| 摘要 |
PURPOSE: A water circulating apparatus using a draft tube in water supply and a circulating method using the same are provided to reduce the rising speed of water in the draft tube by supplying air in the shape of microbubble into the lower underwater part of the water supply. CONSTITUTION: A water circulating apparatus includes a cylindrical draft tube, a rotatable impeller, a first motor, a microbubble generator(100), an air supplying pipe, and a controlling part. The inner part of the draft tube is hollow. The upper part and the lower part of the draft tube are opened. The draft tube is installed in the underwater of the water supply. The impeller is attached to a main shaft which is matched to the central shaft of the draft tube. The impeller is arranged under the surface of water in the water supply and radially diffuses water from the central shaft. The first motor is positioned at upper surface of the water and drives the main shaft in order to rotate the impeller. The microbubble generator is arranged at the lower part of the draft tube. The air supplying pipe supplies air to the microbubble generator. |
