摘要
新型立体连续传质液体并流塔板是将LLC-Tray与两种并流流型相结合开发而成的新型塔板。通过实验测定了新型塔板的干、湿板压降,雾沫夹带,漏液等流体力学性能和传质性能,并进行关联得到了相应公式。结果表明,新型塔板板压降较低,雾沫夹带较低,液体处理量相对LLCT提高30%。
Parallel flow trays have attracted considerable attention to its high mass-transfer efficiency.The new tridimensional parallel flow tray with continuous mass-transfer combines two parallel flows and LLC-tray（LLCT）.The hydrodynamic characteristics of the tray,such as dry-pressure-drop,wet-pressure-drop,entrainment and weeping,and mass-transfer efficiency were measured and relevant correlations were obtained.The pressure drop and entrainment of the tray were lower.In a certain range of liquid flux,the effect of liquid flux on entrainment was negligible.When the gas velocity decreased to a critical point（the gas velocity through the plate hole was about 12 m·s-1）,the weeping of ring flow started earlier than the converged flow.The liquid flow rate was 30% higher than that with LLCT because the parallel flow tray avoided the liquid stagnation zone on common countercurrent trays.With several downcomers the flow distance of liquid was shorter and the gradient of liquid level was reduced.The mass transfer efficiency of the tray was higher than that of LLCT and the efficiency of ring flow was higher than converged flow because of different length of liquid passage.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2012年第1期84-89,共6页
CIESC Journal
基金
石家庄科学技术研究与发展项目(10108481A)~~
