Numerical Simulation of Thermochemical Conversion of a High-Ash Coal in a Low-Temperature Fluidized Bed under Pressure
V. P. Patskov
Scientific–Technological Center of Coal Power Technologies, National Academy of Sciences and the Ministry of Fuel and Energy of Ukraine, Kiev 04070, Ukraine; CETC@i.kiev.ua
Pages: 134-142
Abstract
The paper considers a mathematical model, an algorithm, and a program for calculating nonstationary processes of air gasification of a high-ash coal under pressure in a pilot-scale circulating fluidized bed gasifier reactor. The effect of operation parameters on the course of the process is analyzed. It is shown that "hot spots" (short-duration local heatings) can form at various points of the bed, at which maximum temperature can be close or even exceed the fluid slagging point. Possible mechanisms of formation of "hot spots" are analyzed.
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