填料类型对脉冲填料萃取塔性能的影响

采用３０％ＴＢＰ（煤油）／ＨＡｃ／水体系研究了脉冲填料萃取塔的流体动力学和传质特性,考察了脉冲强度和填普类型对塔性能的影响。实验表明装填ＱＨ－１型扁环的脉冲填料 性能明显优于装填陶瓷和不锈钢拉西环的脉冲塔。文中给出了装填ＱＨ－１型扁环的脉冲填普塔的特性速度和Ｈｏｘｐ的经验计算式。     

板波填料萃取塔的实验研究(Ⅰ)流体力学特性

在内径分别为40、100mm的板波填料萃取塔中,对30%TBP(煤油)-醋酸-水和正丁醇-丁二酸-水两种体系的流体力学特性进行了实验研究,并对实验数据进行分析处理,得到了描述板波填料萃取塔流体力学行为的关联式U_x/(e(1-φ))+U_y/(eφ)=c(a/eg·ρ_c/Δρ)~(-1/2)·(1-φ)~n     

板波填料萃取塔的实验研究(Ⅱ)传质性能

本文应用扩散模型并采用最优化方法拟合实测的稳态浓度剖面,在内径40mm、100mm的板波填料萃取塔中,用30%TBP(煤油)-醋酸-水和正丁醇-丁二酸-水两种体系研究了板波填料萃取塔的传质性能.     

往复振动筛板萃取塔萃取机理研究进展

介绍了往复振动筛板萃取塔（RPEC）流体力学性能和传质性能研究现状。     

稀盐酸萃取林可霉素药品中B组分的传质研究

采用双膜理论对酸水萃取正丁醇溶剂中林可霉素B组分的传质过程进行了分析,分析结果表明传质阻力主要集中在滴内。在往复振动筛板萃取塔内,对酸水萃取正丁醇溶剂中林可霉素B组分进行了实验研究,考察了输入能量和通量对总传质系数的影响。研究表明:虽然输入能量可以强化滴外传质,但对总传质系数的影响却较小;而通量的增加使不同液滴间的碰撞、聚合、再分散作用加强,从而强化了液滴内传质,因此通量对总传质系数的影响比较大。所以,对于酸水萃取正丁醇溶剂中林可霉素B组分这类传质阻力主要集中在滴内的物系,在设计往复振动筛板萃取塔时不应将提高输入能量作为强化传质的主要控制手段,而是提高通量。     

填料萃取塔流体力学特性的研究

本文用三种物系:煤油-水、煤油-26.1％甘油水溶液,二乙基己醇-水。填料塔的直径是75mm,用三种类型的填料:瓷拉西环、瓷矩鞍环、瓷θ环。在无传质的情况下,对填料萃取塔的分散相滞存率和压降进行研究。根据实验数据用线性回归法得到可预测泛点条件下的压降和分散相滞存率的关联式。     

脉冲填料萃取塔性能强化的研究

针对己内酰胺等工业装置脉冲填料萃取塔扩能改造的迫切要求,在(φ)100mm的实验塔中用四种体系研究了填料类型、脉冲强度、体系物性和操作条件等对脉冲填料萃取塔流体力学和传质性能的影响.实验结果表明,QH-1型扁环填料的处理能力和传质效率明显高于拉西环填料.脉冲强度对塔内分散相的液滴平均直径、存留分数和塔性能具有重要影响.因此,填料的选型和脉冲强度的调优是脉冲填料萃取塔强化的关键因素.     

机械搅拌萃取塔中影响传质效果的几个因素

对浆叶旋转式和筛板振动式两种机械搅拌萃取塔进行了传质方面的研究。通过测试大量的实验数据。及计算绘制的图表，校系统地考察分析了旋转（振动）频率，筛板振幅，两相界面，停留时间即取样时间等因素对传质效果的影响，并确定出了最适宜的操作条件。     

DNPOH的连续萃取工艺研究

选型并采用一种往复振动筛板塔对2,2–二硝基丙醇（DNPOH）的反应液进行萃取,确定了较佳的萃取条件：萃取温度为35℃,振动频率17.5 Hz,振幅15 mm,溶剂比R=0.5,界面位置控制在视镜中部。较佳萃取条件下,萃取率达到99.5%~100%。     

规整填料塔的壁流量计算

推导了板波纹填料塔的壁流量计算方法 ,并探讨填料层分段高度的选择。     

Comparative study of dry pressure drop and flow behaviour of gas flow through sieve plate packing

