Numerical simulation of hydrodynamic properties of dense pneumatic conveying of pulverized coal in vertical pipe at high pressure

A k-Ε-kp-Ε p two fluid model was introduced to study three dimensional flow behaviors of dense phase pneumatic conveying of pulverized coal in vertical pipe on the basis of the kinetic theory of granular flow, taking into account the turbulent interaction between gas phase and particle phase. The results of influence of superficial velocity, transport pressure and particle diameter were reported. The results indicate that as the superficial velocity increases pressure gradient decreases first then increases; as the transport pressure decreases pressure gradient declines and an increase in particle size leads to increment in pressure gradient. The simulation results on pressure gradient were validated by the experimental data.