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一、前言 粉煤燃烧是一个非常复杂的物理化学过程。当煤粉被喷入锅炉炉膛后,受到火焰的辐射加热和回流烟气的对流加热,温度急剧上升,加热速率非常快,可达10~5K/秒。在一个极短的时间内,在煤粉粒子与周围介质之间及粒子内部进行着一系列的热质交换和化学反应:煤粒析出挥发份;挥发份与周围氧化介质发生气相反应;其反应产物与剩余焦碳
First, the preface Pulverized coal combustion is a very complex physical and chemical processes. When pulverized coal is injected into the hearth of the boiler, it is radiated by the flame and heated by the convection of the flue gas. The temperature rises sharply and the heating rate is very fast, reaching 10 to 5 K / s. In a very short period of time, a series of heat and mass exchange and chemical reactions take place between the coal particles and the surrounding medium and inside the particles: the coal particles precipitate the volatile matters; the volatile matters react with the surrounding oxidation medium; and the reaction Product and coke remaining