新型大通量规整填料的流体力学和传质性能研究

设计开发了A、B、C 3种比表面积为125 m2/m3的新型大通量规整填料。以空气-水为介质对填料进行冷模实验,研究其流体力学和传质性能,并在相同实验条件下与传统大通量填料Mellapak125X进行对比。实验结果表明,3种新型填料的塔压降均低于Mellapak125X,A、B两种填料的传质效率高于Mellapak125X;在喷淋密度L=33.72 m3/(m2·h)时,A、B、C 3种大通量填料的湿塔压降平均比Mellapak125X分别下降了26.7%、34.2%、40.3%,液泛气速平均分别比Mellapak125X大7.5%、11.3%、15.1%,A型填料等板高度平均比Mellapak125X低20%,B型填料的等板高度与Mellapak125X相似,C型填料的等板高度高于Mellapak125X。上述结果表明新型填料在增大通量的同时还保持了较高的分离效率。

Hydrodynamic and mass transfer performance of novel high capacity structured packings

A series of high capacity structured packing materials is proposed based on our previous work. The hydrodynamic performance and mass transfer efficiency of the new packing materialss was tested in a 500mm diameter column using an air-water-oxygen system at ambient pressure and temperature and the results are compared with those for Mellapak125X. As expected, the new packing materials have a much larger capacity and higher masstransfer efficiency. When L=33.72m3/(m2·h), the wet pressure drops for type A, type B and type C decreased by 26.7%, 34.2% and 40.3% respectively, compared with that of Mellapak125X. The flooding gas velocities of type A, type B and type C were 7.5%, 11.3% and 15.1% higher than that of Mellapak125X. Under the same experimental conditions, the HETP values for type A are 20% lower than that for Mellapak125X. The HETP values for type B are almost the same as that of Mellapak125X while the HETP values for type C are higher than that of Mellapack125X. As a consequence of geometry modification, the capacity of the new packing materials is increased without any adverse effect on mass-transfer efficiency.