11 Possibly the most popular,economical,and effective means of controlling particulates is the cyclone. Fig.4-1 shows a simple schematic of a cyclone.
12 The dirty air is blasted into a conical cylinder away from the centerline.
13 This creates a violent swirl within the cone,and the heavy solids migrate to the wall of the cylinder by centrifugal action where they slow down due to friction and exit at the bottom of the cone.
14 The clean air is in the middle of the cylinder and exits out the top.
Cyclones are widely used as precleaners to remove large particles before further treatment.
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參考答案:11 控制颗粒最普及最经济最有效的设备可能就是旋风分离器。图4-1显示的是一个旋风分离器的简单示意图。
12 污染的气流被冲击成一个远离中线的锥状圆柱体。
13 这样就在圆锥体内产生了一个剧烈的漩涡，而杂质粗粒借助离心作用移至圆柱体的表面，由于表面的摩擦力而速度减缓并从圆锥体的底部退出。
14 纯净的气流在圆柱体的中间，从顶部退出。旋风分离器作为空气粗滤器被广泛用于去除大颗粒以便进一步处理。
