【摘要】 利用所建立的裤衩腿循环流化床动态数学模型,对"翻床"过程的原因及主要影响因素进行了分析.结果表明:选用对压力变化相对稳定的罗茨风机并保证其工作在稳定工况区以及在合理范围内降低床料压降占炉膛总压降的比例,均有利于控制"翻床"现象的发生;两侧较大的温度偏差也有可能导致两床发生失稳,运行时应尽量保持炉膛两侧床温一致.更多还原

【Abstract】 Causes and main influencing factors of the "bed turning" process were analyzed by the built up dynamic mathematic model for the circulating fluidized bed(CFB) with breeches-legs.Results show that selecting Root’s fan with little sensitivity to pressure variation and keeping the fan operating in stable condition,as well as deceasing the ratio of bed pressure drop to total pressure drop in the furnace are in favour of avoiding the "bed turning" phenomenon.Large temperature difference between the two sides of furnace may result in "bed turning", so the bed temperatures of the two sides should be kept consistent during operation.更多还原