Sieve plate packing is a newly developed packing that has been used in several industries due to its simple structure and operating flexibility, and no liquid flooding. In this work, first, systematic experiments were conducted to measure the pressure drop of gas flow through six sieve plate packings. The results indicated that the geometric characteristics of the packing have complicated effects on the pressure drops. Based on this, CFD simulations on the gas flow field were conducted using the realizable k-ε model, and flow behaviours such as the pressure drop, pressure nephogram, and velocity distributions within different packings were obtained. The simulation results clearly showed interesting flow patterns, including the contraction and expansion of the gas stream through the sieve hole, the flow separation on the sharp edge of the hole, and the vortexes formed when gas impacts the downstream plate. By comparing the flow patterns and the pressure drop under different packings operating at different conditions, the effects of the geometric characteristics of the packing on the pressure drop could be clearly distinguished from the flow behaviours, so that the variations in pressure drop with various packing structures were clearly indicated. Finally, based on the experimental data and the simulated results, correlations for the prediction of the pressure drops were proposed. This work will provide a useful basis for understanding the flow behaviour of gas and liquid two-phase flow in sieve plate packing.     

工艺模拟对精馏塔设计的影响

采用传统设计方法,塔的操作压力变化对常压塔和加压塔的影响很小,但对于减压塔的影响较大。本文论述减压精馏塔设计应考虑工艺计算和设备设计并行模拟的方法。     

Comparison of the Performance of a Pulsed Disc and Doughnut Column with a Pulsed Sieve Plate Liquid Extraction Column

Abstract

The hydrodynamic and mass‐transfer performance of a 75 mm diameter pulsed disc and doughnut column (PDD) and a pulsed sieve‐plate column (PSP) are presented and compared for a toluene–acetone–water system under similar operating conditions. It was found that the pulsed disc and doughnut column flooded earlier than the pulsed sieve‐plate column, indicating that the total throughput per unit cross‐sectional area through the pulsed disc and doughnut column was less. At similar operating conditions (i.e., flowrates, pulse frequency, and amplitude), the mass‐transfer performance of the pulsed disc and doughnut column was higher, and its holdup higher. The mass‐transfer performance of the PSP column, when compared at similar holdup to the PDD, was found to be higher, and so it is concluded that it is a more efficient column for this system.     

丙烯酸乙酯脱酸塔流程优化及改造

对丙烯酸乙酯生产工艺中的5011、502脱酸塔双塔流程进行了模拟计算,根据计算结果,对原流程进行了优化,将双塔流程优化为单塔流程,并采用规整填料对原板式塔进行了改造,使得产品丙烯酸乙酯中丙烯酸的质量浓度由原来的几千mg/L降到了10mg/L以下, 证明流程优化是可行的。     

高效导向筛板及填料在乙酸乙烯-乙酸甲酯精馏技改中的研究与应用

采用高效导向筛板与填料对乙酸乙烯-乙酸甲酯精馏塔进行了技改设计,技改后扩大生产能力40%,大幅度提高了分离效率,节能30%,降低原料消耗1380t/a。技改的设备投资为6万元,年增经济效益772万元。     

浅谈塔设备的分类及性能

从板式塔的塔盘结构和填料塔所用的填料等几个方面讨论,分析了其对塔设备性能的影响,并提出了其具有的相应的优缺点。     

塔填料的研究现状及发展趋势

介绍了散堆填料的发展过程，分析了通过改变散堆填料的几何结构以改变填料性能的方法；并对规整填料的发展、现状作了综述性的介绍，阐述了提高规整填料传质效率的途径；简单分析了今后填料塔的发展方向。     

大型脉冲填料塔应用于反应萃取耦合的设计方法初探

分析了大型脉冲填料塔应用于反应萃取塔设计的技术难点,以己内酰胺生产装置中环己酮肟化反应为基础,建立了反应萃取耦合填料塔的计算方法,对反应和萃取耦合塔进行了初步设计,提出了优化反应器结构、采用高效填料以提高萃取反应效率的方法。     

气-液并流通过堆叠筛板填料的脉冲流特性

通过高速摄像机和压力传感器测量,对脉冲流的产生机理、筛板数的影响、液相脉冲传播速度及频率进行了系统的研究。实验发现：脉冲流是重力和气流曳力作用下,孔口液相波动在向下传播过程中被叠加放大的动力学过程,且与气、液流量及筛板数密切相关;一定气量下,脉冲流的产生需要有一个最小（临界）液相流量,且增加液量可促进局部脉冲的产生,并使液相脉冲传播速度与频率均增大;临界液量之上,增大气量,气相的扰动作用增强,局部脉冲越容易产生,从而导致脉冲传播速度与频率均增大;进一步增大气量,液相脉冲会被逐渐分散,导致脉冲传播速度与脉冲频率均减小。增加筛板数,有利于增强脉冲流强度,从而导致脉冲流范围变宽,当筛板数少于三块时不会出现脉冲流。最后,基于实验结果分析,提出了脉冲传播速度及频率的预测关联式。