Abstract: The effects of liquid properties on liquid entrainment in separation space above the bubbling zone in a new scrubbing-cooling chamber were investigated by isokinetic sampling method. The experimental results showed that at the same static liquid level, with the increased of gas velocity, the height of gas-liquid separation space decreased and the amount of liquid entrainment E increased. E generally changed little at the outlet, while it changed a little smaller near the wall, which was mainly influenced by gas circumfluence flow. E increased with the decrease of surface tension and decreased with the increase of viscosity. E increased 2.5 times when surface tension decreased from 72.8 to 25.8 mN/m, and increased 1 time when the viscosity increased from 1 to 2.3 mPa×s. Liquid properties had a significant impact on the amount of liquid entrainment. An empirical formula for E and physical parameters was also established, which provided theoretical basis for improving interior structure in scrubbing-cooling chamber.

Key words: scrubbing-cooling chamber, liquid entrainment, liquid property, operating variable

摘要： 采用等速取样法对床层气液鼓泡区上方分离空间的液滴夹带进行了实验测定，研究了液相性质对液滴夹带的影响. 结果表明，同一静态液位下，随气速增加，气液分离空间高度逐渐减小，液滴夹带量增大；出口处液滴夹带量E在径向上总体变化不大，贴近壁面处偏小，主要受气体出口处气体回流流动的影响；液滴夹带量随液相物质表面张力减小而增大，随液体粘度增大而增大，表面张力从72.8 mN/m减小到25.8 mN/m液滴夹带量增大2.5倍，液体粘度从1 mPa×s增加到2.3 mPa×s液滴夹带量增大1倍. 液体物性对液滴夹带量的影响较显著，由此建立了液滴夹带量与物性参数的经验关联式，为改善洗涤冷却室内部结构提供了理论依据.

关键词: 洗涤冷却室, 液滴夹带, 液相性质, 操作变量