| 摘要 |
PROBLEM TO BE SOLVED: To provide an air lift pump pipe allowing the pipe diameter of a liquid suction pipe and a lifting pipe to be smaller than the conventional one, having little adhesion and deposition of sludge or not requiring an adjusting device such as an adjusting measure. SOLUTION: In this air lift pump pipe 1, the lifting pipe 3 having a liquid drain port 5 at the upper part, and an air supply pipe 4 having an opening part 8 at the upper part, are connected in approximately U-shape directly or through connecting members 6a, 6b, 6c. The liquid suction pipe 2 having a liquid suction port 10 at the upper end is formed at a bottom part 12 of approximately U-shape, branching off to rise directly or through the connecting members 6a, 6b, 6c. Furthermore, the height position of the liquid suction port 10 of the liquid suction pipe 2 is formed in a position lower than the height position of the liquid drain port 5 of the lifting pipe 3. COPYRIGHT: (C)2003,JPO
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