ULTRA-LOW PRESSURE DROP PACKING SHEET WITH FLOW-GUIDING CUT-OUT WINDOWS AND STRUCTURED PACKING

摘要

A super low pressure drop structured packing sheet with diversion windows is disclosed. Diversion windows are formed on both of crests and troughs. When the diversion window and packing sheet are expanded horizontally, the diversion window comprises an opening and a fan-shaped portion; the area of the opening is 0%-1000% of that of the fan-shaped portion; and when the area of the opening is 0, the upper side of the opening coincides with the lower side of the opening; a region is defined between the lower side and horizontal axis of the window; the region below the axis is defined as positive, while the region above the axis is defined as negative; the area of the window should be greater than 0; the intersection line between the fan-shaped portion and packing sheet is symmetrical, the angel ± defined between the two is about 10°-170°. The fluid at the trough flows to a crest of the other side of the packing sheet with the help of diversion windows, thus increasing the area of vapor-liquid mass transfer. Additionally, when liquid goes across the diversion window, liquid at the bottom of the layer flow becomes the liquid on the liquid film, hence effectively facilitating update of the liquid film and turbulence, increasing mixture between the liquid and vapor, and improving rate of the mass transfer between vapor and liquid.