双曲型高效规整填料的流体力学和传质性能

Hydrodynamic and mass transfer performance characteristics of SQ type high efficiency structured packing

用两种双曲(SQ)型金属丝网波纹填料在内径为500 mm,填料高度为1 m的有机玻璃塔内进行冷膜实验。通过研究SQ型填料的流体力学和传质性能可知,此填料特殊的弧形波纹结构改善了气液分布。实验结果显示SQ型填料的传质性能要优于传统填料CY-700,当L=25.48 m3/(m2.h)时,SQ-700的HETP值比CY-700相对降低44.5%。对于同种SQ型填料,其压降,泛点和等板高度符合一般填料的变化规律,而SQ-800的比表面积大于SQ-700,故而传质效率高,能耗高,可操作范围小。

A cold pilot model was constructed using a 0. 5 m-diameter plexiglass column that was packed with a 1.0 m-height SQ type packing. The structure, hydrodynamics and mass transfer performance of the new packing were investigated, and the results showed that a special arc-shaped corrugation of SQ type packing afforded improved gas and liquid distribution. The expected efficiency advantage was demonstrated by comparison with the traditional packing CY-700; when L =25.48 m3/（m2 .h） , the height equivalent to theoretical plate （HETP） of SQ-700 was 44.5% lower than that for CY-700. The pressure drop, flooding gas velocity and HETP values for the series of SQ type packings show the same trend as other structured packings. Although the efficiency of SQ-800--with a larger specific surface area than SQ-700--shows a significant increase compared with SQ-700, this occurs at the cost of high energy consumption and narrow operational range.