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Residence time and fluid mixing on commercial scale sieve trays
Author(s) -
Bell Richard L.
Publication year - 1972
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690180307
Subject(s) - tray , sieve (category theory) , residence time (fluid dynamics) , residence time distribution , mixing (physics) , mechanics , isopropyl alcohol , flow (mathematics) , chemistry , geology , engineering , mathematics , geotechnical engineering , physics , mechanical engineering , organic chemistry , combinatorics , quantum mechanics
A fiber optic technique was used to obtain point residence time distributions at several points on an 8 ft. diam. sieve tray in hydrocarbon service. Residence time patterns were obtained over a wide range of vapor and liquid loadings with the isopropyl alcohol–water system and at both ends of the cyclohexane toluene system. The data reveal severe flow nonuniformities on the tray including nonuniform velocity distribution and retrograde flow near the column walls. The reasons for this behavior are discussed.