精馏分离技术及进展(续) 毕业论文外文翻译_精品.doc

The Method of the Distillation and Develol~ment( Continuced) ZHAO Jin．q—vin．cl’．LIU Ion．cl~,WANG lu1,ZHANG W ei-wei’，SUN Lan—lan r7．Research Institute of Daqing Petrochemical Company,Daqing 163714，China；2．Department of Petrochemical Engineering，Daqing Petroleum Institute，Daqing 163714，China) Abstract：This paper consuls the foundation of a great deal of literature，it emphasizes tO introduce many distillation methods and industrial application，and the current development situation．It compares extractive distillation and constant boiling distillation，and introduces development of catalytic distillation technology． Key W ords：Separation technOlOgy：distil1atiOn method；reactive distillation1．Industrial application of an extractive distillation Extractive Distillation commonly used in industry butene / butadiene, and other components of C 4 gases. Separation of the two sets of devices C4 domestic law and the ACN solvent DMF method are very large, a solvent extraction tower than in the 7 to 8, not only energy, high solvent consumption, and the extractive distillation of liquid load is high, reducing the tower production capacity and the tray efficiency, the actual number of trays increases, offset by the increase after adding the relative volatility of the solvent so that the effect of reducing the required number of trays. Moreover, since the on-board liquid load, easy to flooding and reduce the tower to allow operation of vapor-liquid load. Therefore, the extractive distillation column generally low production capacity. In the extractive distillation process routes and inconvenience to change the case of the solvent, using a new type of tray efficiency within the component, is to improve the extractive distillation capacity of an effective strategy. If more than in recent years developed compound slant-hole overflow plate can replace the original valve tray to increase production capacity. Various separation methods developed in recent years the combination of separatio