| Stereoscopic and Swirl Parallel Flow Tray (SSPT) is new type of trays that designed byProfessor Zhang Shaofeng’s research team in Hebei University of Technology. This traycombines the advantages of swirl plate trays and sieve trays. As a very broad applicationprospects of the new plates, in-depth study of the gas-liquid two-phase flow of its body board,has very important significance.In this paper, CFD physical model of two-phase fluid flow of SSPT which with adiameter of219mm was established. And the wet plate pressure drop at the conditions ofdifferent gas velocities and liquid to gas ratio was simulated by using STAR-CCM+. Considerthe different blade twist angle and plate height to impact on the flow field and wet platepressure drop. And regards these as a basis for optimization of plate structures. Meanwhile,gas-liquid two-phase flow field of tray was simulated and liquid flow field distributions withdifferent operating conditions were calculated. Gas-liquid two-phase flow conditions fromdifferent sections were researched and the internal flow field conditions of SSPT wereanalyzed.The simulation results show that the liquid flows uniformity in overall internal of theplate. There is no reflow phenomenon and recirculation zone on the plate. No obviouswhirlpool was existed on the plate. The gas-liquid contacted uniformly. The plate has a lowerpressure drop than the other plate when working in complex conditions. The gas-liquidturbulent very intense on the blade surface where close to the entrance of the plate. Due tothe special structure of the blade, making the gas-liquid two-phase pass through the sieveplate twice, so that can improve the efficiency of the mass transfer. The height of liquid layeron the surface of the blade was very small, so can stamps the liquid layer lagging, helps toreduce the overall tray pressure drop and eliminates entrained gas foam effectively. |
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