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运用欧拉双流体模型,针对循环流化床复合燃烧技术,建立了描述其炉内气固运动特性的三维数学模型,研究分析了CFB复合燃烧技术中不同气相进料位置及不同二次风速度对炉内气固运动特性的影响,结果表明不同的煤层气燃烧器布置位置对颗粒浓度有重要影响,不同二次风速下,煤层气燃烧器布置位置为距布风板2m时,流动状态较稳定,而且能够在悬浮段形成高浓度颗粒流,能使燃料在炉膛整个上升过程中都处于高温燃烧氛围中。
By using the Euler bi-fluid model, a three-dimensional mathematical model describing the gas-solid motion characteristics in a circulating fluidized bed combustor was established. The effects of different gas phase feed positions and different secondary air velocities On the gas-solid motion characteristics of the furnace. The results show that different CBM burner placement positions have an important effect on the particle concentration. Under different secondary air velocities, when the CBM burner layout position is 2m away from the air distribution plate, Stable, and can form a high concentration of particle flow in the suspension section, enabling the fuel in the furnace throughout the ascending process are in a high temperature combustion atmosphere.