holdup[英]['h?uld?p][美]['hold,?p]持液量
1.In terms of the scales and using available data by different authors, new improved correlations for evaluation of two phase pressure drop and phase holdups are proposed for porous and non-porous packings with equivalent diameters of 1.基于对滴流床中气液两相流动特征尺度的分析 ,提出以修正的相摩擦系数对相Reynolds数进行关联 ,获取低、高压滴流床中压降和持液量计算的统一关联式的方法 。
2.This paper reports measurements of the dispersedphase holdup,axial mixing and drop size in waterkerosene system in a 0.０３１ｍ的往复振动板式萃取塔内研究了此塔的分散相持液量、轴向混合和液滴大小。
3.The paper expounds the effect factor of holdup on batch distillation operation.本文阐述了持液量对间歇精馏操作过程的影响因素，得出了Ｃ—Ｏ２型网波填料塔间歇精馏过程持液量与空塔汽速的定量关系，为塔的优化操作提供了理论指导。
3)liquid hold-up持液量
1.The effects of liquid hold-up in the intermediate tank,temperature of liquid hold-up in the intermediate tank,flux of extractive solvent on the separation of azeotrope of ethyl acetate-ethanol by batch extractive distillation with N,N-dimethylformamide(DMF) as extractive solvent were investigated.使用一个带有中间贮罐的间歇萃取精馏实验装置,以能形成最低共沸物的乙酸乙酯-乙醇体系为分离对象,选用N,N-二甲基甲酰胺(DMF)为萃取剂,实验研究了中间贮罐持液量、中间贮罐持液温度、萃取剂加入速率等操作参数对分离过程的影响。
4)total liquid inventory总持液量
1.Study on variation rule of stabilized equilibrium time and total liquid inventory in transient flow process in sub-sea multiphase pipeline;海底混输管道瞬态过程中稳定平衡时间和总持液量变化规律研究
5)dynamic liquid holdup动持液量
1.The theoretical analyses of the hydrodynamics under a strong interaction flow regime were conducted and data of the bed averaged dynamic liquid holdup were obtained.实验测定了脉冲流流型下的床层平均动持液量 。
2.0 MPa and room temperature,the effects of gas and liquid flowrates, liquid viscosity and operation pressure on the dynamic liquid holdup were investigated in a downward flow and upward flow fixed-bed reactor.床层中的动持液量是一个估算液体平均停留时间和液膜厚度必不可少的参数 ,也是反应器内液 -固接触效率的一个量度 ,它直接影响催化剂的润湿程度和反应器的性能 ,因此持液量常是关联固定床 (或滴流床 )反应器内传质系数和传热系数的变量之一 。
3.0 MPa, the effects of liquid and gas mass flowrates, liquid viscosity, packed particle size, packed height and pressure on the dynamic liquid holdup were investigated in a down flow trickle bed reactor.０ＭＰａ 的系统压力下测定了滴流床中气－液两相并流往下流动的动持液量，讨论了气－液流率、液相粘度、填料大小、压力以及床层高度对动持液量的影响。
6)column holdup塔身持液量
延伸阅读
持液量分子式：CAS号：性质：通常是指填料塔在操作时积存于填料表面上及空隙中的液体量，以m3液/(m3填料层)表示。持液量影响填料层的空隙率、压力降及传质面积等，总持液量为以下两部分之和：(1)静持液量，指填料塔进液及排滴停止后持有的液体量，它只取决于填料的大小、材料及液体的物性；(2)动持液量，指填料塔停止进液后排滴出去的液量，除与填料、液体的特性有关外，还随气、液的空塔速度的增大而加大，但在载点以下时与气速无关，约与液速的0.6次方成正比。
