气体搅动对填料塔和喷洒塔的性能影响

气体搅动作用可以强化液-液两相接触和传质性能.在填料塔和喷洒塔中,气体搅动对萃取塔性能的影响有很大的差异.在气体搅动下,通过对填料塔和喷洒塔流体力学性能和传质性能的试验研究,发现填料对气泡和液滴均有破碎作用,因此填料塔的气含率和分散相滞存率均明显高于喷洒塔,传质单元高度和液泛速度则相反;对填料塔和喷洒塔,气体搅动都可以显著提高液-液两相的接触与传质性能.

Effects of Gas-agitation on Packed and Spray Columns

Gas-agitation will improve the liquid-liquid contact and mass transfer in extraction column, and it has different effects on packed and spray columns. Performance experiment of hydrodynamics and mass transfer has been carried out both in packed and spray columns. It is clear that packing helps to break up the gas bubble and the liquid droplet of dispersed phase, so the gas hold-up and liquid hold-up in packed column are far larger than in spray column. But the unit height for mass transfer and flooding velocity behaves the other way round. The gas-agitation can greatly improve the liquid-liquid contact and mass transfer both in packed and spray columns.