改进型卧式翻斗萃取器

介绍了改进型卧式翻斗萃取器的结构原理及其在流体力学与轴向混合、传质等方面的研究进展,指出了设计准则。     

实验室用小流量环隙式离心萃取器的研制

CTL50-N型小流量环隙式离心萃取器作为一种快速、高效的萃取试验设备，应用广泛，效果良好。本文详细介绍了该萃取器的工作原理、技术参数、结构设计和应用方面的情况。指出通过该萃取器的试验，能直观便捷的验证许多萃取数据，为萃取工艺的确定奠定基础。     

撞击流-旋转填料床萃取器传质性能研究

以磷酸三丁酯(煤油)-苯酚-水为试验体系，研究了IS—RPB萃取器的传质性能。在研究主要操作参数对萃取级效率影响的基础上，确定了最适宜的操作条件，得到了97％以上萃取级效率。试验结果表明，撞击流-旋转填料床萃取器是一种新型快速高效的萃取设备。     

脉冲筛板萃取塔在湿法磷酸工艺中的试验研究

依据溶剂萃取湿法磷酸的物性和脉冲筛板萃取塔的特性,设计脉冲筛板萃取塔,并进行盐酸法制取湿法磷酸的试验,得到萃取、洗涤、反萃3个过程的操作条件.在脉冲筛板萃取塔中,在萃取时相比为3:1,反应级为2～3,洗涤时相比为6:1,反萃时相比为3:1的条件下,所得磷酸及各项杂质含量指标均达到或优于老式萃取设备.试验表明,在初步间歇性试验中,用脉冲筛板萃取塔萃取磷酸,萃取效率高,操作简单,为进一步开发和完善新设备提供了基础数据.     

离心萃取器提取氢化可的松的工业试验研究

开发了用环隙式离心萃取器连续逆流提取氢化可的松的工艺流程，用D20和D230环隙式离心萃取器分别进行了台架试验和工业规模试验。台架试验结果表明，当转速为3400－4200r/min，醋酸丁酯与发酵液的流量分别为20mL／min和45mL/min时，氢化可的松粗品收率比工厂现行生产岗位的收率提高1．78％－12．1％，质量达到生产要求。工业试验结果表明，当转速为2000r/min，醋酸丁酯与发酵液的流量分别为1m^3/h和2m^3/h时，氢化可的松粗品收率比工厂现行生产岗位的收率提高2％，且减少了萃取剂耗量，降低了能耗。另外，用环隙式离心萃取器还可从染菌的发酵液中提取到氢化可的松。     

双溶剂液-液逆流分离模拟试验

研究了用离心萃取器进行双溶剂液 液逆流萃取工艺萃取分离β 甲基吡啶馏分的可行性模拟试验,并与小试进行了对比试验,得到较好试验结果。     

炼油装置中卧式热虹吸式重沸器的设计

炼油装置中卧式热虹吸式重沸器的设计、安装正确与否将直接影响到炼油装置的运行和产品质量。本文通过分析卧式热虹吸式重沸器的流体流速、安装高度以及结构参数等因素对卧式热虹吸式重沸器设计的影响,并提供了相关经验设计值,以期对今后卧式热虹吸式重沸器的设计选型有所帮助。     

超临界流体萃取过程中溶质浓度的非稳态现象

研究了超临界流体提取天然香料过程中溶质浓度的非稳态现象。分析了产生第一类和第二类非稳态的原因。认为对于萃取过程溶质浓度为非稳态物系的工业化装置，长径比大的萃取器设计较合理，多个萃取器串联工艺优于单个萃取器工艺。     

脉冲器充油系统研究

脉冲器充油系统是脉冲器保养和维修的重要设备,本文在介绍目前市场上广泛采用充油系统的原理基础上,提出了一种多功能脉冲器充油系统的充油原理、系统设计方案、系统组成以及系统的结构特点,最后按该方案生产制造出这种多功能脉冲器充油设备,通过充油试验,验证了该充油系统大大改善了脉冲器充油效率,并能满足用户对充油的温度控制要求,具有较好的市场和商业价值。     

脉冲器充油系统研究

脉冲器充油系统是脉冲器保养和维修的重要设备,本文在介绍目前市场上广泛采用充油系统的原理基础上,提出了一种多功能脉冲器充油系统的充油原理、系统设计方案、系统组成以及系统的结构特点,最后按该方案生产制造出这种多功能脉冲器充油设备,通过充油试验,验证了该充油系统大大改善了脉冲器充油效率,并能满足用户对充油的温度控制要求,具有较好的市场和商业价值。     

Experimental investigation on the mean drop size and drop size distribution in an L-shaped pulsed sieve-plate column

Vertical pulsed extraction columns cannot be employed in applications with height limitations. On the other hand, the horizontal extraction columns have low throughput, which affects their applicability in industrial applications. Therefore, there is a need to design a new type of extractors for such circumstances. In this paper, an experimental study on drop sizes has been implemented in a novel L-shaped pulsed sieve-plate extraction column in the absence and presence of mass transfer. Moreover, new correlations are developed for prediction of the mean drop size and size distribution using the log-normal probability density function.     

