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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