Analysis of Pressure and Velocity in Coal Combustion System Using Dpm Method in Fluent Software

In this paper computational analysis of pressure and velocity in coal combustion system using the fluent software is analysed. The combustion of coal is used in circulating fluidized bed combustion system. This work is concerned about gas–solid two-phase mixtures flowing upwards through the fast beds. The type of information resulting from various ways of analyzing the pressure variations and the effect of superficial velocity on pressure in fluidized beds are discussed. This paper presents the standard k–є model and two-phase turbulence model was used to describe the gas–solids flow in a CFB. The analysis of velocity and pressure in coal combustion is done by discrete phase model (DPM) and non pre mixed combustion in species model. The flow velocity and pressure variation in the system were modeled by solving the continuity and momentum equations of the gas flow by using the CFD. The fluidizing velocity has taken (4.5-6) m/s and the effects of operating parameters on pressure, such as gas velocities are discussed. As a result of analysis, the variation in superficial velocity, does affect the pressure in different mean fractions in the combustion zone of the combustor. The results show that if the fluidizing velocity increases then the total and dynamic pressure also increases.