Auslegungskonzept für pulsierte Siebboden-Extraktoren

A concept for the design of pulsed sieve-plate extractors . A concept is presented for the design of pulsed sieve-plate extractors (PSE) according to which the column diameter is calculated via the flooding load and the column length by concentration profiles using the well known backmixing models. This concept requires some parameters to describe the hydrodynamic and mass transfer behaviour. The parameters depend on physical properties, operating conditions, and extractor geometry and subject to mutual influence. It is now possible to present correlations and models for prediction of these parameters. The mass transfer term can be determined by Sherwood correlations for single drops, using the Sauter mean drop diameter. The total mass transfer coefficient can be given as a function of column lenght. The calculated concentration profiles agree well with the measured profiles and thus the concept is confirmed.     

Longitudinal Dispersion of the Continuous Phase in Spray Extraction Columns

Longitudinal dispersion of the continuous phase was studied in spray extractors operated in the loose, close, and turbulized drop packing modes. The Peclet number was found to depend on the Reynolds number modified to take into account the hydrodynamic conditions in the working zone of the column. When the continuous phase is pulsed, the Peclet number is also governed by the modified Reynolds number, which accounts for the effect of pulsation on the longitudinal dispersion.     

反胶团萃取蛋白质设备

综述了反胶团萃取蛋白质设备的研究进展.按设备形式和操作方式的不同将反胶团萃取设备分为膜萃取器、离心萃取器、混合澄清槽和微分萃取器,指出了各自的优缺点,强调了萃取设备的基础研究和开发新型反胶团萃取设备的必要性.     

Hydrodynamic behaviour of a horizontal pulsed solvent extraction column. part 1: Flow characterization,throughput capacity and holdup

A horizontal pulsed solvent extraction column (HPC) has great potential in replacing vertical pulsed columns (VPC) in the separation of heavy elements in the nuclear industry. Published work examining the performance of the HPC suggests that the mass transfer efficiency for this column is comparable to the VPC, but information on the hydrodynamic characteristics of the HPC is sparse. This paper describes the flow characteristics of the HPC and presents experimental results and correlations for flooding conditions and holdup of the dispersed phase. Correlations obtained for the HPC for these hydrodynamic parameters are compared to published results for the VPC.     

Ethanolic extraction of sunflower oil in a pulsing extractor

Oil extraction by ethanol from partially defatted prepressed sunflower seeds in pulsed and nonpulsed extractors was compared. The oil yield was increased by 8.7% after short extraction periods (up to 6.06 residence times) with a pulsing flow, which was probably due to reduction in the axial dispersion that induces a greater concentration gradient between the miscella surrounding the solid and the bulk miscella.     

Transport of Gellan Gum Microbeads in Soil Columns of Various Grain Size Distributions

The transport of gellan gum microbeads as potential cell carriers was investigated in horizontal columns packed with different grain size classes of gravel (2–16 mm) and sand (0.25–2 mm). A suspension of microbeads was pulsed into each column for 6 h, followed by injection of water for 42 h. In general, the total amount of microbeads travelling across a given section of the column increased with injection time but decreased towards the column outlet, varying as a direct function of grain size. The results of this study demonstrate the feasibility of the transport of gellan gum microbeads through medium sand to medium gravel across distances up to 110 cm.     

液-液混合澄清萃取器的研究动态与发展方向

介绍了传统萃取设备的主要特点和各种型式。综述了新型结构的塔式混合澄清萃取器的研究与应用状况 ,提出了塔式混合澄清萃取器的不足及发展方向     

Prediction of Concentration Profiles in an L‐Shaped Pulsed Extraction Column

The L‐shaped extraction pulsed plate column is believed to be able to perform under operating conditions between those of the vertical and the horizontal pulsed plate columns. It has an extraction efficiency similar to the vertical pulsed plate column. Here, the mass transfer performance of this novel column type was investigated and the application of three different models, i.e., the plug flow, the axial dispersion, and the back flow models, was evaluated to predict the solute concentration profile along the column length. The water‐acetone‐n‐butyl acetate and the water‐acetone‐toluene systems were used. The influence of the operational parameters on the height of the mass transfer unit and the back flow coefficients was evaluated using the back flow model. New correlations were proposed to predict the height of the mass transfer unit along with the back flow coefficients in each phase, which were in satisfactory agreement with the experimental data.