Prospectus

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DST-4 3-Pass Trays (Cont…)

Background and Discussion: Various models and rules of thumb for the design of multi-pass trays are available to the designer from suppliers and from the open literature. Designs have been constructed which have met with less than successful operation, to the point that some end users will not accept trays in excess of two flow passes. Conversely, many columns have been designed and successfully operated using three, four, or more liquid passes. Why many columns have exhibited good operation while some columns have not may be largely attributed to the designer's approach. The proposed program would investigate the two major philosophies of multi-pass tray design, equal bubbling area or equal flow path length, to determine the advantages and disadvantages of each in terms of both capacity and efficiency.

PROSPECTUS

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