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

Abstract

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.