| 摘要 |
<p>PURPOSE:To individually aerate a surface water layer and a deep water layer, by providing intermittent hydraulic water-lift cylinders at several stages along a vertical direction by every predetermined depth of water, aerating the water at every stage and concurrently forming a convection at every stage to increase an amount of dissolved oxygen. CONSTITUTION:When air in inner and outer cylinders 20, 21 are completely lifted up, pressurized air from air-supply hoses 16, 17 begins to stay in the inner and outer cylinders from their upper parts so that the floatation of the air becomes intermittent, but pumping-up is continued even when the air does not float. Air blocks are present at the upper part and the lower part of the cylindrical body 1, and the water sandwitched between the two water blocks is lifted up as a matter of course when they are lifted up. The water ascending through the cylindrical body 1 is circulated and fluidized as shown in the arrows 26, 28- 30, while the water ascending through the cylindrical body 4 is circulated and fluidized as shown in the arrows 27, 31-33. Consequently, the surface water layer part 34 and the deep water layer part 35 are individually affected by aerating action.</p> |
