidized Bed (CFB) Boiler is necessary to capture all physical and chemical phenomena. The novelty of current research is to perform CFD simulations of hydrodynamics and heat transfer analysis inside industrial scale CFB boiler (bubbling regime). Five different bed materials (sand, coal ash, limestone, crushed alumina, olivine) along with coal particles are utilized in the present research. Eulerian-Eulerian multifluid model with kinetic theory granular flow is employed to solve multiphase physics. The computational outcomes are validated with real-time industrial data. The validated model is extended for detailed analysis of solid and air volume fractions, temperature and slip velocity variations along the height and width of boiler. Mixing analysis of bed materials with coal particles is carried out using standard deviation-based mixing factor. Coal ash is recommended for lower pressure drop and reduced erosion of boiler walls. Limestone offers better mixing with coal particles, while crushed alumina and olivine ensure uniform temperature distribution in boiler. |
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| ISSN: | 2214-157X |