The IUP Journal of Mechanical Engineering
2D Numerical Simulation of Coal Fired Circulating Fluidized Bed Combustion (CFBC) Boiler
Article Details
| Pub. Date | : May, 2020 |
|---|---|
| Product Name | : The IUP Journal of Mechanical Engineering |
| Product Type | : Article |
| Product Code | : IJME100520 |
| Author Name | : Anubhav P Jundre, P A Deshmukh |
| Availability | : YES |
| Subject/Domain | : Engineering |
| Download Format | : PDF Format |
| No. of Pages | : 11 |
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Abstract
Nowadays, fluidized bed is a well-known clean technology. It is used for many applications in thermal and chemical industries such as combustion and incineration, boiler, carbonization and gasification, calcination and refineries. Coal is an old and widely used fuel in thermal power plants for generation of electricity. To reduce pollution and uniform temperature distribution across furnace, fluidized bed combustion is very effective. Physically, multiphase fluidization and coal combustion are very complex to understand analytically and experimentally. In this paper, different parameters like solid volume fraction, pressure drop and temperature distribution are analyzed with the help of Computational Fluid Dynamics (CFD) technique. The governing equation and different approaches used for multiphase fluidization and coal combustion are analyzed. The main objective of this study is to analyze fluidization behavior across Circulating Fluidized Bed Combustion (CFBC) boiler where 2D industrial scale boiler geometry is used.
Description
Since 1980, Circulating Fluidized Bed Combustion (CFBC) is utilized and developed rapidly in the combustion field. It is composed of bed material (ash, sand and sorbent) which is fluidized with help of primary air at the velocity sufficient to expand the bed. At low velocity, very low bed material will be entrained from bed which is called bubbling fluidized bed. As the fluidizing velocity is increased, smaller particles will be recirculated in the bed, which is called circulating fluidized bed. After pressure drop across bed reaches a threshold value, then fuel (coal, coke, biomass) is supplied for combustion. This technology has many advantages compared to conventional boiler such as:
Keywords
Computational Fluid Dynamics (CFD), Circulating Fluidized Bed Combustion (CFBC), Hydrodynamic, Multiphase fluidization
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