摘要
应用数值模拟的方法研究了多管式旋风分离器内的气相流场,研究发现,单管压降是组成多管旋风分离器压降的主要部分,约占90%。在灰斗内单管排尘口以下轴向速度逐渐减小,在排尘口以下200mm处轴向速度值几乎为0,气流不会夹带颗粒向上返混。在进气均匀的情况下,依然存在着窜流现象,窜流率约为10%。单管分离空间底部存在摆尾现象,排尘口下部区域内压力分布不均,是导致窜流现象发生的直接原因。
The flow field in the multi-tube seperator was studied by the method of numerical simulation. It was founded that about 90% of total pressure drop of the seperator was produced by the cyclone tube. The axial velocity of gas flow in the dust hopper decreased greatly after the gas was discharged from the cyclone tube, and there was nearly no axial gas flow at the distance of 200ram from the discharge port so resulted no particle reentrament. The back mixing of the gas flow in the dust hopper was founded even on the condition that the inlet of gas flow was distributed well. The ratio of back mixing flow to the inlet flow was about 10%. The unstable of the rotation flow in the lower part of the cyclone tube and the uneven distribution of gas pressure under the discharge port resulted the back mixing of gas flow in the dust hopper.
出处
《石油化工设备》
CAS
2011年第6期24-29,共6页
Petro-Chemical Equipment
