CFD Simulation of Air Flow in CFBC Boiler under Different Geometry of Nozzle Grid
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2017, Vol 5, Issue 5
Abstract
CFBC technology is more preferable now a day because of its low pollution and flexibility in use of fuel characteristics. The air is a prime requirement for any combustion process to be happen and in case of CFBC air is required to create high turbulence in combustion zone to get better mixing of air and coal particles to get more heat generation and complete combustion of coal particles. The air which creates fluidization of coal passes through array of nozzle. Here in present study, by considering three different geometry of nozzles three different arrays of nozzles have been created by using Pro E 5.0 software. The air distribution in combustion zone have been obtained by making CFD simulation of those arrays. Maximum magnitude of velocity upto 29.1 m/s, 71 m/s and 74.2 m/s have been obtained in simulation for mushroom type nozzle grid, arrow head type nozzle grid and pig tail type nozzle grid respectively. The value, 71 m/s is the nearer to 59 m/s which is the practical value obtained in CFBC thermal power plant. We can conclude that maximum velocity can be obtain in case of pig tail type nozzle grid while the area of maximum velocity can be seen in the case of arrow head type nozzle grid.
Authors and Affiliations
Vedant D. Vyas, Dr. D. B. Jani
Keywords
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