Interaction of blended-coal combustion process:Influence of excess air coefficient on burnout characteristics
Ma Lun
Wang Tuwei
Fang Qingyan
Guo Anlong
Wang Tingxu
Tan Peng
Zhang Cheng
Chen Gang
Abstract：The experiment of the influence of excess air coefficient on the burnout characteristics are performed under four coals and their blended coals (0％ 、25％ 、50％ 、75％ 、100％) The resuhs show that the combustion of blended coal is impacted by two opposite effects:the promote function and the restrain function.Under the out-furnace coal blending method,the interaction of blended coal is obvious when low-volatile coal is blended with high-volatile coals (especially,under the blending ratio of 75％).Enhancing the excess air coefficient can weaken the restrain function.Under the in-furnace coal blending method,when low-volatile coal is blended with high-volatile coals,as increasing the excess air coefficient,the restrain function is also lower,and the combustion independence of individual coals gradually increases,and the burnout of blended coal approaches the linear value.
Keywords：blend-coal combustionexcess air coefficientburnout characteristicinteraction
Publication Date：2017-01-01