筛板不均匀漏液的规律及其影响

Maldistributed Weeping from Sieve Tray

筛板不均匀漏液的规律及其影响曾爱武刘富善许松林黄洁余国琮（天津大学化学工程研究所，天津３０００７２）关键词筛板不均匀漏液塔板效率１引言塔板漏液是一种导致塔板效率降低的纵向返混。在工程设计中通常以相对漏液１～１０％来决定气相负荷下限，但值得指出的...

Distribution of weeping from the sieve tray of 1.2 m diameter under various gas to liquid flow ratio was experimentally measured. It was found that the weeping is non uniformly distributed across the tray, and the maximum weeping load appears near the inlet weir owing to the high liquid head above the holes. A model was presented with the consideration of maldistributed weeping to show how the weeping distribution effects the tray efficiency at various Peclet numbers, point efficiencies, equilibrium constants, and gas to liquid flow rates. The model computation showed that the maldistributed weeping gives lower tray efficiency in comparison with the case of uniformly distributed weeping, and showed that the maldistribution of weeping can not be ignored in the sizing of trays.