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1 前言煤的主要成分为固定碳(或残碳)、发挥物,水分、硫和灰分.当它处在高温氧化环境中时,首先热分解生成挥发物,挥发物和氧在煤粒周围的气相进行燃烧.热分解后的剩余物为固定碳和灰分,是固相物质,基本上在挥发物燃烧后和周围环境中的氧进行燃烧反应.因此,一般说来煤的燃烧分成两个阶段:挥发物燃烧阶段和固定碳燃烧阶段(见图1),对挥发物含量极少的无烟煤,只有后一个阶段.
1 INTRODUCTION The major component of coal is fixed carbon (or residual carbon) that exerts its effects on matter, moisture, sulfur and ash. When it is exposed to high temperature oxidation, the coal is first thermally decomposed to form volatiles, volatiles and oxygen around the coal particles Gas phase combustion after the thermal decomposition of the remainder of the fixed carbon and ash, is a solid material, basically in the volatile combustion and the ambient oxygen combustion reaction.Therefore, in general, the combustion of coal is divided into two stages : Volatile combustion stage and fixed carbon combustion stage (see Figure 1), anthracite for very little volatile content, only the latter stage.