Freelance2000控制系统在高炉电动鼓风机的应用

介绍本钢铁业公司电动鼓风机及控制系统概况,对ABB公司Freelnce2000DCS自动控制系统在高炉鼓风机上的应用进行了简介,对防喘振调节,做了详细分析和探讨,并对这套系统的设计存在的不足提出了改进的措施.     

Mathematical model of the dynamics of countercurrent chromatography

A mathematical model of the dynamic behavior of countercurrent chromatography was proposed, and the model parameters, including the partition coefficient, the axial dispersion coefficient, the intraparticle diffusion coefficient and the external mass ransfer coefficient were calculated by the method of chromatogram moment analysis. Comparison of the experimental chromatograms of caffeine and theophylline determined in this work with the simulated curves computed by the proposed model showed fairly good agreement. Further, the difference between the average identified the partition coefficients by chromatogram moment analysis and the experimental values was small also, and the relationship between the external mass transfer rate and the linear velocity was similar to that obtained with solid-liquid chromatography.     

分子筛法制取无水乙醇工艺的改进

介绍了分子筛法制取无水乙醇的工艺,探索了对分子筛中所含的乙醇采用蒸馏水多级还向没提回收的方法