Weeping from sieve trays

Abstract

A comprehensive study has been made on the rates of liquid weeping from sieve trays in a hydraulic simulator.Results are reported both for air-water and air-Isopar M. A wide range of tray geometries and flow rates was used. The influence on the weep rate of individual parameters such as hole gas velocity, liquid rate, weir height, hole diameter, and fractional perforation area is discussed. The results have been correlated by expressing the weep flux as a function of the Froude number.

Design of Sieve Plate Spargers for Bubble Columns: Role of Weeping

“…Lockett and Banik [16] have studied weeping in 3.2, 6.4, and 12.7 mm perforation plates in a large rectangular column (1.22 m 0.63 m). The free area was in the range of 10.2 to 15 %.…”

Generalization of AIChE and colburn models for tray efficiency

“…For sieve plates with large holes, Koziol and Koch [38] deduced a semiempirical correlation, making it possible to calculate the weeping factor for the water-air system. A correlation valid for this system was presented by Lockett and Banik [39] in 1986. The effect of preasure on liquid weeping was recently investigated by Priestman and Brown [40].…”

Computational Fluid Dynamics versus Experiment: An Investigation on Liquid Weeping of Nye Trays

“…The height of the separator baffle is crucial for determining the liquid wept from the two halves of the tray. To prevent any effect on the gas distribution, the height of the separator baffle must be lower than that of the chimney caps, and it must prevent any overflowing between the two sides [33,34]. The comparison between the experimental data and numerical predictions was limited to the relatively restricted set of available computational power and experimental data in the literature.…”