FLOW PATTERN a good length of liquid path a very long liquid

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Presentation transcript:

FLOW PATTERN a good length of liquid path a very long liquid high liquid–vapor ratios

FLOW PATTERN Cross flow Double pass

SINGLE PASS

DOUBLE PASS

DOWN COMERS AND WEIRS

WEIR Straight Horizontal Adjustable Notched

DOUBLE PASS SLOPPED DOWNCOMERS

MECHANICAL SUPPORTS

MANWAY

TRAY HYDRAULICS

CAPACITY GRAPH FOR A TYPICAL BUBBLE-CAP TRAY

FLOW REGIMES

CLOSE-UPS Cellular foam Froth (Operating regime)

CLOSE-UPS Emulsion regime Froth regime

TRAY EFFICIENCY Overall efficiency Efficiency correlation (O’Connell, 1946)

MURPHREE EFFICIENCY MODEL It is possible to have Thus,

SIEVE TRAY LAYOUT Net area Hole area Active area

LIQUID PRESSURE HEADS ON SIEVE TRAY

PRESSURE HEADS ON BUBBLE CAP TRAY

COLUMN DIAMETER Estimate from VS

Capacity factor versus flow parameter

ADIOS! All of the references are provided during class lectures. All of the pictures are taken from various books and Websites solely for educational purpose. The author is thankful to Dr, Syeda Sultana Razia, associate professor, ChE, BUET, for developing the core concept of this presentation.