抄録
We investigated the characteristics of an air-lift pump system for conveying coarse particles consisting of different sizes and densities. Based on a momentum equation, we proposed a method to correlate discharged flow rates of both particles and water with a supplied air flow rate. To confirm the validity of the proposed correlation, experiments were carried out with an air-lift pump system, whose upriser was a pipe of 40 mmID and 7.86m long. The experimental conditions were as follows: The submergence ratio was 0.8; two sorts of ceramic spheres were used at a time chosen from three whose diameter and density were (6.0mm 2540kg/m3), (9.9mm, 2540kg/m3) and (9.6mm, 3630kg/mm3); the mass flow rate of the mixed particles was set constant at 0.10, 0.20 or 0.30kg/s, respectively. The experimental data is presented, and comparisons between the data and the calculations are made in this report.
