泡沫碳化硅波纹规整填料内的液体流动特性

Liquid flow characteristics of structured corrugation Si C-foam packing sheets

通过采用配备微距镜头的高速摄像仪记录单波纹片上的液体流动行为,发现了泡沫碳化硅波纹规整填料内同时存在液膜流动和准壁流两种液体流动模式。同时测定了组合波纹片之间的液体传递量,并将泡沫碳化硅波纹规整填料与金属丝网波纹填料和金属板波纹规整填料的测试结果进行比较,结果表明泡沫碳化硅波纹规整填料的单波纹片上的液体扩散程度较大,组合波纹片之间的液体传递量高于金属丝网波纹填料和金属板波纹规整填料。研究结果揭示了泡沫碳化硅波纹规整填料具有高效传质特性的根本原因在于其独特的三维空间网孔结构增强了液体在单波纹片上的横向扩散能力和在组合波纹片之间的径向传递能力,为新型高效规整填料的机理研究和进一步开发开拓了思路。

The microscopic liquid flow characteristics of the structured corrugation foam packing（SCFP） sheets with different combinations of the pore size and the extrusion ratio are observed experimentally in this paper. The tracks of liquid water under different flow rates were recorded by a high-speed camera with a micro lens. A combination of liquid film and quasi-wall flow is verified as the unique liquid flow pattern in SCFP sheets. Besides, the study on the liquid transportation of combined SCFP sheets is carried out. Furthermore, the liquid flow characteristics of SCFP sheets are compared with two classical packing sheets widely used in distillation. The comparison results demonstrate that the unique three-dimensional network structure of Si C skeleton makes SCFP sheets realize larger liquid dispersion degree for single corrugated sheet and better liquid transportation capability for combined corrugated sheets. The study suggests that Si C-foam material has a broad application prospect in the field of structured packing.