Numerical study of operating modes of single-stage air-steam blown entrained flow gasifier

The gasification of solid fuels makes it possible to increase the technical and environment efficiency of the solid fuels using in the power engineering. Large-capacity gasifiers mostly operate on the principle of entrained flow: pulverized-coal fuel is entrained by blowing and undergoes the stages of conversion into combustible gases in the reactor. The paper studies the one-step process of air-steam coal gasification with preliminary heating of the gasification agent. To this end, a mathematical model is used, including one-dimensional transport equations and chemical transformations of fuel and gas mixture. The calculations provide the main characteristics of the gasification process and their dependence on the control parameters: the air heating temperature, the excess of the oxidant and the steam consumption.