噴流床石炭ガス化炉内における溶融スラグ飛散現象の発生条件(流体工学,流体機械)

概要

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Experimental studies using 2t/d and 200t/d coal gasifier were carried out to investigate the inception criteria for entrainment of molten slag droplet in an entrained flow coal gasifier. It was clarified that average gas dynamic pressure P_d and liquid film Reynolds number Re_f influenced strongly the phenomenon of entrainment of molten slag. The formula of the critical gas dynamic pressure P_<dc> and the critical Weber number We_c=1.73, which could be applied to the large-scale gasifier, were obtained as inception criteria for the phenomenon. It was clearly shown that the flow pattern in the large-scale gasifier could be different from the smaller gasifier by means of numerical simulation analysis and that the critical velocity U_<gc> decreases relatively along with the scaling-up of the gasifier.
2009-08-25