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在一座0.3 Mw热输入的粉煤流化床燃烧试验台上，研究了其悬浮燃烧区内的气、固可燃物成分的分布特性。文中以烟气中的CO浓度(％)、煤灰的碳含量C(％)的分布来描述此特性。研究内容包括二次风率、二次风投入位置、床温、氧浓度、流化速度对悬浮燃烧区内CO浓度、煤灰碳含量C(％)分布影响规律。“,”On a pulverized-coal fluidized bed experimental rig with 0.3 MW heat input, the distribution characteristics of CO (%) (CO concentration in the gas) and C (%) (C content in the coal ash) in PC-FB＇s free combustion zone (FCZ) are studied. The influence of many factors on the distribution of CO (%) and C (%) in FCZ are investigated, such as bed temperature, fluidizing velocity, secondary air ratio, O2 concentration and secondary air ratio of each layer.