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Priority claimed from US08/681,631external-prioritypatent/US5618473A/en
Application filed by Norton Chem Process ProdfiledCriticalNorton Chem Process Prod
Application grantedgrantedCritical
Publication of TW358035BpublicationCriticalpatent/TW358035B/en
Vaporization, Distillation, Condensation, Sublimation, And Cold Traps
(AREA)
Abstract
A sort of fractionation tray, having perforated fractionating trays and downcomers allowing liquid to flow from one tray to the tray immediately below, said downcomers being provided with radial outflow ports directing downflowing liquids towards the column wall rather than onto the surface of the tray directly below the downcomer, allowing at least a portion of the under-downcomer area be perforated thereby increasing the capacity of the tray for vapor/liquid contact and ensuring that weeping of the liquid through the perforations is avoided without needing an increase in vapor pressure.