| 摘要 |
A vertical funnel (1) channels a stream of liquid which rises towards the surface of a tank by virtue of the injection of a gas at the bottom of the funnel. Ribs (3) introduce turbulence. The funnel (1) is convergent and the liquid is at its highest velocity at the neck. The stream meets a stop plate (2) situated at a distance above the neck which is about twice the diameter of the neck. The impact breaks up the bubbles. The concave plate deflects the flow downwards. Convergents (4, 5) improve the flow. The device can be employed especially for aerating pools of water, wood pulp treatment tanks or for biological purification tanks. <IMAGE>
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