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首页> 外文期刊>Chemical engineering journal >Measurements of solid concentration and particle velocity distributions near the wall of a cyclone
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Measurements of solid concentration and particle velocity distributions near the wall of a cyclone

机译：旋风分离器壁附近的固体浓度和颗粒速度分布的测量

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The particle velocity and concentration distribution in the near-wall region of the cyclone were experimentally studied. A series of measurements were conducted with fiber optical probes (FOPs). It was found the radial solid concentration distribution is severe non-uniform and particles agglomerate as dense spiral bands near the wall, moving downwards with a certain interval. On the cross-section plane, from the center to the wall, solid concentration increases. The average solid concentration near the wall increases with the gas velocity or solid concentration at the cyclone inlet. Along the moving particle bands, solid concentration increases and particle average velocity decreases. Under present experimental conditions, the thickness of the particle bands in the cylindrical section is about 4-12 mm. Particle velocity in the near-wall region is in the range of 0.5-2.5 m/s and its average value is insensitive to the operational parameters. The number of spiral bands increases with the cyclone's inlet gas velocity, and might be greatly influenced by the cyclone structure.
机译：实验研究了旋风分离器近壁区域的粒子速度和浓度分布。使用光纤探头（FOP）进行了一系列测量。发现径向固体浓度分布严重不均匀，并且颗粒聚集成壁附近的密集螺旋带，以一定间隔向下移动。在横截面上，从中心到壁，固体浓度增加。壁附近的平均固体浓度随旋风分离器入口处的气体速度或固体浓度而增加。沿着运动的粒子带，固体浓度增加而粒子平均速度降低。在目前的实验条件下，圆柱形部分中的颗粒带的厚度约为4-12mm。近壁区域的粒子速度在0.5-2.5 m / s的范围内，其平均值对运行参数不敏感。螺旋带的数量随旋风分离器进气速度的增加而增加，并可能受到旋风分离器结构的极大影响。

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