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填料塔内气液两相通常为逆流流动。液体从上向下流动过程中,在填料表面上形成膜状流动。一般来说,适当的持液量对填料塔的操作稳定性和传质是有益的,但持液量过大,将减少填料层的空隙率和气相流通截面积,使压降增大,处理能力下降。为确定塔径,需要选定空塔气速;为确定动力消耗,需知道气体的压降。
Gas-liquid two-phase packing tower is usually countercurrent flow. Liquid flows from top to bottom and forms a film-like flow on the surface of the packing. In general, the appropriate liquid holding capacity of the tower for the operation of the stability and mass transfer is beneficial, but the holding liquid is too large, will reduce the porosity of the filler layer and gas flow cross-sectional area, the pressure drop increases, the treatment Decrease in ability. To determine the diameter of the tower, you need to select the superficial gas velocity; to determine the power consumption, you need to know the pressure drop of the gas.