| 摘要 |
<p>1. Process and device for mixing and circulating gases and liquids particularly for the aeration of activated sludge in aeration tanks of treatment plants, where a conveying element, arranged below the surface of the liquid the surface of the liquid, produces a circulating flow of liquid, rotating between the surface and said liquid and the bottom of said tank in the form of a torus and where the said conveying element generates vortex tubes initiating from adventitious positions at the surface of said liquid, andthereby entraining gas downardly into said flow of liquid in form of bubbles, characterized by vortex tubes and thereby the vortex-bubbles tubes are generated freely extending from an area at the liquid surface in form of a ring up to the surface of said conveying element.</p> |
