把国产５０ＭＷ燃贫煤锅炉的炉膛看作一个瑞克型燃烧室，分析了炉膛负压脉动的成因。根据脉动燃烧的研究成果，计算了炉膛烟气负压脉动的驱动力，并应用气力输运理论对送风机电压波动驱动炉膛负压脉动作了定量分析。图３参４ The domestic 50MW lean coal boiler hearth as a Rick-type combustion chamber, analyzed the cause of the hearth negative pressure pulsation. According to the pulsating combustion research results, the driving force of the negative pressure pulsation of furnace flue gas is calculated, and the negative pressure pulsation driven by the fluctuating pressure of the blower is analyzed quantitatively by the theory of pneumatic transport. Figure 3 Participation 4