Effect of air injection method on the performance of an air lift pump

摘要

Air lift pump performance was investigated experimentally for different submergence ratios (the ratio between the immersed length of the and its total length) using different air injection footpiece designs. For this purpose an air lift pump with a riser 200 cm long and 2.54 cm in diameter, was designed and tested. Nine different air injection footpiece designs were used at four sbu- mergence ratios with different air injection pressures (from 0.2 to 0.4 bar). An area of 10 mm~2 was chosen and divided into nine injection hole arrangements (1, 2, 3, 4, 6, 15, 25, 34 and 48 holes) to cover the whole experimental range.