Abstract
The multi-phase particle in cell (MP-PIC) method through defining the concept of ‘parcel of particles’ has been applied to study the simulation of gas-solid fluidized bed. In this paper, in order to reveal the pyrolysis behaviors with low-rank pulverized coal, the three-dimensional gas-solids flow, heat transfer and chemical reaction in a pilot-scale descending pyrolysis furnace was simulated by adopting the MP-PIC method coupled with a distributed activation energy model (DAEM) reaction model. First, the MP-PIC method was validated by comparing the experimental data and simulation results of the furnace temperature at four different pyrolysis reaction regions in a vertical square descending pyrolysis furnace with the throughput of 1.2 t/h, respectively. Then this MP-PIC method was further extended for analyzing the effects of handling capacity with the throughput of 1.2, 1.5, 2.0, 2.5, 3.0 t/h.
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