石炭の反応器モデリング(<特集>反応モデリング-石炭・重質油・バイオマス-)

概要

論文の詳細を見る
This paper presents outline of modeling of coal reactor such as coal combustor and gasifier. Transport phenomena such as thermo fluid flow, heat and mass transfer with chemical reactions can be predicted by numerical simulation. The information obtained by numerical simulation is meaningful if modeling is valid. Therefore, modeling procedure is one of the most important factors in numerical simulation. Modeling of gas phase and dispersed (pulverized coal particle) phase are presented, those are usually used in so-called Euler-Lagrange approach. In gas phase, equations of thermal fluid flow, heat and mass transfer are discretised by Finite Volume Method, FVM. In dispersed phase, equations of the definition of velocity, momentum, mass, energy are solved to obtain positions, velocity components, mass, and temperature of pulverized coal particle in each time step. The effect of dispersed phase on gas phased is evaluated by Particle Source In Cell, PSI-Cell model. Thermal radiation heat transfer in medium with absorption gas, soot, and pulverized coal particle is also discussed. Introducing some achievements of above modeling shows how to apply the above modeling to the coal combustor and gasifier. The possibility and capacity of modeling predicting complicated transport phenomena in coal reactor is also indicated.
2011-02-20