持液量是指正在操作的填料容器中液体体积占容器体积的分率。
3.25 持液量(liquid holdup) 填料塔操作时在填料空隙中及填料表面上所积存的液体总量。 表3.23-1 乱堆填料(random packing)：以乱堆的方式进行装填。
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As the special structure and principle, SBD can operate at very high vacuum condition and large number of plates. Moreover, it also has the properties of low holdup and low pressure drop in column.
由于其特殊的结构和工作原理,可在高真空度下操作并具有很高的理论塔板数,同时具有持液量低,压降小等特点。
参考来源 - 旋转带蒸馏CFD模拟和塔中液体流动观察·2,447,543篇论文数据，部分数据来源于NoteExpress
采用降膜理论建立了板波纹填料的持液量模型。
A new method was presented according to the theory of falling film to calculate the holdup in structured packing.
对脉冲流区后的动持液量提出了单独的经验关联。
A special correlation of dynamic liquid hold-up after the pulse flow regime is carried out empirically.
首次提出填料塔动持液量不是均匀分布的，高径比是影响动持液量的一个重要参数。
The authors put forward at first that operating holdup in packed column is not well-distributed and ratio of height to diameter is an important parameter which influences operating holdup.
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