Abstract
Purpose of the study is to obtain fundamental knowledge about Kuznetsk bituminous coal entrained-flow gasification in O2-CO2 mixtures for oxy-fuel IGCC. To achieve this purpose, it is necessary to carry out experimental and numerical studies. To obtain universal knowledge, “CKTI” single-stage gasifier with fuel consumption of 5-15 kg/h was chosen as an experimental installation. In order to identify the most interesting and informative experimental regimes, a number of computational studies have been carried out, whose results are given in the paper. A numerical (CFD) model has been developed, which includes all the submodels necessary for the study. Two series of numerical calculations were carried out. In the first series, the composition of the blast (O2 = 0-100%, CO2 = 0-100%) and the oxygen ratio were varied at constant consumption of coal and blast. In the second series, the composition of the blast (O2 = 0-100%, CO2 = 0-100%) and the coal consumption were varied at constant oxygen ratio and blast flow rate. The study allowed predicting and analyzing the temperature distribution and the syngas components content along the gasifier height with different CO2 concentrations in the blast.
Highlights
The technology of integrated gasification combined cycle (IGCC) allows to use cheapest and most common fuel - coal for production of electrical energy with efficiency of more than 50% [1]
A number of research teams involved in the development of the Japanese oxy-fuel IGCC [2] conducted experimental studies and calculations [3, 4] on the adaptation of a two-stage air-blown entrained-flow gasifier such as Mitsubishi Heavy Industries (MHI) to operate on O2-CO2 mixture
The composition of the blast (O2 = 0-100%, CO2 = 0-100%) and the coal consumption were varied with constant oxygen ratio and blast flow rate
Summary
The technology of integrated gasification combined cycle (IGCC) allows to use cheapest and most common fuel - coal for production of electrical energy with efficiency of more than 50% [1]. Purpose of the study is to obtain fundamental knowledge about Kuznetsk bituminous coal entrained-flow gasification in O2-CO2 mixtures for oxy-fuel IGCC.
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