3-D NUMERICAL SIMULATION OF TWO-PHASE FLOW DURING SEPARATION PROCESS OF COAL POWDER IN MILL INERTIAL SEPARATOR

Abstract

This paper presents the results of CFD simulation of multiphase flow within inertial separator in ventilation mill N. 400.42 of „TENT B2“ thermal power plant. Obtained results impersonate the influence of lower flaps positions within the separator on fineness of coal powder grinding on the exit of mill separator. According to the real size model, 3D geometry with high rate of resemblance has been made. Taking in consideration number of cells, convergence time period and accuracy of the obtained solutions, appropriate numerical grid has been performed and used in simulations. Standard k-ε model for solving the gas phase turbulent model is used. Modeling of monodisperse coal particles flow within the gas phase is performed by use of integrated Lagrangian DPM (Discrete Phase Model) method. The measurements obtained on real time scale model are used in purpose of setting the boundary conditions in case of horizontal position of the lower regulation flaps - S13. Afterwards, simulations with setting the flaps in 3 new/different positions have been performed. Results show the influence of the lower regulation flaps positions on the coal powder distribution and residual of coal particles on particular sieves on the outflow surface of inertial separator. The trends of inflection of these parameters can be c