一种由稳态浓度剖面计算萃取柱中轴向混合系数和“真实”传质单元高度的方法

本文提出了一种根据扩散模型用最优化方法拟合浓度剖面的计算方法,可以在有传质情况下,较准确地由实验测定的稳态浓度剖面,同时求得轴向混合系数和扣除了轴向混合影响后的“真实”质单元高度.并已成功地用于脉冲筛板萃取柱的传质性能研究中.     

用改进的基团贡献法计算二元体系液相分子扩散系数

一种改进的用基团贡献原理计算二元体系液相分子扩散系数的方法,可用于大部分非理想液相体系。用150多个体系的1000多个实验点对此方法进行了验证,结果表明对于理想体系和无限稀释溶液的分子扩散系数,计算值与实验值平均相对误差不超过5%,对于大部分的非理想体系其平均相对误差小于10%。与原有的经验、半经验关联式相比,改进的方法具有更大的适用范围,能更准确地预测液相分子扩散系数。     

Experimental and Numerical Investigations of Single Drop Mass Transfer in Solvent Extraction Systems with Resistance in Both Phases

Numerical simulation of transient mass transfer to a single drop controlled by the internal resistance or by the resistance in both phases was mathematically formulated and simulated in a boundary-fitted orthogonal coordinate system. The simulated results on the transient mass transfer dominated by the internal resistance are in good agreement with the Newman and Kronig-Brink models for drops with low Reynolds number. When the drop Reynolds number is up to 200, the mass transfer coefficient from numerical simulation is very low as compared with the Handlos-Baron model. The cases with mass transfer resistance residing in both the continuous and drop phases were simulated successfully and compared with the experimental data in three extraction systems recommended by European Confederation of Chemical Engineering (EFCE). For single drops with Re < 200, the numerically predicted values of the extraction fraction and overall mass transfer coefficient are in reasonable coincidence with the experimental data. I     

新型填料在液一液萃取中研究和应用的若干进展

本文介绍了新型填料塔在液—液苹取中研究和应用方面的进展,在介绍新型填料优点的同时,也指出了一些令人关注的问题.指出在液—液萃取过程中使用新型填料时,必须充分注意过程的特点。     

内弯弧形筋片扁环填料的特点和应用前景

内弯弧形筋片扁环填料是一种结构新疆，性能优异的高效填料，获国家发明专利系统的实验研究和工业应用表明，这种填料的性能优于多种国外引进的新型填料，可望在石油炼制，化工，湿法冶金和医药等领域的萃取，精馏和吸收等过程中获得更广泛的应用。     

溶剂萃取研究和应用的新进展

回顾了溶剂萃取发展的历史和对各工业部门发展的重要作用。分析了新技术革命对溶剂萃取提出的挑战和提供的机遇。并以国家重点化学工程联合实验室的实践为例，说明基础研究成果的转化将产生重大的经济效益和社会效益     

填料萃取塔的数学模型

对描述萃取塔传质性能的几种数学模型进行分析和比较,针对填料萃取塔的特点对其中有发展前途的复合模型进行了详细讨论。总结出模型参数的计算方法。编制了用数值方法进行模型求解的计算机软件。利用文献数据对模型进行检验,结果显示了很好的一致性。     

QH—1新型填料萃取塔轴向混合和传质性能研究

针对润滑油精制等实际应用的特点，选用低界面张力的正丁醇－丁二酸－水体系，在φ１００ｍｍ的填料萃取柱中对国外引进的两种新型填料和我校新开发的ＱＨ－１型填料的萃取性能进行了比较。结果表明，ＱＨ－１型填料的传质效率最高，轴向返混最小。     

超级扁环填料及其在气体净化过程中的应用前景

国内外最新研究工作表明．对于高液-气比的吸收、高压精馏和液-液萃取．应用散装填料优于规整填料和塔盘。其中，超级扁环填料(QH-1型和QH-2型等)具有独特的结构和优异性能。本文介绍了超级扁环的最新研究结果及其在合成氨厂气体净化等高液气比吸收过程中的应用前景。     

萃取体系滴内和两相阻力控制的单液滴传质实验和数值模拟研究

Numerical simulation of transient mass transfer to a single drop controlled by the internal resistance or by the resistance in both phases was mathematically formulated and simulated in a boundary-fitted orthogonal coordinate system. The simulated results on the transient mass transfer dominated by the internal resistance are in good agreement with the Newman and Kronig-Brink models for drops with low Reynolds number. When the drop Reynolds number is up to 200, the mass transfer coefficient from numerical simulation is very low as compared with the Handlos-Baron model. The cases with mass transfer resistance residing in both the continuous and drop phases were simulated successfully and compared with the experimental data in three extraction systems recommended by European Confederation of Chemical Engineering (EFCE). For single drops with Re ＜ 200, the numerically predicted values of the extraction fraction and overall mass transfer coefficient are in reasonable coincidence with the experimental data. It is concluded that the numerical simulation can be resorted in some cases of solvent extraction for conducting numerical experiments and parametric study. Nevertheless, for better resolution as higher Reynolds number drops are simulated, more sophisticated techniques should be developed and incorporated to deal with the large deformation and transient shape oscillation as well as possible Marangoni effect.