复合板网填料性能研究

对一种新型的金属复合板网填料进行了研究,它是由三层板网贴合为复合基材后加工成波纹填料。在500冷模实验塔内对250Y型填料的测试结果表明复合板网填料具有显著的性能优势。三层复合板网填料的压降比常用的金属板波纹填料低60%以上,通量大20%～40%。氧解吸实验结果表明三层复合板网填料的分离效率明显高于单层板网填料,尤其在液气比低的工况下,效率可以倍增,和广泛应用的金属Mellapac填料相比,复合板网填料的分离效率能高30%左右。

Study on the Performan ce of Compound Meshed-Sheet Struct ured Packing in Packed Columns

A new kind of structured packing has been studied by laminating three meshed sheets one upon another to form a packing with the meshes of the meshed sheet sandwiched between the others being made fine and the meshes of the two outside being made large so as to improve liquid diffusing over the packing and the liquid gas mass transfer efficiency of the packing.Experiments were performed in a Pyrex glass column of 0.470m internal diameter with a packing height of 1.00m for all packing types. The column was operated in counter current with water air system. The liquid side mass transfer characteristic was tested by stripping oxygen from saturated water into air by means of the N OL H OL method. The packing tested had a specific geometric area of 250m 2/m 3. The experimental results show that the compound meshed sheet structured packing has many advantages over other structured packings. Thus it can be concluded that the compound meshed sheet structured packing may have a wide use in difficult separations with pressure gradient constraints,low relative volatilities,and/or small liquid holdup because of its very high efficiency,large capacity,and low pressure drop.