| 摘要 |
PROBLEM TO BE SOLVED: To provide an air lift device capable of preventing separation of air from water caused by expansion of air bubbles in the middle of a lifting pipe and of improving lifting capability. SOLUTION: In this air lift device, an air supply device 6 is provided in the lifting pipe 1 having a liquid suction port 2 in the lower part and a liquid discharge port 3 in the upper part. In the middle of the lifting pipe 1, communication holes 5 communicated with water W which is liquid outside the pipe 1 are provided. COPYRIGHT: (C)2008,JPO&INPIT
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