Abstract:

A cold pilot model was constructed with four SQ type packings. The structure，hydrodynamics and mass transfer performance of the new packing were investigated. Results showed that pressure drop was reduced by a special arc-shaped corrugation of SQ type packing and improved gas and liquid distribution was afforded. The pressure drop of SQ800 was far below that of BHS800，when L=20.38 m³ /（m²·h）the pressure drop of SQ800 was 81.5% lower than that of BHS800. The highest number of theoretical stages of SQ1500 could be achieved up to 30 at atmospheric pressure. Although the efficiency of SQ1500—with a larger specific surface area than SQ800—showed a significant increase compared with SQ800，it occured with high energy consumption and narrow operational range. Sheet corrugated SQ125 has the best operation flexibility but the lowest separation efficiency，which is suitable for crude separation of raw materials. Sheet corrugated SQ250 has better separation efficiency and narrower operational range，which can be applied to old tower reform.