The solid holdup, in a 150 mm-ID × 2460 mm-height gas–liquid–solid expanded bed with air, water and glass beads (the diameter of particles is 0.6–0.8 mm) was firstly investigated based on the immersion-type online multiphase measuring instrument, and bubble behavior was studied via the BVW-2 double electrical conductivity probe. The effect of the superficial gas velocity and liquid velocity on the expanded ratio, the transition ratio, the bubble rising velocity, the gas holdup and the solid holdup was studied. It is discovered that compared with the gas velocity, the liquid velocity has stronger impact on the expanded ratio, but it is opposite for the transition ratio. The average gas holdup and solid holdup increase linearly as the superficial gas velocity goes up. Among it, the gas holdup increases greater in the center, while the solid holdup increases greater near the wall. Compared with it, when the superficial liquid velocity rises, the average gas holdup hardly changes, but the average solid holdup keeps decreasing, especially the solid holdup distributes flatter with the increase of the superficial liquid velocity.

固体滞留物在150 毫米内径 ×  2460 毫米高的气-液-固膨胀床中，装有空气，水和玻璃珠（颗粒直径为0.6-0.8 首先使用浸没式在线多相测量仪进行研究，然后通过BVW-2双电导率探针研究气泡行为。研究了表观气体速度和液体速度对膨胀比，过渡比，气泡上升速度，气体滞留率和固体滞留率的影响。研究发现，与气体速度相比，液体速度对膨胀比的影响更大，但对于过渡比却相反。随着表观气体速度的增加，平均气体滞留率和固体滞留率呈线性增加。其中，中心处的气体滞留量增加更大，而壁附近的固体滞留量增加更大。与之相比，当表观液体速度升高时，平均持气量几乎不变，