煤挥发分，以符号Vdaf（过去用Vr）表示。煤中有机质的可挥发的热分解产物。其中除含有氮、氢、甲烷、一氧化碳、二氧化碳和硫化氢等气体外，还有一些复杂的有机化合物。
测试结果表明，影响后燃现象的主要因素是给煤的粒度分布、煤挥发分含量及挥发分析出规律，同时与炉膛内总风量、一二次风量的配比有关。
The test shows that size distribution of feeding coal, volatile content and its release as well as the total air rate and primary air ratio will influence the post combustion in CFB boiler.
水平浓淡燃烧技术在一些电站锅炉上的应用，很好地解决了低挥发分煤的着火、稳燃和燃尽的问题。
The application of horizontal dense-dilute technology in some boilers has resolved many problems, such as the fire, self-supporting burning and burn-up problem of low volatile coal.
采用热天平在不同的升温速率下对18种煤的最终挥发分产量的变化规律进行了研究。
The varying law of the final volatile yield of 18 different coal types was studied at different heating rates by thermobalance.
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