B106 EFFECT OF COAL TYPE ON GASIFICATION IN PRESSURIZED DROP TUBE FURNACE(Droplet/particle combustion-1)

概要

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To understand the effect of coal type on coal gasification process at pressurized drop tube furnace, numerical study was conducted with PSI-cell method. Turbulence and turbulent gas phase combustion incorporate standard k-ε model and eddy dissipation model, respectively. Effect of coal type on carbon conversion at the same coal feed and gas flow rates can't be verified due to the variation of coal composition, so the same equivalence ratio condition is chosen. The volatile release based on experiments should be taken in computations for accurate carbon conversion, especially in coal gasification process due to the low gasification reaction. Even at over 1500K and 15 atmospheric pressures, where reactions are primarily diffusion-controlled, the carbon conversion varies with the coal type. The temperature gradient near burner region becomes flat with increasing proximate volatile and moisture contents, but the volatiles released can show the reverse trend by the fast gas phase reaction.
一般社団法人日本機械学会の論文
2000-10-01