| 摘要 |
<p>PURPOSE:To offer a deep aeration tank having a simple structure regardless of its great height, capable of uniformly supplying air to the whole region in the tank and excellent in efficiency in supplying oxygen to sewage. CONSTITUTION:This deep aeration tank consists of an outer cylinder 1 and an inner cylinder 2 concentrically erected on the bottom 1a of the outer cylinder 1 and having an inlet opening 2a at its upper part. The opening 2a of the inner cylinder 2 is positioned below the outflow part of the outlet of the outer cylinder 2. The fluid in the inner cylinder 1 is sucked by a lower circulator 10 from the bottom or its vicinity and mixed with a large amt. of air, and the mixture is injected between the outer cylinder 1 and the inner cylinder 2. The fluid in the tank is sucked by an upper circulator 20 from the upper part of the outer cylinder 1 and mixed with a large amt. of air, and the mixture is injected between the outer cylinder 1 and inner cylinder 2 at the intermediate height.</p> |
