TIIE GASIFICATION OF PULVERIZED COAL IN TIIE FLUIDIZED-BED BY STEAM Zhang Xianyao and Zhang Hong ABSTRACT The effect of changing the fluidized-bed temperature,fluidizing ve- locity and the bed height on performance is discussed in detail in this paper.Measured performance characteristics include gas rate,steam conversion,volumetric gasification intensity and gas quality. The distribution of contents of gas and the distribution of tempe- rature along the height of fluidized-bed are achieved under different ope- rating conditions, 15‘ 一 水工 一 ， ， ， 一