非均匀布风对流化床密相床区燃烧温度的影响

Effects on Dense-Phase Zone Temperature of Fluidized Bed with Uneven Air Distribution

由于采用非均匀布风 ,内旋流流化床的移动区空气量不足 ,导致燃烧不充分 ,温度较低。当移动区未流化时 ,密相区内存在较明显的温度不均匀性。随着移动区流速的提高 ,温度差迅速减小。当移动区流速超过 2 .0 umf后 ,密相区温度基本均匀一致。流动区流速对密相区温度均匀有一定的影响 ,流速越高 。

Because of the uneven distribution of the fluidized air the air in the moving-bed zone of ICFB is lower than the needed amount of combustion,and the combustion in this zone is insufficient and the temperature is lower than that in the flowing-bed zone.The temperature in the dense-phase zone is uneven when the moving bed is not fluidized.The temperature difference in the moving-bed zone and flowing-bed zone is rapidly shortened with increasing the fluidized velocity in the moving-bed zone.The temperature in the dense-phase zone is invariable when the air velocity of the moving-bed zone is over 2.0 u mf,The velocity of moving-bed zone has some effects on combustion stability.the higher the velocity the more stable the combustion.